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>
44 lines
1.0 KiB
C
44 lines
1.0 KiB
C
/** @file
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AsmWriteMsr64 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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Writes a 64-bit value to a Machine Specific Register(MSR), and returns the
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value.
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Writes the 64-bit value specified by Value to the MSR specified by Index. The
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64-bit value written to the MSR is returned. No parameter checking is
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performed on Index or Value, and some of these may cause CPU exceptions. The
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caller must either guarantee that Index and Value are valid, or the caller
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must establish proper exception handlers. This function is only available on
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IA-32 and x64.
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@param Index The 32-bit MSR index to write.
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@param Value The 64-bit value to write to the MSR.
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@return Value
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**/
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UINT64
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EFIAPI
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AsmWriteMsr64 (
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IN UINT32 Index,
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IN UINT64 Value
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)
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{
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_asm {
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mov edx, dword ptr [Value + 4]
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mov eax, dword ptr [Value + 0]
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mov ecx, Index
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wrmsr
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}
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}
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