/* $NetBSD: sparc.c,v 1.12 2019/05/07 04:35:31 thorpej Exp $ */
/*-
* Copyright (c) 1998, 2002 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Paul Kranenburg and Luke Mewburn.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#if HAVE_NBTOOL_CONFIG_H
#include "nbtool_config.h"
#endif
#include <sys/cdefs.h>
#if !defined(__lint)
__RCSID("$NetBSD: sparc.c,v 1.12 2019/05/07 04:35:31 thorpej Exp $");
#endif /* !__lint */
#include <sys/param.h>
#include <assert.h>
#include <err.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "installboot.h"
static struct bbinfo_params bbparams = {
SPARC_BBINFO_MAGIC,
SPARC_BOOT_BLOCK_OFFSET,
SPARC_BOOT_BLOCK_BLOCKSIZE,
SPARC_BOOT_BLOCK_MAX_SIZE,
32, /* leave room for a.out header */
BBINFO_BIG_ENDIAN,
};
static int sparc_clearheader(ib_params *, struct bbinfo_params *, uint8_t *);
static int sparc_setheader(ib_params *, struct bbinfo_params *, uint8_t *);
static int sparc_clearboot(ib_params *);
static int sparc_setboot(ib_params *);
struct ib_mach ib_mach_sparc = {
.name = "sparc",
.setboot = sparc_setboot,
.clearboot = sparc_clearboot,
.editboot = no_editboot,
.valid_flags = IB_STAGE2START,
};
static int
sparc_clearboot(ib_params *params)
{
assert(params != NULL);
return (shared_bbinfo_clearboot(params, &bbparams, sparc_clearheader));
}
static int
sparc_setboot(ib_params *params)
{
assert(params != NULL);
return (shared_bbinfo_setboot(params, &bbparams, sparc_setheader));
}
static int
sparc_clearheader(ib_params *params, struct bbinfo_params *bb_params,
uint8_t *bb)
{
assert(params != NULL);
assert(bb_params != NULL);
assert(bb != NULL);
memset(bb, 0, bb_params->headeroffset);
return (1);
}
static int
sparc_setheader(ib_params *params, struct bbinfo_params *bb_params, uint8_t *bb)
{
assert(params != NULL);
assert(bb_params != NULL);
assert(bb != NULL);
/*
* sun4c/sun4m PROMs require an a.out(5) format header.
* Old-style sun4 PROMs do not expect a header at all.
* To deal with this, we construct a header that is also executable
* code containing a forward branch that gets us past the 32-byte
* header where the actual code begins. In assembly:
* .word MAGIC ! a NOP
* ba,a start !
* .skip 24 ! pad
* start:
*/
#define SUN_MAGIC 0x01030107
#define SUN4_BASTART 0x30800007 /* i.e.: ba,a `start' */
*((uint32_t *)bb) = htobe32(SUN_MAGIC);
*((uint32_t *)bb + 1) = htobe32(SUN4_BASTART);
return (1);
}
