NetBSD-5.0.2/usr.sbin/installboot/arch/next68k.c
/* $NetBSD: next68k.c,v 1.5 2008/04/28 20:24:16 martin Exp $ */
/*-
* Copyright (c) 2003 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by David Laight and Christian Limpach.
*
* 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: next68k.c,v 1.5 2008/04/28 20:24:16 martin Exp $");
#endif /* !__lint */
#include <sys/param.h>
#include <assert.h>
#include <err.h>
#include <md5.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "installboot.h"
#define SECTOR_SIZE DEV_BSIZE
static uint16_t nextstep_checksum(const void *, const void *);
static int next68k_setboot(ib_params *);
struct ib_mach ib_mach_next68k =
{ "next68k", next68k_setboot, no_clearboot, no_editboot, 0};
static uint16_t
nextstep_checksum(const void *vbuf, const void *vlimit)
{
const uint16_t *buf = vbuf;
const uint16_t *limit = vlimit;
u_int sum = 0;
while (buf < limit) {
sum += be16toh(*buf++);
}
sum += (sum >> 16);
return (sum & 0xffff);
}
static int
next68k_setboot(ib_params *params)
{
int retval, labelupdated;
uint8_t *bootbuf;
u_int bootsize;
ssize_t rv;
uint32_t cd_secsize;
int sec_netonb_mult;
struct next68k_disklabel *next68klabel;
uint16_t *checksum;
uint32_t fp, b0, b1;
assert(params != NULL);
assert(params->fsfd != -1);
assert(params->filesystem != NULL);
assert(params->s1fd != -1);
assert(params->stage1 != NULL);
retval = 0;
labelupdated = 0;
bootbuf = NULL;
next68klabel = malloc(NEXT68K_LABEL_SIZE);
if (next68klabel == NULL) {
warn("Allocating %lu bytes", (unsigned long)NEXT68K_LABEL_SIZE);
goto done;
}
/*
* Read in the next68k disklabel
*/
rv = pread(params->fsfd, next68klabel, NEXT68K_LABEL_SIZE,
NEXT68K_LABEL_SECTOR * SECTOR_SIZE + NEXT68K_LABEL_OFFSET);
if (rv == -1) {
warn("Reading `%s'", params->filesystem);
goto done;
}
if (rv != NEXT68K_LABEL_SIZE) {
warnx("Reading `%s': short read", params->filesystem);
goto done;
}
if (be32toh(next68klabel->cd_version) == NEXT68K_LABEL_CD_V3) {
checksum = &next68klabel->NEXT68K_LABEL_cd_v3_checksum;
} else {
checksum = &next68klabel->cd_checksum;
}
if (nextstep_checksum (next68klabel, checksum) !=
be16toh(*checksum)) {
warn("Disklabel checksum invalid on `%s'",
params->filesystem);
goto done;
}
cd_secsize = be32toh(next68klabel->cd_secsize);
sec_netonb_mult = (cd_secsize / SECTOR_SIZE);
/*
* Allocate a buffer, with space to round up the input file
* to the next block size boundary, and with space for the boot
* block.
*/
bootsize = roundup(params->s1stat.st_size, cd_secsize);
bootbuf = malloc(bootsize);
if (bootbuf == NULL) {
warn("Allocating %lu bytes", (unsigned long)bootsize);
goto done;
}
memset(bootbuf, 0, bootsize);
/*
* Read the file into the buffer.
*/
rv = pread(params->s1fd, bootbuf, params->s1stat.st_size, 0);
if (rv == -1) {
warn("Reading `%s'", params->stage1);
goto done;
} else if (rv != params->s1stat.st_size) {
warnx("Reading `%s': short read", params->stage1);
goto done;
}
if (bootsize > be16toh(next68klabel->cd_front) * cd_secsize -
NEXT68K_LABEL_SIZE) {
warnx("Boot program is larger than front porch space");
goto done;
}
fp = be16toh(next68klabel->cd_front);
b0 = be32toh(next68klabel->cd_boot_blkno[0]);
b1 = be32toh(next68klabel->cd_boot_blkno[1]);
if (b0 > fp)
b0 = fp;
if (b1 > fp)
b1 = fp;
if (((bootsize / cd_secsize) > b1 - b0) ||
((bootsize / cd_secsize) > fp - b1)) {
if (2 * bootsize > (fp * cd_secsize - NEXT68K_LABEL_SIZE))
/* can only fit one copy */
b0 = b1 = NEXT68K_LABEL_SIZE / cd_secsize;
else {
if (2 * bootsize > (fp * cd_secsize -
NEXT68K_LABEL_DEFAULTBOOT0_1 * SECTOR_SIZE))
/* can fit two copies starting after label */
b0 = NEXT68K_LABEL_SIZE / cd_secsize;
else
/* can fit two copies starting at default 1 */
b0 = NEXT68K_LABEL_DEFAULTBOOT0_1 /
sec_netonb_mult;
/* try to fit 2nd copy at default 2 */
b1 = NEXT68K_LABEL_DEFAULTBOOT0_2 / sec_netonb_mult;
if (fp < b1)
b1 = fp;
if (bootsize / cd_secsize > (fp - b1))
/* fit 2nd copy before front porch */
b1 = fp - bootsize / cd_secsize;
}
}
if (next68klabel->cd_boot_blkno[0] != htobe32(b0)) {
next68klabel->cd_boot_blkno[0] = htobe32(b0);
labelupdated = 1;
}
if (next68klabel->cd_boot_blkno[1] != htobe32(b1)) {
next68klabel->cd_boot_blkno[1] = htobe32(b1);
labelupdated = 1;
}
if (params->flags & IB_VERBOSE)
printf("Boot programm locations%s: %d %d\n",
labelupdated ? " updated" : "", b0 * sec_netonb_mult,
b1 * sec_netonb_mult);
if (params->flags & IB_NOWRITE) {
retval = 1;
goto done;
}
/*
* Write the updated next68k disklabel
*/
if (labelupdated) {
if (params->flags & IB_VERBOSE)
printf ("Writing updated label\n");
*checksum = htobe16(nextstep_checksum (next68klabel,
checksum));
rv = pwrite(params->fsfd, next68klabel, NEXT68K_LABEL_SIZE,
NEXT68K_LABEL_SECTOR * SECTOR_SIZE + NEXT68K_LABEL_OFFSET);
if (rv == -1) {
warn("Writing `%s'", params->filesystem);
goto done;
}
if (rv != NEXT68K_LABEL_SIZE) {
warnx("Writing `%s': short write", params->filesystem);
goto done;
}
}
b0 *= sec_netonb_mult;
b1 *= sec_netonb_mult;
/*
* Write boot program to locations b0 and b1 (if different).
*/
for (;;) {
if (params->flags & IB_VERBOSE)
printf ("Writing boot program at %d\n", b0);
rv = pwrite(params->fsfd, bootbuf, bootsize, b0 * SECTOR_SIZE);
if (rv == -1) {
warn("Writing `%s' at %d", params->filesystem, b0);
goto done;
}
if (rv != bootsize) {
warnx("Writing `%s' at %d: short write",
params->filesystem, b0);
goto done;
}
if (b0 == b1)
break;
b0 = b1;
}
retval = 1;
done:
if (bootbuf)
free(bootbuf);
if (next68klabel)
free(next68klabel);
return retval;
}