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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: param.h,v 1.36 2007/07/15 19:25:49 kettenis Exp $	*/

/* 
 * Copyright (c) 1988-1994, The University of Utah and
 * the Computer Systems Laboratory at the University of Utah (CSL).
 * All rights reserved.
 *
 * Permission to use, copy, modify and distribute this software is hereby
 * granted provided that (1) source code retains these copyright, permission,
 * and disclaimer notices, and (2) redistributions including binaries
 * reproduce the notices in supporting documentation, and (3) all advertising
 * materials mentioning features or use of this software display the following
 * acknowledgement: ``This product includes software developed by the
 * Computer Systems Laboratory at the University of Utah.''
 *
 * THE UNIVERSITY OF UTAH AND CSL ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS
 * IS" CONDITION.  THE UNIVERSITY OF UTAH AND CSL DISCLAIM ANY LIABILITY OF
 * ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
 *
 * CSL requests users of this software to return to csl-dist@cs.utah.edu any
 * improvements that they make and grant CSL redistribution rights.
 *
 * 	Utah $Hdr: param.h 1.18 94/12/16$
 */

#include <machine/cpu.h>
#include <machine/intr.h>

/*
 * Machine dependent constants for PA-RISC.
 */

#define	_MACHINE	hppa
#define	MACHINE		"hppa"
#define	_MACHINE_ARCH	hppa
#define	MACHINE_ARCH	"hppa"
#define	MID_MACHINE	MID_HPUX800

/*
 * Round p (pointer or byte index) up to a correctly-aligned value for all
 * data types (int, long, ...).   The result is u_int and must be cast to
 * any desired pointer type.
 */
#define	ALIGNBYTES	7
#define	ALIGN(p)	(((u_long)(p) + ALIGNBYTES) &~ ALIGNBYTES)
#define	ALIGNED_POINTER(p,t) ((((u_long)(p)) & (sizeof(t) - 1)) == 0)

#define	PAGE_SIZE	4096
#define	PAGE_MASK	(PAGE_SIZE-1)
#define	PAGE_SHIFT	12

#define	NBPG		4096		/* bytes/page */
#define	PGOFSET		(NBPG-1)	/* byte offset into page */
#define	PGSHIFT		12		/* LOG2(NBPG) */

#define	KERNBASE	0x00000000	/* start of kernel virtual */

#define	DEV_BSHIFT	9		/* log2(DEV_BSIZE) */
#define	DEV_BSIZE	(1 << DEV_BSHIFT)
#define BLKDEV_IOSIZE	2048
#define	MAXPHYS		(64 * 1024)	/* max raw I/O transfer size */

#define	MACHINE_STACK_GROWS_UP	1	/* stack grows to higher addresses */

#define	USPACE		(4 * NBPG)	/* pages for user struct and kstack */
#define	USPACE_ALIGN	(0)		/* u-area alignment 0-none */

#ifndef	MSGBUFSIZE
#define	MSGBUFSIZE	2*NBPG		/* default message buffer size */
#endif

/*
 * Constants related to network buffer management.
 * MCLBYTES must be no larger than the software page size, and,
 * on machines that exchange pages of input or output buffers with mbuf
 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple
 * of the hardware page size.
 */
#define	MSIZE		256		/* size of an mbuf */
#define	MCLSHIFT	11
#define	MCLBYTES	(1 << MCLSHIFT)	/* large enough for ether MTU */
#define	MCLOFSET	(MCLBYTES - 1)
#define	NMBCLUSTERS	4096		/* map size, max cluster allocation */

/*
 * Minimum and maximum sizes of the kernel malloc arena in PAGE_SIZE-sized
 * logical pages.
 */
#define	NKMEMPAGES_MIN_DEFAULT	((4 * 1024 * 1024) >> PAGE_SHIFT)
#define	NKMEMPAGES_MAX_DEFAULT	((128 * 1024 * 1024) >> PAGE_SHIFT)

/* pages ("clicks") (4096 bytes) to disk blocks */
#define	ctod(x)		((x) << (PGSHIFT - DEV_BSHIFT))
#define	dtoc(x)		((x) >> (PGSHIFT - DEV_BSHIFT))

/* pages to bytes */
#define	ctob(x)		((x) << PGSHIFT)
#define	btoc(x)		(((x) + PGOFSET) >> PGSHIFT)

#define	btodb(x)	((x) >> DEV_BSHIFT)
#define	dbtob(x)	((x) << DEV_BSHIFT)

#ifdef _KERNEL
#ifdef COMPAT_HPUX
/*
 * Constants/macros for HPUX multiple mapping of user address space.
 * Pages in the first 256Mb are mapped in at every 256Mb segment.
 */
#define HPMMMASK	0xF0000000
#define ISHPMMADDR(v)	0		/* XXX ...jef */
#define HPMMBASEADDR(v)	((unsigned)(v) & ~HPMMMASK)
#endif
#endif

#define	__SWAP_BROKEN