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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: rndvar.h,v 1.19 2003/11/03 18:24:28 tedu Exp $	*/

/*
 * Copyright (c) 1996,2000 Michael Shalayeff.
 *
 * This software derived from one contributed by Theodore Ts'o.
 *
 * 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 REGENTS 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 REGENTS 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.
 *
 */

#ifndef __RNDVAR_H__
#define __RNDVAR_H__

#define POOLWORDS 1024	/* Power of 2 - note that this is 32-bit words */

#define	RND_RND		0	/* real randomness like nuclear chips */
#define	RND_SRND	1	/* strong random source */
#define	RND_URND	2	/* less strong random source */
#define	RND_PRND	3	/* pseudo random source */
#define RND_ARND	4	/* aRC4 based random number generator */
#define RND_NODEV	5	/* First invalid minor device number */

#define	RND_SRC_TRUE	0
#define	RND_SRC_TIMER	1
#define	RND_SRC_MOUSE	2
#define	RND_SRC_TTY	3
#define	RND_SRC_DISK	4
#define	RND_SRC_NET	5
#define	RND_SRC_AUDIO	6
#define	RND_SRC_VIDEO	7
#define	RND_SRC_NUM	8

struct rndstats {
	quad_t rnd_total;	/* total bits of entropy generated */
	quad_t rnd_used;	/* strong data bits read so far */
	quad_t rnd_reads;	/* strong read calls */
	quad_t arc4_reads;	/* aRC4 data bytes read so far */
	quad_t arc4_nstirs;	/* arc4 pool stirs */
	quad_t arc4_stirs;	/* arc4 pool stirs (bits used) */

	quad_t rnd_pad[5];

	quad_t rnd_waits;	/* sleeps for data */
	quad_t rnd_enqs;	/* enqueue calls */
	quad_t rnd_deqs;	/* dequeue calls */
	quad_t rnd_drops;	/* queue-full drops */
	quad_t rnd_drople;	/* queue low watermark low entropy drops */

	quad_t rnd_ed[32];	/* entropy feed distribution */
	quad_t rnd_sc[RND_SRC_NUM]; /* add* calls */
	quad_t rnd_sb[RND_SRC_NUM]; /* add* bits */
};

#ifdef _KERNEL
extern struct rndstats rndstats;

#define	add_true_randomness(d)	enqueue_randomness(RND_SRC_TRUE,  (int)(d))
#define	add_timer_randomness(d)	enqueue_randomness(RND_SRC_TIMER, (int)(d))
#define	add_mouse_randomness(d)	enqueue_randomness(RND_SRC_MOUSE, (int)(d))
#define	add_tty_randomness(d)	enqueue_randomness(RND_SRC_TTY,   (int)(d))
#define	add_disk_randomness(d)	enqueue_randomness(RND_SRC_DISK,  (int)(d))
#define	add_net_randomness(d)	enqueue_randomness(RND_SRC_NET,   (int)(d))
#define	add_audio_randomness(d)	enqueue_randomness(RND_SRC_AUDIO, (int)(d))
#define	add_video_randomness(d)	enqueue_randomness(RND_SRC_VIDEO, (int)(d))

void enqueue_randomness(int, int);
void get_random_bytes(void *, size_t);
void arc4random_bytes(void *, size_t);
u_int32_t arc4random(void);

#endif /* _KERNEL */

#endif /* __RNDVAR_H__ */