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startit.s revision 1.3 
      1  1.3     snj /*	$NetBSD: startit.s,v 1.3 2009/11/15 20:38:36 snj Exp $	*/
      2  1.1  mhitch 
      3  1.1  mhitch /*
      4  1.1  mhitch  * Copyright (c) 1996 Ignatios Souvatzis
      5  1.1  mhitch  * Copyright (c) 1994 Michael L. Hitch
      6  1.1  mhitch  * All rights reserved.
      7  1.1  mhitch  *
      8  1.1  mhitch  * Redistribution and use in source and binary forms, with or without
      9  1.1  mhitch  * modification, are permitted provided that the following conditions
     10  1.1  mhitch  * are met:
     11  1.1  mhitch  * 1. Redistributions of source code must retain the above copyright
     12  1.1  mhitch  *    notice, this list of conditions and the following disclaimer.
     13  1.1  mhitch  * 2. Redistributions in binary form must reproduce the above copyright
     14  1.1  mhitch  *    notice, this list of conditions and the following disclaimer in the
     15  1.1  mhitch  *    documentation and/or other materials provided with the distribution.
     16  1.1  mhitch  *
     17  1.1  mhitch  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     18  1.1  mhitch  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     19  1.1  mhitch  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     20  1.1  mhitch  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     21  1.1  mhitch  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     22  1.1  mhitch  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     23  1.1  mhitch  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     24  1.1  mhitch  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     25  1.1  mhitch  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     26  1.1  mhitch  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     27  1.1  mhitch  *
     28  1.1  mhitch  *
     29  1.3     snj  * From: $NetBSD: startit.s,v 1.3 2009/11/15 20:38:36 snj Exp $
     30  1.1  mhitch  */
     31  1.1  mhitch #include "machine/asm.h"
     32  1.1  mhitch 
     33  1.1  mhitch 	.set	ABSEXECBASE,4
     34  1.1  mhitch 
     35  1.1  mhitch 	.text
     36  1.1  mhitch 
     37  1.1  mhitch ENTRY_NOPROFILE(startit)
     38  1.1  mhitch 	movel	4:w,%a6			| SysBase
     39  1.1  mhitch 	movel	%sp@(4),%a0		| Boot loader address
     40  1.1  mhitch 	movel	%sp@(8),%a1		| IOR
     41  1.1  mhitch 	movel	%sp@(12),%a5		| Console data
     42  1.2  mhitch /*
     43  1.2  mhitch  * Installboot can modify the default command in the bootblock loader,
     44  1.2  mhitch  * but boot.amiga uses the default command in boot.amiga.  Copy the
     45  1.2  mhitch  * possibly modified default command before entering the boot loader.
     46  1.2  mhitch  */
     47  1.2  mhitch 	lea	%pc@(_C_LABEL(default_command)),%a2
     48  1.2  mhitch 	lea	%a0@(16),%a3
     49  1.2  mhitch 	moveq	#(32/4)-1,%d0
     50  1.2  mhitch Lcommand:
     51  1.2  mhitch 	movel	%a2@+,%a3@+
     52  1.2  mhitch 	dbra	%d0,Lcommand
     53  1.2  mhitch 
     54  1.1  mhitch 	jsr	%a0@(12)
     55  1.1  mhitch 	rts
     56