summaryrefslogtreecommitdiffstats
path: root/qemu/roms/seabios/src/fw/coreboot.c
diff options
context:
space:
mode:
Diffstat (limited to 'qemu/roms/seabios/src/fw/coreboot.c')
-rw-r--r--qemu/roms/seabios/src/fw/coreboot.c560
1 files changed, 0 insertions, 560 deletions
diff --git a/qemu/roms/seabios/src/fw/coreboot.c b/qemu/roms/seabios/src/fw/coreboot.c
deleted file mode 100644
index 4fe12928c..000000000
--- a/qemu/roms/seabios/src/fw/coreboot.c
+++ /dev/null
@@ -1,560 +0,0 @@
-// Coreboot interface support.
-//
-// Copyright (C) 2008,2009 Kevin O'Connor <kevin@koconnor.net>
-//
-// This file may be distributed under the terms of the GNU LGPLv3 license.
-
-#include "block.h" // MAXDESCSIZE
-#include "byteorder.h" // be32_to_cpu
-#include "config.h" // CONFIG_*
-#include "e820map.h" // e820_add
-#include "hw/pci.h" // pci_probe_devices
-#include "lzmadecode.h" // LzmaDecode
-#include "malloc.h" // free
-#include "output.h" // dprintf
-#include "paravirt.h" // PlatformRunningOn
-#include "romfile.h" // romfile_findprefix
-#include "stacks.h" // yield
-#include "string.h" // memset
-#include "util.h" // coreboot_preinit
-
-
-/****************************************************************
- * Memory map
- ****************************************************************/
-
-struct cb_header {
- u32 signature;
- u32 header_bytes;
- u32 header_checksum;
- u32 table_bytes;
- u32 table_checksum;
- u32 table_entries;
-};
-
-#define CB_SIGNATURE 0x4f49424C // "LBIO"
-
-struct cb_memory_range {
- u64 start;
- u64 size;
- u32 type;
-};
-
-#define CB_MEM_TABLE 16
-
-struct cb_memory {
- u32 tag;
- u32 size;
- struct cb_memory_range map[0];
-};
-
-#define CB_TAG_MEMORY 0x01
-
-#define MEM_RANGE_COUNT(_rec) \
- (((_rec)->size - sizeof(*(_rec))) / sizeof((_rec)->map[0]))
-
-struct cb_mainboard {
- u32 tag;
- u32 size;
- u8 vendor_idx;
- u8 part_idx;
- char strings[0];
-};
-
-#define CB_TAG_MAINBOARD 0x0003
-
-struct cb_forward {
- u32 tag;
- u32 size;
- u64 forward;
-};
-
-#define CB_TAG_FORWARD 0x11
-
-struct cb_cbmem_ref {
- u32 tag;
- u32 size;
- u64 cbmem_addr;
-};
-
-#define CB_TAG_CBMEM_CONSOLE 0x17
-
-struct cbmem_console {
- u32 buffer_size;
- u32 buffer_cursor;
- u8 buffer_body[0];
-} PACKED;
-static struct cbmem_console *cbcon = NULL;
-
-static u16
-ipchksum(char *buf, int count)
-{
- u16 *p = (u16*)buf;
- u32 sum = 0;
- while (count > 1) {
- sum += GET_FARVAR(0, *p);
- p++;
- count -= 2;
- }
- if (count)
- sum += GET_FARVAR(0, *(u8*)p);
- sum = (sum >> 16) + (sum & 0xffff);
- sum += (sum >> 16);
- return ~sum;
-}
-
-// Try to locate the coreboot header in a given address range.
