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/* Copyright 2010, 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.
*
* Ported from mosys project (http://code.google.com/p/mosys/)
*
* The fmap document can be found in
* http://code.google.com/p/flashmap/wiki/FmapSpec.
*/
#include <assert.h>
#include <ctype.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <inttypes.h>
#include "lib/lib_vpd.h"
#include "lib/fmap.h"
void fmapNormalizeAreaName(uint8_t *name) {
assert(name);
while (*name) {
if (!(isascii(*name) && (isalnum(*name) || *name == ' '))) {
*name = '_';
}
name++;
}
}
off_t fmapFind(const uint8_t *image, size_t image_len) {
off_t offset;
uint64_t sig;
assert(sizeof(sig) == strlen(FMAP_SIGNATURE));
memcpy(&sig, FMAP_SIGNATURE, strlen(FMAP_SIGNATURE));
/* Find 4-byte aligned FMAP signature within image.
* According to fmap document, http://code.google.com/p/flashmap/wiki/FmapSpec
* fmap 1.01 changes to use 64-byte alignment, but 1.00 used 4-byte.
* For backward-compatible, uses 4-byte alignment to search.
*/
for (offset = 0; offset + sizeof(sig) <= image_len; offset += 4) {
if (0 == memcmp(&image[offset], &sig, sizeof(sig))) {
break;
}
}
if (offset + sizeof(sig) <= image_len)
return offset;
else
return -1;
}
/*
* TODO: need more sanity check for fmap.
*/
int fmapGetArea(const char *name, const struct fmap *fmap,
uint32_t *offset, uint32_t *size) {
int i;
assert(offset);
assert(size);
/* traverse whole table */
for (i = 0; i < fmap->nareas; i++) {
if (0 == strcmp(fmap->areas[i].name, name)) {
*offset = fmap->areas[i].offset;
*size = fmap->areas[i].size;
return FMAP_OK;
}
}
return FMAP_FAIL;
}