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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: pciide.c,v 1.3 2006/07/30 20:46:30 drahn Exp $	*/
/*	$NetBSD: pciide.c,v 1.5 2005/12/11 12:17:06 christos Exp $	*/

/*-
 * Copyright (c) 2003 The NetBSD Foundation, Inc.
 * 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 the NetBSD
 *        Foundation, Inc. and its contributors.
 * 4. Neither the name of The NetBSD Foundation 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
 */

#include <sys/types.h>

#include "libsa.h"
#include "wdvar.h"

u_int32_t wdc_base_addr = 0;

int
pciide_init(struct wdc_channel *chp, u_int chan)
{
	u_int32_t cmdreg, ctlreg;
	int i;

	/*
	 * two channels per chip, one drive per channel
	 */
	if (chan >= PCIIDE_NUM_CHANNELS || wdc_base_addr == 0)
		return (ENXIO);
	chp->ndrives = 1;

	DPRINTF(("[pciide] channel: %d\n", chan));

	/*
	 * XXX map?
	 */
	cmdreg = wdc_base_addr + chan * 0x10;
	ctlreg = wdc_base_addr+0x8 + chan * 0x10;

	/* set up cmd regsiters */
	chp->c_cmdbase = (u_int8_t *)cmdreg;
	chp->c_data = (u_int16_t *)(cmdreg + wd_data);
	for (i = 0; i < WDC_NPORTS; i++)
		chp->c_cmdreg[i] = chp->c_cmdbase + i;
	/* set up shadow registers */
	chp->c_cmdreg[wd_status]   = chp->c_cmdreg[wd_command];
	chp->c_cmdreg[wd_features] = chp->c_cmdreg[wd_precomp];
	/* set up ctl registers */
	chp->c_ctlbase = (u_int8_t *)ctlreg;

	return (0);
}