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| author | qhuang8 <qhuang8@6f19259b-4bc3-4df7-8a09-765794883524> | 2008-12-15 15:51:43 +0000 |
|---|---|---|
| committer | qhuang8 <qhuang8@6f19259b-4bc3-4df7-8a09-765794883524> | 2008-12-15 15:51:43 +0000 |
| commit | 59e0bb0cbde3c2228ecf555071490399852c02c9 (patch) | |
| tree | 7b8dabdfc4d3e8eabfe585ad6d0d7bd43dec0253 /MdePkg/Library/BaseLib/Ipf/AccessMsr.s | |
| parent | 43a99f081e9af6aef9c24d35540f1299441b2970 (diff) | |
| download | edk2-platforms-59e0bb0cbde3c2228ecf555071490399852c02c9.tar.xz | |
1. Simplify the implementation of AsmReadApplicationRegister() & AsmReadControlRegister() for IPF architecture.
2. Add AsmReadMsr() & AsmWriteMsr() for IPF architecture
3. update AsmCpuMisc.s to only support GCC tool chain to avoid symbol collision.
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@7034 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'MdePkg/Library/BaseLib/Ipf/AccessMsr.s')
| -rw-r--r-- | MdePkg/Library/BaseLib/Ipf/AccessMsr.s | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/MdePkg/Library/BaseLib/Ipf/AccessMsr.s b/MdePkg/Library/BaseLib/Ipf/AccessMsr.s new file mode 100644 index 0000000000..bb8ae34988 --- /dev/null +++ b/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. 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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