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1 /* SPDX-License-Identifier: GPL-2.0+ */
2 /*
3  * Copyright (C) 2015, Bin Meng <bmeng.cn@gmail.com>
4  *
5  * Adapted from coreboot src/include/smbios.h
6  */
7 
8 #ifndef _SMBIOS_H_
9 #define _SMBIOS_H_
10 
11 /* SMBIOS spec version implemented */
12 #define SMBIOS_MAJOR_VER	3
13 #define SMBIOS_MINOR_VER	0
14 
15 /* SMBIOS structure types */
16 enum {
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
29 };
30 
31 #define SMBIOS_INTERMEDIATE_OFFSET	16
32 #define SMBIOS_STRUCT_EOS_BYTES		2
33 
34 struct __packed smbios_entry {
35 	u8 anchor[4];
36 	u8 checksum;
37 	u8 length;
38 	u8 major_ver;
39 	u8 minor_ver;
40 	u16 max_struct_size;
41 	u8 entry_point_rev;
42 	u8 formatted_area[5];
43 	u8 intermediate_anchor[5];
44 	u8 intermediate_checksum;
45 	u16 struct_table_length;
46 	u32 struct_table_address;
47 	u16 struct_count;
48 	u8 bcd_rev;
49 };
50 
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)
55 
56 #define BIOS_CHARACTERISTICS_EXT1_ACPI		(1 << 0)
57 #define BIOS_CHARACTERISTICS_EXT1_UEFI		(1 << 3)
58 #define BIOS_CHARACTERISTICS_EXT2_TARGET	(1 << 2)
59 
60 struct __packed smbios_type0 {
61 	u8 type;
62 	u8 length;
63 	u16 handle;
64 	u8 vendor;
65 	u8 bios_ver;
66 	u16 bios_start_segment;
67 	u8 bios_release_date;
68 	u8 bios_rom_size;
69 	u64 bios_characteristics;
70 	u8 bios_characteristics_ext1;
71 	u8 bios_characteristics_ext2;
72 	u8 bios_major_release;
73 	u8 bios_minor_release;
74 	u8 ec_major_release;
75 	u8 ec_minor_release;
76 	char eos[SMBIOS_STRUCT_EOS_BYTES];
77 };
78 
79 struct __packed smbios_type1 {
80 	u8 type;
81 	u8 length;
82 	u16 handle;
83 	u8 manufacturer;
84 	u8 product_name;
85 	u8 version;
86 	u8 serial_number;
87 	u8 uuid[16];
88 	u8 wakeup_type;
89 	u8 sku_number;
90 	u8 family;
91 	char eos[SMBIOS_STRUCT_EOS_BYTES];
92 };
93 
94 #define SMBIOS_BOARD_FEATURE_HOSTING	(1 << 0)
95 #define SMBIOS_BOARD_MOTHERBOARD	10
96 
97 struct __packed smbios_type2 {
98 	u8 type;
99 	u8 length;
100 	u16 handle;
101 	u8 manufacturer;
102 	u8 product_name;
103 	u8 version;
104 	u8 serial_number;
105 	u8 asset_tag_number;
106 	u8 feature_flags;
107 	u8 chassis_location;
108 	u16 chassis_handle;
109 	u8 board_type;
110 	char eos[SMBIOS_STRUCT_EOS_BYTES];
111 };
112 
113 #define SMBIOS_ENCLOSURE_DESKTOP	3
114 #define SMBIOS_STATE_SAFE		3
115 #define SMBIOS_SECURITY_NONE		3
116 
117 struct __packed smbios_type3 {
118 	u8 type;
119 	u8 length;
120 	u16 handle;
121 	u8 manufacturer;
122 	u8 chassis_type;
123 	u8 version;
124 	u8 serial_number;
125 	u8 asset_tag_number;
126 	u8 bootup_state;
127 	u8 power_supply_state;
128 	u8 thermal_state;
129 	u8 security_status;
130 	u32 oem_defined;
131 	u8 height;
132 	u8 number_of_power_cords;
133 	u8 element_count;
134 	u8 element_record_length;
135 	char eos[SMBIOS_STRUCT_EOS_BYTES];
136 };
137 
138 #define SMBIOS_PROCESSOR_TYPE_CENTRAL	3
139 #define SMBIOS_PROCESSOR_STATUS_ENABLED	1
140 #define SMBIOS_PROCESSOR_UPGRADE_NONE	6
141 
142 #define SMBIOS_PROCESSOR_FAMILY_OTHER	1
143 #define SMBIOS_PROCESSOR_FAMILY_UNKNOWN	2
144 
145 struct __packed smbios_type4 {
146 	u8 type;
147 	u8 length;
148 	u16 handle;
149 	u8 socket_designation;
150 	u8 processor_type;
151 	u8 processor_family;
152 	u8 processor_manufacturer;
153 	u32 processor_id[2];
154 	u8 processor_version;
155 	u8 voltage;
156 	u16 external_clock;
157 	u16 max_speed;
158 	u16 current_speed;
159 	u8 status;
160 	u8 processor_upgrade;
161 	u16 l1_cache_handle;
162 	u16 l2_cache_handle;
163 	u16 l3_cache_handle;
164 	u8 serial_number;
165 	u8 asset_tag;
166 	u8 part_number;
167 	u8 core_count;
168 	u8 core_enabled;
169 	u8 thread_count;
170 	u16 processor_characteristics;
171 	u16 processor_family2;
172 	u16 core_count2;
173 	u16 core_enabled2;
174 	u16 thread_count2;
175 	char eos[SMBIOS_STRUCT_EOS_BYTES];
176 };
177 
178 struct __packed smbios_type32 {
179 	u8 type;
180 	u8 length;
181 	u16 handle;
182 	u8 reserved[6];
183 	u8 boot_status;
184 	u8 eos[SMBIOS_STRUCT_EOS_BYTES];
185 };
186 
187 struct __packed smbios_type127 {
188 	u8 type;
189 	u8 length;
190 	u16 handle;
191 	u8 eos[SMBIOS_STRUCT_EOS_BYTES];
192 };
193 
194 struct __packed smbios_header {
195 	u8 type;
196 	u8 length;
197 	u16 handle;
198 };
199 
200 /**
201  * fill_smbios_header() - Fill the header of an SMBIOS table
202  *
203  * This fills the header of an SMBIOS table structure.
204  *
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
209  */
fill_smbios_header(void * table,int type,int length,int handle)210 static inline void fill_smbios_header(void *table, int type,
211 				      int length, int handle)
212 {
213 	struct smbios_header *header = table;
214 
215 	header->type = type;
216 	header->length = length - SMBIOS_STRUCT_EOS_BYTES;
217 	header->handle = handle;
218 }
219 
220 /**
221  * Function prototype to write a specific type of SMBIOS structure
222  *
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
226  */
227 typedef int (*smbios_write_type)(ulong *addr, int handle);
228 
229 /**
230  * write_smbios_table() - Write SMBIOS table
231  *
232  * This writes SMBIOS table at a given address.
233  *
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)
237  */
238 ulong write_smbios_table(ulong addr);
239 
240 #endif /* _SMBIOS_H_ */
241