1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright (C) 2015, Bin Meng <bmeng.cn@gmail.com>
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 * struct smbios_ctx - context for writing SMBIOS tables
26 * @node: node containing the information to write (ofnode_null() if none)
27 * @dev: sysinfo device to use (NULL if none)
28 * @eos: end-of-string pointer for the table being processed. This is set
29 * up when we start processing a table
30 * @next_ptr: pointer to the start of the next string to be added. When the
31 * table is nopt empty, this points to the byte after the \0 of the
33 * @last_str: points to the last string that was written to the table, or NULL
45 * Function prototype to write a specific type of SMBIOS structure
47 * @addr: start address to write the structure
48 * @handle: the structure's handle, a unique 16-bit number
49 * @ctx: context for writing the tables
50 * Return: size of the structure
52 typedef int (*smbios_write_type)(ulong *addr, int handle,
53 struct smbios_ctx *ctx);
56 * struct smbios_write_method - Information about a table-writing function
58 * @write: Function to call
59 * @subnode_name: Name of subnode which has the information for this function,
62 struct smbios_write_method {
63 smbios_write_type write;
64 const char *subnode_name;
68 * smbios_add_string() - add a string to the string area
70 * This adds a string to the string area which is appended directly after
71 * the formatted portion of an SMBIOS structure.
73 * @ctx: SMBIOS context
75 * Return: string number in the string area (1 or more)
77 static int smbios_add_string(struct smbios_ctx *ctx, const char *str)
97 if (!strcmp(p, str)) {
108 * smbios_add_prop_si() - Add a property from the devicetree or sysinfo
110 * Sysinfo is used if available, with a fallback to devicetree
112 * @ctx: context for writing the tables
113 * @prop: property to write
114 * Return: 0 if not found, else SMBIOS string number (1 or more)
116 static int smbios_add_prop_si(struct smbios_ctx *ctx, const char *prop,
119 if (sysinfo_id && ctx->dev) {
120 char val[SMBIOS_STR_MAX];
123 ret = sysinfo_get_str(ctx->dev, sysinfo_id, sizeof(val), val);
125 return smbios_add_string(ctx, val);
127 if (IS_ENABLED(CONFIG_OF_CONTROL)) {
130 str = ofnode_read_string(ctx->node, prop);
132 return smbios_add_string(ctx, str);
139 * smbios_add_prop() - Add a property from the devicetree
141 * @prop: property to write
142 * Return: 0 if not found, else SMBIOS string number (1 or more)
144 static int smbios_add_prop(struct smbios_ctx *ctx, const char *prop)
146 return smbios_add_prop_si(ctx, prop, SYSINFO_ID_NONE);
149 static void smbios_set_eos(struct smbios_ctx *ctx, char *eos)
153 ctx->last_str = NULL;
156 int smbios_update_version(const char *version)
158 char *ptr = gd->smbios_version;
162 return log_ret(-ENOENT);
165 * This string is supposed to have at least enough bytes and is
166 * padded with spaces. Update it, taking care not to move the
167 * \0 terminator, so that other strings in the string table
168 * are not disturbed. See smbios_add_string()
170 old_len = strnlen(ptr, SMBIOS_STR_MAX);
171 len = strnlen(version, SMBIOS_STR_MAX);
173 return log_ret(-ENOSPC);
175 log_debug("Replacing SMBIOS type 0 version string '%s'\n", ptr);
176 memcpy(ptr, version, len);
178 print_buffer((ulong)ptr, ptr, 1, old_len + 1, 0);
185 * smbios_string_table_len() - compute the string area size
187 * This computes the size of the string area including the string terminator.
