1// SPDX-License-Identifier: BSD-3-Clause 2/* 3 * This file is part of the libpayload project. 4 * 5 * Copyright (C) 2008 Advanced Micro Devices, Inc. 6 * Copyright (C) 2009 coresystems GmbH 7 */ 8 9#include <common.h> 10#include <asm/cb_sysinfo.h> 11#include <init.h> 12#include <mapmem.h> 13#include <net.h> 14#include <asm/global_data.h> 15 16DECLARE_GLOBAL_DATA_PTR; 17 18/* 19 * This needs to be in the .data section so that it's copied over during 20 * relocation. By default it's put in the .bss section which is simply filled 21 * with zeroes when transitioning from "ROM", which is really RAM, to other 22 * RAM. 23 */ 24struct sysinfo_t lib_sysinfo __section(".data"); 25 26/* 27 * Some of this is x86 specific, and the rest of it is generic. Right now, 28 * since we only support x86, we'll avoid trying to make lots of infrastructure 29 * we don't need. If in the future, we want to use coreboot on some other 30 * architecture, then take out the generic parsing code and move it elsewhere. 31 */ 32 33/* === Parsing code === */ 34/* This is the generic parsing code */ 35 36static void cb_parse_memory(unsigned char *ptr, struct sysinfo_t *info) 37{ 38 struct cb_memory *mem = (struct cb_memory *)ptr; 39 int count = MEM_RANGE_COUNT(mem); 40 int i; 41 42 if (count > SYSINFO_MAX_MEM_RANGES) 43 count = SYSINFO_MAX_MEM_RANGES; 44 45 info->n_memranges = 0; 46 47 for (i = 0; i < count; i++) { 48 struct cb_memory_range *range = 49 (struct cb_memory_range *)MEM_RANGE_PTR(mem, i); 50 51 info->memrange[info->n_memranges].base = 52 UNPACK_CB64(range->start); 53 54 info->memrange[info->n_memranges].size = 55 UNPACK_CB64(range->size); 56 57 info->memrange[info->n_memranges].type = range->type; 58 59 info->n_memranges++; 60 } 61} 62 63static void cb_parse_serial(unsigned char *ptr, struct sysinfo_t *info) 64{ 65 struct cb_serial *ser = (struct cb_serial *)ptr; 66 67 info->serial = ser; 68} 69 70static void cb_parse_vboot_handoff(unsigned char *ptr, struct sysinfo_t *info) 71{ 72 struct lb_range *vbho = (struct lb_range *)ptr; 73 74 info->vboot_handoff = (void *)(uintptr_t)vbho->range_start; 75 info->vboot_handoff_size = vbho->range_size; 76} 77 78static void cb_parse_vbnv(unsigned char *ptr, struct sysinfo_t *info) 79{ 80 struct lb_range *vbnv = (struct lb_range *)ptr; 81 82 info->vbnv_start = vbnv->range_start; 83 info->vbnv_size = vbnv->range_size; 84} 85 86static void cb_parse_cbmem_entry(unsigned char *ptr, struct sysinfo_t *info) 87{ 88 struct cb_cbmem_entry *entry = (struct cb_cbmem_entry *)ptr; 89 90 if (entry->id != CBMEM_ID_SMBIOS) 91 return; 92 93 info->smbios_start = entry->address; 94 info->smbios_size = entry->entry_size; 95} 96 97static void cb_parse_gpios(unsigned char *ptr, struct sysinfo_t *info) 98{ 99 int i; 100 struct cb_gpios *gpios = (struct cb_gpios *)ptr; 101 102 info->num_gpios = (gpios->count < SYSINFO_MAX_GPIOS) ? 103 (gpios->count) : SYSINFO_MAX_GPIOS; 104 105 for (i = 0; i < info->num_gpios; i++) 106 info->gpios[i] = gpios->gpios[i]; 107} 108 109static void cb_parse_vdat(unsigned char *ptr, struct sysinfo_t *info) 110{ 111 struct lb_range *vdat = (struct lb_range *)ptr; 112 113 info->vdat_addr = map_sysmem(vdat->range_start, vdat->range_size); 114 info->vdat_size = vdat->range_size; 115} 116 117static void cb_parse_mac_addresses(unsigned char *ptr, 118 struct sysinfo_t *info) 119{ 120 struct cb_macs *macs = (struct cb_macs *)ptr; 121 int i; 122 123 info->num_macs = (macs->count < ARRAY_SIZE(info->macs)) ? 