NetBSD-5.0.2/distrib/utils/sysinst/arch/acorn26/md.c
/* $NetBSD: md.c,v 1.22 2008/10/07 09:58:14 abs Exp $ */
/*
* Copyright 1997 Piermont Information Systems Inc.
* All rights reserved.
*
* Based on code written by Philip A. Nelson for Piermont Information
* Systems Inc.
*
* 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 for the NetBSD Project by
* Piermont Information Systems Inc.
* 4. The name of Piermont Information Systems Inc. may not be used to endorse
* or promote products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY PIERMONT INFORMATION SYSTEMS INC. ``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 PIERMONT INFORMATION SYSTEMS INC. 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.
*
*/
/* md.c -- acorn26 machine specific routines */
#include <stdio.h>
#include <curses.h>
#include <unistd.h>
#include <fcntl.h>
#include <util.h>
#include <sys/types.h>
#include <sys/disklabel.h>
#include <sys/disklabel_acorn.h>
#include <sys/ioctl.h>
#include <sys/param.h>
#include "defs.h"
#include "md.h"
#include "msg_defs.h"
#include "menu_defs.h"
void backtowin(void);
static int
filecore_checksum(u_char *bootblock);
/*
* static int filecore_checksum(u_char *bootblock)
*
* Calculates the filecore boot block checksum. This is used to validate
* a filecore boot block on the disk. If a boot block is validated then
* it is used to locate the partition table. If the boot block is not
* validated, it is assumed that the whole disk is NetBSD.
*
* The basic algorithm is:
*
* for (each byte in block, excluding checksum) {
* sum += byte;
* if (sum > 255)
* sum -= 255;
* }
*
* That's equivalent to summing all of the bytes in the block
* (excluding the checksum byte, of course), then calculating the
* checksum as "cksum = sum - ((sum - 1) / 255) * 255)". That
* expression may or may not yield a faster checksum function,
* but it's easier to reason about.
*
* Note that if you have a block filled with bytes of a single
* value "X" (regardless of that value!) and calculate the cksum
* of the block (excluding the checksum byte), you will _always_
* end up with a checksum of X. (Do the math; that can be derived
* from the checksum calculation function!) That means that
* blocks which contain bytes which all have the same value will
* always checksum properly. That's a _very_ unlikely occurence
* (probably impossible, actually) for a valid filecore boot block,
* so we treat such blocks as invalid.
*/
static int
filecore_checksum(u_char *bootblock)
{
u_char byte0, accum_diff;
u_int sum;
int i;
sum = 0;
accum_diff = 0;
byte0 = bootblock[0];
/*
* Sum the contents of the block, keeping track of whether
* or not all bytes are the same. If 'accum_diff' ends up
* being zero, all of the bytes are, in fact, the same.
*/
for (i = 0; i < 511; ++i) {
sum += bootblock[i];
accum_diff |= bootblock[i] ^ byte0;
}
/*
* Check to see if the checksum byte is the same as the
* rest of the bytes, too. (Note that if all of the bytes
* are the same except the checksum, a checksum compare
* won't succeed, but that's not our problem.)
*/
accum_diff |= bootblock[i] ^ byte0;
/* All bytes in block are the same; call it invalid. */
if (accum_diff == 0)
return (-1);
return (sum - ((sum - 1) / 255) * 255);
}
int
md_get_info(void)
{
struct disklabel disklabel;
int fd;
char dev_name[100];
static unsigned char bb[DEV_BSIZE];
struct filecore_bootblock *fcbb = (struct filecore_bootblock *)bb;
int offset = 0;
if (strncmp(diskdev, "wd", 2) == 0)
disktype = "ST506";
else
disktype = "SCSI";
snprintf(dev_name, 100, "/dev/r%s%c", diskdev, 'a' + getrawpartition());
fd = open(dev_name, O_RDONLY, 0);
if (fd < 0) {
endwin();
fprintf(stderr, "Can't open %s\n", dev_name);
exit(1);
}
if (ioctl(fd, DIOCGDINFO, &disklabel) == -1) {
endwin();
fprintf(stderr, "Can't read disklabel on %s.\n", dev_name);
close(fd);
exit(1);
}
if (lseek(fd, (off_t)FILECORE_BOOT_SECTOR * DEV_BSIZE, SEEK_SET) < 0
|| read(fd, bb, sizeof(bb)) < sizeof(bb)) {
endwin();
fprintf(stderr, msg_string(MSG_badreadbb));
close(fd);
exit(1);
}
/* Check if table is valid. */
if (filecore_checksum(bb) == fcbb->checksum) {
/*
* Check for NetBSD/arm32 (RiscBSD) partition marker.
