/*      $NetBSD: x68k.c,v 1.5 2019/05/07 04:35:31 thorpej 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.
 *
 * 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: x68k.c,v 1.5 2019/05/07 04:35:31 thorpej 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"

#define X68K_LABELOFFSET                64
#define X68K_LABELSIZE          404 /* reserve 16 partitions */

static int x68k_clearheader(ib_params *, struct bbinfo_params *, uint8_t *);

static int x68k_clearboot(ib_params *);
static int x68k_setboot(ib_params *);

struct ib_mach ib_mach_x68k = {
        .name           =       "x68k",
        .setboot        =       x68k_setboot,
        .clearboot      =       x68k_clearboot,
        .editboot       =       no_editboot,
        .valid_flags    =       IB_STAGE1START | IB_STAGE2START,
};

static struct bbinfo_params bbparams = {
        X68K_BBINFO_MAGIC,
        X68K_BOOT_BLOCK_OFFSET,
        X68K_BOOT_BLOCK_BLOCKSIZE,
        X68K_BOOT_BLOCK_MAX_SIZE,
        X68K_LABELOFFSET + X68K_LABELSIZE, /* XXX */
        BBINFO_BIG_ENDIAN,
};

static int
x68k_clearboot(ib_params *params)
{

        assert(params != NULL);

        if (params->flags & IB_STAGE1START) {
                warnx("`-b bno' is not supported for %s",
                        params->machine->name);
                return 0;
        }
        return shared_bbinfo_clearboot(params, &bbparams, x68k_clearheader);
}

static int
x68k_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, X68K_LABELOFFSET);
        return 1;
}

static int
x68k_setboot(ib_params *params)
{
        struct stat     bootstrapsb;
        char            bb[X68K_BOOT_BLOCK_MAX_SIZE];
        char            label[X68K_LABELSIZE];
        uint32_t        s1start;
        int             retval;
        ssize_t         rv;

        assert(params != NULL);
        assert(params->fsfd != -1);
        assert(params->filesystem != NULL);
        assert(params->s1fd != -1);
        assert(params->stage1 != NULL);

        retval = 0;

        if (params->flags & IB_STAGE1START)
                s1start = params->s1start;
        else
                s1start = X68K_BOOT_BLOCK_OFFSET /
                    X68K_BOOT_BLOCK_BLOCKSIZE;

        /* read disklabel on the target disk */
        rv = pread(params->fsfd, label, sizeof label,
                   s1start * X68K_BOOT_BLOCK_BLOCKSIZE + X68K_LABELOFFSET);
        if (rv == -1) {
                warn("Reading `%s'", params->filesystem);
                goto done;
        } else if (rv != sizeof label) {
                warnx("Reading `%s': short read", params->filesystem);
                goto done;
        }

        if (fstat(params->s1fd, &bootstrapsb) == -1) {
                warn("Examining `%s'", params->stage1);
                goto done;
        }
        if (!S_ISREG(bootstrapsb.st_mode)) {
                warnx("`%s' must be a regular file", params->stage1);
                goto done;
        }

        /* read boot loader */
        memset(&bb, 0, sizeof bb);
        rv = read(params->s1fd, &bb, sizeof bb);
        if (rv == -1) {
                warn("Reading `%s'", params->stage1);
                goto done;
        }
        /* then, overwrite disklabel */
        memcpy(&bb[X68K_LABELOFFSET], &label, sizeof label);

        if (params->flags & IB_VERBOSE) {
                printf("Bootstrap start sector: %#x\n", s1start);
                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;
        }

        /* write boot loader and disklabel into the target disk */
        rv = pwrite(params->fsfd, &bb, X68K_BOOT_BLOCK_MAX_SIZE,
            s1start * X68K_BOOT_BLOCK_BLOCKSIZE);
        if (rv == -1) {
                warn("Writing `%s'", params->filesystem);
                goto done;
        } else if (rv != X68K_BOOT_BLOCK_MAX_SIZE) {
                warnx("Writing `%s': short write", params->filesystem);
                goto done;
        } else
                retval = 1;

 done:
        return (retval);
}