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* Copyright (c) 2011 The Chromium OS Authors. All rights reserved.
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* SPDX-License-Identifier: GPL-2.0+
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#include <linux/compiler.h>
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CBFS_TYPE_STAGE = 0x10,
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CBFS_TYPE_PAYLOAD = 0x20,
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CBFS_TYPE_OPTIONROM = 0x30,
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CBFS_TYPE_BOOTSPLASH = 0x40,
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CBFS_TYPE_MICROCODE = 0x53,
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CBFS_COMPONENT_CMOS_DEFAULT = 0xaa,
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CBFS_COMPONENT_CMOS_LAYOUT = 0x01aa
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struct cbfs_fileheader {
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struct cbfs_cachenode {
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struct cbfs_cachenode *next;
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extern enum cbfs_result file_cbfs_result;
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* file_cbfs_error() - Return a string describing the most recent error
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* @return A pointer to the constant string.
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const char *file_cbfs_error(void);
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* file_cbfs_init() - Initialize the CBFS driver and load metadata into RAM.
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* @end_of_rom: Points to the end of the ROM the CBFS should be read
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void file_cbfs_init(uintptr_t end_of_rom);
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* file_cbfs_get_header() - Get the header structure for the current CBFS.
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* @return A pointer to the constant structure, or NULL if there is none.
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const struct cbfs_header *file_cbfs_get_header(void);
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* file_cbfs_get_first() - Get a handle for the first file in CBFS.
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* @return A handle for the first file in CBFS, NULL on error.
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const struct cbfs_cachenode *file_cbfs_get_first(void);
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* file_cbfs_get_next() - Get a handle to the file after this one in CBFS.
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* @file: A pointer to the handle to advance.
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void file_cbfs_get_next(const struct cbfs_cachenode **file);
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* file_cbfs_find() - Find a file with a particular name in CBFS.
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* @name: The name to search for.
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* @return A handle to the file, or NULL on error.
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const struct cbfs_cachenode *file_cbfs_find(const char *name);
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/***************************************************************************/
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/* All of the functions below can be used without first initializing CBFS. */
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/***************************************************************************/
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* file_cbfs_find_uncached() - Find a file with a particular name in CBFS
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* without using the heap.
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* @end_of_rom: Points to the end of the ROM the CBFS should be read
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* @name: The name to search for.
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* @return A handle to the file, or NULL on error.
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const struct cbfs_cachenode *file_cbfs_find_uncached(uintptr_t end_of_rom,
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* file_cbfs_name() - Get the name of a file in CBFS.
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* @file: The handle to the file.
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* @return The name of the file, NULL on error.
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const char *file_cbfs_name(const struct cbfs_cachenode *file);
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* file_cbfs_size() - Get the size of a file in CBFS.
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* @file: The handle to the file.
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* @return The size of the file, zero on error.
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u32 file_cbfs_size(const struct cbfs_cachenode *file);
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* file_cbfs_type() - Get the type of a file in CBFS.
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* @file: The handle to the file.
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* @return The type of the file, zero on error.
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u32 file_cbfs_type(const struct cbfs_cachenode *file);
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* file_cbfs_read() - Read a file from CBFS into RAM
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* @file: A handle to the file to read.
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* @buffer: Where to read it into memory.
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* @maxsize: Maximum number of bytes to read
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* @return If positive or zero, the number of characters read. If negative, an
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long file_cbfs_read(const struct cbfs_cachenode *file, void *buffer,
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unsigned long maxsize);
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#endif /* __CBFS_H */