The Design and Implementation of the FreeBSD Operating System, Second Edition
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FreeBSD/Linux Kernel Cross Reference
sys/dev/arcmsr/arcmsr.h

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    1 /*
    2 ***********************************************************************************************
    3 **        O.S   : FreeBSD
    4 **   FILE NAME  : arcmsr.h
    5 **        BY    : Erich Chen, Ching Huang
    6 **   Description: SCSI RAID Device Driver for 
    7 **                ARECA SATA/SAS RAID HOST Adapter
    8 **                [RAID controller:INTEL 331(PCI-X) 341(PCI-EXPRESS) chip set]
    9 ***********************************************************************************************
   10 ************************************************************************
   11 ** Copyright (C) 2002 - 2010, Areca Technology Corporation All rights reserved.
   12 **
   13 **     Web site: www.areca.com.tw
   14 **       E-mail: erich@areca.com.tw; ching2048@areca.com.tw
   15 **
   16 ** Redistribution and use in source and binary forms,with or without
   17 ** modification,are permitted provided that the following conditions
   18 ** are met:
   19 ** 1. Redistributions of source code must retain the above copyright
   20 **    notice,this list of conditions and the following disclaimer.
   21 ** 2. Redistributions in binary form must reproduce the above copyright
   22 **    notice,this list of conditions and the following disclaimer in the
   23 **    documentation and/or other materials provided with the distribution.
   24 ** 3. The name of the author may not be used to endorse or promote products
   25 **    derived from this software without specific prior written permission.
   26 **
   27 ** THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   28 ** IMPLIED WARRANTIES,INCLUDING,BUT NOT LIMITED TO,THE IMPLIED WARRANTIES
   29 ** OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   30 ** IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,INDIRECT,
   31 ** INCIDENTAL,SPECIAL,EXEMPLARY,OR CONSEQUENTIAL DAMAGES(INCLUDING,BUT
   32 ** NOT LIMITED TO,PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   33 ** DATA,OR PROFITS; OR BUSINESS INTERRUPTION)HOWEVER CAUSED AND ON ANY
   34 ** THEORY OF LIABILITY,WHETHER IN CONTRACT,STRICT LIABILITY,OR TORT
   35 **(INCLUDING NEGLIGENCE OR OTHERWISE)ARISING IN ANY WAY OUT OF THE USE OF
   36 ** THIS SOFTWARE,EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   37 **************************************************************************
   38 * $FreeBSD: releng/8.2/sys/dev/arcmsr/arcmsr.h 215825 2010-11-25 18:21:08Z delphij $
   39 */
   40 #define ARCMSR_SCSI_INITIATOR_ID                        255
   41 #define ARCMSR_DEV_SECTOR_SIZE                          512
   42 #define ARCMSR_MAX_XFER_SECTORS                         4096
   43 #define ARCMSR_MAX_TARGETID                                     17 /*16 max target id + 1*/
   44 #define ARCMSR_MAX_TARGETLUN                            8 /*8*/
   45 #define ARCMSR_MAX_CHIPTYPE_NUM                         4
   46 #define ARCMSR_MAX_OUTSTANDING_CMD                      256
   47 #define ARCMSR_MAX_START_JOB                            257
   48 #define ARCMSR_MAX_CMD_PERLUN                           ARCMSR_MAX_OUTSTANDING_CMD
   49 #define ARCMSR_MAX_FREESRB_NUM                          320
   50 #define ARCMSR_MAX_QBUFFER                                      4096 /* ioctl QBUFFER */
   51 #define ARCMSR_MAX_SG_ENTRIES                           38 /* max 38*/
   52 #define ARCMSR_MAX_ADAPTER                                      4
   53 #define ARCMSR_RELEASE_SIMQ_LEVEL                       230
   54 #define ARCMSR_MAX_HBB_POSTQUEUE                        264 /* (ARCMSR_MAX_OUTSTANDING_CMD+8) */
   55 /*
   56 *********************************************************************
   57 */
   58 #ifndef TRUE
   59         #define TRUE  1
   60 #endif
   61 #ifndef FALSE
   62         #define FALSE 0
   63 #endif
   64 #ifndef INTR_ENTROPY
   65         # define INTR_ENTROPY 0
   66 #endif
   67 
   68 #ifndef offsetof
   69         #define offsetof(type, member)  ((size_t)(&((type *)0)->member))
   70 #endif
   71 /*
   72 **********************************************************************************
   73 **
   74 **********************************************************************************
   75 */
   76 #define PCI_VENDOR_ID_ARECA                             0x17D3 /* Vendor ID     */
   77 #define PCI_DEVICE_ID_ARECA_1110        0x1110 /* Device ID     */
   78 #define PCI_DEVICE_ID_ARECA_1120        0x1120 /* Device ID     */
   79 #define PCI_DEVICE_ID_ARECA_1130        0x1130 /* Device ID     */
   80 #define PCI_DEVICE_ID_ARECA_1160        0x1160 /* Device ID     */
   81 #define PCI_DEVICE_ID_ARECA_1170        0x1170 /* Device ID     */
   82 #define PCI_DEVICE_ID_ARECA_1200        0x1200 /* Device ID     */
   83 #define PCI_DEVICE_ID_ARECA_1201        0x1201 /* Device ID     */
   84 #define PCI_DEVICE_ID_ARECA_1210        0x1210 /* Device ID     */
   85 #define PCI_DEVICE_ID_ARECA_1212        0x1212 /* Device ID     */
   86 #define PCI_DEVICE_ID_ARECA_1220        0x1220 /* Device ID     */
   87 #define PCI_DEVICE_ID_ARECA_1222        0x1222 /* Device ID     */
   88 #define PCI_DEVICE_ID_ARECA_1230        0x1230 /* Device ID     */
   89 #define PCI_DEVICE_ID_ARECA_1231        0x1231 /* Device ID     */
   90 #define PCI_DEVICE_ID_ARECA_1260        0x1260 /* Device ID     */
   91 #define PCI_DEVICE_ID_ARECA_1261        0x1261 /* Device ID     */
   92 #define PCI_DEVICE_ID_ARECA_1270        0x1270 /* Device ID     */
   93 #define PCI_DEVICE_ID_ARECA_1280        0x1280 /* Device ID     */
   94 #define PCI_DEVICE_ID_ARECA_1380        0x1380 /* Device ID     */
   95 #define PCI_DEVICE_ID_ARECA_1381        0x1381 /* Device ID     */
   96 #define PCI_DEVICE_ID_ARECA_1680        0x1680 /* Device ID     */
   97 #define PCI_DEVICE_ID_ARECA_1681        0x1681 /* Device ID     */
   98 #define PCI_DEVICE_ID_ARECA_1880        0x1880 /* Device ID     */
   99 
  100 #define PCIDevVenIDARC1110              0x111017D3 /* Vendor Device ID  */
  101 #define PCIDevVenIDARC1120              0x112017D3 /* Vendor Device ID  */
  102 #define PCIDevVenIDARC1130              0x113017D3 /* Vendor Device ID  */
  103 #define PCIDevVenIDARC1160              0x116017D3 /* Vendor Device ID  */
  104 #define PCIDevVenIDARC1170              0x117017D3 /* Vendor Device ID  */
  105 #define PCIDevVenIDARC1200              0x120017D3 /* Vendor Device ID  */
  106 #define PCIDevVenIDARC1201              0x120117D3 /* Vendor Device ID  */
  107 #define PCIDevVenIDARC1210              0x121017D3 /* Vendor Device ID  */
  108 #define PCIDevVenIDARC1212              0x121217D3 /* Vendor Device ID  */
  109 #define PCIDevVenIDARC1220              0x122017D3 /* Vendor Device ID  */
  110 #define PCIDevVenIDARC1222              0x122217D3 /* Vendor Device ID  */
  111 #define PCIDevVenIDARC1230              0x123017D3 /* Vendor Device ID  */
  112 #define PCIDevVenIDARC1231              0x123117D3 /* Vendor Device ID  */
  113 #define PCIDevVenIDARC1260              0x126017D3 /* Vendor Device ID  */
  114 #define PCIDevVenIDARC1261              0x126117D3 /* Vendor Device ID  */
  115 #define PCIDevVenIDARC1270              0x127017D3 /* Vendor Device ID  */
  116 #define PCIDevVenIDARC1280              0x128017D3 /* Vendor Device ID  */
  117 #define PCIDevVenIDARC1380              0x138017D3 /* Vendor Device ID  */
  118 #define PCIDevVenIDARC1381              0x138117D3 /* Vendor Device ID  */
  119 #define PCIDevVenIDARC1680              0x168017D3 /* Vendor Device ID  */
  120 #define PCIDevVenIDARC1681              0x168117D3 /* Vendor Device ID  */
  121 #define PCIDevVenIDARC1880              0x188017D3 /* Vendor Device ID  */
  122 
  123 #ifndef PCIR_BARS
  124         #define PCIR_BARS       0x10
  125         #define PCIR_BAR(x)     (PCIR_BARS + (x) * 4)
  126 #endif
  127 
  128 #define PCI_BASE_ADDR0                  0x10
  129 #define PCI_BASE_ADDR1                  0x14
  130 #define PCI_BASE_ADDR2                  0x18
  131 #define PCI_BASE_ADDR3                  0x1C
  132 #define PCI_BASE_ADDR4                  0x20
  133 #define PCI_BASE_ADDR5                  0x24
  134 /*
  135 **********************************************************************************
  136 **
  137 **********************************************************************************
  138 */
  139 #define ARCMSR_SCSICMD_IOCTL            0x77
  140 #define ARCMSR_CDEVSW_IOCTL             0x88
  141 #define ARCMSR_MESSAGE_FAIL             0x0001
  142 #define ARCMSR_MESSAGE_SUCCESS          0x0000
  143 /*
  144 **********************************************************************************
  145 **
  146 **********************************************************************************
  147 */
  148 #define arcmsr_ccbsrb_ptr               spriv_ptr0
  149 #define arcmsr_ccbacb_ptr               spriv_ptr1
  150 #define dma_addr_hi32(addr)             (u_int32_t) ((addr>>16)>>16)
  151 #define dma_addr_lo32(addr)             (u_int32_t) (addr & 0xffffffff)
  152 #define get_min(x,y)            ((x) < (y) ? (x) : (y))
  153 #define get_max(x,y)            ((x) < (y) ? (y) : (x))
  154 /*
  155 **********************************************************************************
  156 **
  157 **********************************************************************************
  158 */
  159 struct CMD_MESSAGE {
  160       u_int32_t HeaderLength;
  161       u_int8_t Signature[8];
  162       u_int32_t Timeout;
  163       u_int32_t ControlCode;
  164       u_int32_t ReturnCode;
  165       u_int32_t Length;
  166 };
  167 
  168 struct CMD_MESSAGE_FIELD {
  169     struct CMD_MESSAGE cmdmessage; /* ioctl header */
  170     u_int8_t           messagedatabuffer[1032]; /* areca gui program does not accept more than 1031 byte */
  171 };
  172 
  173 /************************************************************************/
  174 /************************************************************************/
  175 
  176 #define ARCMSR_IOP_ERROR_ILLEGALPCI             0x0001
  177 #define ARCMSR_IOP_ERROR_VENDORID               0x0002
  178 #define ARCMSR_IOP_ERROR_DEVICEID               0x0002
  179 #define ARCMSR_IOP_ERROR_ILLEGALCDB             0x0003
  180 #define ARCMSR_IOP_ERROR_UNKNOW_CDBERR          0x0004
  181 #define ARCMSR_SYS_ERROR_MEMORY_ALLOCATE        0x0005
  182 #define ARCMSR_SYS_ERROR_MEMORY_CROSS4G         0x0006
  183 #define ARCMSR_SYS_ERROR_MEMORY_LACK            0x0007
  184 #define ARCMSR_SYS_ERROR_MEMORY_RANGE           0x0008
  185 #define ARCMSR_SYS_ERROR_DEVICE_BASE            0x0009
  186 #define ARCMSR_SYS_ERROR_PORT_VALIDATE          0x000A
  187 
  188 /*DeviceType*/
  189 #define ARECA_SATA_RAID                         0x90000000
  190 
  191 /*FunctionCode*/
  192 #define FUNCTION_READ_RQBUFFER                  0x0801
  193 #define FUNCTION_WRITE_WQBUFFER                 0x0802
  194 #define FUNCTION_CLEAR_RQBUFFER                 0x0803
  195 #define FUNCTION_CLEAR_WQBUFFER                 0x0804
  196 #define FUNCTION_CLEAR_ALLQBUFFER               0x0805
  197 #define FUNCTION_REQUEST_RETURNCODE_3F          0x0806
  198 #define FUNCTION_SAY_HELLO                      0x0807
  199 #define FUNCTION_SAY_GOODBYE                    0x0808
  200 #define FUNCTION_FLUSH_ADAPTER_CACHE            0x0809
  201 /*
  202 ************************************************************************
  203 **        IOCTL CONTROL CODE
  204 ************************************************************************
  205 */
  206 /* ARECA IO CONTROL CODE*/
  207 #define ARCMSR_MESSAGE_READ_RQBUFFER            _IOWR('F', FUNCTION_READ_RQBUFFER, struct CMD_MESSAGE_FIELD)
  208 #define ARCMSR_MESSAGE_WRITE_WQBUFFER           _IOWR('F', FUNCTION_WRITE_WQBUFFER, struct CMD_MESSAGE_FIELD)
  209 #define ARCMSR_MESSAGE_CLEAR_RQBUFFER           _IOWR('F', FUNCTION_CLEAR_RQBUFFER, struct CMD_MESSAGE_FIELD)
  210 #define ARCMSR_MESSAGE_CLEAR_WQBUFFER           _IOWR('F', FUNCTION_CLEAR_WQBUFFER, struct CMD_MESSAGE_FIELD)
  211 #define ARCMSR_MESSAGE_CLEAR_ALLQBUFFER         _IOWR('F', FUNCTION_CLEAR_ALLQBUFFER, struct CMD_MESSAGE_FIELD)
  212 #define ARCMSR_MESSAGE_REQUEST_RETURNCODE_3F    _IOWR('F', FUNCTION_REQUEST_RETURNCODE_3F, struct CMD_MESSAGE_FIELD)
  213 #define ARCMSR_MESSAGE_SAY_HELLO                _IOWR('F', FUNCTION_SAY_HELLO, struct CMD_MESSAGE_FIELD) 
  214 #define ARCMSR_MESSAGE_SAY_GOODBYE              _IOWR('F', FUNCTION_SAY_GOODBYE, struct CMD_MESSAGE_FIELD)
  215 #define ARCMSR_MESSAGE_FLUSH_ADAPTER_CACHE      _IOWR('F', FUNCTION_FLUSH_ADAPTER_CACHE, struct CMD_MESSAGE_FIELD)
  216 
  217 /* ARECA IOCTL ReturnCode */
  218 #define ARCMSR_MESSAGE_RETURNCODE_OK                    0x00000001
  219 #define ARCMSR_MESSAGE_RETURNCODE_ERROR                 0x00000006
  220 #define ARCMSR_MESSAGE_RETURNCODE_3F                    0x0000003F
  221 #define ARCMSR_IOCTL_RETURNCODE_BUS_HANG_ON             0x00000088
  222 /* 
  223 ************************************************************************
  224 **                SPEC. for Areca HBB adapter
  225 ************************************************************************
  226 */
  227 /* ARECA HBB COMMAND for its FIRMWARE */
  228 #define ARCMSR_DRV2IOP_DOORBELL                 0x00020400    /* window of "instruction flags" from driver to iop */
  229 #define ARCMSR_DRV2IOP_DOORBELL_MASK            0x00020404
  230 #define ARCMSR_IOP2DRV_DOORBELL                 0x00020408    /* window of "instruction flags" from iop to driver */
  231 #define ARCMSR_IOP2DRV_DOORBELL_MASK            0x0002040C
  232 
  233 /* ARECA FLAG LANGUAGE */
  234 #define ARCMSR_IOP2DRV_DATA_WRITE_OK            0x00000001        /* ioctl transfer */
  235 #define ARCMSR_IOP2DRV_DATA_READ_OK             0x00000002        /* ioctl transfer */
  236 #define ARCMSR_IOP2DRV_CDB_DONE                 0x00000004
  237 #define ARCMSR_IOP2DRV_MESSAGE_CMD_DONE         0x00000008
  238 
  239 #define ARCMSR_DOORBELL_HANDLE_INT                      0x0000000F
  240 #define ARCMSR_DOORBELL_INT_CLEAR_PATTERN       0xFF00FFF0
  241 #define ARCMSR_MESSAGE_INT_CLEAR_PATTERN        0xFF00FFF7
  242 
  243 #define ARCMSR_MESSAGE_GET_CONFIG                               0x00010008      /* (ARCMSR_INBOUND_MESG0_GET_CONFIG<<16)|ARCMSR_DRV2IOP_MESSAGE_CMD_POSTED) */
  244 #define ARCMSR_MESSAGE_SET_CONFIG                               0x00020008      /* (ARCMSR_INBOUND_MESG0_SET_CONFIG<<16)|ARCMSR_DRV2IOP_MESSAGE_CMD_POSTED) */
  245 #define ARCMSR_MESSAGE_ABORT_CMD                                0x00030008      /* (ARCMSR_INBOUND_MESG0_ABORT_CMD<<16)|ARCMSR_DRV2IOP_MESSAGE_CMD_POSTED) */
  246 #define ARCMSR_MESSAGE_STOP_BGRB                                0x00040008      /* (ARCMSR_INBOUND_MESG0_STOP_BGRB<<16)|ARCMSR_DRV2IOP_MESSAGE_CMD_POSTED) */
  247 #define ARCMSR_MESSAGE_FLUSH_CACHE              0x00050008      /* (ARCMSR_INBOUND_MESG0_FLUSH_CACHE<<16)|ARCMSR_DRV2IOP_MESSAGE_CMD_POSTED) */
  248 #define ARCMSR_MESSAGE_START_BGRB                               0x00060008      /* (ARCMSR_INBOUND_MESG0_START_BGRB<<16)|ARCMSR_DRV2IOP_MESSAGE_CMD_POSTED) */
  249 #define ARCMSR_MESSAGE_START_DRIVER_MODE                0x000E0008      
  250 #define ARCMSR_MESSAGE_SET_POST_WINDOW              0x000F0008  
  251 #define ARCMSR_MESSAGE_ACTIVE_EOI_MODE              0x00100008
  252 #define ARCMSR_MESSAGE_FIRMWARE_OK                              0x80000000      /* ARCMSR_OUTBOUND_MESG1_FIRMWARE_OK */
  253 
  254 #define ARCMSR_DRV2IOP_DATA_WRITE_OK            0x00000001      /* ioctl transfer */
  255 #define ARCMSR_DRV2IOP_DATA_READ_OK             0x00000002      /* ioctl transfer */
  256 #define ARCMSR_DRV2IOP_CDB_POSTED               0x00000004
  257 #define ARCMSR_DRV2IOP_MESSAGE_CMD_POSTED       0x00000008
  258 #define ARCMSR_DRV2IOP_END_OF_INTERRUPT         0x00000010  /*  */
  259 
  260 /* data tunnel buffer between user space program and its firmware */
  261 #define ARCMSR_MSGCODE_RWBUFFER                                 0x0000fa00    /* iop msgcode_rwbuffer for message command */
  262 #define ARCMSR_IOCTL_WBUFFER                                    0x0000fe00    /* user space data to iop 128bytes */
  263 #define ARCMSR_IOCTL_RBUFFER                                    0x0000ff00    /* iop data to user space 128bytes */
  264 #define ARCMSR_HBB_BASE0_OFFSET                                 0x00000010
  265 #define ARCMSR_HBB_BASE1_OFFSET                                 0x00000018
  266 #define ARCMSR_HBB_BASE0_LEN                                    0x00021000
  267 #define ARCMSR_HBB_BASE1_LEN                                    0x00010000
  268 /* 
  269 ************************************************************************
  270 **                SPEC. for Areca HBC adapter
  271 ************************************************************************
  272 */
  273 #define ARCMSR_HBC_ISR_THROTTLING_LEVEL                 12
  274 #define ARCMSR_HBC_ISR_MAX_DONE_QUEUE                   20
  275 /* Host Interrupt Mask */
  276 #define ARCMSR_HBCMU_UTILITY_A_ISR_MASK                 0x00000001 /* When clear, the Utility_A interrupt routes to the host.*/
  277 #define ARCMSR_HBCMU_OUTBOUND_DOORBELL_ISR_MASK         0x00000004 /* When clear, the General Outbound Doorbell interrupt routes to the host.*/
  278 #define ARCMSR_HBCMU_OUTBOUND_POSTQUEUE_ISR_MASK        0x00000008 /* When clear, the Outbound Post List FIFO Not Empty interrupt routes to the host.*/
  279 #define ARCMSR_HBCMU_ALL_INTMASKENABLE                  0x0000000D /* disable all ISR */
  280 /* Host Interrupt Status */
  281 #define ARCMSR_HBCMU_UTILITY_A_ISR                      0x00000001
  282         /*
  283         ** Set when the Utility_A Interrupt bit is set in the Outbound Doorbell Register. 
  284         ** It clears by writing a 1 to the Utility_A bit in the Outbound Doorbell Clear Register or through automatic clearing (if enabled).
  285         */
  286 #define ARCMSR_HBCMU_OUTBOUND_DOORBELL_ISR              0x00000004
  287         /*
  288         ** Set if Outbound Doorbell register bits 30:1 have a non-zero
  289         ** value. This bit clears only when Outbound Doorbell bits
  290         ** 30:1 are ALL clear. Only a write to the Outbound Doorbell
  291         ** Clear register clears bits in the Outbound Doorbell register.
  292         */
  293 #define ARCMSR_HBCMU_OUTBOUND_POSTQUEUE_ISR             0x00000008
  294         /*
  295         ** Set whenever the Outbound Post List Producer/Consumer
  296         ** Register (FIFO) is not empty. It clears when the Outbound
  297         ** Post List FIFO is empty.
  298         */
  299 #define ARCMSR_HBCMU_SAS_ALL_INT                        0x00000010
  300         /*
  301         ** This bit indicates a SAS interrupt from a source external to
  302         ** the PCIe core. This bit is not maskable.
  303         */
  304 /* DoorBell*/
  305 #define ARCMSR_HBCMU_DRV2IOP_DATA_WRITE_OK                      0x00000002/**/
  306 #define ARCMSR_HBCMU_DRV2IOP_DATA_READ_OK                       0x00000004/**/
  307 #define ARCMSR_HBCMU_DRV2IOP_MESSAGE_CMD_DONE                   0x00000008/*inbound message 0 ready*/
  308 #define ARCMSR_HBCMU_DRV2IOP_POSTQUEUE_THROTTLING               0x00000010/*more than 12 request completed in a time*/
  309 #define ARCMSR_HBCMU_IOP2DRV_DATA_WRITE_OK                      0x00000002/**/
  310 #define ARCMSR_HBCMU_IOP2DRV_DATA_WRITE_DOORBELL_CLEAR          0x00000002/*outbound DATA WRITE isr door bell clear*/
  311 #define ARCMSR_HBCMU_IOP2DRV_DATA_READ_OK                       0x00000004/**/
  312 #define ARCMSR_HBCMU_IOP2DRV_DATA_READ_DOORBELL_CLEAR           0x00000004/*outbound DATA READ isr door bell clear*/
  313 #define ARCMSR_HBCMU_IOP2DRV_MESSAGE_CMD_DONE                   0x00000008/*outbound message 0 ready*/
  314 #define ARCMSR_HBCMU_IOP2DRV_MESSAGE_CMD_DONE_DOORBELL_CLEAR    0x00000008/*outbound message cmd isr door bell clear*/
  315 #define ARCMSR_HBCMU_MESSAGE_FIRMWARE_OK                                0x80000000/*ARCMSR_HBCMU_MESSAGE_FIRMWARE_OK*/
  316 
  317 /* 
  318 *************************************************************
  319 **   structure for holding DMA address data 
  320 *************************************************************
  321 */
  322 #define IS_SG64_ADDR                0x01000000 /* bit24 */
  323 /*
  324 ************************************************************************************************
  325 **                            ARECA FIRMWARE SPEC
  326 ************************************************************************************************
  327 **              Usage of IOP331 adapter
  328 **              (All In/Out is in IOP331's view)
  329 **              1. Message 0 --> InitThread message and retrun code
  330 **              2. Doorbell is used for RS-232 emulation
  331 **                              inDoorBell :    bit0 -- data in ready            (DRIVER DATA WRITE OK)
  332 **                                                              bit1 -- data out has been read   (DRIVER DATA READ OK)
  333 **                              outDooeBell:    bit0 -- data out ready           (IOP331 DATA WRITE OK)
  334 **                                                              bit1 -- data in has been read    (IOP331 DATA READ OK)
  335 **              3. Index Memory Usage
  336 **                      offset 0xf00 : for RS232 out (request buffer)
  337 **                      offset 0xe00 : for RS232 in  (scratch buffer)
  338 **                      offset 0xa00 : for inbound message code msgcode_rwbuffer (driver send to IOP331)
  339 **                      offset 0xa00 : for outbound message code msgcode_rwbuffer (IOP331 send to driver)
  340 **              4. RS-232 emulation
  341 **                      Currently 128 byte buffer is used
  342 **                                1st u_int32_t : Data length (1--124)
  343 **                              Byte 4--127 : Max 124 bytes of data
  344 **              5. PostQ
  345 **              All SCSI Command must be sent through postQ:
  346 **              (inbound queue port)    Request frame must be 32 bytes aligned 
  347 **            #   bit27--bit31 => flag for post ccb 
  348 **                        #   bit0--bit26 => real address (bit27--bit31) of post arcmsr_cdb  
  349 **                                                                                                      bit31 : 0 : 256 bytes frame
  350 **                                                                                                                      1 : 512 bytes frame
  351 **                                                                                                      bit30 : 0 : normal request
  352 **                                                                                                                      1 : BIOS request
  353 **                                                  bit29 : reserved
  354 **                                                  bit28 : reserved
  355 **                                                  bit27 : reserved
  356 **  -------------------------------------------------------------------------------
  357 **              (outbount queue port)   Request reply                          
  358 **            #   bit27--bit31 => flag for reply
  359 **                        #   bit0--bit26 => real address (bit27--bit31) of reply arcmsr_cdb 
  360 **                                                                                                      bit31 : must be 0 (for this type of reply)
  361 **                                                                                                      bit30 : reserved for BIOS handshake
  362 **                                                                                                      bit29 : reserved
  363 **                                                                                                      bit28 : 0 : no error, ignore AdapStatus/DevStatus/SenseData
  364 **                                                                                                                      1 : Error, error code in AdapStatus/DevStatus/SenseData
  365 **                                                                                                      bit27 : reserved
  366 **              6. BIOS request
  367 **                      All BIOS request is the same with request from PostQ
  368 **                      Except :
  369 **                              Request frame is sent from configuration space
  370 **                                                              offset: 0x78 : Request Frame (bit30 == 1)
  371 **                                                              offset: 0x18 : writeonly to generate IRQ to IOP331
  372 **                              Completion of request:
  373 **                                                    (bit30 == 0, bit28==err flag)
  374 **              7. Definition of SGL entry (structure)
  375 **              8. Message1 Out - Diag Status Code (????)
  376 **              9. Message0 message code :
  377 **                      0x00 : NOP
  378 **                      0x01 : Get Config ->offset 0xa00 :for outbound message code msgcode_rwbuffer (IOP331 send to driver)
  379 **                                                                                              Signature             0x87974060(4)
  380 **                                                                                              Request len           0x00000200(4)
  381 **                                                                                              numbers of queue      0x00000100(4)
  382 **                                                                                              SDRAM Size            0x00000100(4)-->256 MB
  383 **                                                                                              IDE Channels          0x00000008(4)
  384 **                                                                                              vendor                40 bytes char
  385 **                                                                                              model                  8 bytes char
  386 **                                                                                              FirmVer               16 bytes char
  387 **                                                                                              Device Map            16 bytes char
  388 **      
  389 **                                      FirmwareVersion DWORD <== Added for checking of new firmware capability
  390 **                      0x02 : Set Config ->offset 0xa00 : for inbound message code msgcode_rwbuffer (driver send to IOP331)
  391 **                                                                                              Signature             0x87974063(4)
  392 **                                                                                              UPPER32 of Request Frame  (4)-->Driver Only
  393 **                      0x03 : Reset (Abort all queued Command)
  394 **                      0x04 : Stop Background Activity
  395 **                      0x05 : Flush Cache
  396 **                      0x06 : Start Background Activity (re-start if background is halted)
  397 **                      0x07 : Check If Host Command Pending (Novell May Need This Function)
  398 **                      0x08 : Set controller time ->offset 0xa00 : for inbound message code msgcode_rwbuffer (driver to IOP331)
  399 **                                                                                      byte 0 : 0xaa <-- signature
  400 **                                                                                      byte 1 : 0x55 <-- signature
  401 **                                                                                      byte 2 : year (04)
  402 **                                                                                      byte 3 : month (1..12)
  403 **                                                                                      byte 4 : date (1..31)
  404 **                                                                                      byte 5 : hour (0..23)
  405 **                                                                                      byte 6 : minute (0..59)
  406 **                                                                                      byte 7 : second (0..59)
  407 **      *********************************************************************************
  408 **      Porting Of LSI2108/2116 Based PCIE SAS/6G host raid adapter
  409 **      ==> Difference from IOP348
  410 **      <1> Message Register 0,1 (the same usage) Init Thread message and retrun code
  411 **           Inbound Message 0  (inbound_msgaddr0) : at offset 0xB0 (Scratchpad0) for inbound message code msgcode_rwbuffer (driver send to IOP)
  412 **           Inbound Message 1  (inbound_msgaddr1) : at offset 0xB4 (Scratchpad1) Out.... Diag Status Code 
  413 **           Outbound Message 0 (outbound_msgaddr0): at offset 0xB8 (Scratchpad3) Out.... Diag Status Code 
  414 **           Outbound Message 1 (outbound_msgaddr1): at offset 0xBC (Scratchpad2) for outbound message code msgcode_rwbuffer (IOP send to driver)
  415 **           <A> use doorbell to generate interrupt
  416 **
  417 **               inbound doorbell: bit3 --  inbound message 0 ready (driver to iop)
  418 **              outbound doorbell: bit3 -- outbound message 0 ready (iop to driver)
  419 **
  420 **                      a. Message1: Out - Diag Status Code (????)
  421 **
  422 **                      b. Message0: message code 
  423 **                                  0x00 : NOP
  424 **                                  0x01 : Get Config ->offset 0xB8 :for outbound message code msgcode_rwbuffer (IOP send to driver)
  425 **                                                                                                      Signature             0x87974060(4)
  426 **                                                                                                      Request len           0x00000200(4)
  427 **                                                                                                      numbers of queue      0x00000100(4)
  428 **                                                                                                      SDRAM Size            0x00000100(4)-->256 MB
  429 **                                                                                                      IDE Channels          0x00000008(4)
  430 **                                                                                                      vendor                40 bytes char
  431 **                                                                                                      model                  8 bytes char
  432 **                                                                                                      FirmVer               16 bytes char
  433 **                                                                              Device Map            16 bytes char
  434 **                                                              cfgVersion    ULONG <== Added for checking of new firmware capability
  435 **                                  0x02 : Set Config ->offset 0xB0 :for inbound message code msgcode_rwbuffer (driver send to IOP)
  436 **                                                                                                      Signature             0x87974063(4)
  437 **                                                                                                      UPPER32 of Request Frame  (4)-->Driver Only
  438 **                                  0x03 : Reset (Abort all queued Command)
  439 **                                  0x04 : Stop Background Activity
  440 **                                  0x05 : Flush Cache
  441 **                                  0x06 : Start Background Activity (re-start if background is halted)
  442 **                                  0x07 : Check If Host Command Pending (Novell May Need This Function)
  443 **                                  0x08 : Set controller time ->offset 0xB0 : for inbound message code msgcode_rwbuffer (driver to IOP)
  444 **                                                                                              byte 0 : 0xaa <-- signature
  445 **                                                                              byte 1 : 0x55 <-- signature
  446 **                                                                                              byte 2 : year (04)
  447 **                                                                                              byte 3 : month (1..12)
  448 **                                                                                              byte 4 : date (1..31)
  449 **                                                                                              byte 5 : hour (0..23)
  450 **                                                                                              byte 6 : minute (0..59)
  451 **                                                                                              byte 7 : second (0..59)
  452 **
  453 **      <2> Doorbell Register is used for RS-232 emulation
  454 **           <A> different clear register
  455 **           <B> different bit0 definition (bit0 is reserved)
  456 **
  457 **           inbound doorbell        : at offset 0x20
  458 **           inbound doorbell clear  : at offset 0x70
  459 **
  460 **           inbound doorbell        : bit0 -- reserved
  461 **                                     bit1 -- data in ready             (DRIVER DATA WRITE OK)
  462 **                                     bit2 -- data out has been read    (DRIVER DATA READ OK)
  463 **                                     bit3 -- inbound message 0 ready
  464 **                                     bit4 -- more than 12 request completed in a time
  465 **
  466 **           outbound doorbell       : at offset 0x9C
  467 **           outbound doorbell clear : at offset 0xA0
  468 **
  469 **           outbound doorbell       : bit0 -- reserved
  470 **                                     bit1 -- data out ready            (IOP DATA WRITE OK)
  471 **                                     bit2 -- data in has been read     (IOP DATA READ OK)
  472 **                                     bit3 -- outbound message 0 ready
  473 **
  474 **      <3> Index Memory Usage (Buffer Area)
  475 **           COMPORT_IN     at  0x2000: message_wbuffer  --  128 bytes (to be sent to ROC) : for RS232 in  (scratch buffer)
  476 **           COMPORT_OUT    at  0x2100: message_rbuffer  --  128 bytes (to be sent to host): for RS232 out (request buffer)
  477 **           BIOS_CFG_AREA  at  0x2200: msgcode_rwbuffer -- 1024 bytes for outbound message code msgcode_rwbuffer (IOP send to driver)
  478 **           BIOS_CFG_AREA  at  0x2200: msgcode_rwbuffer -- 1024 bytes for  inbound message code msgcode_rwbuffer (driver send to IOP)
  479 **
  480 **      <4> PostQ (Command Post Address)
  481 **          All SCSI Command must be sent through postQ:
  482 **              inbound  queue port32 at offset 0x40 , 0x41, 0x42, 0x43
  483 **              inbound  queue port64 at offset 0xC0 (lower)/0xC4 (upper)
  484 **              outbound queue port32 at offset 0x44
  485 **              outbound queue port64 at offset 0xC8 (lower)/0xCC (upper)
  486 **              <A> For 32bit queue, access low part is enough to send/receive request
  487 **                  i.e. write 0x40/0xC0, ROC will get the request with high part == 0, the
  488 **                  same for outbound queue port
  489 **              <B> For 64bit queue, if 64bit instruction is supported, use 64bit instruction
  490 **                  to post inbound request in a single instruction, and use 64bit instruction
  491 **                  to retrieve outbound request in a single instruction.
  492 **                  If in 32bit environment, when sending inbound queue, write high part first
  493 **                  then write low part. For receiving outbound request, read high part first
  494 **                  then low part, to check queue empty, ONLY check high part to be 0xFFFFFFFF.
  495 **                  If high part is 0xFFFFFFFF, DO NOT read low part, this may corrupt the
  496 **                  consistency of the FIFO. Another way to check empty is to check status flag
  497 **                  at 0x30 bit3.
  498 **              <C> Post Address IS NOT shifted (must be 16 bytes aligned)
  499 **                  For   BIOS, 16bytes aligned   is OK
  500 **                  For Driver, 32bytes alignment is recommended.
  501 **                  POST Command bit0 to bit3 is defined differently
  502 **                  ----------------------------
  503 **                  bit0:1 for PULL mode (must be 1)
  504 **                  ----------------------------
  505 **                  bit3/2/1: for arcmsr cdb size (arccdbsize)
  506 **                      000: <= 0x0080 (128)
  507 **                      001: <= 0x0100 (256)
  508 **                      010: <= 0x0180 (384)
  509 **                      011: <= 0x0200 (512)
  510 **                      100: <= 0x0280 (640)
  511 **                      101: <= 0x0300 (768)
  512 **                      110: <= 0x0300 (reserved)
  513 **                      111: <= 0x0300 (reserved)
  514 **                  -----------------------------
  515 **                  if len > 0x300 the len always set as 0x300
  516 **                  -----------------------------   
  517 **                  post addr = addr | ((len-1) >> 6) | 1
  518 **                  -----------------------------
  519 **                  page length in command buffer still required, 
  520 **
  521 **                  if page length > 3, 
  522 **                     firmware will assume more request data need to be retrieved 
  523 **
  524 **              <D> Outbound Posting
  525 **                  bit0:0 , no error, 1 with error, refer to status buffer
  526 **                  bit1:0 , reserved (will be 0)
  527 **                  bit2:0 , reserved (will be 0)
  528 **                  bit3:0 , reserved (will be 0)
  529 **                  bit63-4: Completed command address
  530 **
  531 **              <E> BIOS support, no special support is required. 
  532 **                  LSI2108 support I/O register
  533 **                  All driver functionality is supported through I/O address
  534 **
  535 **           For further spec, refer to
  536 **       \spec\lsi\2108 for Areca\2108\LSISAS2108_PG_NoEncryption.pdf : Chapter 8 (8-11/8-28)
  537 **       \spec\lsi\2108 for Areca\2108\SAS2108_RM_20.pdf              : for configuration space
  538 ************************************************************************************************
  539 */
  540 /* signature of set and get firmware config */
  541 #define ARCMSR_SIGNATURE_GET_CONFIG                 0x87974060
  542 #define ARCMSR_SIGNATURE_SET_CONFIG                 0x87974063
  543 /* message code of inbound message register */
  544 #define ARCMSR_INBOUND_MESG0_NOP                    0x00000000
  545 #define ARCMSR_INBOUND_MESG0_GET_CONFIG             0x00000001
  546 #define ARCMSR_INBOUND_MESG0_SET_CONFIG             0x00000002
  547 #define ARCMSR_INBOUND_MESG0_ABORT_CMD              0x00000003
  548 #define ARCMSR_INBOUND_MESG0_STOP_BGRB              0x00000004
  549 #define ARCMSR_INBOUND_MESG0_FLUSH_CACHE            0x00000005
  550 #define ARCMSR_INBOUND_MESG0_START_BGRB             0x00000006
  551 #define ARCMSR_INBOUND_MESG0_CHK331PENDING          0x00000007
  552 #define ARCMSR_INBOUND_MESG0_SYNC_TIMER             0x00000008
  553 /* doorbell interrupt generator */
  554 #define ARCMSR_INBOUND_DRIVER_DATA_WRITE_OK         0x00000001
  555 #define ARCMSR_INBOUND_DRIVER_DATA_READ_OK          0x00000002
  556 #define ARCMSR_OUTBOUND_IOP331_DATA_WRITE_OK        0x00000001
  557 #define ARCMSR_OUTBOUND_IOP331_DATA_READ_OK         0x00000002
  558 /* srb areca cdb flag */
  559 #define ARCMSR_SRBPOST_FLAG_SGL_BSIZE                           0x80000000
  560 #define ARCMSR_SRBPOST_FLAG_IAM_BIOS                            0x40000000
  561 #define ARCMSR_SRBREPLY_FLAG_IAM_BIOS                           0x40000000
  562 #define ARCMSR_SRBREPLY_FLAG_ERROR                                      0x10000000
  563 #define ARCMSR_SRBREPLY_FLAG_ERROR_MODE0                0x10000000
  564 #define ARCMSR_SRBREPLY_FLAG_ERROR_MODE1                        0x00000001
  565 /* outbound firmware ok */
  566 #define ARCMSR_OUTBOUND_MESG1_FIRMWARE_OK                       0x80000000
  567 /*
  568 **********************************
  569 **
  570 **********************************
  571 */
  572 /* size 8 bytes */
  573 /* 32bit Scatter-Gather list */
  574 struct SG32ENTRY {                             /* length bit 24 == 0                      */
  575     u_int32_t                                           length;    /* high 8 bit == flag,low 24 bit == length */
  576     u_int32_t                                           address;
  577 };
  578 /* size 12 bytes */
  579 /* 64bit Scatter-Gather list */
  580 struct SG64ENTRY {                             /* length bit 24 == 1                      */
  581         u_int32_t                                       length;    /* high 8 bit == flag,low 24 bit == length */
  582         u_int32_t                                       address; 
  583         u_int32_t                                       addresshigh;
  584 };
  585 struct SGENTRY_UNION {
  586         union {
  587                 struct SG32ENTRY            sg32entry;   /* 30h   Scatter gather address  */
  588                 struct SG64ENTRY            sg64entry;   /* 30h                           */
  589         }u;
  590 };
  591 /*
  592 **********************************
  593 **
  594 **********************************
  595 */
  596 struct QBUFFER {
  597         u_int32_t     data_len;
  598     u_int8_t      data[124];
  599 };
  600 /*
  601 ************************************************************************************************
  602 **      FIRMWARE INFO
  603 ************************************************************************************************
  604 */
  605 #define ARCMSR_FW_MODEL_OFFSET          15
  606 #define ARCMSR_FW_VERS_OFFSET           17
  607 #define ARCMSR_FW_DEVMAP_OFFSET         21
  608 #define ARCMSR_FW_CFGVER_OFFSET         25
  609 
  610 struct FIRMWARE_INFO {
  611         u_int32_t      signature;           /*0,00-03*/
  612         u_int32_t      request_len;         /*1,04-07*/
  613         u_int32_t      numbers_queue;       /*2,08-11*/
  614         u_int32_t      sdram_size;          /*3,12-15*/
  615         u_int32_t      ide_channels;        /*4,16-19*/
  616         char           vendor[40];          /*5,20-59*/
  617         char           model[8];            /*15,60-67*/
  618         char           firmware_ver[16];        /*17,68-83*/
  619         char           device_map[16];      /*21,84-99*/
  620     u_int32_t      cfgVersion;          /*25,100-103 Added for checking of new firmware capability*/
  621     char           cfgSerial[16];       /*26,104-119*/
  622     u_int32_t      cfgPicStatus;        /*30,120-123*/
  623 };
  624 /*   (A) For cfgVersion in FIRMWARE_INFO
  625 **        if low BYTE (byte#0) >= 3 (version 3)
  626 **        then byte#1 report the capability of the firmware can xfer in a single request
  627 **        
  628 **        byte#1
  629 **        0         256K
  630 **        1         512K
  631 **        2         1M
  632 **        3         2M
  633 **        4         4M
  634 **        5         8M
  635 **        6         16M
  636 **    (B) Byte offset 7 (Reserved1) of CDB is changed to msgPages
  637 **        Driver support new xfer method need to set this field to indicate
  638 **        large CDB block in 0x100 unit (we use 0x100 byte as one page)
  639 **        e.g. If the length of CDB including MSG header and SGL is 0x1508
  640 **        driver need to set the msgPages to 0x16
  641 **    (C) REQ_LEN_512BYTE must be used also to indicate SRB length
  642 **        e.g. CDB len      msgPages    REQ_LEN_512BYTE flag
  643 **             <= 0x100     1               0
  644 **             <= 0x200     2               1
  645 **             <= 0x300     3               1
  646 **             <= 0x400     4               1
  647 **             .
  648 **             .
  649 */
  650 
  651 /*
  652 ************************************************************************************************
  653 **    size 0x1F8 (504)
  654 ************************************************************************************************
  655 */
  656 struct ARCMSR_CDB {
  657         u_int8_t        Bus;              /* 00h   should be 0            */
  658         u_int8_t        TargetID;         /* 01h   should be 0--15        */
  659         u_int8_t        LUN;              /* 02h   should be 0--7         */
  660         u_int8_t        Function;         /* 03h   should be 1            */
  661         
  662         u_int8_t        CdbLength;        /* 04h   not used now           */
  663         u_int8_t        sgcount;          /* 05h                          */
  664         u_int8_t        Flags;            /* 06h                          */
  665 #define ARCMSR_CDB_FLAG_SGL_BSIZE               0x01    /* bit 0: 0(256) / 1(512) bytes         */
  666 #define ARCMSR_CDB_FLAG_BIOS                    0x02    /* bit 1: 0(from driver) / 1(from BIOS) */
  667 #define ARCMSR_CDB_FLAG_WRITE                   0x04    /* bit 2: 0(Data in) / 1(Data out)      */
  668 #define ARCMSR_CDB_FLAG_SIMPLEQ                 0x00    /* bit 4/3 ,00 : simple Q,01 : head of Q,10 : ordered Q */
  669 #define ARCMSR_CDB_FLAG_HEADQ                   0x08
  670 #define ARCMSR_CDB_FLAG_ORDEREDQ                0x10
  671         u_int8_t        msgPages;         /* 07h                          */
  672         
  673         u_int32_t       Context;          /* 08h   Address of this request */
  674         u_int32_t       DataLength;       /* 0ch   not used now           */
  675         
  676         u_int8_t        Cdb[16];          /* 10h   SCSI CDB               */
  677         /*
  678         ********************************************************
  679         **Device Status : the same from SCSI bus if error occur 
  680         ** SCSI bus status codes.