-static struct cb_header *
-find_cb_header(u32 addr, int len)
-{
- u32 end = addr + len;
- for (; addr < end; addr += 16) {
- struct cb_header *cbh = (void*)addr;
- if (GET_FARVAR(0, cbh->signature) != CB_SIGNATURE)
- continue;
- u32 tsize = GET_FARVAR(0, cbh->table_bytes);
- if (! tsize)
- continue;
- if (ipchksum((void*)addr, sizeof(*cbh)) != 0)
- continue;
- if (ipchksum((void*)addr + sizeof(*cbh), tsize)
- != GET_FARVAR(0, cbh->table_checksum))
- continue;
- return cbh;
- }
- return NULL;
-}
-
-// Try to find the coreboot memory table in the given coreboot table.
-void *
-find_cb_subtable(struct cb_header *cbh, u32 tag)
-{
- char *tbl = (char *)cbh + sizeof(*cbh);
- u32 count = GET_FARVAR(0, cbh->table_entries);
- int i;
- for (i=0; i<count; i++) {
- struct cb_memory *cbm = (void*)tbl;
- tbl += GET_FARVAR(0, cbm->size);
- if (GET_FARVAR(0, cbm->tag) == tag)
- return cbm;
- }
- return NULL;
-}
-
-struct cb_header *
-find_cb_table(void)
-{
- struct cb_header *cbh = find_cb_header(0, 0x1000);
- if (!cbh)
- return NULL;
- struct cb_forward *cbf = find_cb_subtable(cbh, CB_TAG_FORWARD);
- if (cbf) {
- dprintf(3, "Found coreboot table forwarder.\n");
- cbh = find_cb_header(GET_FARVAR(0, cbf->forward), 0x100);
- if (!cbh)
- return NULL;
- }
- return cbh;
-}
-
-static struct cb_memory *CBMemTable;
-const char *CBvendor = "", *CBpart = "";
-
-// Populate max ram and e820 map info by scanning for a coreboot table.
-void
-coreboot_preinit(void)
-{
- if (!CONFIG_COREBOOT)
- return;
-
- dprintf(3, "Attempting to find coreboot table\n");
-
- // Find coreboot table.
- struct cb_header *cbh = find_cb_table();
- if (!cbh)
- goto fail;
- dprintf(3, "Now attempting to find coreboot memory map\n");
- struct cb_memory *cbm = CBMemTable = find_cb_subtable(cbh, CB_TAG_MEMORY);
- if (!cbm)
- goto fail;
-
- int i, count = MEM_RANGE_COUNT(cbm);
- for (i=0; i<count; i++) {
- struct cb_memory_range *m = &cbm->map[i];
- u32 type = m->type;
- if (type == CB_MEM_TABLE)
- type = E820_RESERVED;
- e820_add(m->start, m->size, type);
- }
-
- // Ughh - coreboot likes to set a map at 0x0000-0x1000, but this
- // confuses grub. So, override it.
- e820_add(0, 16*1024, E820_RAM);
-
- struct cb_cbmem_ref *cbref = find_cb_subtable(cbh, CB_TAG_CBMEM_CONSOLE);
- if (cbref) {
- cbcon = (void*)(u32)cbref->cbmem_addr;
- debug_banner();
- dprintf(1, "Found coreboot cbmem console @ %llx\n", cbref->cbmem_addr);
- }
-
- struct cb_mainboard *cbmb = find_cb_subtable(cbh, CB_TAG_MAINBOARD);
- if (cbmb) {
- CBvendor = &cbmb->strings[cbmb->vendor_idx];
- CBpart = &cbmb->strings[cbmb->part_idx];
- dprintf(1, "Found mainboard %s %s\n", CBvendor, CBpart);
- }
-
- return;
-
-fail:
- // No table found.. Use 16Megs as a dummy value.
- dprintf(1, "Unable to find coreboot table!\n");
- e820_add(0, 16*1024*1024, E820_RAM);
- return;
-}
-
-void coreboot_debug_putc(char c)
-{
- if (!CONFIG_DEBUG_COREBOOT)
- return;
- if (!cbcon)
- return;
- u32 cursor = cbcon->buffer_cursor++;
- if (cursor < cbcon->buffer_size)
- cbcon->buffer_body[cursor] = c;
-}
-
-/****************************************************************
- * BIOS table copying
- ****************************************************************/
-
-// Attempt to find (and relocate) any standard bios tables found in a
-// given address range.
