mirror of
https://github.com/acidanthera/audk.git
synced 2025-07-19 11:44:24 +02:00
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
|
|
AsmWriteMsr64 function
|
|
|
|
Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>
|
|
SPDX-License-Identifier: BSD-2-Clause-Patent
|
|
|
|
**/
|
|
|
|
|
|
|
|
|
|
/**
|
|
Writes a 64-bit value to a Machine Specific Register(MSR), and returns the
|
|
value.
|
|
|
|
Writes the 64-bit value specified by Value to the MSR specified by Index. The
|
|
64-bit value written to the MSR is returned. No parameter checking is
|
|
performed on Index or Value, and some of these may cause CPU exceptions. The
|
|
caller must either guarantee that Index and Value are valid, or the caller
|
|
must establish proper exception handlers. This function is only available on
|
|
IA-32 and x64.
|
|
|
|
@param Index The 32-bit MSR index to write.
|
|
@param Value The 64-bit value to write to the MSR.
|
|
|
|
@return Value
|
|
|
|
**/
|
|
UINT64
|
|
EFIAPI
|
|
AsmWriteMsr64 (
|
|
IN UINT32 Index,
|
|
IN UINT64 Value
|
|
)
|
|
{
|
|
_asm {
|
|
mov edx, dword ptr [Value + 4]
|
|
mov eax, dword ptr [Value + 0]
|
|
mov ecx, Index
|
|
wrmsr
|
|
}
|
|
}
|
|
|