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 char *serial_str = getenv("serial#"); 116 117 memset(t, 0, sizeof(struct smbios_type1)); 118 fill_smbios_header(t, SMBIOS_SYSTEM_INFORMATION, len, handle); 119 t->manufacturer = smbios_add_string(t->eos, CONFIG_SMBIOS_MANUFACTURER); 120 t->product_name = smbios_add_string(t->eos, CONFIG_SMBIOS_PRODUCT_NAME); 121 if (serial_str) { 122 strncpy((char*)t->uuid, serial_str, sizeof(t->uuid)); 123 t->serial_number = smbios_add_string(t->eos, serial_str); 124 } 125 126 len = t->length + smbios_string_table_len(t->eos); 127 *current += len; 128 129 return len; 130 } 131 132 static int smbios_write_type2(uintptr_t *current, int handle) 133 { 134 struct smbios_type2 *t = (struct smbios_type2 *)*current; 135 int len = sizeof(struct smbios_type2); 136 137 memset(t, 0, sizeof(struct smbios_type2)); 138 fill_smbios_header(t, SMBIOS_BOARD_INFORMATION, len, handle); 139 t->manufacturer = smbios_add_string(t->eos, CONFIG_SMBIOS_MANUFACTURER); 140 t->product_name = smbios_add_string(t->eos, CONFIG_SMBIOS_PRODUCT_NAME); 141 t->feature_flags = SMBIOS_BOARD_FEATURE_HOSTING; 142 t->board_type = SMBIOS_BOARD_MOTHERBOARD; 143 144 len = t->length + smbios_string_table_len(t->eos); 145 *current += len; 146 147 return len; 148 } 149 150 static int smbios_write_type3(uintptr_t *current, int handle) 151 { 152 struct smbios_type3 *t = (struct smbios_type3 *)*current; 153 int len = sizeof(struct smbios_type3); 154 155 memset(t, 0, sizeof(struct smbios_type3)); 156 fill_smbios_header(t, SMBIOS_SYSTEM_ENCLOSURE, len, handle); 157 t->manufacturer = smbios_add_string(t->eos, CONFIG_SMBIOS_MANUFACTURER); 158 t->chassis_type = SMBIOS_ENCLOSURE_DESKTOP; 159 t->bootup_state = SMBIOS_STATE_SAFE; 160 t->power_supply_state = SMBIOS_STATE_SAFE; 161 t->thermal_state = SMBIOS_STATE_SAFE; 162 t->security_status = SMBIOS_SECURITY_NONE; 163 164 len = t->length + smbios_string_table_len(t->eos); 165 *current += len; 166 167 return len; 168 } 169 170 static void smbios_write_type4_dm(struct smbios_type4 *t) 171 { 172 u16 processor_family = SMBIOS_PROCESSOR_FAMILY_UNKNOWN; 173 const char *vendor = "Unknown"; 174 const char *name = "Unknown"; 175 176 #ifdef CONFIG_CPU 177 char processor_name[49]; 178 char vendor_name[49]; 179 struct udevice *dev = NULL; 180 181 uclass_find_first_device(UCLASS_CPU, &dev); 182 if (dev) { 183 struct cpu_platdata *plat = dev_get_parent_platdata(dev); 184 185 if (plat->family) 186 processor_family = plat->family; 187 t->processor_id[0] = plat->id[0]; 188 t->processor_id[1] = plat->id[1]; 189 190 if (!cpu_get_vendor(dev, vendor_name, sizeof(vendor_name))) 191 vendor = vendor_name; 192 if (!cpu_get_desc(dev, processor_name, sizeof(processor_name))) 193 name = processor_name; 194 } 195 #endif 196 197 t->processor_family = processor_family; 198 t->processor_manufacturer = smbios_add_string(t->eos, vendor); 199 t->processor_version = smbios_add_string(t->eos, name); 200 } 201 202 static int smbios_write_type4(uintptr_t *current, int handle) 