124 macs->count : ARRAY_SIZE(info->macs); 125 126 for (i = 0; i < info->num_macs; i++) 127 info->macs[i] = macs->mac_addrs[i]; 128} 129 130static void cb_parse_tstamp(void *ptr, struct sysinfo_t *info) 131{ 132 struct cb_cbmem_tab *const cbmem = ptr; 133 134 info->tstamp_table = map_sysmem(cbmem->cbmem_tab, 0); 135} 136 137static void cb_parse_cbmem_cons(void *ptr, struct sysinfo_t *info) 138{ 139 struct cb_cbmem_tab *const cbmem = ptr; 140 141 info->cbmem_cons = map_sysmem(cbmem->cbmem_tab, 0); 142} 143 144static void cb_parse_acpi_gnvs(unsigned char *ptr, struct sysinfo_t *info) 145{ 146 struct cb_cbmem_tab *const cbmem = (struct cb_cbmem_tab *)ptr; 147 148 info->acpi_gnvs = map_sysmem(cbmem->cbmem_tab, 0); 149} 150 151static void cb_parse_board_id(unsigned char *ptr, struct sysinfo_t *info) 152{ 153 struct cb_board_id *const cbbid = (struct cb_board_id *)ptr; 154 155 info->board_id = cbbid->board_id; 156} 157 158static void cb_parse_ram_code(unsigned char *ptr, struct sysinfo_t *info) 159{ 160 struct cb_ram_code *const ram_code = (struct cb_ram_code *)ptr; 161 162 info->ram_code = ram_code->ram_code; 163} 164 165static void cb_parse_optiontable(void *ptr, struct sysinfo_t *info) 166{ 167 /* ptr points to a coreboot table entry and is already virtual */ 168 info->option_table = ptr; 169} 170 171static void cb_parse_checksum(void *ptr, struct sysinfo_t *info) 172{ 173 struct cb_cmos_checksum *cmos_cksum = ptr; 174 175 info->cmos_range_start = cmos_cksum->range_start; 176 info->cmos_range_end = cmos_cksum->range_end; 177 info->cmos_checksum_location = cmos_cksum->location; 178} 179 180static void cb_parse_framebuffer(void *ptr, struct sysinfo_t *info) 181{ 182 /* ptr points to a coreboot table entry and is already virtual */ 183 info->framebuffer = ptr; 184} 185 186static void cb_parse_string(unsigned char *ptr, char **info) 187{ 188 *info = (char *)((struct cb_string *)ptr)->string; 189} 190 191static void cb_parse_wifi_calibration(void *ptr, struct sysinfo_t *info) 192{ 193 struct cb_cbmem_tab *const cbmem = (struct cb_cbmem_tab *)ptr; 194 195 info->wifi_calibration = map_sysmem(cbmem->cbmem_tab, 0); 196} 197 198static void cb_parse_ramoops(void *ptr, struct sysinfo_t *info) 199{ 200 struct lb_range *ramoops = (struct lb_range *)ptr; 201 202 info->ramoops_buffer = ramoops->range_start; 203 info->ramoops_buffer_size = ramoops->range_size; 204} 205 206static void cb_parse_mtc(void *ptr, struct sysinfo_t *info) 207{ 208 struct lb_range *mtc = (struct lb_range *)ptr; 209 210 info->mtc_start = mtc->range_start; 211 info->mtc_size = mtc->range_size; 212} 213 214static void cb_parse_spi_flash(void *ptr, struct sysinfo_t *info) 215{ 216 struct cb_spi_flash *flash = (struct cb_spi_flash *)ptr; 217 218 info->spi_flash.size = flash->flash_size; 219 info->spi_flash.sector_size = flash->sector_size; 220 info->spi_flash.erase_cmd = flash->erase_cmd; 221} 222 223static void cb_parse_boot_media_params(unsigned char *ptr, 224 struct sysinfo_t *info) 225{ 226 struct cb_boot_media_params *const bmp = 227 (struct cb_boot_media_params *)ptr; 228 229 info->fmap_offset = bmp->fmap_offset; 230 info->cbfs_offset = bmp->cbfs_offset; 231 info->cbfs_size = bmp->cbfs_size; 232 info->boot_media_size = bmp->boot_media_size; 233} 234 235static void cb_parse_vpd(void *ptr, struct sysinfo_t *info) 236{ 237 struct cb_cbmem_tab *const cbmem = (struct cb_cbmem_tab *)ptr; 238 239 info->chromeos_vpd = map_sysmem(cbmem->cbmem_tab, 0); 240} 241 242static void cb_parse_tsc_info(void *ptr, struct sysinfo_t *info) 243{ 244 const struct cb_tsc_info *tsc_info = ptr; 245 246 if (tsc_info->freq_khz == 0) 247 return; 248 249 /* Honor the TSC frequency passed to the payload */ 250 info->cpu_khz = tsc_info->freq_khz; 251} 252 253static void cb_parse_x86_rom_var_mtrr(void *ptr, struct sysinfo_t *info) 254{ 255 struct cb_x86_rom_mtrr *rom_mtrr = ptr; 256 257 info->x86_rom_var_mtrr_index = rom_mtrr->index; 258} 259 260static void cb_parse_mrc_cache(void *ptr, struct sysinfo_t *info) 261{ 262 struct cb_cbmem_tab *const cbmem = (struct cb_cbmem_tab *)ptr; 263 264 info->mrc_cache = map_sysmem(cbmem->cbmem_tab, 0); 265} 266 267static void cb_parse_acpi_rsdp(void *ptr, struct sysinfo_t *info) 268{ 269 struct cb_cbmem_tab *const cbmem = (struct cb_cbmem_tab *)ptr; 270 271 info->rsdp = map_sysmem(cbmem->cbmem_tab, 0); 272} 273 274__weak void cb_parse_unhandled(u32 tag, unsigned char *ptr) 275{ 276} 277 278static int cb_parse_header(void *addr, int len, struct sysinfo_t *info) 279{ 280 unsigned char *ptr = addr; 281 struct cb_header *header; 282 int i; 283 284 header = (struct cb_header *)ptr; 285 if (!header->table_bytes) 286 return 0; 287 288 /* Make sure the checksums match */ 289 if (!ip_checksum_ok(header, sizeof(*header))) 290 return -1; 291 292 if (compute_ip_checksum(ptr + sizeof(*header), header->table_bytes) != 293 header->table_checksum) 294 return -1; 295 296 info->header = header; 297 298 /* 299 * Board straps represented by numerical values are small numbers. 300 * Preset them to an invalid value in case the firmware does not 301 * supply the info. 302 */ 303 info->board_id = ~0; 304 info->ram_code = ~0; 305 306 /* Now, walk the tables */ 307 ptr += header->header_bytes; 308 309 /* Inintialize some fields to sentinel values */ 310 info->vbnv_start = info->vbnv_size = (uint32_t)(-1); 311 312 for (i = 0; i < header->table_entries; i++) { 313 struct cb_record *rec = (struct cb_record *)ptr; 314 315 /* We only care about a few tags here (maybe more later) */ 316 switch (rec->tag) { 317 case CB_TAG_FORWARD: 318 return cb_parse_header( 319 (void *)(unsigned long) 320 ((struct cb_forward *)rec)->forward, 321 len, info); 322 continue; 323 case CB_TAG_MEMORY: 324 cb_parse_memory(ptr, info); 325 break; 326 case CB_TAG_SERIAL: 327 cb_parse_serial(ptr, info); 328 break; 329 case CB_TAG_VERSION: 330 cb_parse_string(ptr, &info->cb_version); 331 break; 332 case CB_TAG_EXTRA_VERSION: 333 cb_parse_string(ptr, &info->extra_version); 334 break; 335 case CB_TAG_BUILD: 336 cb_parse_string(ptr, &info->build); 337 break; 338 case CB_TAG_COMPILE_TIME: 339 cb_parse_string(ptr, &info->compile_time); 340 break; 341 case CB_TAG_COMPILE_BY: 342 cb_parse_string(ptr, &info->compile_by); 343 break; 344 case CB_TAG_COMPILE_HOST: 345 cb_parse_string(ptr, &info->compile_host); 346 break; 347 case CB_TAG_COMPILE_DOMAIN: 348 cb_parse_string(ptr, &info->compile_domain); 349 break; 350 case CB_TAG_COMPILER: 351 