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Import of OpenBSD 4.2 release kernel tree with initial code to support 
Jornada 720/728, StrongARM 1110-based handheld PC.
At this point kernel roots on NFS and boots into vfs_mountroot() and traps.
What is supported:
- glass console, Jornada framebuffer (jfb) works in 16bpp direct color mode
(needs some palette tweaks for non black/white/blue colors, i think)
- saic, SA11x0 interrupt controller (needs cleanup)
- sacom, SA11x0 UART (supported only as boot console for now)
- SA11x0 GPIO controller fully supported (but can't handle multiple interrupt
handlers on one gpio pin)
- sassp, SSP port on SA11x0 that attaches spibus
- Jornada microcontroller (jmcu) to control kbd, battery, etc throught
the SPI bus (wskbd attaches on jmcu, but not tested)
- tod functions seem work
- initial code for SA-1111 (chip companion) : this is TODO

Next important steps, i think:
- gpio and intc on sa1111
- pcmcia support for sa11x0 (and sa1111 help logic)
- REAL root on nfs when we have PCMCIA support (we may use any of supported pccard NICs)
- root on wd0! (using already supported PCMCIA-ATA)

/*	$OpenBSD: vmel.c,v 1.16 2005/11/25 22:14:32 miod Exp $ */

/*
 * Copyright (c) 1995 Theo de Raadt
 * 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.
 *
 * 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/proc.h>
#include <sys/user.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/device.h>

#include <machine/autoconf.h>
#include <machine/conf.h>
#include <machine/cpu.h>

#include <mvme88k/dev/vme.h>

/*
 * The VMEL driver deals with D32 transfers on the VME bus. The number
 * of address bits (A16, A24, A32) is irrelevant since the mapping
 * functions will decide how many address bits are relevant.
 */

void	vmelattach(struct device *, struct device *, void *);
int	vmelmatch(struct device *, void *, void *);
int	vmelscan(struct device *, void *, void *);

struct cfattach vmel_ca = {
        sizeof(struct device), vmelmatch, vmelattach
};

struct cfdriver vmel_cd = {
        NULL, "vmel", DV_DULL
};

int
vmelmatch(parent, cf, args)
	struct device *parent;
	void *cf, *args;
{
	return (1);
}

int
vmelscan(parent, child, args)
	struct device *parent;
	void *child, *args;
{
	return (vmescan(parent, child, args, BUS_VMEL));
}

void
vmelattach(parent, self, args)
	struct device *parent, *self;
	void *args;
{
	printf("\n");

	config_search(vmelscan, self, args);
}

/*ARGSUSED*/
int
vmelopen(dev, flag, mode, p)
	dev_t dev;
	int flag, mode;
	struct proc *p;
{
	if (minor(dev) >= vmel_cd.cd_ndevs ||
	    vmel_cd.cd_devs[minor(dev)] == NULL)
		return (ENODEV);
	return (0);
}

/*ARGSUSED*/
int
vmelclose(dev, flag, mode, p)
	dev_t dev;
	int flag, mode;
	struct proc *p;
{

	return (0);
}

/*ARGSUSED*/
int
vmelioctl(dev, cmd, data, flag, p)
	dev_t dev;
	u_long cmd;
	caddr_t data;
	int flag;
	struct proc *p;
{
	int error = 0;

	switch (cmd) {
	default:
		error = ENOTTY;
		break;
	}
	return (error);
}

int
vmelread(dev, uio, flags)
	dev_t dev;
	struct uio *uio;
	int flags;
{
	int unit = minor(dev);
	struct device *sc = (struct device *)vmel_cd.cd_devs[unit];

	return (vmerw(sc->dv_parent, uio, flags, BUS_VMEL));
}

int
vmelwrite(dev, uio, flags)
	dev_t dev;
	struct uio *uio;
	int flags;
{
	int unit = minor(dev);
	struct device *sc = (struct device *)vmel_cd.cd_devs[unit];

	return (vmerw(sc->dv_parent, uio, flags, BUS_VMEL));
}

paddr_t
vmelmmap(dev, off, prot)
	dev_t dev;
	off_t off;
	int prot;
{
	int unit = minor(dev);
	struct device *sc = (struct device *)vmel_cd.cd_devs[unit];
	paddr_t pa;

	pa = vmepmap(sc->dv_parent, off, BUS_VMEL);
#ifdef DEBUG
	printf("vmel %llx pa %p\n", off, pa);
#endif
	if (pa == NULL)
		return (-1);
	return (atop(pa));
}