1 /* 2 * Copyright (C) 2015, Bin Meng <bmeng.cn@gmail.com> 3 * 4 * Adapted from coreboot src/arch/x86/smbios.c 5 * 6 * SPDX-License-Identifier: GPL-2.0+ 7 */ 8 9 #include <common.h> 10 #include <smbios.h> 11 #include <tables_csum.h> 12 #include <version.h> 13 #ifdef CONFIG_CPU 14 #include <cpu.h> 15 #include <dm.h> 16 #include <dm/uclass-internal.h> 17 #endif 18 19 DECLARE_GLOBAL_DATA_PTR; 20 21 /** 22 * smbios_add_string() - add a string to the string area 23 * 24 * This adds a string to the string area which is appended directly after 25 * the formatted portion of an SMBIOS structure. 26 * 27 * @start: string area start address 28 * @str: string to add 29 * @return: string number in the string area 30 */ 31 static int smbios_add_string(char *start, const char *str) 32 { 33 int i = 1; 34 char *p = start; 35 36 for (;;) { 37 if (!*p) { 38 strcpy(p, str); 39 p += strlen(str); 40 *p++ = '\0'; 41 *p++ = '\0'; 42 43 return i; 44 } 45 46 if (!strcmp(p, str)) 47 return i; 48 49 p += strlen(p) + 1; 50 i++; 51 } 52 } 53 54 /** 55 * smbios_string_table_len() - compute the string area size 56 * 57 * This computes the size of the string area including the string terminator. 58 * 59 * @start: string area start address 60 * @return: string area size 61 */ 62 static int smbios_string_table_len(char *start) 63 { 64 char *p = start; 65 int i, len = 0; 66 67 while (*p) { 68 i = strlen(p) + 1; 69 p += i; 70 len += i; 71 } 72 73 return len + 1; 74 } 75 76 static int smbios_write_type0(uintptr_t *current, int handle) 77 { 78 struct smbios_type0 *t = (struct smbios_type0 *)*current; 79 int len = sizeof(struct smbios_type0); 80 81 memset(t, 0, sizeof(struct smbios_type0)); 82 fill_smbios_header(t, SMBIOS_BIOS_INFORMATION, len, handle); 83 t->vendor = smbios_add_string(t->eos, "U-Boot"); 84 t->bios_ver = smbios_add_string(t->eos, PLAIN_VERSION); 85 t->bios_release_date = smbios_add_string(t->eos, U_BOOT_DMI_DATE); 86 #ifdef CONFIG_ROM_SIZE 87 t->bios_rom_size = (CONFIG_ROM_SIZE / 65536) - 1; 88 #endif 89 t->bios_characteristics = BIOS_CHARACTERISTICS_PCI_SUPPORTED | 90 BIOS_CHARACTERISTICS_SELECTABLE_BOOT | 91 BIOS_CHARACTERISTICS_UPGRADEABLE; 92 #ifdef CONFIG_GENERATE_ACPI_TABLE 93 t->bios_characteristics_ext1 = BIOS_CHARACTERISTICS_EXT1_ACPI; 94 #endif 95 #ifdef CONFIG_EFI_LOADER 96 t->bios_characteristics_ext1 |= BIOS_CHARACTERISTICS_EXT1_UEFI; 97 #endif 98 t->bios_characteristics_ext2 = BIOS_CHARACTERISTICS_EXT2_TARGET; 99 100 t->bios_major_release = 0xff; 101 t->bios_minor_release = 0xff; 102 t->ec_major_release = 0xff; 103 t->ec_minor_release = 0xff; 104 105 len = t->length + smbios_string_table_len(t->eos); 106 *current += len; 107 108 return len; 109 } 110 111 static int smbios_write_type1(uintptr_t *current, int handle) 112 { 113 struct smbios_type1 *t = (struct smbios_type1 *)*current; 114 int len = sizeof(struct smbios_type1); 115 116 memset(t, 0, sizeof(struct smbios_type1)); 117 fill_smbios_header(t, SMBIOS_SYSTEM_INFORMATION, len, handle); 118 t->manufacturer = smbios_add_string(t->eos, CONFIG_SMBIOS_MANUFACTURER); 119 t->product_name = smbios_add_string(t->eos, CONFIG_SMBIOS_PRODUCT_NAME); 120 121 len = t->length + smbios_string_table_len(t->eos); 122 *current += len; 123 124 return len; 125 } 126 127 static int smbios_write_type2(uintptr_t *current, int handle) 128 { 129 struct smbios_type2 *t = (struct smbios_type2 *)*current; 130 int len = sizeof(struct smbios_type2); 131 132 memset(t, 0, sizeof(struct smbios_type2)); 133 fill_smbios_header(t, SMBIOS_BOARD_INFORMATION, len, handle); 134 t->manufacturer = smbios_add_string(t->eos, CONFIG_SMBIOS_MANUFACTURER); 135 t->product_name = smbios_add_string(t->eos, CONFIG_SMBIOS_PRODUCT_NAME); 136 t->feature_flags = SMBIOS_BOARD_FEATURE_HOSTING; 137 t->board_type = SMBIOS_BOARD_MOTHERBOARD; 138 139 len = t->length + smbios_string_table_len(t->eos); 140 *current += len; 141 142 return len; 143 } 144 145 static int smbios_write_type3(uintptr_t *current, int handle) 146 { 147 struct smbios_type3 *t = (struct smbios_type3 *)*current; 148 int len = sizeof(struct smbios_type3); 149 150 memset(t, 0, sizeof(struct smbios_type3)); 151 fill_smbios_header(t, SMBIOS_SYSTEM_ENCLOSURE, len, handle); 152 t->manufacturer = smbios_add_string(t->eos, CONFIG_SMBIOS_MANUFACTURER); 153 t->chassis_type = SMBIOS_ENCLOSURE_DESKTOP; 154 