-static void
-scan_tables(u32 start, u32 size)
-{
- void *p = (void*)ALIGN(start, 16);
- void *end = (void*)start + size;
- for (; p<end; p += 16)
- copy_table(p);
-}
-
-void
-coreboot_platform_setup(void)
-{
- if (!CONFIG_COREBOOT)
- return;
- pci_probe_devices();
-
- struct cb_memory *cbm = CBMemTable;
- if (!cbm)
- return;
-
- dprintf(3, "Relocating coreboot bios tables\n");
-
- // Scan CB_MEM_TABLE areas for bios tables.
- int i, count = MEM_RANGE_COUNT(cbm);
- for (i=0; i<count; i++) {
- struct cb_memory_range *m = &cbm->map[i];
- if (m->type == CB_MEM_TABLE)
- scan_tables(m->start, m->size);
- }
-
- find_acpi_features();
-}
-
-
-/****************************************************************
- * ulzma
- ****************************************************************/
-
-// Uncompress data in flash to an area of memory.
-static int
-ulzma(u8 *dst, u32 maxlen, const u8 *src, u32 srclen)
-{
- dprintf(3, "Uncompressing data %d@%p to %d@%p\n", srclen, src, maxlen, dst);
- CLzmaDecoderState state;
- int ret = LzmaDecodeProperties(&state.Properties, src, LZMA_PROPERTIES_SIZE);
- if (ret != LZMA_RESULT_OK) {
- dprintf(1, "LzmaDecodeProperties error - %d\n", ret);
- return -1;
- }
- u8 scratch[15980];
- int need = (LzmaGetNumProbs(&state.Properties) * sizeof(CProb));
- if (need > sizeof(scratch)) {
- dprintf(1, "LzmaDecode need %d have %d\n", need, (unsigned int)sizeof(scratch));
- return -1;
- }
- state.Probs = (CProb *)scratch;
-
- u32 dstlen = *(u32*)(src + LZMA_PROPERTIES_SIZE);
- if (dstlen > maxlen) {
- dprintf(1, "LzmaDecode too large (max %d need %d)\n", maxlen, dstlen);
- return -1;
- }
- u32 inProcessed, outProcessed;
- ret = LzmaDecode(&state, src + LZMA_PROPERTIES_SIZE + 8, srclen
- , &inProcessed, dst, dstlen, &outProcessed);
- if (ret) {
- dprintf(1, "LzmaDecode returned %d\n", ret);
- return -1;
- }
- return dstlen;
-}
-
-
-/****************************************************************
- * Coreboot flash format
- ****************************************************************/
-
-#define CBFS_HEADER_MAGIC 0x4F524243
-#define CBFS_VERSION1 0x31313131
-
-struct cbfs_header {
- u32 magic;
- u32 version;
- u32 romsize;
- u32 bootblocksize;
- u32 align;
- u32 offset;
- u32 pad[2];
-} PACKED;
-
-#define CBFS_FILE_MAGIC 0x455649484352414cLL // LARCHIVE
-
-struct cbfs_file {
- u64 magic;
- u32 len;
- u32 type;
- u32 checksum;
- u32 offset;
- char filename[0];
-} PACKED;
-
-struct cbfs_romfile_s {
- struct romfile_s file;
- struct cbfs_file *fhdr;
- void *data;
- u32 rawsize, flags;
-};
-
-// Copy a file to memory (uncompressing if necessary)
-static int
-cbfs_copyfile(struct romfile_s *file, void *dst, u32 maxlen)
-{
- if (!CONFIG_COREBOOT_FLASH)
- return -1;
-
- struct cbfs_romfile_s *cfile;
- cfile = container_of(file, struct cbfs_romfile_s, file);
- u32 size = cfile->rawsize;
- void *src = cfile->data;
- if (cfile->flags) {
- // Compressed - copy to temp ram and uncompress it.
