2 files changed, 123 insertions, 0 deletions
diff --git a/MdePkg/Library/BaseLib/BaseLib.inf b/MdePkg/Library/BaseLib/BaseLib.inf
index 519dea10e3..99280baaa2 100644
--- a/MdePkg/Library/BaseLib/BaseLib.inf
+++ b/MdePkg/Library/BaseLib/BaseLib.inf
@@ -586,6 +586,8 @@
   Ipf/AccessEicr.s
   Ipf/AccessDbr.s
   Ipf/AccessMsr.s        | INTEL
+  Ipf/AccessMsr.s        | GCC
+  Ipf/AccessMsrDb.s      | MSFT
   Ipf/FlushCacheRange.s
   Ipf/InternalSwitchStack.c
   Ipf/GetInterruptState.s
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
+