1 // Coreboot interface support.
3 // Copyright (C) 2008 Kevin O'Connor <kevin@koconnor.net>
5 // This file may be distributed under the terms of the GNU LGPLv3 license.
7 #include "memmap.h" // add_e820
8 #include "util.h" // dprintf
9 #include "pci.h" // struct pir_header
10 #include "acpi.h" // struct rsdp_descriptor
11 #include "mptable.h" // MPTABLE_SIGNATURE
12 #include "biosvar.h" // GET_EBDA
13 #include "lzmadecode.h" // LzmaDecode
16 /****************************************************************
18 ****************************************************************/
23 struct pir_header *p = pos;
24 if (p->signature != PIR_SIGNATURE)
28 if (p->size < sizeof(*p))
30 if (checksum(pos, p->size) != 0)
32 bios_table_cur_addr = ALIGN(bios_table_cur_addr, 16);
33 if (bios_table_cur_addr + p->size > bios_table_end_addr) {
34 dprintf(1, "No room to copy PIR table!\n");
37 dprintf(1, "Copying PIR from %p to %x\n", pos, bios_table_cur_addr);
38 memcpy((void*)bios_table_cur_addr, pos, p->size);
39 PirOffset = bios_table_cur_addr - BUILD_BIOS_ADDR;
40 bios_table_cur_addr += p->size;
44 copy_mptable(void *pos)
46 struct mptable_floating_s *p = pos;
47 if (p->signature != MPTABLE_SIGNATURE)
51 if (checksum(pos, sizeof(*p)) != 0)
53 u32 length = p->length * 16;
54 bios_table_cur_addr = ALIGN(bios_table_cur_addr, 16);
55 u16 mpclength = ((struct mptable_config_s *)p->physaddr)->length;
56 if (bios_table_cur_addr + length + mpclength > bios_table_end_addr) {
57 dprintf(1, "No room to copy MPTABLE!\n");
60 dprintf(1, "Copying MPTABLE from %p/%x to %x\n"
61 , pos, p->physaddr, bios_table_cur_addr);
62 memcpy((void*)bios_table_cur_addr, pos, length);
63 struct mptable_floating_s *newp = (void*)bios_table_cur_addr;
64 newp->physaddr = bios_table_cur_addr + length;
65 newp->checksum -= checksum(newp, sizeof(*newp));
66 memcpy((void*)bios_table_cur_addr + length, (void*)p->physaddr, mpclength);
67 bios_table_cur_addr += length + mpclength;
71 copy_acpi_rsdp(void *pos)
75 struct rsdp_descriptor *p = pos;
76 if (p->signature != RSDP_SIGNATURE)
79 if (checksum(pos, length) != 0)
81 if (p->revision > 1) {
83 if (checksum(pos, length) != 0)
86 bios_table_cur_addr = ALIGN(bios_table_cur_addr, 16);
87 if (bios_table_cur_addr + length > bios_table_end_addr) {
88 dprintf(1, "No room to copy ACPI RSDP table!\n");
91 dprintf(1, "Copying ACPI RSDP from %p to %x\n", pos, bios_table_cur_addr);
92 RsdpAddr = (void*)bios_table_cur_addr;
93 memcpy(RsdpAddr, pos, length);
94 bios_table_cur_addr += length;
97 // Attempt to find (and relocate) any standard bios tables found in a
98 // given address range.
100 scan_tables(u32 start, u32 size)
102 void *p = (void*)ALIGN(start, 16);
103 void *end = (void*)start + size;
104 for (; p<end; p += 16) {
112 /****************************************************************
114 ****************************************************************/
125 #define CB_SIGNATURE 0x4f49424C // "LBIO"
127 struct cb_memory_range {
133 #define CB_MEM_TABLE 16
138 struct cb_memory_range map[0];
141 #define CB_TAG_MEMORY 0x01
143 #define MEM_RANGE_COUNT(_rec) \
144 (((_rec)->size - sizeof(*(_rec))) / sizeof((_rec)->map[0]))
146 struct cb_mainboard {
154 #define CB_TAG_MAINBOARD 0x0003
162 #define CB_TAG_FORWARD 0x11
165 ipchksum(char *buf, int count)
175 sum = (sum >> 16) + (sum & 0xffff);
180 // Try to locate the coreboot header in a given address range.
