projects / mirror_edk2.git / blame
| Commit | Line | Data |
|---|---|---|
| 59e0bb0c | 1 | /// @file\r |
| 2 | /// IPF specific Machine Specific Registers accessing functions.\r | |
| 3 | ///\r | |
| bb817c56 HT |
4 | /// Copyright (c) 2008, Intel Corporation. All rights reserved.<BR>\r |
| 5 | /// This program and the accompanying materials\r | |
| 59e0bb0c | 6 | /// are licensed and made available under the terms and conditions of the BSD License\r |
| 7 | /// which accompanies this distribution. The full text of the license may be found at\r | |
| 8 | /// http://opensource.org/licenses/bsd-license.php\r | |
| 9 | ///\r | |
| 10 | /// THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
| 11 | /// WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
| 12 | ///\r | |
| 13 | ///\r | |
| 14 | ///\r | |
| 15 | \r | |
| 16 | \r | |
| 17 | //---------------------------------------------------------------------------------\r | |
| 18 | //++\r | |
| 19 | // AsmReadMsr\r | |
| 20 | //\r | |
| 21 | // Reads the current value of a Machine Specific Register (MSR).\r | |
| 22 | //\r | |
| 23 | // Reads and returns the current value of the Machine Specific Register specified by Index. No\r | |
| 24 | // parameter checking is performed on Index, and if the Index value is beyond the implemented MSR\r | |
| 25 | // register range, a Reserved Register/Field fault may occur. The caller must either guarantee that\r | |
| 26 | // Index is valid, or the caller must set up fault handlers to catch the faults. This function is\r | |
| 27 | // only available on IPF.\r | |
| 28 | //\r | |
| 29 | // Arguments :\r | |
| 30 | //\r | |
| 31 | // On Entry : The 8-bit Machine Specific Register index to read.\r | |
| 32 | //\r | |
| 33 | // Return Value: The current value of the Machine Specific Register specified by Index.\r | |
| 34 | //\r | |
| 35 | //--\r | |
| 36 | //----------------------------------------------------------------------------------\r | |
| 37 | .text\r | |
| 38 | .type AsmReadMsr, @function\r | |
| 39 | .proc AsmReadMsr\r | |
| 40 | .regstk 1, 0, 0, 0\r | |
| 41 | \r | |
| 42 | AsmReadMsr::\r | |
| 43 | mov r8=msr[in0];;\r | |
| 44 | br.ret.sptk b0;;\r | |
| 45 | .endp AsmReadMsr\r | |
| 46 | \r | |
| 47 | //---------------------------------------------------------------------------------\r | |
| 48 | //++\r | |
| 49 | // AsmWriteMsr\r | |
| 50 | //\r | |
| 51 | // Writes the current value of a Machine Specific Register (MSR).\r | |
| 52 | //\r | |
| 53 | // Writes Value to the Machine Specific Register specified by Index. Value is returned. No\r | |
| 54 | // parameter checking is performed on Index, and if the Index value is beyond the implemented MSR\r | |
| 55 | // register range, a Reserved Register/Field fault may occur. The caller must either guarantee that\r | |
| 56 | // Index is valid, or the caller must set up fault handlers to catch the faults. This function is\r | |
| 57 | // only available on IPF.\r | |
| 58 | //\r | |
| 59 | // Arguments :\r | |
| 60 | //\r | |
| 61 | // On Entry : The 8-bit Machine Specific Register index to write.\r | |
| 62 | // The 64-bit value to write to the Machine Specific Register.\r | |
| 63 | //\r | |
| 64 | // Return Value: The 64-bit value to write to the Machine Specific Register.\r | |
| 65 | //\r | |
| 66 | //--\r | |
| 67 | //----------------------------------------------------------------------------------\r | |
| 68 | .text\r | |
| 69 | .type AsmWriteMsr, @function\r | |
| 70 | .proc AsmWriteMsr\r | |
| 71 | .regstk 2, 0, 0, 0\r | |
| 72 | \r | |
| 73 | AsmWriteMsr::\r | |
| 74 | mov msr[in0] = in1\r | |
| 75 | mov r8 = in1;;\r | |
| 76 | srlz.d;;\r | |
| 77 | br.ret.sptk b0;;\r | |
| 78 | .endp AsmWriteMsr\r | |
| 79 | \r |