189 * @ctx: SMBIOS context
190 * Return: string area size
192 static int smbios_string_table_len(const struct smbios_ctx *ctx)
194 /* Allow for the final \0 after all strings */
195 return (ctx->next_ptr + 1) - ctx->eos;
198 static int smbios_write_type0(ulong *current, int handle,
199 struct smbios_ctx *ctx)
201 struct smbios_type0 *t;
202 int len = sizeof(struct smbios_type0);
204 t = map_sysmem(*current, len);
205 memset(t, 0, sizeof(struct smbios_type0));
206 fill_smbios_header(t, SMBIOS_BIOS_INFORMATION, len, handle);
207 smbios_set_eos(ctx, t->eos);
208 t->vendor = smbios_add_string(ctx, "U-Boot");
210 t->bios_ver = smbios_add_prop(ctx, "version");
212 t->bios_ver = smbios_add_string(ctx, PLAIN_VERSION);
214 gd->smbios_version = ctx->last_str;
215 log_debug("smbios_version = %p: '%s'\n", gd->smbios_version,
218 print_buffer((ulong)gd->smbios_version, gd->smbios_version,
219 1, strlen(gd->smbios_version) + 1, 0);
221 t->bios_release_date = smbios_add_string(ctx, U_BOOT_DMI_DATE);
222 #ifdef CONFIG_ROM_SIZE
223 t->bios_rom_size = (CONFIG_ROM_SIZE / 65536) - 1;
225 t->bios_characteristics = BIOS_CHARACTERISTICS_PCI_SUPPORTED |
226 BIOS_CHARACTERISTICS_SELECTABLE_BOOT |
227 BIOS_CHARACTERISTICS_UPGRADEABLE;
228 #ifdef CONFIG_GENERATE_ACPI_TABLE
229 t->bios_characteristics_ext1 = BIOS_CHARACTERISTICS_EXT1_ACPI;
231 #ifdef CONFIG_EFI_LOADER
232 t->bios_characteristics_ext2 |= BIOS_CHARACTERISTICS_EXT2_UEFI;
234 t->bios_characteristics_ext2 |= BIOS_CHARACTERISTICS_EXT2_TARGET;
236 /* bios_major_release has only one byte, so drop century */
237 t->bios_major_release = U_BOOT_VERSION_NUM % 100;
238 t->bios_minor_release = U_BOOT_VERSION_NUM_PATCH;
239 t->ec_major_release = 0xff;
240 t->ec_minor_release = 0xff;
242 len = t->length + smbios_string_table_len(ctx);
249 static int smbios_write_type1(ulong *current, int handle,
250 struct smbios_ctx *ctx)
252 struct smbios_type1 *t;
253 int len = sizeof(struct smbios_type1);
254 char *serial_str = env_get("serial#");
256 t = map_sysmem(*current, len);
257 memset(t, 0, sizeof(struct smbios_type1));
258 fill_smbios_header(t, SMBIOS_SYSTEM_INFORMATION, len, handle);
259 smbios_set_eos(ctx, t->eos);
260 t->manufacturer = smbios_add_prop(ctx, "manufacturer");
261 if (!t->manufacturer)
262 t->manufacturer = smbios_add_string(ctx, "Unknown");
263 t->product_name = smbios_add_prop(ctx, "product");
264 if (!t->product_name)
265 t->product_name = smbios_add_string(ctx, "Unknown 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 if (!t->manufacturer)
296 t->manufacturer = smbios_add_string(ctx, "Unknown");
297 t->product_name = smbios_add_prop(ctx, "product");
298 if (!t->product_name)
299 t->product_name = smbios_add_string(ctx, "Unknown Product");
300 t->version = smbios_add_prop_si(ctx, "version",
301 SYSINFO_ID_SMBIOS_BASEBOARD_VERSION);
302 t->asset_tag_number = smbios_add_prop(ctx, "asset-tag");
303 t->feature_flags = SMBIOS_BOARD_FEATURE_HOSTING;
304 t->board_type = SMBIOS_BOARD_MOTHERBOARD;
306 len = t->length + smbios_string_table_len(ctx);
313 static int smbios_write_type3(ulong *current, int handle,
314 struct smbios_ctx *ctx)
316 struct smbios_type3 *t;
317 int len = sizeof(struct smbios_type3);
319 t = map_sysmem(*current, len);
320 memset(t, 0, sizeof(struct smbios_type3));
321 fill_smbios_header(t, SMBIOS_SYSTEM_ENCLOSURE, len, handle);
322 smbios_set_eos(ctx, t->eos);
323 t->manufacturer = smbios_add_prop(ctx, "manufacturer");
324 if (!t->manufacturer)
325 t->manufacturer = smbios_add_string(ctx, "Unknown");
326 t->chassis_type = SMBIOS_ENCLOSURE_DESKTOP;
327 t->bootup_state = SMBIOS_STATE_SAFE;
328 t->power_supply_state = SMBIOS_STATE_SAFE;
329 t->thermal_state = SMBIOS_STATE_SAFE;
330 t->security_status = SMBIOS_SECURITY_NONE;
332 len = t->length + smbios_string_table_len(ctx);
339 static void smbios_write_type4_dm(struct smbios_type4 *t,
340 struct smbios_ctx *ctx)
342 u16 processor_family = SMBIOS_PROCESSOR_FAMILY_UNKNOWN;
343 const char *vendor = "Unknown";
344 const char *name = "Unknown";
347 char processor_name[49];
348 char vendor_name[49];
349 struct udevice *cpu = NULL;
351 uclass_find_first_device(UCLASS_CPU, &cpu);
353 struct cpu_plat *plat = dev_get_parent_plat(cpu);
356 processor_family = plat->family;
357 t->processor_id[0] = plat->id[0];