  681         ********************************************************
  682         */
  683         u_int8_t        DeviceStatus;     /* 20h   if error                */
  684 #define SCSISTAT_GOOD                           0x00
  685 #define SCSISTAT_CHECK_CONDITION                0x02
  686 #define SCSISTAT_CONDITION_MET                  0x04
  687 #define SCSISTAT_BUSY                           0x08
  688 #define SCSISTAT_INTERMEDIATE                   0x10
  689 #define SCSISTAT_INTERMEDIATE_COND_MET          0x14
  690 #define SCSISTAT_RESERVATION_CONFLICT           0x18
  691 #define SCSISTAT_COMMAND_TERMINATED             0x22
  692 #define SCSISTAT_QUEUE_FULL                     0x28
  693 #define ARCMSR_DEV_SELECT_TIMEOUT                       0xF0
  694 #define ARCMSR_DEV_ABORTED                                      0xF1
  695 #define ARCMSR_DEV_INIT_FAIL                            0xF2
  696         
  697         u_int8_t        SenseData[15];    /* 21h   output                  */        
  698         
  699         union {
  700                 struct SG32ENTRY                sg32entry[ARCMSR_MAX_SG_ENTRIES];        /* 30h   Scatter gather address  */
  701                 struct SG64ENTRY                sg64entry[ARCMSR_MAX_SG_ENTRIES];        /* 30h                           */
  702         } u;
  703 };
  704 /*
  705 *********************************************************************
  706 **                   Command Control Block (SrbExtension)
  707 ** SRB must be not cross page boundary,and the order from offset 0
  708 **         structure describing an ATA disk request
  709 **             this SRB length must be 32 bytes boundary
  710 *********************************************************************
  711 */
  712 struct CommandControlBlock {
  713         struct ARCMSR_CDB                       arcmsr_cdb;                             /* 0  -503 (size of CDB=504): arcmsr messenger scsi command descriptor size 504 bytes */
  714         u_int32_t                                       cdb_shifted_phyaddr;    /* 504-507 */
  715         u_int32_t                                       arc_cdb_size;                   /* 508-511 */
  716         /*  ======================512+32 bytes============================  */
  717 #if defined(__x86_64__) || defined(__amd64__) || defined(__ia64__) || defined(__sparc64__) || defined(__powerpc__)
  718         union ccb                                       *pccb;                                  /* 512-515 516-519 pointer of freebsd scsi command */
  719         struct AdapterControlBlock      *acb;                                   /* 520-523 524-527 */
  720         bus_dmamap_t                            dm_segs_dmamap;                 /* 528-531 532-535 */
  721         u_int16_t                               srb_flags;                              /* 536-537 */
  722         u_int16_t                                       startdone;                /* 538-539 */
  723         u_int32_t                                       reserved2;                /* 540-543 */
  724 #else
  725         union ccb                                       *pccb;                    /* 512-515 pointer of freebsd scsi command */
  726         struct AdapterControlBlock      *acb;                     /* 516-519 */
  727         bus_dmamap_t                            dm_segs_dmamap;           /* 520-523 */
  728         u_int16_t                               srb_flags;                /* 524-525 */
  729         u_int16_t                                       startdone;                /* 526-527 */
  730         u_int32_t                                       reserved2[4];             /* 528-531 532-535 536-539 540-543 */
  731 #endif
  732     /*  ==========================================================  */
  733 /*      struct  callout                         ccb_callout; */
  734 };
  735 /*      srb_flags */
  736 #define         SRB_FLAG_READ                           0x0000
  737 #define         SRB_FLAG_WRITE                          0x0001
  738 #define         SRB_FLAG_ERROR                          0x0002
  739 #define         SRB_FLAG_FLUSHCACHE                     0x0004
  740 #define         SRB_FLAG_MASTER_ABORTED         0x0008
  741 #define         SRB_FLAG_DMAVALID                       0x0010
  742 #define         SRB_FLAG_DMACONSISTENT          0x0020
  743 #define         SRB_FLAG_DMAWRITE                       0x0040
  744 #define         SRB_FLAG_PKTBIND                        0x0080
  745 /*      startdone */
  746 #define         ARCMSR_SRB_DONE                         0x0000
  747 #define         ARCMSR_SRB_UNBUILD                      0x0000
  748 #define         ARCMSR_SRB_TIMEOUT                      0x1111
  749 #define         ARCMSR_SRB_RETRY                        0x2222
  750 #define         ARCMSR_SRB_START                        0x55AA
  751 #define         ARCMSR_SRB_PENDING                      0xAA55
  752 #define         ARCMSR_SRB_RESET                        0xA5A5
  753 #define         ARCMSR_SRB_ABORTED                      0x5A5A
  754 #define         ARCMSR_SRB_ILLEGAL                      0xFFFF
  755 /*
  756 *********************************************************************
  757 **                 Adapter Control Block
  758 *********************************************************************
  759 */
  760 #define ACB_ADAPTER_TYPE_A            0x00000001                        /* hba I IOP */
  761 #define ACB_ADAPTER_TYPE_B            0x00000002                        /* hbb M IOP */
  762 #define ACB_ADAPTER_TYPE_C            0x00000004                        /* hbc L IOP */
  763 #define ACB_ADAPTER_TYPE_D            0x00000008                        /* hbd A IOP */
  764 
  765 struct AdapterControlBlock {
  766         u_int32_t                                       adapter_type;               /* adapter A,B..... */
  767         
  768         bus_space_tag_t                         btag[2];
  769         bus_space_handle_t                      bhandle[2];
  770         bus_dma_tag_t                           parent_dmat;
  771         bus_dma_tag_t                           dm_segs_dmat;               /* dmat for buffer I/O */  
  772         bus_dma_tag_t                           srb_dmat;                   /* dmat for freesrb */
  773         bus_dmamap_t                            srb_dmamap;
  774         device_t                                        pci_dev;
  775 #if __FreeBSD_version < 503000
  776         dev_t                                           ioctl_dev;
  777 #else
  778         struct cdev *                           ioctl_dev;
  779 #endif
  780         int                                                     pci_unit;
  781         
  782         struct resource *                       sys_res_arcmsr[2];
  783         struct resource *                       irqres;
  784         void *                                          ih;                         /* interrupt handle */
  785         
  786         /* Hooks into the CAM XPT */
  787         struct                                          cam_sim *psim;
  788         struct                                          cam_path *ppath;
  789         u_int8_t *                                      uncacheptr;
  790         unsigned long                           vir2phy_offset;
  791         union   {
  792                 unsigned long                   phyaddr;
  793                 struct {
  794                                 u_int32_t               phyadd_low;
  795                                 u_int32_t               phyadd_high;
  796                 }B;
  797         }                                                       srb_phyaddr;
  798 //      unsigned long                           srb_phyaddr;
  799         /* Offset is used in making arc cdb physical to virtual calculations */
  800         u_int32_t                                       outbound_int_enable;
  801         
  802         struct MessageUnit_UNION *      pmu;                        /* message unit ATU inbound base address0 */
  803         
  804         u_int8_t                                        adapter_index;              /*  */
  805         u_int8_t                                        irq;
  806         u_int16_t                                       acb_flags;                  /*  */
  807         
  808         struct CommandControlBlock *    psrb_pool[ARCMSR_MAX_FREESRB_NUM];     /* serial srb pointer array */
  809         struct CommandControlBlock *    srbworkingQ[ARCMSR_MAX_FREESRB_NUM];   /* working srb pointer array */
  810         int32_t                                         workingsrb_doneindex;                  /* done srb array index */
  811         int32_t                                         workingsrb_startindex;                 /* start srb array index  */
  812         int32_t                                         srboutstandingcount;
  813         
  814         u_int8_t                                        rqbuffer[ARCMSR_MAX_QBUFFER];          /* data collection buffer for read from 80331 */
  815         u_int32_t                                       rqbuf_firstindex;                      /* first of read buffer  */
  816         u_int32_t                                       rqbuf_lastindex;                       /* last of read buffer   */
  817         
  818         u_int8_t                                        wqbuffer[ARCMSR_MAX_QBUFFER];          /* data collection buffer for write to 80331  */
  819         u_int32_t                                       wqbuf_firstindex;                      /* first of write buffer */
  820         u_int32_t                                       wqbuf_lastindex;                       /* last of write buffer  */
  821         
  822         arcmsr_lock_t                           workingQ_done_lock;
  823         arcmsr_lock_t                           workingQ_start_lock;
  824         arcmsr_lock_t                           qbuffer_lock;
  825         
  826         u_int8_t                                        devstate[ARCMSR_MAX_TARGETID][ARCMSR_MAX_TARGETLUN]; /* id0 ..... id15,lun0...lun7 */
  827         u_int32_t                                       num_resets;
  828         u_int32_t                                       num_aborts;
  829         u_int32_t                                       firm_request_len;                       /*1,04-07*/
  830         u_int32_t                                       firm_numbers_queue;         /*2,08-11*/
  831         u_int32_t                                       firm_sdram_size;            /*3,12-15*/
  832         u_int32_t                                       firm_ide_channels;          /*4,16-19*/
  833         u_int32_t                                       firm_cfg_version;
  834         char                                            firm_model[12];             /*15,60-67*/
  835         char                                            firm_version[20];           /*17,68-83*/
  836         char                                            device_map[20];                         /*21,84-99 */
  837         struct  callout                         devmap_callout;
  838 };/* HW_DEVICE_EXTENSION */
  839 /* acb_flags */
  840 #define ACB_F_SCSISTOPADAPTER           0x0001
  841 #define ACB_F_MSG_STOP_BGRB             0x0002              /* stop RAID background rebuild */
  842 #define ACB_F_MSG_START_BGRB            0x0004              /* stop RAID background rebuild */
  843 #define ACB_F_IOPDATA_OVERFLOW          0x0008              /* iop ioctl data rqbuffer overflow */
  844 #define ACB_F_MESSAGE_WQBUFFER_CLEARED  0x0010              /* ioctl clear wqbuffer */
  845 #define ACB_F_MESSAGE_RQBUFFER_CLEARED  0x0020              /* ioctl clear rqbuffer */
  846 #define ACB_F_MESSAGE_WQBUFFER_READ     0x0040
  847 #define ACB_F_BUS_RESET                 0x0080
  848 #define ACB_F_IOP_INITED                0x0100              /* iop init */
  849 #define ACB_F_MAPFREESRB_FAILD              0x0200              /* arcmsr_map_freesrb faild */
  850 #define ACB_F_CAM_DEV_QFRZN             0x0400
  851 #define ACB_F_BUS_HANG_ON               0x0800              /* need hardware reset bus */
  852 #define ACB_F_SRB_FUNCTION_POWER        0x1000
  853 /* devstate */
  854 #define ARECA_RAID_GONE                         0x55
  855 #define ARECA_RAID_GOOD                         0xaa
  856 /*
  857 *********************************************************************
  858 ** Message Unit structure
  859 *********************************************************************
  860 */
  861 struct HBA_MessageUnit
  862 {
  863         u_int32_t                               resrved0[4];            /*0000 000F*/
  864         u_int32_t                               inbound_msgaddr0;           /*0010 0013*/
  865         u_int32_t                               inbound_msgaddr1;           /*0014 0017*/
  866         u_int32_t                               outbound_msgaddr0;          /*0018 001B*/
  867         u_int32_t                               outbound_msgaddr1;          /*001C 001F*/
  868         u_int32_t                               inbound_doorbell;           /*0020 0023*/
  869         u_int32_t                               inbound_intstatus;          /*0024 0027*/
  870         u_int32_t                               inbound_intmask;            /*0028 002B*/
  871         u_int32_t                               outbound_doorbell;          /*002C 002F*/
  872         u_int32_t                               outbound_intstatus;         /*0030 0033*/
  873         u_int32_t                               outbound_intmask;           /*0034 0037*/
  874         u_int32_t                               reserved1[2];           /*0038 003F*/
  875         u_int32_t                               inbound_queueport;          /*0040 0043*/
  876         u_int32_t                               outbound_queueport;     /*0044 0047*/
  877         u_int32_t                               reserved2[2];           /*0048 004F*/
  878         u_int32_t                               reserved3[492];         /*0050 07FF ......local_buffer 492*/
  879         u_int32_t                               reserved4[128];         /*0800 09FF                    128*/
  880         u_int32_t                               msgcode_rwbuffer[256];  /*0a00 0DFF                    256*/
  881         u_int32_t                               message_wbuffer[32];    /*0E00 0E7F                     32*/
  882         u_int32_t                               reserved5[32];          /*0E80 0EFF                     32*/
  883         u_int32_t                               message_rbuffer[32];    /*0F00 0F7F                     32*/
  884         u_int32_t                               reserved6[32];          /*0F80 0FFF                     32*/
  885 };
  886 /*
  887 *********************************************************************
  888 ** 
  889 *********************************************************************
  890 */
  891 struct HBB_DOORBELL
  892 {
  893         u_int8_t                                doorbell_reserved[ARCMSR_DRV2IOP_DOORBELL]; /*reserved */
  894         u_int32_t                               drv2iop_doorbell;          /*offset 0x00020400:00,01,02,03: window of "instruction flags" from driver to iop */
  895         u_int32_t                               drv2iop_doorbell_mask;     /*                  04,05,06,07: doorbell mask */
  896         u_int32_t                               iop2drv_doorbell;          /*                  08,09,10,11: window of "instruction flags" from iop to driver */
  897         u_int32_t                               iop2drv_doorbell_mask;     /*                  12,13,14,15: doorbell mask */
  898 };
  899 /*
  900 *********************************************************************
  901 ** 
  902 *********************************************************************
  903 */
  904 struct HBB_RWBUFFER
  905 {
  906         u_int8_t                                message_reserved0[ARCMSR_MSGCODE_RWBUFFER];   /*reserved */
  907         u_int32_t                               msgcode_rwbuffer[256];      /*offset 0x0000fa00:   0,   1,   2,   3,...,1023: message code read write 1024bytes */
  908         u_int32_t                               message_wbuffer[32];        /*offset 0x0000fe00:1024,1025,1026,1027,...,1151: user space data to iop 128bytes */
  909         u_int32_t                               message_reserved1[32];      /*                  1152,1153,1154,1155,...,1279: message reserved*/
  910         u_int32_t                               message_rbuffer[32];        /*offset 0x0000ff00:1280,1281,1282,1283,...,1407: iop data to user space 128bytes */ 
  911 };
  912 /*
  913 *********************************************************************
  914 ** 
  915 *********************************************************************
  916 */
  917 struct HBB_MessageUnit
  918 {
  919         u_int32_t                               post_qbuffer[ARCMSR_MAX_HBB_POSTQUEUE];       /* post queue buffer for iop */
  920         u_int32_t                               done_qbuffer[ARCMSR_MAX_HBB_POSTQUEUE];       /* done queue buffer for iop */
  921         int32_t                                 postq_index;                                  /* post queue index */
  922         int32_t                                 doneq_index;                                                               /* done queue index */
  923         struct HBB_DOORBELL    *hbb_doorbell;
  924         struct HBB_RWBUFFER    *hbb_rwbuffer;
  925 };
  926 
  927 /*
  928 *********************************************************************
  929 ** 
  930 *********************************************************************
  931 */
  932 struct HBC_MessageUnit {
  933         u_int32_t       message_unit_status;                        /*0000 0003*/
  934         u_int32_t       slave_error_attribute;                      /*0004 0007*/
  935         u_int32_t       slave_error_address;                        /*0008 000B*/
  936         u_int32_t       posted_outbound_doorbell;                       /*000C 000F*/
  937         u_int32_t       master_error_attribute;                     /*0010 0013*/
  938         u_int32_t       master_error_address_low;                       /*0014 0017*/
  939         u_int32_t       master_error_address_high;                      /*0018 001B*/
  940         u_int32_t       hcb_size;                                   /*001C 001F size of the PCIe window used for HCB_Mode accesses*/
  941         u_int32_t       inbound_doorbell;                               /*0020 0023*/
  942         u_int32_t       diagnostic_rw_data;                             /*0024 0027*/
  943         u_int32_t       diagnostic_rw_address_low;                      /*0028 002B*/
  944         u_int32_t       diagnostic_rw_address_high;                     /*002C 002F*/
  945         u_int32_t       host_int_status;                                /*0030 0033 host interrupt status*/
  946         u_int32_t       host_int_mask;                                  /*0034 0037 host interrupt mask*/
  947         u_int32_t       dcr_data;                                       /*0038 003B*/
  948         u_int32_t   dcr_address;                                /*003C 003F*/
  949         u_int32_t   inbound_queueport;                          /*0040 0043 port32 host inbound queue port*/
  950         u_int32_t   outbound_queueport;                         /*0044 0047 port32 host outbound queue port*/
  951         u_int32_t   hcb_pci_address_low;                        /*0048 004B*/
  952     u_int32_t   hcb_pci_address_high;                       /*004C 004F*/
  953         u_int32_t   iop_int_status;                             /*0050 0053*/
  954         u_int32_t   iop_int_mask;                               /*0054 0057*/
  955     u_int32_t   iop_inbound_queue_port;                     /*0058 005B*/
  956     u_int32_t   iop_outbound_queue_port;                    /*005C 005F*/
  957     u_int32_t   inbound_free_list_index;                    /*0060 0063 inbound free list producer consumer index*/
  958     u_int32_t   inbound_post_list_index;                    /*0064 0067 inbound post list producer consumer index*/
  959     u_int32_t   outbound_free_list_index;                   /*0068 006B outbound free list producer consumer index*/
  960     u_int32_t   outbound_post_list_index;                   /*006C 006F outbound post list producer consumer index*/
  961     u_int32_t   inbound_doorbell_clear;                     /*0070 0073*/
  962     u_int32_t   i2o_message_unit_control;                   /*0074 0077*/
  963     u_int32_t   last_used_message_source_address_low;       /*0078 007B*/
  964     u_int32_t   last_used_message_source_address_high;          /*007C 007F*/
  965     u_int32_t   pull_mode_data_byte_count[4];               /*0080 008F pull mode data byte count0..count7*/
  966     u_int32_t   message_dest_address_index;                 /*0090 0093*/
  967     u_int32_t   done_queue_not_empty_int_counter_timer;     /*0094 0097*/
  968     u_int32_t   utility_A_int_counter_timer;                /*0098 009B*/
  969     u_int32_t   outbound_doorbell;                          /*009C 009F*/
  970     u_int32_t   outbound_doorbell_clear;                    /*00A0 00A3*/
  971     u_int32_t   message_source_address_index;               /*00A4 00A7 message accelerator source address consumer producer index*/
  972     u_int32_t   message_done_queue_index;                   /*00A8 00AB message accelerator completion queue consumer producer index*/
  973     u_int32_t   reserved0;                                  /*00AC 00AF*/
  974     u_int32_t   inbound_msgaddr0;                           /*00B0 00B3 scratchpad0*/
  975     u_int32_t   inbound_msgaddr1;                           /*00B4 00B7 scratchpad1*/
  976     u_int32_t   outbound_msgaddr0;                          /*00B8 00BB scratchpad2*/
  977     u_int32_t   outbound_msgaddr1;                          /*00BC 00BF scratchpad3*/
  978     u_int32_t   inbound_queueport_low;                      /*00C0 00C3 port64 host inbound queue port low*/
  979     u_int32_t   inbound_queueport_high;                     /*00C4 00C7 port64 host inbound queue port high*/
  980     u_int32_t   outbound_queueport_low;                     /*00C8 00CB port64 host outbound queue port low*/
  981     u_int32_t   outbound_queueport_high;                    /*00CC 00CF port64 host outbound queue port high*/
  982     u_int32_t   iop_inbound_queue_port_low;                 /*00D0 00D3*/
  983     u_int32_t   iop_inbound_queue_port_high;                /*00D4 00D7*/
  984     u_int32_t   iop_outbound_queue_port_low;                /*00D8 00DB*/
  985     u_int32_t   iop_outbound_queue_port_high;               /*00DC 00DF*/
  986     u_int32_t   message_dest_queue_port_low;                /*00E0 00E3 message accelerator destination queue port low*/
  987     u_int32_t   message_dest_queue_port_high;               /*00E4 00E7 message accelerator destination queue port high*/
  988     u_int32_t   last_used_message_dest_address_low;         /*00E8 00EB last used message accelerator destination address low*/
  989     u_int32_t   last_used_message_dest_address_high;        /*00EC 00EF last used message accelerator destination address high*/
  990     u_int32_t   message_done_queue_base_address_low;        /*00F0 00F3 message accelerator completion queue base address low*/
  991     u_int32_t   message_done_queue_base_address_high;       /*00F4 00F7 message accelerator completion queue base address high*/
  992     u_int32_t   host_diagnostic;                            /*00F8 00FB*/
  993     u_int32_t   write_sequence;                             /*00FC 00FF*/
  994     u_int32_t   reserved1[34];                              /*0100 0187*/
  995     u_int32_t   reserved2[1950];                            /*0188 1FFF*/
  996     u_int32_t   message_wbuffer[32];                        /*2000 207F*/
  997     u_int32_t   reserved3[32];                              /*2080 20FF*/
  998     u_int32_t   message_rbuffer[32];                        /*2100 217F*/
  999     u_int32_t   reserved4[32];                              /*2180 21FF*/
 1000     u_int32_t   msgcode_rwbuffer[256];                      /*2200 23FF*/
 1001 };
 1002 
 1003 /*
 1004 *********************************************************************
 1005 ** 
 1006 *********************************************************************
 1007 */
 1008 struct MessageUnit_UNION
 1009 {
 1010         union   {
 1011                 struct HBA_MessageUnit                          hbamu;
 1012                 struct HBB_MessageUnit                          hbbmu;
 1013         struct HBC_MessageUnit                  hbcmu;
 1014         } muu;
 1015 };
 1016 
 1017 /*
 1018 *************************************************************
 1019 *************************************************************
 1020 */
 1021 struct SENSE_DATA {
 1022     u_int8_t    ErrorCode:7;
 1023     u_int8_t    Valid:1;
 1024     u_int8_t    SegmentNumber;
 1025     u_int8_t    SenseKey:4;
 1026     u_int8_t    Reserved:1;
 1027     u_int8_t    IncorrectLength:1;
 1028     u_int8_t    EndOfMedia:1;
 1029     u_int8_t    FileMark:1;
 1030     u_int8_t    Information[4];
 1031     u_int8_t    AdditionalSenseLength;
 1032     u_int8_t    CommandSpecificInformation[4];
 1033     u_int8_t    AdditionalSenseCode;
 1034     u_int8_t    AdditionalSenseCodeQualifier;
 1035     u_int8_t    FieldReplaceableUnitCode;
 1036     u_int8_t    SenseKeySpecific[3];
 1037 };
 1038 /* 
 1039 **********************************
 1040 **  Peripheral Device Type definitions 
 1041 **********************************
 1042 */
 1043 #define SCSI_DASD                       0x00       /* Direct-access Device         */
 1044 #define SCSI_SEQACESS           0x01       /* Sequential-access device     */
 1045 #define SCSI_PRINTER            0x02       /* Printer device               */
 1046 #define SCSI_PROCESSOR          0x03       /* Processor device             */
 1047 #define SCSI_WRITEONCE          0x04       /* Write-once device            */
 1048 #define SCSI_CDROM                      0x05       /* CD-ROM device                */
 1049 #define SCSI_SCANNER            0x06       /* Scanner device               */
 1050 #define SCSI_OPTICAL            0x07       /* Optical memory device        */
 1051 #define SCSI_MEDCHGR            0x08       /* Medium changer device        */
 1052 #define SCSI_COMM                       0x09       /* Communications device        */
 1053 #define SCSI_NODEV                      0x1F       /* Unknown or no device type    */
 1054 /*
 1055 ************************************************************************************************************
 1056 **                                       @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
 1057 **                                                        80331 PCI-to-PCI Bridge
 1058 **                                                        PCI Configuration Space 
 1059 **                              
 1060 **                                       @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
 1061 **                                                          Programming Interface
 1062 **                                                        ========================
 1063 **                                          Configuration Register Address Space Groupings and Ranges
 1064 **                                       =============================================================
 1065 **                                               Register Group                      Configuration  Offset
 1066 **                                       -------------------------------------------------------------
 1067 **                                          Standard PCI Configuration                      00-3Fh
 1068 **                                       -------------------------------------------------------------
 1069 **                                           Device Specific Registers                      40-A7h
 1070 **                                       -------------------------------------------------------------
 1071 **                                                 Reserved                                 A8-CBh
 1072 **                                       -------------------------------------------------------------
 1073 **                                            Enhanced Capability List                      CC-FFh
 1074 ** ==========================================================================================================
 1075 **                         Standard PCI [Type 1] Configuration Space Address Map
 1076 ** **********************************************************************************************************
 1077 ** |    Byte 3              |         Byte 2         |        Byte 1          |       Byte 0              |   Configu-ration Byte Offset
 1078 ** ----------------------------------------------------------------------------------------------------------
 1079 ** |                    Device ID                    |                     Vendor ID                      | 00h
 1080 ** ----------------------------------------------------------------------------------------------------------
 1081 ** |                 Primary Status                  |                  Primary Command                   | 04h
 1082 ** ----------------------------------------------------------------------------------------------------------
 1083 ** |                   Class Code                                             |        RevID              | 08h
 1084 ** ----------------------------------------------------------------------------------------------------------
 1085 ** |        reserved        |      Header Type       |      Primary MLT       |      Primary CLS          | 0Ch
 1086 ** ----------------------------------------------------------------------------------------------------------
 1087 ** |                                             Reserved                                                 | 10h
 1088 ** ----------------------------------------------------------------------------------------------------------
 1089 ** |                                             Reserved                                                 | 14h
 1090 ** ----------------------------------------------------------------------------------------------------------
 1091 ** |     Secondary MLT      | Subordinate Bus Number |  Secondary Bus Number  |     Primary Bus Number    | 18h
 1092 ** ----------------------------------------------------------------------------------------------------------
 1093 ** |                 Secondary Status                |       I/O Limit        |        I/O Base           | 1Ch
 1094 ** ----------------------------------------------------------------------------------------------------------
 1095 ** |      Non-prefetchable Memory Limit Address      |       Non-prefetchable Memory Base Address         | 20h
 1096 ** ----------------------------------------------------------------------------------------------------------
 1097 ** |        Prefetchable Memory Limit Address        |           Prefetchable Memory Base Address         | 24h
 1098 ** ----------------------------------------------------------------------------------------------------------
 1099 ** |                          Prefetchable Memory Base Address Upper 32 Bits                              | 28h
 1100 ** ----------------------------------------------------------------------------------------------------------
 1101 ** |                          Prefetchable Memory Limit Address Upper 32 Bits                             | 2Ch
 1102 ** ----------------------------------------------------------------------------------------------------------
 1103 ** |             I/O Limit Upper 16 Bits             |                 I/O Base Upper 16                  | 30h
 1104 ** ----------------------------------------------------------------------------------------------------------
 1105 ** |                                Reserved                                  |   Capabilities Pointer    | 34h
 1106 ** ----------------------------------------------------------------------------------------------------------
 1107 ** |                                             Reserved                                                 | 38h
 1108 ** ----------------------------------------------------------------------------------------------------------
 1109 ** |                   Bridge Control                |  Primary Interrupt Pin | Primary Interrupt Line    | 3Ch
 1110 **=============================================================================================================
 1111 */
 1112 /*
 1113 **=============================================================================================================
 1114 **  0x03-0x00 : 
 1115 ** Bit       Default             Description
 1116 **31:16       0335h            Device ID (DID): Indicates the unique device ID that is assigned to bridge by the PCI SIG.
 1117 **                             ID is unique per product speed as indicated.
 1118 **15:00       8086h            Vendor ID (VID): 16-bit field which indicates that Intel is the vendor.
 1119 **=============================================================================================================
 1120 */
 1121 #define     ARCMSR_PCI2PCI_VENDORID_REG                  0x00    /*word*/
 1122 #define     ARCMSR_PCI2PCI_DEVICEID_REG                  0x02    /*word*/
 1123 /*
 1124 **==============================================================================
 1125 **  0x05-0x04 : command register 
 1126 ** Bit       Default                           Description
 1127 **15:11        00h                                           Reserved
 1128 ** 10          0                                           Interrupt Disable: Disables/Enables the generation of Interrupts on the primary bus. 
 1129 **                                                                            The bridge does not support interrupts.
 1130 ** 09          0                                                 FB2B Enable: Enables/Disables the generation of fast back to back 
 1131 **                                                                              transactions on the primary bus. 
 1132 **                                                                            The bridge does not generate fast back to back 
 1133 **                                                                              transactions on the primary bus.
 1134 ** 08          0                                          SERR# Enable (SEE): Enables primary bus SERR# assertions.
 1135 **                                                                            0=The bridge does not assert P_SERR#.
 1136 **                                                                            1=The bridge may assert P_SERR#, subject to other programmable criteria.
 1137 ** 07          0                                    Wait Cycle Control (WCC): Always returns 0bzero indicating 
 1138 **                                                                              that bridge does not perform address or data stepping,
 1139 ** 06          0                                 Parity Error Response (PER): Controls bridge response to a detected primary bus parity error.
 1140 **                                                                            0=When a data parity error is detected bridge does not assert S_PERR#. 
 1141 **                                                                                Also bridge does not assert P_SERR# in response to 
 1142 **                                                                                      a detected address or attribute parity error.
 1143 **                                                                            1=When a data parity error is detected bridge asserts S_PERR#. 
 1144 **                                                                                The bridge also asserts P_SERR# 
 1145 **                                                                                      (when enabled globally via bit(8) of this register) 
 1146 **                                                                                      in response to a detected address or attribute parity error.
 1147 ** 05          0                  VGA Palette Snoop Enable (VGA_PSE): Controls bridge response to VGA-compatible palette write transactions. 
 1148 **                                                                    VGA palette write transactions are I/O transactions
 1149 **                                                                               whose address bits are: P_AD[9:0] equal to 3C6h, 3C8h or 3C9h
 1150 **                                                                    P_AD[15:10] are not decoded (i.e. aliases are claimed), 
 1151 **                                                                              or are fully decoding 
 1152 **                                                                              (i.e., must be all 0's depending upon the VGA 
 1153 **                                                                              aliasing bit in the Bridge Control Register, offset 3Eh.
 1154 **                                                                    P_AD[31:16] equal to 0000h
 1155 **                                                                    0=The bridge ignores VGA palette write transactions, 
 1156 **                                                                              unless decoded by the standard I/O address range window.
 1157 **                                                                    1=The bridge responds to VGA palette write transactions 
 1158 **                                                                              with medium DEVSEL# timing and forwards them to the secondary bus.
 1159 ** 04          0   Memory Write and Invalidate Enable (MWIE): The bridge does not promote MW transactions to MWI transactions. 
 1160 **                                                            MWI transactions targeting resources on the opposite side of the bridge, 
 1161 **                                                                              however, are forwarded as MWI transactions.
 1162 ** 03          0                  Special Cycle Enable (SCE): The bridge ignores special cycle transactions. 
 1163 **                                                            This bit is read only and always returns 0 when read
 1164 ** 02          0                     Bus Master Enable (BME): Enables bridge to initiate memory and I/O transactions on the primary interface.
 1165 **                                                            Initiation of configuration transactions is not affected by the state of this bit.
 1166 **                                                            0=The bridge does not initiate memory or I/O transactions on the primary interface.
 1167 **                                                            1=The bridge is enabled to function as an initiator on the primary interface.
 1168 ** 01          0                   Memory Space Enable (MSE): Controls target response to memory transactions on the primary interface.
 1169 **                                                            0=The bridge target response to memory transactions on the primary interface is disabled.
 1170 **                                                            1=The bridge target response to memory transactions on the primary interface is enabled.
 1171 ** 00          0                     I/O Space Enable (IOSE): Controls target response to I/O transactions on the primary interface.
 1172 **                                                            0=The bridge target response to I/O transactions on the primary interface is disabled.
 1173 **                                                            1=The bridge target response to I/O transactions on the primary interface is enabled.
 1174 **==============================================================================
 1175 */
 1176 #define     ARCMSR_PCI2PCI_PRIMARY_COMMAND_REG          0x04    /*word*/
 1177 #define     PCI_DISABLE_INTERRUPT                                       0x0400
 1178 /*
 1179 **==============================================================================
 1180 **  0x07-0x06 : status register 
 1181 ** Bit       Default                       Description
 1182 ** 15          0                       Detected Parity Error: The bridge sets this bit to a 1b whenever it detects an address, 
 1183 **                                                                      attribute or data parity error. 
 1184 **                                                            This bit is set regardless of the state of the PER bit in the command register.
 1185 ** 14          0                       Signaled System Error: The bridge sets this bit to a 1b whenever it asserts SERR# on the primary bus.
 1186 ** 13          0                       Received Master Abort: The bridge sets this bit to a 1b when, 
 1187 **                                                                      acting as the initiator on the primary bus, 
 1188 **                                                                      its transaction (with the exception of special cycles) 
 1189 **                                                                      has been terminated with a Master Abort.
 1190 ** 12          0                       Received Target Abort: The bridge sets this bit to a 1b when, 
 1191 **                                                                      acting as the initiator on the primary bus, 
 1192 **                                                                      its transaction has been terminated with a Target Abort.
 1193 ** 11          0                       Signaled Target Abort: The bridge sets this bit to a 1b when it, 
 1194 **                                                                      as the target of a transaction, terminates it with a Target Abort. 
 1195 **                                                            In PCI-X mode this bit is also set when it forwards a SCM with a target abort error code.
 1196 ** 10:09       01                             DEVSEL# Timing: Indicates slowest response to a non-configuration command on the primary interface. 
 1197 **                                                            Returns ˇ§01bˇ¨ when read, indicating that bridge responds no slower than with medium timing.
 1198 ** 08          0                    Master Data Parity Error: The bridge sets this bit to a 1b when all of the following conditions are true: 
 1199 **                                                                      The bridge is the current master on the primary bus
 1200 **                                                            S_PERR# is detected asserted or is asserted by bridge
 1201 **                                                            The Parity Error Response bit is set in the Command register
 1202 ** 07          1                   Fast Back to Back Capable: Returns a 1b when read indicating that bridge 
 1203 **                                                                      is able to respond to fast back to back transactions on its primary interface.
 1204 ** 06          0                             Reserved
 1205 ** 05          1                   66 MHz Capable Indication: Returns a 1b when read indicating that bridge primary interface is 66 MHz capable.
 1206 **                                                            1 =
 1207 ** 04          1                    Capabilities List Enable: Returns 1b when read indicating that bridge supports PCI standard enhanced capabilities. 
 1208 **                                                            Offset 34h (Capability Pointer register) 
 1209 **                                                                              provides the offset for the first entry 
 1210 **                                                                              in the linked list of enhanced capabilities.
 1211 ** 03          0                            Interrupt Status: Reflects the state of the interrupt in the device/function.
 1212 **                                                            The bridge does not support interrupts.
 1213 ** 02:00       000                           Reserved
 1214 **==============================================================================
 1215 */
 1216 #define     ARCMSR_PCI2PCI_PRIMARY_STATUS_REG        0x06    /*word: 06,07 */
 1217 #define          ARCMSR_ADAP_66MHZ                   0x20
 1218 /*
 1219 **==============================================================================
 1220 **  0x08 : revision ID 
 1221 ** Bit       Default                       Description
 1222 ** 07:00       00000000                  Revision ID (RID): '00h' indicating bridge A-0 stepping.
 1223 **==============================================================================
 1224 */
 1225 #define     ARCMSR_PCI2PCI_REVISIONID_REG                    0x08    /*byte*/
 1226 /*
 1227 **==============================================================================
 1228 **  0x0b-0x09 : 0180_00 (class code 1,native pci mode ) 
 1229 ** Bit       Default                       Description
 1230 ** 23:16       06h                     Base Class Code (BCC): Indicates that this is a bridge device.
 1231 ** 15:08       04h                      Sub Class Code (SCC): Indicates this is of type PCI-to-PCI bridge.
 1232 ** 07:00       00h               Programming Interface (PIF): Indicates that this is standard (non-subtractive) PCI-PCI bridge.
 1233 **==============================================================================
 1234 */
 1235 #define     ARCMSR_PCI2PCI_CLASSCODE_REG                 0x09    /*3bytes*/
 1236 /*
 1237 **==============================================================================
 1238 **  0x0c : cache line size 
 1239 ** Bit       Default                       Description
 1240 ** 07:00       00h                     Cache Line Size (CLS): Designates the cache line size in 32-bit dword units.
 1241 **                                                            The contents of this register are factored into 
 1242 **                                                                      internal policy decisions associated with memory read prefetching, 
 1243 **                                                                      and the promotion of Memory Write transactions to MWI transactions.
 1244 **                                                            Valid cache line sizes are 8 and 16 dwords. 
 1245 **                                                            When the cache line size is set to an invalid value, 
 1246 **                                                                      bridge behaves as though the cache line size was set to 00h.
 1247 **==============================================================================
 1248 */
 1249 #define     ARCMSR_PCI2PCI_PRIMARY_CACHELINESIZE_REG 0x0C    /*byte*/
 1250 /*
 1251 **==============================================================================
 1252 **  0x0d : latency timer (number of pci clock 00-ff ) 
 1253 ** Bit       Default                       Description
 1254 **                                   Primary Latency Timer (PTV):
 1255 ** 07:00      00h (Conventional PCI)   Conventional PCI Mode: Primary bus Master latency timer. Indicates the number of PCI clock cycles,
 1256 **                                                            referenced from the assertion of FRAME# to the expiration of the timer, 
 1257 **                                                            when bridge may continue as master of the current transaction. All bits are writable, 
 1258 **                                                            resulting in a granularity of 1 PCI clock cycle. 
 1259 **                                                            When the timer expires (i.e., equals 00h) 
 1260 **                                                                      bridge relinquishes the bus after the first data transfer 
 1261 **                                                                      when its PCI bus grant has been deasserted.
 1262 **         or 40h (PCI-X)                         PCI-X Mode: Primary bus Master latency timer. 
 1263 **                                                            Indicates the number of PCI clock cycles,
 1264 **                                                            referenced from the assertion of FRAME# to the expiration of the timer, 
 1265 **                                                            when bridge may continue as master of the current transaction. 
 1266 **                                                            All bits are writable, resulting in a granularity of 1 PCI clock cycle. 
 1267 **                                                            When the timer expires (i.e., equals 00h) bridge relinquishes the bus at the next ADB. 
 1268 **                                                            (Except in the case where MLT expires within 3 data phases 
 1269 **                                                              of an ADB.In this case bridge continues on 
 1270 **                                                              until it reaches the next ADB before relinquishing the bus.)
 1271 **==============================================================================
 1272 */
 1273 #define     ARCMSR_PCI2PCI_PRIMARY_LATENCYTIMER_REG      0x0D    /*byte*/
 1274 /*
 1275 **==============================================================================
 1276 **  0x0e : (header type,single function ) 
 1277 ** Bit       Default                       Description
 1278 ** 07           0                Multi-function device (MVD): 80331 is a single-function device.
 1279 ** 06:00       01h                       Header Type (HTYPE): Defines the layout of addresses 10h through 3Fh in configuration space. 
 1280 **                                                            Returns ˇ§01hˇ¨ when read indicating 
 1281 **                                                              that the register layout conforms to the standard PCI-to-PCI bridge layout.
 1282 **==============================================================================
 1283 */
 1284 #define     ARCMSR_PCI2PCI_HEADERTYPE_REG                0x0E    /*byte*/
 1285 /*
 1286 **==============================================================================
 1287 **     0x0f   : 
 1288 **==============================================================================
 1289 */
 1290 /*
 1291 **==============================================================================
 1292 **  0x13-0x10 : 
 1293 **  PCI CFG Base Address #0 (0x10) 
 1294 **==============================================================================
 1295 */
 1296 /*
 1297 **==============================================================================
 1298 **  0x17-0x14 : 
 1299 **  PCI CFG Base Address #1 (0x14) 
 1300 **==============================================================================
 1301 */
 1302 /*
 1303 **==============================================================================
 1304 **  0x1b-0x18 : 
 1305 **  PCI CFG Base Address #2 (0x18) 
 1306 **-----------------0x1A,0x19,0x18--Bus Number Register - BNR
 1307 ** Bit       Default                       Description
 1308 ** 23:16       00h             Subordinate Bus Number (SBBN): Indicates the highest PCI bus number below this bridge. 
 1309 **                                                            Any Type 1 configuration cycle 
 1310 **                                                                      on the primary bus whose bus number is greater than the secondary bus number,
 1311 **                                                            and less than or equal to the subordinate bus number 
 1312 **                                                                      is forwarded unaltered as a Type 1 configuration cycle on the secondary PCI bus.
 1313 ** 15:08       00h               Secondary Bus Number (SCBN): Indicates the bus number of PCI to which the secondary interface is connected. 
 1314 **                                                            Any Type 1 configuration cycle matching this bus number 
 1315 **                                                                      is translated to a Type 0 configuration cycle (or a Special Cycle) 
 1316 **                                                                      before being executed on bridge's secondary PCI bus.
 1317 ** 07:00       00h                  Primary Bus Number (PBN): Indicates bridge primary bus number. 
 1318 **                                                            Any Type 1 configuration cycle on the primary interface 
 1319 **                                                                      with a bus number that is less than the contents 
 1320 **                                                                      of this register field does not be claimed by bridge.
 1321 **-----------------0x1B--Secondary Latency Timer Register - SLTR
 1322 ** Bit       Default                       Description
 1323 **                             Secondary Latency Timer (STV):
 1324 ** 07:00       00h (Conventional PCI)  Conventional PCI Mode: Secondary bus Master latency timer. 
 1325 **                                                            Indicates the number of PCI clock cycles,
 1326 **                                                                      referenced from the assertion of FRAME# to the expiration of the timer, 
 1327 **                                                            when bridge may continue as master of the current transaction. All bits are writable, 
 1328 **                                                            resulting in a granularity of 1 PCI clock cycle.
 1329 **                                                            When the timer expires (i.e., equals 00h) 
 1330 **                                                              bridge relinquishes the bus after the first data transfer 
 1331 **                                                              when its PCI bus grant has been deasserted.
 1332 **          or 40h (PCI-X)                        PCI-X Mode: Secondary bus Master latency timer. 
 1333 **                                                            Indicates the number of PCI clock cycles,referenced from the assertion of FRAME# 
 1334 **                                                              to the expiration of the timer, 
 1335 **                                                            when bridge may continue as master of the current transaction. All bits are writable, 
 1336 **                                                            resulting in a granularity of 1 PCI clock cycle.
 1337 **                                                            When the timer expires (i.e., equals 00h) bridge relinquishes the bus at the next ADB. 
 1338 **                                                            (Except in the case where MLT expires within 3 data phases of an ADB. 
 1339 **                                                              In this case bridge continues on until it reaches the next ADB 
 1340 **                                                              before relinquishing the bus)
 1341 **==============================================================================
 1342 */
 1343 #define     ARCMSR_PCI2PCI_PRIMARY_BUSNUMBER_REG                 0x18    /*3byte 0x1A,0x19,0x18*/
 1344 #define     ARCMSR_PCI2PCI_SECONDARY_BUSNUMBER_REG               0x19    /*byte*/
 1345 #define     ARCMSR_PCI2PCI_SUBORDINATE_BUSNUMBER_REG             0x1A    /*byte*/
 1346 #define     ARCMSR_PCI2PCI_SECONDARY_LATENCYTIMER_REG            0x1B    /*byte*/
 1347 /*
 1348 **==============================================================================
 1349 **  0x1f-0x1c : 
 1350 **  PCI CFG Base Address #3 (0x1C) 
 1351 **-----------------0x1D,0x1C--I/O Base and Limit Register - IOBL
 1352 ** Bit       Default                       Description
 1353 ** 15:12        0h            I/O Limit Address Bits [15:12]: Defines the top address of an address range to 
 1354 **                                                              determine when to forward I/O transactions from one interface to the other. 
 1355 **                                                            These bits correspond to address lines 15:12 for 4KB alignment. 
 1356 **                                                            Bits 11:0 are assumed to be FFFh.
 1357 ** 11:08        1h           I/O Limit Addressing Capability: This field is hard-wired to 1h, indicating support 32-bit I/O addressing.
 1358 ** 07:04        0h             I/O Base Address Bits [15:12]: Defines the bottom address of 
 1359 **                                                              an address range to determine when to forward I/O transactions 
 1360 **                                                              from one interface to the other. 
 1361 **                                                            These bits correspond to address lines 15:12 for 4KB alignment. 
 1362 **                                                              Bits 11:0 are assumed to be 000h.
 1363 ** 03:00        1h            I/O Base Addressing Capability: This is hard-wired to 1h, indicating support for 32-bit I/O addressing.
 1364 **-----------------0x1F,0x1E--Secondary Status Register - SSR
 1365 ** Bit       Default                       Description
 1366 ** 15           0b                     Detected Parity Error: The bridge sets this bit to a 1b whenever it detects an address, 
 1367 **                                                              attribute or data parity error on its secondary interface.
 1368 ** 14           0b                     Received System Error: The bridge sets this bit when it samples SERR# asserted on its secondary bus interface.
 1369 ** 13           0b                     Received Master Abort: The bridge sets this bit to a 1b when, 
 1370 **                                                              acting as the initiator on the secondary bus, 
 1371 **                                                              it's transaction (with the exception of special cycles) 
 1372 **                                                              has been terminated with a Master Abort.
 1373 ** 12           0b                     Received Target Abort: The bridge sets this bit to a 1b when, 
 1374 **                                                              acting as the initiator on the secondary bus, 
 1375 **                                                              it's transaction has been terminated with a Target Abort.
 1376 ** 11           0b                     Signaled Target Abort: The bridge sets this bit to a 1b when it, 
 1377 **                                                              as the target of a transaction, terminates it with a Target Abort. 
 1378 **                                                            In PCI-X mode this bit is also set when it forwards a SCM with a target abort error code.
 1379 ** 10:09       01b                            DEVSEL# Timing: Indicates slowest response to a non-configuration command on the secondary interface. 
 1380 **                                                            Returns ˇ§01bˇ¨ when read, indicating that bridge responds no slower than with medium timing.
 1381 ** 08           0b                  Master Data Parity Error: The bridge sets this bit to a 1b when all of the following conditions are true:
 1382 **                                                            The bridge is the current master on the secondary bus
 1383 **                                                            S_PERR# is detected asserted or is asserted by bridge
 1384 **                                                            The Parity Error Response bit is set in the Command register 
 1385 ** 07           1b           Fast Back-to-Back Capable (FBC): Indicates that the secondary interface of bridge can receive fast back-to-back cycles.
 1386 ** 06           0b                           Reserved
 1387 ** 05           1b                      66 MHz Capable (C66): Indicates the secondary interface of the bridge is 66 MHz capable.
 1388 **                                                            1 =
 1389 ** 04:00       00h                           Reserved
 1390 **==============================================================================
 1391 */
 1392 #define     ARCMSR_PCI2PCI_IO_BASE_REG                       0x1C    /*byte*/
 1393 #define     ARCMSR_PCI2PCI_IO_LIMIT_REG                      0x1D    /*byte*/
 1394 #define     ARCMSR_PCI2PCI_SECONDARY_STATUS_REG              0x1E    /*word: 0x1F,0x1E */
 1395 /*
 1396 **==============================================================================
 1397 **  0x23-0x20 : 
 1398 **  PCI CFG Base Address #4 (0x20)
 1399 **-----------------0x23,0x22,0x21,0x20--Memory Base and Limit Register - MBL
 1400 ** Bit       Default                       Description
 1401 ** 31:20      000h                              Memory Limit: These 12 bits are compared with P_AD[31:20] of the incoming address to determine
 1402 **                                                            the upper 1MB aligned value (exclusive) of the range. 
 1403 **                                                            The incoming address must be less than or equal to this value. 
 1404 **                                                            For the purposes of address decoding the lower 20 address bits (P_AD[19:0] 
 1405 **                                                                      are assumed to be F FFFFh.
 1406 ** 19:16        0h                            Reserved.
 1407 ** 15:04      000h                               Memory Base: These 12 bits are compared with bits P_AD[31:20] 
 1408 **                                                              of the incoming address to determine the lower 1MB 
 1409 **                                                              aligned value (inclusive) of the range. 
 1410 **                                                            The incoming address must be greater than or equal to this value.
 1411 **                                                            For the purposes of address decoding the lower 20 address bits (P_AD[19:0]) 
 1412 **                                                              are assumed to be 0 0000h.
 1413 ** 03:00        0h                            Reserved.
 1414 **==============================================================================
 1415 */
 1416 #define     ARCMSR_PCI2PCI_NONPREFETCHABLE_MEMORY_BASE_REG   0x20    /*word: 0x21,0x20 */
 1417 #define     ARCMSR_PCI2PCI_NONPREFETCHABLE_MEMORY_LIMIT_REG  0x22    /*word: 0x23,0x22 */
 1418 /*
 1419 **==============================================================================
 1420 **  0x27-0x24 : 
 1421 **  PCI CFG Base Address #5 (0x24) 
 1422 **-----------------0x27,0x26,0x25,0x24--Prefetchable Memory Base and Limit Register - PMBL
 1423 ** Bit       Default                       Description
 1424 ** 31:20      000h                 Prefetchable Memory Limit: These 12 bits are compared with P_AD[31:20] of the incoming address to determine
 1425 **                                                            the upper 1MB aligned value (exclusive) of the range. 
 1426 **                                                            The incoming address must be less than or equal to this value. 
 1427 **                                                            For the purposes of address decoding the lower 20 address bits (P_AD[19:0] 
 1428 **                                                                      are assumed to be F FFFFh.
 1429 ** 19:16        1h                          64-bit Indicator: Indicates that 64-bit addressing is supported.
 1430 ** 15:04      000h                  Prefetchable Memory Base: These 12 bits are compared with bits P_AD[31:20] 
 1431 **                                                              of the incoming address to determine the lower 1MB aligned value (inclusive) 
 1432 **                                                              of the range. 
