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/***************************************************************************
* __________ __ ___.
* 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
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