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-rw-r--r--src/coreboot.c195
1 files changed, 103 insertions, 92 deletions
diff --git a/src/coreboot.c b/src/coreboot.c
index 82c9f8a5..16f906a6 100644
--- a/src/coreboot.c
+++ b/src/coreboot.c
@@ -311,6 +311,7 @@ coreboot_copy_biostable()
* ulzma
****************************************************************/
+// Uncompress data in flash to an area of memory.
static int
ulzma(u8 *dst, u32 maxlen, const u8 *src, u32 srclen)
{
@@ -398,99 +399,140 @@ struct cbfs_file {
char filename[0];
} PACKED;
+// Verify a cbfs entry looks valid.
static struct cbfs_file *
-cbfs_search(struct cbfs_file *file)
+cbfs_verify(struct cbfs_file *file)
{
- for (;;) {
- 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;
- }
- if (magic == 0)
- return NULL;
- file = (void*)file + ntohl(CBHDR->align);
+ 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()
{
if (! CBHDR)
return NULL;
- return cbfs_search((void *)(0 - ntohl(CBHDR->romsize) + ntohl(CBHDR->offset)));
+ 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_search(file);
+ return cbfs_verify(file);
}
-static struct cbfs_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)) {
+ for (file = cbfs_getfirst(); file; file = cbfs_getnext(file))
if (strcmp(fname, file->filename) == 0)
return file;
- }
return NULL;
}
-static int
-data_copy(u8 *dst, u32 maxlen, const u8 *src, u32 srclen)
+struct cbfs_file *
+cbfs_findprefix(const char *prefix, struct cbfs_file *last)
{
- dprintf(3, "Copying data %d@%p to %d@%p\n", srclen, src, maxlen, dst);
- if (srclen > maxlen) {
- dprintf(1, "File too big to copy\n");
- return -1;
- }
- memcpy(dst, src, srclen);
- return srclen;
+ if (! 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;
}
-// Copy a file to memory (uncompressing if necessary)
-static int
-cbfs_copyfile(void *dst, u32 maxlen, const char *fname)
+// Find a file with the given filename (possibly with ".lzma" extension).
+static struct cbfs_file *
+cbfs_finddatafile(const char *fname, int *iscomp)
{
- dprintf(3, "Searching CBFS for data file %s\n", fname);
int fnlen = strlen(fname);
- struct cbfs_file *file;
- for (file = cbfs_getfirst(); file; file = cbfs_getnext(file)) {
- if (memcmp(fname, file->filename, fnlen) != 0)
- continue;
- u32 size = ntohl(file->len);
- void *src = (void*)file + ntohl(file->offset);
- if (file->filename[fnlen] == '\0')
- return data_copy(dst, maxlen, src, size);
- if (strcmp(&file->filename[fnlen], ".lzma") == 0)
- return ulzma(dst, maxlen, src, size);
+ struct cbfs_file *file = NULL;
+ for (;;) {
+ file = cbfs_findprefix(fname, file);
+ if (!file)
+ return NULL;
+ if (file->filename[fnlen] == '\0') {
+ *iscomp = 0;
+ return file;
+ }
+ if (strcmp(&file->filename[fnlen], ".lzma") == 0) {
+ *iscomp = 1;
+ return file;
+ }
}
- return -1;
}
-const char *
-cbfs_findNprefix(const char *prefix, int n)
+// Locate a datafile with the given prefix.
+struct cbfs_file *
+cbfs_finddataprefix(const char *prefix, struct cbfs_file *last, int *iscomp)
{
- if (! CONFIG_COREBOOT_FLASH)
+ struct cbfs_file *file = cbfs_findprefix(prefix, last);
+ if (!file)
return NULL;
+ int fnamelen = strlen(file->filename);
+ *iscomp = (fnamelen > 5
+ && strcmp(&file->filename[fnamelen-5], ".lzma") == 0);
+ return file;
+}
- dprintf(3, "Searching CBFS for prefix %s\n", prefix);
- int len = strlen(prefix);
- struct cbfs_file *file;
- for (file = cbfs_getfirst(); file; file = cbfs_getnext(file)) {
- if (memcmp(prefix, file->filename, len) == 0) {
- if (n <= 0)
- return file->filename;
- n--;
- }
+// 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.
+int
+cbfs_datasize(struct cbfs_file *file, int iscomp)
+{
+ void *src = (void*)file + ntohl(file->offset);
+ if (iscomp)
+ 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, int iscomp)
+{
+ if (! CONFIG_COREBOOT_FLASH || !file)
+ return -1;
+
+ u32 size = ntohl(file->len);
+ void *src = (void*)file + ntohl(file->offset);
+ if (iscomp)
+ // Compressed.
+ return ulzma(dst, maxlen, src, size);
+
+ // Not compressed.
+ dprintf(3, "Copying data %d@%p to %d@%p\n", size, src, maxlen, dst);
+ if (size > maxlen) {
+ dprintf(1, "File too big to copy\n");
+ return -1;
}
- return NULL;
+ memcpy(dst, src, size);
+ return size;
}
static char
@@ -510,6 +552,7 @@ hexify4(u16 x)
| (getHex(x>>12)));
}
+// Find and copy the optionrom for the given vendor/device id.
int
cbfs_copy_optionrom(void *dst, u32 maxlen, u32 vendev)
{
@@ -525,38 +568,9 @@ cbfs_copy_optionrom(void *dst, u32 maxlen, u32 vendev)
*(u32*)&fname[12] = 0x6d6f722e; // ".rom"
fname[16] = '\0';
- return cbfs_copyfile(dst, maxlen, fname);
-}
-
-// Copy the next file with the given prefix - starting at pos 'last'.
-struct cbfs_file *
-cbfs_copyfile_prefix(void *dst, u32 maxlen, const char *prefix
- , struct cbfs_file *last)
-{
- if (! CONFIG_COREBOOT_FLASH)
- return NULL;
- dprintf(3, "Searching CBFS for data file prefix %s\n", prefix);
- struct cbfs_file *file;
- if (! last)
- file = cbfs_getfirst();
- else
- file = cbfs_getnext(last);
- int prefixlen = strlen(prefix);
- for (; file; file = cbfs_getnext(file)) {
- if (memcmp(prefix, file->filename, prefixlen) != 0)
- continue;
- u32 size = ntohl(file->len);
- void *src = (void*)file + ntohl(file->offset);
- int fnamelen = strlen(file->filename);
- int rv;
- if (fnamelen > 5 && strcmp(&file->filename[fnamelen-5], ".lzma") == 0)
- rv = ulzma(dst, maxlen, src, size);
- else
- rv = data_copy(dst, maxlen, src, size);
- if (rv >= 0)
- return file;
- }
- return NULL;
+ int iscomp;
+ struct cbfs_file *file = cbfs_finddatafile(fname, &iscomp);
+ return cbfs_copyfile(file, dst, maxlen, iscomp);
}
struct cbfs_payload_segment {
@@ -579,14 +593,11 @@ struct cbfs_payload {
};
void
-cbfs_run_payload(const char *filename)
+cbfs_run_payload(struct cbfs_file *file)
{
- if (! CONFIG_COREBOOT_FLASH)
- return;
- dprintf(1, "Run %s\n", filename);
- struct cbfs_file *file = cbfs_findfile(filename);
- if (!file)
+ if (!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 (;;) {
generated by cgit (git 2.34.1) at 2025-02-23 18:05:14 +0000