1 | /* |
2 | * Copyright (C) 2009 Qi Hardware Inc., |
3 | * Author: Xiangfu Liu <xiangfu@sharism.cc> |
4 | * |
5 | * This program is free software; you can redistribute it and/or |
6 | * modify it under the terms of the GNU General Public License |
7 | * version 3 as published by the Free Software Foundation. |
8 | * |
9 | * This program is distributed in the hope that it will be useful, |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
12 | * GNU General Public License for more details. |
13 | * |
14 | * You should have received a copy of the GNU General Public License |
15 | * along with this program; if not, write to the Free Software |
16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, |
17 | * Boston, MA 02110-1301, USA |
18 | */ |
19 | #include "usb_boot_defines.h" |
20 | |
21 | extern void usb_main(); |
22 | extern unsigned int UART_BASE; |
23 | struct fw_args *fw_args; |
24 | unsigned int start_addr, got_start, got_end; |
25 | |
26 | void c_main(void) |
27 | { |
28 | volatile unsigned int addr,offset; |
29 | /* get absolute start address */ |
30 | __asm__ __volatile__( |
31 | "move %0, $20\n\t" |
32 | : "=r"(start_addr) |
33 | : |
34 | ); |
35 | |
36 | /* get related GOT address */ |
37 | __asm__ __volatile__( |
38 | "la $4, _GLOBAL_OFFSET_TABLE_\n\t" |
39 | "move %0, $4\n\t" |
40 | "la $5, _got_end\n\t" |
41 | "move %1, $5\n\t" |
42 | : "=r"(got_start),"=r"(got_end) |
43 | : |
44 | ); |
45 | |
46 | /* calculate offset and correct GOT*/ |
47 | offset = start_addr - 0x80000000; |
48 | got_start += offset; |
49 | got_end += offset; |
50 | /* add offset to correct all GOT */ |
51 | for(addr = got_start + 8; addr < got_end; addr += 4) |
52 | *((volatile unsigned int *)(addr)) += offset; |
53 | |
54 | /* get the fw args from memory */ |
55 | fw_args = (struct fw_args *)(start_addr + 0x8); |
56 | |
57 | extern struct hand Hand; |
58 | Hand.fw_args.cpu_id = fw_args->cpu_id; |
59 | |
60 | UART_BASE = 0xB0030000 + fw_args->use_uart * 0x1000; |
61 | |
62 | serial_puts("\n Stage2 start address is :\t"); |
63 | serial_put_hex(start_addr); |
64 | serial_puts("\n Address offset is:\t"); |
65 | serial_put_hex(offset); |
66 | serial_puts("\n GOT correct to :\t"); |
67 | serial_put_hex(got_start); |
68 | |
69 | usb_main(); |
70 | } |
71 | |