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aad6137d | 1 | /// @file\r |
2 | /// IPF specific control register reading 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 | |
aad6137d | 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 | |
c5b16b1b | 8 | /// http://opensource.org/licenses/bsd-license.php.\r |
aad6137d | 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 | |
aad6137d | 17 | \r |
59e0bb0c | 18 | //---------------------------------------------------------------------------------\r |
19 | //++\r | |
20 | // AsmReadControlRegister\r | |
21 | //\r | |
22 | // Reads a 64-bit control register.\r | |
23 | //\r | |
24 | // Reads and returns the control register specified by Index.\r | |
25 | // If Index is invalid then 0xFFFFFFFFFFFFFFFF is returned. This function is only available on IPF.\r | |
26 | //\r | |
27 | // Arguments :\r | |
28 | //\r | |
29 | // On Entry : The index of the control register to read.\r | |
30 | //\r | |
31 | // Return Value: The control register specified by Index.\r | |
32 | //\r | |
33 | //--\r | |
34 | //----------------------------------------------------------------------------------\r | |
35 | .text\r | |
36 | .type AsmReadControlRegister, @function\r | |
37 | .proc AsmReadControlRegister\r | |
38 | .regstk 1, 0, 0, 0\r | |
39 | \r | |
40 | AsmReadControlRegister::\r | |
41 | //\r | |
42 | // CRs are defined in the ranges 0-25 and 64-81 (with some holes).\r | |
43 | // Compact this list by subtracting 32 from the top range.\r | |
44 | // 0-25, 64-81 -> 0-25, 32-49\r | |
45 | //\r | |
46 | mov r15=2\r | |
47 | mov r14=pr // save predicates\r | |
48 | cmp.leu p6,p7=64,in0 // p6 = CR# >= 64\r | |
49 | ;;\r | |
50 | (p7) cmp.leu p7,p0=32,in0 // p7 = 32 <= CR# < 64\r | |
51 | (p6) add in0=-32,in0 // if (CR >= 64) CR# -= 32\r | |
52 | ;;\r | |
53 | (p7) mov r15=0 // if bad range (32-63)\r | |
54 | ;;\r | |
55 | mov ret0=-1 // in case of illegal CR #\r | |
56 | shl r15=r15,in0 // r15 = 0x2 << CR#\r | |
57 | ;;\r | |
58 | mov pr=r15,-1\r | |
59 | ;;\r | |
60 | \r | |
61 | //\r | |
62 | // At this point the predicates contain a bit field of the\r | |
63 | // CR desired. (The bit is the CR+1, since pr0 is always 1.)\r | |
64 | //\r | |
65 | .pred.rel "mutex",p1,p2,p3,p9,p17,p18,p20,p21,p22,p23,p24,p25,p26,\\r | |
66 | p33,p34,p35,p36,p37,p38,p39,p40,p41,p42,p43,p49,p50\r | |
67 | (p1) mov ret0=cr.dcr // cr0\r | |
68 | (p2) mov ret0=cr.itm // cr1\r | |
69 | (p3) mov ret0=cr.iva // cr2\r | |
70 | (p9) mov ret0=cr.pta // cr8\r | |
71 | (p17) mov ret0=cr.ipsr // cr16\r | |
72 | (p18) mov ret0=cr.isr // cr17\r | |
73 | (p20) mov ret0=cr.iip // cr19\r | |
74 | (p21) mov ret0=cr.ifa // cr20\r | |
75 | (p22) mov ret0=cr.itir // cr21\r | |
76 | (p23) mov ret0=cr.iipa // cr22\r | |
77 | (p24) mov ret0=cr.ifs // cr23\r | |
78 | (p25) mov ret0=cr.iim // cr24\r | |
79 | (p26) mov ret0=cr.iha // cr25\r | |
80 | \r | |
81 | // This is the translated (-32) range.\r | |
82 | \r | |
83 | (p33) mov ret0=cr.lid // cr64\r | |
84 | (p34) mov ret0=cr.ivr // cr65\r | |
85 | (p35) mov ret0=cr.tpr // cr66\r | |
86 | (p36) mov ret0=cr.eoi // cr67\r | |
87 | (p37) mov ret0=cr.irr0 // cr68\r | |
88 | (p38) mov ret0=cr.irr1 // cr69\r | |
89 | (p39) mov ret0=cr.irr2 // cr70\r | |
90 | (p40) mov ret0=cr.irr3 // cr71\r | |
91 | (p41) mov ret0=cr.itv // cr72\r | |
92 | (p42) mov ret0=cr.pmv // cr73\r | |
93 | (p43) mov ret0=cr.cmcv // cr74\r | |
94 | (p49) mov ret0=cr.lrr0 // cr80\r | |
95 | (p50) mov ret0=cr.lrr1 // cr81\r | |
96 | \r | |
97 | //\r | |
98 | // Restore predicates and return.\r | |
99 | //\r | |
100 | mov pr=r14,-1\r | |
101 | br.ret.sptk b0\r | |
102 | .endp\r |