 1433 **                                                            The incoming address must be greater than or equal to this value. 
 1434 **                                                            For the purposes of address decoding the lower 20 address bits (P_AD[19:0])
 1435 **                                                               are assumed to be 0 0000h.
 1436 ** 03:00        1h                          64-bit Indicator: Indicates that 64-bit addressing is supported.
 1437 **==============================================================================
 1438 */
 1439 #define     ARCMSR_PCI2PCI_PREFETCHABLE_MEMORY_BASE_REG      0x24    /*word: 0x25,0x24 */
 1440 #define     ARCMSR_PCI2PCI_PREFETCHABLE_MEMORY_LIMIT_REG     0x26    /*word: 0x27,0x26 */
 1441 /*
 1442 **==============================================================================
 1443 **  0x2b-0x28 : 
 1444 ** Bit       Default                       Description
 1445 ** 31:00    00000000h Prefetchable Memory Base Upper Portion: All bits are read/writable  
 1446 **                                                            bridge supports full 64-bit addressing.
 1447 **==============================================================================
 1448 */
 1449 #define     ARCMSR_PCI2PCI_PREFETCHABLE_MEMORY_BASE_UPPER32_REG     0x28    /*dword: 0x2b,0x2a,0x29,0x28 */
 1450 /*
 1451 **==============================================================================
 1452 **  0x2f-0x2c : 
 1453 ** Bit       Default                       Description
 1454 ** 31:00    00000000h Prefetchable Memory Limit Upper Portion: All bits are read/writable 
 1455 **                                                             bridge supports full 64-bit addressing.
 1456 **==============================================================================
 1457 */
 1458 #define     ARCMSR_PCI2PCI_PREFETCHABLE_MEMORY_LIMIT_UPPER32_REG    0x2C    /*dword: 0x2f,0x2e,0x2d,0x2c */
 1459 /*
 1460 **==============================================================================
 1461 **  0x33-0x30 : 
 1462 ** Bit       Default                       Description
 1463 ** 07:00       DCh                      Capabilities Pointer: Pointer to the first CAP ID entry in the capabilities list is at DCh in PCI configuration
 1464 **                                                            space. (Power Management Capability Registers)
 1465 **==============================================================================
 1466 */
 1467 #define     ARCMSR_PCI2PCI_CAPABILITIES_POINTER_REG                      0x34    /*byte*/ 
 1468 /*
 1469 **==============================================================================
 1470 **  0x3b-0x35 : reserved
 1471 **==============================================================================
 1472 */
 1473 /*
 1474 **==============================================================================
 1475 **  0x3d-0x3c : 
 1476 **
 1477 ** Bit       Default                       Description
 1478 ** 15:08       00h                       Interrupt Pin (PIN): Bridges do not support the generation of interrupts.
 1479 ** 07:00       00h                     Interrupt Line (LINE): The bridge does not generate interrupts, so this is reserved as '00h'.
 1480 **==============================================================================
 1481 */
 1482 #define     ARCMSR_PCI2PCI_PRIMARY_INTERRUPT_LINE_REG                0x3C    /*byte*/ 
 1483 #define     ARCMSR_PCI2PCI_PRIMARY_INTERRUPT_PIN_REG                 0x3D    /*byte*/ 
 1484 /*
 1485 **==============================================================================
 1486 **  0x3f-0x3e : 
 1487 ** Bit       Default                       Description
 1488 ** 15:12        0h                          Reserved
 1489 ** 11           0b                Discard Timer SERR# Enable: Controls the generation of SERR# on the primary interface (P_SERR#) in response
 1490 **                                                            to a timer discard on either the primary or secondary interface.
 1491 **                                                            0b=SERR# is not asserted.
 1492 **                                                            1b=SERR# is asserted.
 1493 ** 10           0b                Discard Timer Status (DTS): This bit is set to a '1b' when either the primary or secondary discard timer expires.
 1494 **                                                            The delayed completion is then discarded.
 1495 ** 09           0b             Secondary Discard Timer (SDT): Sets the maximum number of PCI clock cycles 
 1496 **                                                                      that bridge waits for an initiator on the secondary bus 
 1497 **                                                                      to repeat a delayed transaction request. 
 1498 **                                                            The counter starts when the delayed transaction completion is ready 
 1499 **                                                                      to be returned to the initiator. 
 1500 **                                                            When the initiator has not repeated the transaction 
 1501 **                                                                      at least once before the counter expires,bridge 
 1502 **                                                                              discards the delayed transaction from its queues.
 1503 **                                                            0b=The secondary master time-out counter is 2 15 PCI clock cycles.
 1504 **                                                            1b=The secondary master time-out counter is 2 10 PCI clock cycles.
 1505 ** 08           0b               Primary Discard Timer (PDT): Sets the maximum number of PCI clock cycles 
 1506 **                                                                      that bridge waits for an initiator on the primary bus 
 1507 **                                                                      to repeat a delayed transaction request. 
 1508 **                                                            The counter starts when the delayed transaction completion 
 1509 **                                                                      is ready to be returned to the initiator. 
 1510 **                                                            When the initiator has not repeated the transaction 
 1511 **                                                                      at least once before the counter expires, 
 1512 **                                                                      bridge discards the delayed transaction from its queues.
 1513 **                                                            0b=The primary master time-out counter is 2 15 PCI clock cycles.
 1514 **                                                            1b=The primary master time-out counter is 2 10 PCI clock cycles.
 1515 ** 07           0b            Fast Back-to-Back Enable (FBE): The bridge does not initiate back to back transactions.
 1516 ** 06           0b                 Secondary Bus Reset (SBR): 
 1517 **                                                            When cleared to 0b: The bridge deasserts S_RST#, 
 1518 **                                                                      when it had been asserted by writing this bit to a 1b.
 1519 **                                                                When set to 1b: The bridge asserts S_RST#.
 1520 ** 05           0b                   Master Abort Mode (MAM): Dictates bridge behavior on the initiator bus 
 1521 **                                                                      when a master abort termination occurs in response to 
 1522 **                                                                              a delayed transaction initiated by bridge on the target bus.
 1523 **                                                            0b=The bridge asserts TRDY# in response to a non-locked delayed transaction,
 1524 **                                                                              and returns FFFF FFFFh when a read.
 1525 **                                                            1b=When the transaction had not yet been completed on the initiator bus 
 1526 **                                                                              (e.g.,delayed reads, or non-posted writes), 
 1527 **                                                                 then bridge returns a Target Abort in response to the original requester 
 1528 **                                                                 when it returns looking for its delayed completion on the initiator bus. 
 1529 **                                                                 When the transaction had completed on the initiator bus (e.g., a PMW), 
 1530 **                                                                              then bridge asserts P_SERR# (when enabled).
 1531 **                                   For PCI-X transactions this bit is an enable for the assertion of P_SERR# due to a master abort 
 1532 **                                                              while attempting to deliver a posted memory write on the destination bus.
 1533 ** 04           0b                   VGA Alias Filter Enable: This bit dictates bridge behavior in conjunction with the VGA enable bit 
 1534 **                                                              (also of this register), 
 1535 **                                                            and the VGA Palette Snoop Enable bit (Command Register). 
 1536 **                                                            When the VGA enable, or VGA Palette Snoop enable bits are on (i.e., 1b) 
 1537 **                                                                      the VGA Aliasing bit for the corresponding enabled functionality,:
 1538 **                                                            0b=Ignores address bits AD[15:10] when decoding VGA I/O addresses.
 1539 **                                                            1b=Ensures that address bits AD[15:10] equal 000000b when decoding VGA I/O addresses.
 1540 **                                   When all VGA cycle forwarding is disabled, (i.e., VGA Enable bit =0b and VGA Palette Snoop bit =0b), 
 1541 **                                                                      then this bit has no impact on bridge behavior.
 1542 ** 03           0b                                VGA Enable: Setting this bit enables address decoding
 1543 **                                                               and transaction forwarding of the following VGA transactions from the primary bus 
 1544 **                                                                      to the secondary bus:
 1545 **                                                            frame buffer memory addresses 000A0000h:000BFFFFh, 
 1546 **                                                                      VGA I/O addresses 3B0:3BBh and 3C0h:3DFh, where AD[31:16]=ˇ§0000h?**                                                                    ?and AD[15:10] are either not decoded (i.e., don't cares),
 1547 **                                                                               or must be ˇ§000000bˇ¨
 1548 **                                                            depending upon the state of the VGA Alias Filter Enable bit. (bit(4) of this register)
 1549 **                                                            I/O and Memory Enable bits must be set in the Command register 
 1550 **                                                                              to enable forwarding of VGA cycles.
 1551 ** 02           0b                                ISA Enable: Setting this bit enables special handling 
 1552 **                                                              for the forwarding of ISA I/O transactions that fall within the address range 
 1553 **                                                                      specified by the I/O Base and Limit registers, 
 1554 **                                                                              and are within the lowest 64Kbyte of the I/O address map 
 1555 **                                                                                      (i.e., 0000 0000h - 0000 FFFFh).
 1556 **                                                            0b=All I/O transactions that fall within the I/O Base 
 1557 **                                                                              and Limit registers' specified range are forwarded 
 1558 **                                                                                      from primary to secondary unfiltered.
 1559 **                                                            1b=Blocks the forwarding from primary to secondary 
 1560 **                                                                                      of the top 768 bytes of each 1Kbyte alias. 
 1561 **                                                                                              On the secondary the top 768 bytes of each 1K alias 
 1562 **                                                                                                      are inversely decoded and forwarded 
 1563 **                                                                                                              from secondary to primary.
 1564 ** 01           0b                      SERR# Forward Enable: 0b=The bridge does not assert P_SERR# as a result of an S_SERR# assertion.
 1565 **                                                            1b=The bridge asserts P_SERR# whenever S_SERR# is detected 
 1566 **                                                                      asserted provided the SERR# Enable bit is set (PCI Command Register bit(8)=1b).
 1567 ** 00           0b                     Parity Error Response: This bit controls bridge response to a parity error 
 1568 **                                                                              that is detected on its secondary interface.
 1569 **                                                            0b=When a data parity error is detected bridge does not assert S_PERR#. 
 1570 **                                                            Also bridge does not assert P_SERR# in response to a detected address 
 1571 **                                                                              or attribute parity error.
 1572 **                                                            1b=When a data parity error is detected bridge asserts S_PERR#. 
 1573 **                                                                              The bridge also asserts P_SERR# (when enabled globally via bit(8) 
 1574 **                                                                                      of the Command register)
 1575 **                                                            in response to a detected address or attribute parity error.
 1576 **==============================================================================
 1577 */
 1578 #define     ARCMSR_PCI2PCI_BRIDGE_CONTROL_REG                        0x3E    /*word*/ 
 1579 /*
 1580 **************************************************************************
 1581 **                  Device Specific Registers 40-A7h
 1582 **************************************************************************
 1583 ** ----------------------------------------------------------------------------------------------------------
 1584 ** |    Byte 3              |         Byte 2         |        Byte 1          |       Byte 0              | Configu-ration Byte Offset
 1585 ** ----------------------------------------------------------------------------------------------------------
 1586 ** |    Bridge Control 0    |             Arbiter Control/Status              |      Reserved             | 40h
 1587 ** ----------------------------------------------------------------------------------------------------------
 1588 ** |                 Bridge Control 2                |                 Bridge Control 1                   | 44h
 1589 ** ----------------------------------------------------------------------------------------------------------
 1590 ** |                    Reserved                     |                 Bridge Status                      | 48h
 1591 ** ----------------------------------------------------------------------------------------------------------
 1592 ** |                                             Reserved                                                 | 4Ch
 1593 ** ----------------------------------------------------------------------------------------------------------
 1594 ** |                 Prefetch Policy                 |               Multi-Transaction Timer              | 50h
 1595 ** ----------------------------------------------------------------------------------------------------------
 1596 ** |       Reserved         |      Pre-boot Status   |             P_SERR# Assertion Control              | 54h
 1597 ** ----------------------------------------------------------------------------------------------------------
 1598 ** |       Reserved         |        Reserved        |             Secondary Decode Enable                | 58h
 1599 ** ----------------------------------------------------------------------------------------------------------
 1600 ** |                    Reserved                     |                 Secondary IDSEL                    | 5Ch
 1601 ** ----------------------------------------------------------------------------------------------------------
 1602 ** |                                              Reserved                                                | 5Ch
 1603 ** ----------------------------------------------------------------------------------------------------------
 1604 ** |                                              Reserved                                                | 68h:CBh
 1605 ** ----------------------------------------------------------------------------------------------------------
 1606 **************************************************************************
 1607 **==============================================================================
 1608 **  0x42-0x41: Secondary Arbiter Control/Status Register - SACSR
 1609 ** Bit       Default                       Description
 1610 ** 15:12      1111b                  Grant Time-out Violator: This field indicates the agent that violated the Grant Time-out rule 
 1611 **                                                      (PCI=16 clocks,PCI-X=6 clocks). 
 1612 **                                   Note that this field is only meaningful when:
 1613 **                                                              # Bit[11] of this register is set to 1b, 
 1614 **                                                                      indicating that a Grant Time-out violation had occurred. 
 1615 **                                                              # bridge internal arbiter is enabled.
 1616 **                                           Bits[15:12] Violating Agent (REQ#/GNT# pair number)
 1617 **                                                 0000b REQ#/GNT#[0]
 1618 **                                                 0001b REQ#/GNT#[1]
 1619 **                                                 0010b REQ#/GNT#[2]
 1620 **                                                 0011b REQ#/GNT#[3]
 1621 **                                                 1111b Default Value (no violation detected)
 1622 **                                   When bit[11] is cleared by software, this field reverts back to its default value.
 1623 **                                   All other values are Reserved
 1624 ** 11            0b                  Grant Time-out Occurred: When set to 1b, 
 1625 **                                   this indicates that a Grant Time-out error had occurred involving one of the secondary bus agents.
 1626 **                                   Software clears this bit by writing a 1b to it.
 1627 ** 10            0b                      Bus Parking Control: 0=During bus idle, bridge parks the bus on the last master to use the bus.
 1628 **                                                            1=During bus idle, bridge parks the bus on itself. 
 1629 **                                                                      The bus grant is removed from the last master and internally asserted to bridge.
 1630 ** 09:08        00b                          Reserved
 1631 ** 07:00      0000 0000b  Secondary Bus Arbiter Priority Configuration: The bridge secondary arbiter provides two rings of arbitration priority. 
 1632 **                                                                      Each bit of this field assigns its corresponding secondary 
 1633 **                                                                              bus master to either the high priority arbiter ring (1b) 
 1634 **                                                                                      or to the low priority arbiter ring (0b). 
 1635 **                                                                      Bits [3:0] correspond to request inputs S_REQ#[3:0], respectively. 
 1636 **                                                                      Bit [6] corresponds to the bridge internal secondary bus request 
 1637 **                                                                              while Bit [7] corresponds to the SATU secondary bus request. 
 1638 **                                                                      Bits [5:4] are unused.
 1639 **                                                                      0b=Indicates that the master belongs to the low priority group.
 1640 **                                                                      1b=Indicates that the master belongs to the high priority group
 1641 **=================================================================================
 1642 **  0x43: Bridge Control Register 0 - BCR0
 1643 ** Bit       Default                       Description
 1644 ** 07           0b                  Fully Dynamic Queue Mode: 0=The number of Posted write transactions is limited to eight 
 1645 **                                                                      and the Posted Write data is limited to 4KB.
 1646 **                                                            1=Operation in fully dynamic queue mode. The bridge enqueues up to 
 1647 **                                                                      14 Posted Memory Write transactions and 8KB of posted write data.
 1648 ** 06:03        0H                          Reserved.
 1649 ** 02           0b                 Upstream Prefetch Disable: This bit disables bridge ability 
 1650 **                                                                      to perform upstream prefetch operations for Memory 
 1651 **                                                                              Read requests received on its secondary interface. 
 1652 **                                 This bit also controls the bridge's ability to generate advanced read commands 
 1653 **                                                              when forwarding a Memory Read Block transaction request upstream from a PCI-X bus 
 1654 **                                                                              to a Conventional PCI bus.
 1655 **                                 0b=bridge treats all upstream Memory Read requests as though they target prefetchable memory.
 1656 **                                                                              The use of Memory Read Line and Memory Read
 1657 **                                      Multiple is enabled when forwarding a PCI-X Memory Read Block request 
 1658 **                                                                              to an upstream bus operating in Conventional PCI mode.
 1659 **                                 1b=bridge treats upstream PCI Memory Read requests as though 
 1660 **                                                                      they target non-prefetchable memory and forwards upstream PCI-X Memory 
 1661 **                                                                                      Read Block commands as Memory Read 
 1662 **                                                                                              when the primary bus is operating 
 1663 **                                                                                                      in Conventional PCI mode.
 1664 **                                 NOTE: This bit does not affect bridge ability to perform read prefetching 
 1665 **                                                                      when the received command is Memory Read Line or Memory Read Multiple.
 1666 **=================================================================================
 1667 **  0x45-0x44: Bridge Control Register 1 - BCR1 (Sheet 2 of 2)
 1668 ** Bit       Default                       Description
 1669 ** 15:08    0000000b                         Reserved
 1670 ** 07:06         00b                   Alias Command Mapping: This two bit field determines how bridge handles PCI-X ˇ§Aliasˇ¨ commands, 
 1671 **                                                              specifically the Alias to Memory Read Block and Alias to Memory Write Block commands. 
 1672 **                                                            The three options for handling these alias commands are to either pass it as is, 
 1673 **                                                                      re-map to the actual block memory read/write command encoding, or ignore
 1674 **                                                                              the transaction forcing a Master Abort to occur on the Origination Bus.
 1675 **                                                   Bit (7:6) Handling of command
 1676 **                                                        0 0 Re-map to Memory Read/Write Block before forwarding
 1677 **                                                        0 1 Enqueue and forward the alias command code unaltered
 1678 **                                                        1 0 Ignore the transaction, forcing Master Abort
 1679 **                                                        1 1 Reserved
 1680 ** 05            1b                  Watchdog Timers Disable: Disables or enables all 2 24 Watchdog Timers in both directions. 
 1681 **                                                            The watchdog timers are used to detect prohibitively long latencies in the system. 
 1682 **                                                            The watchdog timer expires when any Posted Memory Write (PMW), Delayed Request, 
 1683 **                                                            or Split Requests (PCI-X mode) is not completed within 2 24 events 
 1684 **                                                            (ˇ§eventsˇ¨ are defined as PCI Clocks when operating in PCI-X mode, 
 1685 **                                                              and as the number of times being retried when operating in Conventional PCI mode)
 1686 **                                                            0b=All 2 24 watchdog timers are enabled.
 1687 **                                                            1b=All 2 24 watchdog timers are disabled and there is no limits to 
 1688 **                                                                      the number of attempts bridge makes when initiating a PMW, 
 1689 **                                                                 transacting a Delayed Transaction, or how long it waits for 
 1690 **                                                                      a split completion corresponding to one of its requests.
 1691 ** 04            0b                  GRANT# time-out disable: This bit enables/disables the GNT# time-out mechanism. 
 1692 **                                                            Grant time-out is 16 clocks for conventional PCI, and 6 clocks for PCI-X.
 1693 **                                                            0b=The Secondary bus arbiter times out an agent 
 1694 **                                                                      that does not assert FRAME# within 16/6 clocks of receiving its grant, 
 1695 **                                                                              once the bus has gone idle. 
 1696 **                                                                 The time-out counter begins as soon as the bus goes idle with the new GNT# asserted. 
 1697 **                                                                 An infringing agent does not receive a subsequent GNT# 
 1698 **                                                                      until it de-asserts its REQ# for at least one clock cycle.
 1699 **                                                            1b=GNT# time-out mechanism is disabled.
 1700 ** 03           00b                           Reserved.
 1701 ** 02            0b          Secondary Discard Timer Disable: This bit enables/disables bridge secondary delayed transaction discard mechanism.
 1702 **                                                            The time out mechanism is used to ensure that initiators 
 1703 **                                                                      of delayed transactions return for their delayed completion data/status 
 1704 **                                                                              within a reasonable amount of time after it is available from bridge.
 1705 **                                                            0b=The secondary master time-out counter is enabled 
 1706 **                                                                              and uses the value specified by the Secondary Discard Timer bit 
 1707 **                                                                                      (see Bridge Control Register).
 1708 **                                                            1b=The secondary master time-out counter is disabled. 
 1709 **                                                                                      The bridge waits indefinitely for a secondary bus master 
 1710 **                                                                                              to repeat a delayed transaction.
 1711 ** 01            0b            Primary Discard Timer Disable: This bit enables/disables bridge primary delayed transaction discard mechanism. 
 1712 **                                                              The time out mechanism is used to ensure that initiators 
 1713 **                                                                      of delayed transactions return for their delayed completion data/status 
 1714 **                                                                              within a reasonable amount of time after it is available from bridge.
 1715 **                                                            0b=The primary master time-out counter is enabled and uses the value specified 
 1716 **                                                                      by the Primary Discard Timer bit (see Bridge Control Register).
 1717 **                                                            1b=The secondary master time-out counter is disabled. 
 1718 **                                                                      The bridge waits indefinitely for a secondary bus master 
 1719 **                                                                              to repeat a delayed transaction.
 1720 ** 00            0b                           Reserved
 1721 **=================================================================================
 1722 **  0x47-0x46: Bridge Control Register 2 - BCR2
 1723 ** Bit       Default                       Description
 1724 ** 15:07      0000b                          Reserved.
 1725 ** 06            0b Global Clock Out Disable (External Secondary Bus Clock Source Enable): 
 1726 **                                                                      This bit disables all of the secondary PCI clock outputs including 
 1727 **                                                                              the feedback clock S_CLKOUT. 
 1728 **                                                            This means that the user is required to provide an S_CLKIN input source.
 1729 ** 05:04        11 (66 MHz)                  Preserved.
 1730 **              01 (100 MHz)
 1731 **              00 (133 MHz)
 1732 ** 03:00        Fh (100 MHz & 66 MHz)
 1733 **              7h (133 MHz)
 1734 **                                        This 4 bit field provides individual enable/disable mask bits for each of bridge
 1735 **                                        secondary PCI clock outputs. Some, or all secondary clock outputs (S_CLKO[3:0])
 1736 **                                        default to being enabled following the rising edge of P_RST#, depending on the
 1737 **                                        frequency of the secondary bus clock:
 1738 **                                               ˇE Designs with 100 MHz (or lower) Secondary PCI clock power up with 
 1739 **                                                              all four S_CLKOs enabled by default. (SCLKO[3:0])ˇP
 1740 **                                               ˇE Designs with 133 MHz Secondary PCI clock power up 
 1741 **                                                              with the lower order 3 S_CLKOs enabled by default. 
 1742 **                                                              (S_CLKO[2:0]) Only those SCLKs that power up enabled by can be connected 
 1743 **                                                              to downstream device clock inputs.
 1744 **=================================================================================
 1745 **  0x49-0x48: Bridge Status Register - BSR
 1746 ** Bit       Default                       Description
 1747 ** 15           0b  Upstream Delayed Transaction Discard Timer Expired: This bit is set to a 1b and P_SERR# 
 1748 **                                                                      is conditionally asserted when the secondary discard timer expires.
 1749 ** 14           0b  Upstream Delayed/Split Read Watchdog Timer Expired: 
 1750 **                                                     Conventional PCI Mode: This bit is set to a 1b and P_SERR#
 1751 **                                                                      is conditionally asserted when bridge discards an upstream delayed read **      **                                                                      transaction request after 2 24 retries following the initial retry.
 1752 **                                                                PCI-X Mode: This bit is set to a 1b and P_SERR# is conditionally asserted 
 1753 **                                                                      when bridge discards an upstream split read request 
 1754 **                                                                      after waiting in excess of 2 24 clocks for the corresponding 
 1755 **                                                                      Split Completion to arrive.
 1756 ** 13           0b Upstream Delayed/Split Write Watchdog Timer Expired: 
 1757 **                                                     Conventional PCI Mode: This bit is set to a 1b and P_SERR# 
 1758 **                                                                      is conditionally asserted when bridge discards an upstream delayed write **     **                                                                      transaction request after 2 24 retries following the initial retry.
 1759 **                                                                PCI-X Mode: This bit is set to a 1b and P_SERR# 
 1760 **                                                                      is conditionally asserted when bridge discards an upstream split write request **                                                                       after waiting in excess of 2 24 clocks for the corresponding 
 1761 **                                                                      Split Completion to arrive.
 1762 ** 12           0b           Master Abort during Upstream Posted Write: This bit is set to a 1b and P_SERR# 
 1763 **                                                                      is conditionally asserted when a Master Abort occurs as a result of an attempt, 
 1764 **                                                                      by bridge, to retire a PMW upstream.
 1765 ** 11           0b           Target Abort during Upstream Posted Write: This bit is set to a 1b and P_SERR# 
 1766 **                                                                      is conditionally asserted when a Target Abort occurs as a result of an attempt,
 1767 **                                                                      by bridge, to retire a PMW upstream.
 1768 ** 10           0b                Upstream Posted Write Data Discarded: This bit is set to a 1b and P_SERR# 
 1769 **                                                                      is conditionally asserted when bridge discards an upstream PMW transaction 
 1770 **                                                                      after receiving 2 24 target retries from the primary bus target
 1771 ** 09           0b             Upstream Posted Write Data Parity Error: This bit is set to a 1b and P_SERR# 
 1772 **                                                                      is conditionally asserted when a data parity error is detected by bridge 
 1773 **                                                                      while attempting to retire a PMW upstream
 1774 ** 08           0b                  Secondary Bus Address Parity Error: This bit is set to a 1b and P_SERR# 
 1775 **                                                                      is conditionally asserted when bridge detects an address parity error on 
 1776 **                                                                      the secondary bus.
 1777 ** 07           0b Downstream Delayed Transaction Discard Timer Expired: This bit is set to a 1b and P_SERR# 
 1778 **                                                                      is conditionally asserted when the primary bus discard timer expires.
 1779 ** 06           0b Downstream Delayed/Split Read Watchdog Timer Expired:
 1780 **                                                     Conventional PCI Mode: This bit is set to a 1b and P_SERR# 
 1781 **                                                                      is conditionally asserted when bridge discards a downstream delayed read **     **                                                                              transaction request after receiving 2 24 target retries
 1782 **                                                                                       from the secondary bus target.
 1783 **                                                                PCI-X Mode: This bit is set to a 1b and P_SERR# is conditionally asserted 
 1784 **                                                                              when bridge discards a downstream split read request 
 1785 **                                                                                      after waiting in excess of 2 24 clocks for the corresponding 
 1786 **                                                                                              Split Completion to arrive.
 1787 ** 05           0b Downstream Delayed Write/Split Watchdog Timer Expired:
 1788 **                                                     Conventional PCI Mode: This bit is set to a 1b and P_SERR# is conditionally asserted 
 1789 **                                                                      when bridge discards a downstream delayed write transaction request 
 1790 **                                                                              after receiving 2 24 target retries from the secondary bus target.
 1791 **                                                                PCI-X Mode: This bit is set to a 1b and P_SERR# 
 1792 **                                                                      is conditionally asserted when bridge discards a downstream 
 1793 **                                                                              split write request after waiting in excess of 2 24 clocks 
 1794 **                                                                                      for the corresponding Split Completion to arrive.
 1795 ** 04           0b          Master Abort during Downstream Posted Write: This bit is set to a 1b and P_SERR# 
 1796 **                                                                      is conditionally asserted when a Master Abort occurs as a result of an attempt, 
 1797 **                                                                              by bridge, to retire a PMW downstream.
 1798 ** 03           0b          Target Abort during Downstream Posted Write: This bit is set to a 1b and P_SERR# is conditionally asserted 
 1799 **                                                                              when a Target Abort occurs as a result of an attempt, by bridge, 
 1800 **                                                                                      to retire a PMW downstream.
 1801 ** 02           0b               Downstream Posted Write Data Discarded: This bit is set to a 1b and P_SERR#
 1802 **                                                                      is conditionally asserted when bridge discards a downstream PMW transaction 
 1803 **                                                                              after receiving 2 24 target retries from the secondary bus target
 1804 ** 01           0b            Downstream Posted Write Data Parity Error: This bit is set to a 1b and P_SERR# 
 1805 **                                                                      is conditionally asserted when a data parity error is detected by bridge 
 1806 **                                                                              while attempting to retire a PMW downstream.
 1807 ** 00           0b                     Primary Bus Address Parity Error: This bit is set to a 1b and P_SERR# is conditionally asserted 
 1808 **                                                                              when bridge detects an address parity error on the primary bus.
 1809 **==================================================================================
 1810 **  0x51-0x50: Bridge Multi-Transaction Timer Register - BMTTR
 1811 ** Bit       Default                       Description
 1812 ** 15:13       000b                          Reserved
 1813 ** 12:10       000b                          GRANT# Duration: This field specifies the count (PCI clocks) 
 1814 **                                                      that a secondary bus master has its grant maintained in order to enable 
 1815 **                                                              multiple transactions to execute within the same arbitration cycle.
 1816 **                                                    Bit[02:00] GNT# Extended Duration
 1817 **                                                               000 MTT Disabled (Default=no GNT# extension)
 1818 **                                                               001 16 clocks
 1819 **                                                               010 32 clocks
 1820 **                                                               011 64 clocks
 1821 **                                                               100 128 clocks
 1822 **                                                               101 256 clocks
 1823 **                                                               110 Invalid (treated as 000)
 1824 **                                                               111 Invalid (treated as 000)
 1825 ** 09:08        00b                          Reserved
 1826 ** 07:00        FFh                                 MTT Mask: This field enables/disables MTT usage for each REQ#/GNT# 
 1827 **                                                              pair supported by bridge secondary arbiter. 
 1828 **                                                            Bit(7) corresponds to SATU internal REQ#/GNT# pair,
 1829 **                                                            bit(6) corresponds to bridge internal REQ#/GNT# pair, 
 1830 **                                                            bit(5) corresponds to REQ#/GNT#(5) pair, etc.
 1831 **                                                  When a given bit is set to 1b, its corresponding REQ#/GNT# 
 1832 **                                                              pair is enabled for MTT functionality as determined by bits(12:10) of this register.
 1833 **                                                  When a given bit is cleared to 0b, its corresponding REQ#/GNT# pair is disabled from using the MTT.
 1834 **==================================================================================
 1835 **  0x53-0x52: Read Prefetch Policy Register - RPPR
 1836 ** Bit       Default                       Description
 1837 ** 15:13       000b                    ReRead_Primary Bus: 3-bit field indicating the multiplication factor 
 1838 **                                                      to be used in calculating the number of bytes to prefetch from the secondary bus interface on **                                                                subsequent PreFetch operations given that the read demands were not satisfied 
 1839 **                                                                      using the FirstRead parameter.
 1840 **                                           The default value of 000b correlates to: Command Type Hardwired pre-fetch amount Memory Read 4 DWORDs 
 1841 **                                                      Memory Read Line 1 cache lines Memory Read Multiple 2 cache lines
 1842 ** 12:10       000b                 FirstRead_Primary Bus: 3-bit field indicating the multiplication factor to be used in calculating 
 1843 **                                                      the number of bytes to prefetch from the secondary bus interface 
 1844 **                                                              on the initial PreFetch operation.
 1845 **                                           The default value of 000b correlates to: Command Type Hardwired pre-fetch amount Memory Read 4 DWORDs 
 1846 **                                                              Memory Read Line 1 cache line Memory Read Multiple 2 cache lines
 1847 ** 09:07       010b                  ReRead_Secondary Bus: 3-bit field indicating the multiplication factor to be used 
 1848 **                                                              in calculating the number of bytes to prefetch from the primary 
 1849 **                                                                      bus interface on subsequent PreFetch operations given 
 1850 **                                                                              that the read demands were not satisfied using 
 1851 **                                                                                      the FirstRead parameter.
 1852 **                                           The default value of 010b correlates to: Command Type Hardwired pre-fetch a
 1853 **                                                      mount Memory Read 3 cache lines Memory Read Line 3 cache lines 
 1854 **                                                              Memory Read Multiple 6 cache lines
 1855 ** 06:04       000b               FirstRead_Secondary Bus: 3-bit field indicating the multiplication factor to be used 
 1856 **                                                      in calculating the number of bytes to prefetch from 
 1857 **                                                              the primary bus interface on the initial PreFetch operation.
 1858 **                                           The default value of 000b correlates to: Command Type Hardwired pre-fetch amount 
 1859 **                                                      Memory Read 4 DWORDs Memory Read Line 1 cache line Memory Read Multiple 2 cache lines
 1860 ** 03:00      1111b                Staged Prefetch Enable: This field enables/disables the FirstRead/ReRead pre-fetch 
 1861 **                                                      algorithm for the secondary and the primary bus interfaces.
 1862 **                                                         Bit(3) is a ganged enable bit for REQ#/GNT#[7:3], and bits(2:0) provide individual
 1863 **                                                                            enable bits for REQ#/GNT#[2:0]. 
 1864 **                                                        (bit(2) is the enable bit for REQ#/GNT#[2], etc...)
 1865 **                                                                            1b: enables the staged pre-fetch feature
 1866 **                                                                            0b: disables staged pre-fetch,
 1867 **                                                         and hardwires read pre-fetch policy to the following for 
 1868 **                                                         Memory Read, 
 1869 **                                                         Memory Read Line, 
 1870 **                                                     and Memory Read Multiple commands: 
 1871 **                                                     Command Type Hardwired Pre-Fetch Amount...
 1872 **                                                                                      Memory Read 4 DWORDs
 1873 **                                                                                      Memory Read Line 1 cache line
 1874 **                                                                                      Memory Read Multiple 2 cache lines
 1875 ** NOTE: When the starting address is not cache line aligned, bridge pre-fetches Memory Read line commands 
 1876 ** only to the next higher cache line boundary.For non-cache line aligned Memory Read 
 1877 ** Multiple commands bridge pre-fetches only to the second cache line boundary encountered.
 1878 **==================================================================================
 1879 **  0x55-0x54: P_SERR# Assertion Control - SERR_CTL
 1880 ** Bit       Default                       Description
 1881 **  15          0b   Upstream Delayed Transaction Discard Timer Expired: Dictates the bridge behavior 
 1882 **                                              in response to its discarding of a delayed transaction that was initiated from the primary bus.
 1883 **                                                                       0b=bridge asserts P_SERR#.
 1884 **                                                                       1b=bridge does not assert P_SERR#
 1885 **  14          0b   Upstream Delayed/Split Read Watchdog Timer Expired: Dictates bridge behavior following expiration of the subject watchdog timer.
 1886 **                                                                       0b=bridge asserts P_SERR#.
 1887 **                                                                       1b=bridge does not assert P_SERR#
 1888 **  13          0b   Upstream Delayed/Split Write Watchdog Timer Expired: Dictates bridge behavior following expiration of the subject watchdog timer.
 1889 **                                                                       0b=bridge asserts P_SERR#.
 1890 **                                                                       1b=bridge does not assert P_SERR#
 1891 **  12          0b             Master Abort during Upstream Posted Write: Dictates bridge behavior following 
 1892 **                                              its having detected a Master Abort while attempting to retire one of its PMWs upstream.
 1893 **                                                                       0b=bridge asserts P_SERR#.
 1894 **                                                                       1b=bridge does not assert P_SERR#
 1895 **  11          0b             Target Abort during Upstream Posted Write: Dictates bridge behavior following 
 1896 **                                              its having been terminated with Target Abort while attempting to retire one of its PMWs upstream.
 1897 **                                                                       0b=bridge asserts P_SERR#.
 1898 **                                                                       1b=bridge does not assert P_SERR#
 1899 **  10          0b                  Upstream Posted Write Data Discarded: Dictates bridge behavior in the event that 
 1900 **                                              it discards an upstream posted write transaction.
 1901 **                                                                       0b=bridge asserts P_SERR#.
 1902 **                                                                       1b=bridge does not assert P_SERR#
 1903 **  09          0b               Upstream Posted Write Data Parity Error: Dictates bridge behavior 
 1904 **                                              when a data parity error is detected while attempting to retire on of its PMWs upstream.
 1905 **                                                                       0b=bridge asserts P_SERR#.
 1906 **                                                                       1b=bridge does not assert P_SERR#
 1907 **  08          0b                    Secondary Bus Address Parity Error: This bit dictates bridge behavior 
 1908 **                                              when it detects an address parity error on the secondary bus.
 1909 **                                                                       0b=bridge asserts P_SERR#.
 1910 **                                                                       1b=bridge does not assert P_SERR#
 1911 **  07          0b  Downstream Delayed Transaction Discard Timer Expired: Dictates bridge behavior in response to 
 1912 **                                              its discarding of a delayed transaction that was initiated on the secondary bus.
 1913 **                                                                       0b=bridge asserts P_SERR#.
 1914 **                                                                       1b=bridge does not assert P_SERR#
 1915 **  06          0b  Downstream Delayed/Split Read Watchdog Timer Expired: Dictates bridge behavior following expiration of the subject watchdog timer.
 1916 **                                                                       0b=bridge asserts P_SERR#.
 1917 **                                                                       1b=bridge does not assert P_SERR#
 1918 **  05          0b Downstream Delayed/Split Write Watchdog Timer Expired: Dictates bridge behavior following expiration of the subject watchdog timer.
 1919 **                                                                       0b=bridge asserts P_SERR#.
 1920 **                                                                       1b=bridge does not assert P_SERR#
 1921 **  04          0b           Master Abort during Downstream Posted Write: Dictates bridge behavior following 
 1922 **                                              its having detected a Master Abort while attempting to retire one of its PMWs downstream.
 1923 **                                                                       0b=bridge asserts P_SERR#.
 1924 **                                                                       1b=bridge does not assert P_SERR#
 1925 **  03          0b           Target Abort during Downstream Posted Write: Dictates bridge behavior following 
 1926 **                                              its having been terminated with Target Abort while attempting to retire one of its PMWs downstream.
 1927 **                                                                       0b=bridge asserts P_SERR#.
 1928 **                                                                       1b=bridge does not assert P_SERR#
 1929 **  02          0b                Downstream Posted Write Data Discarded: Dictates bridge behavior in the event 
 1930 **                                              that it discards a downstream posted write transaction.
 1931 **                                                                       0b=bridge asserts P_SERR#.
 1932 **                                                                       1b=bridge does not assert P_SERR#
 1933 **  01          0b             Downstream Posted Write Data Parity Error: Dictates bridge behavior 
 1934 **                                              when a data parity error is detected while attempting to retire on of its PMWs downstream.
 1935 **                                                                       0b=bridge asserts P_SERR#.
 1936 **                                                                       1b=bridge does not assert P_SERR#
 1937 **  00          0b                      Primary Bus Address Parity Error: This bit dictates bridge behavior 
 1938 **                                              when it detects an address parity error on the primary bus.
 1939 **                                                                       0b=bridge asserts P_SERR#.
 1940 **                                                                       1b=bridge does not assert P_SERR#
 1941 **===============================================================================
 1942 **  0x56: Pre-Boot Status Register - PBSR
 1943 ** Bit       Default                                                                            Description
 1944 ** 07           1                                                                                Reserved
 1945 ** 06           -                                                                                Reserved - value indeterminate
 1946 ** 05:02        0                                                                                Reserved
 1947 ** 01      Varies with External State of S_133EN at PCI Bus Reset    Secondary Bus Max Frequency Setting:
 1948 **                                                                       This bit reflect captured S_133EN strap, 
 1949 **                                                                              indicating the maximum secondary bus clock frequency when in PCI-X mode.
 1950 **                                                                   Max Allowable Secondary Bus Frequency
 1951 **                                                                                                                                                      **                                              S_133EN PCI-X Mode
 1952 **                                                                                                                                                      **                                              0 100 MHz
 1953 **                                                                                                                                                      **                                              1 133 MH
 1954 ** 00          0b                                                    Reserved
 1955 **===============================================================================
 1956 **  0x59-0x58: Secondary Decode Enable Register - SDER
 1957 ** Bit       Default                                                                            Description
 1958 ** 15:03      FFF1h                                                                              Preserved.
 1959 ** 02     Varies with External State of PRIVMEM at PCI Bus Reset   Private Memory Space Enable - when set, 
 1960 **                                                                      bridge overrides its secondary inverse decode logic and not
 1961 **                                                                 forward upstream any secondary bus initiated DAC Memory transactions with AD(63)=1b.
 1962 **                                                                 This creates a private memory space on the Secondary PCI bus 
 1963 **                                                                      that allows peer-to-peer transactions.
 1964 ** 01:00      10 2                                                   Preserved.
 1965 **===============================================================================
 1966 **  0x5D-0x5C: Secondary IDSEL Select Register - SISR
 1967 ** Bit       Default                                                                            Description
 1968 ** 15:10     000000 2                                                                            Reserved.
 1969 ** 09    Varies with External State of PRIVDEV at PCI Bus Reset     AD25- IDSEL Disable - When this bit is set, 
 1970 **                                                      AD25 is deasserted for any possible Type 1 to Type 0 conversion.
 1971 **                                                                                        When this bit is clear, 
 1972 **                                                      AD25 is asserted when Primary addresses AD[15:11]=01001 2 during a Type 1 to Type 0 conversion.
 1973 ** 08    Varies with External State of PRIVDEV at PCI Bus Reset     AD24- IDSEL Disable - When this bit is set, 
 1974 **                                                      AD24 is deasserted for any possible Type 1 to Type 0 conversion.
 1975 **                                                                                        When this bit is clear, 
 1976 **                                                      AD24 is asserted when Primary addresses AD[15:11]=01000 2 during a Type 1 to Type 0 conversion.
 1977 ** 07    Varies with External State of PRIVDEV at PCI Bus Reset     AD23- IDSEL Disable - When this bit is set, 
 1978 **                                                      AD23 is deasserted for any possible Type 1 to Type 0 conversion. 
 1979 **                                                                                        When this bit is clear, 
 1980 **                                                      AD23 is asserted when Primary addresses AD[15:11]=00111 2 during a Type 1 to Type 0 conversion.
 1981 ** 06    Varies with External State of PRIVDEV at PCI Bus Reset     AD22- IDSEL Disable - When this bit is set, 
 1982 **                                                      AD22 is deasserted for any possible Type 1 to Type 0 conversion.
 1983 **                                                                                        When this bit is clear, 
 1984 **                                                      AD22 is asserted when Primary addresses AD[15:11]=00110 2 during a Type 1 to Type 0 conversion.
 1985 ** 05    Varies with External State of PRIVDEV at PCI Bus Reset     AD21- IDSEL Disable - When this bit is set, 
 1986 **                                                      AD21 is deasserted for any possible Type 1 to Type 0 conversion.
 1987 **                                                                                        When this bit is clear, 
 1988 **                                                      AD21 is asserted when Primary addresses AD[15:11]=00101 2 during a Type 1 to Type 0 conversion.
 1989 ** 04    Varies with External State of PRIVDEV at PCI Bus Reset     AD20- IDSEL Disable - When this bit is set, 
 1990 **                                                      AD20 is deasserted for any possible Type 1 to Type 0 conversion.
 1991 **                                                                                        When this bit is clear, 
 1992 **                                                      AD20 is asserted when Primary addresses AD[15:11]=00100 2 during a Type 1 to Type 0 conversion.
 1993 ** 03    Varies with External State of PRIVDEV at PCI Bus Reset     AD19- IDSEL Disable - When this bit is set, 
 1994 **                                                      AD19 is deasserted for any possible Type 1 to Type 0 conversion.
 1995 **                                                                                        When this bit is clear,
 1996 **                                                      AD19 is asserted when Primary addresses AD[15:11]=00011 2 during a Type 1 to Type 0 conversion.
 1997 ** 02    Varies with External State of PRIVDEV at PCI Bus Reset     AD18- IDSEL Disable - When this bit is set, 
 1998 **                                                      AD18 is deasserted for any possible Type 1 to Type 0 conversion.
 1999 **                                                                                        When this bit is clear,
 2000 **                                                      AD18 is asserted when Primary addresses AD[15:11]=00010 2 during a Type 1 to Type 0 conversion.
 2001 ** 01    Varies with External State of PRIVDEV at PCI Bus Reset     AD17- IDSEL Disable - When this bit is set, 
 2002 **                                                      AD17 is deasserted for any possible Type 1 to Type 0 conversion.
 2003 **                                                                                        When this bit is clear, 
 2004 **                                                      AD17 is asserted when Primary addresses AD[15:11]=00001 2 during a Type 1 to Type 0 conversion.
 2005 ** 00    Varies with External State of PRIVDEV at PCI Bus Reset     AD16- IDSEL Disable - When this bit is set, 
 2006 **                                                      AD16 is deasserted for any possible Type 1 to Type 0 conversion.
 2007 **                                                                                        When this bit is clear, 
 2008 **                                                      AD16 is asserted when Primary addresses AD[15:11]=00000 2 during a Type 1 to Type 0 conversion.
 2009 **************************************************************************
 2010 */
 2011 /*
 2012 **************************************************************************
 2013 **                 Reserved      A8-CBh           
 2014 **************************************************************************
 2015 */
 2016 /*
 2017 **************************************************************************
 2018 **                  PCI Extended Enhanced Capabilities List CC-FFh
 2019 **************************************************************************
 2020 ** ----------------------------------------------------------------------------------------------------------
 2021 ** |    Byte 3              |         Byte 2         |        Byte 1          |       Byte 0              | Configu-ration Byte Offset
 2022 ** ----------------------------------------------------------------------------------------------------------
 2023 ** |           Power Management Capabilities         |        Next Item Ptr   |     Capability ID         | DCh
 2024 ** ----------------------------------------------------------------------------------------------------------
 2025 ** |        PM Data         |       PPB Support      |            Extensions Power Management CSR         | E0h
 2026 ** ----------------------------------------------------------------------------------------------------------
 2027 ** |                    Reserved                     |        Reserved        |        Reserved           | E4h
 2028 ** ----------------------------------------------------------------------------------------------------------
 2029 ** |                                              Reserved                                                | E8h
 2030 ** ----------------------------------------------------------------------------------------------------------
 2031 ** |       Reserved         |        Reserved        |        Reserved        |         Reserved          | ECh
 2032 ** ----------------------------------------------------------------------------------------------------------
 2033 ** |              PCI-X Secondary Status             |       Next Item Ptr    |       Capability ID       | F0h
 2034 ** ----------------------------------------------------------------------------------------------------------
 2035 ** |                                         PCI-X Bridge Status                                          | F4h
 2036 ** ----------------------------------------------------------------------------------------------------------
 2037 ** |                                PCI-X Upstream Split Transaction Control                              | F8h
 2038 ** ----------------------------------------------------------------------------------------------------------
 2039 ** |                               PCI-X Downstream Split Transaction Control                             | FCh
 2040 ** ----------------------------------------------------------------------------------------------------------
 2041 **===============================================================================
 2042 **  0xDC: Power Management Capabilities Identifier - PM_CAPID
 2043 ** Bit       Default                       Description
 2044 ** 07:00       01h                        Identifier (ID): PCI SIG assigned ID for PCI-PM register block
 2045 **===============================================================================
 2046 **  0xDD: Next Item Pointer - PM_NXTP
 2047 ** Bit       Default                       Description
 2048 ** 07:00       F0H                Next Capabilities Pointer (PTR): The register defaults to F0H pointing to the PCI-X Extended Capability Header.
