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/** @file
Copyright (c) 2024, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include "PiSmmCpuCommon.h"
/**
Get SmmProfileData.
@param[in, out] Size Return Size of SmmProfileData.
0 means the gMmProfileDataHobGuid does not exist.
@return Address of SmmProfileData
**/
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;
}
/**
Return if the Address is the NonMmram logging Address.
@param[in] Address the address to be checked
@return TRUE The address is the NonMmram logging Address.
@return FALSE The address is not the NonMmram logging Address.
**/
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;
}
/**
Return if the Address is forbidden as SMM communication buffer.
@param[in] Address the address to be checked
@return TRUE The address is forbidden as SMM communication buffer.
@return FALSE The address is allowed as SMM communication buffer.
**/
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;
}
/**
Build Memory Region from ResourceDescriptor HOBs by excluding Logging attribute range.
@param[out] MemoryRegion Returned Non-Mmram Memory regions.
@param[out] MemoryRegionCount A pointer to the number of Memory regions.
**/
VOID
BuildMemoryMapFromResDescHobs (
OUT MM_CPU_MEMORY_REGION **MemoryRegion,
OUT UINTN *MemoryRegionCount
)
{
EFI_PEI_HOB_POINTERS Hob;
UINTN Count;
UINTN Index;
EFI_PHYSICAL_ADDRESS MaxPhysicalAddress;
EFI_PHYSICAL_ADDRESS ResourceHobEnd;
ASSERT (MemoryRegion != NULL && MemoryRegionCount != NULL);
*MemoryRegion = NULL;
*MemoryRegionCount = 0;
MaxPhysicalAddress = LShiftU64 (1, mPhysicalAddressBits);
//
// 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) {
ResourceHobEnd = Hob.ResourceDescriptor->PhysicalStart + Hob.ResourceDescriptor->ResourceLength;
ASSERT (ResourceHobEnd <= MaxPhysicalAddress);
if (ResourceHobEnd > MaxPhysicalAddress) {
CpuDeadLoop ();
}
//
// 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;
}
/**
Build extended protection MemoryRegion.
The caller is responsible for freeing MemoryRegion via FreePool().
@param[out] MemoryRegion Returned Non-Mmram Memory regions.
@param[out] MemoryRegionCount A pointer to the number of Memory regions.
**/
VOID
CreateExtendedProtectionRange (
OUT MM_CPU_MEMORY_REGION **MemoryRegion,
OUT UINTN *MemoryRegionCount
)
{
BuildMemoryMapFromResDescHobs (MemoryRegion, MemoryRegionCount);
}
/**
Create the Non-Mmram Memory Region within the ResourceDescriptor HOBs
without Logging attribute.
The caller is responsible for freeing MemoryRegion via FreePool().
@param[in] PhysicalAddressBits The bits of physical address to map.
@param[out] MemoryRegion Returned Non-Mmram Memory regions.
@param[out] MemoryRegionCount A pointer to the number of Memory regions.
**/
VOID
CreateNonMmramMemMap (
IN UINT8 PhysicalAddressBits,
OUT MM_CPU_MEMORY_REGION **MemoryRegion,
OUT UINTN *MemoryRegionCount
)
{
BuildMemoryMapFromResDescHobs (MemoryRegion, MemoryRegionCount);
}
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