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: head/sys/i386/include/pc/bios.h 270828 2014-08-29 21:25:47Z jhb $
   28  */
   29 
   30 #ifndef _MACHINE_PC_BIOS_H_
   31 #define _MACHINE_PC_BIOS_H_
   32 
   33 /* 
   34  * Signature structure for the BIOS32 Service Directory header 
   35  */
   36 struct bios32_SDheader 
   37 {
   38     u_int8_t    sig[4];
   39     u_int32_t   entry;
   40     u_int8_t    revision;
   41     u_int8_t    len;
   42     u_int8_t    cksum;
   43     u_int8_t    pad[5];
   44 };
   45 
   46 /* 
   47  * PnP BIOS presence structure
   48  */
   49 struct PnPBIOS_table 
   50 {
   51     u_int8_t    sig[4];                 /* "$PnP */
   52     u_int8_t    version;                /* should be 0x10 */
   53     u_int8_t    len;                    /* total structure length */
   54     u_int16_t   control;                /* BIOS feature flags */
   55     u_int8_t    cksum;                  /* checksum */
   56     u_int32_t   evflagaddr;             /* address of event notificaton flag */
   57     u_int16_t   rmentryoffset;          /* real-mode entry offset */
   58     u_int16_t   rmentryseg;             /*                 segment */
   59     u_int16_t   pmentryoffset;          /* protected-mode entry offset */
   60     u_int32_t   pmentrybase;            /*                segment base */
   61     u_int32_t   oemdevid;               /* motherboard EISA ID */
   62     u_int16_t   rmbiosseg;              /* real-mode BIOS segment */
   63     u_int32_t   pmdataseg;              /* protected-mode data segment */
   64 } __packed;
   65 
   66 /*
   67  * PnP BIOS return codes
   68  */
   69 #define PNP_SUCCESS                             0x00
   70 #define PNP_NOT_SET_STATICALLY                  0x7f
   71 #define PNP_UNKNOWN_FUNCTION                    0x81
   72 #define PNP_FUNCTION_NOT_SUPPORTED              0x82
   73 #define PNP_INVALID_HANDLE                      0x83
   74 #define PNP_BAD_PARAMETER                       0x84
   75 #define PNP_SET_FAILED                          0x85
   76 #define PNP_EVENTS_NOT_PENDING                  0x86
   77 #define PNP_SYSTEM_NOT_DOCKED                   0x87
   78 #define PNP_NO_ISA_PNP_CARDS                    0x88
   79 #define PNP_UNABLE_TO_DETERMINE_DOCK_CAPABILITIES 0x89
   80 #define PNP_CONFIG_CHANGE_FAILED_NO_BATTERY     0x8a
   81 #define PNP_CONFIG_CHANGE_FAILED_RESOURCE_CONFLICT 0x8b
   82 #define PNP_BUFFER_TOO_SMALL                    0x8c
   83 #define PNP_USE_ESCD_SUPPORT                    0x8d
   84 #define PNP_MESSAGE_NOT_SUPPORTED               0x8e
   85 #define PNP_HARDWARE_ERROR                      0x8f
   86 
   87 /*
   88  * DMI return codes
   89  */
   90 #define DMI_SUCCESS                             0x00
   91 #define DMI_UNKNOWN_FUNCTION                    0x81
   92 #define DMI_FUNCTION_NOT_SUPPORTED              0x82
   93 #define DMI_INVALID_HANDLE                      0x83
   94 #define DMI_BAD_PARAMETER                       0x84
   95 #define DMI_INVALID_SUBFUNCTION                 0x85
   96 #define DMI_NO_CHANGE                           0x86
   97 #define DMI_ADD_STRUCTURE_FAILED                0x87
   98 #define DMI_READ_ONLY                           0x8d
   99 #define DMI_LOCK_NOT_SUPPORTED                  0x90
  100 #define DMI_CURRENTLY_LOCKED                    0x91
  101 #define DMI_INVALID_LOCK                        0x92
  102 
  103 /*
  104  * format specifiers and defines for bios16()
  105  *     s        = short (16 bits)
  106  *     i        = int (32 bits)
  107  *     p        = pointer (converted to seg:offset)
  108  *     C,D,U    = selector (corresponding to code/data/utility segment)
  109  */
  110 #define PNP_COUNT_DEVNODES      "sppD",         0x00
  111 #define PNP_GET_DEVNODE         "sppsD",        0x01
  112 #define PNP_SET_DEVNODE         "sspsD",        0x02
  113 #define PNP_GET_EVENT           "spD",          0x03
  114 #define PNP_SEND_MSG            "ssD",          0x04
  115 #define PNP_GET_DOCK_INFO       "spD",          0x05
  116 
  117 #define PNP_SEL_PRIBOOT         "ssiiisspD",    0x07
  118 #define PNP_GET_PRIBOOT         "sspppppD",     0x08
  119 #define PNP_SET_RESINFO         "spD",          0x09