203 { 204 struct smbios_type4 *t = (struct smbios_type4 *)*current; 205 int len = sizeof(struct smbios_type4); 206 207 memset(t, 0, sizeof(struct smbios_type4)); 208 fill_smbios_header(t, SMBIOS_PROCESSOR_INFORMATION, len, handle); 209 t->processor_type = SMBIOS_PROCESSOR_TYPE_CENTRAL; 210 smbios_write_type4_dm(t); 211 t->status = SMBIOS_PROCESSOR_STATUS_ENABLED; 212 t->processor_upgrade = SMBIOS_PROCESSOR_UPGRADE_NONE; 213 t->l1_cache_handle = 0xffff; 214 t->l2_cache_handle = 0xffff; 215 t->l3_cache_handle = 0xffff; 216 t->processor_family2 = t->processor_family; 217 218 len = t->length + smbios_string_table_len(t->eos); 219 *current += len; 220 221 return len; 222 } 223 224 static int smbios_write_type32(uintptr_t *current, int handle) 225 { 226 struct smbios_type32 *t = (struct smbios_type32 *)*current; 227 int len = sizeof(struct smbios_type32); 228 229 memset(t, 0, sizeof(struct smbios_type32)); 230 fill_smbios_header(t, SMBIOS_SYSTEM_BOOT_INFORMATION, len, handle); 231 232 *current += len; 233 234 return len; 235 } 236 237 static int smbios_write_type127(uintptr_t *current, int handle) 238 { 239 struct smbios_type127 *t = (struct smbios_type127 *)*current; 240 int len = sizeof(struct smbios_type127); 241 242 memset(t, 0, sizeof(struct smbios_type127)); 243 fill_smbios_header(t, SMBIOS_END_OF_TABLE, len, handle); 244 245 *current += len; 246 247 return len; 248 } 249 250 static smbios_write_type smbios_write_funcs[] = { 251 smbios_write_type0, 252 smbios_write_type1, 253 smbios_write_type2, 254 smbios_write_type3, 255 smbios_write_type4, 256 smbios_write_type32, 257 smbios_write_type127 258 }; 259 260 uintptr_t write_smbios_table(uintptr_t addr) 261 { 262 struct smbios_entry *se; 263 u32 tables; 264 int len = 0; 265 int max_struct_size = 0; 266 int handle = 0; 267 char *istart; 268 int isize; 269 int i; 270 271 /* 16 byte align the table address */ 272 addr = ALIGN(addr, 16); 273 274 se = (struct smbios_entry *)addr; 275 memset(se, 0, sizeof(struct smbios_entry)); 276 277 addr += sizeof(struct smbios_entry); 278 addr = ALIGN(addr, 16); 279 tables = addr; 280 281 /* populate minimum required tables */ 282 for (i = 0; i < ARRAY_SIZE(smbios_write_funcs); i++) { 283 int tmp = smbios_write_funcs[i](&addr, handle++); 284 max_struct_size = max(max_struct_size, tmp); 285 len += tmp; 286 } 287 288 memcpy(se->anchor, "_SM_", 4); 289 se->length = sizeof(struct smbios_entry); 290 se->major_ver = SMBIOS_MAJOR_VER; 291 se->minor_ver = SMBIOS_MINOR_VER; 292 se->max_struct_size = max_struct_size; 293 memcpy(se->intermediate_anchor, "_DMI_", 5); 294 se->struct_table_length = len; 295 se->struct_table_address = tables; 296 se->struct_count = handle; 297 298 /* calculate checksums */ 299 istart = (char *)se + SMBIOS_INTERMEDIATE_OFFSET; 300 isize = sizeof(struct smbios_entry) - SMBIOS_INTERMEDIATE_OFFSET; 301 se->intermediate_checksum = table_compute_checksum(istart, isize); 302 se->checksum = table_compute_checksum(se, sizeof(struct smbios_entry)); 303 304 return addr; 305 } 306