The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/i386/include/pc/bios.h

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    1 /*-
    2  * Copyright (c) 1997 Michael Smith
    3  * Copyright (c) 1998 Jonathan Lemon
    4  * All rights reserved.
    5  *
    6  * Redistribution and use in source and binary forms, with or without
    7  * modification, are permitted provided that the following conditions
    8  * are met:
    9  * 1. Redistributions of source code must retain the above copyright
   10  *    notice, this list of conditions and the following disclaimer.
   11  * 2. Redistributions in binary form must reproduce the above copyright
   12  *    notice, this list of conditions and the following disclaimer in the
   13  *    documentation and/or other materials provided with the distribution.
   14  *
   15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   16  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   17  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   18  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   19  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   20  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   21  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   22  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   23  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   24  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   25  * SUCH DAMAGE.
   26  *
   27  * $FreeBSD: releng/5.1/sys/i386/include/pc/bios.h 103870 2002-09-23 18:54:32Z alfred $
   28  */
   29 
   30 /* 
   31  * Signature structure for the BIOS32 Service Directory header 
   32  */
   33 struct bios32_SDheader 
   34 {
   35     u_int8_t    sig[4];
   36     u_int32_t   entry;
   37     u_int8_t    revision;
   38     u_int8_t    len;
   39     u_int8_t    cksum;
   40     u_int8_t    pad[5];
   41 };
   42 
   43 /* 
   44  * BIOS32 Service Directory entry.  Caller supplies name, bios32_SDlookup
   45  * fills in the rest of the details.
   46  */
   47 struct bios32_SDentry 
   48 {
   49     union 
   50     {
   51         u_int8_t        name[4];        /* service identifier */
   52         u_int32_t       id;             /* as a 32-bit value */
   53     } ident;
   54     u_int32_t   base;                   /* base of service */
   55     u_int32_t   len;                    /* service length */
   56     u_int32_t   entry;                  /* entrypoint offset from base */
   57     vm_offset_t ventry;                 /* entrypoint in kernel virtual segment */
   58 };
   59 
   60 extern int              bios32_SDlookup(struct bios32_SDentry *ent);
   61 extern u_int32_t        bios_sigsearch(u_int32_t start, u_char *sig, int siglen, 
   62                                          int paralen, int sigofs);
   63 
   64 #define BIOS_PADDRTOVADDR(x)    (((x) - ISA_HOLE_START) + atdevbase)
   65 #define BIOS_VADDRTOPADDR(x)    (((x) - atdevbase) + ISA_HOLE_START)
   66 
   67 
   68 /* 
   69  * PnP BIOS presence structure
   70  */
   71 struct PnPBIOS_table 
   72 {
   73     u_int8_t    sig[4];                 /* "$PnP */
   74     u_int8_t    version;                /* should be 0x10 */
   75     u_int8_t    len;                    /* total structure length */
   76     u_int16_t   control;                /* BIOS feature flags */
   77     u_int8_t    cksum;                  /* checksum */
   78     u_int32_t   evflagaddr;             /* address of event notificaton flag */
   79     u_int16_t   rmentryoffset;          /* real-mode entry offset */
   80     u_int16_t   rmentryseg;             /*                 segment */
   81     u_int16_t   pmentryoffset;          /* protected-mode entry offset */
   82     u_int32_t   pmentrybase;            /*                segment base */
   83     u_int32_t   oemdevid;               /* motherboard EISA ID */
