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 t->bios_rom_size = (CONFIG_ROM_SIZE / 65536) - 1; 87 t->bios_characteristics = BIOS_CHARACTERISTICS_PCI_SUPPORTED | 88 BIOS_CHARACTERISTICS_SELECTABLE_BOOT | 89 BIOS_CHARACTERISTICS_UPGRADEABLE; 90 #ifdef CONFIG_GENERATE_ACPI_TABLE 91 t->bios_characteristics_ext1 = BIOS_CHARACTERISTICS_EXT1_ACPI; 92 #endif 93 t->bios_characteristics_ext2 = BIOS_CHARACTERISTICS_EXT2_TARGET; 94 t->bios_major_release = 0xff; 95 t->bios_minor_release = 0xff; 96 t->ec_major_release = 0xff; 97 t->ec_minor_release = 0xff; 98 99 len = t->length + smbios_string_table_len(t->eos); 100 *current += len; 101 102 return len; 103 } 104 105 static int smbios_write_type1(uintptr_t *current, int handle) 106 { 107 struct smbios_type1 *t = (struct smbios_type1 *)*current; 108 int len = sizeof(struct smbios_type1); 109 110 memset(t, 0, sizeof(struct smbios_type1)); 111 fill_smbios_header(t, SMBIOS_SYSTEM_INFORMATION, len, handle); 112 t->manufacturer = smbios_add_string(t->eos, CONFIG_SMBIOS_MANUFACTURER); 113 t->product_name = smbios_add_string(t->eos, CONFIG_SMBIOS_PRODUCT_NAME); 114 115 len = t->length + smbios_string_table_len(t->eos); 116 *current += len; 117 118 return len; 119 } 120 121 static int smbios_write_type2(uintptr_t *current, int handle) 122 { 123 struct smbios_type2 *t = (struct smbios_type2 *)*current; 124 int len = sizeof(struct smbios_type2); 125 126 memset(t, 0, sizeof(struct smbios_type2)); 127 fill_smbios_header(t, SMBIOS_BOARD_INFORMATION, len, handle); 128 t->manufacturer = smbios_add_string(t->eos, CONFIG_SMBIOS_MANUFACTURER); 129 t->product_name = smbios_add_string(t->eos, CONFIG_SMBIOS_PRODUCT_NAME); 130 t->feature_flags = SMBIOS_BOARD_FEATURE_HOSTING; 131 t->board_type = SMBIOS_BOARD_MOTHERBOARD; 132 133 len = t->length + smbios_string_table_len(t->eos); 134 *current += len; 135 136 return len; 137 } 138 139 static int smbios_write_type3(uintptr_t *current, int handle) 140 { 141 struct smbios_type3 *t = (struct smbios_type3 *)*current; 142 int len = sizeof(struct smbios_type3); 143 144 memset(t, 0, sizeof(struct smbios_type3)); 145 fill_smbios_header(t, SMBIOS_SYSTEM_ENCLOSURE, len, handle); 146 t->manufacturer = smbios_add_string(t->eos, CONFIG_SMBIOS_MANUFACTURER); 147 t->chassis_type = SMBIOS_ENCLOSURE_DESKTOP; 148 t->bootup_state = SMBIOS_STATE_SAFE; 149 t->power_supply_state = SMBIOS_STATE_SAFE; 150 t->thermal_state = SMBIOS_STATE_SAFE; 151 t->security_status = SMBIOS_SECURITY_NONE; 152 153 len = t->length + smbios_string_table_len(t->eos); 154 *current += len; 155 156 return len; 157 } 158 159 static void smbios_write_type4_dm(struct smbios_type4 *t) 160 { 161 u16 processor_family = SMBIOS_PROCESSOR_FAMILY_UNKNOWN; 162 const char *vendor = "Unknown"; 163 const char *name = "Unknown"; 164 165 #ifdef CONFIG_CPU 166 char processor_name[49]; 167 char vendor_name[49]; 168 struct udevice *dev = NULL; 169 170 uclass_find_first_device(UCLASS_CPU, &dev); 171 if (dev) { 172 struct cpu_platdata *plat = dev_get_parent_platdata(dev); 173 174 if (plat->family) 175 processor_family = plat->family; 176 t->processor_id[0] = plat->id[0]; 177 t->processor_id[1] = plat->id[1]; 178 179 if (!cpu_get_vendor(dev, vendor_name, sizeof(vendor_name))) 180 vendor = vendor_name; 181 if (!cpu_get_desc(dev, processor_name, sizeof(processor_name))) 