bios.h revision 272913 
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: stable/10/sys/amd64/include/pc/bios.h 272913 2014-10-10 20:47:23Z jhb $
28 */
29
30#ifndef _MACHINE_PC_BIOS_H_
31#define _MACHINE_PC_BIOS_H_
32
33/*
34 * Int 15:E820 'SMAP' structure
35 */
36#define SMAP_SIG	0x534D4150			/* 'SMAP' */
37
38#define	SMAP_TYPE_MEMORY	1
39#define	SMAP_TYPE_RESERVED	2
40#define	SMAP_TYPE_ACPI_RECLAIM	3
41#define	SMAP_TYPE_ACPI_NVS	4
42#define	SMAP_TYPE_ACPI_ERROR	5
43
44#define	SMAP_XATTR_ENABLED	0x00000001
45#define	SMAP_XATTR_NON_VOLATILE	0x00000002
46#define	SMAP_XATTR_MASK		(SMAP_XATTR_ENABLED | SMAP_XATTR_NON_VOLATILE)
47
48struct bios_smap {
49    u_int64_t	base;
50    u_int64_t	length;
51    u_int32_t	type;
52} __packed;
53
54/* Structure extended to include extended attribute field in ACPI 3.0. */
55struct bios_smap_xattr {
56    u_int64_t	base;
57    u_int64_t	length;
58    u_int32_t	type;
59    u_int32_t	xattr;
60} __packed;
61
62/*
63 * System Management BIOS
64 */
65#define	SMBIOS_START	0xf0000
66#define	SMBIOS_STEP	0x10
67#define	SMBIOS_OFF	0
68#define	SMBIOS_LEN	4
69#define	SMBIOS_SIG	"_SM_"
70
71struct smbios_eps {
72	uint8_t		anchor_string[4];		/* '_SM_' */
73	uint8_t		checksum;
74	uint8_t		length;
75	uint8_t		major_version;
76	uint8_t		minor_version;
77	uint16_t	maximum_structure_size;
78	uint8_t		entry_point_revision;
79	uint8_t		formatted_area[5];
80	uint8_t		intermediate_anchor_string[5];	/* '_DMI_' */
81	uint8_t		intermediate_checksum;
82	uint16_t	structure_table_length;
83	uint32_t	structure_table_address;
84	uint16_t	number_structures;
85	uint8_t		BCD_revision;
86};
87
88struct smbios_structure_header {
89	uint8_t		type;
90	uint8_t		length;
91	uint16_t	handle;
92};
93
94#ifdef _KERNEL
95#define BIOS_PADDRTOVADDR(x)	((x) + KERNBASE)
96#define BIOS_VADDRTOPADDR(x)	((x) - KERNBASE)
97
98struct bios_oem_signature {
99	char * anchor;		/* search anchor string in BIOS memory */
100	size_t offset;		/* offset from anchor (may be negative) */
101	size_t totlen;		/* total length of BIOS string to copy */
102} __packed;
103
104struct bios_oem_range {
105	u_int from;		/* shouldn't be below 0xe0000 */
106	u_int to;		/* shouldn't be above 0xfffff */
107} __packed;
108
109struct bios_oem {
110	struct bios_oem_range range;
111	struct bios_oem_signature signature[];
112} __packed;
113
114int	bios_oem_strings(struct bios_oem *oem, u_char *buffer, size_t maxlen);
115uint32_t bios_sigsearch(uint32_t start, u_char *sig, int siglen, int paralen,
116	    int sigofs);
117#endif
118
119#endif /* _MACHINE_PC_BIOS_H_ */
120