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/*
* Copyright (c) 2011 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*
* 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.
*/
#include <common.h>
#include <chromeos/common.h>
#include <chromeos/gbb.h>
#include <gbb_header.h>
#define PREFIX "gbb: "
int gbb_init(read_buf_type gbb, firmware_storage_t *file, uint32_t gbb_offset)
{
#ifndef CONFIG_HARDWARE_MAPPED_SPI
GoogleBinaryBlockHeader *gbbh = (GoogleBinaryBlockHeader *)gbb;
if (file->read(file, gbb_offset, sizeof(*gbbh), gbbh)) {
VBDEBUG(PREFIX "failed to read GBB header\n");
return 1;
}
if (file->read(file, gbb_offset + gbbh->hwid_offset,
gbbh->hwid_size,
gbb + gbbh->hwid_offset)) {
VBDEBUG(PREFIX "failed to read hwid\n");
return 1;
}
if (file->read(file, gbb_offset + gbbh->rootkey_offset,
gbbh->rootkey_size,
gbb + gbbh->rootkey_offset)) {
VBDEBUG(PREFIX "failed to read root key\n");
return 1;
}
#else
if (file->read(file, gbb_offset,
sizeof(GoogleBinaryBlockHeader), gbb)) {
VBDEBUG(PREFIX "failed to read GBB header\n");
return 1;
}
#endif
return 0;
}
#ifndef CONFIG_HARDWARE_MAPPED_SPI
int gbb_read_bmp_block(void *gbb, firmware_storage_t *file, uint32_t gbb_offset)
{
GoogleBinaryBlockHeader *gbbh = (GoogleBinaryBlockHeader *)gbb;
if (file->read(file, gbb_offset + gbbh->bmpfv_offset,
gbbh->bmpfv_size,
gbb + gbbh->bmpfv_offset)) {
VBDEBUG(PREFIX "failed to read bmp block\n");
return 1;
}
return 0;
}
int gbb_read_recovery_key(void *gbb,
firmware_storage_t *file, uint32_t gbb_offset)
{
GoogleBinaryBlockHeader *gbbh = (GoogleBinaryBlockHeader *)gbb;
if (file->read(file, gbb_offset + gbbh->recovery_key_offset,
gbbh->recovery_key_size,
gbb + gbbh->recovery_key_offset)) {
VBDEBUG(PREFIX "failed to read recovery key\n");
return 1;
}
return 0;
}
#endif
int gbb_check_integrity(uint8_t *gbb)
{
/*
* Avoid a second "$GBB" signature in the binary. Some utility programs
* that parses the contents of firmware image could fail if there are
* multiple signatures.
*/
if (gbb[0] == '$' && gbb[1] == 'G' && gbb[2] == 'B' && gbb[3] == 'B')
return 0;
else
return 1;
}
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