 2049 **===============================================================================
 2050 **  0xDF-0xDE: Power Management Capabilities Register - PMCR
 2051 ** Bit       Default                       Description
 2052 ** 15:11       00h                     PME Supported (PME): PME# cannot be asserted by bridge.
 2053 ** 10           0h                 State D2 Supported (D2): Indicates no support for state D2. No power management action in this state.
 2054 ** 09           1h                 State D1 Supported (D1): Indicates support for state D1. No power management action in this state.
 2055 ** 08:06        0h                Auxiliary Current (AUXC): This 3 bit field reports the 3.3Vaux auxiliary current requirements for the PCI function. 
 2056 **                                                          This returns 000b as PME# wake-up for bridge is not implemented.
 2057 ** 05           0   Special Initialization Required (SINT): Special initialization is not required for bridge.
 2058 ** 04:03       00                            Reserved
 2059 ** 02:00       010                            Version (VS): Indicates that this supports PCI Bus Power Management Interface Specification, Revision 1.1.
 2060 **===============================================================================
 2061 **  0xE1-0xE0: Power Management Control / Status - Register - PMCSR
 2062 ** Bit       Default                       Description
 2063 ** 15:09       00h                          Reserved
 2064 ** 08          0b                          PME_Enable: This bit, when set to 1b enables bridge to assert PME#. 
 2065 **      Note that bridge never has occasion to assert PME# and implements this dummy R/W bit only for the purpose of working around an OS PCI-PM bug.
 2066 ** 07:02       00h                          Reserved
 2067 ** 01:00       00                Power State (PSTATE): This 2-bit field is used both to determine the current power state of 
 2068 **                                                                      a function and to set the Function into a new power state.
 2069 **                                                                                                      00 - D0 state
 2070 **                                                                                                      01 - D1 state
 2071 **                                                                                                      10 - D2 state
 2072 **                                                                                                      11 - D3 hot state
 2073 **===============================================================================
 2074 **  0xE2: Power Management Control / Status PCI to PCI Bridge Support - PMCSR_BSE
 2075 ** Bit       Default                       Description
 2076 ** 07          0         Bus Power/Clock Control Enable (BPCC_En): Indicates that the bus power/clock control policies have been disabled.
 2077 ** 06          0                B2/B3 support for D3 Hot (B2_B3#): The state of this bit determines the action that 
 2078 **                                                                      is to occur as a direct result of programming the function to D3 hot.
 2079 **                                                                 This bit is only meaningful when bit 7 (BPCC_En) is a ˇ§1ˇ¨.
 2080 ** 05:00     00h                            Reserved
 2081 **===============================================================================
 2082 **  0xE3: Power Management Data Register - PMDR
 2083 ** Bit       Default                       Description
 2084 ** 07:00       00h                          Reserved
 2085 **===============================================================================
 2086 **  0xF0: PCI-X Capabilities Identifier - PX_CAPID
 2087 ** Bit       Default                       Description
 2088 ** 07:00       07h                       Identifier (ID): Indicates this is a PCI-X capabilities list.
 2089 **===============================================================================
 2090 **  0xF1: Next Item Pointer - PX_NXTP
 2091 ** Bit       Default                       Description
 2092 ** 07:00       00h                     Next Item Pointer: Points to the next capability in the linked list The power on default value of this
 2093 **                                                        register is 00h indicating that this is the last entry in the linked list of capabilities.
 2094 **===============================================================================
 2095 **  0xF3-0xF2: PCI-X Secondary Status - PX_SSTS
 2096 ** Bit       Default                       Description
 2097 ** 15:09       00h                          Reserved
 2098 ** 08:06       Xxx                Secondary Clock Frequency (SCF): This field is set with the frequency of the secondary bus. 
 2099 **                                                                 The values are:
 2100 **                                                                                                                                                      **              BitsMax FrequencyClock Period
 2101 **                                                                                                                                                      **              000PCI ModeN/A
 2102 **                                                                                                                                                      **              00166 15
 2103 **                                                                                                                                                      **              01010010
 2104 **                                                                                                                                                      **              0111337.5
 2105 **                                                                                                                                                      **              1xxreservedreserved
 2106 **                                                                                                                                                      **              The default value for this register is the operating frequency of the secondary bus
 2107 ** 05           0b                   Split Request Delayed. (SRD):  This bit is supposed to be set by a bridge when it cannot forward a transaction on the
 2108 **                                              secondary bus to the primary bus because there is not enough room within the limit
 2109 **                                              specified in the Split Transaction Commitment Limit field in the Downstream Split
 2110 **                                              Transaction Control register. The bridge does not set this bit.
 2111 ** 04           0b                 Split Completion Overrun (SCO): This bit is supposed to be set when a bridge terminates a Split Completion on the ** **                                              secondary bus with retry or Disconnect at next ADB because its buffers are full. 
 2112 **                                              The bridge does not set this bit.
 2113 ** 03           0b              Unexpected Split Completion (USC): This bit is set when an unexpected split completion with a requester ID 
 2114 **                                              equal to bridge secondary bus number, device number 00h,
 2115 **                                              and function number 0 is received on the secondary interface. 
 2116 **                                              This bit is cleared by software writing a '1'.
 2117 ** 02           0b               Split Completion Discarded (SCD): This bit is set 
 2118 **                                              when bridge discards a split completion moving toward the secondary bus 
 2119 **                                              because the requester would not accept it. This bit cleared by software writing a '1'.
 2120 ** 01           1b                                133 MHz Capable: Indicates that bridge is capable of running its secondary bus at 133 MHz
 2121 ** 00           1b                            64-bit Device (D64): Indicates the width of the secondary bus as 64-bits.
 2122 **===============================================================================
 2123 **  0xF7-0xF6-0xf5-0xF4: PCI-X Bridge Status - PX_BSTS
 2124 ** Bit       Default                                                                                     Description
 2125 ** 31:22        0                                                                                         Reserved
 2126 ** 21           0                                                               Split Request Delayed (SRD): This bit does not be set by bridge.
 2127 ** 20           0                                                               Split Completion Overrun (SCO): This bit does not be set by bridge
 2128 **                                                                              because bridge throttles traffic on the completion side.
 2129 ** 19           0                                                               Unexpected Split Completion (USC): The bridge sets this bit to 1b 
 2130 **                                                                              when it encounters a corrupted Split Completion, possibly with an **    **                                                                              inconsistent remaining byte count.Software clears 
 2131 **                                                                              this bit by writing a 1b to it.
 2132 ** 18           0                                                               Split Completion Discarded (SCD): The bridge sets this bit to 1b 
 2133 **                                                                              when it has discarded a Split Completion.Software clears this bit by ** **                                                                              writing a 1b to it.
 2134 ** 17           1                                                               133 MHz Capable: This bit indicates that the bridge primary interface is **                                                                             capable of 133 MHz operation in PCI-X mode.
 2135 **                                                                              0=The maximum operating frequency is 66 MHz.
 2136 **                                                                              1=The maximum operating frequency is 133 MHz.
 2137 ** 16 Varies with the external state of P_32BITPCI# at PCI Bus Reset    64-bit Device (D64): Indicates bus width of the Primary PCI bus interface.
 2138 **                                                                               0=Primary Interface is connected as a 32-bit PCI bus.
 2139 **                                                                               1=Primary Interface is connected as a 64-bit PCI bus.
 2140 ** 15:08       00h                                                              Bus Number (BNUM): This field is simply an alias to the PBN field 
 2141 **                                                                                      of the BNUM register at offset 18h.
 2142 **                                                              Apparently it was deemed necessary reflect it here for diagnostic purposes.
 2143 ** 07:03       1fh                                              Device Number (DNUM): Indicates which IDSEL bridge consumes. 
 2144 **                                                              May be updated whenever a PCI-X
 2145 **                                                               configuration write cycle that targets bridge scores a hit.
 2146 ** 02:00        0h                                                   Function Number (FNUM): The bridge Function #
 2147 **===============================================================================
 2148 **  0xFB-0xFA-0xF9-0xF8: PCI-X Upstream Split Transaction Control - PX_USTC
 2149 ** Bit       Default                       Description
 2150 ** 31:16      003Eh                 Split Transaction Limit (STL): This register indicates the size of the commitment limit in units of ADQs.
 2151 **                                                                 Software is permitted to program this register to any value greater than or equal to
 2152 **                                                                 the contents of the Split Transaction Capacity register. A value less than the contents
 2153 **                                                                 of the Split Transaction Capacity register causes unspecified results.
 2154 **                                                                 A value of 003Eh or greater enables the bridge to forward all Split Requests of any
 2155 **                                                                 size regardless of the amount of buffer space available.
 2156 ** 15:00      003Eh              Split Transaction Capacity (STC): This read-only field indicates the size of the buffer (number of ADQs) for storing
 2157 **                                 split completions. This register controls behavior of the bridge buffers for forwarding
 2158 **                                 Split Transactions from a primary bus requester to a secondary bus completer.
 2159 **                                 The default value of 003Eh indicates there is available buffer space for 62 ADQs (7936 bytes).
 2160 **===============================================================================
 2161 **  0xFF-0xFE-0xFD-0xFC: PCI-X Downstream Split Transaction Control - PX_DSTC
 2162 ** Bit       Default                       Description
 2163 ** 31:16      003Eh                 Split Transaction Limit (STL):  This register indicates the size of the commitment limit in units of ADQs.
 2164 **                                                      Software is permitted to program this register to any value greater than or equal to
 2165 **                                                      the contents of the Split Transaction Capacity register. A value less than the contents
 2166 **                                                      of the Split Transaction Capacity register causes unspecified results.
 2167 **                                                      A value of 003Eh or greater enables the bridge to forward all Split Requests of any
 2168 **                                                      size regardless of the amount of buffer space available.
 2169 ** 15:00      003Eh              Split Transaction Capacity (STC): This read-only field indicates the size of the buffer (number of ADQs) for storing
 2170 **                                                                 split completions. This register controls behavior of the bridge buffers for forwarding
 2171 **                                                                 Split Transactions from a primary bus requester to a secondary bus completer.
 2172 **                                                                 The default value of 003Eh indicates there is available buffer space for 62 ADQs 
 2173 **                                                                      (7936 bytes).
 2174 **************************************************************************
 2175 */
 2176 
 2177 
 2178 
 2179 
 2180 /*
 2181 *************************************************************************************************************************************
 2182 **                       80331 Address Translation Unit Register Definitions
 2183 **                               ATU Interface Configuration Header Format
 2184 **               The ATU is programmed via a [Type 0] configuration command on the PCI interface.
 2185 *************************************************************************************************************************************
 2186 ** |    Byte 3              |         Byte 2         |        Byte 1          |       Byte 0              | Configuration Byte Offset
 2187 **===================================================================================================================================
 2188 ** |                ATU Device ID                    |                     Vendor ID                      | 00h
 2189 ** ----------------------------------------------------------------------------------------------------------
 2190 ** |                     Status                      |                     Command                        | 04H
 2191 ** ----------------------------------------------------------------------------------------------------------
 2192 ** |                              ATU Class Code                              |       Revision ID         | 08H
 2193 ** ----------------------------------------------------------------------------------------------------------
 2194 ** |         ATUBISTR       |     Header Type        |      Latency Timer     |      Cacheline Size       | 0CH
 2195 ** ----------------------------------------------------------------------------------------------------------
 2196 ** |                                     Inbound ATU Base Address 0                                       | 10H
 2197 ** ----------------------------------------------------------------------------------------------------------
 2198 ** |                               Inbound ATU Upper Base Address 0                                       | 14H
 2199 ** ----------------------------------------------------------------------------------------------------------
 2200 ** |                                     Inbound ATU Base Address 1                                       | 18H
 2201 ** ----------------------------------------------------------------------------------------------------------
 2202 ** |                               Inbound ATU Upper Base Address 1                                       | 1CH
 2203 ** ----------------------------------------------------------------------------------------------------------
 2204 ** |                                     Inbound ATU Base Address 2                                       | 20H
 2205 ** ----------------------------------------------------------------------------------------------------------
 2206 ** |                               Inbound ATU Upper Base Address 2                                       | 24H
 2207 ** ----------------------------------------------------------------------------------------------------------
 2208 ** |                                             Reserved                                                 | 28H   
 2209 ** ----------------------------------------------------------------------------------------------------------
 2210 ** |                ATU Subsystem ID                 |                ATU Subsystem Vendor ID             | 2CH
 2211 ** ----------------------------------------------------------------------------------------------------------
 2212 ** |                                       Expansion ROM Base Address                                     | 30H
 2213 ** ----------------------------------------------------------------------------------------------------------
 2214 ** |                                    Reserved Capabilities Pointer                                     | 34H
 2215 ** ----------------------------------------------------------------------------------------------------------
 2216 ** |                                             Reserved                                                 | 38H
 2217 ** ----------------------------------------------------------------------------------------------------------
 2218 ** |     Maximum Latency    |     Minimum Grant      |       Interrupt Pin    |      Interrupt Line       | 3CH
 2219 ** ----------------------------------------------------------------------------------------------------------
 2220 *********************************************************************************************************************
 2221 */
 2222 /*
 2223 ***********************************************************************************
 2224 **  ATU Vendor ID Register - ATUVID
 2225 **  -----------------------------------------------------------------
 2226 **  Bit       Default                       Description
 2227 **  15:00      8086H (0x17D3)               ATU Vendor ID - This is a 16-bit value assigned to Intel. 
 2228 **                                              This register, combined with the DID, uniquely identify the PCI device. 
 2229 **      Access type is Read/Write to allow the 80331 to configure the register as a different vendor ID 
 2230 **      to simulate the interface of a standard mechanism currently used by existing application software.
 2231 ***********************************************************************************
 2232 */
 2233 #define     ARCMSR_ATU_VENDOR_ID_REG                     0x00    /*word*/
 2234 /*
 2235 ***********************************************************************************
 2236 **  ATU Device ID Register - ATUDID
 2237 **  -----------------------------------------------------------------
 2238 **  Bit       Default                       Description
 2239 **  15:00      0336H (0x1110)               ATU Device ID - This is a 16-bit value assigned to the ATU. 
 2240 **      This ID, combined with the VID, uniquely identify any PCI device.
 2241 ***********************************************************************************
 2242 */
 2243 #define     ARCMSR_ATU_DEVICE_ID_REG                     0x02    /*word*/
 2244 /*
 2245 ***********************************************************************************
 2246 **  ATU Command Register - ATUCMD
 2247 **  -----------------------------------------------------------------
 2248 **  Bit       Default                       Description
 2249 **  15:11      000000 2                     Reserved
 2250 **  10           0                          Interrupt Disable - This bit disables 80331 from asserting the ATU interrupt signal.
 2251 **                                                              0=enables the assertion of interrupt signal.
 2252 **                                                              1=disables the assertion of its interrupt signal.
 2253 **  09          0 2                         Fast Back to Back Enable - When cleared, 
 2254 **                                              the ATU interface is not allowed to generate fast back-to-back cycles on its bus.
 2255 **                                              Ignored when operating in the PCI-X mode.
 2256 **  08          0 2                         SERR# Enable - When cleared, the ATU interface is not allowed to assert SERR# on the PCI interface.
 2257 **  07          1 2                         Address/Data Stepping Control - Address stepping is implemented for configuration transactions. The
 2258 **                                          ATU inserts 2 clock cycles of address stepping for Conventional Mode and 4 clock cycles 
 2259 **                                              of address stepping for PCI-X mode.
 2260 **  06          0 2                         Parity Error Response - When set, the ATU takes normal action when a parity error 
 2261 **                                              is detected. When cleared, parity checking is disabled.
 2262 **  05          0 2                         VGA Palette Snoop Enable - The ATU interface does not support I/O writes and therefore, 
 2263 **                                              does not perform VGA palette snooping.
 2264 **  04          0 2                         Memory Write and Invalidate Enable - When set, ATU may generate MWI commands. 
 2265 **                                              When clear, ATU use Memory Write commands instead of MWI. Ignored when operating in the PCI-X mode.
 2266 **  03          0 2                         Special Cycle Enable - The ATU interface does not respond to special cycle commands in any way. 
 2267 **                                              Not implemented and a reserved bit field.
 2268 **  02          0 2                         Bus Master Enable - The ATU interface can act as a master on the PCI bus. 
 2269 **                                              When cleared, disables the device from generating PCI accesses. 
 2270 **                                              When set, allows the device to behave as a PCI bus master.
 2271 **                                          When operating in the PCI-X mode, ATU initiates a split completion transaction regardless 
 2272 **                                              of the state of this bit.
 2273 **  01          0 2                         Memory Enable - Controls the ATU interfaceˇ¦s response to PCI memory addresses. 
 2274 **                                              When cleared, the ATU interface does not respond to any memory access on the PCI bus.
 2275 **  00          0 2                         I/O Space Enable - Controls the ATU interface response to I/O transactions. 
 2276 **                                              Not implemented and a reserved bit field.
 2277 ***********************************************************************************
 2278 */
 2279 #define     ARCMSR_ATU_COMMAND_REG                       0x04    /*word*/
 2280 /*
 2281 ***********************************************************************************
 2282 **  ATU Status Register - ATUSR (Sheet 1 of 2)
 2283 **  -----------------------------------------------------------------
 2284 **  Bit       Default                       Description
 2285 **  15          0 2                         Detected Parity Error - set when a parity error is detected in data received by the ATU on the PCI bus even
 2286 **                                      when the ATUCMD registerˇ¦s Parity Error Response bit is cleared. Set under the following conditions:
 2287 **                                                                              ˇE Write Data Parity Error when the ATU is a target (inbound write).
 2288 **                                                                              ˇE Read Data Parity Error when the ATU is a requester (outbound read).
 2289 **                                                                              ˇE Any Address or Attribute (PCI-X Only) Parity Error on the Bus **     ** **                                                           (including one generated by the ATU).
 2290 **  14          0 2                         SERR# Asserted - set when SERR# is asserted on the PCI bus by the ATU.
 2291 **  13          0 2                         Master Abort - set when a transaction initiated by the ATU PCI master interface, ends in a Master-Abort
 2292 **                                          or when the ATU receives a Master Abort Split Completion Error Message in PCI-X mode.
 2293 **  12          0 2                         Target Abort (master) - set when a transaction initiated by the ATU PCI master interface, ends in a target
 2294 **                                          abort or when the ATU receives a Target Abort Split Completion Error Message in PCI-X mode.
 2295 **  11          0 2                         Target Abort (target) - set when the ATU interface, acting as a target, 
 2296 **                                              terminates the transaction on the PCI bus with a target abort.
 2297 **  10:09       01 2                        DEVSEL# Timing - These bits are read-only and define the slowest DEVSEL# 
 2298 **                                              timing for a target device in Conventional PCI Mode regardless of the operating mode 
 2299 **                                                      (except configuration accesses).
 2300 **                                                                              00 2=Fast
 2301 **                                                                              01 2=Medium
 2302 **                                                                              10 2=Slow
 2303 **                                                                              11 2=Reserved
 2304 **                                          The ATU interface uses Medium timing.
 2305 **  08           0 2                        Master Parity Error - The ATU interface sets this bit under the following conditions:
 2306 **                                                                              ˇE The ATU asserted PERR# itself or the ATU observed PERR# asserted.
 2307 **                                                                              ˇE And the ATU acted as the requester 
 2308 **                                                                                      for the operation in which the error occurred.
 2309 **                                                                              ˇE And the ATUCMD registerˇ¦s Parity Error Response bit is set
 2310 **                                                                              ˇE Or (PCI-X Mode Only) the ATU received a Write Data Parity Error Message
 2311 **                                                                              ˇE And the ATUCMD registerˇ¦s Parity Error Response bit is set
 2312 **  07           1 2  (Conventional mode)
 2313 **               0 2  (PCI-X mode)
 2314 **                                                      Fast Back-to-Back - The ATU/Messaging Unit interface is capable of accepting fast back-to-back
 2315 **                                                      transactions in Conventional PCI mode when the transactions are not to the same target. Since fast
 2316 **                                                      back-to-back transactions do not exist in PCI-X mode, this bit is forced to 0 in the PCI-X mode.
 2317 **  06           0 2                        UDF Supported - User Definable Features are not supported
 2318 **  05           1 2                        66 MHz. Capable - 66 MHz operation is supported.
 2319 **  04           1 2                        Capabilities - When set, this function implements extended capabilities.
 2320 **  03             0                        Interrupt Status - reflects the state of the ATU interrupt 
 2321 **                                              when the Interrupt Disable bit in the command register is a 0.
 2322 **                                                                              0=ATU interrupt signal deasserted.
 2323 **                                                                              1=ATU interrupt signal asserted.
 2324 **              NOTE: Setting the Interrupt Disable bit to a 1 has no effect on the state of this bit. Refer to
 2325 **              Section 3.10.23, ˇ§ATU Interrupt Pin Register - ATUIPRˇ¨ on page 236 for details on the ATU
 2326 **                                                                              interrupt signal.
 2327 **  02:00      00000 2                      Reserved.
 2328 ***********************************************************************************
 2329 */
 2330 #define     ARCMSR_ATU_STATUS_REG                        0x06    /*word*/
 2331 /*
 2332 ***********************************************************************************
 2333 **  ATU Revision ID Register - ATURID
 2334 **  -----------------------------------------------------------------
 2335 **  Bit       Default                       Description
 2336 **  07:00        00H                        ATU Revision - identifies the 80331 revision number.
 2337 ***********************************************************************************
 2338 */
 2339 #define     ARCMSR_ATU_REVISION_REG                      0x08    /*byte*/
 2340 /*
 2341 ***********************************************************************************
 2342 **  ATU Class Code Register - ATUCCR
 2343 **  -----------------------------------------------------------------
 2344 **  Bit       Default                       Description
 2345 **  23:16        05H                        Base Class - Memory Controller
 2346 **  15:08        80H                        Sub Class - Other Memory Controller
 2347 **  07:00        00H                        Programming Interface - None defined
 2348 ***********************************************************************************
 2349 */
 2350 #define     ARCMSR_ATU_CLASS_CODE_REG                    0x09    /*3bytes 0x0B,0x0A,0x09*/
 2351 /*
 2352 ***********************************************************************************
 2353 **  ATU Cacheline Size Register - ATUCLSR
 2354 **  -----------------------------------------------------------------
 2355 **  Bit       Default                       Description
 2356 **  07:00        00H                        ATU Cacheline Size - specifies the system cacheline size in DWORDs. Cacheline size is restricted to either 0, 8 or 16 DWORDs.
 2357 ***********************************************************************************
 2358 */
 2359 #define     ARCMSR_ATU_CACHELINE_SIZE_REG                        0x0C    /*byte*/
 2360 /*
 2361 ***********************************************************************************
 2362 **  ATU Latency Timer Register - ATULT
 2363 **  -----------------------------------------------------------------
 2364 **  Bit       Default                       Description
 2365 **  07:03     00000 2   (for Conventional mode)
 2366 **            01000 2   (for PCI-X mode)
 2367 **                      Programmable Latency Timer - This field varies the latency timer for the interface from 0 to 248 clocks.
 2368 **                      The default value is 0 clocks for Conventional PCI mode, and 64 clocks for PCI-X mode.
 2369 **  02:00       000 2   Latency Timer Granularity - These Bits are read only giving a programmable granularity of 8 clocks for the latency timer.
 2370 ***********************************************************************************
 2371 */
 2372 #define     ARCMSR_ATU_LATENCY_TIMER_REG                         0x0D    /*byte*/
 2373 /*
 2374 ***********************************************************************************
 2375 **  ATU Header Type Register - ATUHTR
 2376 **  -----------------------------------------------------------------
 2377 **  Bit       Default                       Description
 2378 **  07           0 2                        Single Function/Multi-Function Device - Identifies the 80331 as a single-function PCI device.
 2379 **  06:00   000000 2                        PCI Header Type - This bit field indicates the type of PCI header implemented. The ATU interface
 2380 **                                          header conforms to PCI Local Bus Specification, Revision 2.3.
 2381 ***********************************************************************************
 2382 */
 2383 #define     ARCMSR_ATU_HEADER_TYPE_REG                   0x0E    /*byte*/
 2384 /*
 2385 ***********************************************************************************
 2386 **  ATU BIST Register - ATUBISTR
 2387 **
 2388 **  The ATU BIST Register controls the functions the Intel XScale core performs when BIST is
 2389 **  initiated. This register is the interface between the host processor requesting BIST functions and
 2390 **  the 80331 replying with the results from the software implementation of the BIST functionality.
 2391 **  -----------------------------------------------------------------
 2392 **  Bit       Default                       Description
 2393 **  07           0 2                        BIST Capable - This bit value is always equal to the ATUCR ATU BIST Interrupt Enable bit. 
 2394 **  06           0 2                        Start BIST - When the ATUCR BIST Interrupt Enable bit is set:
 2395 **                               Setting this bit generates an interrupt to the Intel XScale core to perform a software BIST function.
 2396 **                               The Intel XScale core clears this bit when the BIST software has completed with the BIST results
 2397 **                               found in ATUBISTR register bits [3:0].
 2398 **                               When the ATUCR BIST Interrupt Enable bit is clear:
 2399 **                               Setting this bit does not generate an interrupt to the Intel XScale core and no BIST functions is performed. 
 2400 **                                                       The Intel XScale core does not clear this bit.
 2401 **  05:04       00 2             Reserved
 2402 **  03:00     0000 2             BIST Completion Code - when the ATUCR BIST Interrupt Enable bit is set and the ATUBISTR Start BIST bit is set (bit 6):
 2403 **                               The Intel XScale  core places the results of the software BIST in these bits. 
 2404 **                               A nonzero value indicates a device-specific error.
 2405 ***********************************************************************************
 2406 */
 2407 #define     ARCMSR_ATU_BIST_REG                  0x0F    /*byte*/
 2408 
 2409 /*
 2410 ***************************************************************************************  
 2411 **            ATU Base Registers and Associated Limit Registers
 2412 ***************************************************************************************
 2413 **           Base Address                         Register Limit                          Register Description
 2414 **  Inbound ATU Base Address Register 0           Inbound ATU Limit Register 0            Defines the inbound translation window 0 from the PCI bus.
 2415 **  Inbound ATU Upper Base Address Register 0     N/A                                     Together with ATU Base Address Register 0 defines the inbound **                                                              translation window 0 from the PCI bus for DACs.
 2416 **  Inbound ATU Base Address Register 1           Inbound ATU Limit Register 1            Defines inbound window 1 from the PCI bus.
 2417 **  Inbound ATU Upper Base Address Register 1     N/A                                     Together with ATU Base Address Register 1 defines inbound window **  1 from the PCI bus for DACs.
 2418 **  Inbound ATU Base Address Register 2           Inbound ATU Limit Register 2            Defines the inbound translation window 2 from the PCI bus.
 2419 **  Inbound ATU Upper Base Address Register 2     N/A                                     Together with ATU Base Address Register 2 defines the inbound ** **  translation window 2 from the PCI bus for DACs.
 2420 **  Inbound ATU Base Address Register 3           Inbound ATU Limit Register 3            Defines the inbound translation window 3 from the PCI bus.
 2421 **  Inbound ATU Upper Base Address Register 3     N/A                                     Together with ATU Base Address Register 3 defines the inbound ** **  translation window 3 from the PCI bus for DACs.
 2422 **     NOTE: This is a private BAR that resides outside of the standard PCI configuration header space (offsets 00H-3FH).
 2423 **  Expansion ROM Base Address Register           Expansion ROM Limit Register            Defines the window of addresses used by a bus master for reading **  from an Expansion ROM.
 2424 **--------------------------------------------------------------------------------------
 2425 **  ATU Inbound Window 1 is not a translate window. 
 2426 **  The ATU does not claim any PCI accesses that fall within this range. 
 2427 **  This window is used to allocate host memory for use by Private Devices. 
 2428 **  When enabled, the ATU interrupts the Intel  XScale core when either the IABAR1 register or the IAUBAR1 register is written from the PCI bus. 
 2429 ***********************************************************************************
 2430 */
 2431 
 2432 /*
 2433 ***********************************************************************************
 2434 **  Inbound ATU Base Address Register 0 - IABAR0
 2435 **
 2436 **  . The Inbound ATU Base Address Register 0 (IABAR0) together with the Inbound ATU Upper Base Address Register 0 (IAUBAR0) 
 2437 **    defines the block of memory addresses where the inbound translation window 0 begins. 
 2438 **  . The inbound ATU decodes and forwards the bus request to the 80331 internal bus with a translated address to map into 80331 local memory. 
 2439 **  . The IABAR0 and IAUBAR0 define the base address and describes the required memory block size.
 2440 **  . Bits 31 through 12 of the IABAR0 is either read/write bits or read only with a value of 0 
 2441 **    depending on the value located within the IALR0. 
 2442 **    This configuration allows the IABAR0 to be programmed per PCI Local Bus Specification.
 2443 **    The first 4 Kbytes of memory defined by the IABAR0, IAUBAR0 and the IALR0 is reserved for the Messaging Unit.
 2444 **    The programmed value within the base address register must comply with the PCI programming requirements for address alignment. 
 2445 **  Warning: 
 2446 **    When IALR0 is cleared prior to host configuration:
 2447 **                          the user should also clear the Prefetchable Indicator and the Type Indicator. 
 2448 **    Assuming IALR0 is not cleared:
 2449 **                          a. Since non prefetchable memory windows can never be placed above the 4 Gbyte address boundary,
 2450 **                             when the Prefetchable Indicator is cleared prior to host configuration, 
 2451 **                             the user should also set the Type Indicator for 32 bit addressability.
 2452 **                          b. For compliance to the PCI-X Addendum to the PCI Local Bus Specification,
 2453 **                             when the Prefetchable Indicator is set prior to host configuration, the user
 2454 **                             should also set the Type Indicator for 64 bit addressability. 
 2455 **                             This is the default for IABAR0.
 2456 **  -----------------------------------------------------------------
 2457 **  Bit       Default                       Description
 2458 **  31:12     00000H                        Translation Base Address 0 - These bits define the actual location 
 2459 **                                              the translation function is to respond to when addressed from the PCI bus.
 2460 **  11:04        00H                        Reserved.
 2461 **  03           1 2                        Prefetchable Indicator - When set, defines the memory space as prefetchable.
 2462 **  02:01       10 2                        Type Indicator - Defines the width of the addressability for this memory window:
 2463 **                                              00 - Memory Window is locatable anywhere in 32 bit address space
 2464 **                                              10 - Memory Window is locatable anywhere in 64 bit address space
 2465 **  00           0 2                        Memory Space Indicator - This bit field describes memory or I/O space base address. 
 2466 **                                                                   The ATU does not occupy I/O space, 
 2467 **                                                                   thus this bit must be zero.
 2468 ***********************************************************************************
 2469 */
 2470 #define     ARCMSR_INBOUND_ATU_BASE_ADDRESS0_REG                         0x10    /*dword 0x13,0x12,0x11,0x10*/
 2471 #define     ARCMSR_INBOUND_ATU_MEMORY_PREFETCHABLE                       0x08
 2472 #define     ARCMSR_INBOUND_ATU_MEMORY_WINDOW64                           0x04
 2473 /*
 2474 ***********************************************************************************
 2475 **  Inbound ATU Upper Base Address Register 0 - IAUBAR0
 2476 **
 2477 **  This register contains the upper base address when decoding PCI addresses beyond 4 GBytes.
 2478 **  Together with the Translation Base Address this register defines the actual location the translation
 2479 **  function is to respond to when addressed from the PCI bus for addresses > 4GBytes (for DACs).
 2480 **  The programmed value within the base address register must comply with the PCI programming requirements for address alignment. 
 2481 **  Note: 
 2482 **      When the Type indicator of IABAR0 is set to indicate 32 bit addressability, 
 2483 **      the IAUBAR0 register attributes are read-only.
 2484 **  -----------------------------------------------------------------
 2485 **  Bit       Default                       Description
 2486 **  31:0      00000H                        Translation Upper Base Address 0 - Together with the Translation Base Address 0 these bits define the
 2487 **                           actual location the translation function is to respond to when addressed from the PCI bus for addresses > 4GBytes.
 2488 ***********************************************************************************
 2489 */
 2490 #define     ARCMSR_INBOUND_ATU_UPPER_BASE_ADDRESS0_REG               0x14    /*dword 0x17,0x16,0x15,0x14*/
 2491 /*
 2492 ***********************************************************************************
 2493 **  Inbound ATU Base Address Register 1 - IABAR1
 2494 **
 2495 **  . The Inbound ATU Base Address Register (IABAR1) together with the Inbound ATU Upper Base Address Register 1 (IAUBAR1) 
 2496 **    defines the block of memory addresses where the inbound translation window 1 begins. 
 2497 **  . This window is used merely to allocate memory on the PCI bus and, the ATU does not process any PCI bus transactions to this memory range.
 2498 **  . The programmed value within the base address register must comply with the PCI programming requirements for address alignment. 
 2499 **  . When enabled, the ATU interrupts the Intel XScale core when the IABAR1 register is written from the PCI bus. 
 2500 **    Warning: 
 2501 **    When a non-zero value is not written to IALR1 prior to host configuration, 
 2502 **                          the user should not set either the Prefetchable Indicator or the Type Indicator for 64 bit addressability. 
 2503 **                          This is the default for IABAR1.
 2504 **    Assuming a non-zero value is written to IALR1, 
 2505 **                                      the user may set the Prefetchable Indicator 
 2506 **                                                    or the Type         Indicator:
 2507 **                                              a. Since non prefetchable memory windows can never be placed above the 4 Gbyte address
 2508 **                                                 boundary, when the Prefetchable Indicator is not set prior to host configuration, 
 2509 **                             the user should also leave the Type Indicator set for 32 bit addressability. 
 2510 **                             This is the default for IABAR1.
 2511 **                                              b. when the Prefetchable Indicator is set prior to host configuration, 
 2512 **                             the user should also set the Type Indicator for 64 bit addressability.
 2513 **  -----------------------------------------------------------------
 2514 **  Bit       Default                       Description
 2515 **  31:12     00000H                        Translation Base Address 1 - These bits define the actual location of window 1 on the PCI bus.
 2516 **  11:04        00H                        Reserved.
 2517 **  03           0 2                        Prefetchable Indicator - When set, defines the memory space as prefetchable.
 2518 **  02:01       00 2                        Type Indicator - Defines the width of the addressability for this memory window:
 2519 **                      00 - Memory Window is locatable anywhere in 32 bit address space
 2520 **                      10 - Memory Window is locatable anywhere in 64 bit address space
 2521 **  00           0 2                        Memory Space Indicator - This bit field describes memory or I/O space base address. 
 2522 **                                                                   The ATU does not occupy I/O space, 
 2523 **                                                                   thus this bit must be zero.
 2524 ***********************************************************************************
 2525 */
 2526 #define     ARCMSR_INBOUND_ATU_BASE_ADDRESS1_REG                         0x18    /*dword 0x1B,0x1A,0x19,0x18*/
 2527 /*
 2528 ***********************************************************************************
 2529 **  Inbound ATU Upper Base Address Register 1 - IAUBAR1
 2530 **
 2531 **  This register contains the upper base address when locating this window for PCI addresses beyond 4 GBytes. 
 2532 **  Together with the IABAR1 this register defines the actual location for this memory window for addresses > 4GBytes (for DACs). 
 2533 **  This window is used merely to allocate memory on the PCI bus and, the ATU does not process any PCI bus transactions to this memory range.
 2534 **  The programmed value within the base address register must comply with the PCI programming
 2535 **  requirements for address alignment. 
 2536 **  When enabled, the ATU interrupts the Intel XScale core when the IAUBAR1 register is written
 2537 **  from the PCI bus. 
 2538 **  Note: 
 2539 **      When the Type indicator of IABAR1 is set to indicate 32 bit addressability, 
 2540 **      the IAUBAR1 register attributes are read-only. 
 2541 **      This is the default for IABAR1.
 2542 **  -----------------------------------------------------------------
 2543 **  Bit       Default                       Description
 2544 **  31:0      00000H                        Translation Upper Base Address 1 - Together with the Translation Base Address 1 
 2545 **                                              these bits define the actual location for this memory window on the PCI bus for addresses > 4GBytes.
 2546 ***********************************************************************************
 2547 */
 2548 #define     ARCMSR_INBOUND_ATU_UPPER_BASE_ADDRESS1_REG                   0x1C    /*dword 0x1F,0x1E,0x1D,0x1C*/
 2549 /*
 2550 ***********************************************************************************
 2551 **  Inbound ATU Base Address Register 2 - IABAR2
 2552 **
 2553 **  . The Inbound ATU Base Address Register 2 (IABAR2) together with the Inbound ATU Upper Base Address Register 2 (IAUBAR2) 
 2554 **           defines the block of memory addresses where the inbound translation window 2 begins. 
 2555 **  . The inbound ATU decodes and forwards the bus request to the 80331 internal bus with a translated address to map into 80331 local memory. 
 2556 **  . The IABAR2 and IAUBAR2 define the base address and describes the required memory block size
 2557 **  . Bits 31 through 12 of the IABAR2 is either read/write bits or read only with a value of 0 depending on the value located within the IALR2.
 2558 **    The programmed value within the base address register must comply with the PCI programming requirements for address alignment. 
 2559 **  Warning: 
 2560 **    When a non-zero value is not written to IALR2 prior to host configuration, 
 2561 **                          the user should not set either the Prefetchable Indicator 
 2562 **                                                      or the Type         Indicator for 64 bit addressability. 
 2563 **                          This is the default for IABAR2.
 2564 **  Assuming a non-zero value is written to IALR2, 
 2565 **                          the user may set the Prefetchable Indicator 
 2566 **                                        or the Type         Indicator:
 2567 **                                              a. Since non prefetchable memory windows can never be placed above the 4 Gbyte address boundary, 
 2568 **                             when the Prefetchable Indicator is not set prior to host configuration, 
 2569 **                             the user should also leave the Type Indicator set for 32 bit addressability. 
 2570 **                             This is the default for IABAR2.
 2571 **                                              b. when the Prefetchable Indicator is set prior to host configuration, 
 2572 **                             the user should also set the Type Indicator for 64 bit addressability.
 2573 **  -----------------------------------------------------------------
 2574 **  Bit       Default                       Description
 2575 **  31:12     00000H                        Translation Base Address 2 - These bits define the actual location 
 2576 **                                              the translation function is to respond to when addressed from the PCI bus.
 2577 **  11:04        00H                        Reserved.
 2578 **  03           0 2                        Prefetchable Indicator - When set, defines the memory space as prefetchable.
 2579 **  02:01       00 2                        Type Indicator - Defines the width of the addressability for this memory window:
 2580 **                      00 - Memory Window is locatable anywhere in 32 bit address space
 2581 **                      10 - Memory Window is locatable anywhere in 64 bit address space
 2582 **  00           0 2                        Memory Space Indicator - This bit field describes memory or I/O space base address. 
 2583 **                                                                   The ATU does not occupy I/O space, 
 2584 **                                                                   thus this bit must be zero.
 2585 ***********************************************************************************
 2586 */
 2587 #define     ARCMSR_INBOUND_ATU_BASE_ADDRESS2_REG                         0x20    /*dword 0x23,0x22,0x21,0x20*/
 2588 /*
 2589 ***********************************************************************************
 2590 **  Inbound ATU Upper Base Address Register 2 - IAUBAR2
 2591 **
 2592 **  This register contains the upper base address when decoding PCI addresses beyond 4 GBytes.
 2593 **  Together with the Translation Base Address this register defines the actual location 
 2594 **  the translation function is to respond to when addressed from the PCI bus for addresses > 4GBytes (for DACs).
 2595 **  The programmed value within the base address register must comply with the PCI programming
 2596 **  requirements for address alignment.
 2597 **  Note: 
 2598 **      When the Type indicator of IABAR2 is set to indicate 32 bit addressability,
 2599 **      the IAUBAR2 register attributes are read-only. 
 2600 **      This is the default for IABAR2.
 2601 **  -----------------------------------------------------------------
 2602 **  Bit       Default                       Description
 2603 **  31:0      00000H                        Translation Upper Base Address 2 - Together with the Translation Base Address 2 
 2604 **                                          these bits define the actual location the translation function is to respond to 
 2605 **                                          when addressed from the PCI bus for addresses > 4GBytes.
 2606 ***********************************************************************************
 2607 */
 2608 #define     ARCMSR_INBOUND_ATU_UPPER_BASE_ADDRESS2_REG                   0x24    /*dword 0x27,0x26,0x25,0x24*/
 2609 /*
 2610 ***********************************************************************************
 2611 **  ATU Subsystem Vendor ID Register - ASVIR
 2612 **  -----------------------------------------------------------------
 2613 **  Bit       Default                       Description
 2614 **  15:0      0000H                         Subsystem Vendor ID - This register uniquely identifies the add-in board or subsystem vendor.
 2615 ***********************************************************************************
 2616 */
 2617 #define     ARCMSR_ATU_SUBSYSTEM_VENDOR_ID_REG                   0x2C    /*word 0x2D,0x2C*/
 2618 /*
 2619 ***********************************************************************************
 2620 **  ATU Subsystem ID Register - ASIR
 2621 **  -----------------------------------------------------------------
 2622 **  Bit       Default                       Description
 2623 **  15:0      0000H                         Subsystem ID - uniquely identifies the add-in board or subsystem.
 2624 ***********************************************************************************
 2625 */
 2626 #define     ARCMSR_ATU_SUBSYSTEM_ID_REG                  0x2E    /*word 0x2F,0x2E*/
 2627 /*
 2628 ***********************************************************************************
 2629 **  Expansion ROM Base Address Register -ERBAR
 2630 **  -----------------------------------------------------------------
 2631 **  Bit       Default                       Description
 2632 **  31:12     00000H                        Expansion ROM Base Address - These bits define the actual location 
 2633 **                                              where the Expansion ROM address window resides when addressed from the PCI bus on any 4 Kbyte boundary.
 2634 **  11:01     000H                          Reserved
 2635 **  00        0 2                           Address Decode Enable - This bit field shows the ROM address 
 2636 **                                              decoder is enabled or disabled. When cleared, indicates the address decoder is disabled.
 2637 ***********************************************************************************
 2638 */
 2639 #define     ARCMSR_EXPANSION_ROM_BASE_ADDRESS_REG                        0x30    /*dword 0x33,0x32,0v31,0x30*/
 2640 #define     ARCMSR_EXPANSION_ROM_ADDRESS_DECODE_ENABLE                       0x01    
 2641 /*
 2642 ***********************************************************************************
 2643 **  ATU Capabilities Pointer Register - ATU_CAP_PTR
 2644 **  -----------------------------------------------------------------
 2645 **  Bit Default Description
 2646 **  07:00     C0H                           Capability List Pointer - This provides an offset in this functionˇ¦s configuration space 
 2647 **                                              that points to the 80331 PCl Bus Power Management extended capability.
 2648 ***********************************************************************************
 2649 */
 2650 #define     ARCMSR_ATU_CAPABILITY_PTR_REG                    0x34    /*byte*/
 2651 /*
 2652 ***********************************************************************************  
 2653 **  Determining Block Sizes for Base Address Registers
 2654 **  The required address size and type can be determined by writing ones to a base address register and
 2655 **  reading from the registers. By scanning the returned value from the least-significant bit of the base
 2656 **  address registers upwards, the programmer can determine the required address space size. The
 2657 **  binary-weighted value of the first non-zero bit found indicates the required amount of space.
 2658 **  Table 105 describes the relationship between the values read back and the byte sizes the base
 2659 **  address register requires.
 2660 **  As an example, assume that FFFF.FFFFH is written to the ATU Inbound Base Address Register 0
 2661 **  (IABAR0) and the value read back is FFF0.0008H. Bit zero is a zero, so the device requires
 2662 **  memory address space. Bit three is one, so the memory does supports prefetching. Scanning
 2663 **  upwards starting at bit four, bit twenty is the first one bit found. The binary-weighted value of this
 2664 **  bit is 1,048,576, indicated that the device requires 1 Mbyte of memory space.
 2665 **  The ATU Base Address Registers and the Expansion ROM Base Address Register use their
 2666 **  associated limit registers to enable which bits within the base address register are read/write and
 2667 **  which bits are read only (0). This allows the programming of these registers in a manner similar to
 2668 **  other PCI devices even though the limit is variable.
 2669 **  Table 105. Memory Block Size Read Response
 2670 **  Response After Writing all 1s
 2671 **  to the Base Address Register
 2672 **  Size
 2673 **  (Bytes)
 2674 **  Response After Writing all 1s
 2675 **  to the Base Address Register
 2676 **  Size
 2677 **  (Bytes)
 2678 **  FFFFFFF0H 16 FFF00000H 1 M
 2679 **  FFFFFFE0H 32 FFE00000H 2 M
 2680 **  FFFFFFC0H 64 FFC00000H 4 M
 2681 **  FFFFFF80H 128 FF800000H 8 M
 2682 **  FFFFFF00H 256 FF000000H 16 M
 2683 **  FFFFFE00H 512 FE000000H 32 M
 2684 **  FFFFFC00H 1K FC000000H 64 M
 2685 **  FFFFF800H 2K F8000000H 128 M
 2686 **  FFFFF000H 4K F0000000H 256 M
 2687 **  FFFFE000H 8K E0000000H 512 M
 2688 **  FFFFC000H 16K C0000000H 1 G
 2689 **  FFFF8000H 32K 80000000H 2 G
 2690 **  FFFF0000H 64K
 2691 **  00000000H
 2692 **  Register not
 2693 **  imple-mented,
 2694 **  no
 2695 **  address
 2696 **  space
 2697 **  required.
 2698 **  FFFE0000H 128K
 2699 **  FFFC0000H 256K
 2700 **  FFF80000H 512K
 2701 **
 2702 ***************************************************************************************  
 2703 */
 2704 
 2705 
 2706 
 2707 /*
 2708 ***********************************************************************************
 2709 **  ATU Interrupt Line Register - ATUILR
 2710 **  -----------------------------------------------------------------
 2711 **  Bit       Default                       Description
 2712 **  07:00       FFH                         Interrupt Assigned - system-assigned value identifies which system interrupt controllerˇ¦s interrupt
 2713 **                                                               request line connects to the device's PCI interrupt request lines 
 2714 **                                                              (as specified in the interrupt pin register).
 2715 **                                                               A value of FFH signifies ˇ§no connectionˇ¨ or ˇ§unknownˇ¨.
 2716 ***********************************************************************************
 2717 */
 2718 #define     ARCMSR_ATU_INTERRUPT_LINE_REG                    0x3C    /*byte*/
 2719 /*
 2720 ***********************************************************************************
 2721 **  ATU Interrupt Pin Register - ATUIPR
 2722 **  -----------------------------------------------------------------
 2723 **  Bit       Default                       Description
 2724 **  07:00       01H                         Interrupt Used - A value of 01H signifies that the ATU interface unit uses INTA# as the interrupt pin.
 2725 ***********************************************************************************
 2726 */
 2727 #define     ARCMSR_ATU_INTERRUPT_PIN_REG                     0x3D    /*byte*/
 2728 /*
 2729 ***********************************************************************************
 2730 **  ATU Minimum Grant Register - ATUMGNT
 2731 **  -----------------------------------------------------------------
 2732 **  Bit       Default                       Description
 2733 **  07:00       80H                         This register specifies how long a burst period the device needs in increments of 8 PCI clocks.
 2734 ***********************************************************************************
 2735 */
 2736 #define     ARCMSR_ATU_MINIMUM_GRANT_REG                     0x3E    /*byte*/
 2737 /*
 2738 ***********************************************************************************
 2739 **  ATU Maximum Latency Register - ATUMLAT
 2740 **  -----------------------------------------------------------------
 2741 **  Bit       Default                       Description
 2742 **  07:00       00H                         Specifies frequency (how often) the device needs to access the PCI bus 
 2743 **                                              in increments of 8 PCI clocks. A zero value indicates the device has no stringent requirement.
