2 * Copyright (c) 1997 Michael Smith
3 * Copyright (c) 1998 Jonathan Lemon
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
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.
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
30 #ifndef _MACHINE_PC_BIOS_H_
31 #define _MACHINE_PC_BIOS_H_
34 * Int 15:E820 'SMAP' structure
36 #define SMAP_SIG 0x534D4150 /* 'SMAP' */
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
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)
54 /* Structure extended to include extended attribute field in ACPI 3.0. */
55 struct bios_smap_xattr {
63 * System Management BIOS
65 #define SMBIOS_START 0xf0000
66 #define SMBIOS_STEP 0x10
69 #define SMBIOS_SIG "_SM_"
72 uint8_t anchor_string[4]; /* '_SM_' */
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;
88 struct smbios_structure_header {
95 #define BIOS_PADDRTOVADDR(x) ((x) + KERNBASE)
96 #define BIOS_VADDRTOPADDR(x) ((x) - KERNBASE)
98 struct 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 */
104 struct bios_oem_range {
105 u_int from; /* shouldn't be below 0xe0000 */
106 u_int to; /* shouldn't be above 0xfffff */
110 struct bios_oem_range range;
111 struct bios_oem_signature signature[];
114 int bios_oem_strings(struct bios_oem *oem, u_char *buffer, size_t maxlen);
115 uint32_t bios_sigsearch(uint32_t start, u_char *sig, int siglen, int paralen,
119 #endif /* _MACHINE_PC_BIOS_H_ */