bios.h revision 191111 
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/amd64/include/pc/bios.h 191111 2009-04-15 17:31:22Z jkim $
28 */
29
30#ifndef _MACHINE_PC_BIOS_H_
31#define _MACHINE_PC_BIOS_H_
32
33extern u_int32_t	bios_sigsearch(u_int32_t start, u_char *sig, int siglen,
34					 int paralen, int sigofs);
35
36#define BIOS_PADDRTOVADDR(x)	((x) + KERNBASE)
37#define BIOS_VADDRTOPADDR(x)	((x) - KERNBASE)
38
39/*
40 * Int 15:E820 'SMAP' structure
41 */
42
43#define SMAP_SIG	0x534D4150			/* 'SMAP' */
44
45#define	SMAP_TYPE_MEMORY	1
46#define	SMAP_TYPE_RESERVED	2
47#define	SMAP_TYPE_ACPI_RECLAIM	3
48#define	SMAP_TYPE_ACPI_NVS	4
49#define	SMAP_TYPE_ACPI_ERROR	5
50
51#define	SMAP_XATTR_ENABLED	0x00000001
52#define	SMAP_XATTR_NON_VOLATILE	0x00000002
53#define	SMAP_XATTR_MASK		(SMAP_XATTR_ENABLED | SMAP_XATTR_NON_VOLATILE)
54
55struct bios_smap {
56    u_int64_t	base;
57    u_int64_t	length;
58    u_int32_t	type;
59} __packed;
60
61struct bios_oem_signature {
62	char * anchor;		/* search anchor string in BIOS memory */
63	size_t offset;		/* offset from anchor (may be negative) */
64	size_t totlen;		/* total length of BIOS string to copy */
65} __packed;
66struct bios_oem_range {
67	u_int from;		/* shouldn't be below 0xe0000 */
68	u_int to;		/* shouldn't be above 0xfffff */
69} __packed;
70struct bios_oem {
71	struct bios_oem_range range;
72	struct bios_oem_signature signature[];
73} __packed;
74
75extern int
76bios_oem_strings(struct bios_oem *oem, u_char *buffer, size_t maxlen);
77
78
79#endif /* _MACHINE_PC_BIOS_H_ */
80