2 * Copyright (C) 2015, Bin Meng <bmeng.cn@gmail.com>
4 * Adapted from coreboot src/include/smbios.h
6 * SPDX-License-Identifier: GPL-2.0+
12 /* SMBIOS spec version implemented */
13 #define SMBIOS_MAJOR_VER 3
14 #define SMBIOS_MINOR_VER 0
16 /* SMBIOS structure types */
18 SMBIOS_BIOS_INFORMATION = 0,
19 SMBIOS_SYSTEM_INFORMATION = 1,
20 SMBIOS_BOARD_INFORMATION = 2,
21 SMBIOS_SYSTEM_ENCLOSURE = 3,
22 SMBIOS_PROCESSOR_INFORMATION = 4,
23 SMBIOS_CACHE_INFORMATION = 7,
24 SMBIOS_SYSTEM_SLOTS = 9,
25 SMBIOS_PHYS_MEMORY_ARRAY = 16,
26 SMBIOS_MEMORY_DEVICE = 17,
27 SMBIOS_MEMORY_ARRAY_MAPPED_ADDRESS = 19,
28 SMBIOS_SYSTEM_BOOT_INFORMATION = 32,
29 SMBIOS_END_OF_TABLE = 127
32 #define SMBIOS_INTERMEDIATE_OFFSET 16
33 #define SMBIOS_STRUCT_EOS_BYTES 2
35 struct __packed smbios_entry {
44 u8 intermediate_anchor[5];
45 u8 intermediate_checksum;
46 u16 struct_table_length;
47 u32 struct_table_address;
52 /* BIOS characteristics */
53 #define BIOS_CHARACTERISTICS_PCI_SUPPORTED (1 << 7)
54 #define BIOS_CHARACTERISTICS_UPGRADEABLE (1 << 11)
55 #define BIOS_CHARACTERISTICS_SELECTABLE_BOOT (1 << 16)
57 #define BIOS_CHARACTERISTICS_EXT1_ACPI (1 << 0)
58 #define BIOS_CHARACTERISTICS_EXT2_TARGET (1 << 2)
60 struct __packed smbios_type0 {
66 u16 bios_start_segment;
69 u64 bios_characteristics;
70 u8 bios_characteristics_ext1;
71 u8 bios_characteristics_ext2;
72 u8 bios_major_release;
73 u8 bios_minor_release;
76 char eos[SMBIOS_STRUCT_EOS_BYTES];
79 struct __packed smbios_type1 {
91 char eos[SMBIOS_STRUCT_EOS_BYTES];
94 #define SMBIOS_BOARD_FEATURE_HOSTING (1 << 0)
95 #define SMBIOS_BOARD_MOTHERBOARD 10
97 struct __packed smbios_type2 {
110 char eos[SMBIOS_STRUCT_EOS_BYTES];
113 #define SMBIOS_ENCLOSURE_DESKTOP 3
114 #define SMBIOS_STATE_SAFE 3
115 #define SMBIOS_SECURITY_NONE 3
117 struct __packed smbios_type3 {
127 u8 power_supply_state;
132 u8 number_of_power_cords;
134 u8 element_record_length;
135 char eos[SMBIOS_STRUCT_EOS_BYTES];
138 #define SMBIOS_PROCESSOR_TYPE_CENTRAL 3
139 #define SMBIOS_PROCESSOR_STATUS_ENABLED 1
140 #define SMBIOS_PROCESSOR_UPGRADE_NONE 6
142 struct __packed smbios_type4 {
146 u8 socket_designation;
149 u8 processor_manufacturer;
151 u8 processor_version;
157 u8 processor_upgrade;
167 u16 processor_characteristics;
168 u16 processor_family2;
172 char eos[SMBIOS_STRUCT_EOS_BYTES];
175 struct __packed smbios_type32 {
181 u8 eos[SMBIOS_STRUCT_EOS_BYTES];
184 struct __packed smbios_type127 {
188 u8 eos[SMBIOS_STRUCT_EOS_BYTES];
191 struct __packed smbios_header {
198 * fill_smbios_header() - Fill the header of an SMBIOS table
200 * This fills the header of an SMBIOS table structure.
202 * @table: start address of the structure
203 * @type: the type of structure
204 * @length: the length of the formatted area of the structure
205 * @handle: the structure's handle, a unique 16-bit number
207 static inline void fill_smbios_header(void *table, int type,
208 int length, int handle)
210 struct smbios_header *header = table;
213 header->length = length - SMBIOS_STRUCT_EOS_BYTES;
214 header->handle = handle;
218 * Function prototype to write a specific type of SMBIOS structure
220 * @addr: start address to write the structure
221 * @handle: the structure's handle, a unique 16-bit number
222 * @return: size of the structure
224 typedef int (*smbios_write_type)(u32 *addr, int handle);
227 * write_smbios_table() - Write SMBIOS table
229 * This writes SMBIOS table at a given address.
231 * @addr: start address to write SMBIOS table
232 * @return: end address of SMBIOS table
234 u32 write_smbios_table(u32 addr);
236 #endif /* _SMBIOS_H_ */