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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 1113 | palkovsky | 1 | # |
| 2 | # Copyright (C) 2003-2004 Jakub Jermar |
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| 3 | # All rights reserved. |
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| 4 | # |
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| 5 | # Redistribution and use in source and binary forms, with or without |
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| 6 | # modification, are permitted provided that the following conditions |
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| 7 | # are met: |
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| 8 | # |
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| 9 | # - Redistributions of source code must retain the above copyright |
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| 10 | # notice, this list of conditions and the following disclaimer. |
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| 11 | # - Redistributions in binary form must reproduce the above copyright |
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| 12 | # notice, this list of conditions and the following disclaimer in the |
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| 13 | # documentation and/or other materials provided with the distribution. |
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| 14 | # - The name of the author may not be used to endorse or promote products |
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| 15 | # derived from this software without specific prior written permission. |
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| 16 | # |
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| 17 | # THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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| 18 | # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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| 19 | # OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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| 20 | # IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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| 21 | # INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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| 22 | # NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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| 23 | # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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| 24 | # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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| 25 | # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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| 26 | # THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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| 27 | # |
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| 28 | |||
| 29 | .text |
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| 30 | |||
| 31 | .set noat |
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| 32 | .set noreorder |
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| 33 | |||
| 34 | |||
| 35 | #include <arch/asm/regname.h> |
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| 36 | #include <libarch/context_offset.h> |
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| 37 | |||
| 38 | .global context_save |
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| 39 | .global context_restore |
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| 1660 | palkovsky | 40 | |
| 1113 | palkovsky | 41 | .macro CONTEXT_STORE r |
| 42 | sw $s0,OFFSET_S0(\r) |
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| 43 | sw $s1,OFFSET_S1(\r) |
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| 44 | sw $s2,OFFSET_S2(\r) |
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| 45 | sw $s3,OFFSET_S3(\r) |
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| 46 | sw $s4,OFFSET_S4(\r) |
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| 47 | sw $s5,OFFSET_S5(\r) |
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| 48 | sw $s6,OFFSET_S6(\r) |
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| 49 | sw $s7,OFFSET_S7(\r) |
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| 50 | sw $s8,OFFSET_S8(\r) |
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| 51 | sw $gp,OFFSET_GP(\r) |
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| 52 | sw $k1,OFFSET_TLS(\r) |
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| 1660 | palkovsky | 53 | |
| 54 | #ifdef CONFIG_MIPS_FPU |
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| 55 | mfc1 $t0,$20 |
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| 56 | sw $t0, OFFSET_F20(\r) |
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| 57 | |||
| 58 | mfc1 $t0,$21 |
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| 59 | sw $t0, OFFSET_F21(\r) |
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| 60 | |||
| 61 | mfc1 $t0,$22 |
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| 62 | sw $t0, OFFSET_F22(\r) |
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| 63 | |||
| 64 | mfc1 $t0,$23 |
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| 65 | sw $t0, OFFSET_F23(\r) |
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| 66 | |||
| 67 | mfc1 $t0,$24 |
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| 68 | sw $t0, OFFSET_F24(\r) |
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| 69 | |||
| 70 | mfc1 $t0,$25 |
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| 71 | sw $t0, OFFSET_F25(\r) |
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| 72 | |||
| 73 | mfc1 $t0,$26 |
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| 74 | sw $t0, OFFSET_F26(\r) |
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| 75 | |||
| 76 | mfc1 $t0,$27 |
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| 77 | sw $t0, OFFSET_F27(\r) |
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| 78 | |||
| 79 | mfc1 $t0,$28 |
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| 80 | sw $t0, OFFSET_F28(\r) |
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| 81 | |||
| 82 | mfc1 $t0,$29 |
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| 83 | sw $t0, OFFSET_F29(\r) |
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| 1113 | palkovsky | 84 | |
| 1660 | palkovsky | 85 | mfc1 $t0,$30 |
| 86 | sw $t0, OFFSET_F30(\r) |
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| 87 | #endif |
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| 88 | |||
| 1113 | palkovsky | 89 | sw $ra,OFFSET_PC(\r) |
| 90 | sw $sp,OFFSET_SP(\r) |
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| 91 | .endm |
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| 92 | |||
| 93 | .macro CONTEXT_LOAD r |
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| 94 | lw $s0,OFFSET_S0(\r) |
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| 95 | lw $s1,OFFSET_S1(\r) |
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| 96 | lw $s2,OFFSET_S2(\r) |
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| 97 | lw $s3,OFFSET_S3(\r) |
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| 98 | lw $s4,OFFSET_S4(\r) |
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| 99 | lw $s5,OFFSET_S5(\r) |
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| 100 | lw $s6,OFFSET_S6(\r) |
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| 101 | lw $s7,OFFSET_S7(\r) |
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| 102 | lw $s8,OFFSET_S8(\r) |
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| 103 | lw $gp,OFFSET_GP(\r) |
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| 104 | lw $k1,OFFSET_TLS(\r) |
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| 1660 | palkovsky | 105 | |
| 106 | #ifdef CONFIG_MIPS_FPU |
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| 107 | lw $t0, OFFSET_F20(\r) |
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| 108 | mtc1 $t0,$20 |
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| 109 | |||
| 110 | lw $t0, OFFSET_F21(\r) |
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| 111 | mtc1 $t0,$21 |
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| 112 | |||
| 113 | lw $t0, OFFSET_F22(\r) |
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| 114 | mtc1 $t0,$22 |
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| 115 | |||
| 116 | lw $t0, OFFSET_F23(\r) |
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| 117 | mtc1 $t0,$23 |
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| 118 | |||
| 119 | lw $t0, OFFSET_F24(\r) |
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| 120 | mtc1 $t0,$24 |
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| 121 | |||
| 122 | lw $t0, OFFSET_F25(\r) |
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| 123 | mtc1 $t0,$25 |
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| 124 | |||
| 125 | lw $t0, OFFSET_F26(\r) |
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| 126 | mtc1 $t0,$26 |
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| 127 | |||
| 128 | lw $t0, OFFSET_F27(\r) |
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| 129 | mtc1 $t0,$27 |
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| 130 | |||
| 131 | lw $t0, OFFSET_F28(\r) |
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| 132 | mtc1 $t0,$28 |
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| 133 | |||
| 134 | lw $t0, OFFSET_F29(\r) |
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| 135 | mtc1 $t0,$29 |
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| 136 | |||
| 137 | lw $t0, OFFSET_F30(\r) |
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| 138 | mtc1 $t0,$30 |
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| 139 | #endif |
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| 140 | |||
| 1113 | palkovsky | 141 | lw $ra,OFFSET_PC(\r) |
| 142 | lw $sp,OFFSET_SP(\r) |
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| 143 | .endm |
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| 144 | |||
| 145 | context_save: |
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| 146 | CONTEXT_STORE $a0 |
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| 147 | |||
| 148 | # context_save returns 1 |
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| 149 | j $ra |
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| 150 | li $v0, 1 |
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| 151 | |||
| 152 | context_restore: |
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| 153 | CONTEXT_LOAD $a0 |
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| 154 | |||
| 1123 | palkovsky | 155 | # Just for the jump into first function, but one instruction |
| 156 | # should not bother us |
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| 157 | move $t9, $ra |
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| 1113 | palkovsky | 158 | # context_restore returns 0 |
| 159 | j $ra |
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| 160 | xor $v0, $v0 |
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| 1123 | palkovsky | 161 |