1/*	$NetBSD: start.S,v 1.2 2002/11/16 08:55:05 wdk Exp $	*/
2
3/*
4 * Copyright (c) 2000 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Wayne Knowles
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32#include <mips/asm.h>
33#include <mips/cpuregs.h>
34#include <machine/prom.h>
35
36LEAF(start)
37	.set	noreorder
38#ifdef __GP_SUPPORT__
39	la      gp, _C_LABEL (_gp)
40#endif
41	la	sp, start - CALLFRAME_SIZ
42	sw	zero, CALLFRAME_RA(sp)		# clear ra for debugger
43	sw	zero, CALLFRAME_SP(sp)		# clear fp for debugger
44	move	s0, a0				# save argc
45	move	s1, a1				# save argv
46
47	la	a0, _C_LABEL (edata)		# clear BSS
48	move	a1, zero
49	la	a2, _C_LABEL (end)
50	jal	_C_LABEL(memset)		# memset(edata, 0, end - edata)
51	subu	a2, a2, a0
52
53	move	a0, s0				# restore argc
54	jal	_C_LABEL(main)			# main(argc, argv)
55	move	a1, s1				# restore argv
56
57XLEAF(_rtt)
58	la	t9, _C_LABEL(prom_restart)		# restart...
59	j	t9
60	move	a0, zero
61END(start)
62