#include <Base.h>
#include <Uefi.h>
#include <Library/PeCoffGetEntryPointLib.h>
#include <Library/SerialPortLib.h>
#include <Library/SynchronizationLib.h>
#include <Library/PrintLib.h>
#include <Protocol/SmmBase2.h>
#include <Register/Intel/Cpuid.h>
#include <Register/Intel/Msr.h>
#include "CpuDxe.h"
#include "CpuPageTable.h"

Data Structures
struct	PAGE_ATTRIBUTE_TABLE

Macros
#define	IA32_PG_P BIT0

#define	IA32_PG_RW BIT1

#define	IA32_PG_U BIT2

#define	IA32_PG_WT BIT3

#define	IA32_PG_CD BIT4

#define	IA32_PG_A BIT5

#define	IA32_PG_D BIT6

#define	IA32_PG_PS BIT7

#define	IA32_PG_PAT_2M BIT12

#define	IA32_PG_PAT_4K IA32_PG_PS

#define	IA32_PG_PMNT BIT62

#define	IA32_PG_NX BIT63

#define	PAGE_ATTRIBUTE_BITS (IA32_PG_D \| IA32_PG_A \| IA32_PG_U \| IA32_PG_RW \| IA32_PG_P)

#define	PAGE_ATTRIBUTE_BITS_POST_SPLIT (IA32_PG_RW \| IA32_PG_P)

#define	IA32_PAE_PDPTE_ATTRIBUTE_BITS (IA32_PG_P)

#define	PAGE_PROGATE_BITS (IA32_PG_NX \| PAGE_ATTRIBUTE_BITS)

#define	PAGING_4K_MASK 0xFFF

#define	PAGING_2M_MASK 0x1FFFFF

#define	PAGING_1G_MASK 0x3FFFFFFF

#define	PAGING_PAE_INDEX_MASK 0x1FF

#define	PAGING_4K_ADDRESS_MASK_64 0x000FFFFFFFFFF000ull

#define	PAGING_2M_ADDRESS_MASK_64 0x000FFFFFFFE00000ull

#define	PAGING_1G_ADDRESS_MASK_64 0x000FFFFFC0000000ull

#define	MAX_PF_ENTRY_COUNT 10

#define	MAX_DEBUG_MESSAGE_LENGTH 0x100

#define	IA32_PF_EC_ID BIT4

Enumerations
enum	PAGE_ATTRIBUTE { PageNone , Page4K , Page2M , Page1G , PageNone , Page4K , Page2M , Page1G }

enum	PAGE_ACTION { PageActionAssign , PageActionSet , PageActionClear }

Functions
BOOLEAN	IsInSmm (VOID)

VOID	GetCurrentPagingContext (IN OUT PAGE_TABLE_LIB_PAGING_CONTEXT *PagingContext)

UINTN	PageAttributeToLength (IN PAGE_ATTRIBUTE PageAttribute)

UINTN	PageAttributeToMask (IN PAGE_ATTRIBUTE PageAttribute)

VOID *	GetPageTableEntry (IN PAGE_TABLE_LIB_PAGING_CONTEXT PagingContext, IN PHYSICAL_ADDRESS Address, OUT PAGE_ATTRIBUTE PageAttribute)

UINT64	GetAttributesFromPageEntry (IN UINT64 *PageEntry)

VOID	ConvertPageEntryAttribute (IN PAGE_TABLE_LIB_PAGING_CONTEXT PagingContext, IN UINT64 PageEntry, IN UINT64 Attributes, IN PAGE_ACTION PageAction, OUT BOOLEAN *IsModified)

PAGE_ATTRIBUTE	NeedSplitPage (IN PHYSICAL_ADDRESS BaseAddress, IN UINT64 Length, IN UINT64 *PageEntry, IN PAGE_ATTRIBUTE PageAttribute)

RETURN_STATUS	SplitPage (IN UINT64 *PageEntry, IN PAGE_ATTRIBUTE PageAttribute, IN PAGE_ATTRIBUTE SplitAttribute, IN PAGE_TABLE_LIB_ALLOCATE_PAGES AllocatePagesFunc)