   84     u_int16_t   rmbiosseg;              /* real-mode BIOS segment */
   85     u_int32_t   pmdataseg;              /* protected-mode data segment */
   86 } __packed;
   87 
   88 
   89 /* 
   90  * Exported lookup results 
   91  */
   92 extern struct bios32_SDentry    PCIbios;
   93 extern struct PnPBIOS_table     *PnPBIOStable;
   94 
   95 struct segment_info {
   96         u_int   base;
   97         u_int   limit;
   98 };
   99 
  100 #define BIOSCODE_FLAG   0x01
  101 #define BIOSDATA_FLAG   0x02
  102 #define BIOSUTIL_FLAG   0x04
  103 #define BIOSARGS_FLAG   0x08
  104 
  105 struct bios_segments {
  106         struct  segment_info code32;            /* 32-bit code (mandatory) */
  107         struct  segment_info code16;            /* 16-bit code */
  108         struct  segment_info data;              /* 16-bit data */
  109         struct  segment_info util;              /* 16-bit utility */
  110         struct  segment_info args;              /* 16-bit args */
  111 };
  112 
  113 struct bios_regs {
  114         u_int   eax;
  115         u_int   ebx;
  116         u_int   ecx;
  117         u_int   edx;
  118         u_int   esi;
  119         u_int   edi;
  120 };
  121 
  122 struct bios_args {
  123         u_int   entry;                          /* entry point of routine */
  124         struct  bios_regs r;
  125         struct  bios_segments seg;
  126 };
  127 
  128 /*
  129  * PnP BIOS return codes
  130  */
  131 #define PNP_SUCCESS                             0x00
  132 #define PNP_NOT_SET_STATICALLY                  0x7f
  133 #define PNP_UNKNOWN_FUNCTION                    0x81
  134 #define PNP_FUNTION_NOT_SUPPORTED               0x82
  135 #define PNP_INVALID_HANDLE                      0x83
  136 #define PNP_BAD_PARAMETER                       0x84
  137 #define PNP_SET_FAILED                          0x85
  138 #define PNP_EVENTS_NOT_PENDING                  0x86
  139 #define PNP_SYSTEM_NOT_DOCKED                   0x87
  140 #define PNP_NO_ISA_PNP_CARDS                    0x88
  141 #define PNP_UNABLE_TO_DETERMINE_DOCK_CAPABILITIES 0x89
  142 #define PNP_CONFIG_CHANGE_FAILED_NO_BATTERY     0x8a
  143 #define PNP_CONFIG_CHANGE_FAILED_RESOURCE_CONFLICT 0x8b
  144 #define PNP_BUFFER_TOO_SMALL                    0x8c
  145 #define PNP_USE_ESCD_SUPPORT                    0x8d
  146 #define PNP_MESSAGE_NOT_SUPPORTED               0x8e
  147 #define PNP_HARDWARE_ERROR                      0x8f
  148 
  149 /*
  150  * DMI return codes
  151  */
  152 #define DMI_SUCCESS                             0x00
  153 #define DMI_UNKNOWN_FUNCTION                    0x81
  154 #define DMI_FUNCTION_NOT_SUPPORTED              0x82
  155 #define DMI_INVALID_HANDLE                      0x83
  156 #define DMI_BAD_PARAMETER                       0x84
  157 #define DMI_INVALID_SUBFUNCTION                 0x85
  158 #define DMI_NO_CHANGE                           0x86
  159 #define DMI_ADD_STRUCTURE_FAILED                0x87
  160 #define DMI_READ_ONLY                           0x8d
  161 #define DMI_LOCK_NOT_SUPPORTED                  0x90
  162 #define DMI_CURRENTLY_LOCKED                    0x91
  163 #define DMI_INVALID_LOCK                        0x92
  164 
  165 /*
  166  * format specifiers and defines for bios16()
  167  *     s        = short (16 bits)
  168  *     i        = int (32 bits)
  169  *     p        = pointer (converted to seg:offset)
  170  *     C,D,U    = selector (corresponding to code/data/utility segment)
  171  */
  172 #define PNP_COUNT_DEVNODES      "sppD",         0x00
  173 #define PNP_GET_DEVNODE         "sppsD",        0x01
  174 #define PNP_SET_DEVNODE         "sspsD",        0x02
  175 #define PNP_GET_EVENT           "spD",          0x03
  176 #define PNP_SEND_MSG            "ssD",          0x04
  177 #define PNP_GET_DOCK_INFO       "spD",          0x05
  178 
