1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Copyright (C) 2015, Bin Meng <bmeng.cn@gmail.com>
4 *
5 * Adapted from coreboot src/arch/x86/smbios.c
6 */
7
8 #include <common.h>
9 #include <smbios.h>
10 #include <tables_csum.h>
11 #include <version.h>
12 #ifdef CONFIG_CPU
13 #include <cpu.h>
14 #include <dm.h>
15 #include <dm/uclass-internal.h>
16 #endif
17
18 /**
19 * smbios_add_string() - add a string to the string area
20 *
21 * This adds a string to the string area which is appended directly after
22 * the formatted portion of an SMBIOS structure.
23 *
24 * @start: string area start address
25 * @str: string to add
26 * @return: string number in the string area
27 */
smbios_add_string(char * start,const char * str)28 static int smbios_add_string(char *start, const char *str)
29 {
30 int i = 1;
31 char *p = start;
32
33 for (;;) {
34 if (!*p) {
35 strcpy(p, str);
36 p += strlen(str);
37 *p++ = '\0';
38 *p++ = '\0';
39
40 return i;
41 }
42
43 if (!strcmp(p, str))
44 return i;
45
46 p += strlen(p) + 1;
47 i++;
48 }
49 }
50
51 /**
52 * smbios_string_table_len() - compute the string area size
53 *
54 * This computes the size of the string area including the string terminator.
55 *
56 * @start: string area start address
57 * @return: string area size
58 */
smbios_string_table_len(char * start)59 static int smbios_string_table_len(char *start)
60 {
61 char *p = start;
62 int i, len = 0;
63
64 while (*p) {
65 i = strlen(p) + 1;
66 p += i;
67 len += i;
68 }
69
70 return len + 1;
71 }
72
smbios_write_type0(ulong * current,int handle)73 static int smbios_write_type0(ulong *current, int handle)
74 {
75 struct smbios_type0 *t = (struct smbios_type0 *)*current;
76 int len = sizeof(struct smbios_type0);
77
78 memset(t, 0, sizeof(struct smbios_type0));
79 fill_smbios_header(t, SMBIOS_BIOS_INFORMATION, len, handle);
80 t->vendor = smbios_add_string(t->eos, "U-Boot");
81 t->bios_ver = smbios_add_string(t->eos, PLAIN_VERSION);
82 t->bios_release_date = smbios_add_string(t->eos, U_BOOT_DMI_DATE);
83 #ifdef CONFIG_ROM_SIZE
84 t->bios_rom_size = (CONFIG_ROM_SIZE / 65536) - 1;
85 #endif
86 t->bios_characteristics = BIOS_CHARACTERISTICS_PCI_SUPPORTED |
87 BIOS_CHARACTERISTICS_SELECTABLE_BOOT |
88 BIOS_CHARACTERISTICS_UPGRADEABLE;
89 #ifdef CONFIG_GENERATE_ACPI_TABLE
90 t->bios_characteristics_ext1 = BIOS_CHARACTERISTICS_EXT1_ACPI;
91 #endif
92 #ifdef CONFIG_EFI_LOADER
93 t->bios_characteristics_ext1 |= BIOS_CHARACTERISTICS_EXT1_UEFI;
94 #endif
95 t->bios_characteristics_ext2 = BIOS_CHARACTERISTICS_EXT2_TARGET;
96
97 t->bios_major_release = 0xff;
98 t->bios_minor_release = 0xff;
99 t->ec_major_release = 0xff;
100 t->ec_minor_release = 0xff;
101
102 len = t->length + smbios_string_table_len(t->eos);
103 *current += len;
104
105 return len;
106 }
107
smbios_write_type1(ulong * current,int handle)108 static int smbios_write_type1(ulong *current, int handle)
109 {
110 struct smbios_type1 *t = (struct smbios_type1 *)*current;
111 int len = sizeof(struct smbios_type1);
112 char *serial_str = env_get("serial#");
113
114 memset(t, 0, sizeof(struct smbios_type1));
