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

/*	$NetBSD: machdep.c,v 1.67 2021/03/30 05:08:16 rin Exp $	*/

/*
 * Copyright 2001, 2002 Wasabi Systems, Inc.
 * All rights reserved.
 *
 * Written by Eduardo Horvath and Simon Burge for Wasabi Systems, Inc.
 *
 * 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 for the NetBSD Project by
 *      Wasabi Systems, Inc.
 * 4. The name of Wasabi Systems, Inc. may not be used to endorse
 *    or promote products derived from this software without specific prior
 *    written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``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 WASABI SYSTEMS, INC
 * 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.
 */

/*
 * 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: machdep.c,v 1.67 2021/03/30 05:08:16 rin Exp $");

#include "opt_ddb.h"

#include <sys/param.h>
#include <sys/bus.h>
#include <sys/device.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/reboot.h>
#include <sys/systm.h>

#include <machine/walnut.h>

#include <powerpc/spr.h>
#include <powerpc/ibm4xx/spr.h>

#include <powerpc/ibm4xx/cpu.h>
#include <powerpc/ibm4xx/dcr4xx.h>
#include <powerpc/ibm4xx/ibm405gp.h>
#include <powerpc/ibm4xx/openbios.h>
#include <powerpc/ibm4xx/tlb.h>

#include <powerpc/ibm4xx/pci_machdep.h>
#include <dev/pci/pciconf.h>
#include <dev/pci/pcivar.h>

#define TLB_PG_SIZE 	(16*1024*1024)

void initppc(vaddr_t, vaddr_t, char *, void *);

void
initppc(vaddr_t startkernel, vaddr_t endkernel, char *args, void *info_block)
{
	u_int memsize;

	/* Disable all external interrupts */
	mtdcr(DCR_UIC0_BASE + DCR_UIC_ER, 0);

	/* Setup board from OpenBIOS */
	openbios_board_init(info_block);
	memsize = openbios_board_memsize_get();

	/* Linear map kernel memory */
	for (vaddr_t va = 0; va < endkernel; va += TLB_PG_SIZE) {
		ppc4xx_tlb_reserve(va, va, TLB_PG_SIZE, TLB_EX);
	}

	/* Map console after physmem (see pmap_tlbmiss()) */
	ppc4xx_tlb_reserve(IBM405GP_UART0_BASE, roundup(memsize, TLB_PG_SIZE),
	    TLB_PG_SIZE, TLB_I | TLB_G);

	mtspr(SPR_TCR, 0);	/* disable all timers */

	ibm40x_memsize_init(memsize, startkernel);
	ibm4xx_init(startkernel, endkernel, pic_ext_intr);

#ifdef DEBUG
	openbios_board_print();
#endif

#ifdef DDB
	if (boothowto & RB_KDB)
		Debugger();
#endif

	/*
	 * Look for the ibm4xx modules in the right place.
	 */
	module_machine = module_machine_ibm4xx;
}

/*
 * Machine dependent startup code.
 */

void
cpu_startup(void)
{

	ibm4xx_cpu_startup("Walnut PowerPC 405GP Evaluation Board");

	openbios_board_info_set();

	/*
	 * Now that we have VM, malloc()s are OK in bus_space.
	 */
	bus_space_mallocok();
	fake_mapiodev = 0;
}

int
ibm4xx_pci_bus_maxdevs(void *v, int busno)
{

	/*
	 * Bus number is irrelevant.  Configuration Mechanism 1 is in
	 * use, can have devices 0-32 (i.e. the `normal' range).
	 */
	return 5;
}

int
ibm4xx_pci_intr_map(const struct pci_attach_args *pa, pci_intr_handle_t *ihp)
{
	int pin = pa->pa_intrpin;
	int dev = pa->pa_device;

	if (pin == 0)
		/* No IRQ used. */
		goto bad;

	if (pin > 4) {
		printf("%s: bad interrupt pin %d\n", __func__, pin);
		goto bad;
	}

	/*
	 * We need to map the interrupt pin to the interrupt bit in the UIC
	 * associated with it.  This is highly machine-dependent.
	 */
	switch(dev) {
	case 1:
	case 2:
	case 3:
	case 4:
		*ihp = 27 + dev;
		break;
	default:
		printf("Hmm.. PCI device %d should not exist on this board\n",
			dev);
		goto bad;
	}
	return 0;

bad:
	*ihp = -1;
	return 1;
}

void
ibm4xx_pci_conf_interrupt(void *v, int bus, int dev, int pin, int swiz,
    int *iline)
{

	if (bus == 0) {
		switch(dev) {
		case 1:
		case 2:
		case 3:
		case 4:
			*iline = 31 - dev;
		}
	} else
		*iline = 20 + ((swiz + dev + 1) & 3);
}