/*      $NetBSD: intr.h,v 1.12 2021/06/05 21:24:17 christos Exp $       */

/*
 * Copyright (c) 2001, 2003 Wasabi Systems, Inc.
 * All rights reserved.
 *
 * Written by Jason R. Thorpe for Wasabi Systems, 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 for the NetBSD Project by
 *      Wasabi Systems, Inc.
 * 4. The name of Wasabi Systems, Inc. may not be used to endorse
 *    or promote products derived from this software without specific prior
 *    written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``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 WASABI SYSTEMS, INC
 * 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 _ZAURUS_INTR_H_
#define _ZAURUS_INTR_H_

#ifdef _KERNEL

/* Interrupt priority "levels". */
#define IPL_NONE        0       /* nothing */
#define IPL_SOFTCLOCK   1       /* timeouts */
#define IPL_SOFTBIO     2       /* block I/O */
#define IPL_SOFTNET     3       /* software network interrupt */
#define IPL_SOFTSERIAL  4       /* software serial interrupt */
#define IPL_VM          5       /* memory allocation */
#define IPL_SCHED       6       /* clock interrupt */
#define IPL_HIGH        7       /* everything */

#define NIPL            8

/* 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 */

#define IST_LEVEL_LOW    IST_LEVEL
#define IST_LEVEL_HIGH   4
#define IST_EDGE_FALLING IST_EDGE
#define IST_EDGE_RISING  5
#define IST_EDGE_BOTH    6

#ifndef _LOCORE

#include <sys/queue.h>

#if defined(_MODULE)

int     _splraise(int);
int     _spllower(int);
void    splx(int);

#else   /* _MODULE */

#include "opt_arm_intr_impl.h"

#if defined(ARM_INTR_IMPL)

/*
 * Each board needs to define the following functions:
 *
 * int  _splraise(int);
 * int  _spllower(int);
 * void splx(int);
 *
 * These may be defined as functions, static inline functions, or macros,
 * but there must be a _spllower() and splx() defined as functions callable
 * from assembly language (for cpu_switch()).  However, since it's quite
 * useful to be able to inline splx(), you could do something like the
 * following:
 *
 * in <boardtype>_intr.h:
 *      static inline int
 *      boardtype_splx(int spl)
 *      {...}
 *
 *      #define splx(nspl)      boardtype_splx(nspl)
 *      ...
 * and in boardtype's machdep code:
 *
 *      ...
 *      #undef splx
 *      int
 *      splx(int spl)
 *      {
 *              return boardtype_splx(spl);
 *      }
 */

#include ARM_INTR_IMPL

#else /* ARM_INTR_IMPL */

#error ARM_INTR_IMPL not defined.

#endif  /* ARM_INTR_IMPL */

#endif /* _MODULE */

typedef uint8_t 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(icookie._ipl);
}

#define spl0()          _spllower(IPL_NONE)

#include <sys/spl.h>

#endif /* ! _LOCORE */

#endif /* _KERNEL */

#endif  /* _ZAURUS_INTR_H_ */