115 fill_smbios_header(t, SMBIOS_SYSTEM_INFORMATION, len, handle);
116 t->manufacturer = smbios_add_string(t->eos, CONFIG_SMBIOS_MANUFACTURER);
117 t->product_name = smbios_add_string(t->eos, CONFIG_SMBIOS_PRODUCT_NAME);
118 if (serial_str) {
119 strncpy((char*)t->uuid, serial_str, sizeof(t->uuid));
120 t->serial_number = smbios_add_string(t->eos, serial_str);
121 }
122
123 len = t->length + smbios_string_table_len(t->eos);
124 *current += len;
125
126 return len;
127 }
128
smbios_write_type2(ulong * current,int handle)129 static int smbios_write_type2(ulong *current, int handle)
130 {
131 struct smbios_type2 *t = (struct smbios_type2 *)*current;
132 int len = sizeof(struct smbios_type2);
133
134 memset(t, 0, sizeof(struct smbios_type2));
135 fill_smbios_header(t, SMBIOS_BOARD_INFORMATION, len, handle);
136 t->manufacturer = smbios_add_string(t->eos, CONFIG_SMBIOS_MANUFACTURER);
137 t->product_name = smbios_add_string(t->eos, CONFIG_SMBIOS_PRODUCT_NAME);
138 t->feature_flags = SMBIOS_BOARD_FEATURE_HOSTING;
139 t->board_type = SMBIOS_BOARD_MOTHERBOARD;
140
141 len = t->length + smbios_string_table_len(t->eos);
142 *current += len;
143
144 return len;
145 }
146
smbios_write_type3(ulong * current,int handle)147 static int smbios_write_type3(ulong *current, int handle)
148 {
149 struct smbios_type3 *t = (struct smbios_type3 *)*current;
150 int len = sizeof(struct smbios_type3);
151
152 memset(t, 0, sizeof(struct smbios_type3));
153 fill_smbios_header(t, SMBIOS_SYSTEM_ENCLOSURE, len, handle);
154 t->manufacturer = smbios_add_string(t->eos, CONFIG_SMBIOS_MANUFACTURER);
155 t->chassis_type = SMBIOS_ENCLOSURE_DESKTOP;
156 t->bootup_state = SMBIOS_STATE_SAFE;
157 t->power_supply_state = SMBIOS_STATE_SAFE;
158 t->thermal_state = SMBIOS_STATE_SAFE;
159 t->security_status = SMBIOS_SECURITY_NONE;
160
161 len = t->length + smbios_string_table_len(t->eos);
162 *current += len;
163
164 return len;
165 }
166
smbios_write_type4_dm(struct smbios_type4 * t)167 static void smbios_write_type4_dm(struct smbios_type4 *t)
168 {
169 u16 processor_family = SMBIOS_PROCESSOR_FAMILY_UNKNOWN;
170 const char *vendor = "Unknown";
171 const char *name = "Unknown";
172
173 #ifdef CONFIG_CPU
174 char processor_name[49];
175 char vendor_name[49];
176 struct udevice *dev = NULL;
177
178 uclass_find_first_device(UCLASS_CPU, &dev);
179 if (dev) {
180 struct cpu_platdata *plat = dev_get_parent_platdata(dev);
181
182 if (plat->family)
183 processor_family = plat->family;
184 t->processor_id[0] = plat->id[0];
185 t->processor_id[1] = plat->id[1];
186
187 if (!cpu_get_vendor(dev, vendor_name, sizeof(vendor_name)))
188 vendor = vendor_name;
189 if (!cpu_get_desc(dev, processor_name, sizeof(processor_name)))
190 name = processor_name;
191 }
192 #endif
193
194 t->processor_family = processor_family;
195 t->processor_manufacturer = smbios_add_string(t->eos, vendor);
196 t->processor_version = smbios_add_string(t->eos, name);
197 }
198
smbios_write_type4(ulong * current,int handle)199 static int smbios_write_type4(ulong *current, int handle)
200 {
201 struct smbios_type4 *t = (struct smbios_type4 *)*current;