BOOLEAN	IsReadOnlyPageWriteProtected (VOID)

VOID	DisableReadOnlyPageWriteProtect (VOID)

VOID	EnableReadOnlyPageWriteProtect (VOID)

RETURN_STATUS	ConvertMemoryPageAttributes (IN PAGE_TABLE_LIB_PAGING_CONTEXT PagingContext OPTIONAL, IN PHYSICAL_ADDRESS BaseAddress, IN UINT64 Length, IN UINT64 Attributes, IN PAGE_ACTION PageAction, IN PAGE_TABLE_LIB_ALLOCATE_PAGES AllocatePagesFunc OPTIONAL, OUT BOOLEAN IsSplitted OPTIONAL, OUT BOOLEAN *IsModified OPTIONAL)

RETURN_STATUS EFIAPI	AssignMemoryPageAttributes (IN PAGE_TABLE_LIB_PAGING_CONTEXT *PagingContext OPTIONAL, IN PHYSICAL_ADDRESS BaseAddress, IN UINT64 Length, IN UINT64 Attributes, IN PAGE_TABLE_LIB_ALLOCATE_PAGES AllocatePagesFunc OPTIONAL)

BOOLEAN	IsExecuteDisableEnabled (VOID)

VOID	RefreshGcdMemoryAttributesFromPaging (VOID)

BOOLEAN	InitializePageTablePool (IN UINTN PoolPages)

VOID *EFIAPI	AllocatePageTableMemory (IN UINTN Pages)

VOID EFIAPI	DebugExceptionHandler (IN EFI_EXCEPTION_TYPE ExceptionType, IN EFI_SYSTEM_CONTEXT SystemContext)

VOID EFIAPI	PageFaultExceptionHandler (IN EFI_EXCEPTION_TYPE ExceptionType, IN EFI_SYSTEM_CONTEXT SystemContext)

VOID	InitializePageTableLib (VOID)

Variables
PAGE_ATTRIBUTE_TABLE	mPageAttributeTable []

PAGE_TABLE_POOL *	mPageTablePool = NULL

BOOLEAN	mPageTablePoolLock = FALSE

PAGE_TABLE_LIB_PAGING_CONTEXT	mPagingContext

EFI_SMM_BASE2_PROTOCOL *	mSmmBase2 = NULL

UINTN *	mPFEntryCount

UINT64 (	mLastPFEntryPointer )[MAX_PF_ENTRY_COUNT]

Detailed Description

Page table management support.

SPDX-License-Identifier: BSD-2-Clause-Patent

Definition in file CpuPageTable.c.

Macro Definition Documentation

◆ IA32_PAE_PDPTE_ATTRIBUTE_BITS

#define IA32_PAE_PDPTE_ATTRIBUTE_BITS (IA32_PG_P)

Definition at line 47 of file CpuPageTable.c.

◆ IA32_PF_EC_ID

#define IA32_PF_EC_ID BIT4

Definition at line 63 of file CpuPageTable.c.

◆ IA32_PG_A

#define IA32_PG_A BIT5

Definition at line 32 of file CpuPageTable.c.

◆ IA32_PG_CD

#define IA32_PG_CD BIT4

Definition at line 31 of file CpuPageTable.c.

◆ IA32_PG_D

#define IA32_PG_D BIT6

Definition at line 33 of file CpuPageTable.c.

◆ IA32_PG_NX

#define IA32_PG_NX BIT63

Definition at line 38 of file CpuPageTable.c.

◆ IA32_PG_P

#define IA32_PG_P BIT0

Page Table Entry

Definition at line 27 of file CpuPageTable.c.

◆ IA32_PG_PAT_2M

#define IA32_PG_PAT_2M BIT12

Definition at line 35 of file CpuPageTable.c.

◆ IA32_PG_PAT_4K

#define IA32_PG_PAT_4K IA32_PG_PS

Definition at line 36 of file CpuPageTable.c.

