NetBSD-5.0.2/sys/arch/i386/stand/pxeboot/main.c

/*	$NetBSD: main.c,v 1.15 2008/09/26 14:12:50 christos Exp $	*/

/*
 * Copyright (c) 1996
 * 	Matthias Drochner.  All rights reserved.
 * Copyright (c) 1996
 * 	Perry E. Metzger.  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 acknowledgements:
 *	This product includes software developed for the NetBSD Project
 *	by Matthias Drochner.
 *	This product includes software developed for the NetBSD Project
 *	by Perry E. Metzger.
 * 4. The names of the authors 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/types.h>
#include <sys/reboot.h>
#include <sys/bootblock.h>

#include <lib/libkern/libkern.h>

#include <lib/libsa/stand.h>

#include <libi386.h>
#include "pxeboot.h"
#include "bootmod.h"

extern struct x86_boot_params boot_params;

int errno;
int debug;

extern char	bootprog_name[], bootprog_rev[], bootprog_kernrev[];

int	main(void);

void	command_help __P((char *));
void	command_quit __P((char *));
void	command_boot __P((char *));
void	command_consdev(char *);
void	command_load(char *);
void	command_modules(char *);

const struct bootblk_command commands[] = {
	{ "help",	command_help },
	{ "?",		command_help },
	{ "quit",	command_quit },
	{ "boot",	command_boot },
	{ "consdev",	command_consdev },
	{ "modules",    command_modules },
	{ "load",	command_load },
	{ NULL,		NULL },
};

static int 
bootit(const char *filename, int howto)
{
	if (exec_netbsd(filename, 0, howto, 0) < 0)
		printf("boot: %s\n", strerror(errno));
	else
		printf("boot returned\n");
	return (-1);
}

static void
print_banner(void)
{
	int base = getbasemem();
	int ext = getextmem();

	printf("\n"
	       ">> %s, Revision %s (from NetBSD %s)\n"
	       ">> Memory: %d/%d k\n",
	       bootprog_name, bootprog_rev, bootprog_kernrev,
	       base, ext);
}

int
main(void)
{
        char c;

#ifdef SUPPORT_SERIAL
	initio(SUPPORT_SERIAL);
#else
	initio(CONSDEV_PC);
#endif
	gateA20();

	print_banner();

	printf("Press return to boot now, any other key for boot menu\n");
	printf("Starting in ");

	c = awaitkey(boot_params.bp_timeout, 1);
	if ((c != '\r') && (c != '\n') && (c != '\0')) {
		printf("type \"?\" or \"help\" for help.\n");
		bootmenu();	/* does not return */
	}

	/*
	 * The file name provided here is just a default.  If the
	 * DHCP server provides a file name, we'll use that instead.
	 */
	bootit("netbsd", 0);

	/*
	 * If that fails, let the BIOS try the next boot device.
	 */
	return (1);
}

/* ARGSUSED */
void
command_help(char *arg)
{
	printf("commands are:\n"
	       "boot [filename] [-adsqv]\n"
	       "     (ex. \"netbsd.old -s\"\n"
	       "consdev {pc|com[0123]|com[0123]kbd|auto}\n"
	       "modules {enabled|disabled}\n"
	       "load {path_to_module}\n"
	       "help|?\n"
	       "quit\n");
}

/* ARGSUSED */
void
command_quit(char *arg)
{

	printf("Exiting...\n");
	delay(1000000);
	reboot();
	/* Note: we shouldn't get to this point! */
	panic("Could not reboot!");
	exit(0);
}

void
command_boot(char *arg)
{
	char *filename;
	int howto;

	if (parseboot(arg, &filename, &howto))
		bootit(filename, howto);
}

static const struct cons_devs {
    const char	*name;
    u_int	tag;
} cons_devs[] = {
	{ "pc",		CONSDEV_PC },
	{ "com0",	CONSDEV_COM0 },
	{ "com1",	CONSDEV_COM1 },
	{ "com2",	CONSDEV_COM2 },
	{ "com3",	CONSDEV_COM3 },
	{ "com0kbd",	CONSDEV_COM0KBD },
	{ "com1kbd",	CONSDEV_COM1KBD },
	{ "com2kbd",	CONSDEV_COM2KBD },
	{ "com3kbd",	CONSDEV_COM3KBD },
	{ "auto",	CONSDEV_AUTO },
	{ 0, 0 } };

void
command_consdev(char *arg)
{
	const struct cons_devs *cdp;

	for (cdp = cons_devs; cdp->name; cdp++) {
		if (!strcmp(arg, cdp->name)) {
			initio(cdp->tag);
			print_banner();
			return;
		}
	}
	printf("invalid console device.\n");
}
void
command_modules(char *arg)
{
	if (strcmp(arg, "enabled") == 0 ||
			strcmp(arg, "on") == 0)
		boot_modules_enabled = true;
	else if (strcmp(arg, "disabled") == 0 ||
			strcmp(arg, "off") == 0)
		boot_modules_enabled = false;
	else
		printf("invalid flag, must be 'enabled' or 'disabled'.\n");
}

void
command_load(char *arg)
{
	boot_module_t *bm, *bmp;
	size_t len;
	char *str;
	
	bm = alloc(sizeof(boot_module_t));
	len = strlen(arg) + 1;
	str = alloc(len);
	if (bm == NULL || str == NULL) {
		printf("couldn't allocate module\n");
		return;
	}
	memcpy(str, arg, len);
	bm->bm_path = str;
	bm->bm_next = NULL;
	if (boot_modules == NULL)
		boot_modules = bm;
	else {
		for (bmp = boot_modules; bmp->bm_next;
				bmp = bmp->bm_next)
			;
		bmp->bm_next = bm;
	}
}