/*	$OpenBSD: autoconf.c,v 1.19 2007/06/01 23:14:07 deraadt Exp $	*/
/*
 * Copyright (c) 1996, 1997 Per Fogelstrom
 * Copyright (c) 1995 Theo de Raadt
 * Copyright (c) 1988 University of Utah.
 * Copyright (c) 1992, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * the Systems Programming Group of the University of Utah Computer
 * Science Department and Ralph Campbell.
 *
 * 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. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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.
 *
 * from: Utah Hdr: autoconf.c 1.31 91/01/21
 *
 *	from: @(#)autoconf.c	8.1 (Berkeley) 6/10/93
 *      $Id: autoconf.c,v 1.1 2008/03/04 16:07:46 nbrk Exp $
 */

/*
 * Setup the system to run on the current machine.
 *
 * cpu_configure() is called at boot time.  Available
 * devices are determined (from possibilities mentioned in ioconf.c),
 * and the drivers are initialized.
 */

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/buf.h>
#include <sys/disklabel.h>
#include <sys/conf.h>
#include <sys/reboot.h>
#include <sys/device.h>

#include <machine/autoconf.h>
#include <machine/bugio.h>

extern void	dumpconf(void);
struct device *getdevunit(char *, int);
void calc_delayconst(void);	/* clock.c */

/*
 * The following several variables are related to
 * the configuration process, and are used in initializing
 * the machine.
 */
int	cold = 1;	/* if 1, still working on cold-start */
int	bootdev;	/* boot device as provided by locore */
struct device *bootdv = NULL;

/*
 *  Configure all devices found that we know about.
 *  This is done at boot time.
 */
void
cpu_configure()
{
	(void)splhigh();	/* To be really sure.. */
	calc_delayconst();

	if (config_rootfound("mainbus", "mainbus") == 0)
		panic("no mainbus found");

	ppc_intr_enable(1);
	spl0();

	/*
	 * We can not select the root device yet, because we use bugtty
	 * as the console for now, and it requires the clock to be ticking
	 * for proper operation (think boot -a ...)
	 */
	cold = 0;
}

void
diskconf(void)
{
	printf("boot device: %s\n",
	    (bootdv != NULL) ? bootdv->dv_xname : "<unknown>");
	setroot(bootdv, 0, RB_USERREQ);
#if 0
	dumpconf();
#endif
}

/*
 * Crash dump handling.
 */
u_long dumpmag = 0x8fca0101;		/* magic number */
int dumpsize = 0;			/* size of dump in pages */
long dumplo = -1;			/* blocks */

/*
 * This is called by configure to set dumplo and dumpsize.
 * Dumps always skip the first CLBYTES of disk space
 * in case there might be a disk label stored there.
 * If there is extra space, put dump at the end to
 * reduce the chance that swapping trashes it.
 */
#if 0
void
dumpconf(void)
{
	int nblks;	/* size of dump area */

	if (dumpdev == NODEV ||
	    (nblks = (bdevsw[major(dumpdev)].d_psize)(dumpdev)) == 0)
		return;
	if (nblks <= ctod(1))
		return;

	dumpsize = btoc(IOM_END + ctob(dumpmem_high));

	/* Always skip the first CLBYTES, in case there is a label there. */
	if (dumplo < ctod(1))
		dumplo = ctod(1);

	/* Put dump at end of partition, and make it fit. */
	if (dumpsize > dtoc(nblks - dumplo))
		dumpsize = dtoc(nblks - dumplo);
	if (dumplo < nblks - ctod(dumpsize))
		dumplo = nblks - ctod(dumpsize);
}
#endif

/*
 * find a device matching "name" and unit number
 */
struct device *
getdevunit(name, unit)
	char *name;
	int unit;
{
	struct device *dev = TAILQ_FIRST(&alldevs);
	char num[10], fullname[16];
	int lunit;

	/* compute length of name and decimal expansion of unit number */
	snprintf(num, sizeof num, "%d", unit);
	lunit = strlen(num);
	if (strlen(name) + lunit >= sizeof(fullname) - 1)
		panic("config_attach: device name too long");

	strlcpy(fullname, name, sizeof fullname);
	strlcat(fullname, num, sizeof fullname);

	while (strcmp(dev->dv_xname, fullname) != 0) {
		if ((dev = TAILQ_NEXT(dev, dv_list)) == NULL)
			return NULL;
	}
	return dev;
}

struct nam2blk nam2blk[] = {
	{ "wd",		0 },
	{ "sd",		2 },
	{ "raid",	19 },
	{ NULL,		-1 }
};