t->bootup_state = SMBIOS_STATE_SAFE; 155 t->power_supply_state = SMBIOS_STATE_SAFE; 156 t->thermal_state = SMBIOS_STATE_SAFE; 157 t->security_status = SMBIOS_SECURITY_NONE; 158 159 len = t->length + smbios_string_table_len(t->eos); 160 *current += len; 161 162 return len; 163 } 164 165 static void smbios_write_type4_dm(struct smbios_type4 *t) 166 { 167 u16 processor_family = SMBIOS_PROCESSOR_FAMILY_UNKNOWN; 168 const char *vendor = "Unknown"; 169 const char *name = "Unknown"; 170 171 #ifdef CONFIG_CPU 172 char processor_name[49]; 173 char vendor_name[49]; 174 struct udevice *dev = NULL; 175 176 uclass_find_first_device(UCLASS_CPU, &dev); 177 if (dev) { 178 struct cpu_platdata *plat = dev_get_parent_platdata(dev); 179 180 if (plat->family) 181 processor_family = plat->family; 182 t->processor_id[0] = plat->id[0]; 183 t->processor_id[1] = plat->id[1]; 184 185 if (!cpu_get_vendor(dev, vendor_name, sizeof(vendor_name))) 186 vendor = vendor_name; 187 if (!cpu_get_desc(dev, processor_name, sizeof(processor_name))) 188 name = processor_name; 189 } 190 #endif 191 192 t->processor_family = processor_family; 193 t->processor_manufacturer = smbios_add_string(t->eos, vendor); 194 t->processor_version = smbios_add_string(t->eos, name); 195 } 196 197 static int smbios_write_type4(uintptr_t *current, int handle) 198 { 199 struct smbios_type4 *t = (struct smbios_type4 *)*current; 200 int len = sizeof(struct smbios_type4); 201 202 memset(t, 0, sizeof(struct smbios_type4)); 203 fill_smbios_header(t, SMBIOS_PROCESSOR_INFORMATION, len, handle); 204 t->processor_type = SMBIOS_PROCESSOR_TYPE_CENTRAL; 205 smbios_write_type4_dm(t); 206 t->status = SMBIOS_PROCESSOR_STATUS_ENABLED; 207 t->processor_upgrade = SMBIOS_PROCESSOR_UPGRADE_NONE; 208 t->l1_cache_handle = 0xffff; 209 t->l2_cache_handle = 0xffff; 210 t->l3_cache_handle = 0xffff; 211 t->processor_family2 = t->processor_family; 212 213 len = t->length + smbios_string_table_len(t->eos); 214 *current += len; 215 216 return len; 217 } 218 219 static int smbios_write_type32(uintptr_t *current, int handle) 220 { 221 struct smbios_type32 *t = (struct smbios_type32 *)*current; 222 int len = sizeof(struct smbios_type32); 223 224 memset(t, 0, sizeof(struct smbios_type32)); 225 fill_smbios_header(t, SMBIOS_SYSTEM_BOOT_INFORMATION, len, handle); 226 227 *current += len; 228 229 return len; 230 } 231 232 static int smbios_write_type127(uintptr_t *current, int handle) 233 { 234 struct smbios_type127 *t = (struct smbios_type127 *)*current; 235 int len = sizeof(struct smbios_type127); 236 237 memset(t, 0, sizeof(struct smbios_type127)); 238 fill_smbios_header(t, SMBIOS_END_OF_TABLE, len, handle); 239 240 *current += len; 241 242 return len; 243 } 244 245 static smbios_write_type smbios_write_funcs[] = { 246 smbios_write_type0, 247 smbios_write_type1, 248 smbios_write_type2, 249 smbios_write_type3, 250 smbios_write_type4, 251 smbios_write_type32, 252 smbios_write_type127 253 }; 254 255 uintptr_t write_smbios_table(uintptr_t addr) 256 { 257 struct smbios_entry *se; 258 u32 tables; 259 int len = 0; 260 int max_struct_size = 0; 261 int handle = 0; 262 char *istart; 263 int isize; 264 int i; 265 266 /* 16 byte align the table address */ 267 addr = ALIGN(addr, 16); 268 269 se = (struct smbios_entry *)addr; 270 memset(se, 0, sizeof(struct smbios_entry)); 271 272 addr += sizeof(struct smbios_entry); 273 addr = ALIGN(addr, 16); 274 tables = addr; 275 276 /* populate minimum required tables */ 277 for (i = 0; i < ARRAY_SIZE(smbios_write_funcs); i++) { 278 int tmp = smbios_write_funcs[i](&addr, handle++); 279 max_struct_size = max(max_struct_size, tmp); 280 len += tmp; 281 } 282 283 memcpy(se->anchor, "_SM_", 4); 284 se->length = sizeof(struct smbios_entry); 285 se->major_ver = SMBIOS_MAJOR_VER; 286 se->minor_ver = SMBIOS_MINOR_VER; 287 se->max_struct_size = max_struct_size; 288 memcpy(se->intermediate_anchor, "_DMI_", 5); 289 se->struct_table_length = len; 290 se->struct_table_address = tables; 291 se->struct_count = handle; 292 293 /* calculate checksums */ 294 istart = (char *)se + SMBIOS_INTERMEDIATE_OFFSET; 295 isize = sizeof(struct smbios_entry) - SMBIOS_INTERMEDIATE_OFFSET; 296 se->intermediate_checksum = table_compute_checksum(istart, isize); 297 se->checksum = table_compute_checksum(se, sizeof(struct smbios_entry)); 298 299 return addr; 300 } 301