| /* |
| * 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 <stage_cache.h> |
| #include <mrc_cache.h> |
| #include <reset.h> |
| #include <console/console.h> |
| #include <soc/southbridge.h> |
| #include <amdblocks/s3_resume.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; |
| } |