/*	$NetBSD: intr.h,v 1.25 2007/07/14 21:48:21 ad Exp $	*/

/*-
 * Copyright (c) 1998 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Charles M. Hannum.
 *
 * 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 NetBSD
 *        Foundation, Inc. and its contributors.
 * 4. Neither the name of The NetBSD Foundation 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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 _MACPPC_INTR_H_
#define _MACPPC_INTR_H_

#ifdef _KERNEL_OPT
#include "opt_multiprocessor.h"
#endif

/* Interrupt priority `levels'. */
#define	IPL_NONE	9	/* nothing */
#define	IPL_SOFTCLOCK	8	/* timeouts */
#define	IPL_SOFTNET	7	/* protocol stacks */
#define	IPL_BIO		6	/* block I/O */
#define	IPL_NET		5	/* network */
#define	IPL_SOFTSERIAL	4	/* serial */
#define	IPL_TTY		3	/* terminal */
#define	IPL_LPT		IPL_TTY
#define	IPL_VM		3	/* memory allocation */
#define	IPL_AUDIO	2	/* audio */
#define	IPL_CLOCK	1	/* clock */
#define	IPL_STATCLOCK	IPL_CLOCK
#define	IPL_HIGH	1	/* everything */
#define	IPL_SCHED	IPL_HIGH
#define	IPL_LOCK	IPL_HIGH
#define	IPL_SERIAL	0	/* serial */
#define	NIPL		10

/* Interrupt sharing types. */
#define	IST_NONE	0	/* none */
#define	IST_PULSE	1	/* pulsed */
#define	IST_EDGE	2	/* edge-triggered */
#define	IST_LEVEL	3	/* level-triggered */

#ifndef _LOCORE
#include <powerpc/softintr.h>

/*
 * Interrupt handler chains.  intr_establish() inserts a handler into
 * the list.  The handler is called with its (single) argument.
 */
struct intrhand {
	int	(*ih_fun) __P((void *));
	void	*ih_arg;
	struct	intrhand *ih_next;
	int	ih_level;
	int	ih_irq;
};

void softnet __P((int));
void softserial __P((void));

int splraise __P((int));
int spllower __P((int));
void splx __P((int));
void softintr __P((int));

extern volatile int astpending, tickspending;
extern int imask[];

#define ICU_LEN		64

/* Soft interrupt masks. */
#define SIR_CLOCK	28
#define SIR_NET		29
#define SIR_SERIAL	30
#define SPL_CLOCK	31

/*
 * Miscellaneous
 */
#define	spl0()		spllower(0)

#define	setsoftclock()	softintr(SIR_CLOCK)
#define	setsoftnet()	softintr(SIR_NET)
#define	setsoftserial()	softintr(SIR_SERIAL)

typedef int ipl_t;
typedef struct {
	ipl_t _ipl;
} ipl_cookie_t;

static inline ipl_cookie_t
makeiplcookie(ipl_t ipl)
{

	return (ipl_cookie_t){._ipl = ipl};
}

static inline int
splraiseipl(ipl_cookie_t icookie)
{

	return splraise(imask[icookie._ipl]);
}

#include <sys/spl.h>

#ifdef MULTIPROCESSOR
#define MACPPC_IPI_HALT		0x0001
#define MACPPC_IPI_FLUSH_FPU	0x0002
#define MACPPC_IPI_FLUSH_VEC	0x0004

struct cpu_info;
void macppc_send_ipi(volatile struct cpu_info *, u_long);
#endif

#endif /* _LOCORE */

#endif /* _MACPPC_INTR_H_ */