 2744 ***********************************************************************************
 2745 */
 2746 #define     ARCMSR_ATU_MAXIMUM_LATENCY_REG                   0x3F    /*byte*/
 2747 /*
 2748 ***********************************************************************************
 2749 **  Inbound Address Translation
 2750 **  
 2751 **  The ATU allows external PCI bus initiators to directly access the internal bus. 
 2752 **  These PCI bus initiators can read or write 80331 memory-mapped registers or 80331 local memory space. 
 2753 **  The process of inbound address translation involves two steps:
 2754 **  1. Address Detection.
 2755 **             ˇE Determine when the 32-bit PCI address (64-bit PCI address during DACs) is
 2756 **                within the address windows defined for the inbound ATU.
 2757 **             ˇE Claim the PCI transaction with medium DEVSEL# timing in the conventional PCI
 2758 **                mode and with Decode A DEVSEL# timing in the PCI-X mode.
 2759 **  2. Address Translation.
 2760 **             ˇE Translate the 32-bit PCI address (lower 32-bit PCI address during DACs) to a 32-bit 80331 internal bus address.
 2761 **                              The ATU uses the following registers in inbound address window 0 translation:
 2762 **                              ˇE Inbound ATU Base Address Register 0
 2763 **                              ˇE Inbound ATU Limit Register 0
 2764 **                              ˇE Inbound ATU Translate Value Register 0
 2765 **                              The ATU uses the following registers in inbound address window 2 translation:
 2766 **                              ˇE Inbound ATU Base Address Register 2
 2767 **                              ˇE Inbound ATU Limit Register 2
 2768 **                              ˇE Inbound ATU Translate Value Register 2
 2769 **                              The ATU uses the following registers in inbound address window 3 translation:
 2770 **                              ˇE Inbound ATU Base Address Register 3
 2771 **                              ˇE Inbound ATU Limit Register 3
 2772 **                              ˇE Inbound ATU Translate Value Register 3
 2773 **    Note: Inbound Address window 1 is not a translate window. 
 2774 **          Instead, window 1 may be used to allocate host memory for Private Devices.
 2775 **          Inbound Address window 3 does not reside in the standard section of the configuration header (offsets 00H - 3CH), 
 2776 **          thus the host BIOS does not configure window 3.
 2777 **          Window 3 is intended to be used as a special window into local memory for private PCI
 2778 **          agents controlled by the 80331 in conjunction with the Private Memory Space of the bridge.
 2779 **          PCI-to-PCI Bridge in 80331 or
 2780 **          Inbound address detection is determined from the 32-bit PCI address, 
 2781 **          (64-bit PCI address during DACs) the base address register and the limit register. 
 2782 **          In the case of DACs none of the upper 32-bits of the address is masked during address comparison. 
 2783 **  
 2784 **  The algorithm for detection is:
 2785 **  
 2786 **  Equation 1. Inbound Address Detection
 2787 **              When (PCI_Address [31:0] & Limit_Register[31:0]) == (Base_Register[31:0] & PCI_Address [63:32]) == Base_Register[63:32] (for DACs only) 
 2788 **              the PCI Address is claimed by the Inbound ATU.
 2789 **  
 2790 **                      The incoming 32-bit PCI address (lower 32-bits of the address in case of DACs) is bitwise ANDed
 2791 **                      with the associated inbound limit register. 
 2792 **              When the result matches the base register (and upper base address matches upper PCI address in case of DACs), 
 2793 **              the inbound PCI address is detected as being within the inbound translation window and is claimed by the ATU.
 2794 **
 2795 **                      Note:   The first 4 Kbytes of the ATU inbound address translation window 0 are reserved for the Messaging Unit. 
 2796 **                                      Once the transaction is claimed, the address must be translated from a PCI address to a 32-bit
 2797 **                                      internal bus address. In case of DACs upper 32-bits of the address is simply discarded and only the
 2798 **                                      lower 32-bits are used during address translation. 
 2799 **                              The algorithm is:
 2800 **  
 2801 **  
 2802 **  Equation 2. Inbound Translation
 2803 **              Intel I/O processor Internal Bus Address=(PCI_Address[31:0] & ~Limit_Register[31:0]) | ATU_Translate_Value_Register[31:0].
 2804 **  
 2805 **                      The incoming 32-bit PCI address (lower 32-bits in case of DACs) is first bitwise ANDed with the
 2806 **                      bitwise inverse of the limit register. This result is bitwise ORed with the ATU Translate Value and
 2807 **                      the result is the internal bus address. This translation mechanism is used for all inbound memory
 2808 **                      read and write commands excluding inbound configuration read and writes. 
 2809 **                      In the PCI mode for inbound memory transactions, the only burst order supported is Linear
 2810 **                      Incrementing. For any other burst order, the ATU signals a Disconnect after the first data phase.
 2811 **                      The PCI-X supports linear incrementing only, and hence above situation is not encountered in the PCI-X mode.
 2812 **  example:
 2813 **          Register Values
 2814 **                       Base_Register=3A00 0000H
 2815 **                      Limit_Register=FF80 0000H (8 Mbyte limit value)
 2816 **                      Value_Register=B100 0000H
 2817 **                      Inbound Translation Window ranges from 3A00 0000H to 3A7F FFFFH (8 Mbytes)
 2818 **              
 2819 **              Address Detection (32-bit address)
 2820 **
 2821 **                                              PCI_Address & Limit_Register == Base_Register
 2822 **                                              3A45 012CH  &   FF80 0000H   ==  3A00 0000H
 2823 **
 2824 **                                      ANS: PCI_Address is in the Inbound Translation Window
 2825 **              Address Translation (to get internal bus address)
 2826 **
 2827 **                                              IB_Address=(PCI_Address & ~Limit_Register) | Value_Reg
 2828 **                                              IB_Address=(3A45 012CH & 007F FFFFH) | B100 0000H
 2829 **
 2830 **                                      ANS:IB_Address=B145 012CH
 2831 ***********************************************************************************
 2832 */
 2833 
 2834 
 2835 
 2836 /*
 2837 ***********************************************************************************
 2838 **  Inbound ATU Limit Register 0 - IALR0
 2839 **
 2840 **  Inbound address translation for memory window 0 occurs for data transfers occurring from the PCI
 2841 **  bus (originated from the PCI bus) to the 80331 internal bus. The address translation block converts
 2842 **  PCI addresses to internal bus addresses.
 2843 **  The 80331 translate value registerˇ¦s programmed value must be naturally aligned with the base
 2844 **  address registerˇ¦s programmed value. The limit register is used as a mask; thus, the lower address
 2845 **  bits programmed into the 80331 translate value register are invalid. Refer to the PCI Local Bus
 2846 **  Specification, Revision 2.3 for additional information on programming base address registers.
 2847 **  Bits 31 to 12 within the IALR0 have a direct effect on the IABAR0 register, bits 31 to 12, with a
 2848 **  one to one correspondence. A value of 0 in a bit within the IALR0 makes the corresponding bit
 2849 **  within the IABAR0 a read only bit which always returns 0. A value of 1 in a bit within the IALR0
 2850 **  makes the corresponding bit within the IABAR0 read/write from PCI. Note that a consequence of
 2851 **  this programming scheme is that unless a valid value exists within the IALR0, all writes to the
 2852 **  IABAR0 has no effect since a value of all zeros within the IALR0 makes the IABAR0 a read only  register.
 2853 **  -----------------------------------------------------------------
 2854 **  Bit       Default                       Description
 2855 **  31:12     FF000H                        Inbound Translation Limit 0 - This readback value determines the memory block size required for
 2856 **                                          inbound memory window 0 of the address translation unit. This defaults to an inbound window of 16MB.
 2857 **  11:00       000H                        Reserved
 2858 ***********************************************************************************
 2859 */
 2860 #define     ARCMSR_INBOUND_ATU_LIMIT0_REG                    0x40    /*dword 0x43,0x42,0x41,0x40*/
 2861 /*
 2862 ***********************************************************************************
 2863 **  Inbound ATU Translate Value Register 0 - IATVR0
 2864 **
 2865 **  The Inbound ATU Translate Value Register 0 (IATVR0) contains the internal bus address used to
 2866 **  convert PCI bus addresses. The converted address is driven on the internal bus as a result of the
 2867 **  inbound ATU address translation.
 2868 **  -----------------------------------------------------------------
 2869 **  Bit       Default                       Description
 2870 **  31:12     FF000H                        Inbound ATU Translation Value 0 - This value is used to convert the PCI address to internal bus addresses. 
 2871 **                                          This value must be 64-bit aligned on the internal bus. 
 2872 **                                              The default address allows the ATU to access the internal 80331 memory-mapped registers.
 2873 **  11:00       000H                        Reserved
 2874 ***********************************************************************************
 2875 */
 2876 #define     ARCMSR_INBOUND_ATU_TRANSLATE_VALUE0_REG                  0x44    /*dword 0x47,0x46,0x45,0x44*/
 2877 /*
 2878 ***********************************************************************************
 2879 **  Expansion ROM Limit Register - ERLR
 2880 **
 2881 **  The Expansion ROM Limit Register (ERLR) defines the block size of addresses the ATU defines
 2882 **  as Expansion ROM address space. The block size is programmed by writing a value into the ERLR.
 2883 **  Bits 31 to 12 within the ERLR have a direct effect on the ERBAR register, bits 31 to 12, with a one
 2884 **  to one correspondence. A value of 0 in a bit within the ERLR makes the corresponding bit within
 2885 **  the ERBAR a read only bit which always returns 0. A value of 1 in a bit within the ERLR makes
 2886 **  the corresponding bit within the ERBAR read/write from PCI.
 2887 **  -----------------------------------------------------------------
 2888 **  Bit       Default                       Description
 2889 **  31:12     000000H                       Expansion ROM Limit - Block size of memory required for the Expansion ROM translation unit. Default
 2890 **                         value is 0, which indicates no Expansion ROM address space and all bits within the ERBAR are read only with a value of 0.
 2891 **  11:00        000H                       Reserved.
 2892 ***********************************************************************************
 2893 */
 2894 #define     ARCMSR_EXPANSION_ROM_LIMIT_REG                        0x48    /*dword 0x4B,0x4A,0x49,0x48*/
 2895 /*
 2896 ***********************************************************************************
 2897 **  Expansion ROM Translate Value Register - ERTVR
 2898 **
 2899 **  The Expansion ROM Translate Value Register contains the 80331 internal bus address which the
 2900 **  ATU converts the PCI bus access. This address is driven on the internal bus as a result of the
 2901 **  Expansion ROM address translation.
 2902 **  -----------------------------------------------------------------
 2903 **  Bit       Default                       Description
 2904 **  31:12     00000H                        Expansion ROM Translation Value - Used to convert PCI addresses to 80331 internal bus addresses
 2905 **                          for Expansion ROM accesses. The Expansion ROM address translation value must be word aligned on the internal bus.
 2906 **  11:00       000H                        Reserved
 2907 ***********************************************************************************
 2908 */
 2909 #define     ARCMSR_EXPANSION_ROM_TRANSLATE_VALUE_REG                      0x4C    /*dword 0x4F,0x4E,0x4D,0x4C*/
 2910 /*
 2911 ***********************************************************************************
 2912 **  Inbound ATU Limit Register 1 - IALR1
 2913 **
 2914 **  Bits 31 to 12 within the IALR1 have a direct effect on the IABAR1 register, bits 31 to 12, with a
 2915 **  one to one correspondence. A value of 0 in a bit within the IALR1 makes the corresponding bit
 2916 **  within the IABAR1 a read only bit which always returns 0. A value of 1 in a bit within the IALR1
 2917 **  makes the corresponding bit within the IABAR1 read/write from PCI. Note that a consequence of
 2918 **  this programming scheme is that unless a valid value exists within the IALR1, all writes to the
 2919 **  IABAR1 has no effect since a value of all zeros within the IALR1 makes the IABAR1 a read only
 2920 **  register.
 2921 **  The inbound memory window 1 is used merely to allocate memory on the PCI bus. The ATU does
 2922 **  not process any PCI bus transactions to this memory range.
 2923 **  Warning: The ATU does not claim any PCI accesses that fall within the range defined by IABAR1,
 2924 **  IAUBAR1, and IALR1.
 2925 **  -----------------------------------------------------------------
 2926 **  Bit       Default                       Description
 2927 **  31:12     00000H                        Inbound Translation Limit 1 - This readback value determines the memory block size 
 2928 **                                              required for the ATUs memory window 1.
 2929 **  11:00 000H Reserved
 2930 ***********************************************************************************
 2931 */
 2932 #define     ARCMSR_INBOUND_ATU_LIMIT1_REG                         0x50    /*dword 0x53,0x52,0x51,0x50*/
 2933 /*
 2934 ***********************************************************************************
 2935 **  Inbound ATU Limit Register 2 - IALR2
 2936 **  
 2937 **  Inbound address translation for memory window 2 occurs for data transfers occurring from the PCI
 2938 **  bus (originated from the PCI bus) to the 80331 internal bus. The address translation block converts
 2939 **  PCI addresses to internal bus addresses.
 2940 **  The inbound translation base address for inbound window 2 is specified in Section 3.10.15. When
 2941 **  determining block size requirements ˇX as described in Section 3.10.21 ˇX the translation limit
 2942 **  register provides the block size requirements for the base address register. The remaining registers
 2943 **  used for performing address translation are discussed in Section 3.2.1.1.
 2944 **  The 80331 translate value registerˇ¦s programmed value must be naturally aligned with the base
 2945 **  address registerˇ¦s programmed value. The limit register is used as a mask; thus, the lower address
 2946 **  bits programmed into the 80331 translate value register are invalid. Refer to the PCI Local Bus
 2947 **  Specification, Revision 2.3 for additional information on programming base address registers.
 2948 **  Bits 31 to 12 within the IALR2 have a direct effect on the IABAR2 register, bits 31 to 12, with a
 2949 **  one to one correspondence. A value of 0 in a bit within the IALR2 makes the corresponding bit
 2950 **  within the IABAR2 a read only bit which always returns 0. A value of 1 in a bit within the IALR2
 2951 **  makes the corresponding bit within the IABAR2 read/write from PCI. Note that a consequence of
 2952 **  this programming scheme is that unless a valid value exists within the IALR2, all writes to the
 2953 **  IABAR2 has no effect since a value of all zeros within the IALR2 makes the IABAR2 a read only
 2954 **  register.
 2955 **  -----------------------------------------------------------------
 2956 **  Bit       Default                       Description
 2957 **  31:12     00000H                        Inbound Translation Limit 2 - This readback value determines the memory block size 
 2958 **                                              required for the ATUs memory window 2.
 2959 **  11:00       000H                        Reserved
 2960 ***********************************************************************************
 2961 */
 2962 #define     ARCMSR_INBOUND_ATU_LIMIT2_REG                         0x54    /*dword 0x57,0x56,0x55,0x54*/
 2963 /*
 2964 ***********************************************************************************
 2965 **  Inbound ATU Translate Value Register 2 - IATVR2
 2966 **
 2967 **  The Inbound ATU Translate Value Register 2 (IATVR2) contains the internal bus address used to
 2968 **  convert PCI bus addresses. The converted address is driven on the internal bus as a result of the
 2969 **  inbound ATU address translation.
 2970 **  -----------------------------------------------------------------
 2971 **  Bit       Default                       Description
 2972 **  31:12     00000H                        Inbound ATU Translation Value 2 - This value is used to convert the PCI address to internal bus addresses. 
 2973 **                                                                            This value must be 64-bit aligned on the internal bus. 
 2974 **                                                                              The default address allows the ATU to access the internal 80331 **      **                                                                              memory-mapped registers.
 2975 **  11:00       000H                        Reserved
 2976 ***********************************************************************************
 2977 */
 2978 #define     ARCMSR_INBOUND_ATU_TRANSLATE_VALUE2_REG                       0x58    /*dword 0x5B,0x5A,0x59,0x58*/
 2979 /*
 2980 ***********************************************************************************
 2981 **  Outbound I/O Window Translate Value Register - OIOWTVR
 2982 **
 2983 **  The Outbound I/O Window Translate Value Register (OIOWTVR) contains the PCI I/O address
 2984 **  used to convert the internal bus access to a PCI address. This address is driven on the PCI bus as a
 2985 **  result of the outbound ATU address translation. 
 2986 **  The I/O window is from 80331 internal bus address 9000 000H to 9000 FFFFH with the fixed
 2987 **  length of 64 Kbytes.
 2988 **  -----------------------------------------------------------------
 2989 **  Bit       Default                       Description
 2990 **  31:16     0000H                         Outbound I/O Window Translate Value - Used to convert internal bus addresses to PCI addresses.
 2991 **  15:00     0000H                         Reserved
 2992 ***********************************************************************************
 2993 */
 2994 #define     ARCMSR_OUTBOUND_IO_WINDOW_TRANSLATE_VALUE_REG                         0x5C    /*dword 0x5F,0x5E,0x5D,0x5C*/
 2995 /*
 2996 ***********************************************************************************
 2997 **  Outbound Memory Window Translate Value Register 0 -OMWTVR0
 2998 **
 2999 **  The Outbound Memory Window Translate Value Register 0 (OMWTVR0) contains the PCI
 3000 **  address used to convert 80331 internal bus addresses for outbound transactions. This address is
 3001 **  driven on the PCI bus as a result of the outbound ATU address translation. 
 3002 **  The memory window is from internal bus address 8000 000H to 83FF FFFFH with the fixed length
 3003 **  of 64 Mbytes.
 3004 **  -----------------------------------------------------------------
 3005 **  Bit       Default                       Description
 3006 **  31:26       00H                         Outbound MW Translate Value - Used to convert 80331 internal bus addresses to PCI addresses.
 3007 **  25:02     00 0000H                      Reserved
 3008 **  01:00      00 2                         Burst Order - This bit field shows the address sequence during a memory burst. 
 3009 **                                                              Only linear incrementing mode is supported.
 3010 ***********************************************************************************
 3011 */
 3012 #define     ARCMSR_OUTBOUND_MEMORY_WINDOW_TRANSLATE_VALUE0_REG                    0x60    /*dword 0x63,0x62,0x61,0x60*/
 3013 /*
 3014 ***********************************************************************************
 3015 **  Outbound Upper 32-bit Memory Window Translate Value Register 0 - OUMWTVR0
 3016 **
 3017 **  The Outbound Upper 32-bit Memory Window Translate Value Register 0 (OUMWTVR0) defines
 3018 **  the upper 32-bits of address used during a dual address cycle. This enables the outbound ATU to
 3019 **  directly address anywhere within the 64-bit host address space. When this register is all-zero, then
 3020 **  a SAC is generated on the PCI bus.
 3021 **  The memory window is from internal bus address 8000 000H to 83FF FFFFH with the fixed
 3022 **  length of 64 Mbytes.
 3023 **  -----------------------------------------------------------------
 3024 **  Bit       Default                       Description
 3025 **  31:00     0000 0000H                    These bits define the upper 32-bits of address driven during the dual address cycle (DAC).
 3026 ***********************************************************************************
 3027 */
 3028 #define     ARCMSR_OUTBOUND_UPPER32_MEMORY_WINDOW_TRANSLATE_VALUE0_REG                    0x64    /*dword 0x67,0x66,0x65,0x64*/
 3029 /*
 3030 ***********************************************************************************
 3031 **  Outbound Memory Window Translate Value Register 1 -OMWTVR1
 3032 **
 3033 **  The Outbound Memory Window Translate Value Register 1 (OMWTVR1) contains the PCI
 3034 **  address used to convert 80331 internal bus addresses for outbound transactions. This address is
 3035 **  driven on the PCI bus as a result of the outbound ATU address translation. 
 3036 **  The memory window is from internal bus address 8400 000H to 87FF FFFFH with the fixed length
 3037 **  of 64 Mbytes.
 3038 **  -----------------------------------------------------------------
 3039 **  Bit       Default                       Description
 3040 **  31:26       00H                         Outbound MW Translate Value - Used to convert 80331 internal bus addresses to PCI addresses.
 3041 **  25:02     00 0000H                      Reserved
 3042 **  01:00       00 2                        Burst Order - This bit field shows the address sequence during a memory burst. 
 3043 **                                              Only linear incrementing mode is supported.
 3044 ***********************************************************************************
 3045 */
 3046 #define     ARCMSR_OUTBOUND_MEMORY_WINDOW_TRANSLATE_VALUE1_REG                    0x68    /*dword 0x6B,0x6A,0x69,0x68*/
 3047 /*
 3048 ***********************************************************************************
 3049 **  Outbound Upper 32-bit Memory Window Translate Value Register 1 - OUMWTVR1
 3050 **
 3051 **  The Outbound Upper 32-bit Memory Window Translate Value Register 1 (OUMWTVR1) defines
 3052 **  the upper 32-bits of address used during a dual address cycle. This enables the outbound ATU to
 3053 **  directly address anywhere within the 64-bit host address space. When this register is all-zero, then
 3054 **  a SAC is generated on the PCI bus.
 3055 **  The memory window is from internal bus address 8400 000H to 87FF FFFFH with the fixed length
 3056 **  of 64 Mbytes.
 3057 **  -----------------------------------------------------------------
 3058 **  Bit       Default                       Description
 3059 **  31:00    0000 0000H                     These bits define the upper 32-bits of address driven during the dual address cycle (DAC).
 3060 ***********************************************************************************
 3061 */
 3062 #define     ARCMSR_OUTBOUND_UPPER32_MEMORY_WINDOW_TRANSLATE_VALUE1_REG                    0x6C    /*dword 0x6F,0x6E,0x6D,0x6C*/
 3063 /*
 3064 ***********************************************************************************
 3065 **  Outbound Upper 32-bit Direct Window Translate Value Register - OUDWTVR
 3066 **
 3067 **  The Outbound Upper 32-bit Direct Window Translate Value Register (OUDWTVR) defines the
 3068 **  upper 32-bits of address used during a dual address cycle for the transactions via Direct Addressing
 3069 **  Window. This enables the outbound ATU to directly address anywhere within the 64-bit host
 3070 **  address space. When this register is all-zero, then a SAC is generated on the PCI bus.
 3071 **  -----------------------------------------------------------------
 3072 **  Bit       Default                       Description
 3073 **  31:00    0000 0000H                     These bits define the upper 32-bits of address driven during the dual address cycle (DAC).
 3074 ***********************************************************************************
 3075 */
 3076 #define     ARCMSR_OUTBOUND_UPPER32_DIRECT_WINDOW_TRANSLATE_VALUE_REG                     0x78    /*dword 0x7B,0x7A,0x79,0x78*/
 3077 /*
 3078 ***********************************************************************************
 3079 **  ATU Configuration Register - ATUCR
 3080 **
 3081 **  The ATU Configuration Register controls the outbound address translation for address translation
 3082 **  unit. It also contains bits for Conventional PCI Delayed Read Command (DRC) aliasing, discard
 3083 **  timer status, SERR# manual assertion, SERR# detection interrupt masking, and ATU BIST
 3084 **  interrupt enabling.
 3085 **  -----------------------------------------------------------------
 3086 **  Bit       Default                       Description
 3087 **  31:20       00H                         Reserved
 3088 **  19          0 2                         ATU DRC Alias - when set, the ATU does not distinguish read commands when attempting to match a
 3089 **                      current PCI read transaction with read data enqueued within the DRC buffer. When clear, a current read
 3090 **                      transaction must have the exact same read command as the DRR for the ATU to deliver DRC data. Not
 3091 **                      applicable in the PCI-X mode.
 3092 **  18          0 2                         Direct Addressing Upper 2Gbytes Translation Enable - When set, 
 3093 **                                              with Direct Addressing enabled (bit 7 of the ATUCR set), 
 3094 **                                                      the ATU forwards internal bus cycles with an address between 0000.0040H and
 3095 **                                                              7FFF.FFFFH to the PCI bus with bit 31 of the address set (8000.0000H - FFFF.FFFFH).
 3096 **                                                                       When clear, no translation occurs.
 3097 **  17          0 2                         Reserved
 3098 **  16          0 2                         SERR# Manual Assertion - when set, the ATU asserts SERR# for one clock on the PCI interface. Until
 3099 **                                              cleared, SERR# may not be manually asserted again. Once cleared, operation proceeds as specified.
 3100 **  15          0 2                         ATU Discard Timer Status - when set, one of the 4 discard timers within the ATU has expired and
 3101 **                                              discarded the delayed completion transaction within the queue. When clear, no timer has expired.
 3102 **  14:10    00000 2                        Reserved
 3103 **  09          0 2                         SERR# Detected Interrupt Enable - When set, the Intel XScale core is signalled an HPI# interrupt
 3104 **                                              when the ATU detects that SERR# was asserted. When clear, 
 3105 **                                                      the Intel XScale core is not interrupted when SERR# is detected.
 3106 **  08          0 2                         Direct Addressing Enable - Setting this bit enables direct outbound addressing through the ATU.
 3107 **                                              Internal bus cycles with an address between 0000.0040H and 7FFF.FFFFH automatically forwards to
 3108 **                                              the PCI bus with or without translation of address bit 31 based on the setting of bit 18 of 
 3109 **                                                      the ATUCR.
 3110 **  07:04    0000 2                         Reserved
 3111 **  03          0 2                         ATU BIST Interrupt Enable - When set, enables an interrupt to the Intel XScale core when the start
 3112 **                                              BIST bit is set in the ATUBISTR register. This bit is also reflected as the BIST Capable bit 7 
 3113 **                                                      in the ATUBISTR register.
 3114 **  02          0 2                         Reserved
 3115 **  01          0 2                         Outbound ATU Enable - When set, enables the outbound address translation unit.
 3116 **                                              When cleared, disables the outbound ATU.
 3117 **  00          0 2                         Reserved
 3118 ***********************************************************************************
 3119 */
 3120 #define     ARCMSR_ATU_CONFIGURATION_REG                          0x80    /*dword 0x83,0x82,0x81,0x80*/
 3121 /*
 3122 ***********************************************************************************
 3123 **  PCI Configuration and Status Register - PCSR
 3124 **  
 3125 **  The PCI Configuration and Status Register has additional bits for controlling and monitoring
 3126 **  various features of the PCI bus interface.
 3127 **  -----------------------------------------------------------------
 3128 **  Bit       Default                       Description
 3129 **  31:19      0000H                        Reserved
 3130 **  18          0 2                         Detected Address or Attribute Parity Error - set when a parity error is detected during either the address
 3131 **                                      or attribute phase of a transaction on the PCI bus even when the ATUCMD register Parity Error
 3132 **                                      Response bit is cleared. Set under the following conditions:
 3133 **                                      ˇE Any Address or Attribute (PCI-X Only) Parity Error on the Bus (including one generated by the ATU).
 3134 **  17:16  Varies with
 3135 **                                                                              external state
 3136 **                                                                              of DEVSEL#,
 3137 **                                                                              STOP#, and
 3138 **                                                                              TRDY#,
 3139 **                                                                              during
 3140 **                                                                              P_RST#
 3141 **                                                                              PCI-X capability - These two bits define the mode of 
 3142 **                                                                              the PCI bus (conventional or PCI-X) as well as the
 3143 **                                                                              operating frequency in the case of PCI-X mode.
 3144 **                                                                              00 - Conventional PCI mode
 3145 **                                                                              01 - PCI-X 66
 3146 **                                                                              10 - PCI-X 100
 3147 **                                                                              11 - PCI-X 133
 3148 **                                                                              As defined by the PCI-X Addendum to the PCI Local Bus Specification,
 3149 **                                                                              Revision 1.0a, the operating
 3150 **                                                                              mode is determined by an initialization pattern on the PCI bus during
 3151 **                                                                              P_RST# assertion:
 3152 **                                                                              DEVSEL# STOP# TRDY# Mode
 3153 **                                                                              Deasserted Deasserted Deasserted Conventional
 3154 **                                                                              Deasserted Deasserted Asserted PCI-X 66
 3155 **                                                                              Deasserted Asserted Deasserted PCI-X 100
 3156 **                                                                              Deasserted Asserted Asserted PCI-X 133
 3157 **                                                                              All other patterns are reserved.
 3158 **  15          0 2
 3159 **                                                                              Outbound Transaction Queue Busy:
 3160 **                                                                                  0=Outbound Transaction Queue Empty
 3161 **                                                                                  1=Outbound Transaction Queue Busy
 3162 **  14          0 2
 3163 **                                                                              Inbound Transaction Queue Busy:
 3164 **                                                                                  0=Inbound Transaction Queue Empty
 3165 **                                                                                  1=Inbound Transaction Queue Busy
 3166 **  13          0 2                         Reserved.
 3167 **  12          0 2                                                             Discard Timer Value - This bit controls the time-out value 
 3168 **                                                                              for the four discard timers attached to the queues holding read data. 
 3169 **                                                         A value of 0 indicates the time-out value is 2 15 clocks. 
 3170 **                                                         A value of 1 indicates the time-out value is 2 10 clocks.
 3171 **  11          0 2                         Reserved.
 3172 **  10      Varies with
 3173 **                                                                              external state
 3174 **                                                                              of M66EN
 3175 **                                                                              during
 3176 **                                                                              P_RST#
 3177 **                                                      Bus Operating at 66 MHz - When set, the interface has been initialized to function at 66 MHz in
 3178 **                                                                              Conventional PCI mode by the assertion of M66EN during bus initialization.
 3179 **                                                                              When clear, the interface
 3180 **                                                                              has been initialized as a 33 MHz bus.
 3181 **              NOTE: When PCSR bits 17:16 are not equal to zero, then this bit is meaningless since the 80331 is operating in PCI-X mode.
 3182 **  09          0 2                         Reserved
 3183 **  08      Varies with
 3184 **                                                                              external state
 3185 **                                                                              of REQ64#
 3186 **                                                                              during
 3187 **                                                                              P_RST#
 3188 **                                                                              PCI Bus 64-Bit Capable - When clear, the PCI bus interface has been
 3189 **                                                                              configured as 64-bit capable by
 3190 **                                                                              the assertion of REQ64# on the rising edge of P_RST#. When set, 
 3191 **                                                                              the PCI interface is configured as
 3192 **                                                                              32-bit only.
 3193 **  07:06      00 2                         Reserved.
 3194 **  05         0 2                                              Reset Internal Bus - This bit controls the reset of the Intel XScale core 
 3195 **                                                              and all units on the internal
 3196 **                                                              bus. In addition to the internal bus initialization, 
 3197 **                                                              this bit triggers the assertion of the M_RST# pin for
 3198 **                                                              initialization of registered DIMMs. When set:
 3199 **                                                              When operating in the conventional PCI mode:
 3200 **                                                              ˇE All current PCI transactions being mastered by the ATU completes, 
 3201 **                                                              and the ATU master interfaces
 3202 **                                                              proceeds to an idle state. No additional transactions is mastered by these units
 3203 **                                                              until the internal bus reset is complete.
 3204 **                                                              ˇE All current transactions being slaved by the ATU on either the PCI bus 
 3205 **                                                              or the internal bus
 3206 **                                                              completes, and the ATU target interfaces proceeds to an idle state. 
 3207 **                                                              All future slave transactions master aborts, 
 3208 **                                                              with the exception of the completion cycle for the transaction that set the Reset
 3209 **                                                              Internal Bus bit in the PCSR.
 3210 **                                                              ˇE When the value of the Core Processor Reset bit in the PCSR (upon P_RST# assertion) 
 3211 **                                                              is set, the Intel XScale core is held in reset when the internal bus reset is complete.
 3212 **                                                              ˇE The ATU ignores configuration cycles, and they appears as master aborts for: 32 
 3213 **                                                              Internal Bus clocks.
 3214 **                                                              ˇE The 80331 hardware clears this bit after the reset operation completes.
 3215 **                                                              When operating in the PCI-X mode:
 3216 **                                                              The ATU hardware responds the same as in Conventional PCI-X mode. 
 3217 **                                                              However, this may create a problem in PCI-X mode for split requests in 
 3218 **                                                              that there may still be an outstanding split completion that the
 3219 **                                                              ATU is either waiting to receive (Outbound Request) or initiate 
 3220 **                                                              (Inbound Read Request). For a cleaner
 3221 **                                                              internal bus reset, host software can take the following steps prior 
 3222 **                                                              to asserting Reset Internal bus:
 3223 **                                      1. Clear the Bus Master (bit 2 of the ATUCMD) and the Memory Enable (bit 1 of the ATUCMD) bits in
 3224 **                                              the ATUCMD. This ensures that no new transactions, either outbound or inbound are enqueued.
 3225 **                                      2. Wait for both the Outbound (bit 15 of the PCSR) and Inbound Read (bit 14 of the PCSR) Transaction
 3226 **                                              queue busy bits to be clear.
 3227 **                                      3. Set the Reset Internal Bus bit
 3228 **      As a result, the ATU hardware resets the internal bus using the same logic as in conventional mode,
 3229 **      however the user is now assured that the ATU no longer has any pending inbound or outbound split
 3230 **      completion transactions.
 3231 **      NOTE: Since the Reset Internal Bus bit is set using an inbound configuration cycle, the user is
 3232 **      guaranteed that any prior configuration cycles have properly completed since there is only a one
 3233 **      deep transaction queue for configuration transaction requests. The ATU sends the appropriate
 3234 **      Split Write Completion Message to the Requester prior to the onset of Internal Bus Reset.
 3235 **  04      0 2                                                 Bus Master Indicator Enable: Provides software control for the
 3236 **                                                              Bus Master Indicator signal P_BMI used
 3237 **              for external RAIDIOS logic control of private devices. Only valid when operating with the bridge and
 3238 **              central resource/arbiter disabled (BRG_EN =low, ARB_EN=low).
 3239 **  03          Varies with external state of PRIVDEV during
 3240 **                                                      P_RST#
 3241 **                      Private Device Enable - This bit indicates the state of the reset strap which enables the private device
 3242 **                      control mechanism within the PCI-to-PCI Bridge SISR configuration register.
 3243 **                      0=Private Device control Disabled - SISR register bits default to zero
 3244 **                      1=Private Device control Enabled - SISR register bits default to one
 3245 **      02      Varies with external state of RETRY during P_RST#
 3246 **                      Configuration Cycle Retry - When this bit is set, the PCI interface of the 80331 responds to all
 3247 **                      configuration cycles with a Retry condition. When clear, the 80331 responds to the appropriate
 3248 **                      configuration cycles.
 3249 **              The default condition for this bit is based on the external state of the RETRY pin at the rising edge of
 3250 **                      P_RST#. When the external state of the pin is high, the bit is set. When the external state of the pin is
 3251 **                      low, the bit is cleared.
 3252 **  01          Varies with external state of CORE_RST# during P_RST#
 3253 **                      Core Processor Reset - This bit is set to its default value by the hardware when either P_RST# is
 3254 **                      asserted or the Reset Internal Bus bit in PCSR is set. When this bit is set, the Intel XScale core is
 3255 **                      being held in reset. Software cannot set this bit. Software is required to clear this bit to deassert Intel 
 3256 **                      XScale  core reset.
 3257 **                      The default condition for this bit is based on the external state of the CORE_RST# pin at the rising edge
 3258 **                      of P_RST#. When the external state of the pin is low, the bit is set. When the external state of the pin is
 3259 **                      high, the bit is clear.
 3260 **  00          Varies with external state of PRIVMEM during P_RST#
 3261 **                      Private Memory Enable - This bit indicates the state of the reset strap which enables the private device
 3262 **                      control mechanism within the PCI-to-PCI Bridge SDER configuration register.
 3263 **                      0=Private Memory control Disabled - SDER register bit 2 default to zero
 3264 **                      1=Private Memory control Enabled - SDER register bits 2 default to one
 3265 ***********************************************************************************
 3266 */
 3267 #define     ARCMSR_PCI_CONFIGURATION_STATUS_REG                   0x84    /*dword 0x87,0x86,0x85,0x84*/
 3268 /*
 3269 ***********************************************************************************
 3270 **  ATU Interrupt Status Register - ATUISR
 3271 **  
 3272 **  The ATU Interrupt Status Register is used to notify the core processor of the source of an ATU
 3273 **  interrupt. In addition, this register is written to clear the source of the interrupt to the interrupt unit
 3274 **  of the 80331. All bits in this register are Read/Clear.
 3275 **  Bits 4:0 are a direct reflection of bits 14:11 and bit 8 (respectively) of the ATU Status Register
 3276 **  (these bits are set at the same time by hardware but need to be cleared independently). Bit 7 is set
 3277 **  by an error associated with the internal bus of the 80331. Bit 8 is for software BIST. The
 3278 **  conditions that result in an ATU interrupt are cleared by writing a 1 to the appropriate bits in this
 3279 **  register.
 3280 **  Note: Bits 4:0, and bits 15 and 13:7 can result in an interrupt being driven to the Intel XScale core.
 3281 **  -----------------------------------------------------------------
 3282 **  Bit       Default                       Description
 3283 **  31:18      0000H                        Reserved
 3284 **  17          0 2                         VPD Address Register Updated - This bit is set when a PCI bus configuration write occurs to the VPDAR
 3285 **                                                                                                              register. Configuration register writes to the VPDAR does NOT result in bit 15 also being set. When set,
 3286 **                                                                                                              this bit results in the assertion of the ATU Configure Register Write Interrupt.
 3287 **  16          0 2                         Reserved
 3288 **  15          0 2                         ATU Configuration Write - This bit is set when a PCI bus configuration write occurs to any ATU register.
 3289 **                                                          When set, this bit results in the assertion of the ATU Configure Register Write Interrupt.
 3290 **  14          0 2                         ATU Inbound Memory Window 1 Base Updated - This bit is set when a PCI bus configuration write
 3291 **                                                                                                              occurs to either the IABAR1 register or the IAUBAR1 register. Configuration register writes to these
 3292 **                                                                                                              registers deos NOT result in bit 15 also being set. When set, this bit results in the assertion of the ATU
 3293 **                                                                                                              Configure Register Write Interrupt.
 3294 **  13          0 2                         Initiated Split Completion Error Message - This bit is set when the device initiates a Split Completion
 3295 **                                                          Message on the PCI Bus with the Split Completion Error attribute bit set.
 3296 **  12          0 2                         Received Split Completion Error Message - This bit is set when the device receives a Split Completion
 3297 **                                                          Message from the PCI Bus with the Split Completion Error attribute bit set.
 3298 **  11          0 2                         Power State Transition - When the Power State Field of the ATU Power Management Control/Status
 3299 **                                                                                                              Register is written to transition the ATU function Power State from D0 to D3, D0 to D1, or D3 to D0 and
 3300 **                                                                                                              the ATU Power State Transition Interrupt mask bit is cleared, this bit is set.
 3301 **  10          0 2                         P_SERR# Asserted - set when P_SERR# is asserted on the PCI bus by the ATU.
 3302 **  09          0 2                         Detected Parity Error - set when a parity error is detected on the PCI bus even when the ATUCMD
 3303 **                                                                                                              registerˇ¦s Parity Error Response bit is cleared. Set under the following conditions:
 3304 **                                                                                                              ˇE Write Data Parity Error when the ATU is a target (inbound write).
 3305 **                                                                                                              ˇE Read Data Parity Error when the ATU is an initiator (outbound read).
 3306 **                                                                                                              ˇE Any Address or Attribute (PCI-X Only) Parity Error on the Bus.
 3307 **  08          0 2                         ATU BIST Interrupt - When set, generates the ATU BIST Start Interrupt and indicates the host processor
 3308 **                                                                                                              has set the Start BIST bit (ATUBISTR register bit 6), when the ATU BIST interrupt is enabled (ATUCR
 3309 **                                                                                                              register bit 3). The Intel XScale core can initiate the software BIST and store the result in ATUBISTR
 3310 **                                                                                                              register bits 3:0.
 3311 **                                                                                                              Configuration register writes to the ATUBISTR does NOT result in bit 15 also being set or the assertion
 3312 **                                                                                                              of the ATU Configure Register Write Interrupt.
 3313 **  07          0 2                         Internal Bus Master Abort - set when a transaction initiated by the ATU internal bus initiator interface ends in a Master-abort.
 3314 **  06:05      00 2                         Reserved.
 3315 **  04          0 2                         P_SERR# Detected - set when P_SERR# is detected on the PCI bus by the ATU.
 3316 **  03          0 2                         PCI Master Abort - set when a transaction initiated by the ATU PCI initiator interface ends in a Master-abort.
 3317 **  02          0 2                         PCI Target Abort (master) - set when a transaction initiated by the ATU PCI master interface ends in a Target-abort.
 3318 **  01          0 2                         PCI Target Abort (target) - set when the ATU interface, acting as a target, terminates the transaction on the PCI bus with a target abort.
 3319 **  00          0 2                         PCI Master Parity Error - Master Parity Error - The ATU interface sets this bit under the following
 3320 **                                                                                                              conditions:
 3321 **                                                                                                              ˇE The ATU asserted PERR# itself or the ATU observed PERR# asserted.
 3322 **                                                                                                              ˇE And the ATU acted as the requester for the operation in which the error occurred.
 3323 **                                                                                                              ˇE And the ATUCMD registerˇ¦s Parity Error Response bit is set
 3324 **                                                                                                              ˇE Or (PCI-X Mode Only) the ATU received a Write Data Parity Error Message
 3325 **                                                                                                              ˇE And the ATUCMD registerˇ¦s Parity Error Response bit is set
 3326 ***********************************************************************************
 3327 */
 3328 #define     ARCMSR_ATU_INTERRUPT_STATUS_REG                       0x88    /*dword 0x8B,0x8A,0x89,0x88*/
 3329 /*
 3330 ***********************************************************************************
 3331 **  ATU Interrupt Mask Register - ATUIMR
 3332 **
 3333 **  The ATU Interrupt Mask Register contains the control bit to enable and disable interrupts
 3334 **  generated by the ATU.
 3335 **  -----------------------------------------------------------------
 3336 **  Bit       Default                       Description
 3337 **  31:15     0 0000H                       Reserved
 3338 **  14        0 2                           VPD Address Register Updated Mask - Controls the setting of bit 17 of the ATUISR and generation of the
 3339 **                                      ATU Configuration Register Write interrupt when a PCI bus write occurs to the VPDAR register.
 3340 **                                      0=Not Masked
 3341 **                                      1=Masked
 3342 **  13        0 2                           Reserved
 3343 **  12        0 2                           Configuration Register Write Mask - Controls the setting of bit 15 of the ATUISR and generation of the
 3344 **                                      ATU Configuration Register Write interrupt when a PCI bus write occurs to any ATU configuration register
 3345 **                                      except those covered by mask bit 11 and bit 14 of this register, and ATU BIST enable bit 3 of the ATUCR.
 3346 **                                                                              0=Not Masked
 3347 **                                                                              1=Masked
 3348 **  11        1 2                           ATU Inbound Memory Window 1 Base Updated Mask - Controls the setting of bit 14 of the ATUISR and
 3349 **                                      generation of the ATU Configuration Register Write interrupt when a PCI bus write occurs to either the
 3350 **                                                                                                              IABAR1 register or the IAUBAR1 register.
 3351 **                                                                                                              0=Not Masked
 3352 **                                                                                                              1=Masked
 3353 **  10        0 2                           Initiated Split Completion Error Message Interrupt Mask - Controls the setting of bit 13 of the ATUISR and
 3354 **                                      generation of the ATU Error interrupt when the ATU initiates a Split Completion Error Message.
 3355 **                                                                                                              0=Not Masked
 3356 **                                                                                                              1=Masked
 3357 **  09        0 2                           Received Split Completion Error Message Interrupt Mask- Controls the setting of bit 12 of the ATUISR
 3358 **                                      and generation of the ATU Error interrupt when a Split Completion Error Message results in bit 29 of the
 3359 **                                      PCIXSR being set.
 3360 **                                      0=Not Masked
 3361 **                                      1=Masked
 3362 **  08        1 2                           Power State Transition Interrupt Mask - Controls the setting of bit 12 of the ATUISR and generation of the
 3363 **                                      ATU Error interrupt when ATU Power Management Control/Status Register is written to transition the
 3364 **                                      ATU Function Power State from D0 to D3, D0 to D1, D1 to D3 or D3 to D0.
 3365 **                                                                                                              0=Not Masked
 3366 **                                                                                                              1=Masked
 3367 **  07        0 2                           ATU Detected Parity Error Interrupt Mask - Controls the setting of bit 9 of the ATUISR and generation of
 3368 **                                      the ATU Error interrupt when a parity error detected on the PCI bus that sets bit 15 of the ATUSR.
 3369 **                                                                                                              0=Not Masked
 3370 **                                                                                                              1=Masked
 3371 **  06        0 2                           ATU SERR# Asserted Interrupt Mask - Controls the setting of bit 10 of the ATUISR and generation of the
 3372 **                                      ATU Error interrupt when SERR# is asserted on the PCI interface resulting in bit 14 of the ATUSR being set.
 3373 **                                                                                                              0=Not Masked
 3374 **                                                                                                              1=Masked
 3375 **              NOTE: This bit is specific to the ATU asserting SERR# and not detecting SERR# from another master.
 3376 **  05        0 2                           ATU PCI Master Abort Interrupt Mask - Controls the setting of bit 3 of the ATUISR and generation of the
 3377 **                                      ATU Error interrupt when a master abort error resulting in bit 13 of the ATUSR being set.
 3378 **                                                                                                              0=Not Masked
 3379 **                                                                                                              1=Masked
 3380 **  04        0 2                           ATU PCI Target Abort (Master) Interrupt Mask- Controls the setting of bit 12 of the ATUISR and ATU Error
 3381 **                                      generation of the interrupt when a target abort error resulting in bit 12 of the ATUSR being set
 3382 **                                                                                                              0=Not Masked
 3383 **                                                                                                              1=Masked
 3384 **  03        0 2                           ATU PCI Target Abort (Target) Interrupt Mask- Controls the setting of bit 1 of the ATUISR and generation
 3385 **                                      of the ATU Error interrupt when a target abort error resulting in bit 11 of the ATUSR being set.
 3386 **                                                                                                              0=Not Masked
 3387 **                                                                                                              1=Masked
 3388 **  02        0 2                           ATU PCI Master Parity Error Interrupt Mask - Controls the setting of bit 0 of the ATUISR and generation
 3389 **                                      of the ATU Error interrupt when a parity error resulting in bit 8 of the ATUSR being set.
 3390 **                                                                                                              0=Not Masked
 3391 **                                                                                                              1=Masked
 3392 **  01        0 2                           ATU Inbound Error SERR# Enable - Controls when the ATU asserts (when enabled through the
 3393 **                                      ATUCMD) SERR# on the PCI interface in response to a master abort on the internal bus during an
 3394 **                                                                                                              inbound write transaction.
 3395 **                                                                                                              0=SERR# Not Asserted due to error
 3396 **                                                                                                              1=SERR# Asserted due to error
 3397 **  00        0 2                           ATU ECC Target Abort Enable - Controls the ATU response on the PCI interface to a target abort (ECC
 3398 **                                      error) from the memory controller on the internal bus. In conventional mode, this action only occurs
 3399 **                                      during an inbound read transaction where the data phase that was target aborted on the internal bus is
 3400 **                                      actually requested from the inbound read queue.
 3401 **                                                                                                              0=Disconnect with data 
 3402 **                                                                                                              (the data being up to 64 bits of 1ˇ¦s)
 3403 **                                                                                                              1=Target Abort
 3404 **              NOTE: In PCI-X Mode, The ATU initiates a Split Completion Error Message (with message class=2h -
 3405 **                      completer error and message index=81h - 80331 internal bus target abort) on the PCI bus,
 3406 **                      independent of the setting of this bit.
