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| 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 | .set nomacro |
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| 34 | |||
| 35 | |||
| 36 | #include <arch/asm/regname.h> |
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| 37 | #include <libarch/context_offset.h> |
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| 38 | |||
| 39 | .global context_save |
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| 40 | .global context_restore |
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| 41 | |||
| 42 | .macro CONTEXT_STORE r |
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| 43 | sw $s0,OFFSET_S0(\r) |
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| 44 | sw $s1,OFFSET_S1(\r) |
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| 45 | sw $s2,OFFSET_S2(\r) |
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| 46 | sw $s3,OFFSET_S3(\r) |
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| 47 | sw $s4,OFFSET_S4(\r) |
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| 48 | sw $s5,OFFSET_S5(\r) |
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| 49 | sw $s6,OFFSET_S6(\r) |
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| 50 | sw $s7,OFFSET_S7(\r) |
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| 51 | sw $s8,OFFSET_S8(\r) |
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| 52 | sw $gp,OFFSET_GP(\r) |
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| 53 | sw $k1,OFFSET_TLS(\r) |
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| 54 | |||
| 55 | sw $ra,OFFSET_PC(\r) |
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| 56 | sw $sp,OFFSET_SP(\r) |
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| 57 | .endm |
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| 58 | |||
| 59 | .macro CONTEXT_LOAD r |
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| 60 | lw $s0,OFFSET_S0(\r) |
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| 61 | lw $s1,OFFSET_S1(\r) |
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| 62 | lw $s2,OFFSET_S2(\r) |
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| 63 | lw $s3,OFFSET_S3(\r) |
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| 64 | lw $s4,OFFSET_S4(\r) |
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| 65 | lw $s5,OFFSET_S5(\r) |
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| 66 | lw $s6,OFFSET_S6(\r) |
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| 67 | lw $s7,OFFSET_S7(\r) |
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| 68 | lw $s8,OFFSET_S8(\r) |
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| 69 | lw $gp,OFFSET_GP(\r) |
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| 70 | lw $k1,OFFSET_TLS(\r) |
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| 71 | |||
| 72 | lw $ra,OFFSET_PC(\r) |
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| 73 | lw $sp,OFFSET_SP(\r) |
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| 74 | .endm |
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| 75 | |||
| 76 | context_save: |
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| 77 | CONTEXT_STORE $a0 |
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| 78 | |||
| 79 | # context_save returns 1 |
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| 80 | j $ra |
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| 81 | li $v0, 1 |
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| 82 | |||
| 83 | context_restore: |
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| 84 | CONTEXT_LOAD $a0 |
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| 85 | |||
| 86 | # context_restore returns 0 |
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| 87 | j $ra |
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| 88 | xor $v0, $v0 |