NonMmramMapStandaloneMm.c

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#include "PiSmmCpuCommon.h"
 
EFI_PHYSICAL_ADDRESS
GetSmmProfileData (
  IN OUT  UINT64  *Size
  )
{
  EFI_PEI_HOB_POINTERS  SmmProfileDataHob;
 
  ASSERT (Size != NULL);
 
  //
  // Get Smm Profile Base from Memory Allocation HOB
  //
  SmmProfileDataHob.Raw = GetFirstHob (EFI_HOB_TYPE_MEMORY_ALLOCATION);
  while (SmmProfileDataHob.Raw != NULL) {
    //
    // Find gMmProfileDataHobGuid
    //
    if (CompareGuid (&SmmProfileDataHob.MemoryAllocation->AllocDescriptor.Name, &gMmProfileDataHobGuid)) {
      break;
    }
 
    SmmProfileDataHob.Raw = GetNextHob (EFI_HOB_TYPE_MEMORY_ALLOCATION, GET_NEXT_HOB (SmmProfileDataHob));
  }
 
  if (SmmProfileDataHob.Raw == NULL) {
    *Size = 0;
    return 0;
  }
 
  *Size = SmmProfileDataHob.MemoryAllocation->AllocDescriptor.MemoryLength;
 
  return SmmProfileDataHob.MemoryAllocation->AllocDescriptor.MemoryBaseAddress;
}
 
BOOLEAN
IsNonMmramLoggingAddress (
  IN UINT64  Address
  )
{
  EFI_PEI_HOB_POINTERS  Hob;
 
  Hob.Raw = GetFirstHob (EFI_HOB_TYPE_RESOURCE_DESCRIPTOR);
  while (Hob.Raw != NULL) {
    if ((Address >= Hob.ResourceDescriptor->PhysicalStart) && (Address < Hob.ResourceDescriptor->PhysicalStart + Hob.ResourceDescriptor->ResourceLength)) {
      if ((Hob.ResourceDescriptor->ResourceAttribute & MM_RESOURCE_ATTRIBUTE_LOGGING) != 0) {
        return TRUE;
      }
 
      return FALSE;
    }
 
    Hob.Raw = GET_NEXT_HOB (Hob);
    Hob.Raw = GetNextHob (EFI_HOB_TYPE_RESOURCE_DESCRIPTOR, Hob.Raw);
  }
 
  return FALSE;
}
 
BOOLEAN
IsSmmCommBufferForbiddenAddress (
  IN UINT64  Address
  )
{
  EFI_PEI_HOB_POINTERS  Hob;
 
  Hob.Raw = GetFirstHob (EFI_HOB_TYPE_RESOURCE_DESCRIPTOR);
  while (Hob.Raw != NULL) {
    if ((Address >= Hob.ResourceDescriptor->PhysicalStart) && (Address < Hob.ResourceDescriptor->PhysicalStart + Hob.ResourceDescriptor->ResourceLength)) {
      return FALSE;
    }
 
    Hob.Raw = GET_NEXT_HOB (Hob);
    Hob.Raw = GetNextHob (EFI_HOB_TYPE_RESOURCE_DESCRIPTOR, Hob.Raw);
  }
 
  return TRUE;
}
 
VOID
BuildMemoryMapFromResDescHobs (
  OUT MM_CPU_MEMORY_REGION  **MemoryRegion,
  OUT UINTN                 *MemoryRegionCount
  )
{
  EFI_PEI_HOB_POINTERS  Hob;
  UINTN                 Count;
  UINTN                 Index;
 
  ASSERT (MemoryRegion != NULL && MemoryRegionCount != NULL);
 
  *MemoryRegion      = NULL;
  *MemoryRegionCount = 0;
 
  //
  // Get the count.
  //
  Count   = 0;
  Hob.Raw = GetFirstHob (EFI_HOB_TYPE_RESOURCE_DESCRIPTOR);
  while (Hob.Raw != NULL) {
    if ((Hob.ResourceDescriptor->ResourceAttribute & MM_RESOURCE_ATTRIBUTE_LOGGING) == 0) {
      //
      // Resource HOBs describe all accessible non-smram regions.
      // Logging attribute range is treated as not present. Not-present ranges are not included in this memory map.
      //
      Count++;
    }
 
    Hob.Raw = GET_NEXT_HOB (Hob);
    Hob.Raw = GetNextHob (EFI_HOB_TYPE_RESOURCE_DESCRIPTOR, Hob.Raw);
  }
 
  *MemoryRegionCount = Count;
 
  *MemoryRegion = (MM_CPU_MEMORY_REGION *)AllocateZeroPool (sizeof (MM_CPU_MEMORY_REGION) * Count);
  ASSERT (*MemoryRegion != NULL);
 
  Index   = 0;
  Hob.Raw = GetFirstHob (EFI_HOB_TYPE_RESOURCE_DESCRIPTOR);
  while (Hob.Raw != NULL) {
    if ((Hob.ResourceDescriptor->ResourceAttribute & MM_RESOURCE_ATTRIBUTE_LOGGING) == 0) {
      ASSERT (Index < Count);
      (*MemoryRegion)[Index].Base      = Hob.ResourceDescriptor->PhysicalStart;
      (*MemoryRegion)[Index].Length    = Hob.ResourceDescriptor->ResourceLength;
      (*MemoryRegion)[Index].Attribute = EFI_MEMORY_XP;
      if (Hob.ResourceDescriptor->ResourceAttribute == EFI_RESOURCE_ATTRIBUTE_READ_ONLY_PROTECTED) {
        (*MemoryRegion)[Index].Attribute |= EFI_MEMORY_RO;
      }
 
      Index++;
    }
 
    Hob.Raw = GET_NEXT_HOB (Hob);
    Hob.Raw = GetNextHob (EFI_HOB_TYPE_RESOURCE_DESCRIPTOR, Hob.Raw);
  }
 
  return;
}
 
VOID
CreateExtendedProtectionRange (
  OUT MM_CPU_MEMORY_REGION  **MemoryRegion,
  OUT UINTN                 *MemoryRegionCount
  )
{
  BuildMemoryMapFromResDescHobs (MemoryRegion, MemoryRegionCount);
}
 
VOID
CreateNonMmramMemMap (
  IN  UINT8                 PhysicalAddressBits,
  OUT MM_CPU_MEMORY_REGION  **MemoryRegion,
  OUT UINTN                 *MemoryRegionCount
  )
{
  BuildMemoryMapFromResDescHobs (MemoryRegion, MemoryRegionCount);
}