ArmMmuLib.h File Reference

#include <Uefi/UefiBaseType.h>
#include <Library/ArmLib.h>

Go to the source code of this file.

Functions
EFI_STATUS EFIAPI	ArmConfigureMmu (IN ARM_MEMORY_REGION_DESCRIPTOR *MemoryTable, OUT VOID **TranslationTableBase OPTIONAL, OUT UINTN *TranslationTableSize OPTIONAL)
VOID EFIAPI	ArmReplaceLiveTranslationEntry (IN UINT64 *Entry, IN UINT64 Value, IN UINT64 RegionStart, IN BOOLEAN DisableMmu)
EFI_STATUS	ArmSetMemoryAttributes (IN EFI_PHYSICAL_ADDRESS BaseAddress, IN UINT64 Length, IN UINT64 Attributes, IN UINT64 AttributeMask)

Detailed Description

Copyright (c) 2015 - 2016, Linaro Ltd. All rights reserved.

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

Definition in file ArmMmuLib.h.

Function Documentation

ArmConfigureMmu()

EFI_STATUS EFIAPI ArmConfigureMmu	(	IN ARM_MEMORY_REGION_DESCRIPTOR *	MemoryTable,
		OUT VOID **TranslationTableBase	OPTIONAL,
		OUT UINTN *TranslationTableSize	OPTIONAL
	)

Definition at line 557 of file ArmMmuLibCore.c.

ArmSetMemoryAttributes()

EFI_STATUS ArmSetMemoryAttributes	(	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.

If Attributes contains a memory type attribute (EFI_MEMORY_UC/WC/WT/WB), the region is mapped according to this memory type, and additional memory permission attributes (EFI_MEMORY_RP/RO/XP) are taken into account as well, discarding any permission attributes that are currently set for the region. AttributeMask is ignored in this case, and must be set to 0x0.

If Attributes contains only a combination of memory permission attributes (EFI_MEMORY_RP/RO/XP), each page in the region will retain its existing memory type, even if it is not uniformly set across the region. In this case, AttributesMask may be set to a mask of permission attributes, and memory permissions omitted from this mask will not be updated for any page in the region. All attributes appearing in Attributes must appear in AttributeMask as well. (Attributes & ~AttributeMask must produce 0x0)

Parameters

[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	Mask of memory attributes to set.
[in]	AttributeMask	Mask of memory attributes to take into account.

Return values

EFI_SUCCESS	The attributes were set for the memory region.
EFI_INVALID_PARAMETER	BaseAddress or Length is not suitably aligned. Invalid combination of Attributes and AttributeMask.
EFI_OUT_OF_RESOURCES	Requested attributes cannot be applied due to lack of system resources.

Definition at line 506 of file ArmMmuLibCore.c.