1 // SPDX-License-Identifier: GPL-2.0+
5 * Adapted from coreboot src/arch/x86/smbios.c
14 #include <tables_csum.h>
18 #include <dm/uclass-internal.h>
21 DECLARE_GLOBAL_DATA_PTR;
24 SMBIOS_STR_MAX = 64, /* Maximum length allowed for a string */
28 * struct smbios_ctx - context for writing SMBIOS tables
30 * @node: node containing the information to write (ofnode_null() if none)
31 * @dev: sysinfo device to use (NULL if none)
32 * @eos: end-of-string pointer for the table being processed. This is set
33 * up when we start processing a table
34 * @next_ptr: pointer to the start of the next string to be added. When the
35 * table is nopt empty, this points to the byte after the \0 of the
37 * @last_str: points to the last string that was written to the table, or NULL
49 * Function prototype to write a specific type of SMBIOS structure
51 * @addr: start address to write the structure
52 * @handle: the structure's handle, a unique 16-bit number
53 * @ctx: context for writing the tables
54 * @return: size of the structure
56 typedef int (*smbios_write_type)(ulong *addr, int handle,
57 struct smbios_ctx *ctx);
60 * struct smbios_write_method - Information about a table-writing function
62 * @write: Function to call
63 * @subnode_name: Name of subnode which has the information for this function,
66 struct smbios_write_method {
67 smbios_write_type write;
68 const char *subnode_name;
72 * smbios_add_string() - add a string to the string area
74 * This adds a string to the string area which is appended directly after
75 * the formatted portion of an SMBIOS structure.
77 * @ctx: SMBIOS context
79 * @return: string number in the string area (1 or more)
81 static int smbios_add_string(struct smbios_ctx *ctx, const char *str)
101 if (!strcmp(p, str)) {
112 * smbios_add_prop_si() - Add a property from the devicetree or sysinfo
114 * Sysinfo is used if available, with a fallback to devicetree
116 * @ctx: context for writing the tables
117 * @prop: property to write
118 * @return 0 if not found, else SMBIOS string number (1 or more)
120 static int smbios_add_prop_si(struct smbios_ctx *ctx, const char *prop,
123 if (sysinfo_id && ctx->dev) {
124 char val[SMBIOS_STR_MAX];
127 ret = sysinfo_get_str(ctx->dev, sysinfo_id, sizeof(val), val);
129 return smbios_add_string(ctx, val);
131 if (IS_ENABLED(CONFIG_OF_CONTROL)) {
134 str = ofnode_read_string(ctx->node, prop);
136 return smbios_add_string(ctx, str);
143 * smbios_add_prop() - Add a property from the devicetree
145 * @prop: property to write
146 * @return 0 if not found, else SMBIOS string number (1 or more)
148 static int smbios_add_prop(struct smbios_ctx *ctx, const char *prop)
150 return smbios_add_prop_si(ctx, prop, SYSINFO_ID_NONE);
153 static void smbios_set_eos(struct smbios_ctx *ctx, char *eos)
157 ctx->last_str = NULL;
160 int smbios_update_version(const char *version)
162 char *ptr = gd->smbios_version;
166 return log_ret(-ENOENT);
169 * This string is supposed to have at least enough bytes and is
170 * padded with spaces. Update it, taking care not to move the
171 * \0 terminator, so that other strings in the string table
172 * are not disturbed. See smbios_add_string()
174 old_len = strnlen(ptr, SMBIOS_STR_MAX);
175 len = strnlen(version, SMBIOS_STR_MAX);
177 return log_ret(-ENOSPC);
179 log_debug("Replacing SMBIOS type 0 version string '%s'\n", ptr);
180 memcpy(ptr, version, len);
182 print_buffer((ulong)ptr, ptr, 1, old_len + 1, 0);
189 * smbios_string_table_len() - compute the string area size
191 * This computes the size of the string area including the string terminator.
