1 /* $NetBSD: sparc.c,v 1.11 2008/04/28 20:24:16 martin Exp $ */
4 * Copyright (c) 1998, 2002 The NetBSD Foundation, Inc.
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Paul Kranenburg and Luke Mewburn.
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.
32 #if HAVE_NBTOOL_CONFIG_H
33 #include "nbtool_config.h"
36 #include <sys/cdefs.h>
38 __RCSID("$NetBSD: sparc.c,v 1.11 2008/04/28 20:24:16 martin Exp $");
41 #include <sys/param.h>
51 #include "installboot.h"
53 static struct bbinfo_params bbparams
= {
55 SPARC_BOOT_BLOCK_OFFSET
,
56 SPARC_BOOT_BLOCK_BLOCKSIZE
,
57 SPARC_BOOT_BLOCK_MAX_SIZE
,
58 32, /* leave room for a.out header */
62 static int sparc_clearheader(ib_params
*, struct bbinfo_params
*, uint8_t *);
63 static int sparc_setheader(ib_params
*, struct bbinfo_params
*, uint8_t *);
65 static int sparc_clearboot(ib_params
*);
66 static int sparc_setboot(ib_params
*);
68 struct ib_mach ib_mach_sparc
=
69 { "sparc", sparc_setboot
, sparc_clearboot
, no_editboot
,
73 sparc_clearboot(ib_params
*params
)
76 assert(params
!= NULL
);
78 return (shared_bbinfo_clearboot(params
, &bbparams
, sparc_clearheader
));
82 sparc_setboot(ib_params
*params
)
84 assert(params
!= NULL
);
86 return (shared_bbinfo_setboot(params
, &bbparams
, sparc_setheader
));
91 sparc_clearheader(ib_params
*params
, struct bbinfo_params
*bb_params
,
95 assert(params
!= NULL
);
96 assert(bb_params
!= NULL
);
99 memset(bb
, 0, bb_params
->headeroffset
);
104 sparc_setheader(ib_params
*params
, struct bbinfo_params
*bb_params
, uint8_t *bb
)
107 assert(params
!= NULL
);
108 assert(bb_params
!= NULL
);
112 * sun4c/sun4m PROMs require an a.out(5) format header.
113 * Old-style sun4 PROMs do not expect a header at all.
114 * To deal with this, we construct a header that is also executable
115 * code containing a forward branch that gets us past the 32-byte
116 * header where the actual code begins. In assembly:
117 * .word MAGIC ! a NOP
122 #define SUN_MAGIC 0x01030107
123 #define SUN4_BASTART 0x30800007 /* i.e.: ba,a `start' */
124 *((uint32_t *)bb
) = htobe32(SUN_MAGIC
);
125 *((uint32_t *)bb
+ 1) = htobe32(SUN4_BASTART
);