root/sys/arch/ia64/stand/ia64/ski/start.S
/*      $NetBSD: start.S,v 1.2 2006/04/22 07:58:53 cherry Exp $ */
        
/*-
 * 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: src/sys/boot/ia64/skiload/start.S,v 1.1 2003/07/17 01:49:59 marcel Exp $
 */

#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