202 int len = sizeof(struct smbios_type4);
203
204 memset(t, 0, sizeof(struct smbios_type4));
205 fill_smbios_header(t, SMBIOS_PROCESSOR_INFORMATION, len, handle);
206 t->processor_type = SMBIOS_PROCESSOR_TYPE_CENTRAL;
207 smbios_write_type4_dm(t);
208 t->status = SMBIOS_PROCESSOR_STATUS_ENABLED;
209 t->processor_upgrade = SMBIOS_PROCESSOR_UPGRADE_NONE;
210 t->l1_cache_handle = 0xffff;
211 t->l2_cache_handle = 0xffff;
212 t->l3_cache_handle = 0xffff;
213 t->processor_family2 = t->processor_family;
214
215 len = t->length + smbios_string_table_len(t->eos);
216 *current += len;
217
218 return len;
219 }
220
smbios_write_type32(ulong * current,int handle)221 static int smbios_write_type32(ulong *current, int handle)
222 {
223 struct smbios_type32 *t = (struct smbios_type32 *)*current;
224 int len = sizeof(struct smbios_type32);
225
226 memset(t, 0, sizeof(struct smbios_type32));
227 fill_smbios_header(t, SMBIOS_SYSTEM_BOOT_INFORMATION, len, handle);
228
229 *current += len;
230
231 return len;
232 }
233
smbios_write_type127(ulong * current,int handle)234 static int smbios_write_type127(ulong *current, int handle)
235 {
236 struct smbios_type127 *t = (struct smbios_type127 *)*current;
237 int len = sizeof(struct smbios_type127);
238
239 memset(t, 0, sizeof(struct smbios_type127));
240 fill_smbios_header(t, SMBIOS_END_OF_TABLE, len, handle);
241
242 *current += len;
243
244 return len;
245 }
246
247 static smbios_write_type smbios_write_funcs[] = {
248 smbios_write_type0,
249 smbios_write_type1,
250 smbios_write_type2,
251 smbios_write_type3,
252 smbios_write_type4,
253 smbios_write_type32,
254 smbios_write_type127
255 };
256
write_smbios_table(ulong addr)257 ulong write_smbios_table(ulong addr)
258 {
259 struct smbios_entry *se;
260 ulong tables;
261 int len = 0;
262 int max_struct_size = 0;
263 int handle = 0;
264 char *istart;
265 int isize;
266 int i;
267
268 /* 16 byte align the table address */
269 addr = ALIGN(addr, 16);
270
271 se = (struct smbios_entry *)(uintptr_t)addr;
272 memset(se, 0, sizeof(struct smbios_entry));
273
274 addr += sizeof(struct smbios_entry);
275 addr = ALIGN(addr, 16);
276 tables = addr;
277
278 /* populate minimum required tables */
279 for (i = 0; i < ARRAY_SIZE(smbios_write_funcs); i++) {
280 int tmp = smbios_write_funcs[i]((ulong *)&addr, handle++);
281 max_struct_size = max(max_struct_size, tmp);
282 len += tmp;
283 }
284
285 memcpy(se->anchor, "_SM_", 4);
286 se->length = sizeof(struct smbios_entry);
287 se->major_ver = SMBIOS_MAJOR_VER;
288 se->minor_ver = SMBIOS_MINOR_VER;
289 se->max_struct_size = max_struct_size;
290 memcpy(se->intermediate_anchor, "_DMI_", 5);
291 se->struct_table_length = len;
292 se->struct_table_address = tables;
293 se->struct_count = handle;
294
295 /* calculate checksums */
296 istart = (char *)se + SMBIOS_INTERMEDIATE_OFFSET;
297 isize = sizeof(struct smbios_entry) - SMBIOS_INTERMEDIATE_OFFSET;
298 se->intermediate_checksum = table_compute_checksum(istart, isize);
299 se->checksum = table_compute_checksum(se, sizeof(struct smbios_entry));
300
301 return addr;
302 }
303