IntelFsp2Pkg/Library/BaseFspPlatformLib/FspPlatformMemory.c

   1 /** @file
   2
   3   Copyright (c) 2014 - 2018, Intel Corporation. All rights reserved.<BR>
   4   SPDX-License-Identifier: BSD-2-Clause-Patent
   5
   6 **/
   7
   8 #include <PiPei.h>
   9 #include <Library/BaseLib.h>
  10 #include <Library/BaseMemoryLib.h>
  11 #include <Library/MemoryAllocationLib.h>
  12 #include <Library/DebugLib.h>
  13 #include <Library/PcdLib.h>
  14 #include <Library/HobLib.h>
  15 #include <Library/PeiServicesLib.h>
  16 #include <Library/FspCommonLib.h>
  17 #include <FspGlobalData.h>
  18 #include <FspEas.h>
  19
  20 /**
  21   Get system memory resource descriptor by owner.
  22
  23   @param[in] OwnerGuid   resource owner guid
  24 **/
  25 EFI_HOB_RESOURCE_DESCRIPTOR *
  26 EFIAPI
  27 FspGetResourceDescriptorByOwner (
  28   IN EFI_GUID   *OwnerGuid
  29   )
  30 {
  31   EFI_PEI_HOB_POINTERS    Hob;
  32
  33   //
  34   // Get the HOB list for processing
  35   //
  36   Hob.Raw = GetHobList ();
  37
  38   //
  39   // Collect memory ranges
  40   //
  41   while (!END_OF_HOB_LIST (Hob)) {
  42     if (Hob.Header->HobType == EFI_HOB_TYPE_RESOURCE_DESCRIPTOR) {
  43       if ((Hob.ResourceDescriptor->ResourceType == EFI_RESOURCE_MEMORY_RESERVED) && \
  44           (CompareGuid (&Hob.ResourceDescriptor->Owner, OwnerGuid))) {
  45         return  Hob.ResourceDescriptor;
  46       }
  47     }
  48     Hob.Raw = GET_NEXT_HOB (Hob);
  49   }
  50
  51   return NULL;
  52 }
  53
  54 /**
  55   Get system memory from HOB.
  56
  57   @param[in,out] LowMemoryLength   less than 4G memory length
  58   @param[in,out] HighMemoryLength  greater than 4G memory length
  59 **/
  60 VOID
  61 EFIAPI
  62 FspGetSystemMemorySize (
  63   IN OUT UINT64              *LowMemoryLength,
  64   IN OUT UINT64              *HighMemoryLength
  65   )
  66 {
  67   EFI_STATUS                  Status;
  68   EFI_BOOT_MODE               BootMode;
  69   EFI_RESOURCE_ATTRIBUTE_TYPE ResourceAttribute;
  70   EFI_PEI_HOB_POINTERS        Hob;
  71
  72   ResourceAttribute = (
  73                        EFI_RESOURCE_ATTRIBUTE_PRESENT |
  74                        EFI_RESOURCE_ATTRIBUTE_INITIALIZED |
  75                        EFI_RESOURCE_ATTRIBUTE_UNCACHEABLE |
  76                        EFI_RESOURCE_ATTRIBUTE_WRITE_COMBINEABLE |
  77                        EFI_RESOURCE_ATTRIBUTE_WRITE_THROUGH_CACHEABLE |
  78                        EFI_RESOURCE_ATTRIBUTE_WRITE_BACK_CACHEABLE
  79                        );
  80
  81   Status = PeiServicesGetBootMode (&BootMode);
  82   ASSERT_EFI_ERROR (Status);
  83
  84   if (BootMode != BOOT_ON_S3_RESUME) {
  85     ResourceAttribute |= EFI_RESOURCE_ATTRIBUTE_TESTED;
  86   }
  87
  88   *HighMemoryLength = 0;
  89   *LowMemoryLength  = SIZE_1MB;
  90   //
  91   // Get the HOB list for processing
  92   //
  93   Hob.Raw = GetHobList ();
  94
  95   //
  96   // Collect memory ranges
  97   //
  98   while (!END_OF_HOB_LIST (Hob)) {
  99     if (Hob.Header->HobType == EFI_HOB_TYPE_RESOURCE_DESCRIPTOR) {
 100       if ((Hob.ResourceDescriptor->ResourceType == EFI_RESOURCE_SYSTEM_MEMORY) ||
 101           ((Hob.ResourceDescriptor->ResourceType == EFI_RESOURCE_MEMORY_RESERVED) &&
 102            (Hob.ResourceDescriptor->ResourceAttribute == ResourceAttribute))) {
 103         //
 104         // Need memory above 1MB to be collected here
 105         //
 106         if (Hob.ResourceDescriptor->PhysicalStart >= BASE_1MB &&
 107             Hob.ResourceDescriptor->PhysicalStart < (EFI_PHYSICAL_ADDRESS) BASE_4GB) {
 108           *LowMemoryLength += (UINT64) (Hob.ResourceDescriptor->ResourceLength);
 109         } else if (Hob.ResourceDescriptor->PhysicalStart >= (EFI_PHYSICAL_ADDRESS) BASE_4GB) {
 110           *HighMemoryLength += (UINT64) (Hob.ResourceDescriptor->ResourceLength);
 111         }
 112       }
 113     }
 114     Hob.Raw = GET_NEXT_HOB (Hob);
 115   }
 116 }