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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: exception.h,v 1.5 2007/04/24 16:47:34 miod Exp $ */

/*
 * Copyright (c) 1998-2003 Opsycon AB (www.opsycon.se)
 *
 * 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.
 *
 */

/*
 *  Definitions for exception processing.
 */

#ifndef _MIPS_EXCEPTION_H_
#define _MIPS_EXCEPTION_H_

/*
 *  Exception codes.
 */

#define	EX_INT		0	/* Interrupt */
#define	EX_MOD		1	/* TLB Modification */
#define	EX_TLBL		2	/* TLB exception, load or i-fetch */
#define	EX_TLBS		3	/* TLB exception, store */
#define	EX_ADEL		4	/* Address error exception, load or i-fetch */
#define	EX_ADES		5	/* Address error exception, store */
#define	EX_IBE		6	/* Bus error exception, i-fetch */
#define	EX_DBE		7	/* Bus error exception, data reference */
#define	EX_SYS		8	/* Syscall exception */
#define	EX_BP		9	/* Breakpoint exception */
#define	EX_RI		10	/* Reserved instruction exception */
#define	EX_CPU		11	/* Coprocessor unusable exception */
#define	EX_OV		12	/* Arithmetic overflow exception */
#define	EX_TR		13	/* Trap exception */
#define	EX_VCEI		14	/* Virtual coherency exception instruction */
#define	EX_FPE		15	/* Floating point exception */
#define	EX_WATCH	23	/* Reference to watch/hi/watch/lo address */
#define	EX_VCED		31	/* Virtual coherency exception data */

#define	EX_U		32	/* Exception from user mode (SW flag) */

#if defined(DDB) || defined(DEBUG)
#define EX_SIZE	10
struct ex_debug {
	u_int	ex_status;
	u_int	ex_cause;
	u_int	ex_badaddr;
	u_int	ex_pc;
	u_int	ex_ra;
	u_int	ex_sp;
	u_int	ex_code;
} ex_debug[EX_SIZE], *exp = ex_debug;

#endif
#endif /* !_MIPS_EXCEPTION_H_ */