28dce5b130
Split the ARM permission fields in the short descriptors into an access flag and AP[2:1] as per the recommendation in the ARM ARM. This makes the access flag available separately, which allows us to implement EFI_MEMORY_RP memory analogous to how it will be implemented for AArch64. Signed-off-by: Ard Biesheuvel <ardb@kernel.org> Reviewed-by: Leif Lindholm <quic_llindhol@quicinc.com>
33 lines
905 B
C
33 lines
905 B
C
/** @file
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* File managing the MMU for ARMv7 architecture
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*
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* Copyright (c) 2011-2016, ARM Limited. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-2-Clause-Patent
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*
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**/
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#include <Uefi.h>
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#include <Library/ArmLib.h>
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#include <Chipset/ArmV7.h>
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UINT32
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ConvertSectionAttributesToPageAttributes (
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IN UINT32 SectionAttributes
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)
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{
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UINT32 PageAttributes;
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PageAttributes = 0;
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PageAttributes |= TT_DESCRIPTOR_CONVERT_TO_PAGE_CACHE_POLICY (SectionAttributes);
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PageAttributes |= TT_DESCRIPTOR_CONVERT_TO_PAGE_AP (SectionAttributes);
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PageAttributes |= TT_DESCRIPTOR_CONVERT_TO_PAGE_AF (SectionAttributes);
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PageAttributes |= TT_DESCRIPTOR_CONVERT_TO_PAGE_XN (SectionAttributes);
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PageAttributes |= TT_DESCRIPTOR_CONVERT_TO_PAGE_NG (SectionAttributes);
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PageAttributes |= TT_DESCRIPTOR_CONVERT_TO_PAGE_S (SectionAttributes);
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return PageAttributes;
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}
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