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  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  *
   14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   24  * SUCH DAMAGE.
   25  *
   26  * $FreeBSD: stable/3/sys/i386/include/pc/bios.h 50582 1999-08-29 16:07:53Z peter $
   27  */
   28 
   29 /* 
   30  * Signature structure for the BIOS32 Service Directory header 
   31  */
   32 struct bios32_SDheader 
   33 {
   34     u_int8_t    sig[4];
   35     u_int32_t   entry;
   36     u_int8_t    revision;
   37     u_int8_t    len;
   38     u_int8_t    cksum;
   39     u_int8_t    pad[5];
   40 };
   41 
   42 /* 
   43  * BIOS32 Service Directory entry.  Caller supplies name, bios32_SDlookup
   44  * fills in the rest of the details.
   45  */
   46 struct bios32_SDentry 
   47 {
   48     union 
   49     {
   50         u_int8_t        name[4];        /* service identifier */
   51         u_int32_t       id;             /* as a 32-bit value */
   52     } ident;
   53     u_int32_t   base;                   /* base of service */
   54     u_int32_t   len;                    /* service length */
   55     u_int32_t   entry;                  /* entrypoint offset from base */
   56 };
   57 
   58 extern int              bios32_SDlookup(struct bios32_SDentry *ent);
   59 extern u_int32_t        bios_sigsearch(u_int32_t start, u_char *sig, int siglen, 
   60                                          int paralen, int sigofs);
   61 
   62 /*
   63  * Call a 32-bit BIOS function
   64  */
   65 struct bios32_args {
   66     u_long eax;
   67     u_long ebx;
   68     u_long ecx;
   69     u_long edx;
   70 };
   71 extern void             bios32(caddr_t func_addr, struct bios32_args *args);
   72 
   73 #define BIOS_PADDRTOVADDR(x)    (((x) - ISA_HOLE_START) + atdevbase)
   74 #define BIOS_VADDRTOPADDR(x)    (((x) - atdevbase) + ISA_HOLE_START)
   75 
   76 
   77 /*
   78  * System Management BIOS / Desktop Management Interface tables
   79  */
   80 
   81 struct DMI_table 
   82 {
   83     u_int8_t    sig[5];                 /* "_DMI_" */
   84     u_int8_t    cksum;                  /* checksum */
   85     u_int16_t   st_size;                /* total length of SMBIOS table (bytes)*/
   86     u_int32_t   st_base;                /* base address of the SMBIOS table (physical) */
   87     u_int16_t   st_entries;             /* total number of structures present in the table */
   88     u_int8_t    bcd_revision;           /* interface revision number */
   89 };
   90 
   91 struct SMBIOS_table 
   92 {
   93     u_int8_t    sig[4];                 /* "_SM_" */
   94     u_int8_t    cksum;                  /* checksum */
   95     u_int8_t    len;                    /* structure length */
   96     u_int8_t    major, minor;           /* major/minor revision numbers */
   97     u_int16_t   st_maxsize;             /* largest structure size (bytes) */
   98     u_int8_t    revision;               /* entrypoint revision */
   99     u_int8_t    pad[5];
  100     struct DMI_table dmi;               /* follows immediately */
  101 };
  102 
  103 
  104 /* 
  105  * Exported lookup results 
  106  */
  107 extern struct bios32_SDentry    PCIbios;
  108 extern struct SMBIOS_table      *SMBIOS_table;
  109 extern struct DMI_table         *DMI_table;
  110 
  111 
  112     

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