diff options
Diffstat (limited to 'rbutil/mks5lboot/dualboot/init.S')
-rw-r--r-- | rbutil/mks5lboot/dualboot/init.S | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/rbutil/mks5lboot/dualboot/init.S b/rbutil/mks5lboot/dualboot/init.S new file mode 100644 index 0000000000..bd049515f4 --- /dev/null +++ b/rbutil/mks5lboot/dualboot/init.S @@ -0,0 +1,43 @@ +/*************************************************************************** + * __________ __ ___. + * Open \______ \ ____ ____ | | _\_ |__ _______ ___ + * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / + * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < + * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ + * \/ \/ \/ \/ \/ + * $Id: + * + * Copyright © 2009 Michael Sparmann + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY + * KIND, either express or implied. + * + ****************************************************************************/ + + .section .init.text, "ax", %progbits + .global _start + +_start: + mov r0, #0xD7 + msr CPSR_c, r0 @ Abort mode, IRQs/FIQs disabled + ldr sp, =_exception_stack + + mov r0, #0xDB + msr CPSR_c, r0 @ Undefined Instruction mode, IRQs/FIQs disabled + ldr sp, =_exception_stack + + mov r0, #0xD3 + msr CPSR_c, r0 @ Supervisor mode, IRQs/FIQs disabled + ldr sp, =_supervisor_stack + + MOV R0, #0x00050000 + ORR R0, #0x00000078 + MCR p15, 0, R0, c1, c0, 0 @ Get rid of some CPU "features" likely to cause trouble + + bl main + .ltorg |