| 1 | /* |
| 2 | * head.S |
| 3 | * |
| 4 | * Entry point of the firmware. |
| 5 | * The firmware code are executed in the ICache. |
| 6 | * |
| 7 | * Copyright 2009 (C) Qi Hardware Inc., |
| 8 | * Author: Xiangfu Liu <xiangfu@qi-hardware.com> |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or |
| 11 | * modify it under the terms of the GNU General Public License |
| 12 | * version 3 as published by the Free Software Foundation. |
| 13 | * |
| 14 | * This program is distributed in the hope that it will be useful, |
| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 17 | * GNU General Public License for more details. |
| 18 | * |
| 19 | * You should have received a copy of the GNU General Public License |
| 20 | * along with this program; if not, write to the Free Software |
| 21 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, |
| 22 | * Boston, MA 02110-1301, USA |
| 23 | */ |
| 24 | |
| 25 | .text |
| 26 | |
| 27 | .extern c_main |
| 28 | |
| 29 | .globl _start |
| 30 | .set noreorder |
| 31 | _start: |
| 32 | b real_start |
| 33 | nop |
| 34 | .word 0x0 /* address: 0x80002008 */ |
| 35 | .word 0x0 |
| 36 | .word 0x0 |
| 37 | .word 0x0 |
| 38 | .word 0x0 |
| 39 | .word 0x0 |
| 40 | .word 0x0 |
| 41 | .word 0x0 |
| 42 | /* reserve 8 words for args |
| 43 | * this is must big then sizeof(sturct fw_args) |
| 44 | */ |
| 45 | real_start: |
| 46 | /* |
| 47 | * setup stack, jump to C code |
| 48 | */ |
| 49 | la $29, 0x80004000 /* sp */ |
| 50 | j c_main |
| 51 | nop |
| 52 | |
| 53 | .set reorder |
| 54 | |
