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author | Guo Mang <mang.guo@intel.com> | 2016-12-22 15:57:14 +0800 |
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committer | Guo Mang <mang.guo@intel.com> | 2016-12-26 19:14:41 +0800 |
commit | 1760cf81e4b1847c6823ea3514a78dd120e19b6e (patch) | |
tree | 64a874b14050fe24d3bbc1bc13cd293abf8ae018 /Core/MdePkg/Library/BaseLib/Ipf/AccessMsr.s | |
parent | 7f05fa00f73038b425002566d3afe6c3ade2ccdb (diff) | |
download | edk2-platforms-1760cf81e4b1847c6823ea3514a78dd120e19b6e.tar.xz |
MdePkg: Move to new location
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Guo Mang <mang.guo@intel.com>
Diffstat (limited to 'Core/MdePkg/Library/BaseLib/Ipf/AccessMsr.s')
-rw-r--r-- | Core/MdePkg/Library/BaseLib/Ipf/AccessMsr.s | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/Core/MdePkg/Library/BaseLib/Ipf/AccessMsr.s b/Core/MdePkg/Library/BaseLib/Ipf/AccessMsr.s new file mode 100644 index 0000000000..11b3f1eafb --- /dev/null +++ b/Core/MdePkg/Library/BaseLib/Ipf/AccessMsr.s @@ -0,0 +1,79 @@ +/// @file
+/// IPF specific Machine Specific Registers accessing functions.
+///
+/// Copyright (c) 2008, Intel Corporation. All rights reserved.<BR>
+/// This program and the accompanying materials
+/// are licensed and made available under the terms and conditions of the BSD License
+/// which accompanies this distribution. The full text of the license may be found at
+/// http://opensource.org/licenses/bsd-license.php.
+///
+/// THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+/// WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+///
+///
+///
+
+
+//---------------------------------------------------------------------------------
+//++
+// AsmReadMsr
+//
+// Reads the current value of a Machine Specific Register (MSR).
+//
+// Reads and returns the current value of the Machine Specific Register specified by Index. No
+// parameter checking is performed on Index, and if the Index value is beyond the implemented MSR
+// register range, a Reserved Register/Field fault may occur. The caller must either guarantee that
+// Index is valid, or the caller must set up fault handlers to catch the faults. This function is
+// only available on IPF.
+//
+// Arguments :
+//
+// On Entry : The 8-bit Machine Specific Register index to read.
+//
+// Return Value: The current value of the Machine Specific Register specified by Index.
+//
+//--
+//----------------------------------------------------------------------------------
+.text
+.type AsmReadMsr, @function
+.proc AsmReadMsr
+.regstk 1, 0, 0, 0
+
+AsmReadMsr::
+ mov r8=msr[in0];;
+ br.ret.sptk b0;;
+.endp AsmReadMsr
+
+//---------------------------------------------------------------------------------
+//++
+// AsmWriteMsr
+//
+// Writes the current value of a Machine Specific Register (MSR).
+//
+// Writes Value to the Machine Specific Register specified by Index. Value is returned. No
+// parameter checking is performed on Index, and if the Index value is beyond the implemented MSR
+// register range, a Reserved Register/Field fault may occur. The caller must either guarantee that
+// Index is valid, or the caller must set up fault handlers to catch the faults. This function is
+// only available on IPF.
+//
+// Arguments :
+//
+// On Entry : The 8-bit Machine Specific Register index to write.
+// The 64-bit value to write to the Machine Specific Register.
+//
+// Return Value: The 64-bit value to write to the Machine Specific Register.
+//
+//--
+//----------------------------------------------------------------------------------
+.text
+.type AsmWriteMsr, @function
+.proc AsmWriteMsr
+.regstk 2, 0, 0, 0
+
+AsmWriteMsr::
+ mov msr[in0] = in1
+ mov r8 = in1;;
+ srlz.d;;
+ br.ret.sptk b0;;
+.endp AsmWriteMsr
+
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