/*      $NetBSD: macppc.c,v 1.12 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.
 *
 * 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: macppc.c,v 1.12 2019/05/07 04:35:31 thorpej Exp $");
#endif  /* !__lint */

#include <sys/param.h>
#ifndef HAVE_NBTOOL_CONFIG_H
#include <sys/ioctl.h>
#include <sys/dkio.h>
#include <errno.h>
#endif

#include <assert.h>
#include <err.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>

#include "installboot.h"

static struct bbinfo_params bbparams = {
        MACPPC_BBINFO_MAGIC,
        MACPPC_BOOT_BLOCK_OFFSET,
        MACPPC_BOOT_BLOCK_BLOCKSIZE,
        MACPPC_BOOT_BLOCK_MAX_SIZE,
        0,
        BBINFO_BIG_ENDIAN,
};

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

static int macppc_clearboot(ib_params *);
static int macppc_setboot(ib_params *);

struct ib_mach ib_mach_macppc = {
        .name           =       "macppc",
        .setboot        =       macppc_setboot,
        .clearboot      =       macppc_clearboot,
        .editboot       =       no_editboot,
        .valid_flags    =       IB_STAGE2START,
};

static int
macppc_clearboot(ib_params *params)
{

        assert(params != NULL);

                /* XXX: maybe clear the apple partition map too? */
        return (shared_bbinfo_clearboot(params, &bbparams, NULL));
}

static int
macppc_setboot(ib_params *params)
{

        assert(params != NULL);

        return (shared_bbinfo_setboot(params, &bbparams, writeapplepartmap));
}


static int
writeapplepartmap(ib_params *params, struct bbinfo_params *bb_params,
    uint8_t *bb)
{
        struct apple_drvr_map dm;
        struct apple_part_map_entry pme;
        int rv;

        assert (params != NULL);
        assert (bb_params != NULL);
        assert (bb != NULL);

        if (params->flags & IB_NOWRITE)
                return (1);

                /* block 0: driver map  */
        if (pread(params->fsfd, &dm, MACPPC_BOOT_BLOCK_BLOCKSIZE, 0) !=
            MACPPC_BOOT_BLOCK_BLOCKSIZE) {
                warn("Can't read sector 0 of `%s'", params->filesystem);
                return (0);
        }
        dm.sbSig =              htobe16(APPLE_DRVR_MAP_MAGIC);
        dm.sbBlockSize =        htobe16(512);
        dm.sbBlkCount =         htobe32(0);

        rv = pwrite(params->fsfd, &dm, MACPPC_BOOT_BLOCK_BLOCKSIZE, 0);
#ifdef DIOCWLABEL
        if (rv == -1 && errno == EROFS) {
                /*
                 * block 0 is LABELSECTOR which might be protected by
                 * bounds_check_with_label(9).
                 */
                int enable;

                enable = 1;
                rv = ioctl(params->fsfd, DIOCWLABEL, &enable);
                if (rv != 0) {
                        warn("Cannot enable writes to the label sector");
                        return 0;
                }

                rv = pwrite(params->fsfd, &dm, MACPPC_BOOT_BLOCK_BLOCKSIZE, 0);

                /* Reset write-protect. */
                enable = 0;
                (void)ioctl(params->fsfd, DIOCWLABEL, &enable);
        }
#endif
        if (rv != MACPPC_BOOT_BLOCK_BLOCKSIZE) {
                warn("Can't write sector 0 of `%s'", params->filesystem);
                return (0);
        }

                /* block 1: Apple Partition Map */
        memset(&pme, 0, sizeof(pme));
        pme.pmSig =             htobe16(APPLE_PART_MAP_ENTRY_MAGIC);
        pme.pmMapBlkCnt =       htobe32(2);
        pme.pmPyPartStart =     htobe32(1);
        pme.pmPartBlkCnt =      htobe32(2);
        pme.pmDataCnt =         htobe32(2);
        strlcpy(pme.pmPartName, "Apple", sizeof(pme.pmPartName));
        strlcpy(pme.pmPartType, "Apple_partition_map", sizeof(pme.pmPartType));
        pme.pmPartStatus =      htobe32(0x37);
        if (pwrite(params->fsfd, &pme, MACPPC_BOOT_BLOCK_BLOCKSIZE,
            1 * MACPPC_BOOT_BLOCK_BLOCKSIZE) != MACPPC_BOOT_BLOCK_BLOCKSIZE) {
                warn("Can't write Apple Partition Map into sector 1 of `%s'",
                    params->filesystem);
                return (0);
        }

                /* block 2: NetBSD partition */
        memset(&pme, 0, sizeof(pme));
        pme.pmSig =             htobe16(APPLE_PART_MAP_ENTRY_MAGIC);
        pme.pmMapBlkCnt =       htobe32(2);
        pme.pmPyPartStart =     htobe32(4);
        pme.pmPartBlkCnt =      htobe32(0x7fffffff);
        pme.pmDataCnt =         htobe32(0x7fffffff);
        strlcpy(pme.pmPartName, "NetBSD", sizeof(pme.pmPartName));
        strlcpy(pme.pmPartType, "NetBSD/macppc", sizeof(pme.pmPartType));
        pme.pmPartStatus =      htobe32(0x3b);
        pme.pmBootSize =        htobe32(roundup(params->s1stat.st_size, 512));
        pme.pmBootLoad =        htobe32(0x4000);
        pme.pmBootEntry =       htobe32(0x4000);
        strlcpy(pme.pmProcessor, "PowerPC", sizeof(pme.pmProcessor));
        if (pwrite(params->fsfd, &pme, MACPPC_BOOT_BLOCK_BLOCKSIZE,
            2 * MACPPC_BOOT_BLOCK_BLOCKSIZE) != MACPPC_BOOT_BLOCK_BLOCKSIZE) {
                warn("Can't write Apple Partition Map into sector 2 of `%s'",
                    params->filesystem);
                return (0);
        }

        return (1);
}