 3407 *********************************************************************************** 
 3408 */
 3409 #define     ARCMSR_ATU_INTERRUPT_MASK_REG                         0x8C    /*dword 0x8F,0x8E,0x8D,0x8C*/
 3410 /*
 3411 ***********************************************************************************
 3412 **  Inbound ATU Base Address Register 3 - IABAR3
 3413 **
 3414 **  . The Inbound ATU Base Address Register 3 (IABAR3) together with the Inbound ATU Upper Base Address Register 3 (IAUBAR3) defines the block 
 3415 **    of memory addresses where the inbound translation window 3 begins. 
 3416 **  . The inbound ATU decodes and forwards the bus request to the 80331 internal bus with a translated address to map into 80331 local memory. 
 3417 **  . The IABAR3 and IAUBAR3 define the base address and describes the required memory block size.
 3418 **  . Bits 31 through 12 of the IABAR3 is either read/write bits or read only with a value of 0 depending on the value located within the IALR3. 
 3419 **    The programmed value within the base address register must comply with the PCI programming requirements for address alignment. 
 3420 **  Note: 
 3421 **      Since IABAR3 does not appear in the standard PCI configuration header space (offsets 00H - 3CH), 
 3422 **      IABAR3 is not configured by the host during normal system initialization.
 3423 **  Warning: 
 3424 **    When a non-zero value is not written to IALR3, 
 3425 **                          the user should not set either the Prefetchable Indicator 
 3426 **                                                      or the Type         Indicator for 64 bit addressability.
 3427 **                          This is the default for IABAR3. 
 3428 **  Assuming a non-zero value is written to IALR3,
 3429 **                          the user may set the Prefetchable Indicator 
 3430 **                                        or the Type         Indicator:
 3431 **                                              a. Since non prefetchable memory windows can never be placed above the 4 Gbyte address boundary,
 3432 **                             when the Prefetchable Indicator is not set, 
 3433 **                             the user should also leave the Type Indicator set for 32 bit addressability.
 3434 **                             This is the default for IABAR3.
 3435 **                                              b. when the Prefetchable Indicator is set, 
 3436 **                             the user should also set the Type Indicator for 64 bit addressability.
 3437 **  -----------------------------------------------------------------
 3438 **  Bit       Default                       Description
 3439 **  31:12     00000H                        Translation Base Address 3 - These bits define the actual location 
 3440 **                                          the translation function is to respond to when addressed from the PCI bus.
 3441 **  11:04        00H                        Reserved.
 3442 **  03           0 2                        Prefetchable Indicator - When set, defines the memory space as prefetchable.
 3443 **  02:01       00 2                        Type Indicator - Defines the width of the addressability for this memory window:
 3444 **                                              00 - Memory Window is locatable anywhere in 32 bit address space
 3445 **                                              10 - Memory Window is locatable anywhere in 64 bit address space
 3446 **  00           0 2                        Memory Space Indicator - This bit field describes memory or I/O space base address.
 3447 **                                                                   The ATU does not occupy I/O space, 
 3448 **                                                                   thus this bit must be zero.
 3449 ***********************************************************************************
 3450 */
 3451 #define     ARCMSR_INBOUND_ATU_BASE_ADDRESS3_REG                          0x90    /*dword 0x93,0x92,0x91,0x90*/
 3452 /*
 3453 ***********************************************************************************
 3454 **  Inbound ATU Upper Base Address Register 3 - IAUBAR3
 3455 **
 3456 **  This register contains the upper base address when decoding PCI addresses beyond 4 GBytes.
 3457 **  Together with the Translation Base Address this register defines the actual location
 3458 **  the translation function is to respond to when addressed from the PCI bus for addresses > 4GBytes (for DACs).
 3459 **  The programmed value within the base address register must comply with the PCI programming
 3460 **  requirements for address alignment.
 3461 **  Note: 
 3462 **      When the Type indicator of IABAR3 is set to indicate 32 bit addressability, 
 3463 **      the IAUBAR3 register attributes are read-only. 
 3464 **      This is the default for IABAR3.
 3465 **  -----------------------------------------------------------------
 3466 **  Bit       Default                       Description
 3467 **  31:0      00000H                        Translation Upper Base Address 3 - Together with the Translation Base Address 3 these bits define 
 3468 **                        the actual location the translation function is to respond to when addressed from the PCI bus for addresses > 4GBytes.
 3469 ***********************************************************************************
 3470 */
 3471 #define     ARCMSR_INBOUND_ATU_UPPER_BASE_ADDRESS3_REG                    0x94    /*dword 0x97,0x96,0x95,0x94*/
 3472 /*
 3473 ***********************************************************************************
 3474 **  Inbound ATU Limit Register 3 - IALR3
 3475 **
 3476 **  Inbound address translation for memory window 3 occurs for data transfers occurring from the PCI
 3477 **  bus (originated from the PCI bus) to the 80331 internal bus. The address translation block converts
 3478 **  PCI addresses to internal bus addresses.
 3479 **  The inbound translation base address for inbound window 3 is specified in Section 3.10.15. When
 3480 **  determining block size requirements ˇX as described in Section 3.10.21 ˇX the translation limit
 3481 **  register provides the block size requirements for the base address register. The remaining registers
 3482 **  used for performing address translation are discussed in Section 3.2.1.1.
 3483 **  The 80331 translate value registerˇ¦s programmed value must be naturally aligned with the base
 3484 **  address registerˇ¦s programmed value. The limit register is used as a mask; thus, the lower address
 3485 **  bits programmed into the 80331 translate value register are invalid. Refer to the PCI Local Bus
 3486 **  Specification, Revision 2.3 for additional information on programming base address registers.
 3487 **  Bits 31 to 12 within the IALR3 have a direct effect on the IABAR3 register, bits 31 to 12, with a
 3488 **  one to one correspondence. A value of 0 in a bit within the IALR3 makes the corresponding bit
 3489 **  within the IABAR3 a read only bit which always returns 0. A value of 1 in a bit within the IALR3
 3490 **  makes the corresponding bit within the IABAR3 read/write from PCI. Note that a consequence of
 3491 **  this programming scheme is that unless a valid value exists within the IALR3, all writes to the
 3492 **  IABAR3 has no effect since a value of all zeros within the IALR3 makes the IABAR3 a read only
 3493 **  register.
 3494 **  -----------------------------------------------------------------
 3495 **  Bit       Default                       Description
 3496 **  31:12     00000H                        Inbound Translation Limit 3 - This readback value determines the memory block size required 
 3497 **                                          for the ATUs memory window 3.
 3498 **  11:00       000H                        Reserved
 3499 ***********************************************************************************
 3500 */
 3501 #define     ARCMSR_INBOUND_ATU_LIMIT3_REG                         0x98    /*dword 0x9B,0x9A,0x99,0x98*/
 3502 /*
 3503 ***********************************************************************************
 3504 **  Inbound ATU Translate Value Register 3 - IATVR3
 3505 **
 3506 **  The Inbound ATU Translate Value Register 3 (IATVR3) contains the internal bus address used to
 3507 **  convert PCI bus addresses. The converted address is driven on the internal bus as a result of the
 3508 **  inbound ATU address translation.
 3509 **  -----------------------------------------------------------------
 3510 **  Bit       Default                       Description
 3511 **  31:12     00000H                        Inbound ATU Translation Value 3 - This value is used to convert the PCI address to internal bus addresses. 
 3512 **                                                          This value must be 64-bit aligned on the internal bus. The default address allows the ATU to
 3513 **                                                          access the internal 80331 memory-mapped registers.
 3514 **  11:00       000H                        Reserved
 3515 ***********************************************************************************
 3516 */
 3517 #define     ARCMSR_INBOUND_ATU_TRANSLATE_VALUE3_REG                       0x9C    /*dword 0x9F,0x9E,0x9D,0x9C*/
 3518 /*
 3519 ***********************************************************************************
 3520 **  Outbound Configuration Cycle Address Register - OCCAR
 3521 **  
 3522 **  The Outbound Configuration Cycle Address Register is used to hold the 32-bit PCI configuration
 3523 **  cycle address. The Intel XScale core writes the PCI configuration cycles address which then
 3524 **  enables the outbound configuration read or write. The Intel XScale core then performs a read or
 3525 **  write to the Outbound Configuration Cycle Data Register to initiate the configuration cycle on the
 3526 **  PCI bus.
 3527 **  Note: Bits 15:11 of the configuration cycle address for Type 0 configuration cycles are defined differently
 3528 **  for Conventional versus PCI-X modes. When 80331 software programs the OCCAR to initiate a
 3529 **  Type 0 configuration cycle, the OCCAR should always be loaded based on the PCI-X definition for
 3530 **  the Type 0 configuration cycle address. When operating in Conventional mode, the 80331 clears
 3531 **  bits 15:11 of the OCCAR prior to initiating an outbound Type 0 configuration cycle. See the PCI-X
 3532 **  Addendum to the PCI Local Bus Specification, Revision 1.0a for details on the two formats.
 3533 **  -----------------------------------------------------------------
 3534 **  Bit       Default                       Description
 3535 **  31:00    0000 0000H                     Configuration Cycle Address - These bits define the 32-bit PCI address used during an outbound 
 3536 **                                          configuration read or write cycle.
 3537 ***********************************************************************************
 3538 */
 3539 #define     ARCMSR_OUTBOUND_CONFIGURATION_CYCLE_ADDRESS_REG                       0xA4    /*dword 0xA7,0xA6,0xA5,0xA4*/
 3540 /*
 3541 ***********************************************************************************
 3542 **  Outbound Configuration Cycle Data Register - OCCDR
 3543 **
 3544 **  The Outbound Configuration Cycle Data Register is used to initiate a configuration read or write
 3545 **  on the PCI bus. The register is logical rather than physical meaning that it is an address not a
 3546 **  register. The Intel XScale core reads or writes the data registers memory-mapped address to
 3547 **  initiate the configuration cycle on the PCI bus with the address found in the OCCAR. For a
 3548 **  configuration write, the data is latched from the internal bus and forwarded directly to the OWQ.
 3549 **  For a read, the data is returned directly from the ORQ to the Intel XScale core and is never
 3550 **  actually entered into the data register (which does not physically exist).
 3551 **  The OCCDR is only visible from 80331 internal bus address space and appears as a reserved value
 3552 **  within the ATU configuration space.
 3553 **  -----------------------------------------------------------------
 3554 **  Bit       Default                       Description
 3555 **  31:00    0000 0000H                     Configuration Cycle Data - These bits define the data used during an outbound configuration read 
 3556 **                                          or write cycle.
 3557 ***********************************************************************************
 3558 */
 3559 #define     ARCMSR_OUTBOUND_CONFIGURATION_CYCLE_DATA_REG                          0xAC    /*dword 0xAF,0xAE,0xAD,0xAC*/
 3560 /*
 3561 ***********************************************************************************
 3562 **  VPD Capability Identifier Register - VPD_CAPID
 3563 **  
 3564 **  The Capability Identifier Register bits adhere to the definitions in the PCI Local Bus Specification,
 3565 **  Revision 2.3. This register in the PCI Extended Capability header identifies the type of Extended
 3566 **  Capability contained in that header. In the case of the 80331, this is the VPD extended capability
 3567 **  with an ID of 03H as defined by the PCI Local Bus Specification, Revision 2.3.
 3568 **  -----------------------------------------------------------------
 3569 **  Bit       Default                       Description
 3570 **  07:00       03H               Cap_Id - This field with itsˇ¦ 03H value identifies this item in the linked list of Extended Capability
 3571 **                                Headers as being the VPD capability registers.
 3572 ***********************************************************************************
 3573 */
 3574 #define     ARCMSR_VPD_CAPABILITY_IDENTIFIER_REG                      0xB8    /*byte*/
 3575 /*
 3576 ***********************************************************************************
 3577 **  VPD Next Item Pointer Register - VPD_NXTP
 3578 **  
 3579 **  The Next Item Pointer Register bits adhere to the definitions in the PCI Local Bus Specification,
 3580 **  Revision 2.3. This register describes the location of the next item in the functionˇ¦s capability list.
 3581 **  For the 80331, this the final capability list, and hence, this register is set to 00H.
 3582 **  -----------------------------------------------------------------
 3583 **  Bit       Default                       Description
 3584 **  07:00       00H               Next_ Item_ Pointer - This field provides an offset into the functionˇ¦s configuration space pointing to the
 3585 **                                next item in the functionˇ¦s capability list. Since the VPD capabilities are the last in the linked list of
 3586 **                                extended capabilities in the 80331, the register is set to 00H.
 3587 ***********************************************************************************
 3588 */
 3589 #define     ARCMSR_VPD_NEXT_ITEM_PTR_REG                          0xB9    /*byte*/
 3590 /*
 3591 ***********************************************************************************
 3592 **  VPD Address Register - VPD_AR
 3593 **
 3594 **  The VPD Address register (VPDAR) contains the DWORD-aligned byte address of the VPD to be
 3595 **  accessed. The register is read/write and the initial value at power-up is indeterminate.
 3596 **  A PCI Configuration Write to the VPDAR interrupts the Intel XScale core. Software can use
 3597 **  the Flag setting to determine whether the configuration write was intended to initiate a read or
 3598 **  write of the VPD through the VPD Data Register.
 3599 **  -----------------------------------------------------------------
 3600 **  Bit       Default                       Description
 3601 **  15          0 2          Flag - A flag is used to indicate when a transfer of data between the VPD Data Register and the storage
 3602 **                           component has completed. Please see Section 3.9, ˇ§Vital Product Dataˇ¨ on page 201 for more details on
 3603 **                           how the 80331 handles the data transfer.
 3604 **  14:0       0000H         VPD Address - This register is written to set the DWORD-aligned byte address used to read or write
 3605 **                           Vital Product Data from the VPD storage component.
 3606 ***********************************************************************************
 3607 */
 3608 #define     ARCMSR_VPD_ADDRESS_REG                        0xBA    /*word 0xBB,0xBA*/
 3609 /*
 3610 ***********************************************************************************
 3611 **  VPD Data Register - VPD_DR
 3612 **
 3613 **  This register is used to transfer data between the 80331 and the VPD storage component.
 3614 **  -----------------------------------------------------------------
 3615 **  Bit       Default                       Description
 3616 **  31:00      0000H                        VPD Data - Four bytes are always read or written through this register to/from the VPD storage component.
 3617 ***********************************************************************************
 3618 */
 3619 #define     ARCMSR_VPD_DATA_REG                   0xBC    /*dword 0xBF,0xBE,0xBD,0xBC*/
 3620 /*
 3621 ***********************************************************************************
 3622 **  Power Management Capability Identifier Register -PM_CAPID
 3623 **
 3624 **  The Capability Identifier Register bits adhere to the definitions in the PCI Local Bus Specification,
 3625 **  Revision 2.3. This register in the PCI Extended Capability header identifies the type of Extended
 3626 **  Capability contained in that header. In the case of the 80331, this is the PCI Bus Power
 3627 **  Management extended capability with an ID of 01H as defined by the PCI Bus Power Management
 3628 **  Interface Specification, Revision 1.1.
 3629 **  -----------------------------------------------------------------
 3630 **  Bit       Default                       Description
 3631 **  07:00       01H                         Cap_Id - This field with itsˇ¦ 01H value identifies this item in the linked list of Extended Capability
 3632 **                                          Headers as being the PCI Power Management Registers.
 3633 ***********************************************************************************
 3634 */
 3635 #define     ARCMSR_POWER_MANAGEMENT_CAPABILITY_IDENTIFIER_REG                     0xC0    /*byte*/
 3636 /*
 3637 ***********************************************************************************
 3638 **  Power Management Next Item Pointer Register - PM_NXTP
 3639 **
 3640 **  The Next Item Pointer Register bits adhere to the definitions in the PCI Local Bus Specification,
 3641 **  Revision 2.3. This register describes the location of the next item in the functionˇ¦s capability list.
 3642 **  For the 80331, the next capability (MSI capability list) is located at off-set D0H.
 3643 **  -----------------------------------------------------------------
 3644 **  Bit       Default                       Description
 3645 **  07:00       D0H                         Next_ Item_ Pointer - This field provides an offset into the functionˇ¦s configuration space pointing to the
 3646 **                          next item in the functionˇ¦s capability list which in the 80331 is the MSI extended capabilities header.
 3647 ***********************************************************************************
 3648 */
 3649 #define     ARCMSR_POWER_NEXT_ITEM_PTR_REG                        0xC1    /*byte*/
 3650 /*
 3651 ***********************************************************************************
 3652 **  Power Management Capabilities Register - PM_CAP
 3653 **  
 3654 **  Power Management Capabilities bits adhere to the definitions in the PCI Bus Power Management
 3655 **  Interface Specification, Revision 1.1. This register is a 16-bit read-only register which provides
 3656 **  information on the capabilities of the ATU function related to power management.
 3657 **  -----------------------------------------------------------------
 3658 **  Bit       Default                       Description
 3659 **  15:11   00000 2                         PME_Support - This function is not capable of asserting the PME# signal in any state, since PME# 
 3660 **                                          is not supported by the 80331.
 3661 **  10          0 2                         D2_Support - This bit is set to 0 2 indicating that the 80331 does not support the D2 Power Management State
 3662 **  9           1 2                         D1_Support - This bit is set to 1 2 indicating that the 80331 supports the D1 Power Management State
 3663 **  8:6       000 2                         Aux_Current - This field is set to 000 2 indicating that the 80331 has no current requirements for the
 3664 **                                                          3.3Vaux signal as defined in the PCI Bus Power Management Interface Specification, Revision 1.1
 3665 **  5           0 2                         DSI - This field is set to 0 2 meaning that this function requires a device specific initialization sequence
 3666 **                                                          following the transition to the D0 uninitialized state.
 3667 **  4           0 2                         Reserved.
 3668 **  3           0 2                         PME Clock - Since the 80331 does not support PME# signal generation this bit is cleared to 0 2 .
 3669 **  2:0       010 2                         Version - Setting these bits to 010 2 means that this function complies with PCI Bus Power Management 
 3670 **                                          Interface Specification, Revision 1.1
 3671 ***********************************************************************************
 3672 */
 3673 #define     ARCMSR_POWER_MANAGEMENT_CAPABILITY_REG                        0xC2    /*word 0xC3,0xC2*/
 3674 /*
 3675 ***********************************************************************************
 3676 **  Power Management Control/Status Register - PM_CSR
 3677 **
 3678 **  Power Management Control/Status bits adhere to the definitions in the PCI Bus Power
 3679 **  Management Interface Specification, Revision 1.1. This 16-bit register is the control and status
 3680 **  interface for the power management extended capability.
 3681 **  -----------------------------------------------------------------
 3682 **  Bit       Default                       Description
 3683 **  15          0 2                         PME_Status - This function is not capable of asserting the PME# signal in any state, since PME## is not
 3684 **                                          supported by the 80331.
 3685 **  14:9        00H                         Reserved
 3686 **  8           0 2                         PME_En - This bit is hardwired to read-only 0 2 since this function does not support PME# 
 3687 **                                          generation from any power state.
 3688 **  7:2    000000 2                         Reserved
 3689 **  1:0        00 2                         Power State - This 2-bit field is used both to determine the current power state 
 3690 **                                          of a function and to set the function into a new power state. The definition of the values is:
 3691 **                                                      00 2 - D0
 3692 **                                                      01 2 - D1
 3693 **                                                      10 2 - D2 (Unsupported)
 3694 **                                                      11 2 - D3 hot
 3695 **                                                      The 80331 supports only the D0 and D3 hot states.
 3696 **
 3697 ***********************************************************************************
 3698 */
 3699 #define     ARCMSR_POWER_MANAGEMENT_CONTROL_STATUS_REG                    0xC4    /*word 0xC5,0xC4*/
 3700 /*
 3701 ***********************************************************************************
 3702 **  PCI-X Capability Identifier Register - PX_CAPID
 3703 **  
 3704 **  The Capability Identifier Register bits adhere to the definitions in the PCI Local Bus Specification,
 3705 **  Revision 2.3. This register in the PCI Extended Capability header identifies the type of Extended
 3706 **  Capability contained in that header. In the case of the 80331, this is the PCI-X extended capability with
 3707 **  an ID of 07H as defined by the PCI-X Addendum to the PCI Local Bus Specification, Revision 1.0a.
 3708 **  -----------------------------------------------------------------
 3709 **  Bit       Default                       Description
 3710 **  07:00       07H                         Cap_Id - This field with itsˇ¦ 07H value identifies this item in the linked list of Extended Capability
 3711 **                                          Headers as being the PCI-X capability registers.
 3712 ***********************************************************************************
 3713 */
 3714 #define     ARCMSR_PCIX_CAPABILITY_IDENTIFIER_REG                         0xE0    /*byte*/
 3715 /*
 3716 ***********************************************************************************
 3717 **  PCI-X Next Item Pointer Register - PX_NXTP
 3718 **  
 3719 **  The Next Item Pointer Register bits adhere to the definitions in the PCI Local Bus Specification,
 3720 **  Revision 2.3. This register describes the location of the next item in the functionˇ¦s capability list.
 3721 **  By default, the PCI-X capability is the last capabilities list for the 80331, thus this register defaults
 3722 **  to 00H.
 3723 **  However, this register may be written to B8H prior to host configuration to include the VPD
 3724 **  capability located at off-set B8H.
 3725 **  Warning: Writing this register to any value other than 00H (default) or B8H is not supported and may
 3726 **  produce unpredictable system behavior.
 3727 **  In order to guarantee that this register is written prior to host configuration, the 80331 must be
 3728 **  initialized at P_RST# assertion to Retry Type 0 configuration cycles (bit 2 of PCSR). Typically,
 3729 **  the Intel XScale core would be enabled to boot immediately following P_RST# assertion in
 3730 **  this case (bit 1 of PCSR), as well. Please see Table 125, ˇ§PCI Configuration and Status Register -
 3731 **  PCSRˇ¨ on page 253 for more details on the 80331 initialization modes.
 3732 **  -----------------------------------------------------------------
 3733 **  Bit       Default                       Description
 3734 **  07:00       00H                         Next_ Item_ Pointer - This field provides an offset into the functionˇ¦s configuration space pointing to the
 3735 **                      next item in the functionˇ¦s capability list. Since the PCI-X capabilities are the last in the linked list of
 3736 **                      extended capabilities in the 80331, the register is set to 00H.
 3737 **                      However, this field may be written prior to host configuration with B8H to extend the list to include the
 3738 **                      VPD extended capabilities header.
 3739 ***********************************************************************************
 3740 */
 3741 #define     ARCMSR_PCIX_NEXT_ITEM_PTR_REG                         0xE1    /*byte*/
 3742 /*
 3743 ***********************************************************************************
 3744 **  PCI-X Command Register - PX_CMD
 3745 **  
 3746 **  This register controls various modes and features of ATU and Message Unit when operating in the
 3747 **  PCI-X mode.
 3748 **  -----------------------------------------------------------------
 3749 **  Bit       Default                       Description
 3750 **  15:7     000000000 2                    Reserved.
 3751 **  6:4        011 2                        Maximum Outstanding Split Transactions - This register sets the maximum number of Split Transactions
 3752 **                      the device is permitted to have outstanding at one time.
 3753 **                      Register Maximum Outstanding
 3754 **                                      0 1
 3755 **                                      1 2
 3756 **                                      2 3
 3757 **                                      3 4
 3758 **                                      4 8
 3759 **                                      5 12
 3760 **                                      6 16
 3761 **                                      7 32
 3762 **  3:2        00 2                         Maximum Memory Read Byte Count - This register sets the maximum byte count the device uses when
 3763 **                      initiating a Sequence with one of the burst memory read commands.
 3764 **                      Register Maximum Byte Count
 3765 **                                      0 512
 3766 **                                      1 1024
 3767 **                                      2 2048
 3768 **                                      3 4096
 3769 **                                      1 0 2
 3770 **                      Enable Relaxed Ordering - The 80331 does not set the relaxed ordering bit in the Requester Attributes
 3771 **                      of Transactions.
 3772 **  0          0 2                          Data Parity Error Recovery Enable - The device driver sets this bit to enable the device to attempt to
 3773 **                      recover from data parity errors. When this bit is 0 and the device is in PCI-X mode, the device asserts
 3774 **                      SERR# (when enabled) whenever the Master Data Parity Error bit (Status register, bit 8) is set.
 3775 ***********************************************************************************
 3776 */
 3777 #define     ARCMSR_PCIX_COMMAND_REG                       0xE2    /*word 0xE3,0xE2*/
 3778 /*
 3779 ***********************************************************************************
 3780 **  PCI-X Status Register - PX_SR
 3781 **  
 3782 **  This register identifies the capabilities and current operating mode of ATU, DMAs and Message
 3783 **  Unit when operating in the PCI-X mode.
 3784 **  -----------------------------------------------------------------
 3785 **  Bit       Default                       Description
 3786 **  31:30       00 2                        Reserved
 3787 **  29           0 2                        Received Split Completion Error Message - This bit is set when the device receives a Split Completion
 3788 **                                      Message with the Split Completion Error attribute bit set. Once set, this bit remains set until software
 3789 **                                      writes a 1 to this location.
 3790 **                                      0=no Split Completion error message received.
 3791 **                                      1=a Split Completion error message has been received.
 3792 **  28:26      001 2                        Designed Maximum Cumulative Read Size (DMCRS) - The value of this register depends on the setting
 3793 **                                      of the Maximum Memory Read Byte Count field of the PCIXCMD register:
 3794 **                                      DMCRS Max ADQs Maximum Memory Read Byte Count Register Setting
 3795 **                                      1 16 512 (Default)
 3796 **                                      2 32 1024
 3797 **                                      2 32 2048
 3798 **                                      2 32 4096
 3799 **  25:23      011 2                        Designed Maximum Outstanding Split Transactions - The 80331 can have up to four outstanding split transactions.
 3800 **  22:21       01 2                        Designed Maximum Memory Read Byte Count - The 80331 can generate memory reads with byte counts up 
 3801 **                                          to 1024 bytes.
 3802 **  20           1 2                        80331 is a complex device.
 3803 **  19           0 2                        Unexpected Split Completion - This bit is set when an unexpected Split Completion with this deviceˇ¦s
 3804 **                                      Requester ID is received. Once set, this bit remains set until software writes a 1 to this location.
 3805 **                                      0=no unexpected Split Completion has been received.
 3806 **                                      1=an unexpected Split Completion has been received.
 3807 **  18           0 2                        Split Completion Discarded - This bit is set when the device discards a Split Completion because the
 3808 **                                      requester would not accept it. See Section 5.4.4 of the PCI-X Addendum to the PCI Local Bus
 3809 **                                      Specification, Revision 1.0a for details. Once set, this bit remains set until software writes a 1 to this
 3810 **                                      location.
 3811 **                                      0=no Split Completion has been discarded.
 3812 **                                      1=a Split Completion has been discarded.
 3813 **              NOTE: The 80331 does not set this bit since there is no Inbound address responding to Inbound Read
 3814 **                      Requests with Split Responses (Memory or Register) that has ˇ§read side effects.ˇ¨
 3815 **  17           1 2                        80331 is a 133 MHz capable device.
 3816 **  16           1 2 or P_32BITPCI#     80331 with bridge enabled (BRG_EN=1) implements the ATU with a 64-bit interface on the secondary PCI bus, 
 3817 **                                      therefore this bit is always set.
 3818 **                      80331 with no bridge and central resource disabled (BRG_EN=0, ARB_EN=0), 
 3819 **                      use this bit to identify the add-in card to the system as 64-bit or 32-bit wide via a user-configurable strap (P_32BITPCI#). 
 3820 **                      This strap, by default, identifies the add in card based on 80331 with bridge disabled 
 3821 **                      as 64-bit unless the user attaches the appropriate pull-down resistor to the strap.
 3822 **                      0=The bus is 32 bits wide.
 3823 **                      1=The bus is 64 bits wide.
 3824 **  15:8         FFH                        Bus Number - This register is read for diagnostic purposes only. It indicates the number of the bus
 3825 **                      segment for the device containing this function. The function uses this number as part of its Requester
 3826 **                      ID and Completer ID. For all devices other than the source bridge, each time the function is addressed
 3827 **                      by a Configuration Write transaction, the function must update this register with the contents of AD[7::0]
 3828 **                      of the attribute phase of the Configuration Write, regardless of which register in the function is
 3829 **                      addressed by the transaction. The function is addressed by a Configuration Write transaction when all of
 3830 **                      the following are true:
 3831 **                      1. The transaction uses a Configuration Write command.
 3832 **                      2. IDSEL is asserted during the address phase.
 3833 **                      3. AD[1::0] are 00b (Type 0 configuration transaction).
 3834 **                      4. AD[10::08] of the configuration address contain the appropriate function number.
 3835 **  7:3          1FH                        Device Number - This register is read for diagnostic purposes only. It indicates the number of the device
 3836 **                      containing this function, i.e., the number in the Device Number field (AD[15::11]) of the address of a
 3837 **                      Type 0 configuration transaction that is assigned to the device containing this function by the connection
 3838 **                      of the system hardware. The system must assign a device number other than 00h (00h is reserved for
 3839 **                      the source bridge). The function uses this number as part of its Requester ID and Completer ID. Each
 3840 **                      time the function is addressed by a Configuration Write transaction, the device must update this register
 3841 **                      with the contents of AD[15::11] of the address phase of the Configuration Write, regardless of which
 3842 **                      register in the function is addressed by the transaction. The function is addressed by a Configuration
 3843 **                      Write transaction when all of the following are true:
 3844 **                      1. The transaction uses a Configuration Write command.
 3845 **                      2. IDSEL is asserted during the address phase.
 3846 **                      3. AD[1::0] are 00b (Type 0 configuration transaction).
 3847 **                      4. AD[10::08] of the configuration address contain the appropriate function number.
 3848 **  2:0        000 2                        Function Number - This register is read for diagnostic purposes only. It indicates the number of this
 3849 **                      function; i.e., the number in the Function Number field (AD[10::08]) of the address of a Type 0
 3850 **                      configuration transaction to which this function responds. The function uses this number as part of its
 3851 **                      Requester ID and Completer ID.
 3852 **
 3853 **************************************************************************
 3854 */
 3855 #define     ARCMSR_PCIX_STATUS_REG                        0xE4    /*dword 0xE7,0xE6,0xE5,0xE4*/
 3856 
 3857 /*
 3858 **************************************************************************
 3859 **                 Inbound Read Transaction
 3860 **  ========================================================================
 3861 **      An inbound read transaction is initiated by a PCI initiator and is targeted at either 80331 local
 3862 **      memory or a 80331 memory-mapped register space. The read transaction is propagated through
 3863 **      the inbound transaction queue (ITQ) and read data is returned through the inbound read queue
 3864 **      (IRQ).
 3865 **      When operating in the conventional PCI mode, all inbound read transactions are processed as
 3866 **      delayed read transactions. When operating in the PCI-X mode, all inbound read transactions are
 3867 **      processed as split transactions. The ATUs PCI interface claims the read transaction and forwards
 3868 **      the read request through to the internal bus and returns the read data to the PCI bus. Data flow for
 3869 **      an inbound read transaction on the PCI bus is summarized in the following statements:
 3870 **      ˇE The ATU claims the PCI read transaction when the PCI address is within the inbound
 3871 **      translation window defined by ATU Inbound Base Address Register (and Inbound Upper Base
 3872 **      Address Register during DACs) and Inbound Limit Register.
 3873 **      ˇE When operating in the conventional PCI mode, when the ITQ is currently holding transaction
 3874 **      information from a previous delayed read, the current transaction information is compared to
 3875 **      the previous transaction information (based on the setting of the DRC Alias bit in
 3876 **      Section 3.10.39, ˇ§ATU Configuration Register - ATUCRˇ¨ on page 252). When there is a
 3877 **      match and the data is in the IRQ, return the data to the master on the PCI bus. When there is a
 3878 **      match and the data is not available, a Retry is signaled with no other action taken. When there
 3879 **      is not a match and when the ITQ has less than eight entries, capture the transaction
 3880 **      information, signal a Retry and initiate a delayed transaction. When there is not a match and
 3881 **      when the ITQ is full, then signal a Retry with no other action taken.
 3882 **      ˇX When an address parity error is detected, the address parity response defined in
 3883 **      Section 3.7 is used.
 3884 **      ˇE When operating in the conventional PCI mode, once read data is driven onto the PCI bus from
 3885 **      the IRQ, it continues until one of the following is true:
 3886 **      ˇX The initiator completes the PCI transaction. When there is data left unread in the IRQ, the
 3887 **      data is flushed.
 3888 **      ˇX An internal bus Target Abort was detected. In this case, the QWORD associated with the
 3889 **      Target Abort is never entered into the IRQ, and therefore is never returned.
 3890 **      ˇX Target Abort or a Disconnect with Data is returned in response to the Internal Bus Error.
 3891 **      ˇX The IRQ becomes empty. In this case, the PCI interface signals a Disconnect with data to
 3892 **      the initiator on the last data word available.
 3893 **      ˇE When operating in the PCI-X mode, when ITQ is not full, the PCI address, attribute and
 3894 **      command are latched into the available ITQ and a Split Response Termination is signalled to
 3895 **      the initiator.
 3896 **      ˇE When operating in the PCI-X mode, when the transaction does not cross a 1024 byte aligned
 3897 **      boundary, then the ATU waits until it receives the full byte count from the internal bus target
 3898 **      before returning read data by generating the split completion transaction on the PCI-X bus.
 3899 **      When the read requested crosses at least one 1024 byte boundary, then ATU completes the
 3900 **      transfer by returning data in 1024 byte aligned chunks.
 3901 **      ˇE When operating in the PCI-X mode, once a split completion transaction has started, it
 3902 **      continues until one of the following is true:
 3903 **      ˇX The requester (now the target) generates a Retry Termination, or a Disconnection at Next
 3904 **      ADB (when the requester is a bridge)
 3905 **      ˇX The byte count is satisfied.
 3906 **      ˇX An internal bus Target Abort was detected. The ATU generates a Split Completion
 3907 **      Message (message class=2h - completer error, and message index=81h - target abort) to
 3908 **      inform the requester about the abnormal condition. The ITQ for this transaction is flushed.
 3909 **      Refer to Section 3.7.1.
 3910 **      ˇX An internal bus Master Abort was detected. The ATU generates a Split Completion
 3911 **      Message (message class=2h - completer error, and message index=80h - Master abort) to
 3912 **      inform the requester about the abnormal condition. The ITQ for this transaction is flushed.
 3913 **      Refer to Section 3.7.1
 3914 **      ˇE When operating in the conventional PCI mode, when the master inserts wait states on the PCI
 3915 **      bus, the ATU PCI slave interface waits with no premature disconnects.
 3916 **      ˇE When a data parity error occurs signified by PERR# asserted from the initiator, no action is
 3917 **      taken by the target interface. Refer to Section 3.7.2.5.
 3918 **      ˇE When operating in the conventional PCI mode, when the read on the internal bus is
 3919 **      target-aborted, either a target-abort or a disconnect with data is signaled to the initiator. This is
 3920 **      based on the ATU ECC Target Abort Enable bit (bit 0 of the ATUIMR for ATU). When set, a
 3921 **      target abort is used, when clear, a disconnect is used.
 3922 **      ˇE When operating in the PCI-X mode (with the exception of the MU queue ports at offsets 40h
 3923 **      and 44h), when the transaction on the internal bus resulted in a target abort, the ATU generates
 3924 **      a Split Completion Message (message class=2h - completer error, and message index=81h -
 3925 **      internal bus target abort) to inform the requester about the abnormal condition. For the MU
 3926 **      queue ports, the ATU returns either a target abort or a single data phase disconnect depending
 3927 **      on the ATU ECC Target Abort Enable bit (bit 0 of the ATUIMR for ATU). The ITQ for this
 3928 **      transaction is flushed. Refer to Section 3.7.1.
 3929 **      ˇE When operating in the conventional PCI mode, when the transaction on the internal bus
 3930 **      resulted in a master abort, the ATU returns a target abort to inform the requester about the
 3931 **      abnormal condition. The ITQ for this transaction is flushed. Refer to Section 3.7.1
 3932 **      ˇE When operating in the PCI-X mode, when the transaction on the internal bus resulted in a
 3933 **      master abort, the ATU generates a Split Completion Message (message class=2h - completer
 3934 **      error, and message index=80h - internal bus master abort) to inform the requester about the
 3935 **      abnormal condition. The ITQ for this transaction is flushed. Refer to Section 3.7.1.
 3936 **      ˇE When operating in the PCI-X mode, when the Split Completion transaction completes with
 3937 **      either Master-Abort or Target-Abort, the requester is indicating a failure condition that
 3938 **      prevents it from accepting the completion it requested. In this case, since the Split Request
 3939 **      addresses a location that has no read side effects, the completer must discard the Split
 3940 **      Completion and take no further action.
 3941 **      The data flow for an inbound read transaction on the internal bus is summarized in the following
 3942 **      statements:
 3943 **      ˇE The ATU internal bus master interface requests the internal bus when a PCI address appears in
 3944 **              an ITQ and transaction ordering has been satisfied. When operating in the PCI-X mode the
 3945 **              ATU does not use the information provided by the Relax Ordering Attribute bit. That is, ATU
 3946 **              always uses conventional PCI ordering rules.
 3947 **      ˇE Once the internal bus is granted, the internal bus master interface drives the translated address
 3948 **              onto the bus and wait for IB_DEVSEL#. When a Retry is signaled, the request is repeated.
 3949 **              When a master abort occurs, the transaction is considered complete and a target abort is loaded
 3950 **              into the associated IRQ for return to the PCI initiator (transaction is flushed once the PCI
 3951 **              master has been delivered the target abort).
 3952 **      ˇE Once the translated address is on the bus and the transaction has been accepted, the internal
 3953 **              bus target starts returning data with the assertion of IB_TRDY#. Read data is continuously
 3954 **              received by the IRQ until one of the following is true:
 3955 **      ˇX The full byte count requested by the ATU read request is received. The ATU internal bus
 3956 **          initiator interface performs a initiator completion in this case.
 3957 **      ˇX When operating in the conventional PCI mode, a Target Abort is received on the internal
 3958 **              bus from the internal bus target. In this case, the transaction is aborted and the PCI side is
 3959 **              informed.
 3960 **      ˇX When operating in the PCI-X mode, a Target Abort is received on the internal bus from
 3961 **              the internal bus target. In this case, the transaction is aborted. The ATU generates a Split
 3962 **              Completion Message (message class=2h - completer error, and message index=81h -
 3963 **              target abort) on the PCI bus to inform the requester about the abnormal condition. The
 3964 **              ITQ for this transaction is flushed.
 3965 **      ˇX When operating in the conventional PCI mode, a single data phase disconnection is
 3966 **              received from the internal bus target. When the data has not been received up to the next
 3967 **              QWORD boundary, the ATU internal bus master interface attempts to reacquire the bus.
 3968 **              When not, the bus returns to idle.
 3969 **      ˇX When operating in the PCI-X mode, a single data phase disconnection is received from
 3970 **              the internal bus target. The ATU IB initiator interface attempts to reacquire the bus to
 3971 **              obtain remaining data.
 3972 **      ˇX When operating in the conventional PCI mode, a disconnection at Next ADB is received
 3973 **          from the internal bus target. The bus returns to idle.
 3974 **      ˇX When operating in the PCI-X mode, a disconnection at Next ADB is received from the
 3975 **              internal bus target. The ATU IB initiator interface attempts to reacquire the bus to obtain
 3976 **              remaining data.
 3977 **              To support PCI Local Bus Specification, Revision 2.0 devices, the ATU can be programmed to
 3978 **              ignore the memory read command (Memory Read, Memory Read Line, and Memory Read
 3979 **              Multiple) when trying to match the current inbound read transaction with data in a DRC queue
 3980 **              which was read previously (DRC on target bus). When the Read Command Alias Bit in the
 3981 **              ATUCR register is set, the ATU does not distinguish the read commands on transactions. For
 3982 **              example, the ATU enqueues a DRR with a Memory Read Multiple command and performs the read
 3983 **              on the internal bus. Some time later, a PCI master attempts a Memory Read with the same address
 3984 **              as the previous Memory Read Multiple. When the Read Command Bit is set, the ATU would return
 3985 **              the read data from the DRC queue and consider the Delayed Read transaction complete. When the
 3986 **              Read Command bit in the ATUCR was clear, the ATU would not return data since the PCI read
 3987 **              commands did not match, only the address.
 3988 **************************************************************************
 3989 */
 3990 /*
 3991 **************************************************************************
 3992 **                    Inbound Write Transaction
 3993 **========================================================================
 3994 **        An inbound write transaction is initiated by a PCI master and is targeted at either 80331 local
 3995 **        memory or a 80331 memory-mapped register.
 3996 **      Data flow for an inbound write transaction on the PCI bus is summarized as:
 3997 **      ˇE The ATU claims the PCI write transaction when the PCI address is within the inbound
 3998 **        translation window defined by the ATU Inbound Base Address Register (and Inbound Upper
 3999 **        Base Address Register during DACs) and Inbound Limit Register.
 4000 **      ˇE When the IWADQ has at least one address entry available and the IWQ has at least one buffer
 4001 **        available, the address is captured and the first data phase is accepted.
 4002 **      ˇE The PCI interface continues to accept write data until one of the following is true:
 4003 **        ˇX The initiator performs a disconnect.
 4004 **        ˇX The transaction crosses a buffer boundary.
 4005 **      ˇE When an address parity error is detected during the address phase of the transaction, the
 4006 **        address parity error mechanisms are used. Refer to Section 3.7.1 for details of the address
 4007 **        parity error response.
 4008 **      ˇE When operating in the PCI-X mode when an attribute parity error is detected, the attribute
 4009 **        parity error mechanism described in Section 3.7.1 is used.
 4010 **      ˇE When a data parity error is detected while accepting data, the slave interface sets the
 4011 **        appropriate bits based on PCI specifications. No other action is taken. Refer to Section 3.7.2.6
 4012 **        for details of the inbound write data parity error response.
 4013 **        Once the PCI interface places a PCI address in the IWADQ, when IWQ has received data sufficient
 4014 **        to cross a buffer boundary or the master disconnects on the PCI bus, the ATUs internal bus
 4015 **        interface becomes aware of the inbound write. When there are additional write transactions ahead
 4016 **        in the IWQ/IWADQ, the current transaction remains posted until ordering and priority have been
 4017 **        satisfied (Refer to Section 3.5.3) and the transaction is attempted on the internal bus by the ATU
 4018 **        internal master interface. The ATU does not insert target wait states nor do data merging on the PCI
 4019 **        interface, when operating in the PCI mode.
 4020 **        In the PCI-X mode memory writes are always executed as immediate transactions, while
 4021 **        configuration write transactions are processed as split transactions. The ATU generates a Split
 4022 **        Completion Message, (with Message class=0h - Write Completion Class and Message index =
 4023 **        00h - Write Completion Message) once a configuration write is successfully executed.
 4024 **        Also, when operating in the PCI-X mode a write sequence may contain multiple write transactions.
 4025 **        The ATU handles such transactions as independent transactions.
 4026 **        Data flow for the inbound write transaction on the internal bus is summarized as:
 4027 **      ˇE The ATU internal bus master requests the internal bus when IWADQ has at least one entry
 4028 **        with associated data in the IWQ.
 4029 **      ˇE When the internal bus is granted, the internal bus master interface initiates the write
 4030 **        transaction by driving the translated address onto the internal bus. For details on inbound
 4031 **        address translation.
 4032 **      ˇE When IB_DEVSEL# is not returned, a master abort condition is signaled on the internal bus.
 4033 **        The current transaction is flushed from the queue and SERR# may be asserted on the PCI
 4034 **        interface.
 4035 **      ˇE The ATU initiator interface asserts IB_REQ64# to attempt a 64-bit transfer. When
 4036 **        IB_ACK64# is not returned, a 32-bit transfer is used. Transfers of less than 64-bits use the
 4037 **        IB_C/BE[7:0]# to mask the bytes not written in the 64-bit data phase. Write data is transferred
 4038 **        from the IWQ to the internal bus when data is available and the internal bus interface retains
 4039 **        internal bus ownership.
 4040 **      ˇE The internal bus interface stops transferring data from the current transaction to the internal
 4041 **        bus when one of the following conditions becomes true:
 4042 **      ˇX The internal bus initiator interface loses bus ownership. The ATU internal initiator
 4043 **        terminates the transfer (initiator disconnection) at the next ADB (for the internal bus ADB
 4044 **        is defined as a naturally aligned 128-byte boundary) and attempt to reacquire the bus to
 4045 **        complete the delivery of remaining data using the same sequence ID but with the
 4046 **        modified starting address and byte count.
 4047 **      ˇX A Disconnect at Next ADB is signaled on the internal bus from the internal target. When
 4048 **        the transaction in the IWQ completes at that ADB, the initiator returns to idle. When the
 4049 **        transaction in the IWQ is not complete, the initiator attempts to reacquire the bus to
 4050 **        complete the delivery of remaining data using the same sequence ID but with the
 4051 **        modified starting address and byte count.
 4052 **      ˇX A Single Data Phase Disconnect is signaled on the internal bus from the internal target.
 4053 **        When the transaction in the IWQ needs only a single data phase, the master returns to idle.
 4054 **        When the transaction in the IWQ is not complete, the initiator attempts to reacquire the
 4055 **        bus to complete the delivery of remaining data using the same sequence ID but with the
 4056 **        modified starting address and byte count.
 4057 **      ˇX The data from the current transaction has completed (satisfaction of byte count). An
 4058 **        initiator termination is performed and the bus returns to idle.
 4059 **      ˇX A Master Abort is signaled on the internal bus. SERR# may be asserted on the PCI bus.
 4060 **        Data is flushed from the IWQ.
 4061 *****************************************************************
 4062 */
 4063 
 4064 
 4065 
 4066 /*
 4067 **************************************************************************
 4068 **               Inbound Read Completions Data Parity Errors
 4069 **========================================================================
 4070 **      As an initiator, the ATU may encounter this error condition when operating in the PCI-X mode.
 4071 **      When as the completer of a Split Read Request the ATU observes PERR# assertion during the split
 4072 **      completion transaction, the ATU attempts to complete the transaction normally and no further
 4073 **      action is taken.
 4074 **************************************************************************
 4075 */
 4076 
 4077 /*
 4078 **************************************************************************
 4079 **               Inbound Configuration Write Completion Message Data Parity Errors
 4080 **========================================================================
 4081 **  As an initiator, the ATU may encounter this error condition when operating in the PCI-X mode.
 4082 **  When as the completer of a Configuration (Split) Write Request the ATU observes PERR#
 4083 **  assertion during the split completion transaction, the ATU attempts to complete the transaction
 4084 **  normally and no further action is taken.
 4085 **************************************************************************
 4086 */
 4087 
 4088 /*
 4089 **************************************************************************
 4090 **              Inbound Read Request Data Parity Errors
 4091 **===================== Immediate Data Transfer ==========================
 4092 **  As a target, the ATU may encounter this error when operating in the Conventional PCI or PCI-X modes.
 4093 **  Inbound read data parity errors occur when read data delivered from the IRQ is detected as having
 4094 **  bad parity by the initiator of the transaction who is receiving the data. The initiator may optionally
 4095 **  report the error to the system by asserting PERR#. As a target device in this scenario, no action is
 4096 **  required and no error bits are set.
