xref: /src/usr.sbin/installboot/arch/sparc64.c

/*	$NetBSD: sparc64.c,v 1.5 2002/04/11 07:56:14 lukem Exp $	*/

/*-
 * Copyright (c) 2002 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Luke Mewburn of Wasabi Systems.
 *
 * 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.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the NetBSD
 *	Foundation, Inc. and its contributors.
 * 4. Neither the name of The NetBSD Foundation nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * 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.
 */

/*
 * Copyright (c) 2002 Matthew R. Green
 * All rights reserved.
 *
 * 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.
 * 3. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
 */

#include <sys/cdefs.h>
#if defined(__RCSID) && !defined(__lint)
__RCSID("$NetBSD: sparc64.c,v 1.5 2002/04/11 07:56:14 lukem Exp $");
#endif	/* !__lint */

#include <sys/param.h>
#include <sys/stat.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"

int	sparc64_setboot(ib_params *);
int	sparc64_clearboot(ib_params *);

#define SPARC64_BOOT_BLOCK_OFFSET	DEV_BSIZE
#define SPARC64_BOOT_BLOCK_BLOCKSIZE	DEV_BSIZE
#define SPARC64_BOOT_BLOCK_MAX_SIZE	(DEV_BSIZE * 15)

int
sparc64_clearboot(ib_params *params)
{
	char	bb[SPARC64_BOOT_BLOCK_MAX_SIZE];
	ssize_t	rv;

	assert(params != NULL);
	assert(params->fsfd != -1);
	assert(params->filesystem != NULL);

	if (params->flags & IB_STARTBLOCK) {
		warnx("Can't use `-b bno' with `-c'");
		return (0);
	}
	/* first check that it _could_ exist here */
	rv = pread(params->fsfd, &bb, sizeof bb, SPARC64_BOOT_BLOCK_OFFSET);
	if (rv == -1) {
		warn("Reading `%s'", params->filesystem);
		return (0);
	} else if (rv != sizeof bb) {
		warnx("Reading `%s': short read", params->filesystem);
		return (0);
	}

	/* now clear it out to nothing */
	memset(&bb, 0, sizeof bb);

	if (params->flags & IB_VERBOSE)
		printf("%slearing boot block\n",
		    (params->flags & IB_NOWRITE) ? "Not c" : "C");
	if (params->flags & IB_NOWRITE)
		return (1);

	rv = pwrite(params->fsfd, &bb, sizeof(bb), SPARC64_BOOT_BLOCK_OFFSET);
	if (rv == -1) {
		warn("Writing `%s'", params->filesystem);
		return (0);
	} else if (rv != sizeof(bb)) {
		warnx("Writing `%s': short write", params->filesystem);
		return (0);
	}

	return (1);
}

int
sparc64_setboot(ib_params *params)
{
	struct stat	bootstrapsb;
	char		bb[SPARC64_BOOT_BLOCK_MAX_SIZE];
	int		startblock, retval;
	ssize_t		rv;

	assert(params != NULL);
	assert(params->fsfd != -1);
	assert(params->filesystem != NULL);
	assert(params->bbfd != -1);
	assert(params->bootblock != NULL);

	retval = 0;

	if (fstat(params->bbfd, &bootstrapsb) == -1) {
		warn("Examining `%s'", params->bootblock);
		goto done;
	}
	if (!S_ISREG(bootstrapsb.st_mode)) {
		warnx("`%s' must be a regular file", params->bootblock);
		goto done;
	}

	memset(&bb, 0, SPARC64_BOOT_BLOCK_MAX_SIZE);
	rv = read(params->bbfd, &bb, sizeof bb);
	if (rv == -1) {
		warn("Reading `%s'", params->filesystem);
		goto done;
	}

	if (params->flags & IB_STARTBLOCK)
		startblock = params->startblock;
	else
		startblock = SPARC64_BOOT_BLOCK_OFFSET /
		    SPARC64_BOOT_BLOCK_BLOCKSIZE;

	if (params->flags & IB_VERBOSE) {
		printf("Bootstrap start sector: %#x\n", startblock);
		printf("Bootstrap byte count:   %#x\n", (unsigned)rv);
		printf("%sriting bootstrap\n",
		    (params->flags & IB_NOWRITE) ? "Not w" : "W");
	}
	if (params->flags & IB_NOWRITE) {
		retval = 1;
		goto done;
	}

	rv = pwrite(params->fsfd, &bb, SPARC64_BOOT_BLOCK_MAX_SIZE,
	    startblock * SPARC64_BOOT_BLOCK_BLOCKSIZE);
	if (rv == -1) {
		warn("Writing `%s'", params->filesystem);
		goto done;
	} else if (rv != SPARC64_BOOT_BLOCK_MAX_SIZE) {
		warnx("Writing `%s': short write", params->filesystem);
		goto done;
	} else
		retval = 1;

 done:
	return (retval);
}