bios.h revision 27873 
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 *      $Id: bios.h,v 1.1 1997/08/01 06:04:59 msmith Exp $
27 */
28
29/*
30 * Signature structure for the BIOS32 Service Directory header
31 */
32struct 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 */
46struct 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
58extern int		bios32_SDlookup(struct bios32_SDentry *ent);
59extern 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 */
65struct bios32_args {
66    u_long eax;
67    u_long ebx;
68    u_long ecx;
69    u_long edx;
70};
71extern 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
81struct 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
91struct 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 */
107extern struct bios32_SDentry	PCIbios;
108extern struct SMBIOS_table	*SMBIOS_table;
109extern struct DMI_table		*DMI_table;
110
111
112
113