--- /dev/null
+// 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 "memmap.h" // add_e820
+#include "util.h" // dprintf
+#include "biosvar.h" // GET_EBDA
+#include "lzmadecode.h" // LzmaDecode
+#include "smbios.h" // smbios_init
+#include "boot.h" // boot_add_cbfs
+
+
+/****************************************************************
+ * 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
+
+static u16
+ipchksum(char *buf, int count)
+{
+ u16 *p = (u16*)buf;
+ u32 sum = 0;
+ while (count > 1) {
+ sum += *p++;
+ count -= 2;
+ }
+ if (count)
+ sum += *(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(char *addr, int len)
+{
+ char *end = addr + len;
+ for (; addr < end; addr += 16) {
+ struct cb_header *cbh = (struct cb_header *)addr;
+ if (cbh->signature != CB_SIGNATURE)
+ continue;
+ if (! cbh->table_bytes)
+ continue;
+ if (ipchksum(addr, sizeof(*cbh)) != 0)
+ continue;
+ if (ipchksum(addr + sizeof(*cbh), cbh->table_bytes)
+ != cbh->table_checksum)
+ continue;
+ return cbh;
+ }
+ return NULL;
+}
+
+// Try to find the coreboot memory table in the given coreboot table.
+static void *
+find_cb_subtable(struct cb_header *cbh, u32 tag)
+{
+ char *tbl = (char *)cbh + sizeof(*cbh);
+ int i;
+ for (i=0; i<cbh->table_entries; i++) {
+ struct cb_memory *cbm = (struct cb_memory *)tbl;
+ tbl += cbm->size;
+ if (cbm->tag == tag)
+ return cbm;
+ }
+ return NULL;
+}
+
+static struct cb_memory *CBMemTable;
+const char *CBvendor, *CBpart;
+
+// Populate max ram and e820 map info by scanning for a coreboot table.
+static void
+coreboot_fill_map(void)
+{
+ dprintf(3, "Attempting to find coreboot table\n");
+
+ // Find coreboot table.
+ struct cb_header *cbh = find_cb_header(0, 0x1000);
+ if (!cbh)
+ goto fail;
+ struct cb_forward *cbf = find_cb_subtable(cbh, CB_TAG_FORWARD);
+ if (cbf) {
+ dprintf(3, "Found coreboot table forwarder.\n");
+ cbh = find_cb_header((char *)((u32)cbf->forward), 0x100);
+ 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;
+
+ u64 maxram = 0, maxram_over4G = 0;
+ 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;
+ } else if (type == E820_ACPI || type == E820_RAM) {
+ u64 end = m->start + m->size;
+ if (end > 0x100000000ull) {
+ end -= 0x100000000ull;
+ if (end > maxram_over4G)
+ maxram_over4G = end;
+ } else if (end > maxram)
+ maxram = end;
+ }
+ add_e820(m->start, m->size, type);
+ }
+
+ RamSize = maxram;
+ RamSizeOver4G = maxram_over4G;
+
+ // Ughh - coreboot likes to set a map at 0x0000-0x1000, but this
+ // confuses grub. So, override it.
+ add_e820(0, 16*1024, E820_RAM);
+
+ 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");
+ RamSize = 16*1024*1024;
+ RamSizeOver4G = 0;
+ add_e820(0, 16*1024*1024, E820_RAM);
+ return;
+}
+
+
+/****************************************************************
+ * 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_pir(p);
+ copy_mptable(p);
+ copy_acpi_rsdp(p);
+ copy_smbios(p);
+ }
+}
+
+void
+coreboot_copy_biostable(void)
+{
+ struct cb_memory *cbm = CBMemTable;
+ if (! CONFIG_COREBOOT || !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);
+ }
+
+ // XXX - create a dummy smbios table for now.
+ if (!SMBiosAddr)
+ smbios_init();
+}
+
+
+/****************************************************************
+ * 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_HEADPTR_ADDR 0xFFFFFFFc
+#define CBFS_VERSION1 0x31313131
+
+struct cbfs_header {
+ u32 magic;
+ u32 version;
+ u32 romsize;
+ u32 bootblocksize;
+ u32 align;
+ u32 offset;
+ u32 pad[2];
+} PACKED;
+
+static struct cbfs_header *CBHDR;
+
+static void
+cbfs_setup(void)
+{
+ if (!CONFIG_COREBOOT || !CONFIG_COREBOOT_FLASH)
+ return;
+
+ CBHDR = *(void **)CBFS_HEADPTR_ADDR;
+ if (CBHDR->magic != htonl(CBFS_HEADER_MAGIC)) {
+ dprintf(1, "Unable to find CBFS (ptr=%p; got %x not %x)\n"
+ , CBHDR, CBHDR->magic, htonl(CBFS_HEADER_MAGIC));
+ CBHDR = NULL;
+ return;
+ }
+
+ dprintf(1, "Found CBFS header at %p\n", CBHDR);
+}
+
+#define CBFS_FILE_MAGIC 0x455649484352414cLL // LARCHIVE
+
+struct cbfs_file {
+ u64 magic;
+ u32 len;
+ u32 type;
+ u32 checksum;
+ u32 offset;
+ char filename[0];
+} PACKED;
+
+// Verify a cbfs entry looks valid.
