uboot/lib/smbios.c
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   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
  19DECLARE_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 */
  31static 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 */
  62static 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
  76static int smbios_write_type0(ulong *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
 111static int smbios_write_type1(ulong *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
 132static int smbios_write_type2(ulong *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
 150static int smbios_write_type3(ulong *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
 170static 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
 202static int smbios_write_type4(ulong *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
 224static int smbios_write_type32(ulong *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
 237static int smbios_write_type127(ulong *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
 250static 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
 260ulong write_smbios_table(ulong addr)
 261{
 262        struct smbios_entry *se;
 263        ulong 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 *)(uintptr_t)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]((ulong *)&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