  120 #define PNP_GET_RESINFO         "spD",          0x0A
  121 #define PNP_GET_APM_ID          "sppD",         0x0B
  122 
  123 #define PNP_GET_ISA_INFO        "spD",          0x40
  124 #define PNP_GET_ECSD_INFO       "spppD",        0x41
  125 #define PNP_READ_ESCD           "spUD",         0x42
  126 #define PNP_WRITE_ESCD          "spUD",         0x43
  127 
  128 #define PNP_GET_DMI_INFO        "spppppD",      0x50
  129 #define PNP_GET_DMI_STRUCTURE   "sppUD",        0x51
  130 #define PNP_SET_DMI_STRUCTURE   "sppsUD"        0x52
  131 #define PNP_GET_DMI_CHANGE      "spUD"          0x53
  132 #define PNP_DMI_CONTROL         "sspsUD"        0x54
  133 #define PNP_GET_GPNV_INFO       "sppppD"        0x55
  134 #define PNP_READ_GPNV_DATA      "ssppUD"        0x56
  135 #define PNP_WRITE_GPNV_DATA     "sspsUD"        0x57
  136 
  137 #define PNP_BOOT_CHECK          "sp",           0x60
  138 #define PNP_COUNT_IPL           "sppp",         0x61
  139 #define PNP_GET_BOOTPRI         "spp",          0x62
  140 #define PNP_SET_BOOTPRI         "sp",           0x63
  141 #define PNP_GET_LASTBOOT        "sp",           0x64
  142 #define PNP_GET_BOOTFIRST       "sp",           0x65
  143 #define PNP_SET_BOOTFIRST       "sp",           0x66
  144 
  145 /*
  146  * PCI BIOS functions
  147  */
  148 #define PCIBIOS_BIOS_PRESENT            0xb101
  149 #define PCIBIOS_READ_CONFIG_BYTE        0xb108
  150 #define PCIBIOS_READ_CONFIG_WORD        0xb109
  151 #define PCIBIOS_READ_CONFIG_DWORD       0xb10a
  152 #define PCIBIOS_WRITE_CONFIG_BYTE       0xb10b
  153 #define PCIBIOS_WRITE_CONFIG_WORD       0xb10c
  154 #define PCIBIOS_WRITE_CONFIG_DWORD      0xb10d
  155 #define PCIBIOS_GET_IRQ_ROUTING         0xb10e
  156 #define PCIBIOS_ROUTE_INTERRUPT         0xb10f
  157 
  158 /*
  159  * PCI interrupt routing table.
  160  *
  161  * $PIR in the BIOS segment contains a PIR_table
  162  * int 1a:b106 returns PIR_table in buffer at es:(e)di 
  163  * int 1a:b18e returns PIR_table in buffer at es:(e)di 
  164  * int 1a:b406 returns es:di pointing to the BIOS PIR_table
  165  */
  166 struct PIR_header 
  167 {
  168     int8_t      ph_signature[4];
  169     u_int16_t   ph_version;
  170     u_int16_t   ph_length;
  171     u_int8_t    ph_router_bus;
  172     u_int8_t    ph_router_dev_fn;
  173     u_int16_t   ph_pci_irqs;
  174     u_int16_t   ph_router_vendor;
  175     u_int16_t   ph_router_device;
  176     u_int32_t   ph_miniport;
  177     u_int8_t    ph_res[11];
  178     u_int8_t    ph_checksum;
  179 } __packed;
  180 
  181 struct PIR_intpin 
  182 {
  183     u_int8_t    link;
  184     u_int16_t   irqs;
  185 } __packed;
  186 
  187 struct PIR_entry
  188 {
  189     u_int8_t            pe_bus;
  190     u_int8_t            pe_res1:3;
  191     u_int8_t            pe_device:5;
  192     struct PIR_intpin   pe_intpin[4];
  193     u_int8_t    pe_slot;
  194     u_int8_t    pe_res3;
  195 } __packed;
  196 
  197 struct PIR_table 
  198 {
  199     struct PIR_header   pt_header;
  200     struct PIR_entry    pt_entry[0];
  201 } __packed;
  202 
  203 /*
  204  * Int 15:E820 'SMAP' structure
  205  */
  206 #define SMAP_SIG        0x534D4150                      /* 'SMAP' */
  207 
  208 #define SMAP_TYPE_MEMORY        1
  209 #define SMAP_TYPE_RESERVED      2
  210 #define SMAP_TYPE_ACPI_RECLAIM  3
  211 #define SMAP_TYPE_ACPI_NVS      4
  212 #define SMAP_TYPE_ACPI_ERROR    5
  213 
  214 #define SMAP_XATTR_ENABLED      0x00000001
  215 #define SMAP_XATTR_NON_VOLATILE 0x00000002
  216 #define SMAP_XATTR_MASK         (SMAP_XATTR_ENABLED | SMAP_XATTR_NON_VOLATILE)
  217 
  218 struct bios_smap {
  219     u_int64_t   base;
  220     u_int64_t   length;
  221     u_int32_t   type;
  222 } __packed;
  223 
  224 /* Structure extended to include extended attribute field in ACPI 3.0. */
  225 struct bios_smap_xattr {
  226     u_int64_t   base;
  227     u_int64_t   length;
  228     u_int32_t   type;
  229     u_int32_t   xattr;
  230 } __packed;
  231 
  232 /*
  233  * System Management BIOS
  234  */
  235 #define SMBIOS_START    0xf0000
  236 #define SMBIOS_STEP     0x10
  237 #define SMBIOS_OFF      0
  238 #define SMBIOS_LEN      4
