start.S revision 117677 
1/*
2 * Copyright (c) 2003 Marcel Moolenaar
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 *
26 * $FreeBSD: head/sys/boot/ia64/ski/start.S 117677 2003-07-17 01:49:59Z marcel $
27 */
28
29#include <machine/fpu.h>
30
31#define	STACKSIZE	16384
32#define	FPSR_DEFAULT	0x0009804c0270033f
33
34	.text
35	.global		_start
36	.proc		_start
37_start:
38{	.mlx
39	mov		ar.rsc=0
40	movl		gp=__gp
41	;;
42}
43{	.mlx
44	add		r2=@gprel(stack),gp
45	movl		r14=FPSR_DEFAULT
46	;;
47}
48{	.mib
49	mov		ar.bspstore=r2
50	add		r12=STACKSIZE-16,r2
51	bsw.1
52	;;
53}
54{	.mmb
55	mov		ar.rsc=3
56	mov		ar.fpsr=r14
57	br.sptk		ski_main
58	;;
59}
60	.endp		_start
61
62	.data
63	.align		16
64stack:	.skip		STACKSIZE
65