cbfs: Allow reading a file from a CBFS given its base addr
Currently we support reading a file from CBFS given the address of the end
of the ROM. Sometimes we only know the start of the CBFS. Add a function
to find a file given that.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
diff --git a/fs/cbfs/cbfs.c b/fs/cbfs/cbfs.c
index ba903d1..d3c3722 100644
--- a/fs/cbfs/cbfs.c
+++ b/fs/cbfs/cbfs.c
@@ -413,6 +413,19 @@
return find_uncached(&priv, name, start, node);
}
+int file_cbfs_find_uncached_base(ulong base, const char *name,
+ struct cbfs_cachenode *node)
+{
+ struct cbfs_priv priv;
+ int ret;
+
+ ret = cbfs_load_header_ptr(&priv, base);
+ if (ret)
+ return ret;
+
+ return find_uncached(&priv, name, (void *)base, node);
+}
+
const char *file_cbfs_name(const struct cbfs_cachenode *file)
{
cbfs_s.result = CBFS_SUCCESS;
diff --git a/include/cbfs.h b/include/cbfs.h
index 5a24878..1aff110 100644
--- a/include/cbfs.h
+++ b/include/cbfs.h
@@ -175,6 +175,20 @@
struct cbfs_cachenode *node);
/**
+ * file_cbfs_find_uncached_base() - Find a file in CBFS given the base address
+ *
+ * Note that @node should be declared by the caller. This design is to avoid
+ * the need for allocation here.
+ *
+ * @base: Points to the base of the CBFS
+ * @name: The name to search for
+ * @node: Returns the contents of the node if found (i.e. copied into *node)
+ * @return 0 on success, -ENOENT if not found, -EFAULT on bad header
+ */
+int file_cbfs_find_uncached_base(ulong base, const char *name,
+ struct cbfs_cachenode *node);
+
+/**
* file_cbfs_name() - Get the name of a file in CBFS.
*
* @file: The handle to the file.