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
16 DECLARE_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 */
24 struct 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
cb_parse_memory(unsigned char * ptr,struct sysinfo_t * info)36 static 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
cb_parse_serial(unsigned char * ptr,struct sysinfo_t * info)63 static 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
cb_parse_vboot_handoff(unsigned char * ptr,struct sysinfo_t * info)70 static 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
cb_parse_vbnv(unsigned char * ptr,struct sysinfo_t * info)78 static 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
cb_parse_cbmem_entry(unsigned char * ptr,struct sysinfo_t * info)86 static 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
cb_parse_gpios(unsigned char * ptr,struct sysinfo_t * info)97 static 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
cb_parse_vdat(unsigned char * ptr,struct sysinfo_t * info)109 static 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
cb_parse_mac_addresses(unsigned char * ptr,struct sysinfo_t * info)117 static 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
cb_parse_tstamp(void * ptr,struct sysinfo_t * info)130 static 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
cb_parse_cbmem_cons(void * ptr,struct sysinfo_t * info)137 static 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
cb_parse_acpi_gnvs(unsigned char * ptr,struct sysinfo_t * info)144 static 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
cb_parse_board_id(unsigned char * ptr,struct sysinfo_t * info)151 static 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
cb_parse_ram_code(unsigned char * ptr,struct sysinfo_t * info)158 static 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
cb_parse_optiontable(void * ptr,struct sysinfo_t * info)165 static 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
cb_parse_checksum(void * ptr,struct sysinfo_t * info)171 static 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
cb_parse_framebuffer(void * ptr,struct sysinfo_t * info)180 static 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
cb_parse_string(unsigned char * ptr,char ** info)186 static void cb_parse_string(unsigned char *ptr, char **info)
187 {
188 *info = (char *)((struct cb_string *)ptr)->string;
189 }
190
cb_parse_wifi_calibration(void * ptr,struct sysinfo_t * info)191 static 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
cb_parse_ramoops(void * ptr,struct sysinfo_t * info)198 static 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
cb_parse_mtc(void * ptr,struct sysinfo_t * info)206 static 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
cb_parse_spi_flash(void * ptr,struct sysinfo_t * info)214 static 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
cb_parse_boot_media_params(unsigned char * ptr,struct sysinfo_t * info)223 static 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
cb_parse_vpd(void * ptr,struct sysinfo_t * info)235 static 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
cb_parse_tsc_info(void * ptr,struct sysinfo_t * info)242 static 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
cb_parse_x86_rom_var_mtrr(void * ptr,struct sysinfo_t * info)253 static 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
cb_parse_mrc_cache(void * ptr,struct sysinfo_t * info)260 static 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
cb_parse_acpi_rsdp(void * ptr,struct sysinfo_t * info)267 static 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
cb_parse_unhandled(u32 tag,unsigned char * ptr)274 __weak void cb_parse_unhandled(u32 tag, unsigned char *ptr)
275 {
276 }
277
cb_parse_header(void * addr,int len,struct sysinfo_t * info)278 static 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
451 return 1;
452 }
453
454 /* == Architecture specific == */
455 /* This is the x86 specific stuff */
456
get_coreboot_info(struct sysinfo_t * info)457 int get_coreboot_info(struct sysinfo_t *info)
458 {
459 long addr;
460 int ret;
461
462 addr = locate_coreboot_table();
463 if (addr < 0)
464 return addr;
465 ret = cb_parse_header((void *)addr, 0x1000, info);
466 if (!ret)
467 return -ENOENT;
468 gd->arch.coreboot_table = addr;
469 gd_set_acpi_start(map_to_sysmem(info->rsdp));
470 gd->flags |= GD_FLG_SKIP_LL_INIT;
471
472 return 0;
473 }
474
cb_get_sysinfo(void)475 const struct sysinfo_t *cb_get_sysinfo(void)
476 {
477 if (!ll_boot_init())
478 return &lib_sysinfo;
479
480 return NULL;
481 }
482