  239 #define SMBIOS_SIG      "_SM_"
  240 
  241 struct smbios_eps {
  242         uint8_t         anchor_string[4];               /* '_SM_' */
  243         uint8_t         checksum;
  244         uint8_t         length;
  245         uint8_t         major_version;
  246         uint8_t         minor_version;
  247         uint16_t        maximum_structure_size;
  248         uint8_t         entry_point_revision;
  249         uint8_t         formatted_area[5];
  250         uint8_t         intermediate_anchor_string[5];  /* '_DMI_' */
  251         uint8_t         intermediate_checksum;
  252         uint16_t        structure_table_length;
  253         uint32_t        structure_table_address;
  254         uint16_t        number_structures;
  255         uint8_t         BCD_revision;
  256 };
  257 
  258 struct smbios_structure_header {
  259         uint8_t         type;
  260         uint8_t         length;
  261         uint16_t        handle;
  262 };
  263 
  264 #ifdef _KERNEL
  265 #define BIOS_PADDRTOVADDR(x)    ((x) + KERNBASE)
  266 #define BIOS_VADDRTOPADDR(x)    ((x) - KERNBASE)
  267 
  268 struct bios_oem_signature {
  269         char * anchor;          /* search anchor string in BIOS memory */
  270         size_t offset;          /* offset from anchor (may be negative) */
  271         size_t totlen;          /* total length of BIOS string to copy */
  272 } __packed;
  273 
  274 struct bios_oem_range {
  275         u_int from;             /* shouldn't be below 0xe0000 */
  276         u_int to;               /* shouldn't be above 0xfffff */
  277 } __packed;
  278 
  279 struct bios_oem {
  280         struct bios_oem_range range;
  281         struct bios_oem_signature signature[];
  282 } __packed;
  283 
  284 struct segment_info {
  285         u_int   base;
  286         u_int   limit;
  287 };
  288 
  289 #define BIOSCODE_FLAG   0x01
  290 #define BIOSDATA_FLAG   0x02
  291 #define BIOSUTIL_FLAG   0x04
  292 #define BIOSARGS_FLAG   0x08
  293 
  294 struct bios_segments {
  295         struct  segment_info code32;            /* 32-bit code (mandatory) */
  296         struct  segment_info code16;            /* 16-bit code */
  297         struct  segment_info data;              /* 16-bit data */
  298         struct  segment_info util;              /* 16-bit utility */
  299         struct  segment_info args;              /* 16-bit args */
  300 };
  301 
  302 struct bios_regs {
  303         u_int   eax;
  304         u_int   ebx;
  305         u_int   ecx;
  306         u_int   edx;
  307         u_int   esi;
  308         u_int   edi;
  309 };
  310 
  311 struct bios_args {
  312         u_int   entry;                          /* entry point of routine */
  313         struct  bios_regs r;
  314         struct  bios_segments seg;
  315 };
  316 
  317 /* 
  318  * BIOS32 Service Directory entry.  Caller supplies name, bios32_SDlookup
  319  * fills in the rest of the details.
  320  */
  321 struct bios32_SDentry 
  322 {
  323     union 
  324     {
  325         u_int8_t        name[4];        /* service identifier */
  326         u_int32_t       id;             /* as a 32-bit value */
  327     } ident;
  328     u_int32_t   base;                   /* base of service */
  329     u_int32_t   len;                    /* service length */
  330     u_int32_t   entry;                  /* entrypoint offset from base */
  331     vm_offset_t ventry;                 /* entrypoint in kernel virtual segment */
  332 };
  333 
  334 /*
  335  * Exported lookup results 
  336  */
  337 extern struct bios32_SDentry    PCIbios;
  338 
  339 int     bios_oem_strings(struct bios_oem *oem, u_char *buffer, size_t maxlen);
  340 uint32_t bios_sigsearch(uint32_t start, u_char *sig, int siglen, int paralen,
  341             int sigofs);
  342 int     bios16(struct bios_args *, char *, ...);
  343 int     bios16_call(struct bios_regs *, char *);
  344 int     bios32(struct bios_regs *, u_int, u_short);
  345 int     bios32_SDlookup(struct bios32_SDentry *ent);
  346 void    set_bios_selectors(struct bios_segments *, int);
  347 
  348 #endif
  349 
  350 #endif /* _MACHINE_PC_BIOS_H_ */

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