coreboot-kgpe-d16/util/cbfstool/flashmap/fmap.h

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/*
* Copyright 2015, Google Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2 as published by the Free
* Software Foundation.
*/
#ifndef FLASHMAP_LIB_FMAP_H__
#define FLASHMAP_LIB_FMAP_H__
#include <inttypes.h>
#include <valstr.h>
#define FMAP_SIGNATURE "__FMAP__"
#define FMAP_VER_MAJOR 1 /* this header's FMAP minor version */
#define FMAP_VER_MINOR 1 /* this header's FMAP minor version */
#define FMAP_STRLEN 32 /* maximum length for strings, */
/* including null-terminator */
extern const struct valstr flag_lut[16];
enum fmap_flags {
FMAP_AREA_STATIC = 1 << 0,
FMAP_AREA_COMPRESSED = 1 << 1,
FMAP_AREA_RO = 1 << 2,
FMAP_AREA_PRESERVE = 1 << 3,
};
/* Mapping of volatile and static regions in firmware binary */
struct fmap_area {
uint32_t offset; /* offset relative to base */
uint32_t size; /* size in bytes */
uint8_t name[FMAP_STRLEN]; /* descriptive name */
uint16_t flags; /* flags for this area */
} __packed;
struct fmap {
uint8_t signature[8]; /* "__FMAP__" (0x5F5F464D41505F5F) */
uint8_t ver_major; /* major version */
uint8_t ver_minor; /* minor version */
uint64_t base; /* address of the firmware binary */
uint32_t size; /* size of firmware binary in bytes */
uint8_t name[FMAP_STRLEN]; /* name of this firmware binary */
uint16_t nareas; /* number of areas described by
fmap_areas[] below */
struct fmap_area areas[];
} __packed;
/*
* fmap_find - find FMAP signature in a binary image
*
* @image: binary image
* @len: length of binary image
*
* This function does no error checking. The caller is responsible for
* verifying that the contents are sane.
*
* returns offset of FMAP signature to indicate success
* returns <0 to indicate failure
*/
extern long int fmap_find(const uint8_t *image, unsigned int len);
/*
* fmap_print - Print contents of flash map data structure
*
* @map: raw map data
*
* returns 0 to indicate success
* returns <0 to indicate failure
*/
extern int fmap_print(const struct fmap *map);
/*
* fmap_flags_to_string - convert raw flags field into user-friendly string
*
* @flags: raw flags
*
* This function returns a user-friendly comma-separated list of fmap area
* flags. If there are no flags (flags == 0), the string will contain only
* a terminating character ('\0')
*
* This function allocates memory which the caller must free.
*
* returns pointer to an allocated string if successful
* returns NULL to indicate failure
*/
char *fmap_flags_to_string(uint16_t flags);
/*
* fmap_create - allocate and initialize a new fmap structure
*
* @base: base address of firmware within address space
* @size: size of the firmware (bytes)
* @name: name of firmware
*
* This function will allocate a flashmap header. Members of the structure
* which are not passed in are automatically initialized.
*
* returns pointer to newly allocated flashmap header if successful
* returns NULL to indicate failure
*/
extern struct fmap *fmap_create(uint64_t base,
uint32_t size, uint8_t *name);
/* free memory used by an fmap structure */
extern void fmap_destroy(struct fmap *fmap);
/*
* fmap_size - returns size of fmap data structure (including areas)
*
* @fmap: fmap
*
* returns size of fmap structure if successful
* returns <0 to indicate failure
*/
extern int fmap_size(const struct fmap *fmap);
/*
* fmap_append_area - realloc an existing flashmap and append an area
*
* @fmap: double pointer to existing flashmap
* @offset: offset of area
* @size: size of area
* @name: name of area
* @flags: area flags
*
* returns total size of reallocated flashmap structure if successful
* returns <0 to indicate failure
*/
extern int fmap_append_area(struct fmap **fmap,
uint32_t offset, uint32_t size,
const uint8_t *name, uint16_t flags);
/*
* fmap_find_area - find an fmap_area entry (by name) and return pointer to it
*
* @fmap: fmap structure to parse
* @name: name of area to find
*
* returns a pointer to the entry in the fmap structure if successful
* returns NULL to indicate failure or if no matching area entry is found
*/
cbfstool: Restructure around support for reading/writing portions of files The buffer API that cbfstool uses to read and write files only directly supports one-shot operations on whole files. This adds an intermediate partitioned_file module that sits on top of the buffer system and has an awareness of FMAP entries. It provides an easy way to get a buffer for an individual region of a larger image file based on FMAP section name, as well as incrementally write those smaller buffers back to the backing file at the appropriate offset. The module has two distinct modes of operation: - For new images whose layout is described exclusively by an FMAP section, all the aforementioned functionality will be available. - For images in the current format, where the CBFS master header serves as the root of knowledge of the image's size and layout, the module falls back to a legacy operation mode, where it only allows manipulation of the entire image as one unit, but exposes this support through the same interface by mapping the region named SECTION_NAME_PRIMARY_CBFS ("COREBOOT") to the whole file. The tool is presently only ported onto the new module running in legacy mode: higher-level support for true "partitioned" images will be forthcoming. However, as part of this change, the crusty cbfs_image_from_file() and cbfs_image_write_file() abstractions are removed and replaced with a single cbfs_image function, cbfs_image_from_buffer(), as well as centralized image reading/writing directly in cbfstool's main() function. This reduces the boilerplate required to implement each new action, makes the create action much more similar to the others, and will make implementing additional actions and adding in support for the new format much easier. BUG=chromium:470407 TEST=Build panther and nyan_big coreboot.rom images with and without this patch and diff their hexdumps. Ensure that no differences occur at different locations from the diffs between subsequent builds of an identical source tree. Then flash a full new build onto nyan_big and watch it boot normally. BRANCH=None Change-Id: I25578c7b223bc8434c3074cb0dd8894534f8c500 Signed-off-by: Sol Boucher <solb@chromium.org> Original-Commit-Id: 7e1c96a48e7a27fc6b90289d35e6e169d5e7ad20 Original-Change-Id: Ia4a1a4c48df42b9ec2d6b9471b3a10eb7b24bb39 Original-Signed-off-by: Sol Boucher <solb@chromium.org> Original-Reviewed-on: https://chromium-review.googlesource.com/265581 Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org> Reviewed-on: http://review.coreboot.org/10134 Tested-by: build bot (Jenkins) Reviewed-by: Patrick Georgi <pgeorgi@google.com>
2015-03-25 21:40:08 +01:00
extern const struct fmap_area *fmap_find_area(const struct fmap *fmap,
const char *name);
/* unit testing stuff */
extern int fmap_test(void);
#endif /* FLASHMAP_LIB_FMAP_H__*/