181 static struct cb_header *
182 find_cb_header(char *addr, int len)
184 char *end = addr + len;
185 for (; addr < end; addr += 16) {
186 struct cb_header *cbh = (struct cb_header *)addr;
187 if (cbh->signature != CB_SIGNATURE)
189 if (! cbh->table_bytes)
191 if (ipchksum(addr, sizeof(*cbh)) != 0)
193 if (ipchksum(addr + sizeof(*cbh), cbh->table_bytes)
194 != cbh->table_checksum)
201 // Try to find the coreboot memory table in the given coreboot table.
203 find_cb_subtable(struct cb_header *cbh, u32 tag)
205 char *tbl = (char *)cbh + sizeof(*cbh);
207 for (i=0; i<cbh->table_entries; i++) {
208 struct cb_memory *cbm = (struct cb_memory *)tbl;
216 // Populate max ram and e820 map info by scanning for a coreboot table.
220 dprintf(3, "Attempting to find coreboot table\n");
222 // Init variables set in coreboot table memory scan.
226 // Find coreboot table.
227 struct cb_header *cbh = find_cb_header(0, 0x1000);
230 struct cb_forward *cbf = find_cb_subtable(cbh, CB_TAG_FORWARD);
232 dprintf(3, "Found coreboot table forwarder.\n");
233 cbh = find_cb_header((char *)((u32)cbf->forward), 0x100);
237 dprintf(3, "Now attempting to find coreboot memory map\n");
238 struct cb_memory *cbm = find_cb_subtable(cbh, CB_TAG_MEMORY);
242 u64 maxram = 0, maxram_over4G = 0;
243 int i, count = MEM_RANGE_COUNT(cbm);
244 for (i=0; i<count; i++) {
245 struct cb_memory_range *m = &cbm->map[i];
247 if (type == CB_MEM_TABLE) {
248 type = E820_RESERVED;
249 scan_tables(m->start, m->size);
250 } else if (type == E820_ACPI || type == E820_RAM) {
251 u64 end = m->start + m->size;
252 if (end > 0x100000000ull) {
253 end -= 0x100000000ull;
254 if (end > maxram_over4G)
256 } else if (end > maxram)
259 add_e820(m->start, m->size, type);
263 RamSizeOver4G = maxram_over4G;
265 // Ughh - coreboot likes to set a map at 0x0000-0x1000, but this
266 // confuses grub. So, override it.
267 add_e820(0, 16*1024, E820_RAM);
269 // XXX - just create dummy smbios table for now - should detect if
270 // smbios/dmi table is found from coreboot and use that instead.
273 struct cb_mainboard *cbmb = find_cb_subtable(cbh, CB_TAG_MAINBOARD);
275 const char *vendor = &cbmb->strings[cbmb->vendor_idx];
276 const char *part = &cbmb->strings[cbmb->part_idx];
277 dprintf(1, "Found mainboard %s %s\n", vendor, part);
279 vgahook_setup(vendor, part);
285 // No table found.. Use 16Megs as a dummy value.
