mirror of
https://github.com/brain-hackers/u-boot-brain
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182 lines
4.4 KiB
C
182 lines
4.4 KiB
C
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/*
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* Copyright (c) 2011 The Chromium OS Authors. All rights reserved.
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#ifndef __CBFS_H
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#define __CBFS_H
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#include <compiler.h>
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#include <linux/compiler.h>
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enum cbfs_result {
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CBFS_SUCCESS = 0,
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CBFS_NOT_INITIALIZED,
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CBFS_BAD_HEADER,
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CBFS_BAD_FILE,
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CBFS_FILE_NOT_FOUND
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};
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enum cbfs_filetype {
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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_RAW = 0x50,
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CBFS_TYPE_VSA = 0x51,
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CBFS_TYPE_MBI = 0x52,
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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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};
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struct cbfs_header {
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u32 magic;
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u32 version;
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u32 rom_size;
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u32 boot_block_size;
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u32 align;
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u32 offset;
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u32 pad[2];
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} __packed;
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struct cbfs_fileheader {
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u8 magic[8];
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u32 len;
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u32 type;
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u32 checksum;
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u32 offset;
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} __packed;
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struct cbfs_cachenode {
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struct cbfs_cachenode *next;
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u32 type;
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void *data;
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u32 data_length;
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char *name;
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u32 name_length;
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u32 checksum;
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} __packed;
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extern enum cbfs_result file_cbfs_result;
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/*
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* Return a string describing the most recent error condition.
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*
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* @return A pointer to the constant string.
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*/
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const char *file_cbfs_error(void);
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/*
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* Initialize the CBFS driver and load metadata into RAM.
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*
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* @param end_of_rom Points to the end of the ROM the CBFS should be read
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* from.
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*/
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void file_cbfs_init(uintptr_t end_of_rom);
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/*
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* Get the header structure for the current CBFS.
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*
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* @return A pointer to the constant structure, or NULL if there is none.
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*/
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const struct cbfs_header *file_cbfs_get_header(void);
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/*
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* Get a handle for the first file in CBFS.
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*
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* @return A handle for the first file in CBFS, NULL on error.
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*/
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const struct cbfs_cachenode *file_cbfs_get_first(void);
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/*
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* Get a handle to the file after this one in CBFS.
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*
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* @param file A pointer to the handle to advance.
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*/
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void file_cbfs_get_next(const struct cbfs_cachenode **file);
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/*
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* Find a file with a particular name in CBFS.
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*
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* @param name The name to search for.
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*
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* @return A handle to the file, or NULL on error.
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*/
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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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/*
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* Find a file with a particular name in CBFS without using the heap.
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*
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* @param end_of_rom Points to the end of the ROM the CBFS should be read
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* from.
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* @param name The name to search for.
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*
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* @return A handle to the file, or NULL on error.
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*/
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const struct cbfs_cachenode *file_cbfs_find_uncached(uintptr_t end_of_rom,
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const char *name);
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/*
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* Get the name of a file in CBFS.
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*
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* @param file The handle to the file.
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*
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* @return The name of the file, NULL on error.
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*/
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const char *file_cbfs_name(const struct cbfs_cachenode *file);
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/*
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* Get the size of a file in CBFS.
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*
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* @param file The handle to the file.
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*
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* @return The size of the file, zero on error.
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*/
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u32 file_cbfs_size(const struct cbfs_cachenode *file);
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/*
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* Get the type of a file in CBFS.
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*
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* @param file The handle to the file.
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*
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* @return The type of the file, zero on error.
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*/
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u32 file_cbfs_type(const struct cbfs_cachenode *file);
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/*
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* Read a file from CBFS into RAM
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*
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* @param file A handle to the file to read.
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* @param buffer Where to read it into memory.
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*
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* @return If positive or zero, the number of characters read. If negative, an
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* error occurred.
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*/
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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 */
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