9344f09215
https://bugzilla.tianocore.org/show_bug.cgi?id=1373 Replace BSD 2-Clause License with BSD+Patent License. This change is based on the following emails: https://lists.01.org/pipermail/edk2-devel/2019-February/036260.html https://lists.01.org/pipermail/edk2-devel/2018-October/030385.html RFCs with detailed process for the license change: V3: https://lists.01.org/pipermail/edk2-devel/2019-March/038116.html V2: https://lists.01.org/pipermail/edk2-devel/2019-March/037669.html V1: https://lists.01.org/pipermail/edk2-devel/2019-March/037500.html Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Michael D Kinney <michael.d.kinney@intel.com> Reviewed-by: Liming Gao <liming.gao@intel.com>
146 lines
3.6 KiB
NASM
146 lines
3.6 KiB
NASM
;
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; Copyright (c) 2014-2018, Linaro 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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AREA IoLibMmio, CODE, READONLY
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EXPORT MmioRead8Internal
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EXPORT MmioWrite8Internal
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EXPORT MmioRead16Internal
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EXPORT MmioWrite16Internal
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EXPORT MmioRead32Internal
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EXPORT MmioWrite32Internal
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EXPORT MmioRead64Internal
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EXPORT MmioWrite64Internal
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;
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; Reads an 8-bit MMIO register.
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;
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; Reads the 8-bit MMIO register specified by Address. The 8-bit read value is
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; returned. This function must guarantee that all MMIO read and write
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; operations are serialized.
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;
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; @param Address The MMIO register to read.
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;
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; @return The value read.
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;
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MmioRead8Internal
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ldrb r0, [r0]
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dmb
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bx lr
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;
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; Writes an 8-bit MMIO register.
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;
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; Writes the 8-bit MMIO register specified by Address with the value specified
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; by Value and returns Value. This function must guarantee that all MMIO read
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; and write operations are serialized.
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;
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; @param Address The MMIO register to write.
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; @param Value The value to write to the MMIO register.
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;
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MmioWrite8Internal
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dmb st
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strb r1, [r0]
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bx lr
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;
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; Reads a 16-bit MMIO register.
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;
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; Reads the 16-bit MMIO register specified by Address. The 16-bit read value is
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; returned. This function must guarantee that all MMIO read and write
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; operations are serialized.
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;
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; @param Address The MMIO register to read.
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;
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; @return The value read.
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;
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MmioRead16Internal
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ldrh r0, [r0]
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dmb
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bx lr
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;
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; Writes a 16-bit MMIO register.
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;
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; Writes the 16-bit MMIO register specified by Address with the value specified
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; by Value and returns Value. This function must guarantee that all MMIO read
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; and write operations are serialized.
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;
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; @param Address The MMIO register to write.
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; @param Value The value to write to the MMIO register.
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;
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MmioWrite16Internal
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dmb st
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strh r1, [r0]
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bx lr
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;
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; Reads a 32-bit MMIO register.
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;
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; Reads the 32-bit MMIO register specified by Address. The 32-bit read value is
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; returned. This function must guarantee that all MMIO read and write
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; operations are serialized.
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;
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; @param Address The MMIO register to read.
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;
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; @return The value read.
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;
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MmioRead32Internal
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ldr r0, [r0]
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dmb
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bx lr
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;
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; Writes a 32-bit MMIO register.
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;
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; Writes the 32-bit MMIO register specified by Address with the value specified
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; by Value and returns Value. This function must guarantee that all MMIO read
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; and write operations are serialized.
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;
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; @param Address The MMIO register to write.
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; @param Value The value to write to the MMIO register.
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;
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MmioWrite32Internal
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dmb st
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str r1, [r0]
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bx lr
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;
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; Reads a 64-bit MMIO register.
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;
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; Reads the 64-bit MMIO register specified by Address. The 64-bit read value is
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; returned. This function must guarantee that all MMIO read and write
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; operations are serialized.
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;
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; @param Address The MMIO register to read.
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;
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; @return The value read.
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;
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MmioRead64Internal
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ldr r1, [r0, #4]
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ldr r0, [r0]
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dmb
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bx lr
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;
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; Writes a 64-bit MMIO register.
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;
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; Writes the 64-bit MMIO register specified by Address with the value specified
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; by Value and returns Value. This function must guarantee that all MMIO read
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; and write operations are serialized.
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;
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; @param Address The MMIO register to write.
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; @param Value The value to write to the MMIO register.
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;
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MmioWrite64Internal
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dmb st
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str r2, [r0]
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str r3, [r0, #4]
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bx lr
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END
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