193 * @ctx: SMBIOS context
194 * @return: string area size
196 static int smbios_string_table_len(const struct smbios_ctx *ctx)
198 /* Allow for the final \0 after all strings */
199 return (ctx->next_ptr + 1) - ctx->eos;
202 static int smbios_write_type0(ulong *current, int handle,
203 struct smbios_ctx *ctx)
205 struct smbios_type0 *t;
206 int len = sizeof(struct smbios_type0);
208 t = map_sysmem(*current, len);
209 memset(t, 0, sizeof(struct smbios_type0));
210 fill_smbios_header(t, SMBIOS_BIOS_INFORMATION, len, handle);
211 smbios_set_eos(ctx, t->eos);
212 t->vendor = smbios_add_string(ctx, "U-Boot");
214 t->bios_ver = smbios_add_prop(ctx, "version");
216 t->bios_ver = smbios_add_string(ctx, PLAIN_VERSION);
218 gd->smbios_version = ctx->last_str;
219 log_debug("smbios_version = %p: '%s'\n", gd->smbios_version,
222 print_buffer((ulong)gd->smbios_version, gd->smbios_version,
223 1, strlen(gd->smbios_version) + 1, 0);
225 t->bios_release_date = smbios_add_string(ctx, U_BOOT_DMI_DATE);
226 #ifdef CONFIG_ROM_SIZE
227 t->bios_rom_size = (CONFIG_ROM_SIZE / 65536) - 1;
229 t->bios_characteristics = BIOS_CHARACTERISTICS_PCI_SUPPORTED |
230 BIOS_CHARACTERISTICS_SELECTABLE_BOOT |
231 BIOS_CHARACTERISTICS_UPGRADEABLE;
232 #ifdef CONFIG_GENERATE_ACPI_TABLE
233 t->bios_characteristics_ext1 = BIOS_CHARACTERISTICS_EXT1_ACPI;
235 #ifdef CONFIG_EFI_LOADER
236 t->bios_characteristics_ext1 |= BIOS_CHARACTERISTICS_EXT1_UEFI;
238 t->bios_characteristics_ext2 = BIOS_CHARACTERISTICS_EXT2_TARGET;
240 /* bios_major_release has only one byte, so drop century */
241 t->bios_major_release = U_BOOT_VERSION_NUM % 100;
242 t->bios_minor_release = U_BOOT_VERSION_NUM_PATCH;
243 t->ec_major_release = 0xff;
244 t->ec_minor_release = 0xff;
246 len = t->length + smbios_string_table_len(ctx);
253 static int smbios_write_type1(ulong *current, int handle,
254 struct smbios_ctx *ctx)
256 struct smbios_type1 *t;
257 int len = sizeof(struct smbios_type1);
258 char *serial_str = env_get("serial#");
260 t = map_sysmem(*current, len);
261 memset(t, 0, sizeof(struct smbios_type1));
262 fill_smbios_header(t, SMBIOS_SYSTEM_INFORMATION, len, handle);
263 smbios_set_eos(ctx, t->eos);
264 t->manufacturer = smbios_add_prop(ctx, "manufacturer");
265 t->product_name = smbios_add_prop(ctx, "product");
266 t->version = smbios_add_prop_si(ctx, "version",
267 SYSINFO_ID_SMBIOS_SYSTEM_VERSION);
269 t->serial_number = smbios_add_string(ctx, serial_str);
270 strncpy((char *)t->uuid, serial_str, sizeof(t->uuid));
272 t->serial_number = smbios_add_prop(ctx, "serial");
274 t->sku_number = smbios_add_prop(ctx, "sku");
275 t->family = smbios_add_prop(ctx, "family");
277 len = t->length + smbios_string_table_len(ctx);
284 static int smbios_write_type2(ulong *current, int handle,
285 struct smbios_ctx *ctx)
287 struct smbios_type2 *t;
288 int len = sizeof(struct smbios_type2);
290 t = map_sysmem(*current, len);
291 memset(t, 0, sizeof(struct smbios_type2));
