IntelFsp2Pkg/Library/BaseFspPlatformLib/FspPlatformMemory.c

   1 /** @file
   2
   3   Copyright (c) 2014 - 2016, Intel Corporation. All rights reserved.<BR>
   4   This program and the accompanying materials
   5   are licensed and made available under the terms and conditions of the BSD License
   6   which accompanies this distribution.  The full text of the license may be found at
   7   http://opensource.org/licenses/bsd-license.php.
   8
   9   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  10   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  11
  12 **/
  13
  14 #include <PiPei.h>
  15 #include <Library/BaseLib.h>
  16 #include <Library/BaseMemoryLib.h>
  17 #include <Library/MemoryAllocationLib.h>
  18 #include <Library/DebugLib.h>
  19 #include <Library/PcdLib.h>
  20 #include <Library/HobLib.h>
  21 #include <Library/PeiServicesLib.h>
  22 #include <Library/FspCommonLib.h>
  23 #include <FspGlobalData.h>
  24 #include <FspEas.h>
  25
  26 /**
  27   Get system memory resource descriptor by owner.
  28
  29   @param[in] OwnerGuid   resource owner guid
  30 **/
  31 EFI_HOB_RESOURCE_DESCRIPTOR *
  32 EFIAPI
  33 FspGetResourceDescriptorByOwner (
  34   IN EFI_GUID   *OwnerGuid
  35   )
  36 {
  37   EFI_PEI_HOB_POINTERS    Hob;
  38
  39   //
  40   // Get the HOB list for processing
  41   //
  42   Hob.Raw = GetHobList ();
  43
  44   //
  45   // Collect memory ranges
  46   //
  47   while (!END_OF_HOB_LIST (Hob)) {
  48     if (Hob.Header->HobType == EFI_HOB_TYPE_RESOURCE_DESCRIPTOR) {
  49       if ((Hob.ResourceDescriptor->ResourceType == EFI_RESOURCE_MEMORY_RESERVED) && \
  50           (CompareGuid (&Hob.ResourceDescriptor->Owner, OwnerGuid))) {
  51         return  Hob.ResourceDescriptor;
  52       }
  53     }
  54     Hob.Raw = GET_NEXT_HOB (Hob);
  55   }
  56
  57   return NULL;
  58 }
  59
  60 /**
  61   Get system memory from HOB.
  62
  63   @param[in,out] LowMemoryLength   less than 4G memory length
  64   @param[in,out] HighMemoryLength  greater than 4G memory length
  65 **/
  66 VOID
  67 EFIAPI
  68 FspGetSystemMemorySize (
  69   IN OUT UINT64              *LowMemoryLength,
  70   IN OUT UINT64              *HighMemoryLength
  71   )
  72 {
  73   EFI_STATUS                  Status;
  74   EFI_BOOT_MODE               BootMode;
  75   EFI_RESOURCE_ATTRIBUTE_TYPE ResourceAttribute;
  76   EFI_PEI_HOB_POINTERS        Hob;
  77
  78   ResourceAttribute = (
  79                        EFI_RESOURCE_ATTRIBUTE_PRESENT |
  80                        EFI_RESOURCE_ATTRIBUTE_INITIALIZED |
  81                        EFI_RESOURCE_ATTRIBUTE_UNCACHEABLE |
  82                        EFI_RESOURCE_ATTRIBUTE_WRITE_COMBINEABLE |
  83                        EFI_RESOURCE_ATTRIBUTE_WRITE_THROUGH_CACHEABLE |
  84                        EFI_RESOURCE_ATTRIBUTE_WRITE_BACK_CACHEABLE
  85                        );
  86
  87   Status = PeiServicesGetBootMode (&BootMode);
  88   ASSERT_EFI_ERROR (Status);
  89
  90   if (BootMode != BOOT_ON_S3_RESUME) {
  91     ResourceAttribute |= EFI_RESOURCE_ATTRIBUTE_TESTED;
  92   }
  93
  94   *HighMemoryLength = 0;
  95   *LowMemoryLength  = SIZE_1MB;
  96   //
  97   // Get the HOB list for processing
  98   //
  99   Hob.Raw = GetHobList ();
 100
 101   //
 102   // Collect memory ranges
 103   //
 104   while (!END_OF_HOB_LIST (Hob)) {
 105     if (Hob.Header->HobType == EFI_HOB_TYPE_RESOURCE_DESCRIPTOR) {
 106       if ((Hob.ResourceDescriptor->ResourceType == EFI_RESOURCE_SYSTEM_MEMORY) ||
 107           ((Hob.ResourceDescriptor->ResourceType == EFI_RESOURCE_MEMORY_RESERVED) &&
 108            (Hob.ResourceDescriptor->ResourceAttribute == ResourceAttribute))) {
 109         //
 110         // Need memory above 1MB to be collected here
 111         //
 112         if (Hob.ResourceDescriptor->PhysicalStart >= BASE_1MB &&
 113             Hob.ResourceDescriptor->PhysicalStart < (EFI_PHYSICAL_ADDRESS) BASE_4GB) {
 114           *LowMemoryLength += (UINT64) (Hob.ResourceDescriptor->ResourceLength);
 115         } else if (Hob.ResourceDescriptor->PhysicalStart >= (EFI_PHYSICAL_ADDRESS) BASE_4GB) {
 116           *HighMemoryLength += (UINT64) (Hob.ResourceDescriptor->ResourceLength);
 117         }
 118       }
 119     }
 120     Hob.Raw = GET_NEXT_HOB (Hob);
 121   }
 122 }