2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 1997 Michael Smith
5 * Copyright (c) 1998 Jonathan Lemon
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 #ifndef _MACHINE_PC_BIOS_H_
33 #define _MACHINE_PC_BIOS_H_
36 * Int 15:E820 'SMAP' structure
38 #define SMAP_SIG 0x534D4150 /* 'SMAP' */
40 #define SMAP_TYPE_MEMORY 1
41 #define SMAP_TYPE_RESERVED 2
42 #define SMAP_TYPE_ACPI_RECLAIM 3
43 #define SMAP_TYPE_ACPI_NVS 4
44 #define SMAP_TYPE_ACPI_ERROR 5
45 #define SMAP_TYPE_DISABLED 6
46 #define SMAP_TYPE_PMEM 7
47 #define SMAP_TYPE_PRAM 12
49 #define SMAP_XATTR_ENABLED 0x00000001
50 #define SMAP_XATTR_NON_VOLATILE 0x00000002
51 #define SMAP_XATTR_MASK (SMAP_XATTR_ENABLED | SMAP_XATTR_NON_VOLATILE)
59 /* Structure extended to include extended attribute field in ACPI 3.0. */
60 struct bios_smap_xattr {
68 * System Management BIOS
70 #define SMBIOS_START 0xf0000
71 #define SMBIOS_STEP 0x10
74 #define SMBIOS_SIG "_SM_"
77 uint8_t anchor_string[4]; /* '_SM_' */
80 uint8_t major_version;
81 uint8_t minor_version;
82 uint16_t maximum_structure_size;
83 uint8_t entry_point_revision;
84 uint8_t formatted_area[5];
85 uint8_t intermediate_anchor_string[5]; /* '_DMI_' */
86 uint8_t intermediate_checksum;
87 uint16_t structure_table_length;
88 uint32_t structure_table_address;
89 uint16_t number_structures;
93 struct smbios_structure_header {
100 #define BIOS_PADDRTOVADDR(x) ((x) + KERNBASE)
101 #define BIOS_VADDRTOPADDR(x) ((x) - KERNBASE)
103 struct bios_oem_signature {
104 char * anchor; /* search anchor string in BIOS memory */
105 size_t offset; /* offset from anchor (may be negative) */
106 size_t totlen; /* total length of BIOS string to copy */
109 struct bios_oem_range {
110 u_int from; /* shouldn't be below 0xe0000 */
111 u_int to; /* shouldn't be above 0xfffff */
115 struct bios_oem_range range;
116 struct bios_oem_signature signature[];
119 int bios_oem_strings(struct bios_oem *oem, u_char *buffer, size_t maxlen);
120 uint32_t bios_sigsearch(uint32_t start, u_char *sig, int siglen, int paralen,
122 void bios_add_smap_entries(struct bios_smap *smapbase, u_int32_t smapsize,
123 vm_paddr_t *physmap, int *physmap_idx);
126 #endif /* _MACHINE_PC_BIOS_H_ */