/*      $NetBSD: bootxx.c,v 1.12 2009/01/12 07:00:59 tsutsui 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/bootblock.h>
#include <machine/mon.h>

#include <stand.h>
#include "libsa.h"

int copyboot(struct open_file *, char *);

/*
* This is the address where we load the second-stage boot loader.
*/
#define LOADADDR        0x4000

/*
* The contents of the sun68k_bbinfo below are set by installboot(8)
* to hold the filesystem data of the second-stage boot program
* (typically `/ufsboot'): filesystem block size, # of filesystem
* blocks and the block numbers themselves.
*/
struct shared_bbinfo bbinfo = {
       { SUN68K_BBINFO_MAGIC },
       0,
       SHARED_BBINFO_MAXBLOCKS,
       { 0 }
};

int
main(void)
{
       struct open_file        f;
       void    *entry;
       char    *addr;
       int error;

#ifdef DEBUG
       printf("bootxx: open...\n");
#endif
       f.f_flags = F_RAW;
       if (devopen(&f, 0, &addr)) {
               putstr("bootxx: devopen failed\n");
               return 1;
       }

       addr = (char*)LOADADDR;
       error = copyboot(&f, addr);
       f.f_dev->dv_close(&f);
       if (!error) {
#ifdef DEBUG
               printf("bootxx: start 0x%x\n", (long)addr);
#endif
               entry = addr;
               chain_to(entry);
       }
       /* copyboot had a problem... */
       return 0;
}

int
copyboot(struct open_file *fp, char *addr)
{
       size_t n;
       int i, blknum;
       char *buf;

       /* Need to use a buffer that can be mapped into DVMA space. */
       buf = alloc(bbinfo.bbi_block_size);
       if (!buf)
               panic("bootxx: alloc failed");

       for (i = 0; i < bbinfo.bbi_block_count; i++) {

               if ((blknum = bbinfo.bbi_block_table[i]) == 0)
                       break;

#ifdef DEBUG
               printf("bootxx: block # %d = %d\n", i, blknum);
#endif
               if ((fp->f_dev->dv_strategy)(fp->f_devdata, F_READ, blknum,
                                          bbinfo.bbi_block_size, buf, &n))
               {
                       putstr("bootxx: read failed\n");
                       return -1;
               }
               if (n != bbinfo.bbi_block_size) {
                       putstr("bootxx: short read\n");
                       return -1;
               }
               memcpy(addr, buf, bbinfo.bbi_block_size);
               addr += bbinfo.bbi_block_size;
       }

       return 0;
}