129 lines
3.7 KiB
C
129 lines
3.7 KiB
C
/* $NetBSD: sparc.c,v 1.11 2008/04/28 20:24:16 martin Exp $ */
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/*-
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* Copyright (c) 1998, 2002 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Paul Kranenburg and Luke Mewburn.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#if HAVE_NBTOOL_CONFIG_H
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#include "nbtool_config.h"
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#endif
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#include <sys/cdefs.h>
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#if !defined(__lint)
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__RCSID("$NetBSD: sparc.c,v 1.11 2008/04/28 20:24:16 martin Exp $");
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#endif /* !__lint */
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#include <sys/param.h>
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#include <assert.h>
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#include <err.h>
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#include <stddef.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include "installboot.h"
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static struct bbinfo_params bbparams = {
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SPARC_BBINFO_MAGIC,
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SPARC_BOOT_BLOCK_OFFSET,
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SPARC_BOOT_BLOCK_BLOCKSIZE,
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SPARC_BOOT_BLOCK_MAX_SIZE,
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32, /* leave room for a.out header */
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BBINFO_BIG_ENDIAN,
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};
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static int sparc_clearheader(ib_params *, struct bbinfo_params *, uint8_t *);
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static int sparc_setheader(ib_params *, struct bbinfo_params *, uint8_t *);
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static int sparc_clearboot(ib_params *);
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static int sparc_setboot(ib_params *);
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struct ib_mach ib_mach_sparc =
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{ "sparc", sparc_setboot, sparc_clearboot, no_editboot,
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IB_STAGE2START };
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static int
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sparc_clearboot(ib_params *params)
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{
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assert(params != NULL);
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return (shared_bbinfo_clearboot(params, &bbparams, sparc_clearheader));
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}
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static int
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sparc_setboot(ib_params *params)
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{
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assert(params != NULL);
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return (shared_bbinfo_setboot(params, &bbparams, sparc_setheader));
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}
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static int
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sparc_clearheader(ib_params *params, struct bbinfo_params *bb_params,
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uint8_t *bb)
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{
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assert(params != NULL);
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assert(bb_params != NULL);
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assert(bb != NULL);
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memset(bb, 0, bb_params->headeroffset);
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return (1);
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}
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static int
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sparc_setheader(ib_params *params, struct bbinfo_params *bb_params, uint8_t *bb)
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{
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assert(params != NULL);
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assert(bb_params != NULL);
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assert(bb != NULL);
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/*
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* sun4c/sun4m PROMs require an a.out(5) format header.
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* Old-style sun4 PROMs do not expect a header at all.
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* To deal with this, we construct a header that is also executable
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* code containing a forward branch that gets us past the 32-byte
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* header where the actual code begins. In assembly:
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* .word MAGIC ! a NOP
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* ba,a start !
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* .skip 24 ! pad
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* start:
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*/
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#define SUN_MAGIC 0x01030107
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#define SUN4_BASTART 0x30800007 /* i.e.: ba,a `start' */
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*((uint32_t *)bb) = htobe32(SUN_MAGIC);
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*((uint32_t *)bb + 1) = htobe32(SUN4_BASTART);
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return (1);
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}
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