292 fill_smbios_header(t, SMBIOS_BOARD_INFORMATION, len, handle);
293 smbios_set_eos(ctx, t->eos);
294 t->manufacturer = smbios_add_prop(ctx, "manufacturer");
295 t->product_name = smbios_add_prop(ctx, "product");
296 t->version = smbios_add_prop_si(ctx, "version",
297 SYSINFO_ID_SMBIOS_BASEBOARD_VERSION);
298 t->asset_tag_number = smbios_add_prop(ctx, "asset-tag");
299 t->feature_flags = SMBIOS_BOARD_FEATURE_HOSTING;
300 t->board_type = SMBIOS_BOARD_MOTHERBOARD;
302 len = t->length + smbios_string_table_len(ctx);
309 static int smbios_write_type3(ulong *current, int handle,
310 struct smbios_ctx *ctx)
312 struct smbios_type3 *t;
313 int len = sizeof(struct smbios_type3);
315 t = map_sysmem(*current, len);
316 memset(t, 0, sizeof(struct smbios_type3));
317 fill_smbios_header(t, SMBIOS_SYSTEM_ENCLOSURE, len, handle);
318 smbios_set_eos(ctx, t->eos);
319 t->manufacturer = smbios_add_prop(ctx, "manufacturer");
320 t->chassis_type = SMBIOS_ENCLOSURE_DESKTOP;
321 t->bootup_state = SMBIOS_STATE_SAFE;
322 t->power_supply_state = SMBIOS_STATE_SAFE;
323 t->thermal_state = SMBIOS_STATE_SAFE;
324 t->security_status = SMBIOS_SECURITY_NONE;
326 len = t->length + smbios_string_table_len(ctx);
333 static void smbios_write_type4_dm(struct smbios_type4 *t,
334 struct smbios_ctx *ctx)
336 u16 processor_family = SMBIOS_PROCESSOR_FAMILY_UNKNOWN;
337 const char *vendor = "Unknown";
338 const char *name = "Unknown";
341 char processor_name[49];
342 char vendor_name[49];
343 struct udevice *cpu = NULL;
345 uclass_find_first_device(UCLASS_CPU, &cpu);
347 struct cpu_plat *plat = dev_get_parent_plat(cpu);
350 processor_family = plat->family;
351 t->processor_id[0] = plat->id[0];
352 t->processor_id[1] = plat->id[1];
354 if (!cpu_get_vendor(cpu, vendor_name, sizeof(vendor_name)))
355 vendor = vendor_name;
356 if (!cpu_get_desc(cpu, processor_name, sizeof(processor_name)))
357 name = processor_name;
361 t->processor_family = processor_family;
362 t->processor_manufacturer = smbios_add_string(ctx, vendor);
363 t->processor_version = smbios_add_string(ctx, name);
366 static int smbios_write_type4(ulong *current, int handle,
367 struct smbios_ctx *ctx)
369 struct smbios_type4 *t;
370 int len = sizeof(struct smbios_type4);
372 t = map_sysmem(*current, len);
373 memset(t, 0, sizeof(struct smbios_type4));
374 fill_smbios_header(t, SMBIOS_PROCESSOR_INFORMATION, len, handle);
375 smbios_set_eos(ctx, t->eos);
376 t->processor_type = SMBIOS_PROCESSOR_TYPE_CENTRAL;
377 smbios_write_type4_dm(t, ctx);
378 t->status = SMBIOS_PROCESSOR_STATUS_ENABLED;
379 t->processor_upgrade = SMBIOS_PROCESSOR_UPGRADE_NONE;
380 t->l1_cache_handle = 0xffff;
381 t->l2_cache_handle = 0xffff;
382 t->l3_cache_handle = 0xffff;
383 t->processor_family2 = t->processor_family;
385 len = t->length + smbios_string_table_len(ctx);
392 static int smbios_write_type32(ulong *current, int handle,
393 struct smbios_ctx *ctx)
395 struct smbios_type32 *t;
396 int len = sizeof(struct smbios_type32);