cb_parse_string(ptr, &info->compiler); 352 break; 353 case CB_TAG_LINKER: 354 cb_parse_string(ptr, &info->linker); 355 break; 356 case CB_TAG_ASSEMBLER: 357 cb_parse_string(ptr, &info->assembler); 358 break; 359 case CB_TAG_CMOS_OPTION_TABLE: 360 cb_parse_optiontable(ptr, info); 361 break; 362 case CB_TAG_OPTION_CHECKSUM: 363 cb_parse_checksum(ptr, info); 364 break; 365 /* 366 * FIXME we should warn on serial if coreboot set up a 367 * framebuffer buf the payload does not know about it. 368 */ 369 case CB_TAG_FRAMEBUFFER: 370 cb_parse_framebuffer(ptr, info); 371 break; 372 case CB_TAG_MAINBOARD: 373 info->mainboard = (struct cb_mainboard *)ptr; 374 break; 375 case CB_TAG_GPIO: 376 cb_parse_gpios(ptr, info); 377 break; 378 case CB_TAG_VDAT: 379 cb_parse_vdat(ptr, info); 380 break; 381 case CB_TAG_VBNV: 382 cb_parse_vbnv(ptr, info); 383 break; 384 case CB_TAG_VBOOT_HANDOFF: 385 cb_parse_vboot_handoff(ptr, info); 386 break; 387 case CB_TAG_MAC_ADDRS: 388 cb_parse_mac_addresses(ptr, info); 389 break; 390 case CB_TAG_SERIALNO: 391 cb_parse_string(ptr, &info->serialno); 392 break; 393 case CB_TAG_TIMESTAMPS: 394 cb_parse_tstamp(ptr, info); 395 break; 396 case CB_TAG_CBMEM_CONSOLE: 397 cb_parse_cbmem_cons(ptr, info); 398 break; 399 case CB_TAG_ACPI_GNVS: 400 cb_parse_acpi_gnvs(ptr, info); 401 break; 402 case CB_TAG_CBMEM_ENTRY: 403 cb_parse_cbmem_entry(ptr, info); 404 break; 405 case CB_TAG_BOARD_ID: 406 cb_parse_board_id(ptr, info); 407 break; 408 case CB_TAG_RAM_CODE: 409 cb_parse_ram_code(ptr, info); 410 break; 411 case CB_TAG_WIFI_CALIBRATION: 412 cb_parse_wifi_calibration(ptr, info); 413 break; 414 case CB_TAG_RAM_OOPS: 415 cb_parse_ramoops(ptr, info); 416 break; 417 case CB_TAG_SPI_FLASH: 418 cb_parse_spi_flash(ptr, info); 419 break; 420 case CB_TAG_MTC: 421 cb_parse_mtc(ptr, info); 422 break; 423 case CB_TAG_BOOT_MEDIA_PARAMS: 424 cb_parse_boot_media_params(ptr, info); 425 break; 426 case CB_TAG_TSC_INFO: 427 cb_parse_tsc_info(ptr, info); 428 break; 429 case CB_TAG_VPD: 430 cb_parse_vpd(ptr, info); 431 break; 432 case CB_TAG_X86_ROM_MTRR: 433 cb_parse_x86_rom_var_mtrr(rec, info); 434 break; 435 case CB_TAG_MRC_CACHE: 436 cb_parse_mrc_cache(rec, info); 437 break; 438 case CB_TAG_ACPI_RSDP: 439 cb_parse_acpi_rsdp(rec, info); 440 break; 441 default: 442 if (info->unimpl_count < SYSINFO_MAX_UNIMPL) 443 info->unimpl[info->unimpl_count++] = rec->tag; 444 cb_parse_unhandled(rec->tag, ptr); 445 break; 446 } 447 448 ptr += rec->size; 449 } 450 info->table_size += (void *)ptr - (void *)header; 451 info->rec_count += header->table_entries; 452 453 return 1; 454} 455 456/* == Architecture specific == */ 457/* This is the x86 specific stuff */ 458 459int get_coreboot_info(struct sysinfo_t *info) 460{ 461 long addr; 462 int ret; 463 464 addr = locate_coreboot_table(); 465 if (addr < 0) 466 return addr; 467 info->table_size = 0; 468 info->rec_count = 0; 469 ret = cb_parse_header((void *)addr, 0x1000, info); 470 if (!ret) 471 return -ENOENT; 472 gd->arch.coreboot_table = addr; 473 gd_set_acpi_start(map_to_sysmem(info->rsdp)); 474 gd_set_smbios_start(info->smbios_start); 475 gd->flags |= GD_FLG_SKIP_LL_INIT; 476 477 return 0; 478} 479 480const struct sysinfo_t *cb_get_sysinfo(void) 481{ 482 if (!ll_boot_init()) 483 return &lib_sysinfo; 484 485 return NULL; 486} 487