143 lines
4.0 KiB
C
143 lines
4.0 KiB
C
/* $NetBSD: bootxx.c,v 1.10 2001/02/22 07:11:10 chs Exp $ */
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/*-
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* Copyright (c) 1998 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Paul Kranenburg.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* This is a generic "first-stage" boot program.
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*
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* Note that this program has absolutely no filesystem knowledge!
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*
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* Instead, this uses a table of disk block numbers that are
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* filled in by the installboot program such that this program
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* can load the "second-stage" boot program.
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*/
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#include <sys/param.h>
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#include <machine/mon.h>
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#include <stand.h>
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#include "libsa.h"
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/*
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* This is the address where we load the second-stage boot loader.
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*/
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#define LOADADDR 0x4000
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/* This determines the largest boot program we can load. */
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#define MAXBLOCKNUM 64
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/*
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* These three names are known by installboot.
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* The block_table contains starting block numbers,
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* in terms of 512-byte blocks. Each non-zero value
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* will result in a read of block_size bytes.
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*/
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int block_size = 512; /* default */
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int block_count = MAXBLOCKNUM; /* length of table */
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daddr_t block_table[MAXBLOCKNUM] = { 0 };
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void
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main()
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{
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struct open_file f;
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void *entry;
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char *addr;
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int n, error;
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#ifdef DEBUG
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printf("bootxx: open...\n");
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#endif
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f.f_flags = F_RAW;
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if (devopen(&f, 0, &addr)) {
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printf("bootxx: devopen failed\n");
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return;
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}
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addr = (char*)LOADADDR;
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error = copyboot(&f, addr);
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f.f_dev->dv_close(&f);
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if (!error) {
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#ifdef DEBUG
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printf("bootxx: start 0x%x\n", (long)addr);
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#endif
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entry = addr;
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chain_to(entry);
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}
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/* copyboot had a problem... */
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return;
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}
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int
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copyboot(fp, addr)
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struct open_file *fp;
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char *addr;
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{
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int n, i, blknum;
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char *buf;
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/* Need to use a buffer that can be mapped into DVMA space. */
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buf = alloc(block_size);
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if (!buf)
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panic("bootxx: alloc failed");
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for (i = 0; i < block_count; i++) {
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if ((blknum = block_table[i]) == 0)
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break;
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#ifdef DEBUG
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printf("bootxx: block # %d = %d\n", i, blknum);
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#endif
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if ((fp->f_dev->dv_strategy)(fp->f_devdata, F_READ,
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blknum, block_size, buf, &n))
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{
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printf("bootxx: read failed\n");
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return -1;
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}
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if (n != block_size) {
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printf("bootxx: short read\n");
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return -1;
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}
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bcopy(buf, addr, block_size);
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addr += block_size;
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}
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return 0;
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}
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