* If found the NetBSD disklabel location is easy.
*/
offset = (fcbb->partition_cyl_low +
(fcbb->partition_cyl_high << 8)) *
fcbb->heads * fcbb->secspertrack;
if (fcbb->partition_type == PARTITION_FORMAT_RISCBSD)
;
else if (fcbb->partition_type == PARTITION_FORMAT_RISCIX) {
/*
* Ok we need to read the RISCiX partition table and
* search for a partition named RiscBSD, NetBSD or
* Empty:
*/
struct riscix_partition_table *riscix_part =
(struct riscix_partition_table *)bb;
struct riscix_partition *part;
int loop;
if (lseek(fd, (off_t)offset * DEV_BSIZE, SEEK_SET) < 0
|| read(fd, bb, sizeof(bb)) < sizeof(bb)) {
endwin();
fprintf(stderr, msg_string(MSG_badreadriscix));
close(fd);
exit(1);
}
/* Break out as soon as we find a suitable partition */
for (loop = 0; loop < NRISCIX_PARTITIONS; ++loop) {
part = &riscix_part->partitions[loop];
if (strcmp((char *)part->rp_name, "RiscBSD") == 0
|| strcmp((char *)part->rp_name, "NetBSD") == 0
|| strcmp((char *)part->rp_name, "Empty:") == 0) {
offset = part->rp_start;
break;
}
}
if (loop == NRISCIX_PARTITIONS) {
/*
* Valid filecore boot block, RISCiX partition
* table but no NetBSD partition. We should
* leave this disc alone.
*/
endwin();
fprintf(stderr, msg_string(MSG_notnetbsdriscix));
close(fd);
exit(1);
}
} else {
/*
* Valid filecore boot block and no non-ADFS partition.
* This means that the whole disc is allocated for ADFS
* so do not trash ! If the user really wants to put a
* NetBSD disklabel on the disc then they should remove
* the filecore boot block first with dd.
*/
endwin();
fprintf(stderr, msg_string(MSG_notnetbsd));
close(fd);
exit(1);
}
}
close(fd);
dlcyl = disklabel.d_ncylinders;
dlhead = disklabel.d_ntracks;
dlsec = disklabel.d_nsectors;
sectorsize = disklabel.d_secsize;
dlcylsize = disklabel.d_secpercyl;
/*
* Compute whole disk size. Take max of (dlcyl*dlhead*dlsec)
* and secperunit, just in case the disk is already labelled.
* (If our new label's RAW_PART size ends up smaller than the
* in-core RAW_PART size value, updating the label will fail.)
*/
dlsize = dlcyl*dlhead*dlsec;
if (disklabel.d_secperunit > dlsize)
dlsize = disklabel.d_secperunit;
ptstart = offset;
/* endwin();
printf("dlcyl=%d\n", dlcyl);
printf("dlhead=%d\n", dlhead);
printf("dlsec=%d\n", dlsec);
printf("secsz=%d\n", sectorsize);
printf("cylsz=%d\n", dlcylsize);
printf("dlsz=%d\n", dlsize);
printf("pstart=%d\n", ptstart);
printf("pstart=%d\n", partsize);
printf("secpun=%d\n", disklabel.d_secperunit);
backtowin();*/
return 1;
}
int
md_pre_disklabel(void)
{
return 0;
}
int
md_post_disklabel(void)
{
return 0;
}
int
md_post_newfs(void)
{
#if 0
/* XXX boot blocks ... */
printf(msg_string(MSG_dobootblks), diskdev);
run_program(RUN_DISPLAY, "/sbin/disklabel -B %s /dev/r%sc",
"-b /usr/mdec/rzboot -s /usr/mdec/bootrz", diskdev);
#endif
return 0;
}
int
md_copy_filesystem(void)
{
return 0;
}
int
md_make_bsd_partitions(void)
{
return make_bsd_partitions();
}
int
md_check_partitions(void)
{
return 1;
}
/* Upgrade support */
int
md_update(void)
{
move_aout_libs();
endwin();
md_copy_filesystem();
md_post_newfs();
wrefresh(curscr);
wmove(stdscr, 0, 0);
wclear(stdscr);
wrefresh(stdscr);
return 1;
}
void
md_cleanup_install(void)
{
#ifndef DEBUG
enable_rc_conf();
#endif
}
int
md_pre_update(void)
{
return 1;
}
void
md_init(void)
{
}
void
md_init_set_status(int minimal)
{
(void)minimal;
}
int
md_post_extract(void)
{
return 0;
}