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      1 /*	$NetBSD: intr.h,v 1.12 2020/07/27 12:32:54 skrll Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 2001, 2003 Wasabi Systems, Inc.
      5  * All rights reserved.
      6  *
      7  * Written by Jason R. Thorpe for Wasabi Systems, Inc.
      8  *
      9  * Redistribution and use in source and binary forms, with or without
     10  * modification, are permitted provided that the following conditions
     11  * are met:
     12  * 1. Redistributions of source code must retain the above copyright
     13  *    notice, this list of conditions and the following disclaimer.
     14  * 2. Redistributions in binary form must reproduce the above copyright
     15  *    notice, this list of conditions and the following disclaimer in the
     16  *    documentation and/or other materials provided with the distribution.
     17  * 3. All advertising materials mentioning features or use of this software
     18  *    must display the following acknowledgement:
     19  *	This product includes software developed for the NetBSD Project by
     20  *	Wasabi Systems, Inc.
     21  * 4. The name of Wasabi Systems, Inc. may not be used to endorse
     22  *    or promote products derived from this software without specific prior
     23  *    written permission.
     24  *
     25  * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
     26  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     27  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     28  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL WASABI SYSTEMS, INC
     29  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     30  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     31  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     32  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     33  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     34  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     35  * POSSIBILITY OF SUCH DAMAGE.
     36  */
     37 
     38 #ifndef	_IYONIX_INTR_H_
     39 #define	_IYONIX_INTR_H_
     40 
     41 #ifdef _KERNEL
     42 
     43 /* Interrupt priority "levels". */
     44 #define	IPL_NONE	0	/* nothing */
     45 #define	IPL_SOFTCLOCK	1	/* software clock interrupt */
     46 #define	IPL_SOFTBIO	2	/* generic software interrupts */
     47 #define	IPL_SOFTNET	3	/* software network interrupt */
     48 #define	IPL_SOFTSERIAL	4	/* software serial interrupt */
     49 #define	IPL_VM		5	/* memory allocation */
     50 #define	IPL_SCHED	6	/* scheduler */
     51 #define	IPL_HIGH	6	/* everything */
     52 
     53 #define	NIPL		7
     54 
     55 /* Interrupt sharing types. */
     56 #define	IST_NONE	0	/* none */
     57 #define	IST_PULSE	1	/* pulsed */
     58 #define	IST_EDGE	2	/* edge-triggered */
     59 #define	IST_LEVEL	3	/* level-triggered */
     60 
     61 #define IST_LEVEL_LOW	 IST_LEVEL
     62 #define IST_LEVEL_HIGH   4
     63 #define IST_EDGE_FALLING IST_EDGE
     64 #define IST_EDGE_RISING  5
     65 #define IST_EDGE_BOTH    6
     66 
     67 #ifndef _LOCORE
     68 
     69 #if defined(_MODULE)
     70 
     71 int	_splraise(int);
     72 int	_spllower(int);
     73 void	splx(int);
     74 
     75 #else	/* _MODULE */
     76 
     77 #include "opt_arm_intr_impl.h"
     78 
     79 #if defined(ARM_INTR_IMPL)
     80 
     81 /*
     82  * Each board needs to define the following functions:
     83  *
     84  * int	_splraise(int);
     85  * int	_spllower(int);
     86  * void	splx(int);
     87  * void	_setsoftintr(int);
     88  *
     89  * These may be defined as functions, static inline functions, or macros,
     90  * but there must be a _spllower() and splx() defined as functions callable
     91  * from assembly language (for cpu_switch()).  However, since it's quite
     92  * useful to be able to inline splx(), you could do something like the
     93  * following:
     94  *
     95  * in <boardtype>_intr.h:
     96  * 	static inline int
     97  *	boardtype_splx(int spl)
     98  *	{...}
     99  *
    100  *	#define splx(nspl)	boardtype_splx(nspl)
    101  *	...
    102  * and in boardtype's machdep code:
    103  *
    104  *	...
    105  *	#undef splx
    106  *	int
    107  *	splx(int spl)
    108  *	{
    109  *		return boardtype_splx(spl);
    110  *	}
    111  */
    112 
    113 #include ARM_INTR_IMPL
    114 
    115 #else /* ARM_INTR_IMPL */
    116 
    117 #error ARM_INTR_IMPL not defined.
    118 
    119 #endif	/* ARM_INTR_IMPL */
    120 
    121 #endif /* _MODULE */
    122 
    123 typedef uint8_t ipl_t;
    124 typedef struct {
    125 	ipl_t _ipl;
    126 } ipl_cookie_t;
    127 
    128 static inline ipl_cookie_t
    129 makeiplcookie(ipl_t ipl)
    130 {
    131 
    132 	return (ipl_cookie_t){._ipl = ipl};
    133 }
    134 
    135 static inline int
    136 splraiseipl(ipl_cookie_t icookie)
    137 {
    138 
    139 	return _splraise(icookie._ipl);
    140 }
    141 
    142 #define	spl0()		_spllower(IPL_NONE)
    143 
    144 #include <sys/spl.h>
    145 
    146 #endif /* ! _LOCORE */
    147 
    148 #endif /* _KERNEL */
    149 
    150 #endif	/* _IYONIX_INTR_H_ */
    151