NonMmramMapDxeSmm.c File Reference

#include "PiSmmCpuCommon.h"
#include <Library/DxeServicesTableLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Library/UefiRuntimeServicesTableLib.h>

Go to the source code of this file.

Macros
#define	EFI_MEMORY_PRESENT   0x0100000000000000ULL
#define	EFI_MEMORY_INITIALIZED   0x0200000000000000ULL
#define	EFI_MEMORY_TESTED   0x0400000000000000ULL
#define	PREVIOUS_MEMORY_DESCRIPTOR(MemoryDescriptor, Size)    ((EFI_MEMORY_DESCRIPTOR *)((UINT8 *)(MemoryDescriptor) - (Size)))

Functions
STATIC VOID	SortMemoryMap (IN OUT EFI_MEMORY_DESCRIPTOR *MemoryMap, IN UINTN MemoryMapSize, IN UINTN DescriptorSize)
BOOLEAN	IsUefiPageNotPresent (IN EFI_MEMORY_DESCRIPTOR *MemoryMap)
STATIC VOID	MergeMemoryMapForNotPresentEntry (IN OUT EFI_MEMORY_DESCRIPTOR *MemoryMap, IN OUT UINTN *MemoryMapSize, IN UINTN DescriptorSize)
VOID	GetGcdMemoryMap (VOID)
VOID	GetUefiMemoryAttributesTable (VOID)
VOID	GetUefiMemoryMap (VOID)
VOID	UpdateUefiMemMapAttributes (VOID)
EFI_PHYSICAL_ADDRESS	GetSmmProfileData (IN OUT UINT64 *Size)
BOOLEAN	IsNonMmramLoggingAddress (IN UINT64 Address)
BOOLEAN	IsSmmCommBufferForbiddenAddress (IN UINT64 Address)
VOID	CreateExtendedProtectionRange (OUT MM_CPU_MEMORY_REGION **MemoryRegion, OUT UINTN *MemoryRegionCount)
VOID	CreateNonMmramMemMap (IN UINT8 PhysicalAddressBits, OUT MM_CPU_MEMORY_REGION **MemoryRegion, OUT UINTN *MemoryRegionCount)

Variables
EFI_MEMORY_DESCRIPTOR *	mUefiMemoryMap
UINTN	mUefiMemoryMapSize
UINTN	mUefiDescriptorSize
EFI_GCD_MEMORY_SPACE_DESCRIPTOR *	mGcdMemSpace = NULL
UINTN	mGcdMemNumberOfDesc = 0
EFI_MEMORY_ATTRIBUTES_TABLE *	mUefiMemoryAttributesTable = NULL

Detailed Description

Copyright (c) 2016 - 2024, Intel Corporation. All rights reserved.
SPDX-License-Identifier: BSD-2-Clause-Patent

Definition in file NonMmramMapDxeSmm.c.

Macro Definition Documentation

EFI_MEMORY_INITIALIZED

#define EFI_MEMORY_INITIALIZED   0x0200000000000000ULL

Definition at line 17 of file NonMmramMapDxeSmm.c.

EFI_MEMORY_PRESENT

#define EFI_MEMORY_PRESENT   0x0100000000000000ULL

Definition at line 16 of file NonMmramMapDxeSmm.c.

EFI_MEMORY_TESTED

#define EFI_MEMORY_TESTED   0x0400000000000000ULL

Definition at line 18 of file NonMmramMapDxeSmm.c.

PREVIOUS_MEMORY_DESCRIPTOR

#define PREVIOUS_MEMORY_DESCRIPTOR	(		MemoryDescriptor,
			Size
	)		((EFI_MEMORY_DESCRIPTOR *)((UINT8 *)(MemoryDescriptor) - (Size)))

Definition at line 20 of file NonMmramMapDxeSmm.c.

Function Documentation

CreateExtendedProtectionRange()

VOID CreateExtendedProtectionRange	(	OUT MM_CPU_MEMORY_REGION **	MemoryRegion,
		OUT UINTN *	MemoryRegionCount
	)

Create extended protection MemoryRegion. Return all MMIO ranges that are reported in GCD service at EndOfDxe.

The caller is responsible for freeing MemoryRegion via FreePool().

Parameters

[out]	MemoryRegion	Returned Non-Mmram Memory regions.
[out]	MemoryRegionCount	A pointer to the number of Memory regions.

Definition at line 609 of file NonMmramMapDxeSmm.c.

CreateNonMmramMemMap()

VOID CreateNonMmramMemMap	(	IN UINT8	PhysicalAddressBits,
		OUT MM_CPU_MEMORY_REGION **	MemoryRegion,
		OUT UINTN *	MemoryRegionCount
	)

Create the Non-Mmram Memory Region. Build MemoryRegion to cover [0, 2^PhysicalAddressBits) by excluding all Smram range. The memory attribute is all-allowed (read/write/executable).

The caller is responsible for freeing MemoryRegion via FreePool().

Parameters

[in]	PhysicalAddressBits	The bits of physical address to map.
[out]	MemoryRegion	Returned Non-Mmram Memory regions.
[out]	MemoryRegionCount	A pointer to the number of Memory regions.

Definition at line 689 of file NonMmramMapDxeSmm.c.

GetGcdMemoryMap()

VOID GetGcdMemoryMap

(

VOID

)

This function caches the GCD memory map information.

