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/* SPDX-License-Identifier: GPL-2.0-only */
#include <string.h>
#include <cbmem.h>
#include <console/console.h>
#include <mrc_cache.h>
#include <northbridge/amd/agesa/state_machine.h>
#include <AGESA.h>
#include <northbridge/amd/agesa/agesa_helper.h>
/* Training data versioning is not supported or tracked. */
#define DEFAULT_MRC_VERSION 0
AGESA_STATUS OemInitResume(AMD_S3_PARAMS *dataBlock)
{
void *nv_storage = NULL;
size_t nv_storage_size = 0;
nv_storage = mrc_cache_current_mmap_leak(MRC_TRAINING_DATA, DEFAULT_MRC_VERSION,
&nv_storage_size);
if (nv_storage == NULL || nv_storage_size == 0) {
printk(BIOS_ERR, "%s: No valid MRC cache!\n", __func__);
return AGESA_CRITICAL;
}
dataBlock->NvStorage = nv_storage;
dataBlock->NvStorageSize = nv_storage_size;
return AGESA_SUCCESS;
}
AGESA_STATUS OemS3LateRestore(AMD_S3_PARAMS *dataBlock)
{
char *heap = cbmem_find(CBMEM_ID_RESUME_SCRATCH);
if (heap == NULL)
return AGESA_FATAL;
printk(BIOS_DEBUG, "Using resume HEAP at %08x\n",
(unsigned int)(uintptr_t)heap);
/* Return allocated CBMEM size, we do not keep track of
* how much was actually used.
*/
dataBlock->VolatileStorageSize = HIGH_MEMORY_SCRATCH;
dataBlock->VolatileStorage = heap;
return AGESA_SUCCESS;
}
AGESA_STATUS OemS3Save(AMD_S3_PARAMS *dataBlock)
{
if (mrc_cache_stash_data(MRC_TRAINING_DATA, DEFAULT_MRC_VERSION,
dataBlock->NvStorage, dataBlock->NvStorageSize) < 0) {
printk(BIOS_ERR, "%s: Failed to stash MRC data\n", __func__);
return AGESA_CRITICAL;
}
/* To be consumed in AmdS3LateRestore. */
char *heap = cbmem_add(CBMEM_ID_RESUME_SCRATCH, HIGH_MEMORY_SCRATCH);
if (heap) {
memset(heap, 0, HIGH_MEMORY_SCRATCH);
memcpy(heap, dataBlock->VolatileStorage, dataBlock->VolatileStorageSize);
}
/* Collect MTRR setup. */
backup_mtrr();
return AGESA_SUCCESS;
}
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