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/* SPDX-License-Identifier: GPL-2.0-only */
#include <device/mmio.h>
#include <stage_cache.h>
#include <mrc_cache.h>
#include <reset.h>
#include <console/console.h>
#include <soc/southbridge.h>
#include <amdblocks/s3_resume.h>
#include <amdblocks/acpi.h>
/* Training data versioning is not supported or tracked. */
#define DEFAULT_MRC_VERSION 0
static void __noreturn reboot_from_resume(const char *message)
{
printk(BIOS_ERR, "%s", message);
set_pm1cnt_s5();
board_reset();
}
AGESA_STATUS OemInitResume(S3_DATA_BLOCK *dataBlock)
{
void *base;
size_t size;
int i;
uint32_t erased = 0xffffffff;
struct region_device rdev;
if (mrc_cache_get_current(MRC_TRAINING_DATA, DEFAULT_MRC_VERSION,
&rdev))
reboot_from_resume("mrc_cache_get_current error, rebooting.\n");
base = rdev_mmap_full(&rdev);
size = region_device_sz(&rdev);
if (!base || !size)
reboot_from_resume("Error: S3 NV data not found, rebooting.\n");
/* Read 16 bytes to infer if the NV has been erased from flash. */
for (i = 0; i < 4; i++)
erased &= read32((uint32_t *)base + i);
if (erased == 0xffffffff)
reboot_from_resume("Error: S3 NV data invalid, rebooting.\n");
dataBlock->NvStorage = base;
dataBlock->NvStorageSize = size;
printk(BIOS_SPEW, "S3 NV data @%p, 0x%0zx bytes\n",
dataBlock->NvStorage, (size_t)dataBlock->NvStorageSize);
return AGESA_SUCCESS;
}
AGESA_STATUS OemS3LateRestore(S3_DATA_BLOCK *dataBlock)
{
void *base = NULL;
size_t size = 0;
stage_cache_get_raw(STAGE_S3_DATA, &base, &size);
if (!base || !size) {
printk(BIOS_ERR, "Error: S3 volatile data not found\n");
return AGESA_FATAL;
}
dataBlock->VolatileStorage = base;
dataBlock->VolatileStorageSize = size;
printk(BIOS_SPEW, "S3 volatile data @%p, 0x%0zx bytes\n",
dataBlock->VolatileStorage, (size_t)dataBlock->VolatileStorageSize);
return AGESA_SUCCESS;
}
AGESA_STATUS OemS3Save(S3_DATA_BLOCK *dataBlock)
{
if (mrc_cache_stash_data(MRC_TRAINING_DATA, DEFAULT_MRC_VERSION,
dataBlock->NvStorage, dataBlock->NvStorageSize) < 0) {
printk(BIOS_ERR, "Failed to stash MRC data\n");
return AGESA_CRITICAL;
}
stage_cache_add_raw(STAGE_S3_DATA, dataBlock->VolatileStorage,
dataBlock->VolatileStorageSize);
return AGESA_SUCCESS;
}
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