Definition at line 170 of file NonMmramMapDxeSmm.c.

GetSmmProfileData()

EFI_PHYSICAL_ADDRESS GetSmmProfileData

(

IN OUT UINT64 *

Size

)

Get SmmProfileData.

Parameters

[in,out]

Size

Return Size of SmmProfileData.

Returns

Address of SmmProfileData

Definition at line 489 of file NonMmramMapDxeSmm.c.

GetUefiMemoryAttributesTable()

VOID GetUefiMemoryAttributesTable

(

VOID

)

Get UEFI MemoryAttributesTable.

Definition at line 226 of file NonMmramMapDxeSmm.c.

GetUefiMemoryMap()

VOID GetUefiMemoryMap

(

VOID

)

This function caches the UEFI memory map information.

Definition at line 246 of file NonMmramMapDxeSmm.c.

IsNonMmramLoggingAddress()

BOOLEAN IsNonMmramLoggingAddress

(

IN UINT64

Address

)

Return if the Address is the NonMmram logging Address.

Parameters

[in]

Address

the address to be checked

Returns

TRUE The address is the NonMmram logging Address.

FALSE The address is not the NonMmram logging Address.

Definition at line 522 of file NonMmramMapDxeSmm.c.

IsSmmCommBufferForbiddenAddress()

BOOLEAN IsSmmCommBufferForbiddenAddress

(

IN UINT64

Address

)

Return if the Address is forbidden as SMM communication buffer.

Parameters

[in]

Address

the address to be checked

Returns

TRUE The address is forbidden as SMM communication buffer.

FALSE The address is allowed as SMM communication buffer.

Definition at line 540 of file NonMmramMapDxeSmm.c.

IsUefiPageNotPresent()

BOOLEAN IsUefiPageNotPresent

(

IN EFI_MEMORY_DESCRIPTOR *

MemoryMap

)

Return if a UEFI memory page should be marked as not present in SMM page table. If the memory map entries type is EfiLoaderCode/Data, EfiBootServicesCode/Data, EfiConventionalMemory, EfiUnusableMemory, EfiACPIReclaimMemory, return TRUE. Or return FALSE.

Parameters

[in]

MemoryMap

A pointer to the memory descriptor.

Returns

TRUE The memory described will be marked as not present in SMM page table.

FALSE The memory described will not be marked as not present in SMM page table.

Definition at line 85 of file NonMmramMapDxeSmm.c.

MergeMemoryMapForNotPresentEntry()

STATIC VOID MergeMemoryMapForNotPresentEntry	(	IN OUT EFI_MEMORY_DESCRIPTOR *	MemoryMap,
		IN OUT UINTN *	MemoryMapSize,
		IN UINTN	DescriptorSize
	)

Merge continuous memory map entries whose type is EfiLoaderCode/Data, EfiBootServicesCode/Data, EfiConventionalMemory, EfiUnusableMemory, EfiACPIReclaimMemory, because the memory described by these entries will be set as NOT present in SMM page table.

Parameters

[in,out]	MemoryMap	A pointer to the buffer in which firmware places the current memory map.
[in,out]	MemoryMapSize	A pointer to the size, in bytes, of the MemoryMap buffer. On input, this is the size of the current memory map. On output, it is the size of new memory map after merge.
[in]	DescriptorSize	Size, in bytes, of an individual EFI_MEMORY_DESCRIPTOR.

Definition at line 119 of file NonMmramMapDxeSmm.c.

SortMemoryMap()

STATIC VOID SortMemoryMap	(	IN OUT EFI_MEMORY_DESCRIPTOR *	MemoryMap,
		IN UINTN	MemoryMapSize,
		IN UINTN	DescriptorSize
	)

Sort memory map entries based upon PhysicalStart, from low to high.

Parameters

MemoryMap	A pointer to the buffer in which firmware places the current memory map.
MemoryMapSize	Size, in bytes, of the MemoryMap buffer.
DescriptorSize	Size, in bytes, of an individual EFI_MEMORY_DESCRIPTOR.

Definition at line 42 of file NonMmramMapDxeSmm.c.

UpdateUefiMemMapAttributes()

VOID UpdateUefiMemMapAttributes

(

VOID

)

This function updates UEFI memory attribute according to UEFI memory map.

Definition at line 318 of file NonMmramMapDxeSmm.c.

Variable Documentation

mGcdMemNumberOfDesc

UINTN mGcdMemNumberOfDesc = 0

Definition at line 28 of file NonMmramMapDxeSmm.c.

mGcdMemSpace

EFI_GCD_MEMORY_SPACE_DESCRIPTOR* mGcdMemSpace = NULL

Definition at line 27 of file NonMmramMapDxeSmm.c.

mUefiDescriptorSize

UINTN mUefiDescriptorSize

Definition at line 25 of file NonMmramMapDxeSmm.c.

mUefiMemoryAttributesTable

EFI_MEMORY_ATTRIBUTES_TABLE* mUefiMemoryAttributesTable = NULL

Definition at line 30 of file NonMmramMapDxeSmm.c.

mUefiMemoryMap

EFI_MEMORY_DESCRIPTOR* mUefiMemoryMap

Definition at line 23 of file NonMmramMapDxeSmm.c.

mUefiMemoryMapSize

UINTN mUefiMemoryMapSize

Definition at line 24 of file NonMmramMapDxeSmm.c.