NetBSD/sys/arch/next68k/stand/boot/boot.c

95 lines
3.0 KiB
C

/* $NetBSD: boot.c,v 1.3 2000/07/21 22:26:19 jdolecek Exp $ */
/*
* Copyright (c) 1994 Rolf Grossmann
* 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 Rolf Grossmann.
* 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.
*/
#include <sys/param.h>
#include <sys/reboot.h>
#include <lib/libsa/stand.h>
#include <lib/libkern/libkern.h>
#include <machine/cpu.h> /* for NEXT_RAMBASE */
#define LOADADDR (char *)NEXT_RAMBASE
extern int errno;
/*
* Boot device is derived from PROM provided information.
*/
extern char *bootprog_rev;
extern char *bootprog_name;
extern int build;
#define KNAMEN 100
char kernel[KNAMEN];
char *entry_point; /* return value filled in by machdep_start */
extern void rtc_init(void);
extern int try_bootp;
char *
main(char *boot_arg)
{
printf(">> %s BOOT [%s #%d]\n", bootprog_name, bootprog_rev, build);
rtc_init();
try_bootp = 1;
#if 0
printf("Press return to continue.\n");
getchar();
#endif
strcpy(kernel, boot_arg);
entry_point = NULL;
while (1) {
errno = 0;
exec(kernel, LOADADDR, 0);
if (errno == ENOEXEC && entry_point != NULL) {
printf("Kernel loaded at 0x%lx\n",(unsigned long)entry_point);
#if 0
printf("Press return to continue.\n");
getchar();
#endif
return entry_point;
}
printf("load of %s: %s\n", kernel, strerror(errno));
printf("boot: ");
gets(kernel);
/* XXX we have to write this back into boot_arg or even mg->boot* */
if (kernel[0] == '\0')
return NULL;
}
}