src/drivers/amd/agesa/oem_s3.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include <string.h>
   4 #include <cbmem.h>
   5 #include <console/console.h>
   6 #include <mrc_cache.h>
   7 #include <northbridge/amd/agesa/state_machine.h>
   8 #include <AGESA.h>
   9 #include <northbridge/amd/agesa/agesa_helper.h>
  10
  11 /* Training data versioning is not supported or tracked. */
  12 #define DEFAULT_MRC_VERSION 0
  13
  14 AGESA_STATUS OemInitResume(AMD_S3_PARAMS *dataBlock)
  15 {
  16         void *nv_storage = NULL;
  17         size_t nv_storage_size = 0;
  18
  19         nv_storage = mrc_cache_current_mmap_leak(MRC_TRAINING_DATA, DEFAULT_MRC_VERSION,
  20                                                  &nv_storage_size);
  21
  22         if (nv_storage == NULL || nv_storage_size == 0) {
  23                 printk(BIOS_ERR, "%s: No valid MRC cache!\n", __func__);
  24                 return AGESA_CRITICAL;
  25         }
  26
  27         dataBlock->NvStorage = nv_storage;
  28         dataBlock->NvStorageSize = nv_storage_size;
  29
  30         return AGESA_SUCCESS;
  31 }
  32
  33 AGESA_STATUS OemS3LateRestore(AMD_S3_PARAMS *dataBlock)
  34 {
  35         char *heap = cbmem_find(CBMEM_ID_RESUME_SCRATCH);
  36         if (heap == NULL)
  37                 return AGESA_FATAL;
  38
  39         printk(BIOS_DEBUG, "Using resume HEAP at %08x\n",
  40                 (unsigned int)(uintptr_t)heap);
  41
  42         /* Return allocated CBMEM size, we do not keep track of
  43          * how much was actually used.
  44          */
  45         dataBlock->VolatileStorageSize = HIGH_MEMORY_SCRATCH;
  46         dataBlock->VolatileStorage = heap;
  47         return AGESA_SUCCESS;
  48 }
  49
  50 AGESA_STATUS OemS3Save(AMD_S3_PARAMS *dataBlock)
  51 {
  52         if (mrc_cache_stash_data(MRC_TRAINING_DATA, DEFAULT_MRC_VERSION,
  53                                  dataBlock->NvStorage, dataBlock->NvStorageSize) < 0) {
  54                 printk(BIOS_ERR, "%s: Failed to stash MRC data\n", __func__);
  55                 return AGESA_CRITICAL;
  56         }
  57
  58         /* To be consumed in AmdS3LateRestore. */
  59         char *heap = cbmem_add(CBMEM_ID_RESUME_SCRATCH, HIGH_MEMORY_SCRATCH);
  60         if (heap) {
  61                 memset(heap, 0, HIGH_MEMORY_SCRATCH);
  62                 memcpy(heap, dataBlock->VolatileStorage, dataBlock->VolatileStorageSize);
  63         }
  64
  65         /* Collect MTRR setup. */
  66         backup_mtrr();
  67
  68         return AGESA_SUCCESS;
  69 }