/*************************************************************************** * __________ __ ___. * Open \______ \ ____ ____ | | _\_ |__ _______ ___ * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ * \/ \/ \/ \/ \/ * $Id$ * * Copyright (C) 2005 by Jens Arnold * based on crt0.S by Linus Nielsen Feltzing * * 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 .start,"ax",@progbits .global _start _start: /* copy the .iram section */ mov.l .iramcopy_k,r0 mov.l .iram_k,r1 mov.l .iramend_k,r2 /* Note: We cannot put a PC relative load into the delay slot of a 'bra' instruction (the offset would be wrong), but there is nothing else to do before the loop, so the delay slot would be 'nop'. The cmp / bf sequence is the same length, but more efficient. */ cmp/hi r1,r2 bf .noiramcopy .iramloop: mov.l @r0+,r3 mov.l r3,@r1 add #4,r1 cmp/hi r1,r2 bt .iramloop .noiramcopy: /* call the mainline */ mov.l .main_k,r0 mov.l .stackend_k,r15 jmp @r0 nop .align 2 .iramcopy_k: .long _iramcopy .iram_k: .long _iramstart .iramend_k: .long _iramend .stackend_k: .long _stackend .main_k: .long _main