/* $NetBSD: hp300.c,v 1.22 2025/04/05 19:58:50 tsutsui 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.
*
* 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: hp300.c,v 1.22 2025/04/05 19:58:50 tsutsui Exp $");
#endif /* !__lint */

/* We need the target disklabel.h, not the hosts one..... */
#ifdef HAVE_NBTOOL_CONFIG_H
#include "nbtool_config.h"
#include <nbinclude/hp300/disklabel.h>
#include <nbinclude/sys/disklabel.h>
#else
#include <sys/disklabel.h>
#endif
#include <sys/fcntl.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
#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 HP300_MAXBLOCKS 1       /* Only contiguous blocks are expected. */
#define LIF_VOLDIRSIZE  1024    /* size of LIF volume header and directory */

/* XXX: should be HP300_LIF_FILESTART? */
#define LIF_PRESERVED   (HP300_SECTSIZE * 16)

static int hp300_setboot(ib_params *);

struct ib_mach ib_mach_hp300 = {
       .name           =       "hp300",
       .setboot        =       hp300_setboot,
       .clearboot      =       no_clearboot,
       .editboot       =       no_editboot,
       .valid_flags    =       IB_APPEND,
};

static int
hp300_setboot(ib_params *params)
{
       int             retval;
       uint8_t         *bootstrap;
       size_t          bootstrap_mapsize;
       ssize_t         rv;
       struct partition *boot;
       struct hp300_lifdir *lifdir;
       int             size, offset;
       int             i;
       unsigned int    secsize = HP300_SECTSIZE;
       uint64_t        boot_size, boot_offset;
#ifdef SUPPORT_CD9660
       uint32_t        nblk;
       ib_block        *blocks;
#endif
       struct disklabel *label;

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

       retval = 0;
       bootstrap = MAP_FAILED;

       /* needs whole LIF volume/directory and actual bootstrap by default */
       bootstrap_mapsize = params->s1stat.st_size;

       label = malloc(params->sectorsize);
       if (label == NULL) {
               warn("Failed to allocate memory for disklabel");
               goto done;
       }

#ifdef SUPPORT_CD9660
       if (params->stage2 != NULL) {
               /*
                * Use contiguous blocks of SYS_BOOT in the target filesystem
                * (assuming ISO9660) for a LIF directory entry used
                * by BOOTROM on bootstrap.
                */
               if (strcmp(params->fstype->name, "cd9660") != 0) {
                       warn("Target filesystem `%s' is unexpected",
                           params->fstype->name);
               }

               if (S_ISREG(params->fsstat.st_mode)) {
                       if (fsync(params->fsfd) == -1)
                               warn("Synchronising file system `%s'",
                                   params->filesystem);
               } else {
                       /* Don't allow real file systems for sanity */
                       warnx("`%s' must be a regular file to append "
                           "a bootstrap", params->filesystem);
                       goto done;
               }

               /* Allocate space for our block list. */
               nblk = HP300_MAXBLOCKS;
               blocks = malloc(sizeof(*blocks) * nblk);
               if (blocks == NULL) {
                       warn("Allocating %lu bytes for block list",
                           (unsigned long)sizeof(*blocks) * nblk);
                       goto done;
               }

               /* Check the block of for the SYS_UBOOT in the target fs */
               if (!params->fstype->findstage2(params, &nblk, blocks))
                       goto done;

               if (nblk == 0) {
                       warnx("Secondary bootstrap `%s' is empty",
                           params->stage2);
                       goto done;
               } else if (nblk > 1) {
                       warnx("Secondary bootstrap `%s' doesn't have "
                           "contiguous blocks", params->stage2);
                       goto done;
               }

               boot_offset = blocks[0].block * params->fstype->blocksize;
               /* need to read only LIF volume and directories */
               bootstrap_mapsize = LIF_VOLDIRSIZE;

               if ((params->flags & IB_VERBOSE) != 0) {
                       printf("Bootstrap `%s' found at offset %lu in `%s'\n",
                           params->stage2, (unsigned long)boot_offset,
                           params->filesystem);
               }

