diff options
Diffstat (limited to 'utils/mks5lboot/dualboot/init.S')
-rw-r--r-- | utils/mks5lboot/dualboot/init.S | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/utils/mks5lboot/dualboot/init.S b/utils/mks5lboot/dualboot/init.S new file mode 100644 index 0000000000..bd049515f4 --- /dev/null +++ b/utils/mks5lboot/dualboot/init.S | |||
@@ -0,0 +1,43 @@ | |||
1 | /*************************************************************************** | ||
2 | * __________ __ ___. | ||
3 | * Open \______ \ ____ ____ | | _\_ |__ _______ ___ | ||
4 | * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / | ||
5 | * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < | ||
6 | * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ | ||
7 | * \/ \/ \/ \/ \/ | ||
8 | * $Id: | ||
9 | * | ||
10 | * Copyright © 2009 Michael Sparmann | ||
11 | * | ||
12 | * This program is free software; you can redistribute it and/or | ||
13 | * modify it under the terms of the GNU General Public License | ||
14 | * as published by the Free Software Foundation; either version 2 | ||
15 | * of the License, or (at your option) any later version. | ||
16 | * | ||
17 | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY | ||
18 | * KIND, either express or implied. | ||
19 | * | ||
20 | ****************************************************************************/ | ||
21 | |||
22 | .section .init.text, "ax", %progbits | ||
23 | .global _start | ||
24 | |||
25 | _start: | ||
26 | mov r0, #0xD7 | ||
27 | msr CPSR_c, r0 @ Abort mode, IRQs/FIQs disabled | ||
28 | ldr sp, =_exception_stack | ||
29 | |||
30 | mov r0, #0xDB | ||
31 | msr CPSR_c, r0 @ Undefined Instruction mode, IRQs/FIQs disabled | ||
32 | ldr sp, =_exception_stack | ||
33 | |||
34 | mov r0, #0xD3 | ||
35 | msr CPSR_c, r0 @ Supervisor mode, IRQs/FIQs disabled | ||
36 | ldr sp, =_supervisor_stack | ||
37 | |||
38 | MOV R0, #0x00050000 | ||
39 | ORR R0, #0x00000078 | ||
40 | MCR p15, 0, R0, c1, c0, 0 @ Get rid of some CPU "features" likely to cause trouble | ||
41 | |||
42 | bl main | ||
43 | .ltorg | ||