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59e0bb0c | 1 | /// @file\r |
2 | /// IPF specific Machine Specific Registers accessing functions.\r | |
3 | ///\r | |
4 | /// Copyright (c) 2008, Intel Corporation\r | |
5 | /// All rights reserved. This program and the accompanying materials\r | |
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 |