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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2018 Silverback, ltd.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <agesa_headers.h>
#include <amdblocks/image.h>
/* Check if the image has the desired module. */
static bool validate_image(void *module_chain, const char module_signature[8])
{
AMD_MODULE_HEADER *mod_ptr = (AMD_MODULE_HEADER *)module_chain;
uint64_t signature = *(uint64_t *)module_signature;
char *checking_str;
while ((mod_ptr != NULL) &&
(MODULE_SIGNATURE == *(uint32_t *)&mod_ptr->ModuleHeaderSignature)) {
checking_str = (char *)&mod_ptr->ModuleIdentifier;
if (signature == *(uint64_t *)checking_str)
return true;
mod_ptr = (AMD_MODULE_HEADER *)mod_ptr->NextBlock;
}
return false;
}
/*
* Find an image that has the desired module. The image is aligned within
* a given range.
*/
void *amd_find_image(const void *start_address, const void *end_address,
uint32_t alignment, const char name[8])
{
uint8_t *current_ptr = (uint8_t *)start_address;
uint8_t *start = (uint8_t *)start_address;
uint8_t *end = (uint8_t *)end_address;
AMD_IMAGE_HEADER *image_ptr;
while ((current_ptr >= start) && (current_ptr < end)) {
if (IMAGE_SIGNATURE == *((uint32_t *)current_ptr)) {
image_ptr = (AMD_IMAGE_HEADER *) current_ptr;
/* Check if the image has the desired module */
if (validate_image((void *)image_ptr->ModuleInfoOffset,
name))
return current_ptr;
}
current_ptr += alignment;
}
return NULL;
}
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