- void *temp = malloc_tmphigh(size);
- if (!temp) {
- warn_noalloc();
- return -1;
- }
- iomemcpy(temp, src, size);
- int ret = ulzma(dst, maxlen, temp, size);
- yield();
- free(temp);
- return ret;
- }
-
- // Not compressed.
- dprintf(3, "Copying data %d@%p to %d@%p\n", size, src, maxlen, dst);
- if (size > maxlen) {
- warn_noalloc();
- return -1;
- }
- iomemcpy(dst, src, size);
- return size;
-}
-
-// Process CBFS links file. The links file is a newline separated
-// file where each line has a "link name" and a "destination name"
-// separated by a space character.
-static void
-process_links_file(void)
-{
- char *links = romfile_loadfile("links", NULL), *next = links;
- while (next) {
- // Parse out linkname and destname
- char *linkname = next;
- next = strchr(linkname, '\n');
- if (next)
- *next++ = '\0';
- char *comment = strchr(linkname, '#');
- if (comment)
- *comment = '\0';
- linkname = nullTrailingSpace(linkname);
- char *destname = strchr(linkname, ' ');
- if (!destname)
- continue;
- *destname++ = '\0';
- destname = nullTrailingSpace(destname);
- // Lookup destname and create new romfile entry for linkname
- struct romfile_s *ufile = romfile_find(destname);
- if (!ufile)
- continue;
- struct cbfs_romfile_s *cufile
- = container_of(ufile, struct cbfs_romfile_s, file);
- struct cbfs_romfile_s *cfile = malloc_tmp(sizeof(*cfile));
- if (!cfile) {
- warn_noalloc();
- break;
- }
- memcpy(cfile, cufile, sizeof(*cfile));
- strtcpy(cfile->file.name, linkname, sizeof(cfile->file.name));
- romfile_add(&cfile->file);
- }
- free(links);
-}
-
-void
-coreboot_cbfs_init(void)
-{
- if (!CONFIG_COREBOOT_FLASH)
- return;
-
- struct cbfs_header *hdr = *(void **)(CONFIG_CBFS_LOCATION - 4);
- if ((u32)hdr & 0x03) {
- dprintf(1, "Invalid CBFS pointer %p\n", hdr);
- return;
- }
- if (CONFIG_CBFS_LOCATION && (u32)hdr > CONFIG_CBFS_LOCATION)
- // Looks like the pointer is relative to CONFIG_CBFS_LOCATION
- hdr = (void*)hdr + CONFIG_CBFS_LOCATION;
- if (hdr->magic != cpu_to_be32(CBFS_HEADER_MAGIC)) {
- dprintf(1, "Unable to find CBFS (ptr=%p; got %x not %x)\n"
- , hdr, hdr->magic, cpu_to_be32(CBFS_HEADER_MAGIC));
- return;
- }
- dprintf(1, "Found CBFS header at %p\n", hdr);
-
- u32 romsize = be32_to_cpu(hdr->romsize);
- u32 romstart = CONFIG_CBFS_LOCATION - romsize;
- struct cbfs_file *fhdr = (void*)romstart + be32_to_cpu(hdr->offset);
- for (;;) {
- if ((u32)fhdr - romstart > romsize)
- break;
- u64 magic = fhdr->magic;
- if (magic != CBFS_FILE_MAGIC)
- break;
- struct cbfs_romfile_s *cfile = malloc_tmp(sizeof(*cfile));
- if (!cfile) {
- warn_noalloc();
- break;
- }
- memset(cfile, 0, sizeof(*cfile));
- strtcpy(cfile->file.name, fhdr->filename, sizeof(cfile->file.name));
- cfile->file.size = cfile->rawsize = be32_to_cpu(fhdr->len);
- cfile->fhdr = fhdr;
- cfile->file.copy = cbfs_copyfile;
- cfile->data = (void*)fhdr + be32_to_cpu(fhdr->offset);
- int len = strlen(cfile->file.name);
- if (len > 5 && strcmp(&cfile->file.name[len-5], ".lzma") == 0) {
- // Using compression.
