/*      $NetBSD: bootxx.c,v 1.17 2026/03/30 03:32:22 thorpej Exp $ */

/*-
 * Copyright (c) 1998 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Paul Kranenburg.
 *
 * 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.
 */

/*
 * This is a generic "first-stage" boot program.
 *
 * Note that this program has absolutely no filesystem knowledge!
 *
 * Instead, this uses a table of disk block numbers that are
 * filled in by the installboot program such that this program
 * can load the "second-stage" boot program.
 */

#include <sys/param.h>
#include <sys/time.h>
#include <sys/exec.h>
#include <sys/exec_elf.h>
#include <sys/exec_aout.h>
#include <machine/prom.h>

#include <lib/libsa/stand.h>
#include "libsa.h"
#include "bootxx.h"

int copyboot(struct open_file *, u_long *);

/*
 * Boot device is derived from ROM provided information.
 */
#define LOADADDR        0x11000 /* where to load level 2 bootstrap */
                                /* (l2 must relocate itself) */

extern int      block_size;
extern int      block_count;    /* length of table */
/* XXX ondisk32 */
extern int32_t  block_table[];

extern          char bootprog_name[], bootprog_rev[];

int main(void);

int
main(void)
{
        struct open_file f;
        u_long addr;
        char *foo;
        int error;
        int targ = (bugargs.dev_lun >> 4) & 0xf;
        int lun  =  bugargs.dev_lun       & 0xf;

        printf("Boot: bug device: ctrl=%d, dev=%d.%d\n",
            bugargs.ctrl_lun, targ, lun);
        printf("\nbootxx: %s first level bootstrap program [%s]\n\n",
            bootprog_name, bootprog_rev);

        f.f_flags = F_RAW;
        if (devopen(&f, 0, &foo)) {
                printf("bootxx: open failed\n");
                _rtt();
        }

        addr = LOADADDR;
        error = copyboot(&f, &addr);
        f.f_dev->dv_close(&f);
        if (error == 0)
                bugexec((void *)addr);

        /* copyboot had a problem... */
        _rtt();
}

int
copyboot(struct open_file *fp, u_long *addr)
{
        int     i, blknum;
        size_t  n;
        char    *laddr = (char *) *addr;
        union boothead {
                struct exec ah;
                Elf32_Ehdr eh;
        } *x;

        x = (union boothead *)laddr;

        if (!block_count) {
                printf("bootxx: no data!?!\n");
                return -1;
        }

        for (i = 0; i < block_count; i++) {
                if ((blknum = block_table[i]) == 0)
                        break;
#ifdef DEBUG
                printf("bootxx: read block # %d = %d\n", i, blknum);
#endif
                if ((fp->f_dev->dv_strategy)(fp->f_devdata, F_READ,
                    blknum, block_size, laddr, &n)) {
                        printf("bootxx: read failed\n");
                        return -1;
                }
                if (n != block_size) {
                        printf("bootxx: short read\n");
                        return -1;
                }
                laddr += block_size;
        }

        if (N_GETMAGIC(x->ah) == OMAGIC)
                *addr += sizeof(x->ah);
        else if (memcmp(x->eh.e_ident, ELFMAG, SELFMAG) == 0) {
                Elf32_Phdr *ep = (Elf32_Phdr *)(*addr + x->eh.e_phoff);
                *addr += ep->p_offset;
        } else {
                printf("bootxx: secondary bootstrap isn't an executable\n");
                return -1;
        }

        return 0;
}