286 dprintf(1, "Unable to find coreboot table!\n");
287 RamSize = 16*1024*1024;
289 add_e820(0, 16*1024*1024, E820_RAM);
294 /****************************************************************
296 ****************************************************************/
299 ulzma(u8 *dst, u32 maxlen, const u8 *src, u32 srclen)
301 dprintf(3, "Uncompressing data %d@%p to %d@%p\n", srclen, src, maxlen, dst);
302 CLzmaDecoderState state;
303 int ret = LzmaDecodeProperties(&state.Properties, src, LZMA_PROPERTIES_SIZE);
304 if (ret != LZMA_RESULT_OK) {
305 dprintf(1, "LzmaDecodeProperties error - %d\n", ret);
309 int need = (LzmaGetNumProbs(&state.Properties) * sizeof(CProb));
310 if (need > sizeof(scratch)) {
311 dprintf(1, "LzmaDecode need %d have %d\n", need, sizeof(scratch));
314 state.Probs = (CProb *)scratch;
316 u32 dstlen = *(u32*)(src + LZMA_PROPERTIES_SIZE);
317 if (dstlen > maxlen) {
318 dprintf(1, "LzmaDecode too large (max %d need %d)\n", maxlen, dstlen);
321 u32 inProcessed, outProcessed;
322 ret = LzmaDecode(&state, src + LZMA_PROPERTIES_SIZE + 8, srclen
323 , &inProcessed, dst, dstlen, &outProcessed);
325 dprintf(1, "LzmaDecode returned %d\n", ret);
332 /****************************************************************
333 * Coreboot flash format
334 ****************************************************************/
337 #define ntohl(x) ((((x)&0xff)<<24) | (((x)&0xff00)<<8) | \
338 (((x)&0xff0000) >> 8) | (((x)&0xff000000) >> 24))
339 #define htonl(x) ntohl(x)
341 #define CBFS_HEADER_MAGIC 0x4F524243
342 #define CBFS_HEADPTR_ADDR 0xFFFFFFFc
343 #define CBFS_VERSION1 0x31313131
355 static struct cbfs_header *CBHDR;
360 if (! CONFIG_COREBOOT_FLASH)
363 CBHDR = *(void **)CBFS_HEADPTR_ADDR;
364 if (CBHDR->magic != htonl(CBFS_HEADER_MAGIC)) {
365 dprintf(1, "Unable to find CBFS (got %x not %x)\n"
366 , CBHDR->magic, htonl(CBFS_HEADER_MAGIC));
371 dprintf(1, "Found CBFS header at %p\n", CBHDR);
374 #define CBFS_FILE_MAGIC 0x455649484352414cLL // LARCHIVE
385 static struct cbfs_file *
386 cbfs_search(struct cbfs_file *file)
389 if (file < (struct cbfs_file *)(0xFFFFFFFF - ntohl(CBHDR->romsize)))
391 u64 magic = file->magic;
392 if (magic == CBFS_FILE_MAGIC) {
393 dprintf(5, "Found CBFS file %s\n", file->filename);
398 file = (void*)file + ntohl(CBHDR->align);
402 static struct cbfs_file *
407 return cbfs_search((void *)(0 - ntohl(CBHDR->romsize) + ntohl(CBHDR->offset)));
410 static struct cbfs_file *
411 cbfs_getnext(struct cbfs_file *file)
413 file = (void*)file + ALIGN(ntohl(file->len) + ntohl(file->offset), ntohl(CBHDR->align));
414 return cbfs_search(file);
417 static struct cbfs_file *
418 cbfs_findfile(const char *fname)
420 dprintf(3, "Searching CBFS for %s\n", fname);
421 struct cbfs_file *file;
422 for (file = cbfs_getfirst(); file; file = cbfs_getnext(file)) {
423 if (strcmp(fname, file->filename) == 0)
430 data_copy(u8 *dst, u32 maxlen, const u8 *src, u32 srclen)
432 dprintf(3, "Copying data %d@%p to %d@%p\n", srclen, src, maxlen, dst);
433 if (srclen > maxlen) {
434 dprintf(1, "File too big to copy\n");
437 memcpy(dst, src, srclen);
441 // Copy a file to memory (uncompressing if necessary)
443 cbfs_copyfile(void *dst, u32 maxlen, const char *fname)
445 dprintf(3, "Searching CBFS for data file %s\n", fname);
446 int fnlen = strlen(fname);
447 struct cbfs_file *file;
448 for (file = cbfs_getfirst(); file; file = cbfs_getnext(file)) {
449 if (memcmp(fname, file->filename, fnlen) != 0)
451 u32 size = ntohl(file->len);
452 void *src = (void*)file + ntohl(file->offset);
453 if (file->filename[fnlen] == '\0')
454 return data_copy(dst, maxlen, src, size);
455 if (strcmp(&file->filename[fnlen], ".lzma") == 0)
456 return ulzma(dst, maxlen, src, size);
462 cbfs_findNprefix(const char *prefix, int n)
464 if (! CONFIG_COREBOOT_FLASH)
467 dprintf(3, "Searching CBFS for prefix %s\n", prefix);
468 int len = strlen(prefix);
469 struct cbfs_file *file;
470 for (file = cbfs_getfirst(); file; file = cbfs_getnext(file)) {
471 if (memcmp(prefix, file->filename, len) == 0) {
473 return file->filename;
491 return ((getHex(x&0xf) << 24)
492 | (getHex((x>>4)&0xf) << 16)
493 | (getHex((x>>8)&0xf) << 8)
498 cbfs_copy_optionrom(void *dst, u32 maxlen, u32 vendev)
500 if (! CONFIG_COREBOOT_FLASH)
504 // Ughh - poor man's sprintf of "pci%04x,%04x.rom"
505 *(u32*)fname = 0x20696370; // "pci "
506 *(u32*)&fname[3] = hexify4(vendev);
508 *(u32*)&fname[8] = hexify4(vendev >> 16);
509 *(u32*)&fname[12] = 0x6d6f722e; // ".rom"
512 return cbfs_copyfile(dst, maxlen, fname);
515 // Copy the next file with the given prefix - starting at pos 'last'.
