/*      $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;
       }

}