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       {
  46         return Hob.ResourceDescriptor;
  47       }
  48     }
  49
  50     Hob.Raw = GET_NEXT_HOB (Hob);
  51   }
  52
  53   return NULL;
  54 }
  55
  56 /**
  57   Get system memory from HOB.
  58
  59   @param[in,out] LowMemoryLength   less than 4G memory length
  60   @param[in,out] HighMemoryLength  greater than 4G memory length
  61 **/
  62 VOID
  63 EFIAPI
  64 FspGetSystemMemorySize (
  65   IN OUT UINT64  *LowMemoryLength,
  66   IN OUT UINT64  *HighMemoryLength
  67   )
  68 {
  69   EFI_STATUS                   Status;
  70   EFI_BOOT_MODE                BootMode;
  71   EFI_RESOURCE_ATTRIBUTE_TYPE  ResourceAttribute;
  72   EFI_PEI_HOB_POINTERS         Hob;
  73
  74   ResourceAttribute = (
  75                        EFI_RESOURCE_ATTRIBUTE_PRESENT |
  76                        EFI_RESOURCE_ATTRIBUTE_INITIALIZED |
  77                        EFI_RESOURCE_ATTRIBUTE_UNCACHEABLE |
  78                        EFI_RESOURCE_ATTRIBUTE_WRITE_COMBINEABLE |
  79                        EFI_RESOURCE_ATTRIBUTE_WRITE_THROUGH_CACHEABLE |
  80                        EFI_RESOURCE_ATTRIBUTE_WRITE_BACK_CACHEABLE
  81                        );
  82
  83   Status = PeiServicesGetBootMode (&BootMode);
  84   ASSERT_EFI_ERROR (Status);
  85
  86   if (BootMode != BOOT_ON_S3_RESUME) {
  87     ResourceAttribute |= EFI_RESOURCE_ATTRIBUTE_TESTED;
  88   }
  89
  90   *HighMemoryLength = 0;
  91   *LowMemoryLength  = SIZE_1MB;
  92   //
  93   // Get the HOB list for processing
  94   //
  95   Hob.Raw = GetHobList ();
  96
  97   //
  98   // Collect memory ranges
  99   //
 100   while (!END_OF_HOB_LIST (Hob)) {
 101     if (Hob.Header->HobType == EFI_HOB_TYPE_RESOURCE_DESCRIPTOR) {
 102       if ((Hob.ResourceDescriptor->ResourceType == EFI_RESOURCE_SYSTEM_MEMORY) ||
 103           ((Hob.ResourceDescriptor->ResourceType == EFI_RESOURCE_MEMORY_RESERVED) &&
 104            (Hob.ResourceDescriptor->ResourceAttribute == ResourceAttribute)))
 105       {
 106         //
 107         // Need memory above 1MB to be collected here
 108         //
 109         if ((Hob.ResourceDescriptor->PhysicalStart >= BASE_1MB) &&
 110             (Hob.ResourceDescriptor->PhysicalStart < (EFI_PHYSICAL_ADDRESS)BASE_4GB))
 111         {
 112           *LowMemoryLength += (UINT64)(Hob.ResourceDescriptor->ResourceLength);
 113         } else if (Hob.ResourceDescriptor->PhysicalStart >= (EFI_PHYSICAL_ADDRESS)BASE_4GB) {
 114           *HighMemoryLength += (UINT64)(Hob.ResourceDescriptor->ResourceLength);
 115         }
 116       }
 117     }
 118
 119     Hob.Raw = GET_NEXT_HOB (Hob);
 120   }
 121 }