  179 #define PNP_SEL_PRIBOOT         "ssiiisspD",    0x07
  180 #define PNP_GET_PRIBOOT         "sspppppD",     0x08
  181 #define PNP_SET_RESINFO         "spD",          0x09
  182 #define PNP_GET_RESINFO         "spD",          0x0A
  183 #define PNP_GET_APM_ID          "sppD",         0x0B
  184 
  185 #define PNP_GET_ISA_INFO        "spD",          0x40
  186 #define PNP_GET_ECSD_INFO       "spppD",        0x41
  187 #define PNP_READ_ESCD           "spUD",         0x42
  188 #define PNP_WRITE_ESCD          "spUD",         0x43
  189 
  190 #define PNP_GET_DMI_INFO        "spppppD",      0x50
  191 #define PNP_GET_DMI_STRUCTURE   "sppUD",        0x51
  192 #define PNP_SET_DMI_STRUCTURE   "sppsUD"        0x52
  193 #define PNP_GET_DMI_CHANGE      "spUD"          0x53
  194 #define PNP_DMI_CONTROL         "sspsUD"        0x54
  195 #define PNP_GET_GPNV_INFO       "sppppD"        0x55
  196 #define PNP_READ_GPNV_DATA      "ssppUD"        0x56
  197 #define PNP_WRITE_GPNV_DATA     "sspsUD"        0x57
  198 
  199 #define PNP_BOOT_CHECK          "sp",           0x60
  200 #define PNP_COUNT_IPL           "sppp",         0x61
  201 #define PNP_GET_BOOTPRI         "spp",          0x62
  202 #define PNP_SET_BOOTPRI         "sp",           0x63
  203 #define PNP_GET_LASTBOOT        "sp",           0x64
  204 #define PNP_GET_BOOTFIRST       "sp",           0x65
  205 #define PNP_SET_BOOTFIRST       "sp",           0x66
  206 
  207 /*
  208  * PCI BIOS functions
  209  */
  210 #define PCIBIOS_BIOS_PRESENT            0xb101
  211 #define PCIBIOS_READ_CONFIG_BYTE        0xb108
  212 #define PCIBIOS_READ_CONFIG_WORD        0xb109
  213 #define PCIBIOS_READ_CONFIG_DWORD       0xb10a
  214 #define PCIBIOS_WRITE_CONFIG_BYTE       0xb10b
  215 #define PCIBIOS_WRITE_CONFIG_WORD       0xb10c
  216 #define PCIBIOS_WRITE_CONFIG_DWORD      0xb10d
  217 #define PCIBIOS_GET_IRQ_ROUTING         0xb10e
  218 #define PCIBIOS_ROUTE_INTERRUPT         0xb10f
  219 
  220 extern int bios16(struct bios_args *, char *, ...);
  221 extern int bios16_call(struct bios_regs *, char *);
  222 extern int bios32(struct bios_regs *, u_int, u_short);
  223 extern void set_bios_selectors(struct bios_segments *, int);
  224 
  225 /*
  226  * PCI interrupt routing table.
  227  *
  228  * $PIR in the BIOS segment contains a PIR_table
  229  * int 1a:b106 returns PIR_table in buffer at es:(e)di 
  230  * int 1a:b18e returns PIR_table in buffer at es:(e)di 
  231  * int 1a:b406 returns es:di pointing to the BIOS PIR_table
  232  */
  233 struct PIR_header 
  234 {
  235     int8_t      ph_signature[4];
  236     u_int16_t   ph_version;
  237     u_int16_t   ph_length;
  238     u_int8_t    ph_router_bus;
  239     u_int8_t    ph_router_dev_fn;
  240     u_int16_t   ph_pci_irqs;
  241     u_int16_t   ph_router_vendor;
  242     u_int16_t   ph_router_device;
  243     u_int32_t   ph_miniport;
  244     u_int8_t    ph_res[11];
  245     u_int8_t    ph_checksum;
  246 } __packed;
  247 
  248 struct PIR_intpin 
  249 {
  250     u_int8_t    link;
  251     u_int16_t   irqs;
  252 } __packed;
  253 
  254 struct PIR_entry
  255 {
  256     u_int8_t            pe_bus;
  257     u_int8_t            pe_res1:3;
  258     u_int8_t            pe_device:5;
  259     struct PIR_intpin   pe_intpin[4];
  260     u_int8_t    pe_slot;
  261     u_int8_t    pe_res3;
  262 } __packed;
  263 
  264 struct PIR_table 
  265 {
  266     struct PIR_header   pt_header;
  267     struct PIR_entry    pt_entry[0];
  268 } __packed;
  269 
  270 /*
  271  * Int 15:E820 'SMAP' structure
  272  *
  273  * XXX add constants for type
  274  */
  275 #define SMAP_SIG        0x534D4150                      /* 'SMAP' */
  276 struct bios_smap {
  277     u_int64_t   base;
  278     u_int64_t   length;
  279     u_int32_t   type;
  280 } __packed;

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