1/// @file 2/// IPF specific Machine Specific Registers accessing functions. 3/// 4/// Copyright (c) 2008, Intel Corporation. All rights reserved.<BR> 5/// This program and the accompanying materials 6/// are licensed and made available under the terms and conditions of the BSD License 7/// which accompanies this distribution. The full text of the license may be found at 8/// http://opensource.org/licenses/bsd-license.php. 9/// 10/// THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, 11/// WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. 12/// 13/// 14/// 15 16 17//--------------------------------------------------------------------------------- 18//++ 19// AsmReadMsr 20// 21// Reads the current value of a Machine Specific Register (MSR). 22// 23// Reads and returns the current value of the Machine Specific Register specified by Index. No 24// parameter checking is performed on Index, and if the Index value is beyond the implemented MSR 25// register range, a Reserved Register/Field fault may occur. The caller must either guarantee that 26// Index is valid, or the caller must set up fault handlers to catch the faults. This function is 27// only available on IPF. 28// 29// Arguments : 30// 31// On Entry : The 8-bit Machine Specific Register index to read. 32// 33// Return Value: The current value of the Machine Specific Register specified by Index. 34// 35//-- 36//---------------------------------------------------------------------------------- 37.text 38.type AsmReadMsr, @function 39.proc AsmReadMsr 40.regstk 1, 0, 0, 0 41 42AsmReadMsr:: 43 mov r8=msr[in0];; 44 br.ret.sptk b0;; 45.endp AsmReadMsr 46 47//--------------------------------------------------------------------------------- 48//++ 49// AsmWriteMsr 50// 51// Writes the current value of a Machine Specific Register (MSR). 52// 53// Writes Value to the Machine Specific Register specified by Index. Value is returned. No 54// parameter checking is performed on Index, and if the Index value is beyond the implemented MSR 55// register range, a Reserved Register/Field fault may occur. The caller must either guarantee that 56// Index is valid, or the caller must set up fault handlers to catch the faults. This function is 57// only available on IPF. 58// 59// Arguments : 60// 61// On Entry : The 8-bit Machine Specific Register index to write. 62// The 64-bit value to write to the Machine Specific Register. 63// 64// Return Value: The 64-bit value to write to the Machine Specific Register. 65// 66//-- 67//---------------------------------------------------------------------------------- 68.text 69.type AsmWriteMsr, @function 70.proc AsmWriteMsr 71.regstk 2, 0, 0, 0 72 73AsmWriteMsr:: 74 mov msr[in0] = in1 75 mov r8 = in1;; 76 srlz.d;; 77 br.ret.sptk b0;; 78.endp AsmWriteMsr 79 80