◆ IA32_PG_PMNT

#define IA32_PG_PMNT BIT62

Definition at line 37 of file CpuPageTable.c.

◆ IA32_PG_PS

#define IA32_PG_PS BIT7

Definition at line 34 of file CpuPageTable.c.

◆ IA32_PG_RW

#define IA32_PG_RW BIT1

Definition at line 28 of file CpuPageTable.c.

◆ IA32_PG_U

#define IA32_PG_U BIT2

Definition at line 29 of file CpuPageTable.c.

◆ IA32_PG_WT

#define IA32_PG_WT BIT3

Definition at line 30 of file CpuPageTable.c.

◆ MAX_DEBUG_MESSAGE_LENGTH

#define MAX_DEBUG_MESSAGE_LENGTH 0x100

Definition at line 62 of file CpuPageTable.c.

◆ MAX_PF_ENTRY_COUNT

#define MAX_PF_ENTRY_COUNT 10

Definition at line 61 of file CpuPageTable.c.

◆ PAGE_ATTRIBUTE_BITS

#define PAGE_ATTRIBUTE_BITS (IA32_PG_D | IA32_PG_A | IA32_PG_U | IA32_PG_RW | IA32_PG_P)

Definition at line 40 of file CpuPageTable.c.

◆ PAGE_ATTRIBUTE_BITS_POST_SPLIT

#define PAGE_ATTRIBUTE_BITS_POST_SPLIT (IA32_PG_RW | IA32_PG_P)

Definition at line 41 of file CpuPageTable.c.

◆ PAGE_PROGATE_BITS

#define PAGE_PROGATE_BITS (IA32_PG_NX | PAGE_ATTRIBUTE_BITS)

Definition at line 49 of file CpuPageTable.c.

◆ PAGING_1G_ADDRESS_MASK_64

#define PAGING_1G_ADDRESS_MASK_64 0x000FFFFFC0000000ull

Definition at line 59 of file CpuPageTable.c.

◆ PAGING_1G_MASK

#define PAGING_1G_MASK 0x3FFFFFFF

Definition at line 53 of file CpuPageTable.c.

◆ PAGING_2M_ADDRESS_MASK_64

#define PAGING_2M_ADDRESS_MASK_64 0x000FFFFFFFE00000ull

Definition at line 58 of file CpuPageTable.c.

◆ PAGING_2M_MASK

#define PAGING_2M_MASK 0x1FFFFF

Definition at line 52 of file CpuPageTable.c.

◆ PAGING_4K_ADDRESS_MASK_64

#define PAGING_4K_ADDRESS_MASK_64 0x000FFFFFFFFFF000ull

Definition at line 57 of file CpuPageTable.c.

◆ PAGING_4K_MASK

#define PAGING_4K_MASK 0xFFF

Definition at line 51 of file CpuPageTable.c.

◆ PAGING_PAE_INDEX_MASK

#define PAGING_PAE_INDEX_MASK 0x1FF

Definition at line 55 of file CpuPageTable.c.

Enumeration Type Documentation

◆ PAGE_ACTION

enum PAGE_ACTION

Definition at line 78 of file CpuPageTable.c.

◆ PAGE_ATTRIBUTE

enum PAGE_ATTRIBUTE

Definition at line 65 of file CpuPageTable.c.

Function Documentation

◆ AllocatePageTableMemory()

VOID *EFIAPI AllocatePageTableMemory ( IN UINTN Pages )

This API provides a way to allocate memory for page table.

This API can be called more than once to allocate memory for page tables.

Allocates the number of 4KB pages and returns a pointer to the allocated buffer. The buffer returned is aligned on a 4KB boundary.

If Pages is 0, then NULL is returned. If there is not enough memory remaining to satisfy the request, then NULL is returned.

Parameters

Pages The number of 4 KB pages to allocate.

Returns: A pointer to the allocated buffer or NULL if allocation fails.

Definition at line 1210 of file CpuPageTable.c.

