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1 | # |
1 | # |
2 | # Copyright (C) 2006 Martin Decky |
2 | # Copyright (C) 2006 Martin Decky |
3 | # All rights reserved. |
3 | # All rights reserved. |
4 | # |
4 | # |
5 | # Redistribution and use in source and binary forms, with or without |
5 | # Redistribution and use in source and binary forms, with or without |
6 | # modification, are permitted provided that the following conditions |
6 | # modification, are permitted provided that the following conditions |
7 | # are met: |
7 | # are met: |
8 | # |
8 | # |
9 | # - Redistributions of source code must retain the above copyright |
9 | # - Redistributions of source code must retain the above copyright |
10 | # notice, this list of conditions and the following disclaimer. |
10 | # notice, this list of conditions and the following disclaimer. |
11 | # - Redistributions in binary form must reproduce the above copyright |
11 | # - Redistributions in binary form must reproduce the above copyright |
12 | # notice, this list of conditions and the following disclaimer in the |
12 | # notice, this list of conditions and the following disclaimer in the |
13 | # documentation and/or other materials provided with the distribution. |
13 | # documentation and/or other materials provided with the distribution. |
14 | # - The name of the author may not be used to endorse or promote products |
14 | # - The name of the author may not be used to endorse or promote products |
15 | # derived from this software without specific prior written permission. |
15 | # derived from this software without specific prior written permission. |
16 | # |
16 | # |
17 | # THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
17 | # THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
18 | # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
18 | # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
19 | # OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
19 | # OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
20 | # IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
20 | # IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
21 | # INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
21 | # INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
22 | # NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
22 | # NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
23 | # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
23 | # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
24 | # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
24 | # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
25 | # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
25 | # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
26 | # THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
26 | # THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | # |
27 | # |
28 | 28 | ||
29 | .text |
29 | .text |
30 | 30 | ||
31 | .global context_save |
31 | .global context_save |
32 | .global context_restore |
32 | .global context_restore |
33 | 33 | ||
- | 34 | #include <libarch/regname.h> |
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34 | #include <libarch/context_offset.h> |
35 | #include <libarch/context_offset.h> |
35 | 36 | ||
- | 37 | .macro CONTEXT_STORE r |
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- | 38 | stw sp, OFFSET_SP(\r) |
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- | 39 | stw r2, OFFSET_R2(\r) |
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- | 40 | stw r13, OFFSET_R13(\r) |
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- | 41 | stw r14, OFFSET_R14(\r) |
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- | 42 | stw r15, OFFSET_R15(\r) |
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- | 43 | stw r16, OFFSET_R16(\r) |
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- | 44 | stw r17, OFFSET_R17(\r) |
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- | 45 | stw r18, OFFSET_R18(\r) |
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- | 46 | stw r19, OFFSET_R19(\r) |
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- | 47 | stw r20, OFFSET_R20(\r) |
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- | 48 | stw r21, OFFSET_R21(\r) |
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- | 49 | stw r22, OFFSET_R22(\r) |
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- | 50 | stw r23, OFFSET_R23(\r) |
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- | 51 | stw r24, OFFSET_R24(\r) |
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- | 52 | stw r25, OFFSET_R25(\r) |
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- | 53 | stw r26, OFFSET_R26(\r) |
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- | 54 | stw r27, OFFSET_R27(\r) |
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- | 55 | stw r28, OFFSET_R28(\r) |
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- | 56 | stw r29, OFFSET_R29(\r) |
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- | 57 | stw r30, OFFSET_R30(\r) |
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- | 58 | stw r31, OFFSET_R31(\r) |
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- | 59 | .endm |
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- | 60 | ||
- | 61 | .macro CONTEXT_LOAD r |
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- | 62 | lwz sp, OFFSET_SP(\r) |
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- | 63 | lwz r2, OFFSET_R2(\r) |
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- | 64 | lwz r13, OFFSET_R13(\r) |
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- | 65 | lwz r14, OFFSET_R14(\r) |
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- | 66 | lwz r15, OFFSET_R15(\r) |
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- | 67 | lwz r16, OFFSET_R16(\r) |
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- | 68 | lwz r17, OFFSET_R17(\r) |
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- | 69 | lwz r18, OFFSET_R18(\r) |
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- | 70 | lwz r19, OFFSET_R19(\r) |
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- | 71 | lwz r20, OFFSET_R20(\r) |
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- | 72 | lwz r21, OFFSET_R21(\r) |
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- | 73 | lwz r22, OFFSET_R22(\r) |
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- | 74 | lwz r23, OFFSET_R23(\r) |
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- | 75 | lwz r24, OFFSET_R24(\r) |
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- | 76 | lwz r25, OFFSET_R25(\r) |
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- | 77 | lwz r26, OFFSET_R26(\r) |
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- | 78 | lwz r27, OFFSET_R27(\r) |
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- | 79 | lwz r28, OFFSET_R28(\r) |
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- | 80 | lwz r29, OFFSET_R29(\r) |
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- | 81 | lwz r30, OFFSET_R30(\r) |
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- | 82 | lwz r31, OFFSET_R31(\r) |
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- | 83 | .endm |
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- | 84 | ||
36 | context_save: |
85 | context_save: |
- | 86 | CONTEXT_STORE r3 |
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- | 87 | ||
- | 88 | mflr r4 |
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- | 89 | stw r4, OFFSET_PC(r3) |
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- | 90 | ||
- | 91 | mfcr r4 |
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- | 92 | stw r4, OFFSET_CR(r3) |
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- | 93 | ||
- | 94 | # context_save returns 1 |
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- | 95 | li r3, 1 |
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37 | blr |
96 | blr |
38 | 97 | ||
39 | 98 | ||
40 | context_restore: |
99 | context_restore: |
- | 100 | CONTEXT_LOAD r3 |
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- | 101 | ||
- | 102 | lwz r4, OFFSET_CR(r3) |
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- | 103 | mtcr r4 |
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- | 104 | ||
- | 105 | lwz r4, OFFSET_PC(r3) |
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- | 106 | mtlr r4 |
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- | 107 | ||
- | 108 | # context_restore returns 0 |
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- | 109 | li r3, 0 |
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41 | blr |
110 | blr |
42 | 111 | ||
43 | 112 | ||
44 |
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113 |
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45 | 114 | ||
46 | 115 | ||
47 | 116 |