1 /* SPDX-License-Identifier: GPL-2.0+ */
3 * Copyright (C) 2015, Bin Meng <bmeng.cn@gmail.com>
5 * Adapted from coreboot src/include/smbios.h
11 /* SMBIOS spec version implemented */
12 #define SMBIOS_MAJOR_VER 3
13 #define SMBIOS_MINOR_VER 0
15 /* SMBIOS structure types */
17 SMBIOS_BIOS_INFORMATION
= 0,
18 SMBIOS_SYSTEM_INFORMATION
= 1,
19 SMBIOS_BOARD_INFORMATION
= 2,
20 SMBIOS_SYSTEM_ENCLOSURE
= 3,
21 SMBIOS_PROCESSOR_INFORMATION
= 4,
22 SMBIOS_CACHE_INFORMATION
= 7,
23 SMBIOS_SYSTEM_SLOTS
= 9,
24 SMBIOS_PHYS_MEMORY_ARRAY
= 16,
25 SMBIOS_MEMORY_DEVICE
= 17,
26 SMBIOS_MEMORY_ARRAY_MAPPED_ADDRESS
= 19,
27 SMBIOS_SYSTEM_BOOT_INFORMATION
= 32,
28 SMBIOS_END_OF_TABLE
= 127
31 #define SMBIOS_INTERMEDIATE_OFFSET 16
32 #define SMBIOS_STRUCT_EOS_BYTES 2
34 struct __packed smbios_entry
{
43 u8 intermediate_anchor
[5];
44 u8 intermediate_checksum
;
45 u16 struct_table_length
;
46 u32 struct_table_address
;
51 /* BIOS characteristics */
52 #define BIOS_CHARACTERISTICS_PCI_SUPPORTED (1 << 7)
53 #define BIOS_CHARACTERISTICS_UPGRADEABLE (1 << 11)
54 #define BIOS_CHARACTERISTICS_SELECTABLE_BOOT (1 << 16)
56 #define BIOS_CHARACTERISTICS_EXT1_ACPI (1 << 0)
57 #define BIOS_CHARACTERISTICS_EXT1_UEFI (1 << 3)
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 #define SMBIOS_PROCESSOR_FAMILY_OTHER 1
143 #define SMBIOS_PROCESSOR_FAMILY_UNKNOWN 2
145 struct __packed smbios_type4
{
149 u8 socket_designation
;
152 u8 processor_manufacturer
;
154 u8 processor_version
;
160 u8 processor_upgrade
;
170 u16 processor_characteristics
;
171 u16 processor_family2
;
175 char eos
[SMBIOS_STRUCT_EOS_BYTES
];
178 struct __packed smbios_type32
{
184 u8 eos
[SMBIOS_STRUCT_EOS_BYTES
];
187 struct __packed smbios_type127
{
191 u8 eos
[SMBIOS_STRUCT_EOS_BYTES
];
194 struct __packed smbios_header
{
201 * fill_smbios_header() - Fill the header of an SMBIOS table
203 * This fills the header of an SMBIOS table structure.
205 * @table: start address of the structure
206 * @type: the type of structure
207 * @length: the length of the formatted area of the structure
208 * @handle: the structure's handle, a unique 16-bit number
210 static inline void fill_smbios_header(void *table
, int type
,
211 int length
, int handle
)
213 struct smbios_header
*header
= table
;
216 header
->length
= length
- SMBIOS_STRUCT_EOS_BYTES
;
217 header
->handle
= handle
;
221 * Function prototype to write a specific type of SMBIOS structure
223 * @addr: start address to write the structure
224 * @handle: the structure's handle, a unique 16-bit number
225 * @return: size of the structure
227 typedef int (*smbios_write_type
)(ulong
*addr
, int handle
);
230 * write_smbios_table() - Write SMBIOS table
232 * This writes SMBIOS table at a given address.
234 * @addr: start address to write SMBIOS table. If this is not
235 * 16-byte-aligned then it will be aligned before the table is written
236 * @return: end address of SMBIOS table (and start address for next entry)
238 ulong
write_smbios_table(ulong addr
);
240 #endif /* _SMBIOS_H_ */