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1 | # |
1 | # |
2 | # Copyright (C) 2005 Martin Decky |
2 | # Copyright (c) 2005 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 | #include <arch/asm/regname.h> |
29 | #include <arch/asm/regname.h> |
30 | #include <arch/context_offset.h> |
30 | #include <arch/context_offset.h> |
31 | 31 | ||
32 | .text |
32 | .text |
33 | 33 | ||
34 | .global context_save_arch |
34 | .global context_save_arch |
35 | .global context_restore_arch |
35 | .global context_restore_arch |
36 | 36 | ||
37 | .macro CONTEXT_STORE r |
37 | .macro CONTEXT_STORE r |
38 | stw sp, OFFSET_SP(\r) |
38 | stw sp, OFFSET_SP(\r) |
39 | stw r2, OFFSET_R2(\r) |
39 | stw r2, OFFSET_R2(\r) |
40 | stw r13, OFFSET_R13(\r) |
40 | stw r13, OFFSET_R13(\r) |
41 | stw r14, OFFSET_R14(\r) |
41 | stw r14, OFFSET_R14(\r) |
42 | stw r15, OFFSET_R15(\r) |
42 | stw r15, OFFSET_R15(\r) |
43 | stw r16, OFFSET_R16(\r) |
43 | stw r16, OFFSET_R16(\r) |
44 | stw r17, OFFSET_R17(\r) |
44 | stw r17, OFFSET_R17(\r) |
45 | stw r18, OFFSET_R18(\r) |
45 | stw r18, OFFSET_R18(\r) |
46 | stw r19, OFFSET_R19(\r) |
46 | stw r19, OFFSET_R19(\r) |
47 | stw r20, OFFSET_R20(\r) |
47 | stw r20, OFFSET_R20(\r) |
48 | stw r21, OFFSET_R21(\r) |
48 | stw r21, OFFSET_R21(\r) |
49 | stw r22, OFFSET_R22(\r) |
49 | stw r22, OFFSET_R22(\r) |
50 | stw r23, OFFSET_R23(\r) |
50 | stw r23, OFFSET_R23(\r) |
51 | stw r24, OFFSET_R24(\r) |
51 | stw r24, OFFSET_R24(\r) |
52 | stw r25, OFFSET_R25(\r) |
52 | stw r25, OFFSET_R25(\r) |
53 | stw r26, OFFSET_R26(\r) |
53 | stw r26, OFFSET_R26(\r) |
54 | stw r27, OFFSET_R27(\r) |
54 | stw r27, OFFSET_R27(\r) |
55 | stw r28, OFFSET_R28(\r) |
55 | stw r28, OFFSET_R28(\r) |
56 | stw r29, OFFSET_R29(\r) |
56 | stw r29, OFFSET_R29(\r) |
57 | stw r30, OFFSET_R30(\r) |
57 | stw r30, OFFSET_R30(\r) |
58 | stw r31, OFFSET_R31(\r) |
58 | stw r31, OFFSET_R31(\r) |
59 | .endm |
59 | .endm |
60 | 60 | ||
61 | .macro CONTEXT_LOAD r |
61 | .macro CONTEXT_LOAD r |
62 | lwz sp, OFFSET_SP(\r) |
62 | lwz sp, OFFSET_SP(\r) |
63 | lwz r2, OFFSET_R2(\r) |
63 | lwz r2, OFFSET_R2(\r) |
64 | lwz r13, OFFSET_R13(\r) |
64 | lwz r13, OFFSET_R13(\r) |
65 | lwz r14, OFFSET_R14(\r) |
65 | lwz r14, OFFSET_R14(\r) |
66 | lwz r15, OFFSET_R15(\r) |
66 | lwz r15, OFFSET_R15(\r) |
67 | lwz r16, OFFSET_R16(\r) |
67 | lwz r16, OFFSET_R16(\r) |
68 | lwz r17, OFFSET_R17(\r) |
68 | lwz r17, OFFSET_R17(\r) |
69 | lwz r18, OFFSET_R18(\r) |
69 | lwz r18, OFFSET_R18(\r) |
70 | lwz r19, OFFSET_R19(\r) |
70 | lwz r19, OFFSET_R19(\r) |
71 | lwz r20, OFFSET_R20(\r) |
71 | lwz r20, OFFSET_R20(\r) |
72 | lwz r21, OFFSET_R21(\r) |
72 | lwz r21, OFFSET_R21(\r) |
73 | lwz r22, OFFSET_R22(\r) |
73 | lwz r22, OFFSET_R22(\r) |
74 | lwz r23, OFFSET_R23(\r) |
74 | lwz r23, OFFSET_R23(\r) |
75 | lwz r24, OFFSET_R24(\r) |
75 | lwz r24, OFFSET_R24(\r) |
76 | lwz r25, OFFSET_R25(\r) |
76 | lwz r25, OFFSET_R25(\r) |
77 | lwz r26, OFFSET_R26(\r) |
77 | lwz r26, OFFSET_R26(\r) |
78 | lwz r27, OFFSET_R27(\r) |
78 | lwz r27, OFFSET_R27(\r) |
79 | lwz r28, OFFSET_R28(\r) |
79 | lwz r28, OFFSET_R28(\r) |
80 | lwz r29, OFFSET_R29(\r) |
80 | lwz r29, OFFSET_R29(\r) |
81 | lwz r30, OFFSET_R30(\r) |
81 | lwz r30, OFFSET_R30(\r) |
82 | lwz r31, OFFSET_R31(\r) |
82 | lwz r31, OFFSET_R31(\r) |
83 | .endm |
83 | .endm |
84 | 84 | ||
85 | context_save_arch: |
85 | context_save_arch: |
86 | CONTEXT_STORE r3 |
86 | CONTEXT_STORE r3 |
87 | 87 | ||
88 | mflr r4 |
88 | mflr r4 |
89 | stw r4, OFFSET_PC(r3) |
89 | stw r4, OFFSET_PC(r3) |
90 | 90 | ||
91 | mfcr r4 |
91 | mfcr r4 |
92 | stw r4, OFFSET_CR(r3) |
92 | stw r4, OFFSET_CR(r3) |
93 | 93 | ||
94 | # context_save returns 1 |
94 | # context_save returns 1 |
95 | li r3, 1 |
95 | li r3, 1 |
96 | blr |
96 | blr |
97 | 97 | ||
98 | context_restore_arch: |
98 | context_restore_arch: |
99 | CONTEXT_LOAD r3 |
99 | CONTEXT_LOAD r3 |
100 | 100 | ||
101 | lwz r4, OFFSET_CR(r3) |
101 | lwz r4, OFFSET_CR(r3) |
102 | mtcr r4 |
102 | mtcr r4 |
103 | 103 | ||
104 | lwz r4, OFFSET_PC(r3) |
104 | lwz r4, OFFSET_PC(r3) |
105 | mtlr r4 |
105 | mtlr r4 |
106 | 106 | ||
107 | # context_restore returns 0 |
107 | # context_restore returns 0 |
108 | li r3, 0 |
108 | li r3, 0 |
109 | blr |
109 | blr |
110 | 110 |