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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> |
34 | #include <libarch/regname.h> |
| 35 | #include <arch/context_offset.h> |
35 | #include <arch/context_offset.h> |
| 36 | 36 | ||
| 37 | context_save: |
37 | context_save: |
| 38 | CONTEXT_SAVE_ARCH_CORE r3 |
38 | CONTEXT_SAVE_ARCH_CORE r3 |
| 39 | 39 | ||
| 40 | mflr r4 |
40 | mflr r4 |
| 41 | stw r4, OFFSET_PC(r3) |
41 | stw r4, OFFSET_PC(r3) |
| 42 | 42 | ||
| 43 | mfcr r4 |
43 | mfcr r4 |
| 44 | stw r4, OFFSET_CR(r3) |
44 | stw r4, OFFSET_CR(r3) |
| 45 | 45 | ||
| 46 | # context_save returns 1 |
46 | # context_save returns 1 |
| 47 | li r3, 1 |
47 | li r3, 1 |
| 48 | blr |
48 | blr |
| 49 | 49 | ||
| 50 | 50 | ||
| 51 | context_restore: |
51 | context_restore: |
| 52 | CONTEXT_RESTORE_ARCH_CORE r3 |
52 | CONTEXT_RESTORE_ARCH_CORE r3 |
| 53 | 53 | ||
| 54 | lwz r4, OFFSET_CR(r3) |
54 | lwz r4, OFFSET_CR(r3) |
| 55 | mtcr r4 |
55 | mtcr r4 |
| 56 | 56 | ||
| 57 | lwz r4, OFFSET_PC(r3) |
57 | lwz r4, OFFSET_PC(r3) |
| 58 | mtlr r4 |
58 | mtlr r4 |
| 59 | 59 | ||
| 60 | # context_restore returns 0 |
60 | # context_restore returns 0 |
| 61 | li r3, 0 |
61 | li r3, 0 |
| 62 | blr |
62 | blr |
| 63 | 63 | ||