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
37ENTRY_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
50Lcommand:
51          movel     %a2@+,%a3@+
52          dbra      %d0,Lcommand
53
54          jsr       %a0@(12)
55          rts
56