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1 | # |
1 | # |
2 | # Copyright (c) 2005 Jakub Jermar |
2 | # Copyright (c) 2005 Jakub Jermar |
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 | #include <kernel/arch/context_offset.h> |
29 | #include <kernel/arch/context_offset.h> |
30 | 30 | ||
31 | .text |
31 | .text |
32 | 32 | ||
33 | .global context_save |
33 | .global context_save |
34 | .global context_restore |
34 | .global context_restore |
35 | 35 | ||
36 | context_save: |
36 | context_save: |
37 | CONTEXT_SAVE_ARCH_CORE %o0 |
37 | CONTEXT_SAVE_ARCH_CORE %o0 |
38 | retl |
38 | retl |
39 | mov 1, %o0 ! context_save_arch returns 1 |
39 | mov 1, %o0 ! context_save_arch returns 1 |
40 | 40 | ||
41 | context_restore: |
41 | context_restore: |
42 | # |
42 | # |
43 | # Flush all active windows. |
43 | # Flush all active windows. |
44 | # This is essential, because CONTEXT_LOAD overwrites |
44 | # This is essential, because CONTEXT_LOAD overwrites |
45 | # %sp of CWP - 1 with the value written to %fp of CWP. |
45 | # %sp of CWP - 1 with the value written to %fp of CWP. |
46 | # Flushing all active windows mitigates this problem |
46 | # Flushing all active windows mitigates this problem |
47 | # as CWP - 1 becomes the overlap window. |
47 | # as CWP - 1 becomes the overlap window. |
48 | # |
48 | # |
49 | flushw |
49 | flushw |
50 | 50 | ||
51 | CONTEXT_RESTORE_ARCH_CORE %o0 |
51 | CONTEXT_RESTORE_ARCH_CORE %o0 |
52 | retl |
52 | retl |
53 | xor %o0, %o0, %o0 ! context_restore_arch returns 0 |
53 | xor %o0, %o0, %o0 ! context_restore_arch returns 0 |
54 | 54 |