| 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 | .section ".text.boot" |
| 26 | FUNCTION(_start) |
| 27 | # set the default stack |
| 28 | la $sp, default_stack_top |
| 29 | |
| 30 | # zero out the bss section |
| 31 | la $t0, __bss_start |
| 32 | la $t1, __bss_end |
| 33 | 0: |
| 34 | sw $zero, ($t0) |
| 35 | addi $t0, 4 |
| 36 | bne $t0, $t1, 0b |
| 37 | |
| 38 | # args to main and call it |
| 39 | li $a0, 1 |
| 40 | li $a1, 2 |
| 41 | li $a2, 3 |
| 42 | li $a3, 4 |
| 43 | jal lk_main |
| 44 | |
| 45 | # should never return here |
| 46 | b . |
| 47 | |
| 48 | .bss |
| 49 | .align 3 |
| 50 | LOCAL_DATA(default_stack) |
| 51 | .skip 4096 |
| 52 | LOCAL_DATA(default_stack_top) |
| 53 | |