- cfile->flags = 1;
- cfile->file.name[len-5] = '\0';
- cfile->file.size = *(u32*)(cfile->data + LZMA_PROPERTIES_SIZE);
- }
- romfile_add(&cfile->file);
-
- fhdr = (void*)ALIGN((u32)cfile->data + cfile->rawsize
- , be32_to_cpu(hdr->align));
- }
-
- process_links_file();
-}
-
-struct cbfs_payload_segment {
- u32 type;
- u32 compression;
- u32 offset;
- u64 load_addr;
- u32 len;
- u32 mem_len;
-} PACKED;
-
-#define PAYLOAD_SEGMENT_BSS 0x20535342
-#define PAYLOAD_SEGMENT_ENTRY 0x52544E45
-
-#define CBFS_COMPRESS_NONE 0
-#define CBFS_COMPRESS_LZMA 1
-
-struct cbfs_payload {
- struct cbfs_payload_segment segments[1];
-};
-
-void
-cbfs_run_payload(struct cbfs_file *fhdr)
-{
- if (!CONFIG_COREBOOT_FLASH || !fhdr)
- return;
- dprintf(1, "Run %s\n", fhdr->filename);
- struct cbfs_payload *pay = (void*)fhdr + be32_to_cpu(fhdr->offset);
- struct cbfs_payload_segment *seg = pay->segments;
- for (;;) {
- void *src = (void*)pay + be32_to_cpu(seg->offset);
- void *dest = (void*)(u32)be64_to_cpu(seg->load_addr);
- u32 src_len = be32_to_cpu(seg->len);
- u32 dest_len = be32_to_cpu(seg->mem_len);
- switch (seg->type) {
- case PAYLOAD_SEGMENT_BSS:
- dprintf(3, "BSS segment %d@%p\n", dest_len, dest);
- memset(dest, 0, dest_len);
- break;
- case PAYLOAD_SEGMENT_ENTRY: {
- dprintf(1, "Calling addr %p\n", dest);
- void (*func)(void) = dest;
- func();
- return;
- }
- default:
- dprintf(3, "Segment %x %d@%p -> %d@%p\n"
- , seg->type, src_len, src, dest_len, dest);
- if (seg->compression == cpu_to_be32(CBFS_COMPRESS_NONE)) {
- if (src_len > dest_len)
- src_len = dest_len;
- memcpy(dest, src, src_len);
- } else if (CONFIG_LZMA
- && seg->compression == cpu_to_be32(CBFS_COMPRESS_LZMA)) {
- int ret = ulzma(dest, dest_len, src, src_len);
- if (ret < 0)
- return;
- src_len = ret;
- } else {
- dprintf(1, "No support for compression type %x\n"
- , seg->compression);
- return;
- }
- if (dest_len > src_len)
- memset(dest + src_len, 0, dest_len - src_len);
- break;
- }
- seg++;
- }
-}
-
-// Register payloads in "img/" directory with boot system.
-void
-cbfs_payload_setup(void)
-{
- if (!CONFIG_COREBOOT_FLASH)
- return;
- struct romfile_s *file = NULL;
- for (;;) {
- file = romfile_findprefix("img/", file);
- if (!file)
- break;
- struct cbfs_romfile_s *cfile;
- cfile = container_of(file, struct cbfs_romfile_s, file);
- const char *filename = file->name;
- char *desc = znprintf(MAXDESCSIZE, "Payload [%s]", &filename[4]);
- boot_add_cbfs(cfile->fhdr, desc, bootprio_find_named_rom(filename, 0));
- }
-}