       } else
#endif
       if ((params->flags & IB_APPEND) != 0) {
               if (!S_ISREG(params->fsstat.st_mode)) {
                       warnx(
                   "`%s' must be a regular file to append a bootstrap",
                           params->filesystem);
                       goto done;
               }
               boot_offset = roundup(params->fsstat.st_size, HP300_SECTSIZE);
       } else {
               /*
                * The bootstrap can be well over 8k, and must go into a BOOT
                * partition. Read NetBSD label to locate BOOT partition.
                */
               if (pread(params->fsfd, label, params->sectorsize,
                   LABELSECTOR * params->sectorsize)
                   != (ssize_t)params->sectorsize) {
                       warn("reading disklabel");
                       goto done;
               }
               /* And a quick validation - must be a big-endian label */
               secsize = be32toh(label->d_secsize);
               if (label->d_magic != htobe32(DISKMAGIC) ||
                   label->d_magic2 != htobe32(DISKMAGIC) ||
                   secsize == 0 || !powerof2(secsize) ||
                   be16toh(label->d_npartitions) > MAXMAXPARTITIONS) {
                       warnx("Invalid disklabel in %s", params->filesystem);
                       goto done;
               }

               i = be16toh(label->d_npartitions);
               for (boot = label->d_partitions; ; boot++) {
                       if (--i < 0) {
                               warnx("No BOOT partition");
                               goto done;
                       }
                       if (boot->p_fstype == FS_BOOT)
                               break;
               }
               boot_size = be32toh(boot->p_size) * (uint64_t)secsize;
               boot_offset = be32toh(boot->p_offset) * (uint64_t)secsize;

               /*
                * We put the entire LIF file into the BOOT partition even when
                * it doesn't start at the beginning of the disk.
                *
                * Maybe we ought to be able to take a binary file and add
                * it to the LIF filesystem.
                */
               if (boot_size < (uint64_t)params->s1stat.st_size) {
                       warn("BOOT partition too small (%llu < %llu)",
                               (unsigned long long)boot_size,
                               (unsigned long long)params->s1stat.st_size);
                       goto done;
               }
       }

       /* Read LIF volume/directory (and bootstrap) from stage1 */
       bootstrap = mmap(NULL, bootstrap_mapsize,
           PROT_READ | PROT_WRITE, MAP_PRIVATE, params->s1fd, 0);
       if (bootstrap == MAP_FAILED) {
               warn("mmapping `%s'", params->stage1);
               goto done;
       }

       /* Relocate files, sanity check LIF directory on the way */
       lifdir = (void *)(bootstrap + HP300_LIF_DIRSTART);
       for (i = 0; i < HP300_LIF_NUMDIR; i++) {
               uint32_t addr = be32toh(lifdir[i].dir_addr);
               uint32_t limit = hp300_btolifs(params->s1stat.st_size);
               uint32_t end = addr + be32toh(lifdir[i].dir_length);
               if (end > limit) {
                       warnx("LIF entry %d larger (%u %u) than LIF file",
                           i, end, limit);
                       goto done;
               }
               if (addr != 0 && boot_offset != 0)
                       lifdir[i].dir_addr =
                           htobe32(boot_offset / HP300_SECTSIZE + addr);
       }

       if ((params->flags & IB_NOWRITE) != 0) {
               retval = 1;
               goto done;
       }

       /* Write LIF volume header and directory to sectors 0 and 1 */
       rv = pwrite(params->fsfd, bootstrap, LIF_VOLDIRSIZE, 0);
       if (rv != LIF_VOLDIRSIZE) {
               if (rv == -1)
                       warn("Writing `%s'", params->filesystem);
               else
                       warnx("Writing `%s': short write", params->filesystem);
               goto done;
       }

#ifdef SUPPORT_CD9660
       if (params->stage2 != NULL) {
               /*
                * Bootstrap in the target filesystem is used.
                * No need to write bootstrap to BOOT partition.
                */
               retval = 1;
               goto done;
       }
#endif

       /* Write bootstrap to BOOT partition (or at EOF in IB_APPEND case) */
       /* LIF header and directories, and disklabel should be preserved */
       offset = (boot_offset <= LIF_PRESERVED) ? LIF_PRESERVED : 0;
       size = roundup(params->s1stat.st_size, secsize) - offset;

       rv = pwrite(params->fsfd, bootstrap + offset, size,
           boot_offset + offset);
       if (rv != size) {
               if (rv == -1)
                       warn("Writing boot filesystem of `%s'",
                           params->filesystem);
               else
                       warnx("Writing boot filesystem of `%s': short write",
                           params->filesystem);
               goto done;
       }

       retval = 1;

done:
       if (label != NULL)
               free(label);
       if (bootstrap != MAP_FAILED)
               munmap(bootstrap, bootstrap_mapsize);
       return retval;
}

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