◆ AssignMemoryPageAttributes()

RETURN_STATUS EFIAPI AssignMemoryPageAttributes	(	IN PAGE_TABLE_LIB_PAGING_CONTEXT *PagingContext	OPTIONAL,
		IN PHYSICAL_ADDRESS	BaseAddress,
		IN UINT64	Length,
		IN UINT64	Attributes,
		IN PAGE_TABLE_LIB_ALLOCATE_PAGES AllocatePagesFunc	OPTIONAL
	)

This function assigns the page attributes for the memory region specified by BaseAddress and Length from their current attributes to the attributes specified by Attributes.

Caller should make sure BaseAddress and Length is at page boundary.

Caller need guarantee the TPL <= TPL_NOTIFY, if there is split page request.

Parameters

[in]	PagingContext	The paging context. NULL means get page table from current CPU context.
[in]	BaseAddress	The physical address that is the start address of a memory region.
[in]	Length	The size in bytes of the memory region.
[in]	Attributes	The bit mask of attributes to set for the memory region.
[in]	AllocatePagesFunc	If page split is needed, this function is used to allocate more pages. NULL mean page split is unsupported.

Return values

RETURN_SUCCESS	The attributes were cleared for the memory region.
RETURN_ACCESS_DENIED	The attributes for the memory resource range specified by BaseAddress and Length cannot be modified.
RETURN_INVALID_PARAMETER	Length is zero. Attributes specified an illegal combination of attributes that cannot be set together.
RETURN_OUT_OF_RESOURCES	There are not enough system resources to modify the attributes of the memory resource range.
RETURN_UNSUPPORTED	The processor does not support one or more bytes of the memory resource range specified by BaseAddress and Length. The bit mask of attributes is not support for the memory resource range specified by BaseAddress and Length.

Definition at line 912 of file CpuPageTable.c.

◆ ConvertMemoryPageAttributes()

RETURN_STATUS ConvertMemoryPageAttributes	(	IN PAGE_TABLE_LIB_PAGING_CONTEXT *PagingContext	OPTIONAL,
		IN PHYSICAL_ADDRESS	BaseAddress,
		IN UINT64	Length,
		IN UINT64	Attributes,
		IN PAGE_ACTION	PageAction,
		IN PAGE_TABLE_LIB_ALLOCATE_PAGES AllocatePagesFunc	OPTIONAL,
		OUT BOOLEAN *IsSplitted	OPTIONAL,
		OUT BOOLEAN *IsModified	OPTIONAL
	)

This function modifies the page attributes for the memory region specified by BaseAddress and Length from their current attributes to the attributes specified by Attributes.

Caller should make sure BaseAddress and Length is at page boundary.

Parameters

[in]	PagingContext	The paging context. NULL means get page table from current CPU context.
[in]	BaseAddress	The physical address that is the start address of a memory region.
[in]	Length	The size in bytes of the memory region.
[in]	Attributes	The bit mask of attributes to modify for the memory region.
[in]	PageAction	The page action.
[in]	AllocatePagesFunc	If page split is needed, this function is used to allocate more pages. NULL mean page split is unsupported.
[out]	IsSplitted	TRUE means page table splitted. FALSE means page table not splitted.
[out]	IsModified	TRUE means page table modified. FALSE means page table not modified.

Return values

RETURN_SUCCESS	The attributes were modified for the memory region.
RETURN_ACCESS_DENIED	The attributes for the memory resource range specified by BaseAddress and Length cannot be modified.
RETURN_INVALID_PARAMETER	Length is zero. Attributes specified an illegal combination of attributes that cannot be set together.
RETURN_OUT_OF_RESOURCES	There are not enough system resources to modify the attributes of the memory resource range.
RETURN_UNSUPPORTED	The processor does not support one or more bytes of the memory resource range specified by BaseAddress and Length. The bit mask of attributes is not support for the memory resource range specified by BaseAddress and Length.

Definition at line 719 of file CpuPageTable.c.

