| 1 | #
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| 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 |
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| 29 | .text
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| 30 |
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| 31 | .set noat
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| 32 | .set noreorder
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| 33 |
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| 34 | #include <libarch/fibril_context.h>
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| 35 |
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| 36 | .global context_save
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| 37 | .global context_restore
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| 38 |
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| 39 | context_save:
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| 40 | sw $s0, CONTEXT_OFFSET_S0($a0)
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| 41 | sw $s1, CONTEXT_OFFSET_S1($a0)
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| 42 | sw $s2, CONTEXT_OFFSET_S2($a0)
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| 43 | sw $s3, CONTEXT_OFFSET_S3($a0)
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| 44 | sw $s4, CONTEXT_OFFSET_S4($a0)
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| 45 | sw $s5, CONTEXT_OFFSET_S5($a0)
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| 46 | sw $s6, CONTEXT_OFFSET_S6($a0)
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| 47 | sw $s7, CONTEXT_OFFSET_S7($a0)
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| 48 | sw $s8, CONTEXT_OFFSET_S8($a0)
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| 49 | sw $gp, CONTEXT_OFFSET_GP($a0)
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| 50 |
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| 51 | sw $k1, CONTEXT_OFFSET_TLS($a0)
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| 52 |
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| 53 | #ifdef CONFIG_FPU
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| 54 | mfc1 $t0, $20
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| 55 | sw $t0, CONTEXT_OFFSET_F20($a0)
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| 56 |
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| 57 | mfc1 $t0, $21
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| 58 | sw $t0, CONTEXT_OFFSET_F21($a0)
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| 59 |
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| 60 | mfc1 $t0, $22
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| 61 | sw $t0, CONTEXT_OFFSET_F22($a0)
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| 62 |
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| 63 | mfc1 $t0, $23
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| 64 | sw $t0, CONTEXT_OFFSET_F23($a0)
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| 65 |
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| 66 | mfc1 $t0, $24
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| 67 | sw $t0, CONTEXT_OFFSET_F24($a0)
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| 68 |
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| 69 | mfc1 $t0, $25
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| 70 | sw $t0, CONTEXT_OFFSET_F25($a0)
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| 71 |
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| 72 | mfc1 $t0, $26
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| 73 | sw $t0, CONTEXT_OFFSET_F26($a0)
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| 74 |
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| 75 | mfc1 $t0, $27
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| 76 | sw $t0, CONTEXT_OFFSET_F27($a0)
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| 77 |
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| 78 | mfc1 $t0, $28
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| 79 | sw $t0, CONTEXT_OFFSET_F28($a0)
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| 80 |
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| 81 | mfc1 $t0, $29
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| 82 | sw $t0, CONTEXT_OFFSET_F29($a0)
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| 83 |
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| 84 | mfc1 $t0, $30
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| 85 | sw $t0, CONTEXT_OFFSET_F30($a0)
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| 86 | #endif /* CONFIG_FPU */
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| 87 |
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| 88 | sw $ra, CONTEXT_OFFSET_PC($a0)
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| 89 | sw $sp, CONTEXT_OFFSET_SP($a0)
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| 90 |
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| 91 | # context_save returns 1
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| 92 | j $ra
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| 93 | li $v0, 1
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| 94 |
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| 95 | context_restore:
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| 96 | lw $s0, CONTEXT_OFFSET_S0($a0)
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| 97 | lw $s1, CONTEXT_OFFSET_S1($a0)
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| 98 | lw $s2, CONTEXT_OFFSET_S2($a0)
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| 99 | lw $s3, CONTEXT_OFFSET_S3($a0)
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| 100 | lw $s4, CONTEXT_OFFSET_S4($a0)
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| 101 | lw $s5, CONTEXT_OFFSET_S5($a0)
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| 102 | lw $s6, CONTEXT_OFFSET_S6($a0)
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| 103 | lw $s7, CONTEXT_OFFSET_S7($a0)
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| 104 | lw $s8, CONTEXT_OFFSET_S8($a0)
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| 105 | lw $gp, CONTEXT_OFFSET_GP($a0)
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| 106 | lw $k1, CONTEXT_OFFSET_TLS($a0)
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| 107 |
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| 108 | #ifdef CONFIG_FPU
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| 109 | lw $t0, CONTEXT_OFFSET_F20($a0)
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| 110 | mtc1 $t0, $20
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| 111 |
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| 112 | lw $t0, CONTEXT_OFFSET_F21($a0)
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| 113 | mtc1 $t0, $21
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| 114 |
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| 115 | lw $t0, CONTEXT_OFFSET_F22($a0)
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| 116 | mtc1 $t0, $22
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| 117 |
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| 118 | lw $t0, CONTEXT_OFFSET_F23($a0)
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| 119 | mtc1 $t0, $23
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| 120 |
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| 121 | lw $t0, CONTEXT_OFFSET_F24($a0)
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| 122 | mtc1 $t0, $24
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| 123 |
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| 124 | lw $t0, CONTEXT_OFFSET_F25($a0)
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| 125 | mtc1 $t0, $25
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| 126 |
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| 127 | lw $t0, CONTEXT_OFFSET_F26($a0)
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| 128 | mtc1 $t0, $26
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| 129 |
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| 130 | lw $t0, CONTEXT_OFFSET_F27($a0)
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| 131 | mtc1 $t0, $27
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| 132 |
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| 133 | lw $t0, CONTEXT_OFFSET_F28($a0)
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| 134 | mtc1 $t0, $28
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| 135 |
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| 136 | lw $t0, CONTEXT_OFFSET_F29($a0)
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| 137 | mtc1 $t0, $29
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| 138 |
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| 139 | lw $t0, CONTEXT_OFFSET_F30($a0)
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| 140 | mtc1 $t0, $30
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| 141 | #endif /* CONFIG_FPU */
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| 142 |
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| 143 | lw $ra, CONTEXT_OFFSET_PC($a0)
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| 144 | lw $sp, CONTEXT_OFFSET_SP($a0)
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| 145 |
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| 146 | # Just for the jump into first function,
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| 147 | # but one instruction should not bother us
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| 148 | move $t9, $ra
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| 149 |
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| 150 | # context_restore returns 0
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| 151 | j $ra
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| 152 | xor $v0, $v0
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