517 cbfs_copyfile_prefix(void *dst, u32 maxlen, const char *prefix
518 , struct cbfs_file *last)
520 if (! CONFIG_COREBOOT_FLASH)
522 dprintf(3, "Searching CBFS for data file prefix %s\n", prefix);
523 struct cbfs_file *file;
525 file = cbfs_getfirst();
527 file = cbfs_getnext(last);
528 int prefixlen = strlen(prefix);
529 for (; file; file = cbfs_getnext(file)) {
530 if (memcmp(prefix, file->filename, prefixlen) != 0)
532 u32 size = ntohl(file->len);
533 void *src = (void*)file + ntohl(file->offset);
534 int fnamelen = strlen(file->filename);
536 if (fnamelen > 5 && strcmp(&file->filename[fnamelen-5], ".lzma") == 0)
537 rv = ulzma(dst, maxlen, src, size);
539 rv = data_copy(dst, maxlen, src, size);
546 struct cbfs_payload_segment {
555 #define PAYLOAD_SEGMENT_BSS 0x20535342
556 #define PAYLOAD_SEGMENT_ENTRY 0x52544E45
558 #define CBFS_COMPRESS_NONE 0
559 #define CBFS_COMPRESS_LZMA 1
561 struct cbfs_payload {
562 struct cbfs_payload_segment segments[1];
566 cbfs_run_payload(const char *filename)
568 if (! CONFIG_COREBOOT_FLASH)
570 dprintf(1, "Run %s\n", filename);
571 struct cbfs_file *file = cbfs_findfile(filename);
574 struct cbfs_payload *pay = (void*)file + ntohl(file->offset);
575 struct cbfs_payload_segment *seg = pay->segments;
577 void *src = (void*)pay + ntohl(seg->offset);
578 void *dest = (void*)ntohl((u32)seg->load_addr);
579 u32 src_len = ntohl(seg->len);
580 u32 dest_len = ntohl(seg->mem_len);
582 case PAYLOAD_SEGMENT_BSS:
583 dprintf(3, "BSS segment %d@%p\n", dest_len, dest);
584 memset(dest, 0, dest_len);
586 case PAYLOAD_SEGMENT_ENTRY: {
587 dprintf(1, "Calling addr %p\n", dest);
588 void (*func)() = dest;
593 dprintf(3, "Segment %x %d@%p -> %d@%p\n"
594 , seg->type, src_len, src, dest_len, dest);
595 if (seg->compression == htonl(CBFS_COMPRESS_NONE)) {
596 if (src_len > dest_len)
598 memcpy(dest, src, src_len);
599 } else if (CONFIG_LZMA
600 && seg->compression == htonl(CBFS_COMPRESS_LZMA)) {
601 int ret = ulzma(dest, dest_len, src, src_len);
606 dprintf(1, "No support for compression type %x\n"
610 if (dest_len > src_len)
611 memset(dest + src_len, 0, dest_len - src_len);