xref: /src/sys/arch/evbppc/walnut/autoconf.c

/*	$NetBSD: autoconf.c,v 1.21 2012/07/29 18:05:42 mlelstv Exp $	*/

/*
 * Copyright (C) 1995, 1996 Wolfgang Solfrank.
 * Copyright (C) 1995, 1996 TooLs GmbH.
 * 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 TooLs GmbH.
 * 4. The name of TooLs GmbH may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``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 TOOLS GMBH 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/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: autoconf.c,v 1.21 2012/07/29 18:05:42 mlelstv Exp $");

#include <sys/param.h>
#include <sys/conf.h>
#include <sys/device.h>
#include <sys/systm.h>
#include <sys/cpu.h>

#include <dev/ic/comreg.h>	/* For COM_FREQ */

#include <powerpc/ibm4xx/cpu.h>
#include <powerpc/ibm4xx/dcr4xx.h>
#include <powerpc/ibm4xx/dev/plbvar.h>
#include <powerpc/ibm4xx/spr.h>

/*
 * List of port-specific devices to attach to the processor local bus.
 */
static const struct plb_dev local_plb_devs [] = {
	{ IBM405GP, "pbus", },
	{ 0, NULL }
};

/*
 * Determine device configuration for a machine.
 */
void
cpu_configure(void)
{

	intr_init();
	calc_delayconst();

	/* Make sure that timers run at CPU frequency */
	mtdcr(DCR_CPC0_CR1, mfdcr(DCR_CPC0_CR1) & ~CPC0_CR1_CETE);

	if (config_rootfound("plb", &local_plb_devs) == NULL)
		panic("configure: plb not configured");

	(void)spl0();
}

/*
 * Setup root device.
 * Configure swap area.
 */
void
cpu_rootconf(void)
{

	rootconf();
}

void
device_register(device_t dev, void *aux)
{
	device_t parent = device_parent(dev);

	if (device_is_a(dev, "com") && device_is_a(parent, "opb")) {
		/* Set the frequency of the on-chip UART. */
		prop_number_t pn = prop_number_create_integer(COM_FREQ * 6);
		KASSERT(pn != NULL);

		if (prop_dictionary_set(device_properties(dev),
					"clock-frequency", pn) == false) {
			printf("WARNING: unable to set clock-frequency "
			    "property for %s\n", device_xname(dev));
		}
		prop_object_release(pn);
		return;
	}

	ibm4xx_device_register(dev, aux);
}