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1 | # |
1 | # |
2 | # Copyright (C) 2001-2004 Jakub Jermar |
2 | # Copyright (C) 2001-2004 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 | #define __ASM__ |
29 | #define __ASM__ |
30 | #include <arch/asm/regname.h> |
30 | #include <arch/asm/regname.h> |
31 | #include "context_offset.h" |
31 | #include <arch/context_offset.h> |
32 | 32 | ||
33 | .text |
33 | .text |
34 | 34 | ||
35 | .set noat |
35 | .set noat |
36 | .set noreorder |
36 | .set noreorder |
37 | .set nomacro |
37 | .set nomacro |
38 | 38 | ||
39 | .global context_save |
39 | .global context_save |
40 | .global context_restore |
40 | .global context_restore |
41 | 41 | ||
42 | .macro CONTEXT_STORE r |
42 | .macro CONTEXT_STORE r |
43 | sw $s0,OFFSET_S0(\r) |
43 | sw $s0,OFFSET_S0(\r) |
44 | sw $s1,OFFSET_S1(\r) |
44 | sw $s1,OFFSET_S1(\r) |
45 | sw $s2,OFFSET_S2(\r) |
45 | sw $s2,OFFSET_S2(\r) |
46 | sw $s3,OFFSET_S3(\r) |
46 | sw $s3,OFFSET_S3(\r) |
47 | sw $s4,OFFSET_S4(\r) |
47 | sw $s4,OFFSET_S4(\r) |
48 | sw $s5,OFFSET_S5(\r) |
48 | sw $s5,OFFSET_S5(\r) |
49 | sw $s6,OFFSET_S6(\r) |
49 | sw $s6,OFFSET_S6(\r) |
50 | sw $s7,OFFSET_S7(\r) |
50 | sw $s7,OFFSET_S7(\r) |
51 | sw $s8,OFFSET_S7(\r) |
51 | sw $s8,OFFSET_S7(\r) |
52 | sw $gp,OFFSET_GP(\r) |
52 | sw $gp,OFFSET_GP(\r) |
53 | 53 | ||
54 | sw $ra,OFFSET_PC(\r) |
54 | sw $ra,OFFSET_PC(\r) |
55 | sw $sp,OFFSET_SP(\r) |
55 | sw $sp,OFFSET_SP(\r) |
56 | .endm |
56 | .endm |
57 | 57 | ||
58 | .macro CONTEXT_LOAD r |
58 | .macro CONTEXT_LOAD r |
59 | lw $s0,OFFSET_S0(\r) |
59 | lw $s0,OFFSET_S0(\r) |
60 | lw $s1,OFFSET_S1(\r) |
60 | lw $s1,OFFSET_S1(\r) |
61 | lw $s2,OFFSET_S2(\r) |
61 | lw $s2,OFFSET_S2(\r) |
62 | lw $s3,OFFSET_S3(\r) |
62 | lw $s3,OFFSET_S3(\r) |
63 | lw $s4,OFFSET_S4(\r) |
63 | lw $s4,OFFSET_S4(\r) |
64 | lw $s5,OFFSET_S5(\r) |
64 | lw $s5,OFFSET_S5(\r) |
65 | lw $s6,OFFSET_S6(\r) |
65 | lw $s6,OFFSET_S6(\r) |
66 | lw $s7,OFFSET_S7(\r) |
66 | lw $s7,OFFSET_S7(\r) |
67 | lw $s8,OFFSET_S7(\r) |
67 | lw $s8,OFFSET_S7(\r) |
68 | lw $gp,OFFSET_GP(\r) |
68 | lw $gp,OFFSET_GP(\r) |
69 | 69 | ||
70 | lw $ra,OFFSET_PC(\r) |
70 | lw $ra,OFFSET_PC(\r) |
71 | lw $sp,OFFSET_SP(\r) |
71 | lw $sp,OFFSET_SP(\r) |
72 | .endm |
72 | .endm |
73 | 73 | ||
74 | 74 | ||
75 | context_save: |
75 | context_save: |
76 | CONTEXT_STORE $a0 |
76 | CONTEXT_STORE $a0 |
77 | 77 | ||
78 | # context_save returns 1 |
78 | # context_save returns 1 |
79 | j $31 |
79 | j $31 |
80 | li $2, 1 |
80 | li $2, 1 |
81 | 81 | ||
82 | context_restore: |
82 | context_restore: |
83 | CONTEXT_LOAD $a0 |
83 | CONTEXT_LOAD $a0 |
84 | 84 | ||
85 | # context_restore returns 0 |
85 | # context_restore returns 0 |
86 | j $31 |
86 | j $31 |
87 | xor $2, $2 |
87 | xor $2, $2 |
88 | 88 |