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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: ip_ipip.h,v 1.5 2002/06/09 16:26:10 itojun Exp $ */
/*
 * The authors of this code are John Ioannidis (ji@tla.org),
 * Angelos D. Keromytis (kermit@csd.uch.gr) and
 * Niels Provos (provos@physnet.uni-hamburg.de).
 *
 * The original version of this code was written by John Ioannidis
 * for BSD/OS in Athens, Greece, in November 1995.
 *
 * Ported to OpenBSD and NetBSD, with additional transforms, in December 1996,
 * by Angelos D. Keromytis.
 *
 * Additional transforms and features in 1997 and 1998 by Angelos D. Keromytis
 * and Niels Provos.
 *
 * Additional features in 1999 by Angelos D. Keromytis.
 *
 * Copyright (C) 1995, 1996, 1997, 1998, 1999 by John Ioannidis,
 * Angelos D. Keromytis and Niels Provos.
 * Copyright (c) 2001, Angelos D. Keromytis.
 *
 * Permission to use, copy, and modify this software with or without fee
 * is hereby granted, provided that this entire notice is included in
 * all copies of any software which is or includes a copy or
 * modification of this software.
 * You may use this code under the GNU public license if you so wish. Please
 * contribute changes back to the authors under this freer than GPL license
 * so that we may further the use of strong encryption without limitations to
 * all.
 *
 * THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR
 * IMPLIED WARRANTY. IN PARTICULAR, NONE OF THE AUTHORS MAKES ANY
 * REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE
 * MERCHANTABILITY OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR
 * PURPOSE.
 */

#ifndef _NETINET_IPIP_H_
#define _NETINET_IPIP_H_

/*
 * IP-inside-IP processing.
 * Not quite all the functionality of RFC-1853, but the main idea is there.
 */

struct ipipstat
{
    u_int32_t	ipips_ipackets;		/* total input packets */
    u_int32_t	ipips_opackets;		/* total output packets */
    u_int32_t	ipips_hdrops;		/* packet shorter than header shows */
    u_int32_t	ipips_qfull;
    u_int64_t   ipips_ibytes;
    u_int64_t   ipips_obytes;
    u_int32_t	ipips_pdrops;		/* packet dropped due to policy */
    u_int32_t	ipips_spoof;		/* IP spoofing attempts */
    u_int32_t   ipips_family;		/* Protocol family mismatch */
    u_int32_t   ipips_unspec;            /* Missing tunnel endpoint address */
};

#define IP4_DEFAULT_TTL    0
#define IP4_SAME_TTL	  -1

/*
 * Names for IPIP sysctl objects
 */
#define	IPIPCTL_ALLOW	1		/* accept incoming IP4 packets */
#define IPIPCTL_MAXID	2

#define IPIPCTL_NAMES { \
	{ 0, 0 }, \
	{ "allow", CTLTYPE_INT }, \
}

#ifdef _KERNEL
int	ipip_sysctl(int *, u_int, void *, size_t *, void *, size_t);

extern int ipip_allow;
extern struct ipipstat ipipstat;
#endif /* _KERNEL */
#endif /* _NETINET_IPIP_H_ */