| rjw | 1f88458 | 2022-01-06 17:20:42 +0800 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (c) 2015 Travis Geiselbrecht |
| 3 | * |
| 4 | * Permission is hereby granted, free of charge, to any person obtaining |
| 5 | * a copy of this software and associated documentation files |
| 6 | * (the "Software"), to deal in the Software without restriction, |
| 7 | * including without limitation the rights to use, copy, modify, merge, |
| 8 | * publish, distribute, sublicense, and/or sell copies of the Software, |
| 9 | * and to permit persons to whom the Software is furnished to do so, |
| 10 | * subject to the following conditions: |
| 11 | * |
| 12 | * The above copyright notice and this permission notice shall be |
| 13 | * included in all copies or substantial portions of the Software. |
| 14 | * |
| 15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| 16 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| 17 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. |
| 18 | * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY |
| 19 | * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, |
| 20 | * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE |
| 21 | * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
| 22 | */ |
| 23 | #include <asm.h> |
| 24 | |
| 25 | /* void mips_context_switch( |
| 26 | struct mips_context_switch_frame *oldcs, |
| 27 | struct mips_context_switch_frame *newcs); */ |
| 28 | FUNCTION(mips_context_switch) |
| 29 | # a0 = oldcs |
| 30 | # a1 = newcs |
| 31 | |
| 32 | # save old state |
| 33 | sw $s0, 0($a0) |
| 34 | sw $s1, 4($a0) |
| 35 | sw $s2, 8($a0) |
| 36 | sw $s3, 12($a0) |
| 37 | sw $s4, 16($a0) |
| 38 | sw $s5, 20($a0) |
| 39 | sw $s6, 24($a0) |
| 40 | sw $s7, 28($a0) |
| 41 | sw $s8, 32($a0) |
| 42 | sw $ra, 36($a0) |
| 43 | sw $sp, 40($a0) |
| 44 | |
| 45 | # load new state |
| 46 | lw $s0, 0($a1) |
| 47 | lw $s1, 4($a1) |
| 48 | lw $s2, 8($a1) |
| 49 | lw $s3, 12($a1) |
| 50 | lw $s4, 16($a1) |
| 51 | lw $s5, 20($a1) |
| 52 | lw $s6, 24($a1) |
| 53 | lw $s7, 28($a1) |
| 54 | lw $s8, 32($a1) |
| 55 | lw $ra, 36($a1) |
| 56 | lw $sp, 40($a1) |
| 57 | |
| 58 | jr $ra |
| 59 | nop |
| 60 | |