diff options
| author | qhuang8 <qhuang8@6f19259b-4bc3-4df7-8a09-765794883524> | 2008-12-17 09:58:39 +0000 |
|---|---|---|
| committer | qhuang8 <qhuang8@6f19259b-4bc3-4df7-8a09-765794883524> | 2008-12-17 09:58:39 +0000 |
| commit | 4e16d2cd28f3b3cc9d35f7c3576c410c9bf30ccd (patch) | |
| tree | adde8db95de13cfcda682d647eda37bfb5d86910 /MdePkg/Library/BaseLib/Ipf/AccessMsrDb.s | |
| parent | 6e55477da3f672da1484c4071481ee771e3227b9 (diff) | |
| download | edk2-platforms-4e16d2cd28f3b3cc9d35f7c3576c410c9bf30ccd.tar.xz | |
Add AccessMsrDb.s for MSFT tool chain. It uses raw data to represent instructions "mov msr[]=" and "mov =msr[]", which is only supported by INTEL & GCC tool chain.
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@7069 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'MdePkg/Library/BaseLib/Ipf/AccessMsrDb.s')
| -rw-r--r-- | MdePkg/Library/BaseLib/Ipf/AccessMsrDb.s | 121 |
1 files changed, 121 insertions, 0 deletions
diff --git a/MdePkg/Library/BaseLib/Ipf/AccessMsrDb.s b/MdePkg/Library/BaseLib/Ipf/AccessMsrDb.s new file mode 100644 index 0000000000..5fea504b1c --- /dev/null +++ b/MdePkg/Library/BaseLib/Ipf/AccessMsrDb.s @@ -0,0 +1,121 @@ +/// @file
+/// IPF specific Machine Specific Registers accessing functions.
+/// This implementation uses raw data to prepresent the assembly instruction of
+/// mov msr[]= and mov =msr[].
+///
+/// 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::
+//
+// The follow 16 bytes stand for the bundle of
+// mov r8=msr[in0];;
+// since MSFT tool chain does not support mov =msr[] instruction
+//
+ data1 0x0D
+ data1 0x40
+ data1 0x00
+ data1 0x40
+ data1 0x16
+ data1 0x04
+ data1 0x00
+ data1 0x00
+ data1 0x00
+ data1 0x02
+ data1 0x00
+ data1 0x00
+ data1 0x00
+ data1 0x00
+ data1 0x04
+ data1 0x00
+ 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::
+//
+// The follow 16 bytes stand for the bundle of
+// mov msr[in0] = in1
+// mov r8 = in1;;
+// since MSFT tool chain does not support mov msr[]= instruction
+//
+ data1 0x0D
+ data1 0x00
+ data1 0x84
+ data1 0x40
+ data1 0x06
+ data1 0x04
+ data1 0x00
+ data1 0x00
+ data1 0x00
+ data1 0x02
+ data1 0x00
+ data1 0x00
+ data1 0x01
+ data1 0x08
+ data1 0x01
+ data1 0x84
+ srlz.d;;
+ br.ret.sptk b0;;
+.endp AsmWriteMsr
+
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