d7f03464b2
This base library encapsulates the MMU manipulation routines that have been factored out of ArmLib. The functionality covers initial creation of the 1:1 mapping in the page tables, and remapping regions to change permissions or cacheability attributes. Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Reviewed-by: Leif Lindholm <leif.lindholm@linaro.org>
33 lines
1.0 KiB
NASM
33 lines
1.0 KiB
NASM
//------------------------------------------------------------------------------
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//
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// Copyright (c) 2016, Linaro Limited. All rights reserved.
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//
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// This program and the accompanying materials
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// are licensed and made available under the terms and conditions of the BSD License
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// which accompanies this distribution. The full text of the license may be found at
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// http://opensource.org/licenses/bsd-license.php
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//
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// THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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// WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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//
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//------------------------------------------------------------------------------
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INCLUDE AsmMacroExport.inc
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//------------------------------------------------------------------------------
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RVCT_ASM_EXPORT ArmHasMpExtensions
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mrc p15,0,R0,c0,c0,5
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// Get Multiprocessing extension (bit31)
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lsr R0, R0, #31
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bx LR
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RVCT_ASM_EXPORT ArmReadIdMmfr0
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mrc p15, 0, r0, c0, c1, 4 ; Read ID_MMFR0 Register
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bx lr
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END
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