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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2012-2017 Advanced Micro Devices, Inc.
* Copyright (C) 2014 Google Inc.
*
* 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 <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 reboot_from_resume(const char *message) /* Does not return */
{
printk(BIOS_ERR, "%s", message);
set_pm1cnt_s5();
board_reset();
}
void get_s3nv_info(void **base, size_t *size)
{
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. */
int i;
uint32_t erased = 0xffffffff;
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");
printk(BIOS_SPEW, "S3 NV data @0x%p, 0x%0zx bytes\n", *base, *size);
}
void get_s3vol_info(void **base, size_t *size)
{
stage_cache_get_raw(STAGE_S3_DATA, base, size);
if (!*base || !*size)
printk(BIOS_ERR, "Error: S3 volatile data not found\n");
else
printk(BIOS_SPEW, "S3 volatile data @0x%p 0x%0zx total bytes\n",
*base, *size);
}
int save_s3_info(void *nv_base, size_t nv_size, void *vol_base, size_t vol_size)
{
if (mrc_cache_stash_data(MRC_TRAINING_DATA, DEFAULT_MRC_VERSION,
nv_base, nv_size) < 0) {
printk(BIOS_ERR, "Failed to stash MRC data\n");
return -1;
}
stage_cache_add_raw(STAGE_S3_DATA, vol_base, vol_size);
return 0;
}
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