xref: /freebsd-10.2-release/sys/boot/ia64/ski/start.S

/*-
 * Copyright (c) 2003 Marcel Moolenaar
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * $FreeBSD: head/sys/boot/ia64/ski/start.S 139738 2005-01-05 22:16:58Z imp $
 */

#define	STACKSIZE	16384
#define	FPSR_DEFAULT	0x0009804c0270033f

	.text
	.global		_start
	.proc		_start
_start:
{	.mlx
	mov		ar.rsc=0
	movl		gp=__gp
	;;
}
{	.mlx
	add		r2=@gprel(stack),gp
	movl		r14=FPSR_DEFAULT
	;;
}
{	.mib
	mov		ar.bspstore=r2
	add		r12=STACKSIZE-16,r2
	bsw.1
	;;
}
{	.mmb
	mov		ar.rsc=3
	mov		ar.fpsr=r14
	br.sptk		ski_main
	;;
}
	.endp		_start

	.data
	.align		16
stack:	.skip		STACKSIZE