◆ ConvertPageEntryAttribute()

VOID ConvertPageEntryAttribute	(	IN PAGE_TABLE_LIB_PAGING_CONTEXT *	PagingContext,
		IN UINT64 *	PageEntry,
		IN UINT64	Attributes,
		IN PAGE_ACTION	PageAction,
		OUT BOOLEAN *	IsModified
	)

Modify memory attributes of page entry.

Parameters

[in]	PagingContext	The paging context.
[in]	PageEntry	The page entry.
[in]	Attributes	The bit mask of attributes to modify for the memory region.
[in]	PageAction	The page action.
[out]	IsModified	TRUE means page table modified. FALSE means page table not modified.

Definition at line 414 of file CpuPageTable.c.

◆ DebugExceptionHandler()

VOID EFIAPI DebugExceptionHandler	(	IN EFI_EXCEPTION_TYPE	ExceptionType,
		IN EFI_SYSTEM_CONTEXT	SystemContext
	)

Special handler for #DB exception, which will restore the page attributes (not-present). It should work with #PF handler which will set pages to 'present'.

Parameters

ExceptionType	Exception type.
SystemContext	Pointer to EFI_SYSTEM_CONTEXT.

Definition at line 1250 of file CpuPageTable.c.

◆ DisableReadOnlyPageWriteProtect()

VOID DisableReadOnlyPageWriteProtect ( VOID )

Disable Write Protect on pages marked as read-only.

Definition at line 651 of file CpuPageTable.c.

◆ EnableReadOnlyPageWriteProtect()

VOID EnableReadOnlyPageWriteProtect ( VOID )

Enable Write Protect on pages marked as read-only.

Definition at line 672 of file CpuPageTable.c.

◆ GetAttributesFromPageEntry()

UINT64 GetAttributesFromPageEntry ( IN UINT64 * PageEntry )

Return memory attributes of page entry.

Parameters

[in] PageEntry The page entry.

Returns: Memory attributes of page entry.

Definition at line 382 of file CpuPageTable.c.

◆ GetCurrentPagingContext()

VOID GetCurrentPagingContext ( IN OUT PAGE_TABLE_LIB_PAGING_CONTEXT * PagingContext )

Return current paging context.

Parameters

[in,out] PagingContext The paging context.

Definition at line 151 of file CpuPageTable.c.

◆ GetPageTableEntry()

VOID * GetPageTableEntry	(	IN PAGE_TABLE_LIB_PAGING_CONTEXT *	PagingContext,
		IN PHYSICAL_ADDRESS	Address,
		OUT PAGE_ATTRIBUTE *	PageAttribute
	)

Return page table entry to match the address.

Parameters

[in]	PagingContext	The paging context.
[in]	Address	The address to be checked.
[out]	PageAttributes	The page attribute of the page entry.

Returns: The page entry.

Definition at line 283 of file CpuPageTable.c.

◆ InitializePageTableLib()

VOID InitializePageTableLib ( VOID )

Initialize the Page Table lib.

Definition at line 1401 of file CpuPageTable.c.

◆ InitializePageTablePool()

BOOLEAN InitializePageTablePool ( IN UINTN PoolPages )

Initialize a buffer pool for page table use only.

To reduce the potential split operation on page table, the pages reserved for page table should be allocated in the times of PAGE_TABLE_POOL_UNIT_PAGES and at the boundary of PAGE_TABLE_POOL_ALIGNMENT. So the page pool is always initialized with number of pages greater than or equal to the given PoolPages.

Once the pages in the pool are used up, this method should be called again to reserve at least another PAGE_TABLE_POOL_UNIT_PAGES. Usually this won't happen often in practice.

Parameters

[in] PoolPages The least page number of the pool to be created.

Return values

TRUE	The pool is initialized successfully.
FALSE	The memory is out of resource.

Definition at line 1117 of file CpuPageTable.c.

◆ IsExecuteDisableEnabled()

BOOLEAN IsExecuteDisableEnabled ( VOID )

Check if Execute Disable feature is enabled or not.

Definition at line 946 of file CpuPageTable.c.

◆ IsInSmm()

BOOLEAN IsInSmm ( VOID )

Check if current execution environment is in SMM mode or not, via EFI_SMM_BASE2_PROTOCOL.

