arm_init.S revision 183651 
1/*-
2 * Copyright (c) 2008 John Hay.  All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 *    notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
14 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
15 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
16 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
17 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
18 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
19 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
20 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
21 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
22 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
23 *
24 * $FreeBSD: head/sys/boot/arm/ixp425/boot2/arm_init.S 183651 2008-10-06 19:38:10Z jhay $
25 */
26
27start:
28
29/* Initialise bss and sp */
30	nop
31	adr	r1, .Lstart
32	ldmia	r1, {r1, r2, sp}	/* Set initial stack and */
33	sub	r2, r2, r1		/* get zero init data */
34	mov	r3, #0
35.L1:
36	str	r3, [r1], #0x0004	/* get zero init data */
37	subs	r2, r2, #4
38	bgt	.L1
39
40	.extern	main
41	bl	main
42/* main should not return.  If it does, spin forever		*/
43infiniteLoop:
44	b	infiniteLoop
45
46.Lstart:
47	.word	_edata
48	.word	_end
49	.word	BOOT_STACK
50/* End */
51