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/* $OpenBSD: bootxx.c,v 1.6 2006/05/16 22:52:09 miod Exp $ */
/*
* Copyright (c) 1994 Paul Kranenburg
* All rights reserved.
*
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Paul Kranenburg.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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/time.h>
#include <sys/exec.h>
#include <machine/prom.h>
#include "stand.h"
#include "libsa.h"
/*
* Boot device is derived from ROM provided information.
*/
/* This determines the largest boot program we can load. */
#define MAXBLOCKNUM 64
/*
* These three names are known by installboot.
* The block_table contains starting block numbers,
* in terms of 512-byte blocks. Each non-zero value
* will result in a read of block_size bytes.
*/
size_t block_size = 512; /* default */
int block_count = MAXBLOCKNUM; /* length of table */
daddr_t block_table[MAXBLOCKNUM] = { 0 };
extern char *version;
int copyboot(struct open_file *, char *);
int
main()
{
struct open_file f;
char *addr;
int error;
printf("\nbootxx: first level bootstrap program [%s]\n", version);
#ifdef DEBUG
printf("boot device: ctrl=%d, dev=%d\n",
bugargs.ctrl_lun, bugargs.dev_lun);
#endif
f.f_flags = F_RAW;
if (devopen(&f, 0, &addr)) {
printf("bootxx: open failed\n");
_rtt();
}
addr = (char *)STAGE2_RELOC;
error = copyboot(&f, addr);
f.f_dev->dv_close(&f);
if (!error) {
bugexec((void (*)())addr + 8);
}
/* copyboot had a problem... */
_rtt();
return (0);
}
int
copyboot(struct open_file *fp, char *addr)
{
size_t n;
int i, blknum;
struct exec *x;
addr -= sizeof(struct exec); /* assume OMAGIC, verify below */
x = (struct exec *)addr;
if (!block_count) {
printf("bootxx: no data!?!\n");
return -1;
}
for (i = 0; i < block_count; i++) {
if ((blknum = block_table[i]) == 0)
break;
#ifdef DEBUG
printf("bootxx: read block # %d = %d\n", i, blknum);
#endif
if ((fp->f_dev->dv_strategy)(fp->f_devdata, F_READ,
blknum, block_size, addr, &n)) {
printf("bootxx: read failed\n");
return -1;
}
if (n != block_size) {
printf("bootxx: short read\n");
return -1;
}
addr += block_size;
}
if (N_GETMAGIC(*x) != OMAGIC) {
printf("bootxx: secondary bootstrap isn't in OMAGIC format\n");
return(-1);
}
return 0;
}
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