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      1 /*	$NetBSD: bootxx.c,v 1.12 2009/01/12 07:00:59 tsutsui Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 1998 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Paul Kranenburg.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 /*
     33  * This is a generic "first-stage" boot program.
     34  *
     35  * Note that this program has absolutely no filesystem knowledge!
     36  *
     37  * Instead, this uses a table of disk block numbers that are
     38  * filled in by the installboot program such that this program
     39  * can load the "second-stage" boot program.
     40  */
     41 
     42 #include <sys/param.h>
     43 #include <sys/bootblock.h>
     44 #include <machine/mon.h>
     45 
     46 #include <stand.h>
     47 #include "libsa.h"
     48 
     49 int copyboot(struct open_file *, char *);
     50 
     51 /*
     52  * This is the address where we load the second-stage boot loader.
     53  */
     54 #define LOADADDR	0x4000
     55 
     56 /*
     57  * The contents of the sun68k_bbinfo below are set by installboot(8)
     58  * to hold the filesystem data of the second-stage boot program
     59  * (typically `/ufsboot'): filesystem block size, # of filesystem
     60  * blocks and the block numbers themselves.
     61  */
     62 struct shared_bbinfo bbinfo = {
     63 	{ SUN68K_BBINFO_MAGIC },
     64 	0,
     65 	SHARED_BBINFO_MAXBLOCKS,
     66 	{ 0 }
     67 };
     68 
     69 int
     70 main(void)
     71 {
     72 	struct open_file	f;
     73 	void	*entry;
     74 	char	*addr;
     75 	int error;
     76 
     77 #ifdef DEBUG
     78 	printf("bootxx: open...\n");
     79 #endif
     80 	f.f_flags = F_RAW;
     81 	if (devopen(&f, 0, &addr)) {
     82 		putstr("bootxx: devopen failed\n");
     83 		return 1;
     84 	}
     85 
     86 	addr = (char*)LOADADDR;
     87 	error = copyboot(&f, addr);
     88 	f.f_dev->dv_close(&f);
     89 	if (!error) {
     90 #ifdef DEBUG
     91 		printf("bootxx: start 0x%x\n", (long)addr);
     92 #endif
     93 		entry = addr;
     94 		chain_to(entry);
     95 	}
     96 	/* copyboot had a problem... */
     97 	return 0;
     98 }
     99 
    100 int
    101 copyboot(struct open_file *fp, char *addr)
    102 {
    103 	size_t n;
    104 	int i, blknum;
    105 	char *buf;
    106 
    107 	/* Need to use a buffer that can be mapped into DVMA space. */
    108 	buf = alloc(bbinfo.bbi_block_size);
    109 	if (!buf)
    110 		panic("bootxx: alloc failed");
    111 
    112 	for (i = 0; i < bbinfo.bbi_block_count; i++) {
    113 
    114 		if ((blknum = bbinfo.bbi_block_table[i]) == 0)
    115 			break;
    116 
    117 #ifdef DEBUG
    118 		printf("bootxx: block # %d = %d\n", i, blknum);
    119 #endif
    120 		if ((fp->f_dev->dv_strategy)(fp->f_devdata, F_READ, blknum,
    121 					   bbinfo.bbi_block_size, buf, &n))
    122 		{
    123 			putstr("bootxx: read failed\n");
    124 			return -1;
    125 		}
    126 		if (n != bbinfo.bbi_block_size) {
    127 			putstr("bootxx: short read\n");
    128 			return -1;
    129 		}
    130 		memcpy(addr, buf, bbinfo.bbi_block_size);
    131 		addr += bbinfo.bbi_block_size;
    132 	}
    133 
    134 	return 0;
    135 }
    136