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| 55 | jermar | 1 | # |
| 2 | # Copyright (C) 2005 Jakub Jermar |
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| 3 | # All rights reserved. |
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| 4 | # |
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| 5 | # Redistribution and use in source and binary forms, with or without |
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| 6 | # modification, are permitted provided that the following conditions |
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| 7 | # are met: |
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| 8 | # |
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| 9 | # - Redistributions of source code must retain the above copyright |
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| 10 | # notice, this list of conditions and the following disclaimer. |
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| 11 | # - Redistributions in binary form must reproduce the above copyright |
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| 12 | # notice, this list of conditions and the following disclaimer in the |
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| 13 | # documentation and/or other materials provided with the distribution. |
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| 14 | # - The name of the author may not be used to endorse or promote products |
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| 15 | # derived from this software without specific prior written permission. |
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| 16 | # |
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| 17 | # THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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| 18 | # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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| 19 | # OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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| 20 | # IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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| 21 | # INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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| 22 | # NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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| 23 | # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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| 24 | # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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| 25 | # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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| 26 | # THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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| 27 | # |
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| 28 | |||
| 29 | .text |
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| 30 | |||
| 31 | .global context_save |
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| 32 | .global context_restore |
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| 33 | |||
| 34 | context_save: |
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| 59 | jermar | 35 | alloc loc0 = ar.pfs, 1, 2, 0, 0 |
| 36 | |||
| 37 | /* |
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| 38 | * TODO: save the rest of the context registers. |
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| 39 | */ |
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| 40 | |||
| 41 | st8 [in0] = r1, 8 ;; |
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| 42 | st8 [in0] = r2, 8 ;; |
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| 43 | st8 [in0] = r3, 8 ;; |
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| 44 | st8 [in0] = r4, 8 ;; |
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| 45 | st8 [in0] = r5, 8 ;; |
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| 46 | st8 [in0] = r6, 8 ;; |
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| 47 | st8 [in0] = r7, 8 ;; |
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| 48 | st8 [in0] = r8, 8 ;; |
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| 49 | st8 [in0] = r9, 8 ;; |
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| 50 | st8 [in0] = r10, 8 ;; |
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| 51 | st8 [in0] = r11, 8 ;; |
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| 52 | st8 [in0] = r12, 8 ;; /* save sp */ |
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| 53 | st8 [in0] = r13, 8 ;; |
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| 54 | st8 [in0] = r14, 8 ;; |
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| 55 | st8 [in0] = r15, 8 ;; |
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| 56 | st8 [in0] = r16, 8 ;; |
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| 57 | st8 [in0] = r17, 8 ;; |
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| 58 | st8 [in0] = r18, 8 ;; |
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| 59 | st8 [in0] = r19, 8 ;; |
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| 60 | st8 [in0] = r20, 8 ;; |
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| 61 | st8 [in0] = r21, 8 ;; |
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| 62 | st8 [in0] = r22, 8 ;; |
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| 63 | st8 [in0] = r23, 8 ;; |
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| 64 | st8 [in0] = r24, 8 ;; |
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| 65 | st8 [in0] = r25, 8 ;; |
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| 66 | st8 [in0] = r26, 8 ;; |
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| 67 | st8 [in0] = r27, 8 ;; |
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| 68 | st8 [in0] = r28, 8 ;; |
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| 69 | st8 [in0] = r29, 8 ;; |
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| 70 | st8 [in0] = r30, 8 ;; |
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| 71 | st8 [in0] = r31, 8 ;; |
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| 72 | |||
| 73 | /* save pc */ |
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| 74 | mov loc1 = b0 ;; |
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| 75 | st8 [in0] = loc1, 8 |
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| 76 | |||
| 77 | mov ar.pfs = loc0 |
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| 78 | |||
| 79 | add r8 = r0, r0, 1 /* context_save returns 1 */ |
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| 60 | jermar | 80 | br.ret.sptk.many b0 |
| 55 | jermar | 81 | |
| 82 | context_restore: |
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| 59 | jermar | 83 | alloc loc0 = ar.pfs, 1, 2, 0, 0 |
| 84 | |||
| 85 | /* |
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| 86 | * TODO: restore the rest of the context registers. |
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| 87 | */ |
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| 88 | |||
| 89 | ld8 r1 = [in0], 8 ;; |
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| 90 | ld8 r2 = [in0], 8 ;; |
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| 91 | ld8 r3 = [in0], 8 ;; |
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| 92 | ld8 r4 = [in0], 8 ;; |
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| 93 | ld8 r5 = [in0], 8 ;; |
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| 94 | ld8 r6 = [in0], 8 ;; |
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| 95 | ld8 r7 = [in0], 8 ;; |
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| 96 | ld8 r8 = [in0], 8 ;; |
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| 97 | ld8 r9 = [in0], 8 ;; |
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| 98 | ld8 r10 = [in0], 8 ;; |
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| 99 | ld8 r11 = [in0], 8 ;; |
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| 100 | ld8 r12 = [in0], 8 ;; /* restore sp */ |
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| 101 | ld8 r13 = [in0], 8 ;; |
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| 102 | ld8 r14 = [in0], 8 ;; |
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| 103 | ld8 r15 = [in0], 8 ;; |
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| 104 | ld8 r16 = [in0], 8 ;; |
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| 105 | ld8 r17 = [in0], 8 ;; |
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| 106 | ld8 r18 = [in0], 8 ;; |
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| 107 | ld8 r19 = [in0], 8 ;; |
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| 108 | ld8 r20 = [in0], 8 ;; |
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| 109 | ld8 r21 = [in0], 8 ;; |
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| 110 | ld8 r22 = [in0], 8 ;; |
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| 111 | ld8 r23 = [in0], 8 ;; |
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| 112 | ld8 r24 = [in0], 8 ;; |
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| 113 | ld8 r25 = [in0], 8 ;; |
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| 114 | ld8 r26 = [in0], 8 ;; |
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| 115 | ld8 r27 = [in0], 8 ;; |
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| 116 | ld8 r28 = [in0], 8 ;; |
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| 117 | ld8 r29 = [in0], 8 ;; |
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| 118 | ld8 r30 = [in0], 8 ;; |
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| 119 | ld8 r31 = [in0], 8 ;; |
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| 120 | |||
| 121 | /* restore pc */ |
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| 122 | ld8 loc1 = [in0], 8 ;; |
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| 123 | mov b0 = loc1 |
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| 124 | |||
| 125 | mov ar.pfs = loc0 |
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| 126 | |||
| 127 | mov r8 = r0 /* context_restore returns 0 */ |
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| 60 | jermar | 128 | br.ret.sptk.many b0 |