#include <PiPei.h>
#include <Ppi/ArmMpCoreInfo.h>
#include <Ppi/MemoryAttribute.h>
#include <Library/DebugLib.h>
#include <Library/PeimEntryPoint.h>
#include <Library/PeiServicesLib.h>
#include <Library/PcdLib.h>
#include <Library/HobLib.h>
#include <Library/ArmLib.h>
#include <Library/ArmMmuLib.h>

Functions
STATIC EFI_STATUS EFIAPI	SetMemoryPermissions (IN EDKII_MEMORY_ATTRIBUTE_PPI *This, IN EFI_PHYSICAL_ADDRESS BaseAddress, IN UINT64 Length, IN UINT64 Attributes, IN UINT64 AttributeMask)

EFI_STATUS EFIAPI	InitializeCpuPeim (IN EFI_PEI_FILE_HANDLE FileHandle, IN CONST EFI_PEI_SERVICES **PeiServices)

Variables
STATIC CONST EDKII_MEMORY_ATTRIBUTE_PPI	mMemoryAttributePpi

STATIC CONST EFI_PEI_PPI_DESCRIPTOR	mMemoryAttributePpiDesc

Detailed Description

Copyright (c) 2006, Intel Corporation. All rights reserved.
Copyright (c) 2011 Hewlett Packard Corporation. All rights reserved.
Copyright (c) 2011-2013, ARM Limited. All rights reserved.
Copyright (c) 2023, Google, LLC. All rights reserved.

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

Module Name:

MemoryInit.c

Abstract:

PEIM to provide fake memory init

Definition in file CpuPei.c.

Function Documentation

◆ InitializeCpuPeim()

EFI_STATUS EFIAPI InitializeCpuPeim	(	IN EFI_PEI_FILE_HANDLE	FileHandle,
		IN CONST EFI_PEI_SERVICES **	PeiServices
	)

Definition at line 127 of file CpuPei.c.

◆ SetMemoryPermissions()

STATIC EFI_STATUS EFIAPI SetMemoryPermissions	(	IN EDKII_MEMORY_ATTRIBUTE_PPI *	This,
		IN EFI_PHYSICAL_ADDRESS	BaseAddress,
		IN UINT64	Length,
		IN UINT64	Attributes,
		IN UINT64	AttributeMask
	)

Set the requested memory permission attributes on a region of memory.

BaseAddress and Length must be aligned to EFI_PAGE_SIZE.

Attributes must contain a combination of EFI_MEMORY_RP, EFI_MEMORY_RO and EFI_MEMORY_XP, and specifies the attributes that must be set for the region in question. Attributes that are omitted will be cleared from the region only if they are set in AttributeMask.

AttributeMask must contain a combination of EFI_MEMORY_RP, EFI_MEMORY_RO and EFI_MEMORY_XP, and specifies the attributes that the call will operate on. AttributeMask must not be 0x0, and must contain at least the bits set in Attributes.

Parameters

[in]	This	The protocol instance pointer.
[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	Memory attributes to set or clear.
[in]	AttributeMask	Mask of memory attributes to operate on.

Return values

EFI_SUCCESS	The attributes were set for the memory region.
EFI_INVALID_PARAMETER	Length is zero. AttributeMask is zero. AttributeMask lacks bits set in Attributes. BaseAddress or Length is not suitably aligned.
EFI_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 supported for the memory resource range specified by BaseAddress and Length.
EFI_OUT_OF_RESOURCES	Requested attributes cannot be applied due to lack of system resources.

Definition at line 81 of file CpuPei.c.

Variable Documentation

◆ mMemoryAttributePpi

STATIC CONST EDKII_MEMORY_ATTRIBUTE_PPI mMemoryAttributePpi

Initial value:

= {
  SetMemoryPermissions
}

Definition at line 101 of file CpuPei.c.

◆ mMemoryAttributePpiDesc

STATIC CONST EFI_PEI_PPI_DESCRIPTOR mMemoryAttributePpiDesc