Home | History | Annotate | Line # | Download | only in bootxx_ffs 
      1 /*	$NetBSD: startit.s,v 1.3 2009/11/15 20:38:36 snj Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1996 Ignatios Souvatzis
      5  * Copyright (c) 1994 Michael L. Hitch
      6  * All rights reserved.
      7  *
      8  * Redistribution and use in source and binary forms, with or without
      9  * modification, are permitted provided that the following conditions
     10  * are met:
     11  * 1. Redistributions of source code must retain the above copyright
     12  *    notice, this list of conditions and the following disclaimer.
     13  * 2. Redistributions in binary form must reproduce the above copyright
     14  *    notice, this list of conditions and the following disclaimer in the
     15  *    documentation and/or other materials provided with the distribution.
     16  *
     17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     27  *
     28  *
     29  * From: $NetBSD: startit.s,v 1.3 2009/11/15 20:38:36 snj Exp $
     30  */
     31 #include "machine/asm.h"
     32 
     33 	.set	ABSEXECBASE,4
     34 
     35 	.text
     36 
     37 ENTRY_NOPROFILE(startit)
     38 	movel	4:w,%a6			| SysBase
     39 	movel	%sp@(4),%a0		| Boot loader address
     40 	movel	%sp@(8),%a1		| IOR
     41 	movel	%sp@(12),%a5		| Console data
     42 /*
     43  * Installboot can modify the default command in the bootblock loader,
     44  * but boot.amiga uses the default command in boot.amiga.  Copy the
     45  * possibly modified default command before entering the boot loader.
     46  */
     47 	lea	%pc@(_C_LABEL(default_command)),%a2
     48 	lea	%a0@(16),%a3
     49 	moveq	#(32/4)-1,%d0
     50 Lcommand:
     51 	movel	%a2@+,%a3@+
     52 	dbra	%d0,Lcommand
     53 
     54 	jsr	%a0@(12)
     55 	rts
     56