This is necessary because of the fact that MdePkg\Library\SmmMemoryAllocationLib supports to free memory outside SMRAM. The library will call gBS->FreePool() or gBS->FreePages() and then SetMemorySpaceAttributes interface in turn to change memory paging attributes during free operation, if some memory related features are enabled (like Heap Guard).

This means that SetMemorySpaceAttributes() has chance to run in SMM mode. This will cause incorrect result because SMM mode always loads its own page tables, which are usually different from DXE. This function can be used to detect such situation and help to avoid further misoperations.

Return values

TRUE	In SMM mode.
FALSE	Not in SMM mode.

Definition at line 120 of file CpuPageTable.c.

◆ IsReadOnlyPageWriteProtected()

BOOLEAN IsReadOnlyPageWriteProtected ( VOID )

Check the WP status in CR0 register. This bit is used to lock or unlock write access to pages marked as read-only.

Return values

TRUE	Write protection is enabled.
FALSE	Write protection is disabled.

Definition at line 629 of file CpuPageTable.c.

◆ NeedSplitPage()

PAGE_ATTRIBUTE NeedSplitPage	(	IN PHYSICAL_ADDRESS	BaseAddress,
		IN UINT64	Length,
		IN UINT64 *	PageEntry,
		IN PAGE_ATTRIBUTE	PageAttribute
	)

This function returns if there is need to split page entry.

Parameters

[in]	BaseAddress	The base address to be checked.
[in]	Length	The length to be checked.
[in]	PageEntry	The page entry to be checked.
[in]	PageAttribute	The page attribute of the page entry.

Return values

SplitAttributes on if there is need to split page entry.

Definition at line 516 of file CpuPageTable.c.

◆ PageAttributeToLength()

UINTN PageAttributeToLength ( IN PAGE_ATTRIBUTE PageAttribute )

Return length according to page attributes.

Parameters

[in] PageAttributes The page attribute of the page entry.

Returns: The length of page entry.

Definition at line 235 of file CpuPageTable.c.

◆ PageAttributeToMask()

UINTN PageAttributeToMask ( IN PAGE_ATTRIBUTE PageAttribute )

Return address mask according to page attributes.

Parameters

[in] PageAttributes The page attribute of the page entry.

Returns: The address mask of page entry.

Definition at line 258 of file CpuPageTable.c.

◆ PageFaultExceptionHandler()

VOID EFIAPI PageFaultExceptionHandler	(	IN EFI_EXCEPTION_TYPE	ExceptionType,
		IN EFI_SYSTEM_CONTEXT	SystemContext
	)

Special handler for #PF exception, which will set the pages which caused #PF to be 'present'. The attribute of those pages should be restored in the subsequent #DB handler.

Parameters

ExceptionType	Exception type.
SystemContext	Pointer to EFI_SYSTEM_CONTEXT.

Definition at line 1310 of file CpuPageTable.c.

◆ RefreshGcdMemoryAttributesFromPaging()

VOID RefreshGcdMemoryAttributesFromPaging ( VOID )

Update GCD memory space attributes according to current page table setup.

Definition at line 960 of file CpuPageTable.c.

◆ SplitPage()

RETURN_STATUS SplitPage	(	IN UINT64 *	PageEntry,
		IN PAGE_ATTRIBUTE	PageAttribute,
		IN PAGE_ATTRIBUTE	SplitAttribute,
		IN PAGE_TABLE_LIB_ALLOCATE_PAGES	AllocatePagesFunc
	)

This function splits one page entry to small page entries.

Parameters

[in]	PageEntry	The page entry to be splitted.
[in]	PageAttribute	The page attribute of the page entry.
[in]	SplitAttribute	How to split the page entry.
[in]	AllocatePagesFunc	If page split is needed, this function is used to allocate more pages.

Return values

RETURN_SUCCESS	The page entry is splitted.
RETURN_UNSUPPORTED	The page entry does not support to be splitted.
RETURN_OUT_OF_RESOURCES	No resource to split page entry.