 4097 **=====================Split Response Termination=========================
 4098 **  As a target, the ATU may encounter this error when operating in the PCI-X mode.
 4099 **  Inbound read data parity errors occur during the Split Response Termination. The initiator may
 4100 **  optionally report the error to the system by asserting PERR#. As a target device in this scenario, no
 4101 **  action is required and no error bits are set.
 4102 **************************************************************************
 4103 */
 4104 
 4105 /*
 4106 **************************************************************************
 4107 **              Inbound Write Request Data Parity Errors
 4108 **========================================================================
 4109 **      As a target, the ATU may encounter this error when operating in the Conventional or PCI-X modes.
 4110 **      Data parity errors occurring during write operations received by the ATU may assert PERR# on
 4111 **      the PCI Bus. When an error occurs, the ATU continues accepting data until the initiator of the write
 4112 **      transaction completes or a queue fill condition is reached. Specifically, the following actions with
 4113 **      the given constraints are taken by the ATU:
 4114 **      ˇE PERR# is asserted two clocks cycles (three clock cycles when operating in the PCI-X mode)
 4115 **      following the data phase in which the data parity error is detected on the bus. This is only
 4116 **      done when the Parity Error Response bit in the ATUCMD is set.
 4117 **      ˇE The Detected Parity Error bit in the ATUSR is set. When the ATU sets this bit, additional
 4118 **      actions is taken:
 4119 **      ˇX When the ATU Detected Parity Error Interrupt Mask bit in the ATUIMR is clear, set the
 4120 **      Detected Parity Error bit in the ATUISR. When set, no action.
 4121 ***************************************************************************
 4122 */
 4123 
 4124 
 4125 /*
 4126 ***************************************************************************
 4127 **                 Inbound Configuration Write Request
 4128 **  =====================================================================
 4129 **  As a target, the ATU may encounter this error when operating in the Conventional or PCI-X modes.
 4130 **  ===============================================
 4131 **              Conventional PCI Mode
 4132 **  ===============================================
 4133 **  To allow for correct data parity calculations for delayed write transactions, the ATU delays the
 4134 **  assertion of STOP# (signalling a Retry) until PAR is driven by the master. A parity error during a
 4135 **  delayed write transaction (inbound configuration write cycle) can occur in any of the following
 4136 **  parts of the transactions:
 4137 **  ˇE During the initial Delayed Write Request cycle on the PCI bus when the ATU latches the
 4138 **  address/command and data for delayed delivery to the internal configuration register.
 4139 **  ˇE During the Delayed Write Completion cycle on the PCI bus when the ATU delivers the status
 4140 **  of the operation back to the original master.
 4141 **  The 80331 ATU PCI interface has the following responses to a delayed write parity error for
 4142 **  inbound transactions during Delayed Write Request cycles with the given constraints:
 4143 **  ˇE When the Parity Error Response bit in the ATUCMD is set, the ATU asserts TRDY#
 4144 **  (disconnects with data) and two clock cycles later asserts PERR# notifying the initiator of the
 4145 **  parity error. The delayed write cycle is not enqueued and forwarded to the internal bus.
 4146 **  When the Parity Error Response bit in the ATUCMD is cleared, the ATU retries the
 4147 **  transaction by asserting STOP# and enqueues the Delayed Write Request cycle to be
 4148 **  forwarded to the internal bus. PERR# is not asserted.
 4149 **  ˇE The Detected Parity Error bit in the ATUSR is set. When the ATU sets this bit, additional
 4150 **  actions is taken:
 4151 **  ˇX When the ATU Detected Parity Error Interrupt Mask bit in the ATUIMR is clear, set the
 4152 **  Detected Parity Error bit in the ATUISR. When set, no action.
 4153 **  For the original write transaction to be completed, the initiator retries the transaction on the PCI
 4154 **  bus and the ATU returns the status from the internal bus, completing the transaction.
 4155 **  For the Delayed Write Completion transaction on the PCI bus where a data parity error occurs and
 4156 **  therefore does not agree with the status being returned from the internal bus (i.e. status being
 4157 **  returned is normal completion) the ATU performs the following actions with the given constraints:
 4158 **  ˇE When the Parity Error Response Bit is set in the ATUCMD, the ATU asserts TRDY#
 4159 **  (disconnects with data) and two clocks later asserts PERR#. The Delayed Completion cycle in
 4160 **  the IDWQ remains since the data of retried command did not match the data within the queue.
 4161 **  ˇE The Detected Parity Error bit in the ATUSR is set. When the ATU sets this bit, additional
 4162 **  actions is taken:
 4163 **  ˇX When the ATU Detected Parity Error Interrupt Mask bit in the ATUIMR is clear, set the
 4164 **  Detected Parity Error bit in the ATUISR. When set, no action.
 4165 **  =================================================== 
 4166 **                       PCI-X Mode
 4167 **  ===================================================
 4168 **  Data parity errors occurring during configuration write operations received by the ATU may cause
 4169 **  PERR# assertion and delivery of a Split Completion Error Message on the PCI Bus. When an error
 4170 **  occurs, the ATU accepts the write data and complete with a Split Response Termination.
 4171 **  Specifically, the following actions with the given constraints are then taken by the ATU:
 4172 **  ˇE When the Parity Error Response bit in the ATUCMD is set, PERR# is asserted three clocks
 4173 **  cycles following the Split Response Termination in which the data parity error is detected on
 4174 **  the bus. When the ATU asserts PERR#, additional actions is taken:
 4175 **  ˇX A Split Write Data Parity Error message (with message class=2h - completer error and
 4176 **  message index=01h - Split Write Data Parity Error) is initiated by the ATU on the PCI bus
 4177 **  that addresses the requester of the configuration write.
 4178 **  ˇX When the Initiated Split Completion Error Message Interrupt Mask in the ATUIMR is
 4179 **  clear, set the Initiated Split Completion Error Message bit in the ATUISR. When set, no
 4180 **  action.
 4181 **  ˇX The Split Write Request is not enqueued and forwarded to the internal bus.
 4182 **  ˇE The Detected Parity Error bit in the ATUSR is set. When the ATU sets this bit, additional
 4183 **  actions is taken:
 4184 **  ˇX When the ATU Detected Parity Error Interrupt Mask bit in the ATUIMR is clear, set the
 4185 **  Detected Parity Error bit in the ATUISR. When set, no action.
 4186 **
 4187 ***************************************************************************
 4188 */
 4189 
 4190 /*
 4191 ***************************************************************************
 4192 **                       Split Completion Messages
 4193 **  =======================================================================
 4194 **  As a target, the ATU may encounter this error when operating in the PCI-X mode.
 4195 **  Data parity errors occurring during Split Completion Messages claimed by the ATU may assert
 4196 **  PERR# (when enabled) or SERR# (when enabled) on the PCI Bus. When an error occurs, the
 4197 **  ATU accepts the data and complete normally. Specifically, the following actions with the given
 4198 **  constraints are taken by the ATU:
 4199 **  ˇE PERR# is asserted three clocks cycles following the data phase in which the data parity error
 4200 **  is detected on the bus. This is only done when the Parity Error Response bit in the ATUCMD
 4201 **  is set. When the ATU asserts PERR#, additional actions is taken:
 4202 **  ˇX The Master Parity Error bit in the ATUSR is set.
 4203 **  ˇX When the ATU PCI Master Parity Error Interrupt Mask Bit in the ATUIMR is clear, set the
 4204 **  PCI Master Parity Error bit in the ATUISR. When set, no action.
 4205 **  ˇX When the SERR# Enable bit in the ATUCMD is set, and the Data Parity Error Recover
 4206 **  Enable bit in the PCIXCMD register is clear, assert SERR#; otherwise no action is taken.
 4207 **  When the ATU asserts SERR#, additional actions is taken:
 4208 **  Set the SERR# Asserted bit in the ATUSR.
 4209 **  When the ATU SERR# Asserted Interrupt Mask Bit in the ATUIMR is clear, set the
 4210 **  SERR# Asserted bit in the ATUISR. When set, no action.
 4211 **  When the ATU SERR# Detected Interrupt Enable Bit in the ATUCR is set, set the
 4212 **  SERR# Detected bit in the ATUISR. When clear, no action.
 4213 **  ˇE When the SCE bit (Split Completion Error -- bit 30 of the Completer Attributes) is set during
 4214 **  the Attribute phase, the Received Split Completion Error Message bit in the PCIXSR is set.
 4215 **  When the ATU sets this bit, additional actions is taken:
 4216 **  ˇX When the ATU Received Split Completion Error Message Interrupt Mask bit in the
 4217 **  ATUIMR is clear, set the Received Split Completion Error Message bit in the ATUISR.
 4218 **  When set, no action.
 4219 **  ˇE The Detected Parity Error bit in the ATUSR is set. When the ATU sets this bit, additional
 4220 **  actions is taken:
 4221 **  ˇX When the ATU Detected Parity Error Interrupt Mask bit in the ATUIMR is clear, set the
 4222 **  Detected Parity Error bit in the ATUISR. When set, no action.
 4223 **  ˇE The transaction associated with the Split Completion Message is discarded.
 4224 **  ˇE When the discarded transaction was a read, a completion error message (with message
 4225 **  class=2h - completer error and message index=82h - PCI bus read parity error) is generated on
 4226 **  the internal bus of the 80331.
 4227 *****************************************************************************
 4228 */
 4229 
 4230 
 4231 /*
 4232 ******************************************************************************************************
 4233 **                 Messaging Unit (MU) of the Intel R 80331 I/O processor (80331)
 4234 **  ==================================================================================================
 4235 **      The Messaging Unit (MU) transfers data between the PCI system and the 80331 
 4236 **  notifies the respective system when new data arrives.
 4237 **      The PCI window for messaging transactions is always the first 4 Kbytes of the inbound translation.
 4238 **      window defined by: 
 4239 **                    1.Inbound ATU Base Address Register 0 (IABAR0) 
 4240 **                    2.Inbound ATU Limit Register 0 (IALR0)
 4241 **      All of the Messaging Unit errors are reported in the same manner as ATU errors. 
 4242 **  Error conditions and status can be found in :
 4243 **                                               1.ATUSR 
 4244 **                                               2.ATUISR
 4245 **====================================================================================================
 4246 **     Mechanism        Quantity               Assert PCI Interrupt Signals      Generate I/O Processor Interrupt
 4247 **----------------------------------------------------------------------------------------------------
 4248 **  Message Registers      2 Inbound                   Optional                              Optional
 4249 **                         2 Outbound                
 4250 **----------------------------------------------------------------------------------------------------
 4251 **  Doorbell Registers     1 Inbound                   Optional                              Optional
 4252 **                         1 Outbound  
 4253 **----------------------------------------------------------------------------------------------------
 4254 **  Circular Queues        4 Circular Queues           Under certain conditions              Under certain conditions
 4255 **----------------------------------------------------------------------------------------------------
 4256 **  Index Registers     1004 32-bit Memory Locations   No                                    Optional
 4257 **====================================================================================================
 4258 **     PCI Memory Map: First 4 Kbytes of the ATU Inbound PCI Address Space
 4259 **====================================================================================================
 4260 **  0000H           Reserved
 4261 **  0004H           Reserved
 4262 **  0008H           Reserved
 4263 **  000CH           Reserved
 4264 **------------------------------------------------------------------------
 4265 **  0010H                       Inbound Message Register 0              ]
 4266 **  0014H                       Inbound Message Register 1              ]
 4267 **  0018H                       Outbound Message Register 0             ]
 4268 **  001CH                       Outbound Message Register 1             ]   4 Message Registers
 4269 **------------------------------------------------------------------------
 4270 **  0020H                       Inbound Doorbell Register               ]
 4271 **  0024H                       Inbound Interrupt Status Register       ]
 4272 **  0028H                       Inbound Interrupt Mask Register         ]
 4273 **  002CH                       Outbound Doorbell Register              ]
 4274 **  0030H                       Outbound Interrupt Status Register      ]
 4275 **  0034H                       Outbound Interrupt Mask Register        ]   2 Doorbell Registers and 4 Interrupt Registers
 4276 **------------------------------------------------------------------------
 4277 **  0038H                       Reserved
 4278 **  003CH                       Reserved
 4279 **------------------------------------------------------------------------
 4280 **  0040H                       Inbound Queue Port                      ]
 4281 **  0044H                       Outbound Queue Port                     ]   2 Queue Ports
 4282 **------------------------------------------------------------------------
 4283 **  0048H                       Reserved
 4284 **  004CH                       Reserved
 4285 **------------------------------------------------------------------------
 4286 **  0050H                                                   ]
 4287 **    :                                                     ]
 4288 **    :      Intel Xscale Microarchitecture Local Memory    ]
 4289 **    :                                                     ]
 4290 **  0FFCH                                                   ]   1004 Index Registers
 4291 *******************************************************************************
 4292 */
 4293 /*
 4294 *****************************************************************************
 4295 **                      Theory of MU Operation
 4296 *****************************************************************************
 4297 **--------------------
 4298 **   inbound_msgaddr0:
 4299 **   inbound_msgaddr1:
 4300 **  outbound_msgaddr0:
 4301 **  outbound_msgaddr1:
 4302 **  .  The MU has four independent messaging mechanisms.
 4303 **     There are four Message Registers that are similar to a combination of mailbox and doorbell registers. 
 4304 **     Each holds a 32-bit value and generates an interrupt when written.
 4305 **--------------------
 4306 **   inbound_doorbell:
 4307 **  outbound_doorbell:
 4308 **  .  The two Doorbell Registers support software interrupts. 
 4309 **     When a bit is set in a Doorbell Register, an interrupt is generated.
 4310 **--------------------
 4311 **  inbound_queueport:
 4312 ** outbound_queueport:
 4313 **
 4314 **
 4315 **  .  The Circular Queues support a message passing scheme that uses 4 circular queues. 
 4316 **     The 4 circular queues are implemented in 80331 local memory. 
 4317 **     Two queues are used for inbound messages and two are used for outbound messages. 
 4318 **     Interrupts may be generated when the queue is written.
 4319 **--------------------
 4320 ** local_buffer 0x0050 ....0x0FFF
 4321 **  .  The Index Registers use a portion of the 80331 local memory to implement a large set of message registers. 
 4322 **     When one of the Index Registers is written, an interrupt is generated and the address of the register written is captured.
 4323 **     Interrupt status for all interrupts is recorded in the Inbound Interrupt Status Register and the Outbound Interrupt Status Register. 
 4324 **     Each interrupt generated by the Messaging Unit can be masked.
 4325 **--------------------
 4326 **  .  Multi-DWORD PCI burst accesses are not supported by the Messaging Unit, 
 4327 **     with the exception of Multi-DWORD reads to the index registers. 
 4328 **     In Conventional mode: the MU terminates   Multi-DWORD PCI transactions 
 4329 **     (other than index register reads) with a disconnect at the next Qword boundary, with the exception of queue ports. 
 4330 **     In PCI-X mode       : the MU terminates a Multi-DWORD PCI read transaction with a Split Response 
 4331 **     and the data is returned through split completion transaction(s).
 4332 **     however, when the burst request crosses into or through the range of  offsets 40h to 4Ch 
 4333 **     (e.g., this includes the queue ports) the transaction is signaled target-abort immediately on the PCI bus. 
 4334 **     In PCI-X mode, Multi-DWORD PCI writes is signaled a Single-Data-Phase Disconnect 
 4335 **     which means that no data beyond the first Qword (Dword when the MU does not assert P_ACK64#) is written.
 4336 **--------------------
 4337 **  .  All registers needed to configure and control the Messaging Unit are memory-mapped registers.
 4338 **     The MU uses the first 4 Kbytes of the inbound translation window in the Address Translation Unit (ATU).
 4339 **     This PCI address window is used for PCI transactions that access the 80331 local memory.
 4340 **     The  PCI address of the inbound translation window is contained in the Inbound ATU Base Address Register.
 4341 **--------------------
 4342 **  .  From the PCI perspective, the Messaging Unit is part of the Address Translation Unit.
 4343 **     The Messaging Unit uses the PCI configuration registers of the ATU for control and status information.
 4344 **     The Messaging Unit must observe all PCI control bits in the ATU Command Register and ATU Configuration Register.
 4345 **     The Messaging Unit reports all PCI errors in the ATU Status Register.
 4346 **--------------------
 4347 **  .  Parts of the Messaging Unit can be accessed as a 64-bit PCI device. 
 4348 **     The register interface, message registers, doorbell registers, 
 4349 **     and index registers returns a P_ACK64# in response to a P_REQ64# on the PCI interface. 
 4350 **     Up to 1 Qword of data can be read or written per transaction (except Index Register reads). 
 4351 **     The Inbound and Outbound Queue Ports are always 32-bit addresses and the MU does not assert P_ACK64# to offsets 40H and 44H.
 4352 **************************************************************************
 4353 */
 4354 /*
 4355 **************************************************************************
 4356 **  Message Registers
 4357 **  ==============================
 4358 **  . Messages can be sent and received by the 80331 through the use of the Message Registers. 
 4359 **  . When written, the message registers may cause an interrupt to be generated to either the Intel XScale core or the host processor.
 4360 **  . Inbound messages are sent by the host processor and received by the 80331.
 4361 **    Outbound messages are sent by the 80331 and received by the host processor.
 4362 **  . The interrupt status for outbound messages is recorded in the Outbound Interrupt Status Register.
 4363 **    Interrupt status for inbound messages is recorded in the Inbound Interrupt Status Register.
 4364 **
 4365 **  Inbound Messages:
 4366 **  -----------------
 4367 **  . When an inbound message register is written by an external PCI agent, an interrupt may be generated to the Intel XScale core. 
 4368 **  . The interrupt may be masked by the mask bits in the Inbound Interrupt Mask Register.
 4369 **  . The Intel XScale core interrupt is recorded in the Inbound Interrupt Status Register. 
 4370 **    The interrupt causes the Inbound Message Interrupt bit to be set in the Inbound Interrupt Status Register. 
 4371 **    This is a Read/Clear bit that is set by the MU hardware and cleared by software.
 4372 **    The interrupt is cleared when the Intel XScale core writes a value of 
 4373 **    1 to the Inbound Message Interrupt bit in the Inbound Interrupt Status Register.
 4374 **  ------------------------------------------------------------------------
 4375 **  Inbound Message Register - IMRx
 4376 **
 4377 **  . There are two Inbound Message Registers: IMR0 and IMR1. 
 4378 **  . When the IMR register is written, an interrupt to the Intel XScale core may be generated.
 4379 **    The interrupt is recorded in the Inbound Interrupt Status Register and may be masked 
 4380 **    by the Inbound Message Interrupt Mask bit in the Inbound Interrupt Mask Register.
 4381 **  -----------------------------------------------------------------
 4382 **  Bit       Default                       Description
 4383 **  31:00    0000 0000H                     Inbound Message - This is a 32-bit message written by an external PCI agent. 
 4384 **                                                            When written, an interrupt to the Intel XScale core may be generated.
 4385 **************************************************************************
 4386 */
 4387 #define     ARCMSR_MU_INBOUND_MESSAGE_REG0                        0x10    /*dword 0x13,0x12,0x11,0x10*/
 4388 #define     ARCMSR_MU_INBOUND_MESSAGE_REG1                        0x14    /*dword 0x17,0x16,0x15,0x14*/
 4389 /*
 4390 **************************************************************************
 4391 **  Outbound Message Register - OMRx
 4392 **  --------------------------------
 4393 **  There are two Outbound Message Registers: OMR0 and OMR1. When the OMR register is
 4394 **  written, a PCI interrupt may be generated. The interrupt is recorded in the Outbound Interrupt
 4395 **  Status Register and may be masked by the Outbound Message Interrupt Mask bit in the Outbound
 4396 **  Interrupt Mask Register.
 4397 **
 4398 **  Bit       Default                       Description
 4399 **  31:00    00000000H                      Outbound Message - This is 32-bit message written by the Intel  XScale  core. When written, an
 4400 **                                                             interrupt may be generated on the PCI Interrupt pin determined by the ATU Interrupt Pin Register.
 4401 **************************************************************************
 4402 */
 4403 #define     ARCMSR_MU_OUTBOUND_MESSAGE_REG0                       0x18    /*dword 0x1B,0x1A,0x19,0x18*/
 4404 #define     ARCMSR_MU_OUTBOUND_MESSAGE_REG1                       0x1C    /*dword 0x1F,0x1E,0x1D,0x1C*/
 4405 /*
 4406 **************************************************************************
 4407 **        Doorbell Registers
 4408 **  ==============================
 4409 **  There are two Doorbell Registers: 
 4410 **                                  Inbound Doorbell Register 
 4411 **                                  Outbound Doorbell Register
 4412 **  The Inbound Doorbell Register allows external PCI agents to generate interrupts to the Intel R XScale core. 
 4413 **  The Outbound Doorbell Register allows the Intel R XScale core to generate a PCI interrupt. 
 4414 **  Both Doorbell Registers may generate interrupts whenever a bit in the register is set.
 4415 **
 4416 **  Inbound Doorbells:
 4417 **  ------------------
 4418 **  . When the Inbound Doorbell Register is written by an external PCI agent, an interrupt may be generated to the Intel R XScale  core.
 4419 **    An interrupt is generated when any of the bits in the doorbell register is written to a value of 1.
 4420 **    Writing a value of 0 to any bit does not change the value of that bit and does not cause an interrupt to be generated. 
 4421 **  . Once a bit is set in the Inbound Doorbell Register, it cannot be cleared by any external PCI agent. 
 4422 **    The interrupt is recorded in the Inbound Interrupt Status Register.
 4423 **  . The interrupt may be masked by the Inbound Doorbell Interrupt mask bit in the Inbound Interrupt Mask Register.
 4424 **    When the mask bit is set for a particular bit, no interrupt is generated for that bit.
 4425 **    The Inbound Interrupt Mask Register affects only the generation of the normal messaging unit interrupt
 4426 **    and not the values written to the Inbound Doorbell Register. 
 4427 **    One bit in the Inbound Doorbell Register is reserved for an Error Doorbell interrupt.
 4428 **  . The interrupt is cleared when the Intel R XScale core writes a value of 1 to the bits in the Inbound Doorbell Register that are set. 
 4429 **    Writing a value of 0 to any bit does not change the value of that bit and does not clear the interrupt.
 4430 **  ------------------------------------------------------------------------
 4431 **  Inbound Doorbell Register - IDR
 4432 **
 4433 **  . The Inbound Doorbell Register (IDR) is used to generate interrupts to the Intel XScale core. 
 4434 **  . Bit 31 is reserved for generating an Error Doorbell interrupt. 
 4435 **    When bit 31 is set, an Error interrupt may be generated to the Intel XScale core. 
 4436 **    All other bits, when set, cause the Normal Messaging Unit interrupt line of the Intel XScale core to be asserted, 
 4437 **    when the interrupt is not masked by the Inbound Doorbell Interrupt Mask bit in the Inbound Interrupt Mask Register.
 4438 **    The bits in the IDR register can only be set by an external PCI agent and can only be cleared by the Intel XScale  core.
 4439 **  ------------------------------------------------------------------------
 4440 **  Bit       Default                       Description
 4441 **  31          0 2                         Error Interrupt - Generate an Error Interrupt to the Intel XScale core.
 4442 **  30:00    00000000H                      Normal Interrupt - When any bit is set, generate a Normal interrupt to the Intel XScale core. 
 4443 **                                                             When all bits are clear, do not generate a Normal Interrupt.
 4444 **************************************************************************
 4445 */
 4446 #define     ARCMSR_MU_INBOUND_DOORBELL_REG                        0x20    /*dword 0x23,0x22,0x21,0x20*/
 4447 /*
 4448 **************************************************************************
 4449 **  Inbound Interrupt Status Register - IISR
 4450 **
 4451 **  . The Inbound Interrupt Status Register (IISR) contains hardware interrupt status. 
 4452 **    It records the status of Intel XScale core interrupts generated by the Message Registers, Doorbell Registers, and the Circular Queues. 
 4453 **    All interrupts are routed to the Normal Messaging Unit interrupt input of the Intel XScale core, 
 4454 **    except for the Error Doorbell Interrupt and the Outbound Free Queue Full interrupt; 
 4455 **    these two are routed to the Messaging Unit Error interrupt input. 
 4456 **    The generation of interrupts recorded in the Inbound Interrupt Status Register 
 4457 **    may be masked by setting the corresponding bit in the Inbound Interrupt Mask Register. 
 4458 **    Some of the bits in this register are Read Only. 
 4459 **    For those bits, the interrupt must be cleared through another register.
 4460 **
 4461 **  Bit       Default                       Description
 4462 **  31:07    0000000H 0 2                   Reserved
 4463 **  06          0 2              Index Register Interrupt - This bit is set by the MU hardware 
 4464 **                               when an Index Register has been written after a PCI transaction.
 4465 **  05          0 2              Outbound Free Queue Full Interrupt - This bit is set 
 4466 **                               when the Outbound Free Head Pointer becomes equal to the Tail Pointer and the queue is full. 
 4467 **                               An Error interrupt is generated for this condition.
 4468 **  04          0 2              Inbound Post Queue Interrupt - This bit is set by the MU hardware when the Inbound Post Queue has been written. 
 4469 **                               Once cleared, an interrupt does NOT be generated 
 4470 **                               when the head and tail pointers remain unequal (i.e. queue status is Not Empty).
 4471 **                               Therefore, when software leaves any unprocessed messages in the post queue when the interrupt is cleared, 
 4472 **                               software must retain the information that the Inbound Post queue status is not empty.
 4473 **          NOTE: This interrupt is provided with dedicated support in the 80331 Interrupt Controller.
 4474 **  03          0 2              Error Doorbell Interrupt - This bit is set when the Error Interrupt of the Inbound Doorbell Register is set.
 4475 **                               To clear this bit (and the interrupt), the Error Interrupt bit of the Inbound Doorbell Register must be clear.
 4476 **  02          0 2              Inbound Doorbell Interrupt - This bit is set when at least one 
 4477 **                               Normal Interrupt bit in the Inbound Doorbell Register is set.
 4478 **                               To clear this bit (and the interrupt), the Normal Interrupt bits in the Inbound Doorbell Register must all be clear.
 4479 **  01          0 2              Inbound Message 1 Interrupt - This bit is set by the MU hardware when the Inbound Message 1 Register has been written.
 4480 **  00          0 2              Inbound Message 0 Interrupt - This bit is set by the MU hardware when the Inbound Message 0 Register has been written.
 4481 **************************************************************************
 4482 */
 4483 #define     ARCMSR_MU_INBOUND_INTERRUPT_STATUS_REG            0x24    /*dword 0x27,0x26,0x25,0x24*/
 4484 #define     ARCMSR_MU_INBOUND_INDEX_INT                      0x40
 4485 #define     ARCMSR_MU_INBOUND_QUEUEFULL_INT                  0x20
 4486 #define     ARCMSR_MU_INBOUND_POSTQUEUE_INT                  0x10         
 4487 #define     ARCMSR_MU_INBOUND_ERROR_DOORBELL_INT             0x08
 4488 #define     ARCMSR_MU_INBOUND_DOORBELL_INT                   0x04
 4489 #define     ARCMSR_MU_INBOUND_MESSAGE1_INT                   0x02
 4490 #define     ARCMSR_MU_INBOUND_MESSAGE0_INT                   0x01
 4491 /*
 4492 **************************************************************************
 4493 **  Inbound Interrupt Mask Register - IIMR
 4494 **
 4495 **  . The Inbound Interrupt Mask Register (IIMR) provides the ability to mask Intel XScale core interrupts generated by the Messaging Unit. 
 4496 **    Each bit in the Mask register corresponds to an interrupt bit in the Inbound Interrupt Status Register.
 4497 **    Setting or clearing bits in this register does not affect the Inbound Interrupt Status Register. 
 4498 **    They only affect the generation of the Intel XScale core interrupt.
 4499 **  ------------------------------------------------------------------------
 4500 **  Bit       Default                       Description
 4501 **  31:07     000000H 0 2                   Reserved
 4502 **  06        0 2               Index Register Interrupt Mask - When set, this bit masks the interrupt generated by the MU hardware 
 4503 **                              when an Index Register has been written after a PCI transaction.
 4504 **  05        0 2               Outbound Free Queue Full Interrupt Mask - When set, this bit masks the Error interrupt generated 
 4505 **                              when the Outbound Free Head Pointer becomes equal to the Tail Pointer and the queue is full.
 4506 **  04        0 2               Inbound Post Queue Interrupt Mask - When set, this bit masks the interrupt generated 
 4507 **                              by the MU hardware when the Inbound Post Queue has been written.
 4508 **  03        0 2               Error Doorbell Interrupt Mask - When set, this bit masks the Error Interrupt 
 4509 **                              when the Error Interrupt bit of the Inbound Doorbell Register is set.
 4510 **  02        0 2               Inbound Doorbell Interrupt Mask - When set, this bit masks the interrupt generated 
 4511 **                              when at least one Normal Interrupt bit in the Inbound Doorbell Register is set.
 4512 **  01        0 2               Inbound Message 1 Interrupt Mask - When set, this bit masks the Inbound Message 1 
 4513 **                              Interrupt generated by a write to the Inbound Message 1 Register.
 4514 **  00        0 2               Inbound Message 0 Interrupt Mask - When set, 
 4515 **                              this bit masks the Inbound Message 0 Interrupt generated by a write to the Inbound Message 0 Register.
 4516 **************************************************************************
 4517 */
 4518 #define     ARCMSR_MU_INBOUND_INTERRUPT_MASK_REG              0x28    /*dword 0x2B,0x2A,0x29,0x28*/
 4519 #define     ARCMSR_MU_INBOUND_INDEX_INTMASKENABLE               0x40
 4520 #define     ARCMSR_MU_INBOUND_QUEUEFULL_INTMASKENABLE           0x20
 4521 #define     ARCMSR_MU_INBOUND_POSTQUEUE_INTMASKENABLE           0x10         
 4522 #define     ARCMSR_MU_INBOUND_DOORBELL_ERROR_INTMASKENABLE      0x08
 4523 #define     ARCMSR_MU_INBOUND_DOORBELL_INTMASKENABLE            0x04
 4524 #define     ARCMSR_MU_INBOUND_MESSAGE1_INTMASKENABLE            0x02
 4525 #define     ARCMSR_MU_INBOUND_MESSAGE0_INTMASKENABLE            0x01
 4526 /*
 4527 **************************************************************************
 4528 **  Outbound Doorbell Register - ODR
 4529 **
 4530 **  The Outbound Doorbell Register (ODR) allows software interrupt generation. It allows the Intel 
 4531 **  XScale  core to generate PCI interrupts to the host processor by writing to this register. The
 4532 **  generation of PCI interrupts through the Outbound Doorbell Register may be masked by setting the
 4533 **  Outbound Doorbell Interrupt Mask bit in the Outbound Interrupt Mask Register.
 4534 **  The Software Interrupt bits in this register can only be set by the Intel  XScale  core and can only
 4535 **  be cleared by an external PCI agent.
 4536 **  ----------------------------------------------------------------------
 4537 **  Bit       Default                       Description
 4538 **  31          0 2                          Reserved
 4539 **  30          0 2                          Reserved.
 4540 **  29          0 2                          Reserved
 4541 **  28       0000 0000H                      PCI Interrupt - When set, this bit causes the P_INTC# interrupt output 
 4542 **                                                           (P_INTA# with BRG_EN and ARB_EN straps low)
 4543 **                                                           signal to be asserted or a Message-signaled Interrupt is generated (when enabled). 
 4544 **                                                           When this bit is cleared, the P_INTC# interrupt output 
 4545 **                                                           (P_INTA# with BRG_EN and ARB_EN straps low) 
 4546 **                                                           signal is deasserted.
 4547 **  27:00     000 0000H                      Software Interrupts - When any bit is set the P_INTC# interrupt output 
 4548 **                                           (P_INTA# with BRG_EN and ARB_EN straps low) 
 4549 **                                           signal is asserted or a Message-signaled Interrupt is generated (when enabled).
 4550 **                                           When all bits are cleared, the P_INTC# interrupt output (P_INTA# with BRG_EN and ARB_EN straps low)
 4551 **                                           signal is deasserted.
 4552 **************************************************************************
 4553 */
 4554 #define     ARCMSR_MU_OUTBOUND_DOORBELL_REG                       0x2C    /*dword 0x2F,0x2E,0x2D,0x2C*/
 4555 /*
 4556 **************************************************************************
 4557 **  Outbound Interrupt Status Register - OISR
 4558 **
 4559 **  The Outbound Interrupt Status Register (OISR) contains hardware interrupt status. It records the
 4560 **  status of PCI interrupts generated by the Message Registers, Doorbell Registers, and the Circular
 4561 **  Queues. The generation of PCI interrupts recorded in the Outbound Interrupt Status Register may
 4562 **  be masked by setting the corresponding bit in the Outbound Interrupt Mask Register. Some of the
 4563 **  bits in this register are Read Only. For those bits, the interrupt must be cleared through another
 4564 **  register.
 4565 **  ----------------------------------------------------------------------
 4566 **  Bit       Default                       Description
 4567 **  31:05     000000H 000 2                 Reserved
 4568 **  04        0 2                           PCI Interrupt - This bit is set when the PCI Interrupt bit (bit 28) is set in the Outbound Doorbell Register.
 4569 **                                                          To clear this bit (and the interrupt), the PCI Interrupt bit must be cleared.
 4570 **  03        0 2                           Outbound Post Queue Interrupt - This bit is set when data in the prefetch buffer is valid. This bit is
 4571 **                                                          cleared when any prefetch data has been read from the Outbound Queue Port.
 4572 **  02        0 2                           Outbound Doorbell Interrupt - This bit is set when at least one Software Interrupt bit in the Outbound
 4573 **                                          Doorbell Register is set. To clear this bit (and the interrupt), the Software Interrupt bits in the Outbound
 4574 **                                          Doorbell Register must all be clear.
 4575 **  01        0 2                           Outbound Message 1 Interrupt - This bit is set by the MU when the Outbound Message 1 Register is
 4576 **                                                          written. Clearing this bit clears the interrupt.
 4577 **  00        0 2                           Outbound Message 0 Interrupt - This bit is set by the MU when the Outbound Message 0 Register is
 4578 **                                                          written. Clearing this bit clears the interrupt.
 4579 **************************************************************************
 4580 */
 4581 #define     ARCMSR_MU_OUTBOUND_INTERRUPT_STATUS_REG           0x30    /*dword 0x33,0x32,0x31,0x30*/
 4582 #define     ARCMSR_MU_OUTBOUND_PCI_INT                        0x10
 4583 #define     ARCMSR_MU_OUTBOUND_POSTQUEUE_INT                      0x08 
 4584 #define     ARCMSR_MU_OUTBOUND_DOORBELL_INT                       0x04 
 4585 #define     ARCMSR_MU_OUTBOUND_MESSAGE1_INT                       0x02 
 4586 #define     ARCMSR_MU_OUTBOUND_MESSAGE0_INT                       0x01 
 4587 /*
 4588 **************************************************************************
 4589 **  Outbound Interrupt Mask Register - OIMR
 4590 **  The Outbound Interrupt Mask Register (OIMR) provides the ability to mask outbound PCI
 4591 **  interrupts generated by the Messaging Unit. Each bit in the mask register corresponds to a
 4592 **  hardware interrupt bit in the Outbound Interrupt Status Register. When the bit is set, the PCI
 4593 **  interrupt is not generated. When the bit is clear, the interrupt is allowed to be generated.
 4594 **  Setting or clearing bits in this register does not affect the Outbound Interrupt Status Register. They
 4595 **  only affect the generation of the PCI interrupt.
 4596 **  ----------------------------------------------------------------------
 4597 **  Bit       Default                       Description
 4598 **  31:05     000000H                       Reserved
 4599 **  04          0 2                         PCI Interrupt Mask - When set, this bit masks the interrupt generation when the PCI Interrupt bit (bit 28)
 4600 **                                                               in the Outbound Doorbell Register is set.
 4601 **  03          0 2                         Outbound Post Queue Interrupt Mask - When set, this bit masks the interrupt generated when data in
 4602 **                                                               the prefetch buffer is valid.
 4603 **  02          0 2                         Outbound Doorbell Interrupt Mask - When set, this bit masks the interrupt generated by the Outbound
 4604 **                                                               Doorbell Register.
 4605 **  01          0 2                         Outbound Message 1 Interrupt Mask - When set, this bit masks the Outbound Message 1 Interrupt
 4606 **                                                               generated by a write to the Outbound Message 1 Register.
 4607 **  00          0 2                         Outbound Message 0 Interrupt Mask- When set, this bit masks the Outbound Message 0 Interrupt
 4608 **                                                               generated by a write to the Outbound Message 0 Register.
 4609 **************************************************************************
 4610 */
 4611 #define     ARCMSR_MU_OUTBOUND_INTERRUPT_MASK_REG                 0x34    /*dword 0x37,0x36,0x35,0x34*/
 4612 #define     ARCMSR_MU_OUTBOUND_PCI_INTMASKENABLE                  0x10
 4613 #define     ARCMSR_MU_OUTBOUND_POSTQUEUE_INTMASKENABLE        0x08 
 4614 #define     ARCMSR_MU_OUTBOUND_DOORBELL_INTMASKENABLE             0x04 
 4615 #define     ARCMSR_MU_OUTBOUND_MESSAGE1_INTMASKENABLE             0x02 
 4616 #define     ARCMSR_MU_OUTBOUND_MESSAGE0_INTMASKENABLE             0x01 
 4617 #define     ARCMSR_MU_OUTBOUND_ALL_INTMASKENABLE                      0x1F 
 4618 /*
 4619 **************************************************************************
 4620 **
 4621 **************************************************************************
 4622 */
 4623 #define     ARCMSR_MU_INBOUND_QUEUE_PORT_REG              0x40    /*dword 0x43,0x42,0x41,0x40*/
 4624 #define     ARCMSR_MU_OUTBOUND_QUEUE_PORT_REG             0x44    /*dword 0x47,0x46,0x45,0x44*/
 4625 /*
 4626 **************************************************************************
 4627 **                          Circular Queues
 4628 **  ======================================================================
 4629 **  The MU implements four circular queues. There are 2 inbound queues and 2 outbound queues. In
 4630 **  this case, inbound and outbound refer to the direction of the flow of posted messages.
 4631 **  Inbound messages are either:
 4632 **                                              ˇE posted messages by other processors for the Intel XScale core to process or
 4633 **                                              ˇE free (or empty) messages that can be reused by other processors.
 4634 **  Outbound messages are either:
 4635 **                                                      ˇE posted messages by the Intel XScale core for other processors to process or
 4636 **                                                      ˇE free (or empty) messages that can be reused by the Intel XScale core.
 4637 **  Therefore, free inbound messages flow away from the 80331 and free outbound messages flow toward the 80331.
 4638 **  The four Circular Queues are used to pass messages in the following manner. 
 4639 **      . The two inbound queues are used to handle inbound messages 
 4640 **        and the two outbound queues are used to handle  outbound messages. 
 4641 **      . One of the inbound queues is designated the Free queue and it contains inbound free messages. 
 4642 **        The other inbound queue is designated the Post queue and it contains inbound posted messages.
 4643 **        Similarly, one of the outbound queues is designated the Free queue and the other outbound queue is designated the Post queue. 
 4644 **
 4645 **  =============================================================================================================
 4646 **  Circular Queue Summary
 4647 **   _____________________________________________________________________________________________________________
 4648 **  |    Queue Name        |                     Purpose                                |  Action on PCI Interface|
 4649 **  |______________________|____________________________________________________________|_________________________|
 4650 **  |Inbound Post  Queue   |    Queue for inbound messages from other processors        |          Written        |
 4651 **  |                      |     waiting to be processed by the 80331                   |                         |
 4652 **  |Inbound Free  Queue   |    Queue for empty inbound messages from the 80331         |          Read           |
 4653 **  |                      |    available for use by other processors                   |                         |
 4654 **  |Outbound Post Queue   |    Queue for outbound messages from the 80331              |          Read           |
 4655 **  |                      |    that are being posted to the other processors           |                         |
 4656 **  |Outbound Free Queue   |    Queue for empty outbound messages from other processors |          Written        |
 4657 **  |                      |    available for use by the 80331                          |                         |
 4658 **  |______________________|____________________________________________________________|_________________________|
 4659 **
 4660 **  . The two inbound queues allow the host processor to post inbound messages for the 80331 in one
 4661 **    queue and to receive free messages returning from the 80331. 
 4662 **    The host processor posts inbound messages, 
 4663 **    the Intel XScale core receives the posted message and when it is finished with the message,
 4664 **    places it back on the inbound free queue for reuse by the host processor.
 4665 **
 4666 **  The circular queues are accessed by external PCI agents through two port locations in the PCI
 4667 **  address space: 
 4668 **              Inbound Queue Port 
 4669 **          and Outbound Queue Port. 
 4670 **  The Inbound Queue Port is used by external PCI agents to read the Inbound Free Queue and write the Inbound Post Queue. 
 4671 **  The Outbound Queue Port is used by external PCI agents to read the Outbound Post Queue and write the Outbound Free Queue.
 4672 **  Note that a PCI transaction to the inbound or outbound queue ports with null byte enables (P_C/BE[3:0]#=1111 2 ) 
 4673 **  does not cause the MU hardware to increment the queue pointers. 
 4674 **  This is treated as when the PCI transaction did not occur. 
 4675 **  The Inbound and Outbound Queue Ports never respond with P_ACK64# on the PCI interface.
 4676 **  ======================================================================================
 4677 **  Overview of Circular Queue Operation
 4678 **  ======================================================================================
 4679 **  . The data storage for the circular queues must be provided by the 80331 local memory.
 4680 **  . The base address of the circular queues is contained in the Queue Base Address Register.
 4681 **    Each entry in the queue is a 32-bit data value. 
 4682 **  . Each read from or write to the queue may access only one queue entry. 
 4683 **  . Multi-DWORD accesses to the circular queues are not allowed. 
 4684 **    Sub-DWORD accesses are promoted to DWORD accesses.
 4685 **  . Each circular queue has a head pointer and a tail pointer. 
 4686 **    The pointers are offsets from the Queue Base Address.
 4687 **  . Writes to a queue occur at the head of the queue and reads occur from the tail. 
 4688 **    The head and tail pointers are incremented by either the Intel XScale core or the Messaging Unit hardware.
 4689 **    Which unit maintains the pointer is determined by the writer of the queue. 
 4690 **    More details about the pointers are given in the queue descriptions below. 
 4691 **    The pointers are incremented after the queue access.
 4692 **    Both pointers wrap around to the first address of the circular queue when they reach the circular queue size.
 4693 **
 4694 **  Messaging Unit...
 4695 **
 4696 **  The Messaging Unit generates an interrupt to the Intel XScale core or generate a PCI interrupt under certain conditions.
 4697 **  . In general, when a Post queue is written, an interrupt is generated to notify the receiver that a message was posted.
 4698 **    The size of each circular queue can range from 4K entries (16 Kbytes) to 64K entries (256 Kbytes).
 4699 **  . All four queues must be the same size and may be contiguous. 
 4700 **    Therefore, the total amount of local memory needed by the circular queues ranges from 64 Kbytes to 1 Mbytes. 
 4701 **    The Queue size is determined by the Queue Size field in the MU Configuration Register.
 4702 **  . There is one base address for all four queues. 
 4703 **    It is stored in the Queue Base Address Register (QBAR).
 4704 **    The starting addresses of each queue is based on the Queue Base Address and the Queue Size field. 
 4705 **    here shows an example of how the circular queues should be set up based on the
 4706 **    Intelligent I/O (I 2 O) Architecture Specification. 
 4707 **    Other ordering of the circular queues is possible.
 4708 **
 4709 **                              Queue                           Starting Address
 4710 **                              Inbound Free Queue              QBAR
 4711 **                              Inbound Post Queue              QBAR + Queue Size
 4712 **                              Outbound Post Queue             QBAR + 2 * Queue Size
 4713 **                              Outbound Free Queue             QBAR + 3 * Queue Size
 4714 **  ===================================================================================
 4715 **  Inbound Post Queue
 4716 **  ------------------
 4717 **  The Inbound Post Queue holds posted messages placed there by other processors for the Intel XScale core to process.
 4718 **  This queue is read from the queue tail by the Intel XScale core. It is written to the queue head by external PCI agents. 
 4719 **  The tail pointer is maintained by the Intel XScale core. The head pointer is maintained by the MU hardware.
 4720 **  For a PCI write transaction that accesses the Inbound Queue Port, 
 4721 **  the MU writes the data to the local memory location address in the Inbound Post Head Pointer Register.
 4722 **  When the data written to the Inbound Queue Port is written to local memory, the MU hardware increments the Inbound Post Head Pointer Register.
 4723 **  An Intel XScale core interrupt may be generated when the Inbound Post Queue is written. 
 4724 **  The Inbound Post Queue Interrupt bit in the Inbound Interrupt Status Register indicates the interrupt status.
 4725 **  The interrupt is cleared when the Inbound Post Queue Interrupt bit is cleared. 
 4726 **  The interrupt can be masked by the Inbound Interrupt Mask Register. 
 4727 **  Software must be aware of the state of the Inbound Post Queue Interrupt Mask bit to guarantee 
 4728 **  that the full condition is recognized by the core processor.
 4729 **  In addition, to guarantee that the queue does not get overwritten, 
 4730 **  software must process messages from the tail of the queue before incrementing the tail pointer and clearing this interrupt.
 4731 **  Once cleared, an interrupt is NOT generated when the head and tail pointers remain unequal (i.e. queue status is Not Empty). 
 4732 **  Only a new message posting the in the inbound queue generates a new interrupt. 
 4733 **  Therefore, when software leaves any unprocessed messages in the post queue when the interrupt is cleared, 
 4734 **  software must retain the information that the Inbound Post queue status.
 4735 **  From the time that the PCI write transaction is received until the data is written 
 4736 **  in local memory and the Inbound Post Head Pointer Register is incremented, 
 4737 **  any PCI transaction that attempts to access the Inbound Post Queue Port is signalled a Retry.
 4738 **  The Intel XScale core may read messages from the Inbound Post Queue 
 4739 **  by reading the data from the local memory location pointed to by the Inbound Post Tail Pointer Register. 
 4740 **  The Intel XScale core must then increment the Inbound Post Tail Pointer Register. 
 4741 **  When the Inbound Post Queue is full (head and tail pointers are equal and the head pointer was last updated by hardware), 
 4742 **  the hardware retries any PCI writes until a slot in the queue becomes available. 
 4743 **  A slot in the post queue becomes available by the Intel XScale core incrementing the tail pointer.
 4744 **  ===================================================================================
 4745 **  Inbound Free Queue
 4746 **  ------------------
 4747 **  The Inbound Free Queue holds free inbound messages placed there by the Intel XScale core for other processors to use.
 4748 **  This queue is read from the queue tail by external PCI agents. 
 4749 **  It is written to the queue head by the Intel XScale core. 
 4750 **  The tail pointer is maintained by the MU hardware.
 4751 **  The head pointer is maintained by the Intel XScale core.
 4752 **  For a PCI read transaction that accesses the Inbound Queue Port,
 4753 **  the MU attempts to read the data at the local memory address in the Inbound Free Tail Pointer. 
 4754 **  When the queue is not empty (head and tail pointers are not equal) 
 4755 **  or full (head and tail pointers are equal but the head pointer was last written by software), the data is returned.
 4756 **  When the queue is empty (head and tail pointers are equal and the head pointer was last updated by hardware), 
 4757 **  the value of -1 (FFFF.FFFFH) is  returned.
