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bootxx.c revision 1.5 
      1 /*	$NetBSD: bootxx.c,v 1.5 2000/07/24 18:39:21 jdolecek 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  * 3. All advertising materials mentioning features or use of this software
     19  *    must display the following acknowledgement:
     20  *        This product includes software developed by the NetBSD
     21  *        Foundation, Inc. and its contributors.
     22  * 4. Neither the name of The NetBSD Foundation nor the names of its
     23  *    contributors may be used to endorse or promote products derived
     24  *    from this software without specific prior written permission.
     25  *
     26  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     27  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     28  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     29  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     30  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     31  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     32  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     33  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     34  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     35  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     36  * POSSIBILITY OF SUCH DAMAGE.
     37  */
     38 
     39 /*
     40  * This is a generic "first-stage" boot program.
     41  *
     42  * Note that this program has absolutely no filesystem knowledge!
     43  *
     44  * Instead, this uses a table of disk block numbers that are
     45  * filled in by the installboot program such that this program
     46  * can load the "second-stage" boot program.
     47  */
     48 
     49 #include <sys/param.h>
     50 #include <sys/time.h>
     51 #include <sys/exec.h>
     52 #include <machine/prom.h>
     53 
     54 #include "stand.h"
     55 #include "libsa.h"
     56 
     57 int copyboot __P((struct open_file *, char *));
     58 void main __P((void));
     59 
     60 /*
     61  * Boot device is derived from ROM provided information.
     62  */
     63 #define LOADADDR	0x11000 /* where to load level 2 bootstrap */
     64 				/* (l2 must relocate itself) */
     65 
     66 /* This determines the largest boot program we can load. */
     67 #define MAXBLOCKNUM	64
     68 
     69 /*
     70  * These three names are known by installboot.
     71  * The block_table contains starting block numbers,
     72  * in terms of 512-byte blocks.  Each non-zero value
     73  * will result in a read of block_size bytes.
     74  */
     75 int     	block_size = 512;	/* default */
     76 int     	block_count = MAXBLOCKNUM;	/* length of table */
     77 daddr_t 	block_table[MAXBLOCKNUM] = { 0 };
     78 
     79 extern		char bootprog_name[], bootprog_rev[];
     80 
     81 void
     82 main()
     83 {
     84 	struct open_file	f;
     85 	char	*addr;
     86 	int error;
     87 
     88 	printf("Boot: bug device: ctrl=%d, dev=%d\n",
     89 		bugargs.ctrl_lun, bugargs.dev_lun);
     90 	printf("\nbootxx: %s first level bootstrap program [%s]\n\n",
     91 		bootprog_name, bootprog_rev);
     92 
     93 	f.f_flags = F_RAW;
     94 	if (devopen(&f, 0, &addr)) {
     95 		printf("bootxx: open failed\n");
     96 		_rtt();
     97 	}
     98 
     99 	addr = (char*)LOADADDR;
    100 	error = copyboot(&f, addr);
    101 	f.f_dev->dv_close(&f);
    102 	if (!error)
    103 		bugexec((void (*)__P((void)))addr);
    104 
    105 	/* copyboot had a problem... */
    106 	_rtt();
    107 }
    108 
    109 int
    110 copyboot(fp, addr)
    111 	struct open_file	*fp;
    112 	char			*addr;
    113 {
    114 	int	n, i, blknum;
    115 	struct exec *x;
    116 
    117 	addr -= sizeof(struct exec); /* assume OMAGIC, verify below */
    118 	x = (struct exec *)addr;
    119 
    120 	if (!block_count) {
    121 		printf("bootxx: no data!?!\n");
    122 		return -1;
    123 	}
    124 
    125 	for (i = 0; i < block_count; i++) {
    126 
    127 		if ((blknum = block_table[i]) == 0)
    128 			break;
    129 
    130 #ifdef DEBUG
    131 		printf("bootxx: read block # %d = %d\n", i, blknum);
    132 #endif
    133 		if ((fp->f_dev->dv_strategy)(fp->f_devdata, F_READ,
    134 					   blknum, block_size, addr, &n))
    135 		{
    136 			printf("bootxx: read failed\n");
    137 			return -1;
    138 		}
    139 		if (n != block_size) {
    140 			printf("bootxx: short read\n");
    141 			return -1;
    142 		}
    143 		addr += block_size;
    144 	}
    145 
    146 	if (N_GETMAGIC(*x) != OMAGIC) {
    147 		printf("bootxx: secondary bootstrap isn't in OMAGIC format\n");
    148 		return(-1);
    149 	}
    150 
    151 	return 0;
    152 }
    153