/*      $NetBSD: bootxx.c,v 1.26 2015/10/08 20:58:13 joerg 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.
 */

#include <sys/param.h>
#include <sys/exec.h>
#include <sys/exec_aout.h>
#include <sys/bootblock.h>

#include <lib/libkern/libkern.h>
#include <lib/libsa/stand.h>

#include <machine/promlib.h>
#include <sparc/stand/common/promdev.h>

int debug;
int netif_debug;

/*
 * Boot device is derived from ROM provided information.
 */
const char              progname[] = "bootxx";
struct open_file        io;

/*
 * The contents of the bbinfo below are set by installboot(8)
 * to hold the filesystem data of the second-stage boot program
 * (typically `/boot'): filesystem block size, # of filesystem
 * blocks and the block numbers themselves.
 */
struct shared_bbinfo bbinfo = {
        { SPARC_BBINFO_MAGIC },
        0,
        SHARED_BBINFO_MAXBLOCKS,
        { 0 }
};

int     main(void);
void    loadboot(struct open_file *, char *);

int
main(void)
{
        char    *dummy1;
        const char      *dummy;
        void (*entry)(void *) = (void (*)(void *))PROM_LOADADDR;
        void    *arg;

#ifdef HEAP_VARIABLE
        {
                extern char end[];
                setheap((void *)ALIGN(end), (void *)0xffffffff);
        }
#endif
        prom_init();
        dummy = prom_getbootpath();
        if (dummy && *dummy != '\0')
                strcpy(prom_bootdevice, dummy);
        io.f_flags = F_RAW;
        if (devopen(&io, 0, &dummy1)) {
                panic("%s: can't open device `%s'", progname,
                        prom_bootdevice[0] ? prom_bootdevice : "unknown");
        }

        (void)loadboot(&io, (void *)PROM_LOADADDR);
        (io.f_dev->dv_close)(&io);

        arg = (prom_version() == PROM_OLDMON) ? (void *)PROM_LOADADDR : romp;
        (*entry)(arg);
        _rtt();
}

void
loadboot(struct open_file *f, char *addr)
{
        int     i;
        char    *buf;
        size_t          n;
        daddr_t         blk;

        /*
         * Allocate a buffer that we can map into DVMA space; only
         * needed for sun4 architecture, but use it for all machines
         * to keep code size down as much as possible.
         */
        buf = alloc(bbinfo.bbi_block_size);
        if (buf == NULL)
                panic("%s: alloc failed", progname);

        for (i = 0; i < bbinfo.bbi_block_count; i++) {
                if ((blk = bbinfo.bbi_block_table[i]) == 0)
                        panic("%s: block table corrupt", progname);

#ifdef DEBUG
                printf("%s: block # %d = %d\n", progname, i, blk);
#endif
                if ((f->f_dev->dv_strategy)(f->f_devdata, F_READ, blk,
                    bbinfo.bbi_block_size, buf, &n)) {
                        printf("%s: read failure", progname);
                        _rtt();
                }
                memcpy(addr, buf, bbinfo.bbi_block_size);
                if (n != bbinfo.bbi_block_size)
                        panic("%s: short read", progname);
                if (i == 0) {
                        int m = N_GETMAGIC(*(struct exec *)addr);
                        if (m == ZMAGIC || m == NMAGIC || m == OMAGIC) {
                                /* Move exec header out of the way */
                                memcpy(addr - sizeof(struct exec), addr, n);
                                addr -= sizeof(struct exec);
                        }
                }
                addr += n;
        }

}