+static struct cbfs_file *
+cbfs_verify(struct cbfs_file *file)
+{
+ if (file < (struct cbfs_file *)(0xFFFFFFFF - ntohl(CBHDR->romsize)))
+ return NULL;
+ u64 magic = file->magic;
+ if (magic == CBFS_FILE_MAGIC) {
+ dprintf(5, "Found CBFS file %s\n", file->filename);
+ return file;
+ }
+ return NULL;
+}
+
+// Return the first file in the CBFS archive
+static struct cbfs_file *
+cbfs_getfirst(void)
+{
+ if (! CBHDR)
+ return NULL;
+ return cbfs_verify((void *)(0 - ntohl(CBHDR->romsize) + ntohl(CBHDR->offset)));
+}
+
+// Return the file after the given file.
+static struct cbfs_file *
+cbfs_getnext(struct cbfs_file *file)
+{
+ file = (void*)file + ALIGN(ntohl(file->len) + ntohl(file->offset), ntohl(CBHDR->align));
+ return cbfs_verify(file);
+}
+
+// Find the file with the given filename.
+struct cbfs_file *
+cbfs_findfile(const char *fname)
+{
+ dprintf(3, "Searching CBFS for %s\n", fname);
+ struct cbfs_file *file;
+ for (file = cbfs_getfirst(); file; file = cbfs_getnext(file))
+ if (strcmp(fname, file->filename) == 0)
+ return file;
+ return NULL;
+}
+
+// Find next file with the given filename prefix.
+struct cbfs_file *
+cbfs_findprefix(const char *prefix, struct cbfs_file *last)
+{
+ if (!CONFIG_COREBOOT || !CONFIG_COREBOOT_FLASH)
+ return NULL;
+
+ dprintf(3, "Searching CBFS for prefix %s\n", prefix);
+ int len = strlen(prefix);
+ struct cbfs_file *file;
+ if (! last)
+ file = cbfs_getfirst();
+ else
+ file = cbfs_getnext(last);
+ for (; file; file = cbfs_getnext(file))
+ if (memcmp(prefix, file->filename, len) == 0)
+ return file;
+ return NULL;
+}
+
+// Find a file with the given filename (possibly with ".lzma" extension).
+struct cbfs_file *
+cbfs_finddatafile(const char *fname)
+{
+ int fnlen = strlen(fname);
+ struct cbfs_file *file = NULL;
+ for (;;) {
+ file = cbfs_findprefix(fname, file);
+ if (!file)
+ return NULL;
+ if (file->filename[fnlen] == '\0'
+ || strcmp(&file->filename[fnlen], ".lzma") == 0)
+ return file;
+ }
+}
+
+// Determine whether the file has a ".lzma" extension.
+static int
+cbfs_iscomp(struct cbfs_file *file)
+{
+ int fnamelen = strlen(file->filename);
+ return fnamelen > 5 && strcmp(&file->filename[fnamelen-5], ".lzma") == 0;
+}
+
+// Return the filename of a given file.
+const char *
+cbfs_filename(struct cbfs_file *file)
+{
+ return file->filename;
+}
+
+// Determine the uncompressed size of a datafile.
+u32
+cbfs_datasize(struct cbfs_file *file)
+{
+ void *src = (void*)file + ntohl(file->offset);
+ if (cbfs_iscomp(file))
+ return *(u32*)(src + LZMA_PROPERTIES_SIZE);
+ return ntohl(file->len);
+}
+
+// Copy a file to memory (uncompressing if necessary)
+int
+cbfs_copyfile(struct cbfs_file *file, void *dst, u32 maxlen)
+{
+ if (!CONFIG_COREBOOT || !CONFIG_COREBOOT_FLASH || !file)
+ return -1;
+
+ u32 size = ntohl(file->len);
+ void *src = (void*)file + ntohl(file->offset);
+ if (cbfs_iscomp(file)) {
+ // Compressed - copy to temp ram and uncompress it.
+ void *temp = malloc_tmphigh(size);
+ if (!temp)
+ 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;
+}
+
+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 *file)
+{
+ if (!CONFIG_COREBOOT || !CONFIG_COREBOOT_FLASH || !file)
+ return;
+ dprintf(1, "Run %s\n", file->filename);
+ struct cbfs_payload *pay = (void*)file + ntohl(file->offset);
+ struct cbfs_payload_segment *seg = pay->segments;
+ for (;;) {
+ void *src = (void*)pay + ntohl(seg->offset);
+ void *dest = (void*)ntohl((u32)seg->load_addr);
+ u32 src_len = ntohl(seg->len);
+ u32 dest_len = ntohl(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)() = dest;
+ func();
+ return;
+ }
+ default:
+ dprintf(3, "Segment %x %d@%p -> %d@%p\n"
+ , seg->type, src_len, src, dest_len, dest);
+ if (seg->compression == htonl(CBFS_COMPRESS_NONE)) {
+ if (src_len > dest_len)
+ src_len = dest_len;
+ memcpy(dest, src, src_len);
+ } else if (CONFIG_LZMA
+ && seg->compression == htonl(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)
+{
+ struct cbfs_file *file = NULL;
+ for (;;) {
+ file = cbfs_findprefix("img/", file);
+ if (!file)
+ break;
+ const char *filename = cbfs_filename(file);
+ char *desc = znprintf(MAXDESCSIZE, "Payload [%s]", &filename[4]);
+ boot_add_cbfs(file, desc, bootprio_find_named_rom(filename, 0));
+ }
+}
+
+void
+coreboot_setup(void)
+{
+ coreboot_fill_map();
+ cbfs_setup();
+}
