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>
39 lines
923 B
C
39 lines
923 B
C
/** @file
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AsmMwait function
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Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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/**
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Executes an MWAIT instruction.
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Executes an MWAIT instruction with the register state specified by Eax and
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Ecx. Returns Eax. This function is only available on IA-32 and x64.
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@param RegisterEax The value to load into EAX or RAX before executing the MONITOR
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instruction.
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@param RegisterEcx The value to load into ECX or RCX before executing the MONITOR
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instruction.
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@return RegisterEax
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**/
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UINTN
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EFIAPI
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AsmMwait (
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IN UINTN RegisterEax,
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IN UINTN RegisterEcx
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)
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{
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_asm {
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mov eax, RegisterEax
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mov ecx, RegisterEcx
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_emit 0x0f // mwait
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_emit 0x01
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_emit 0xC9
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}
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}
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