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      1 /* $NetBSD: intr.h,v 1.2 2018/04/19 21:50:07 christos Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 2014 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Matt Thomas of 3am Software Foundry.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #ifndef _OR1K_INTR_H_
     33 #define _OR1K_INTR_H_
     34 
     35 #ifdef _LOCORE
     36 #error use "assym.h"
     37 #endif
     38 
     39 #ifdef _KERNEL
     40 
     41 #ifdef _KERNEL_OPT
     42 #include "opt_multiprocessor.h"
     43 #endif
     44 
     45 #ifdef MULTIPROCESSOR
     46 #define __HAVE_PREEMPTION	1
     47 #endif
     48 
     49 /* Interrupt priority "levels". */
     50 #define	IPL_NONE	0		/* nothing */
     51 #define	IPL_SOFTCLOCK	1		/* clock */
     52 #define	IPL_SOFTBIO	2		/* block I/O */
     53 #define	IPL_SOFTNET	3		/* software network interrupt */
     54 #define	IPL_SOFTSERIAL	4		/* software serial interrupt */
     55 #define	IPL_VM		5		/* memory allocation */
     56 #define	IPL_SCHED	6		/* clock interrupt */
     57 #define	IPL_HIGH	7		/* everything */
     58 
     59 #define	NIPL		8
     60 
     61 /* Interrupt sharing types. */
     62 #define	IST_NONE	0	/* none */
     63 #define	IST_PULSE	1	/* pulsed */
     64 #define	IST_EDGE	2	/* edge-triggered */
     65 #define	IST_LEVEL	3	/* level-triggered */
     66 
     67 #define IST_LEVEL_LOW	IST_LEVEL
     68 #define IST_LEVEL_HIGH	4
     69 #define IST_EDGE_FALLING IST_EDGE
     70 #define IST_EDGE_RISING	5
     71 #define IST_EDGE_BOTH	6
     72 #define IST_SOFT	7
     73 
     74 #include <or1k/pic/picvar.h>
     75 
     76 static __inline void
     77 spl0(void)
     78 {
     79 	(void)_spllower(IPL_NONE);
     80 }
     81 
     82 static __inline int
     83 splsoftclock(void)
     84 {
     85 	return _splraise(IPL_SOFTCLOCK);
     86 }
     87 
     88 static __inline int
     89 splsoftbio(void)
     90 {
     91 	return _splraise(IPL_SOFTBIO);
     92 }
     93 
     94 static __inline int
     95 splsoftnet(void)
     96 {
     97 	return _splraise(IPL_SOFTNET);
     98 }
     99 
    100 static __inline int
    101 splsoftserial(void)
    102 {
    103 	return _splraise(IPL_SOFTSERIAL);
    104 }
    105 
    106 static __inline int
    107 splvm(void)
    108 {
    109 	return _splraise(IPL_VM);
    110 }
    111 
    112 static __inline int
    113 splsched(void)
    114 {
    115 	return _splraise(IPL_SCHED);
    116 }
    117 
    118 static __inline int
    119 splhigh(void)
    120 {
    121 	return _splraise(IPL_HIGH);
    122 }
    123 
    124 typedef uint8_t ipl_t;
    125 typedef struct {
    126 	ipl_t _ipl;
    127 } ipl_cookie_t;
    128 
    129 static __inline ipl_cookie_t
    130 makeiplcookie(ipl_t ipl)
    131 {
    132 
    133 	return (ipl_cookie_t){._ipl = ipl};
    134 }
    135 
    136 static __inline int
    137 splraiseipl(ipl_cookie_t icookie)
    138 {
    139 
    140 	return _splraise(icookie._ipl);
    141 }
    142 
    143 #endif /* _KERNEL */
    144 
    145 #endif /* _OR1K_INTR_H_ */
    146