358 t->processor_id[1] = plat->id[1];
360 if (!cpu_get_vendor(cpu, vendor_name, sizeof(vendor_name)))
361 vendor = vendor_name;
362 if (!cpu_get_desc(cpu, processor_name, sizeof(processor_name)))
363 name = processor_name;
367 t->processor_family = processor_family;
368 t->processor_manufacturer = smbios_add_string(ctx, vendor);
369 t->processor_version = smbios_add_string(ctx, name);
372 static int smbios_write_type4(ulong *current, int handle,
373 struct smbios_ctx *ctx)
375 struct smbios_type4 *t;
376 int len = sizeof(struct smbios_type4);
378 t = map_sysmem(*current, len);
379 memset(t, 0, sizeof(struct smbios_type4));
380 fill_smbios_header(t, SMBIOS_PROCESSOR_INFORMATION, len, handle);
381 smbios_set_eos(ctx, t->eos);
382 t->processor_type = SMBIOS_PROCESSOR_TYPE_CENTRAL;
383 smbios_write_type4_dm(t, ctx);
384 t->status = SMBIOS_PROCESSOR_STATUS_ENABLED;
385 t->processor_upgrade = SMBIOS_PROCESSOR_UPGRADE_NONE;
386 t->l1_cache_handle = 0xffff;
387 t->l2_cache_handle = 0xffff;
388 t->l3_cache_handle = 0xffff;
389 t->processor_family2 = t->processor_family;
391 len = t->length + smbios_string_table_len(ctx);
398 static int smbios_write_type32(ulong *current, int handle,
399 struct smbios_ctx *ctx)
401 struct smbios_type32 *t;
402 int len = sizeof(struct smbios_type32);
404 t = map_sysmem(*current, len);
405 memset(t, 0, sizeof(struct smbios_type32));
406 fill_smbios_header(t, SMBIOS_SYSTEM_BOOT_INFORMATION, len, handle);
407 smbios_set_eos(ctx, t->eos);
415 static int smbios_write_type127(ulong *current, int handle,
416 struct smbios_ctx *ctx)
418 struct smbios_type127 *t;
419 int len = sizeof(struct smbios_type127);
421 t = map_sysmem(*current, len);
422 memset(t, 0, sizeof(struct smbios_type127));
423 fill_smbios_header(t, SMBIOS_END_OF_TABLE, len, handle);
431 static struct smbios_write_method smbios_write_funcs[] = {
432 { smbios_write_type0, "bios", },
433 { smbios_write_type1, "system", },
434 { smbios_write_type2, "baseboard", },
435 { smbios_write_type3, "chassis", },
436 { smbios_write_type4, },
437 { smbios_write_type32, },
438 { smbios_write_type127 },
441 ulong write_smbios_table(ulong addr)
443 ofnode parent_node = ofnode_null();
444 struct smbios_entry *se;
445 struct smbios_ctx ctx;
449 int max_struct_size = 0;
455 ctx.node = ofnode_null();
456 if (IS_ENABLED(CONFIG_OF_CONTROL)) {
457 uclass_first_device(UCLASS_SYSINFO, &ctx.dev);
459 parent_node = dev_read_subnode(ctx.dev, "smbios");
464 /* 16 byte align the table address */
465 addr = ALIGN(addr, 16);
467 se = map_sysmem(addr, sizeof(struct smbios_entry));
468 memset(se, 0, sizeof(struct smbios_entry));
470 addr += sizeof(struct smbios_entry);
471 addr = ALIGN(addr, 16);
474 /* populate minimum required tables */
475 for (i = 0; i < ARRAY_SIZE(smbios_write_funcs); i++) {
476 const struct smbios_write_method *method;
479 method = &smbios_write_funcs[i];
480 if (IS_ENABLED(CONFIG_OF_CONTROL) && method->subnode_name)
481 ctx.node = ofnode_find_subnode(parent_node,
482 method->subnode_name);
483 tmp = method->write((ulong *)&addr, handle++, &ctx);
485 max_struct_size = max(max_struct_size, tmp);
489 memcpy(se->anchor, "_SM_", 4);
490 se->length = sizeof(struct smbios_entry);
491 se->major_ver = SMBIOS_MAJOR_VER;
492 se->minor_ver = SMBIOS_MINOR_VER;
493 se->max_struct_size = max_struct_size;
494 memcpy(se->intermediate_anchor, "_DMI_", 5);
495 se->struct_table_length = len;
498 * We must use a pointer here so things work correctly on sandbox. The
499 * user of this table is not aware of the mapping of addresses to
500 * sandbox's DRAM buffer.
502 table_addr = (ulong)map_sysmem(tables, 0);
503 if (sizeof(table_addr) > sizeof(u32) && table_addr > (ulong)UINT_MAX) {
505 * We need to put this >32-bit pointer into the table but the
506 * field is only 32 bits wide.
508 printf("WARNING: SMBIOS table_address overflow %llx\n",
509 (unsigned long long)table_addr);
512 se->struct_table_address = table_addr;
514 se->struct_count = handle;
516 /* calculate checksums */
517 istart = (char *)se + SMBIOS_INTERMEDIATE_OFFSET;
518 isize = sizeof(struct smbios_entry) - SMBIOS_INTERMEDIATE_OFFSET;
519 se->intermediate_checksum = table_compute_checksum(istart, isize);
520 se->checksum = table_compute_checksum(se, sizeof(struct smbios_entry));