182 name = processor_name; 183 } 184 #endif 185 186 t->processor_family = processor_family; 187 t->processor_manufacturer = smbios_add_string(t->eos, vendor); 188 t->processor_version = smbios_add_string(t->eos, name); 189 } 190 191 static int smbios_write_type4(uintptr_t *current, int handle) 192 { 193 struct smbios_type4 *t = (struct smbios_type4 *)*current; 194 int len = sizeof(struct smbios_type4); 195 196 memset(t, 0, sizeof(struct smbios_type4)); 197 fill_smbios_header(t, SMBIOS_PROCESSOR_INFORMATION, len, handle); 198 t->processor_type = SMBIOS_PROCESSOR_TYPE_CENTRAL; 199 smbios_write_type4_dm(t); 200 t->status = SMBIOS_PROCESSOR_STATUS_ENABLED; 201 t->processor_upgrade = SMBIOS_PROCESSOR_UPGRADE_NONE; 202 t->l1_cache_handle = 0xffff; 203 t->l2_cache_handle = 0xffff; 204 t->l3_cache_handle = 0xffff; 205 t->processor_family2 = t->processor_family; 206 207 len = t->length + smbios_string_table_len(t->eos); 208 *current += len; 209 210 return len; 211 } 212 213 static int smbios_write_type32(uintptr_t *current, int handle) 214 { 215 struct smbios_type32 *t = (struct smbios_type32 *)*current; 216 int len = sizeof(struct smbios_type32); 217 218 memset(t, 0, sizeof(struct smbios_type32)); 219 fill_smbios_header(t, SMBIOS_SYSTEM_BOOT_INFORMATION, len, handle); 220 221 *current += len; 222 223 return len; 224 } 225 226 static int smbios_write_type127(uintptr_t *current, int handle) 227 { 228 struct smbios_type127 *t = (struct smbios_type127 *)*current; 229 int len = sizeof(struct smbios_type127); 230 231 memset(t, 0, sizeof(struct smbios_type127)); 232 fill_smbios_header(t, SMBIOS_END_OF_TABLE, len, handle); 233 234 *current += len; 235 236 return len; 237 } 238 239 static smbios_write_type smbios_write_funcs[] = { 240 smbios_write_type0, 241 smbios_write_type1, 242 smbios_write_type2, 243 smbios_write_type3, 244 smbios_write_type4, 245 smbios_write_type32, 246 smbios_write_type127 247 }; 248 249 uintptr_t write_smbios_table(uintptr_t addr) 250 { 251 struct smbios_entry *se; 252 u32 tables; 253 int len = 0; 254 int max_struct_size = 0; 255 int handle = 0; 256 char *istart; 257 int isize; 258 int i; 259 260 /* 16 byte align the table address */ 261 addr = ALIGN(addr, 16); 262 263 se = (struct smbios_entry *)addr; 264 memset(se, 0, sizeof(struct smbios_entry)); 265 266 addr += sizeof(struct smbios_entry); 267 addr = ALIGN(addr, 16); 268 tables = addr; 269 270 /* populate minimum required tables */ 271 for (i = 0; i < ARRAY_SIZE(smbios_write_funcs); i++) { 272 int tmp = smbios_write_funcs[i](&addr, handle++); 273 max_struct_size = max(max_struct_size, tmp); 274 len += tmp; 275 } 276 277 memcpy(se->anchor, "_SM_", 4); 278 se->length = sizeof(struct smbios_entry); 279 se->major_ver = SMBIOS_MAJOR_VER; 280 se->minor_ver = SMBIOS_MINOR_VER; 281 se->max_struct_size = max_struct_size; 282 memcpy(se->intermediate_anchor, "_DMI_", 5); 283 se->struct_table_length = len; 284 se->struct_table_address = tables; 285 se->struct_count = handle; 286 287 /* calculate checksums */ 288 istart = (char *)se + SMBIOS_INTERMEDIATE_OFFSET; 289 isize = sizeof(struct smbios_entry) - SMBIOS_INTERMEDIATE_OFFSET; 290 se->intermediate_checksum = table_compute_checksum(istart, isize); 291 se->checksum = table_compute_checksum(se, sizeof(struct smbios_entry)); 292 293 return addr; 294 } 295