ArmMmuStandaloneMmLib.c File Reference

#include <Uefi.h>
#include <IndustryStandard/ArmMmSvc.h>
#include <IndustryStandard/ArmFfaSvc.h>
#include <Library/ArmLib.h>
#include <Library/ArmMmuLib.h>
#include <Library/ArmSvcLib.h>
#include <Library/BaseLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/DebugLib.h>
#include <Library/PcdLib.h>

Go to the source code of this file.

Functions
STATIC EFI_STATUS	SendMemoryPermissionRequest (IN OUT ARM_SVC_ARGS *SvcArgs, OUT INT32 *RetVal)
STATIC EFI_STATUS	GetMemoryPermissions (IN EFI_PHYSICAL_ADDRESS BaseAddress, OUT UINT32 *MemoryAttributes)
STATIC EFI_STATUS	RequestMemoryPermissionChange (IN EFI_PHYSICAL_ADDRESS BaseAddress, IN UINT64 Length, IN UINT32 Permissions)
EFI_STATUS	ArmSetMemoryRegionNoExec (IN EFI_PHYSICAL_ADDRESS BaseAddress, IN UINT64 Length)
EFI_STATUS	ArmClearMemoryRegionNoExec (IN EFI_PHYSICAL_ADDRESS BaseAddress, IN UINT64 Length)
EFI_STATUS	ArmSetMemoryRegionReadOnly (IN EFI_PHYSICAL_ADDRESS BaseAddress, IN UINT64 Length)
EFI_STATUS	ArmClearMemoryRegionReadOnly (IN EFI_PHYSICAL_ADDRESS BaseAddress, IN UINT64 Length)

Detailed Description

File managing the MMU for ARMv8 architecture in S-EL0

Copyright (c) 2017 - 2021, Arm Limited. All rights reserved.
Copyright (c) 2021, Linaro Limited SPDX-License-Identifier: BSD-2-Clause-Patent

Reference(s):

• [1] SPM based on the MM interface. (https://trustedfirmware-a.readthedocs.io/en/latest/components/ secure-partition-manager-mm.html)
• [2] Arm Firmware Framework for Armv8-A, DEN0077A, version 1.0 (https://developer.arm.com/documentation/den0077/a)

Definition in file ArmMmuStandaloneMmLib.c.

Function Documentation

ArmClearMemoryRegionNoExec()

EFI_STATUS ArmClearMemoryRegionNoExec	(	IN EFI_PHYSICAL_ADDRESS	BaseAddress,
		IN UINT64	Length
	)

Definition at line 264 of file ArmMmuStandaloneMmLib.c.

ArmClearMemoryRegionReadOnly()

EFI_STATUS ArmClearMemoryRegionReadOnly	(	IN EFI_PHYSICAL_ADDRESS	BaseAddress,
		IN UINT64	Length
	)

Definition at line 310 of file ArmMmuStandaloneMmLib.c.

ArmSetMemoryRegionNoExec()

EFI_STATUS ArmSetMemoryRegionNoExec	(	IN EFI_PHYSICAL_ADDRESS	BaseAddress,
		IN UINT64	Length
	)

Definition at line 241 of file ArmMmuStandaloneMmLib.c.

ArmSetMemoryRegionReadOnly()

EFI_STATUS ArmSetMemoryRegionReadOnly	(	IN EFI_PHYSICAL_ADDRESS	BaseAddress,
		IN UINT64	Length
	)

Definition at line 287 of file ArmMmuStandaloneMmLib.c.

GetMemoryPermissions()

STATIC EFI_STATUS GetMemoryPermissions	(	IN EFI_PHYSICAL_ADDRESS	BaseAddress,
		OUT UINT32 *	MemoryAttributes
	)

Request the permission attributes of a memory region from S-EL0.

Parameters

[in]	BaseAddress	Base address for the memory region.
[out]	MemoryAttributes	Pointer to return the memory attributes.

Return values

EFI_SUCCESS	Request successfull.
EFI_INVALID_PARAMETER	A parameter is invalid.
EFI_NOT_READY	Callee is busy or not in a state to handle this request.
EFI_UNSUPPORTED	This function is not implemented by the callee.
EFI_ABORTED	Message target ran into an unexpected error and has aborted.
EFI_ACCESS_DENIED	Access denied.
EFI_OUT_OF_RESOURCES	Out of memory to perform operation.

Definition at line 150 of file ArmMmuStandaloneMmLib.c.

RequestMemoryPermissionChange()

STATIC EFI_STATUS RequestMemoryPermissionChange	(	IN EFI_PHYSICAL_ADDRESS	BaseAddress,
		IN UINT64	Length,
		IN UINT32	Permissions
	)

Set the permission attributes of a memory region from S-EL0.

Parameters

[in]	BaseAddress	Base address for the memory region.
[in]	Length	Length of the memory region.
[in]	Permissions	Memory access controls attributes.

Return values

EFI_SUCCESS	Request successfull.
EFI_INVALID_PARAMETER	A parameter is invalid.
EFI_NOT_READY	Callee is busy or not in a state to handle this request.
EFI_UNSUPPORTED	This function is not implemented by the callee.
EFI_ABORTED	Message target ran into an unexpected error and has aborted.
EFI_ACCESS_DENIED	Access denied.
EFI_OUT_OF_RESOURCES	Out of memory to perform operation.

Definition at line 209 of file ArmMmuStandaloneMmLib.c.

SendMemoryPermissionRequest()

STATIC EFI_STATUS SendMemoryPermissionRequest	(	IN OUT ARM_SVC_ARGS *	SvcArgs,
		OUT INT32 *	RetVal
	)

Send memory permission request to target.

Parameters

[in,out]	SvcArgs	Pointer to SVC arguments to send. On return it contains the response parameters.
[out]	RetVal	Pointer to return the response value.

Return values

EFI_SUCCESS	Request successfull.
EFI_INVALID_PARAMETER	A parameter is invalid.
EFI_NOT_READY	Callee is busy or not in a state to handle this request.
EFI_UNSUPPORTED	This function is not implemented by the callee.
EFI_ABORTED	Message target ran into an unexpected error and has aborted.
EFI_ACCESS_DENIED	Access denied.
EFI_OUT_OF_RESOURCES	Out of memory to perform operation.

Definition at line 47 of file ArmMmuStandaloneMmLib.c.