398 t = map_sysmem(*current, len);
399 memset(t, 0, sizeof(struct smbios_type32));
400 fill_smbios_header(t, SMBIOS_SYSTEM_BOOT_INFORMATION, len, handle);
401 smbios_set_eos(ctx, t->eos);
409 static int smbios_write_type127(ulong *current, int handle,
410 struct smbios_ctx *ctx)
412 struct smbios_type127 *t;
413 int len = sizeof(struct smbios_type127);
415 t = map_sysmem(*current, len);
416 memset(t, 0, sizeof(struct smbios_type127));
417 fill_smbios_header(t, SMBIOS_END_OF_TABLE, len, handle);
425 static struct smbios_write_method smbios_write_funcs[] = {
426 { smbios_write_type0, "bios", },
427 { smbios_write_type1, "system", },
428 { smbios_write_type2, "baseboard", },
429 { smbios_write_type3, "chassis", },
430 { smbios_write_type4, },
431 { smbios_write_type32, },
432 { smbios_write_type127 },
435 ulong write_smbios_table(ulong addr)
437 ofnode parent_node = ofnode_null();
438 struct smbios_entry *se;
439 struct smbios_ctx ctx;
443 int max_struct_size = 0;
449 ctx.node = ofnode_null();
450 if (IS_ENABLED(CONFIG_OF_CONTROL)) {
451 uclass_first_device(UCLASS_SYSINFO, &ctx.dev);
453 parent_node = dev_read_subnode(ctx.dev, "smbios");
458 /* 16 byte align the table address */
459 addr = ALIGN(addr, 16);
461 se = map_sysmem(addr, sizeof(struct smbios_entry));
462 memset(se, 0, sizeof(struct smbios_entry));
464 addr += sizeof(struct smbios_entry);
465 addr = ALIGN(addr, 16);
468 /* populate minimum required tables */
469 for (i = 0; i < ARRAY_SIZE(smbios_write_funcs); i++) {
470 const struct smbios_write_method *method;
473 method = &smbios_write_funcs[i];
474 if (IS_ENABLED(CONFIG_OF_CONTROL) && method->subnode_name)
475 ctx.node = ofnode_find_subnode(parent_node,
476 method->subnode_name);
477 tmp = method->write((ulong *)&addr, handle++, &ctx);
479 max_struct_size = max(max_struct_size, tmp);
483 memcpy(se->anchor, "_SM_", 4);
484 se->length = sizeof(struct smbios_entry);
485 se->major_ver = SMBIOS_MAJOR_VER;
486 se->minor_ver = SMBIOS_MINOR_VER;
487 se->max_struct_size = max_struct_size;
488 memcpy(se->intermediate_anchor, "_DMI_", 5);
489 se->struct_table_length = len;
492 * We must use a pointer here so things work correctly on sandbox. The
493 * user of this table is not aware of the mapping of addresses to
494 * sandbox's DRAM buffer.
496 table_addr = (ulong)map_sysmem(tables, 0);
497 if (sizeof(table_addr) > sizeof(u32) && table_addr > (ulong)UINT_MAX) {
499 * We need to put this >32-bit pointer into the table but the
500 * field is only 32 bits wide.
502 printf("WARNING: SMBIOS table_address overflow %llx\n",
503 (unsigned long long)table_addr);
506 se->struct_table_address = table_addr;
508 se->struct_count = handle;
510 /* calculate checksums */
511 istart = (char *)se + SMBIOS_INTERMEDIATE_OFFSET;
512 isize = sizeof(struct smbios_entry) - SMBIOS_INTERMEDIATE_OFFSET;
513 se->intermediate_checksum = table_compute_checksum(istart, isize);
514 se->checksum = table_compute_checksum(se, sizeof(struct smbios_entry));