2 * Copyright (c) 2011 The Chromium OS Authors. All rights reserved.
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License as
6 * published by the Free Software Foundation; either version 2 of
7 * the License, or (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
24 #include <linux/compiler.h>
35 CBFS_TYPE_STAGE = 0x10,
36 CBFS_TYPE_PAYLOAD = 0x20,
37 CBFS_TYPE_OPTIONROM = 0x30,
38 CBFS_TYPE_BOOTSPLASH = 0x40,
42 CBFS_TYPE_MICROCODE = 0x53,
43 CBFS_COMPONENT_CMOS_DEFAULT = 0xaa,
44 CBFS_COMPONENT_CMOS_LAYOUT = 0x01aa
57 struct cbfs_fileheader {
65 struct cbfs_cachenode {
66 struct cbfs_cachenode *next;
75 extern enum cbfs_result file_cbfs_result;
78 * file_cbfs_error() - Return a string describing the most recent error
81 * @return A pointer to the constant string.
83 const char *file_cbfs_error(void);
86 * file_cbfs_init() - Initialize the CBFS driver and load metadata into RAM.
88 * @end_of_rom: Points to the end of the ROM the CBFS should be read
91 void file_cbfs_init(uintptr_t end_of_rom);
94 * file_cbfs_get_header() - Get the header structure for the current CBFS.
96 * @return A pointer to the constant structure, or NULL if there is none.
98 const struct cbfs_header *file_cbfs_get_header(void);
101 * file_cbfs_get_first() - Get a handle for the first file in CBFS.
103 * @return A handle for the first file in CBFS, NULL on error.
105 const struct cbfs_cachenode *file_cbfs_get_first(void);
108 * file_cbfs_get_next() - Get a handle to the file after this one in CBFS.
110 * @file: A pointer to the handle to advance.
112 void file_cbfs_get_next(const struct cbfs_cachenode **file);
115 * file_cbfs_find() - Find a file with a particular name in CBFS.
117 * @name: The name to search for.
119 * @return A handle to the file, or NULL on error.
121 const struct cbfs_cachenode *file_cbfs_find(const char *name);
124 /***************************************************************************/
125 /* All of the functions below can be used without first initializing CBFS. */
126 /***************************************************************************/
129 * file_cbfs_find_uncached() - Find a file with a particular name in CBFS
130 * without using the heap.
132 * @end_of_rom: Points to the end of the ROM the CBFS should be read
134 * @name: The name to search for.
136 * @return A handle to the file, or NULL on error.
138 const struct cbfs_cachenode *file_cbfs_find_uncached(uintptr_t end_of_rom,
142 * file_cbfs_name() - Get the name of a file in CBFS.
144 * @file: The handle to the file.
146 * @return The name of the file, NULL on error.
148 const char *file_cbfs_name(const struct cbfs_cachenode *file);
151 * file_cbfs_size() - Get the size of a file in CBFS.
153 * @file: The handle to the file.
155 * @return The size of the file, zero on error.
157 u32 file_cbfs_size(const struct cbfs_cachenode *file);
160 * file_cbfs_type() - Get the type of a file in CBFS.
162 * @file: The handle to the file.
164 * @return The type of the file, zero on error.
166 u32 file_cbfs_type(const struct cbfs_cachenode *file);
169 * file_cbfs_read() - Read a file from CBFS into RAM
171 * @file: A handle to the file to read.
172 * @buffer: Where to read it into memory.
173 * @maxsize: Maximum number of bytes to read
175 * @return If positive or zero, the number of characters read. If negative, an
178 long file_cbfs_read(const struct cbfs_cachenode *file, void *buffer,
179 unsigned long maxsize);
181 #endif /* __CBFS_H */