 4758 **  When the queue was not empty and the MU succeeded in returning the data at the tail, 
 4759 **  the MU hardware must increment the value in the Inbound Free Tail Pointer Register.
 4760 **  To reduce latency for the PCI read access, the MU implements a prefetch mechanism to anticipate accesses to the Inbound Free Queue. 
 4761 **  The MU hardware prefetches the data at the tail of the Inbound Free Queue and load it into an internal prefetch register. 
 4762 **  When the PCI read access occurs, the data is read directly from the prefetch register.
 4763 **  The prefetch mechanism loads a value of -1 (FFFF.FFFFH) into the prefetch register 
 4764 **  when the head and tail pointers are equal and the queue is empty. 
 4765 **  In order to update the prefetch register when messages are added to the queue and it becomes non-empty, 
 4766 **  the prefetch mechanism automatically starts a prefetch when the prefetch register contains FFFF.FFFFH 
 4767 **  and the Inbound Free Head Pointer Register is written.
 4768 **  The Intel XScale core needs to update the Inbound Free Head Pointer Register when it adds messages to the queue.
 4769 **  A prefetch must appear atomic from the perspective of the external PCI agent.
 4770 **  When a prefetch is started, any PCI transaction that attempts to access the Inbound Free Queue is signalled a Retry until the prefetch is completed.
 4771 **  The Intel XScale core may place messages in the Inbound Free Queue by writing the data to the
 4772 **  local memory location pointed to by the Inbound Free Head Pointer Register. 
 4773 **  The processor must then increment the Inbound Free Head Pointer Register.
 4774 **  ==================================================================================
 4775 **  Outbound Post Queue
 4776 **  -------------------
 4777 **  The Outbound Post Queue holds outbound posted messages placed there by the Intel XScale 
 4778 **  core for other processors to process. This queue is read from the queue tail by external PCI agents.
 4779 **  It is written to the queue head by the Intel XScale  core. The tail pointer is maintained by the
 4780 **  MU hardware. The head pointer is maintained by the Intel XScale  core.
 4781 **  For a PCI read transaction that accesses the Outbound Queue Port, the MU attempts to read the
 4782 **  data at the local memory address in the Outbound Post Tail Pointer Register. When the queue is not
 4783 **  empty (head and tail pointers are not equal) or full (head and tail pointers are equal but the head
 4784 **  pointer was last written by software), the data is returned. When the queue is empty (head and tail
 4785 **  pointers are equal and the head pointer was last updated by hardware), the value of -1
 4786 **  (FFFF.FFFFH) is returned. When the queue was not empty and the MU succeeded in returning the
 4787 **  data at the tail, the MU hardware must increment the value in the Outbound Post Tail Pointer
 4788 **  Register.
 4789 **  To reduce latency for the PCI read access, the MU implements a prefetch mechanism to anticipate
 4790 **  accesses to the Outbound Post Queue. The MU hardware prefetches the data at the tail of the
 4791 **  Outbound Post Queue and load it into an internal prefetch register. When the PCI read access
 4792 **  occurs, the data is read directly from the prefetch register.
 4793 **  The prefetch mechanism loads a value of -1 (FFFF.FFFFH) into the prefetch register when the head
 4794 **  and tail pointers are equal and the queue is empty. In order to update the prefetch register when
 4795 **  messages are added to the queue and it becomes non-empty, the prefetch mechanism automatically
 4796 **  starts a prefetch when the prefetch register contains FFFF.FFFFH and the Outbound Post Head
 4797 **  Pointer Register is written. The Intel XScale  core needs to update the Outbound Post Head
 4798 **  Pointer Register when it adds messages to the queue.
 4799 **  A prefetch must appear atomic from the perspective of the external PCI agent. When a prefetch is
 4800 **  started, any PCI transaction that attempts to access the Outbound Post Queue is signalled a Retry
 4801 **  until the prefetch is completed.
 4802 **  A PCI interrupt may be generated when data in the prefetch buffer is valid. When the prefetch
 4803 **  queue is clear, no interrupt is generated. The Outbound Post Queue Interrupt bit in the Outbound
 4804 **  Interrupt Status Register shall indicate the status of the prefetch buffer data and therefore the
 4805 **  interrupt status. The interrupt is cleared when any prefetched data has been read from the Outbound
 4806 **  Queue Port. The interrupt can be masked by the Outbound Interrupt Mask Register.
 4807 **  The Intel XScale  core may place messages in the Outbound Post Queue by writing the data to
 4808 **  the local memory address in the Outbound Post Head Pointer Register. The processor must then
 4809 **  increment the Outbound Post Head Pointer Register.
 4810 **  ==================================================
 4811 **  Outbound Free Queue
 4812 **  -----------------------
 4813 **  The Outbound Free Queue holds free messages placed there by other processors for the Intel
 4814 **  XScale  core to use. This queue is read from the queue tail by the Intel XScale  core. It is
 4815 **  written to the queue head by external PCI agents. The tail pointer is maintained by the Intel
 4816 **  XScale  core. The head pointer is maintained by the MU hardware.
 4817 **  For a PCI write transaction that accesses the Outbound Queue Port, the MU writes the data to the
 4818 **  local memory address in the Outbound Free Head Pointer Register. When the data written to the
 4819 **  Outbound Queue Port is written to local memory, the MU hardware increments the Outbound Free
 4820 **  Head Pointer Register.
 4821 **  When the head pointer and the tail pointer become equal and the queue is full, the MU may signal
 4822 **  an interrupt to the Intel XScale  core to register the queue full condition. This interrupt is
 4823 **  recorded in the Inbound Interrupt Status Register. The interrupt is cleared when the Outbound Free
 4824 **  Queue Full Interrupt bit is cleared and not by writing to the head or tail pointers. The interrupt can
 4825 **  be masked by the Inbound Interrupt Mask Register. Software must be aware of the state of the
 4826 **  Outbound Free Queue Interrupt Mask bit to guarantee that the full condition is recognized by the
 4827 **  core processor.
 4828 **  From the time that a PCI write transaction is received until the data is written in local memory and
 4829 **  the Outbound Free Head Pointer Register is incremented, any PCI transaction that attempts to
 4830 **  access the Outbound Free Queue Port is signalled a retry.
 4831 **  The Intel XScale  core may read messages from the Outbound Free Queue by reading the data
 4832 **  from the local memory address in the Outbound Free Tail Pointer Register. The processor must
 4833 **  then increment the Outbound Free Tail Pointer Register. When the Outbound Free Queue is full,
 4834 **  the hardware must retry any PCI writes until a slot in the queue becomes available.
 4835 **
 4836 **  ==================================================================================
 4837 **  Circular Queue Summary
 4838 **  ----------------------
 4839 **  ________________________________________________________________________________________________________________________________________________
 4840 ** | Queue Name  |  PCI Port     |Generate PCI Interrupt |Generate Intel Xscale Core Interrupt|Head Pointer maintained by|Tail Pointer maintained by|
 4841 ** |_____________|_______________|_______________________|____________________________________|__________________________|__________________________|
 4842 ** |Inbound Post | Inbound Queue |                       |                                    |                          |                          |
 4843 ** |    Queue    |     Port      |          NO           |      Yes, when queue is written    |         MU hardware      |     Intel XScale         |
 4844 ** |_____________|_______________|_______________________|____________________________________|__________________________|__________________________|
 4845 ** |Inbound Free | Inbound Queue |                       |                                    |                          |                          |
 4846 ** |    Queue    |     Port      |          NO           |      NO                            |        Intel XScale      |      MU hardware         |
 4847 ** |_____________|_______________|_______________________|____________________________________|__________________________|__________________________|
 4848 ** ==================================================================================
 4849 **  Circular Queue Status Summary
 4850 **  ----------------------
 4851 **  ____________________________________________________________________________________________________
 4852 ** |     Queue Name      |  Queue Status  | Head & Tail Pointer |         Last Pointer Update           |
 4853 ** |_____________________|________________|_____________________|_______________________________________|
 4854 ** | Inbound Post Queue  |      Empty     |       Equal         | Tail pointer last updated by software |
 4855 ** |_____________________|________________|_____________________|_______________________________________|
 4856 ** | Inbound Free Queue  |      Empty     |       Equal         | Head pointer last updated by hardware |
 4857 ** |_____________________|________________|_____________________|_______________________________________|
 4858 **************************************************************************
 4859 */
 4860 
 4861 /*
 4862 **************************************************************************
 4863 **       Index Registers
 4864 **  ========================
 4865 **  . The Index Registers are a set of 1004 registers that when written by an external PCI agent can generate an interrupt to the Intel XScale core. 
 4866 **    These registers are for inbound messages only.
 4867 **    The interrupt is recorded in the Inbound Interrupt Status Register.
 4868 **    The storage for the Index Registers is allocated from the 80331 local memory. 
 4869 **    PCI write accesses to the Index Registers write the data to local memory. 
 4870 **    PCI read accesses to the Index Registers read the data from local memory. 
 4871 **  . The local memory used for the Index Registers ranges from Inbound ATU Translate Value Register + 050H 
 4872 **                                                           to Inbound ATU Translate Value Register + FFFH.
 4873 **  . The address of the first write access is stored in the Index Address Register. 
 4874 **    This register is written during the earliest write access and provides a means to determine which Index Register was written. 
 4875 **    Once updated by the MU, the Index Address Register is not updated until the Index Register 
 4876 **    Interrupt bit in the Inbound Interrupt Status Register is cleared. 
 4877 **  . When the interrupt is cleared, the Index Address Register is re-enabled and stores the address of the next Index Register write access.
 4878 **    Writes by the Intel XScale core to the local memory used by the Index Registers 
 4879 **    does not cause an interrupt and does not update the Index Address Register.
 4880 **  . The index registers can be accessed with Multi-DWORD reads and single QWORD aligned writes.
 4881 **************************************************************************
 4882 */
 4883 /*
 4884 **************************************************************************
 4885 **    Messaging Unit Internal Bus Memory Map
 4886 **  =======================================
 4887 **  Internal Bus Address___Register Description (Name)____________________|_PCI Configuration Space Register Number_
 4888 **  FFFF E300H             reserved                                       |
 4889 **    ..                     ..                                           |
 4890 **  FFFF E30CH             reserved                                       |
 4891 **  FFFF E310H             Inbound Message Register 0                     | Available through
 4892 **  FFFF E314H             Inbound Message Register 1                     | ATU Inbound Translation Window
 4893 **  FFFF E318H             Outbound Message Register 0                    |
 4894 **  FFFF E31CH             Outbound Message Register 1                    | or
 4895 **  FFFF E320H             Inbound Doorbell Register                      |
 4896 **  FFFF E324H             Inbound Interrupt Status Register              | must translate PCI address to
 4897 **  FFFF E328H             Inbound Interrupt Mask Register                | the Intel Xscale Core
 4898 **  FFFF E32CH             Outbound Doorbell Register                     | Memory-Mapped Address
 4899 **  FFFF E330H             Outbound Interrupt Status Register             |
 4900 **  FFFF E334H             Outbound Interrupt Mask Register               |
 4901 **  ______________________________________________________________________|________________________________________
 4902 **  FFFF E338H             reserved                                       |
 4903 **  FFFF E33CH             reserved                                       |
 4904 **  FFFF E340H             reserved                                       |
 4905 **  FFFF E344H             reserved                                       |
 4906 **  FFFF E348H             reserved                                       |
 4907 **  FFFF E34CH             reserved                                       |
 4908 **  FFFF E350H             MU Configuration Register                      |
 4909 **  FFFF E354H             Queue Base Address Register                    |
 4910 **  FFFF E358H             reserved                                       |
 4911 **  FFFF E35CH             reserved                                       | must translate PCI address to
 4912 **  FFFF E360H             Inbound Free Head Pointer Register             | the Intel Xscale Core
 4913 **  FFFF E364H             Inbound Free Tail Pointer Register             | Memory-Mapped Address
 4914 **  FFFF E368H             Inbound Post Head pointer Register             |
 4915 **  FFFF E36CH             Inbound Post Tail Pointer Register             |
 4916 **  FFFF E370H             Outbound Free Head Pointer Register            |
 4917 **  FFFF E374H             Outbound Free Tail Pointer Register            |
 4918 **  FFFF E378H             Outbound Post Head pointer Register            |
 4919 **  FFFF E37CH             Outbound Post Tail Pointer Register            |
 4920 **  FFFF E380H             Index Address Register                         |
 4921 **  FFFF E384H             reserved                                       |
 4922 **   ..                       ..                                          |
 4923 **  FFFF E3FCH             reserved                                       |
 4924 **  ______________________________________________________________________|_______________________________________
 4925 **************************************************************************
 4926 */
 4927 /*
 4928 **************************************************************************
 4929 **  MU Configuration Register - MUCR  FFFF.E350H
 4930 **
 4931 **  . The MU Configuration Register (MUCR) contains the Circular Queue Enable bit and the size of one Circular Queue.
 4932 **  . The Circular Queue Enable bit enables or disables the Circular Queues. 
 4933 **    The Circular Queues are disabled at reset to allow the software to initialize the head 
 4934 **    and tail pointer registers before any PCI accesses to the Queue Ports. 
 4935 **  . Each Circular Queue may range from 4 K entries (16 Kbytes) to 64 K entries (256 Kbytes) and there are four Circular Queues.
 4936 **  ------------------------------------------------------------------------
 4937 **  Bit       Default                       Description
 4938 **  31:06     000000H 00 2                  Reserved
 4939 **  05:01     00001 2                       Circular Queue Size - This field determines the size of each Circular Queue. 
 4940 **                                      All four queues are the same size.
 4941 **                                      ˇE 00001 2 - 4K Entries (16 Kbytes)
 4942 **                                      ˇE 00010 2 - 8K Entries (32 Kbytes)
 4943 **                                      ˇE 00100 2 - 16K Entries (64 Kbytes)
 4944 **                                      ˇE 01000 2 - 32K Entries (128 Kbytes)
 4945 **                                      ˇE 10000 2 - 64K Entries (256 Kbytes)
 4946 **  00        0 2                       Circular Queue Enable - This bit enables or disables the Circular Queues. When clear the Circular
 4947 **                                      Queues are disabled, however the MU accepts PCI accesses to the Circular Queue Ports but ignores
 4948 **                                      the data for Writes and return FFFF.FFFFH for Reads. Interrupts are not generated to the core when
 4949 **                                      disabled. When set, the Circular Queues are fully enabled.
 4950 **************************************************************************
 4951 */
 4952 #define     ARCMSR_MU_CONFIGURATION_REG                   0xFFFFE350        
 4953 #define     ARCMSR_MU_CIRCULAR_QUEUE_SIZE64K              0x0020    
 4954 #define     ARCMSR_MU_CIRCULAR_QUEUE_SIZE32K              0x0010
 4955 #define     ARCMSR_MU_CIRCULAR_QUEUE_SIZE16K              0x0008   
 4956 #define     ARCMSR_MU_CIRCULAR_QUEUE_SIZE8K               0x0004   
 4957 #define     ARCMSR_MU_CIRCULAR_QUEUE_SIZE4K               0x0002    
 4958 #define     ARCMSR_MU_CIRCULAR_QUEUE_ENABLE               0x0001        /*0:disable 1:enable*/
 4959 /*
 4960 **************************************************************************
 4961 **  Queue Base Address Register - QBAR
 4962 **
 4963 **  . The Queue Base Address Register (QBAR) contains the local memory address of the Circular Queues.
 4964 **    The base address is required to be located on a 1 Mbyte address boundary.
 4965 **  . All Circular Queue head and tail pointers are based on the QBAR. 
 4966 **    When the head and tail pointer registers are read, the Queue Base Address is returned in the upper 12 bits. 
 4967 **    Writing to the upper 12 bits of the head and tail pointer registers does not affect the Queue Base Address or Queue Base Address Register.
 4968 **  Warning: 
 4969 **         The QBAR must designate a range allocated to the 80331 DDR SDRAM interface 
 4970 **  ------------------------------------------------------------------------
 4971 **  Bit       Default                       Description
 4972 **  31:20     000H                          Queue Base Address - Local memory address of the circular queues.
 4973 **  19:00     00000H                        Reserved
 4974 **************************************************************************
 4975 */
 4976 #define     ARCMSR_MU_QUEUE_BASE_ADDRESS_REG          0xFFFFE354   
 4977 /*
 4978 **************************************************************************
 4979 **  Inbound Free Head Pointer Register - IFHPR
 4980 **
 4981 **  . The Inbound Free Head Pointer Register (IFHPR) contains the local memory offset from 
 4982 **    the Queue Base Address of the head pointer for the Inbound Free Queue. 
 4983 **    The Head Pointer must be aligned on a DWORD address boundary.
 4984 **    When read, the Queue Base Address is provided in the upper 12 bits of the register. 
 4985 **    Writes to the upper 12 bits of the register are ignored. 
 4986 **    This register is maintained by software.
 4987 **  ------------------------------------------------------------------------
 4988 **  Bit       Default                       Description
 4989 **  31:20     000H                          Queue Base Address - Local memory address of the circular queues.
 4990 **  19:02     0000H 00 2                    Inbound Free Head Pointer - Local memory offset of the head pointer for the Inbound Free Queue.
 4991 **  01:00     00 2                          Reserved
 4992 **************************************************************************
 4993 */
 4994 #define     ARCMSR_MU_INBOUND_FREE_HEAD_PTR_REG       0xFFFFE360   
 4995 /*
 4996 **************************************************************************
 4997 **  Inbound Free Tail Pointer Register - IFTPR
 4998 **
 4999 **  . The Inbound Free Tail Pointer Register (IFTPR) contains the local memory offset from the Queue
 5000 **    Base Address of the tail pointer for the Inbound Free Queue. The Tail Pointer must be aligned on a
 5001 **    DWORD address boundary. When read, the Queue Base Address is provided in the upper 12 bits
 5002 **    of the register. Writes to the upper 12 bits of the register are ignored.
 5003 **  ------------------------------------------------------------------------
 5004 **  Bit       Default                       Description
 5005 **  31:20     000H                          Queue Base Address - Local memory address of the circular queues.
 5006 **  19:02     0000H 00 2                    Inbound Free Tail Pointer - Local memory offset of the tail pointer for the Inbound Free Queue.
 5007 **  01:00     00 2                          Reserved
 5008 **************************************************************************
 5009 */
 5010 #define     ARCMSR_MU_INBOUND_FREE_TAIL_PTR_REG       0xFFFFE364  
 5011 /*
 5012 **************************************************************************
 5013 **  Inbound Post Head Pointer Register - IPHPR
 5014 **
 5015 **  . The Inbound Post Head Pointer Register (IPHPR) contains the local memory offset from the Queue
 5016 **    Base Address of the head pointer for the Inbound Post Queue. The Head Pointer must be aligned on
 5017 **    a DWORD address boundary. When read, the Queue Base Address is provided in the upper 12 bits
 5018 **    of the register. Writes to the upper 12 bits of the register are ignored.
 5019 **  ------------------------------------------------------------------------
 5020 **  Bit       Default                       Description
 5021 **  31:20     000H                          Queue Base Address - Local memory address of the circular queues.
 5022 **  19:02     0000H 00 2                    Inbound Post Head Pointer - Local memory offset of the head pointer for the Inbound Post Queue.
 5023 **  01:00     00 2                          Reserved
 5024 **************************************************************************
 5025 */
 5026 #define     ARCMSR_MU_INBOUND_POST_HEAD_PTR_REG       0xFFFFE368
 5027 /*
 5028 **************************************************************************
 5029 **  Inbound Post Tail Pointer Register - IPTPR
 5030 **
 5031 **  . The Inbound Post Tail Pointer Register (IPTPR) contains the local memory offset from the Queue
 5032 **    Base Address of the tail pointer for the Inbound Post Queue. The Tail Pointer must be aligned on a
 5033 **    DWORD address boundary. When read, the Queue Base Address is provided in the upper 12 bits
 5034 **    of the register. Writes to the upper 12 bits of the register are ignored.
 5035 **  ------------------------------------------------------------------------
 5036 **  Bit       Default                       Description
 5037 **  31:20     000H                          Queue Base Address - Local memory address of the circular queues.
 5038 **  19:02     0000H 00 2                    Inbound Post Tail Pointer - Local memory offset of the tail pointer for the Inbound Post Queue.
 5039 **  01:00     00 2                          Reserved
 5040 **************************************************************************
 5041 */
 5042 #define     ARCMSR_MU_INBOUND_POST_TAIL_PTR_REG       0xFFFFE36C
 5043 /*
 5044 **************************************************************************
 5045 **  Index Address Register - IAR
 5046 **
 5047 **  . The Index Address Register (IAR) contains the offset of the least recently accessed Index Register.
 5048 **    It is written by the MU when the Index Registers are written by a PCI agent.
 5049 **    The register is not updated until the Index Interrupt bit in the Inbound Interrupt Status Register is cleared.
 5050 **  . The local memory address of the Index Register least recently accessed is computed 
 5051 **    by adding the Index Address Register to the Inbound ATU Translate Value Register.
 5052 **  ------------------------------------------------------------------------
 5053 **  Bit       Default                       Description
 5054 **  31:12     000000H                       Reserved
 5055 **  11:02     00H 00 2                      Index Address - is the local memory offset of the Index Register written (050H to FFCH)
 5056 **  01:00     00 2                          Reserved
 5057 **************************************************************************
 5058 */
 5059 #define     ARCMSR_MU_LOCAL_MEMORY_INDEX_REG          0xFFFFE380    /*1004 dwords 0x0050....0x0FFC, 4016 bytes 0x0050...0x0FFF*/
 5060 /*
 5061 **********************************************************************************************************
 5062 **                                RS-232 Interface for Areca Raid Controller
 5063 **                    The low level command interface is exclusive with VT100 terminal
 5064 **  --------------------------------------------------------------------
 5065 **    1. Sequence of command execution
 5066 **  --------------------------------------------------------------------
 5067 **      (A) Header : 3 bytes sequence (0x5E, 0x01, 0x61)
 5068 **      (B) Command block : variable length of data including length, command code, data and checksum byte
 5069 **      (C) Return data : variable length of data
 5070 **  --------------------------------------------------------------------  
 5071 **    2. Command block
 5072 **  --------------------------------------------------------------------
 5073 **      (A) 1st byte : command block length (low byte)
 5074 **      (B) 2nd byte : command block length (high byte)
 5075 **                note ..command block length shouldn't > 2040 bytes, length excludes these two bytes
 5076 **      (C) 3rd byte : command code
 5077 **      (D) 4th and following bytes : variable length data bytes depends on command code
 5078 **      (E) last byte : checksum byte (sum of 1st byte until last data byte)
 5079 **  --------------------------------------------------------------------  
 5080 **    3. Command code and associated data
 5081 **  --------------------------------------------------------------------
 5082 **      The following are command code defined in raid controller Command code 0x10--0x1? are used for system level management,
 5083 **      no password checking is needed and should be implemented in separate well controlled utility and not for end user access.
 5084 **      Command code 0x20--0x?? always check the password, password must be entered to enable these command.
 5085 **      enum
 5086 **      {
 5087 **              GUI_SET_SERIAL=0x10,
 5088 **              GUI_SET_VENDOR,
 5089 **              GUI_SET_MODEL,
 5090 **              GUI_IDENTIFY,
 5091 **              GUI_CHECK_PASSWORD,
 5092 **              GUI_LOGOUT,
 5093 **              GUI_HTTP,
 5094 **              GUI_SET_ETHERNET_ADDR,
 5095 **              GUI_SET_LOGO,
 5096 **              GUI_POLL_EVENT,
 5097 **              GUI_GET_EVENT,
 5098 **              GUI_GET_HW_MONITOR,
 5099 **
 5100 **              //    GUI_QUICK_CREATE=0x20, (function removed)
 5101 **              GUI_GET_INFO_R=0x20,
 5102 **              GUI_GET_INFO_V,
 5103 **              GUI_GET_INFO_P,
 5104 **              GUI_GET_INFO_S,
 5105 **              GUI_CLEAR_EVENT,
 5106 **
 5107 **              GUI_MUTE_BEEPER=0x30,
 5108 **              GUI_BEEPER_SETTING,
 5109 **              GUI_SET_PASSWORD,
 5110 **              GUI_HOST_INTERFACE_MODE,
 5111 **              GUI_REBUILD_PRIORITY,
 5112 **              GUI_MAX_ATA_MODE,
 5113 **              GUI_RESET_CONTROLLER,
 5114 **              GUI_COM_PORT_SETTING,
 5115 **              GUI_NO_OPERATION,
 5116 **              GUI_DHCP_IP,
 5117 **
 5118 **              GUI_CREATE_PASS_THROUGH=0x40,
 5119 **              GUI_MODIFY_PASS_THROUGH,
 5120 **              GUI_DELETE_PASS_THROUGH,
 5121 **              GUI_IDENTIFY_DEVICE,
 5122 **
 5123 **              GUI_CREATE_RAIDSET=0x50,
 5124 **              GUI_DELETE_RAIDSET,
 5125 **              GUI_EXPAND_RAIDSET,
 5126 **              GUI_ACTIVATE_RAIDSET,
 5127 **              GUI_CREATE_HOT_SPARE,
 5128 **              GUI_DELETE_HOT_SPARE,
 5129 **
 5130 **              GUI_CREATE_VOLUME=0x60,
 5131 **              GUI_MODIFY_VOLUME,
 5132 **              GUI_DELETE_VOLUME,
 5133 **              GUI_START_CHECK_VOLUME,
 5134 **              GUI_STOP_CHECK_VOLUME
 5135 **      };
 5136 **
 5137 **    Command description :
 5138 **
 5139 **      GUI_SET_SERIAL : Set the controller serial#
 5140 **              byte 0,1        : length
 5141 **              byte 2          : command code 0x10
 5142 **              byte 3          : password length (should be 0x0f)
 5143 **              byte 4-0x13     : should be "ArEcATecHnoLogY"
 5144 **              byte 0x14--0x23 : Serial number string (must be 16 bytes)
 5145 **      GUI_SET_VENDOR : Set vendor string for the controller
 5146 **              byte 0,1        : length
 5147 **              byte 2          : command code 0x11
 5148 **              byte 3          : password length (should be 0x08)
 5149 **              byte 4-0x13     : should be "ArEcAvAr"
 5150 **              byte 0x14--0x3B : vendor string (must be 40 bytes)
 5151 **      GUI_SET_MODEL : Set the model name of the controller
 5152 **              byte 0,1        : length
 5153 **              byte 2          : command code 0x12
 5154 **              byte 3          : password length (should be 0x08)
 5155 **              byte 4-0x13     : should be "ArEcAvAr"
 5156 **              byte 0x14--0x1B : model string (must be 8 bytes)
 5157 **      GUI_IDENTIFY : Identify device
 5158 **              byte 0,1        : length
 5159 **              byte 2          : command code 0x13
 5160 **                                return "Areca RAID Subsystem "
 5161 **      GUI_CHECK_PASSWORD : Verify password
 5162 **              byte 0,1        : length
 5163 **              byte 2          : command code 0x14
 5164 **              byte 3          : password length
 5165 **              byte 4-0x??     : user password to be checked
 5166 **      GUI_LOGOUT : Logout GUI (force password checking on next command)
 5167 **              byte 0,1        : length
 5168 **              byte 2          : command code 0x15
 5169 **      GUI_HTTP : HTTP interface (reserved for Http proxy service)(0x16)
 5170 **
 5171 **      GUI_SET_ETHERNET_ADDR : Set the ethernet MAC address
 5172 **              byte 0,1        : length
 5173 **              byte 2          : command code 0x17
 5174 **              byte 3          : password length (should be 0x08)
 5175 **              byte 4-0x13     : should be "ArEcAvAr"
 5176 **              byte 0x14--0x19 : Ethernet MAC address (must be 6 bytes)
 5177 **      GUI_SET_LOGO : Set logo in HTTP
 5178 **              byte 0,1        : length
 5179 **              byte 2          : command code 0x18
 5180 **              byte 3          : Page# (0/1/2/3) (0xff --> clear OEM logo)
 5181 **              byte 4/5/6/7    : 0x55/0xaa/0xa5/0x5a
 5182 **              byte 8          : TITLE.JPG data (each page must be 2000 bytes)
 5183 **                                note .... page0 1st 2 byte must be actual length of the JPG file
 5184 **      GUI_POLL_EVENT : Poll If Event Log Changed
 5185 **              byte 0,1        : length
 5186 **              byte 2          : command code 0x19
 5187 **      GUI_GET_EVENT : Read Event
 5188 **              byte 0,1        : length
 5189 **              byte 2          : command code 0x1a
 5190 **              byte 3          : Event Page (0:1st page/1/2/3:last page)
 5191 **      GUI_GET_HW_MONITOR : Get HW monitor data
 5192 **              byte 0,1        : length
 5193 **              byte 2                  : command code 0x1b
 5194 **              byte 3                  : # of FANs(example 2)
 5195 **              byte 4                  : # of Voltage sensor(example 3)
 5196 **              byte 5                  : # of temperature sensor(example 2)
 5197 **              byte 6                  : # of power
 5198 **              byte 7/8        : Fan#0 (RPM)
 5199 **              byte 9/10       : Fan#1
 5200 **              byte 11/12              : Voltage#0 original value in *1000
 5201 **              byte 13/14              : Voltage#0 value
 5202 **              byte 15/16              : Voltage#1 org
 5203 **              byte 17/18              : Voltage#1
 5204 **              byte 19/20              : Voltage#2 org
 5205 **              byte 21/22              : Voltage#2
 5206 **              byte 23                 : Temp#0
 5207 **              byte 24                 : Temp#1
 5208 **              byte 25                 : Power indicator (bit0 : power#0, bit1 : power#1)
 5209 **              byte 26                 : UPS indicator
 5210 **      GUI_QUICK_CREATE : Quick create raid/volume set
 5211 **          byte 0,1        : length
 5212 **          byte 2          : command code 0x20
 5213 **          byte 3/4/5/6    : raw capacity
 5214 **          byte 7                      : raid level
 5215 **          byte 8                      : stripe size
 5216 **          byte 9                      : spare
 5217 **          byte 10/11/12/13: device mask (the devices to create raid/volume) 
 5218 **                                This function is removed, application like to implement quick create function 
 5219 **                                need to use GUI_CREATE_RAIDSET and GUI_CREATE_VOLUMESET function.
 5220 **      GUI_GET_INFO_R : Get Raid Set Information
 5221 **              byte 0,1        : length
 5222 **              byte 2          : command code 0x20
 5223 **              byte 3          : raidset#
 5224 **
 5225 **      typedef struct sGUI_RAIDSET
 5226 **      {
 5227 **              BYTE grsRaidSetName[16];
 5228 **              DWORD grsCapacity;
 5229 **              DWORD grsCapacityX;
 5230 **              DWORD grsFailMask;
 5231 **              BYTE grsDevArray[32];
 5232 **              BYTE grsMemberDevices;
 5233 **              BYTE grsNewMemberDevices;
 5234 **              BYTE grsRaidState;
 5235 **              BYTE grsVolumes;
 5236 **              BYTE grsVolumeList[16];
 5237 **              BYTE grsRes1;
 5238 **              BYTE grsRes2;
 5239 **              BYTE grsRes3;
 5240 **              BYTE grsFreeSegments;
 5241 **              DWORD grsRawStripes[8];
 5242 **              DWORD grsRes4;
 5243 **              DWORD grsRes5; //     Total to 128 bytes
 5244 **              DWORD grsRes6; //     Total to 128 bytes
 5245 **      } sGUI_RAIDSET, *pGUI_RAIDSET;
 5246 **      GUI_GET_INFO_V : Get Volume Set Information
 5247 **              byte 0,1        : length
 5248 **              byte 2          : command code 0x21
 5249 **              byte 3          : volumeset#
 5250 **
 5251 **      typedef struct sGUI_VOLUMESET
 5252 **      {
 5253 **              BYTE gvsVolumeName[16]; //     16
 5254 **              DWORD gvsCapacity;
 5255 **              DWORD gvsCapacityX;
 5256 **              DWORD gvsFailMask;
 5257 **              DWORD gvsStripeSize;
 5258 **              DWORD gvsNewFailMask;
 5259 **              DWORD gvsNewStripeSize;
 5260 **              DWORD gvsVolumeStatus;
 5261 **              DWORD gvsProgress; //     32
 5262 **              sSCSI_ATTR gvsScsi; 
 5263 **              BYTE gvsMemberDisks;
 5264 **              BYTE gvsRaidLevel; //     8
 5265 **
 5266 **              BYTE gvsNewMemberDisks;
 5267 **              BYTE gvsNewRaidLevel;
 5268 **              BYTE gvsRaidSetNumber;
 5269 **              BYTE gvsRes0; //     4
 5270 **              BYTE gvsRes1[4]; //     64 bytes
 5271 **      } sGUI_VOLUMESET, *pGUI_VOLUMESET;
 5272 **
 5273 **      GUI_GET_INFO_P : Get Physical Drive Information
 5274 **              byte 0,1        : length
 5275 **              byte 2          : command code 0x22
 5276 **              byte 3          : drive # (from 0 to max-channels - 1)
 5277 **
 5278 **      typedef struct sGUI_PHY_DRV
 5279 **      {
 5280 **              BYTE gpdModelName[40];
 5281 **              BYTE gpdSerialNumber[20];
 5282 **              BYTE gpdFirmRev[8];
 5283 **              DWORD gpdCapacity;
 5284 **              DWORD gpdCapacityX; //     Reserved for expansion
 5285 **              BYTE gpdDeviceState;
 5286 **              BYTE gpdPioMode;
 5287 **              BYTE gpdCurrentUdmaMode;
 5288 **              BYTE gpdUdmaMode;
 5289 **              BYTE gpdDriveSelect;
 5290 **              BYTE gpdRaidNumber; //     0xff if not belongs to a raid set
 5291 **              sSCSI_ATTR gpdScsi;
 5292 **              BYTE gpdReserved[40]; //     Total to 128 bytes
 5293 **      } sGUI_PHY_DRV, *pGUI_PHY_DRV;
 5294 **
 5295 **      GUI_GET_INFO_S : Get System Information
 5296 **              byte 0,1        : length
 5297 **              byte 2          : command code 0x23
 5298 **
 5299 **      typedef struct sCOM_ATTR
 5300 **      {
 5301 **              BYTE comBaudRate;
 5302 **              BYTE comDataBits;
 5303 **              BYTE comStopBits;
 5304 **              BYTE comParity;
 5305 **              BYTE comFlowControl;
 5306 **      } sCOM_ATTR, *pCOM_ATTR;
 5307 **
 5308 **      typedef struct sSYSTEM_INFO
 5309 **      {
 5310 **              BYTE gsiVendorName[40];
 5311 **              BYTE gsiSerialNumber[16];
 5312 **              BYTE gsiFirmVersion[16];
 5313 **              BYTE gsiBootVersion[16];
 5314 **              BYTE gsiMbVersion[16];
 5315 **              BYTE gsiModelName[8];
 5316 **              BYTE gsiLocalIp[4];
 5317 **              BYTE gsiCurrentIp[4];
 5318 **              DWORD gsiTimeTick;
 5319 **              DWORD gsiCpuSpeed;
 5320 **              DWORD gsiICache;
 5321 **              DWORD gsiDCache;
 5322 **              DWORD gsiScache;
 5323 **              DWORD gsiMemorySize;
 5324 **              DWORD gsiMemorySpeed;
 5325 **              DWORD gsiEvents;
 5326 **              BYTE gsiMacAddress[6];
 5327 **              BYTE gsiDhcp;
 5328 **              BYTE gsiBeeper;
 5329 **              BYTE gsiChannelUsage;
 5330 **              BYTE gsiMaxAtaMode;
 5331 **              BYTE gsiSdramEcc; //     1:if ECC enabled
 5332 **              BYTE gsiRebuildPriority;
 5333 **              sCOM_ATTR gsiComA; //     5 bytes
 5334 **              sCOM_ATTR gsiComB; //     5 bytes
 5335 **              BYTE gsiIdeChannels;
 5336 **              BYTE gsiScsiHostChannels;
 5337 **              BYTE gsiIdeHostChannels;
 5338 **              BYTE gsiMaxVolumeSet;
 5339 **              BYTE gsiMaxRaidSet;
 5340 **              BYTE gsiEtherPort; //     1:if ether net port supported
 5341 **              BYTE gsiRaid6Engine; //     1:Raid6 engine supported
 5342 **              BYTE gsiRes[75];
 5343 **      } sSYSTEM_INFO, *pSYSTEM_INFO;
 5344 **
 5345 **      GUI_CLEAR_EVENT : Clear System Event
 5346 **              byte 0,1        : length
 5347 **              byte 2          : command code 0x24
 5348 **
 5349 **      GUI_MUTE_BEEPER : Mute current beeper
 5350 **              byte 0,1        : length
 5351 **              byte 2          : command code 0x30
 5352 **
 5353 **      GUI_BEEPER_SETTING : Disable beeper
 5354 **              byte 0,1        : length
 5355 **              byte 2          : command code 0x31
 5356 **              byte 3          : 0->disable, 1->enable
 5357 **
 5358 **      GUI_SET_PASSWORD : Change password
 5359 **              byte 0,1        : length
 5360 **              byte 2                  : command code 0x32
 5361 **              byte 3                  : pass word length ( must <= 15 )
 5362 **              byte 4                  : password (must be alpha-numerical)
 5363 **
 5364 **      GUI_HOST_INTERFACE_MODE : Set host interface mode
 5365 **              byte 0,1        : length
 5366 **              byte 2                  : command code 0x33
 5367 **              byte 3                  : 0->Independent, 1->cluster
 5368 **
 5369 **      GUI_REBUILD_PRIORITY : Set rebuild priority
 5370 **              byte 0,1        : length
 5371 **              byte 2                  : command code 0x34
 5372 **              byte 3                  : 0/1/2/3 (low->high)
 5373 **
 5374 **      GUI_MAX_ATA_MODE : Set maximum ATA mode to be used
 5375 **              byte 0,1        : length
 5376 **              byte 2                  : command code 0x35
 5377 **              byte 3                  : 0/1/2/3 (133/100/66/33)
 5378 **
 5379 **      GUI_RESET_CONTROLLER : Reset Controller
 5380 **              byte 0,1        : length
 5381 **              byte 2          : command code 0x36
 5382 **                            *Response with VT100 screen (discard it)
 5383 **
 5384 **      GUI_COM_PORT_SETTING : COM port setting
 5385 **              byte 0,1        : length
 5386 **              byte 2                  : command code 0x37
 5387 **              byte 3                  : 0->COMA (term port), 1->COMB (debug port)
 5388 **              byte 4                  : 0/1/2/3/4/5/6/7 (1200/2400/4800/9600/19200/38400/57600/115200)
 5389 **              byte 5                  : data bit (0:7 bit, 1:8 bit : must be 8 bit)
 5390 **              byte 6                  : stop bit (0:1, 1:2 stop bits)
 5391 **              byte 7                  : parity (0:none, 1:off, 2:even)
 5392 **              byte 8                  : flow control (0:none, 1:xon/xoff, 2:hardware => must use none)
 5393 **
 5394 **      GUI_NO_OPERATION : No operation
 5395 **              byte 0,1        : length
 5396 **              byte 2          : command code 0x38
 5397 **
 5398 **      GUI_DHCP_IP : Set DHCP option and local IP address
 5399 **              byte 0,1        : length
 5400 **              byte 2          : command code 0x39
 5401 **              byte 3          : 0:dhcp disabled, 1:dhcp enabled
 5402 **              byte 4/5/6/7    : IP address
 5403 **
 5404 **      GUI_CREATE_PASS_THROUGH : Create pass through disk
 5405 **              byte 0,1        : length
 5406 **              byte 2                  : command code 0x40
 5407 **              byte 3                  : device #
 5408 **              byte 4                  : scsi channel (0/1)
 5409 **              byte 5                  : scsi id (0-->15)
 5410 **              byte 6                  : scsi lun (0-->7)
 5411 **              byte 7                  : tagged queue (1 : enabled)
 5412 **              byte 8                  : cache mode (1 : enabled)
 5413 **              byte 9                  : max speed (0/1/2/3/4, async/20/40/80/160 for scsi)
 5414 **                                                                  (0/1/2/3/4, 33/66/100/133/150 for ide  )
 5415 **
 5416 **      GUI_MODIFY_PASS_THROUGH : Modify pass through disk
 5417 **              byte 0,1        : length
 5418 **              byte 2                  : command code 0x41
 5419 **              byte 3                  : device #
 5420 **              byte 4                  : scsi channel (0/1)
 5421 **              byte 5                  : scsi id (0-->15)
 5422 **              byte 6                  : scsi lun (0-->7)
 5423 **              byte 7                  : tagged queue (1 : enabled)
 5424 **              byte 8                  : cache mode (1 : enabled)
 5425 **              byte 9                  : max speed (0/1/2/3/4, async/20/40/80/160 for scsi)
 5426 **                                                              (0/1/2/3/4, 33/66/100/133/150 for ide  )
 5427 **
 5428 **      GUI_DELETE_PASS_THROUGH : Delete pass through disk
 5429 **              byte 0,1        : length
 5430 **              byte 2          : command code 0x42
 5431 **              byte 3          : device# to be deleted
 5432 **
 5433 **      GUI_IDENTIFY_DEVICE : Identify Device
 5434 **              byte 0,1        : length
 5435 **              byte 2          : command code 0x43
 5436 **              byte 3          : Flash Method(0:flash selected, 1:flash not selected)
 5437 **              byte 4/5/6/7    : IDE device mask to be flashed
 5438 **                           note .... no response data available
 5439 **
 5440 **      GUI_CREATE_RAIDSET : Create Raid Set
 5441 **              byte 0,1        : length
 5442 **              byte 2          : command code 0x50
 5443 **              byte 3/4/5/6    : device mask
 5444 **              byte 7-22       : raidset name (if byte 7 == 0:use default)
 5445 **
 5446 **      GUI_DELETE_RAIDSET : Delete Raid Set
 5447 **              byte 0,1        : length
 5448 **              byte 2          : command code 0x51
 5449 **              byte 3          : raidset#
 5450 **
 5451 **      GUI_EXPAND_RAIDSET : Expand Raid Set 
 5452 **              byte 0,1        : length
 5453 **              byte 2          : command code 0x52
 5454 **              byte 3          : raidset#
 5455 **              byte 4/5/6/7    : device mask for expansion
 5456 **              byte 8/9/10     : (8:0 no change, 1 change, 0xff:terminate, 9:new raid level,10:new stripe size 0/1/2/3/4/5->4/8/16/32/64/128K )
 5457 **              byte 11/12/13   : repeat for each volume in the raidset ....
 5458 **
 5459 **      GUI_ACTIVATE_RAIDSET : Activate incomplete raid set 
 5460 **              byte 0,1        : length
 5461 **              byte 2          : command code 0x53
 5462 **              byte 3          : raidset#
 5463 **
 5464 **      GUI_CREATE_HOT_SPARE : Create hot spare disk 
 5465 **              byte 0,1        : length
 5466 **              byte 2          : command code 0x54
 5467 **              byte 3/4/5/6    : device mask for hot spare creation
 5468 **
 5469 **      GUI_DELETE_HOT_SPARE : Delete hot spare disk 
 5470 **              byte 0,1        : length
 5471 **              byte 2          : command code 0x55
 5472 **              byte 3/4/5/6    : device mask for hot spare deletion
 5473 **
 5474 **      GUI_CREATE_VOLUME : Create volume set 
 5475 **              byte 0,1        : length
 5476 **              byte 2          : command code 0x60
 5477 **              byte 3          : raidset#
 5478 **              byte 4-19       : volume set name (if byte4 == 0, use default)
 5479 **              byte 20-27      : volume capacity (blocks)
 5480 **              byte 28                 : raid level
 5481 **              byte 29                 : stripe size (0/1/2/3/4/5->4/8/16/32/64/128K)
 5482 **              byte 30                 : channel
 5483 **              byte 31                 : ID
 5484 **              byte 32                 : LUN
 5485 **              byte 33                 : 1 enable tag
 5486 **              byte 34                 : 1 enable cache
 5487 **              byte 35                 : speed (0/1/2/3/4->async/20/40/80/160 for scsi)
 5488 **                                                              (0/1/2/3/4->33/66/100/133/150 for IDE  )
 5489 **              byte 36                 : 1 to select quick init
 5490 **
 5491 **      GUI_MODIFY_VOLUME : Modify volume Set
 5492 **              byte 0,1        : length
 5493 **              byte 2          : command code 0x61
 5494 **              byte 3          : volumeset#
 5495 **              byte 4-19       : new volume set name (if byte4 == 0, not change)
 5496 **              byte 20-27      : new volume capacity (reserved)
 5497 **              byte 28                 : new raid level
 5498 **              byte 29                 : new stripe size (0/1/2/3/4/5->4/8/16/32/64/128K)
 5499 **              byte 30                 : new channel
 5500 **              byte 31                 : new ID
 5501 **              byte 32                 : new LUN
 5502 **              byte 33                 : 1 enable tag
 5503 **              byte 34                 : 1 enable cache
 5504 **              byte 35                 : speed (0/1/2/3/4->async/20/40/80/160 for scsi)
 5505 **                                                              (0/1/2/3/4->33/66/100/133/150 for IDE  )
 5506 **
 5507 **      GUI_DELETE_VOLUME : Delete volume set
 5508 **              byte 0,1        : length
 5509 **              byte 2          : command code 0x62
 5510 **              byte 3          : volumeset#
 5511 **
 5512 **      GUI_START_CHECK_VOLUME : Start volume consistency check
 5513 **              byte 0,1        : length
 5514 **              byte 2          : command code 0x63
 5515 **              byte 3          : volumeset#
 5516 **
 5517 **      GUI_STOP_CHECK_VOLUME : Stop volume consistency check
 5518 **              byte 0,1        : length
 5519 **              byte 2          : command code 0x64
 5520 ** ---------------------------------------------------------------------   
 5521 **    4. Returned data
 5522 ** ---------------------------------------------------------------------   
 5523 **      (A) Header          : 3 bytes sequence (0x5E, 0x01, 0x61)
 5524 **      (B) Length          : 2 bytes (low byte 1st, excludes length and checksum byte)
 5525 **      (C) status or data  :
 5526 **           <1> If length == 1 ==> 1 byte status code
 5527 **                                                              #define GUI_OK                    0x41
 5528 **                                                              #define GUI_RAIDSET_NOT_NORMAL    0x42
 5529 **                                                              #define GUI_VOLUMESET_NOT_NORMAL  0x43
 5530 **                                                              #define GUI_NO_RAIDSET            0x44
 5531 **                                                              #define GUI_NO_VOLUMESET          0x45
 5532 **                                                              #define GUI_NO_PHYSICAL_DRIVE     0x46
 5533 **                                                              #define GUI_PARAMETER_ERROR       0x47
 5534 **                                                              #define GUI_UNSUPPORTED_COMMAND   0x48
 5535 **                                                              #define GUI_DISK_CONFIG_CHANGED   0x49
 5536 **                                                              #define GUI_INVALID_PASSWORD      0x4a
 5537 **                                                              #define GUI_NO_DISK_SPACE         0x4b
 5538 **                                                              #define GUI_CHECKSUM_ERROR        0x4c
 5539 **                                                              #define GUI_PASSWORD_REQUIRED     0x4d
 5540 **           <2> If length > 1 ==> data block returned from controller and the contents depends on the command code
 5541 **        (E) Checksum : checksum of length and status or data byte
 5542 **************************************************************************
 5543 */

Cache object: 4f8664a9000cd125bb8c7a12f0340c82


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