| /// @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 | |