cpu.h

早期freebsd实现

/*
 * Copyright (c) 1986, 1988 The Regents of the University of California.
 * All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Computer Consoles Inc.
 *
 * 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 University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University 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 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.
 *
 *	@(#)cpu.h	7.4 (Berkeley) 2/20/92
 */

/*
 * Assorted definitions unique to TAHOE CPU support.
 */

#define	uncache(v)	mtpr(PDCS, (caddr_t)(v))
#define	movow(a,w)	_movow((u_short *)(a), (u_short)(w))
#define	movob(a,b)	_movob((u_char *)(a), (u_char)(b))

#define	resettodr()	/* no todr to set */

#define	MAXCKEY	255		/* maximal allowed code key */
#define	MAXDKEY	255		/* maximal allowed data key */
#define	NCKEY	(MAXCKEY+1)	/* # code keys, including 0 (reserved) */
#define	NDKEY	(MAXDKEY+1)	/* # data keys, including 0 (reserved) */

#ifndef LOCORE
#ifdef KERNEL
char	ckey_cache[NCKEY];	/* 1 =>'s key i may be in code cache */
short	ckey_cnt[NCKEY];	/* code key reference count */
char	dkey_cache[NDKEY];	/* 1 =>'s key i may be in data cache */
short	dkey_cnt[NDKEY];	/* data key reference count */
#endif

/*
 * Statistics maintained for code and
 * data cache key allocations algorithms.
 */
struct	keystats {
	long	ks_avail;	/* number of keys currently unallocated */
	long	ks_dirty;	/* number of keys currently waiting for purge */
	long	ks_allocs;	/* number of keys allocated */
	long	ks_allocfree;	/* key allocated from free slot */
	long	ks_norefs;	/* key marked in use, but refcnt 0 */
	long	ks_taken;	/* key taken from single process */
	long	ks_shared;	/* key taken from multiple processes */
	long	ks_inval;	/* number of times keys exchanged */
};
#endif

long	*user_psl;		/* user mode psl for ast's */
int	intenable;		/* interrupts enable startup flag */
int	clk_enable;		/* clock enable startup flag */

/*
 * Enable realtime clock.
 */
#define	enablertclock()	(clk_enable = 1)

#ifndef _MTPR_H_
#include "mtpr.h"
#endif /* !_MTPR_H_ */