1 /* $NetBSD: start.S,v 1.19 2006/02/07 11:59:22 simonb Exp $ */
4 * Copyright (c) 1999 The NetBSD Foundation, Inc.
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Jonathan Stone, Michael Hitch and Simon Burge.
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
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.
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.
33 * Copyright (c) 1992, 1993
34 * The Regents of the University of California. All rights reserved.
36 * This code is derived from software contributed to Berkeley by
39 * Redistribution and use in source and binary forms, with or without
40 * modification, are permitted provided that the following conditions
42 * 1. Redistributions of source code must retain the above copyright
43 * notice, this list of conditions and the following disclaimer.
44 * 2. Redistributions in binary form must reproduce the above copyright
45 * notice, this list of conditions and the following disclaimer in the
46 * documentation and/or other materials provided with the distribution.
47 * 3. Neither the name of the University nor the names of its contributors
48 * may be used to endorse or promote products derived from this software
49 * without specific prior written permission.
51 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
52 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
53 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
54 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
55 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
56 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
57 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
58 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
59 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
60 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
63 * @(#)start.s 8.2 (Berkeley) 1/21/94
69 * Contains code that is the first executed at boot time.
71 * Copyright (C) 1989 Digital Equipment Corporation.
72 * Permission to use, copy, modify, and distribute this software and
73 * its documentation for any purpose and without fee is hereby granted,
74 * provided that the above copyright notice appears in all copies.
75 * Digital Equipment Corporation makes no representations about the
76 * suitability of this software for any purpose. It is provided "as is"
77 * without express or implied warranty.
79 * from: Header: /sprite/src/boot/decprom/ds3100.md/RCS/start.s,
80 * v 1.1 90/02/16 16:19:39 shirriff Exp SPRITE (DECWRL)
84 #include <mips/cpuregs.h>
85 #include <machine/dec_prom.h>
95 la sp, start - CALLFRAME_SIZ
96 sw zero, CALLFRAME_RA(sp) # Zero out old ra for debugger
97 sw zero, CALLFRAME_SP(sp) # Zero out old fp for debugger
98 move s0, a0 # save argc
99 move s1, a1 # save argv
100 beq a2, DEC_REX_MAGIC, 1f # jump if boot from DS5000
101 move s3, a3 # BDslot: save call vector
102 la s3, _C_LABEL(callvec) # init call vector
104 la a0, _C_LABEL (edata) # clear BSS
106 la a2, _C_LABEL (end)
107 jal _C_LABEL(memset) # memset(edata, 0, end - edata)
109 sw s3, _C_LABEL(callv) # save call vector
110 move a0, s0 # restore argc
111 jal _C_LABEL(main) # main(argc, argv)
112 move a1, s1 # restore argv
113 j _C_LABEL(prom_restart) # restart...
118 lw v0, _C_LABEL (callv)
119 lw v0, 0x9C(v0) /* halt */
120 move a0, zero /* Don't print anything. */
131 #ifndef LIBSA_NO_DEV_CLOSE
133 li v0, DEC_PROM_CLOSE
140 li v0, DEC_PROM_LSEEK
152 li v0, DEC_PROM_WRITE