153 lines
4.3 KiB
C
153 lines
4.3 KiB
C
/* $NetBSD: bootxx.c,v 1.14 2008/01/12 09:54:30 tsutsui 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 <sys/time.h>
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#include <sys/exec.h>
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#include <sys/exec_elf.h>
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#include <machine/prom.h>
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#include <lib/libsa/stand.h>
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#include "libsa.h"
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#include "bootxx.h"
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int copyboot(struct open_file *, u_long *);
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/*
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* Boot device is derived from ROM provided information.
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*/
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#define LOADADDR 0x11000 /* where to load level 2 bootstrap */
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/* (l2 must relocate itself) */
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extern int block_size;
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extern int block_count; /* length of table */
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/* XXX ondisk32 */
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extern int32_t block_table[];
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extern char bootprog_name[], bootprog_rev[];
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int main(void);
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int
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main(void)
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{
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struct open_file f;
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u_long addr;
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char *foo;
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int error;
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printf("Boot: bug device: ctrl=%d, dev=%d\n",
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bugargs.ctrl_lun, bugargs.dev_lun);
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printf("\nbootxx: %s first level bootstrap program [%s]\n\n",
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bootprog_name, bootprog_rev);
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f.f_flags = F_RAW;
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if (devopen(&f, 0, &foo)) {
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printf("bootxx: open failed\n");
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_rtt();
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}
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addr = 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 == 0)
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bugexec((void *)addr);
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/* copyboot had a problem... */
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_rtt();
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}
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int
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copyboot(struct open_file *fp, u_long *addr)
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{
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int i, blknum;
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size_t n;
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char *laddr = (char *) *addr;
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union boothead {
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struct exec ah;
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Elf32_Ehdr eh;
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} *x;
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x = (union boothead *)laddr;
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if (!block_count) {
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printf("bootxx: no data!?!\n");
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return -1;
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}
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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: read 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, laddr, &n)) {
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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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laddr += block_size;
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}
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if (N_GETMAGIC(x->ah) == OMAGIC)
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*addr += sizeof(x->ah);
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else if (memcmp(x->eh.e_ident, ELFMAG, SELFMAG) == 0) {
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Elf32_Phdr *ep = (Elf32_Phdr *)(*addr + x->eh.e_phoff);
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*addr += ep->p_offset;
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} else {
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printf("bootxx: secondary bootstrap isn't an executable\n");
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return -1;
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}
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return 0;
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}
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