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@sharism.cc> |
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 | |