0487cac09f
When updating a page table descriptor in a way that requires break before make, we temporarily disable the MMU to ensure that we don't unmap the memory region that the code itself is executing from. However, this is a condition we can check in a straight-forward manner, and if the regions are disjoint, we don't have to bother with the MMU controls, and we can just perform an ordinary break before make. Signed-off-by: Ard Biesheuvel <ardb@kernel.org> Reviewed-by: Leif Lindholm <quic_llindhol@quicinc.com>
69 lines
1.3 KiB
C
69 lines
1.3 KiB
C
/** @file
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Copyright (c) 2015 - 2016, Linaro Ltd. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#ifndef ARM_MMU_LIB_H_
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#define ARM_MMU_LIB_H_
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#include <Uefi/UefiBaseType.h>
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#include <Library/ArmLib.h>
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EFI_STATUS
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EFIAPI
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ArmConfigureMmu (
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IN ARM_MEMORY_REGION_DESCRIPTOR *MemoryTable,
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OUT VOID **TranslationTableBase OPTIONAL,
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OUT UINTN *TranslationTableSize OPTIONAL
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);
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EFI_STATUS
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EFIAPI
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ArmSetMemoryRegionNoExec (
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IN EFI_PHYSICAL_ADDRESS BaseAddress,
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IN UINT64 Length
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);
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EFI_STATUS
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EFIAPI
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ArmClearMemoryRegionNoExec (
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IN EFI_PHYSICAL_ADDRESS BaseAddress,
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IN UINT64 Length
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);
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EFI_STATUS
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EFIAPI
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ArmSetMemoryRegionReadOnly (
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IN EFI_PHYSICAL_ADDRESS BaseAddress,
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IN UINT64 Length
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);
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EFI_STATUS
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EFIAPI
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ArmClearMemoryRegionReadOnly (
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IN EFI_PHYSICAL_ADDRESS BaseAddress,
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IN UINT64 Length
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);
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VOID
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EFIAPI
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ArmReplaceLiveTranslationEntry (
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IN UINT64 *Entry,
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IN UINT64 Value,
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IN UINT64 RegionStart,
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IN BOOLEAN DisableMmu
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);
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EFI_STATUS
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ArmSetMemoryAttributes (
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IN EFI_PHYSICAL_ADDRESS BaseAddress,
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IN UINT64 Length,
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IN UINT64 Attributes
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);
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#endif // ARM_MMU_LIB_H_
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