Definition at line 551 of file CpuPageTable.c.

Variable Documentation

◆ mLastPFEntryPointer

UINT64*(* mLastPFEntryPointer)[MAX_PF_ENTRY_COUNT]

Definition at line 99 of file CpuPageTable.c.

◆ mPageAttributeTable

PAGE_ATTRIBUTE_TABLE mPageAttributeTable[]

Initial value:

= {
  { Page4K, SIZE_4KB, PAGING_4K_ADDRESS_MASK_64 },
  { Page2M, SIZE_2MB, PAGING_2M_ADDRESS_MASK_64 },
  { Page1G, SIZE_1GB, PAGING_1G_ADDRESS_MASK_64 },
}

Definition at line 84 of file CpuPageTable.c.

◆ mPageTablePool

PAGE_TABLE_POOL* mPageTablePool = NULL

Definition at line 90 of file CpuPageTable.c.

◆ mPageTablePoolLock

BOOLEAN mPageTablePoolLock = FALSE

Definition at line 91 of file CpuPageTable.c.

◆ mPagingContext

PAGE_TABLE_LIB_PAGING_CONTEXT mPagingContext

Definition at line 92 of file CpuPageTable.c.

◆ mPFEntryCount

UINTN* mPFEntryCount

Definition at line 98 of file CpuPageTable.c.

◆ mSmmBase2

EFI_SMM_BASE2_PROTOCOL* mSmmBase2 = NULL

Definition at line 93 of file CpuPageTable.c.

Data Structures

Macros

Enumerations

Functions

Variables

Detailed Description

Macro Definition Documentation

◆ IA32_PAE_PDPTE_ATTRIBUTE_BITS

◆ IA32_PF_EC_ID

◆ IA32_PG_A

◆ IA32_PG_CD

◆ IA32_PG_D

◆ IA32_PG_NX

◆ IA32_PG_P

◆ IA32_PG_PAT_2M

◆ IA32_PG_PAT_4K

◆ IA32_PG_PMNT

◆ IA32_PG_PS

◆ IA32_PG_RW

◆ IA32_PG_U

◆ IA32_PG_WT

◆ MAX_DEBUG_MESSAGE_LENGTH

◆ MAX_PF_ENTRY_COUNT

◆ PAGE_ATTRIBUTE_BITS

◆ PAGE_ATTRIBUTE_BITS_POST_SPLIT

◆ PAGE_PROGATE_BITS

◆ PAGING_1G_ADDRESS_MASK_64

◆ PAGING_1G_MASK

◆ PAGING_2M_ADDRESS_MASK_64

◆ PAGING_2M_MASK

◆ PAGING_4K_ADDRESS_MASK_64

◆ PAGING_4K_MASK

◆ PAGING_PAE_INDEX_MASK

Enumeration Type Documentation

◆ PAGE_ACTION

◆ PAGE_ATTRIBUTE

Function Documentation

◆ AllocatePageTableMemory()

◆ AssignMemoryPageAttributes()

◆ ConvertMemoryPageAttributes()

◆ ConvertPageEntryAttribute()

◆ DebugExceptionHandler()

◆ DisableReadOnlyPageWriteProtect()

◆ EnableReadOnlyPageWriteProtect()

◆ GetAttributesFromPageEntry()

◆ GetCurrentPagingContext()

◆ GetPageTableEntry()

◆ InitializePageTableLib()

◆ InitializePageTablePool()

◆ IsExecuteDisableEnabled()

◆ IsInSmm()

◆ IsReadOnlyPageWriteProtected()

◆ NeedSplitPage()

◆ PageAttributeToLength()

◆ PageAttributeToMask()

◆ PageFaultExceptionHandler()

◆ RefreshGcdMemoryAttributesFromPaging()

◆ SplitPage()

Variable Documentation

◆ mLastPFEntryPointer

◆ mPageAttributeTable

◆ mPageTablePool

◆ mPageTablePoolLock

◆ mPagingContext

◆ mPFEntryCount

◆ mSmmBase2