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cbfs: Allow access to CBFS without a header

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In some cases CBFS does not start with a header but is just a collection
of files. It is possible to support this so long as the size of the CBFS
is provided.

Update the cbfs_init_mem() function to support this.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass 2021-03-15 18:00:12 +13:00
parent 272e62cb83
commit 5536f1285f
3 changed files with 21 additions and 8 deletions
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8
include/cbfs.h
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@ -42,6 +42,8 @@ enum cbfs_filetype {
enum {
CBFS_HEADER_MAGIC = 0x4f524243,
CBFS_SIZE_UNKNOWN = 0xffffffff,
CBFS_ALIGN_SIZE = 0x40,
};
/**
@ -186,11 +188,13 @@ const struct cbfs_cachenode *cbfs_find_file(struct cbfs_priv *cbfs,
* cbfs_init_mem() - Set up a new CBFS
*
* @base: Base address of CBFS
* @size: Size of CBFS if known, else CBFS_SIZE_UNKNOWN
* @require_header: true to read a header at the start, false to not require one
* @cbfsp: Returns a pointer to CBFS on success
* @return 0 if OK, -ve on error
*/
int cbfs_init_mem(ulong base, struct cbfs_priv **privp);
int cbfs_init_mem(ulong base, ulong size, bool require_hdr,
struct cbfs_priv **privp);
/***************************************************************************/
/* All of the functions below can be used without first initializing CBFS. */