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intr.h revision 1.5 
      1 /*	$NetBSD: intr.h,v 1.5 2000/09/19 19:31:34 scw Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2000 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Jason R. Thorpe and Steve C. Woodford.
      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  * 3. All advertising materials mentioning features or use of this software
     19  *    must display the following acknowledgement:
     20  *        This product includes software developed by the NetBSD
     21  *        Foundation, Inc. and its contributors.
     22  * 4. Neither the name of The NetBSD Foundation nor the names of its
     23  *    contributors may be used to endorse or promote products derived
     24  *    from this software without specific prior written permission.
     25  *
     26  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     27  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     28  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     29  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     30  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     31  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     32  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     33  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     34  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     35  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     36  * POSSIBILITY OF SUCH DAMAGE.
     37  */
     38 
     39 #ifndef _MVME68K_INTR_H
     40 #define _MVME68K_INTR_H
     41 
     42 #include <sys/device.h>
     43 #include <sys/queue.h>
     44 #include <machine/psl.h>
     45 
     46 /*
     47  * These are identical to the values used by hp300, but are not meaningful
     48  * to mvme68k code at this time.
     49  */
     50 #define	IPL_NONE	0	/* disable only this interrupt */
     51 #define	IPL_BIO		1	/* disable block I/O interrupts */
     52 #define	IPL_NET		2	/* disable network interrupts */
     53 #define	IPL_TTY		3	/* disable terminal interrupts */
     54 #define	IPL_TTYNOBUF	4	/* IPL_TTY + higher ISR priority */
     55 #define	IPL_SERIAL	4	/* disable serial interrupts */
     56 #define	IPL_CLOCK	5	/* disable clock interrupts */
     57 #define	IPL_HIGH	6	/* disable all interrupts */
     58 
     59 /* Copied from alpha/include/intr.h */
     60 #define	IPL_SOFTSERIAL	0	/* serial software interrupts */
     61 #define	IPL_SOFTNET	1	/* network software interrupts */
     62 #define	IPL_SOFTCLOCK	2	/* clock software interrupts */
     63 #define	IPL_SOFT	3	/* other software interrupts */
     64 #define	IPL_NSOFT	4
     65 
     66 #define	IPL_SOFTNAMES {							\
     67 	"serial",							\
     68 	"net",								\
     69 	"clock",							\
     70 	"misc",								\
     71 }
     72 
     73 #ifdef _KERNEL
     74 /* spl0 requires checking for software interrupts */
     75 
     76 #define spllowersoftclock()	spl1()
     77 #define splsoft()		splraise1()
     78 #define splsoftclock()		splsoft()
     79 #define splsoftnet()		splsoft()
     80 #define splsoftserial()		splsoft()
     81 #define splbio()		splraise2()
     82 #define splnet()		splraise3()
     83 #define spltty()		splraise3()
     84 #define splimp()		splraise3()
     85 #define splserial()		splraise4()
     86 #define splclock()		splraise5()
     87 #define splstatclock()		splraise5()
     88 #define splvm()			splraise5()
     89 #define splhigh()		spl7()
     90 #define splsched()		spl7()
     91 #define spllock()		spl7()
     92 
     93 /* watch out for side effects */
     94 #define splx(s)         (s & PSL_IPL ? _spl(s) : spl0())
     95 
     96 
     97 #ifndef _LOCORE
     98 /*
     99  * Simulated software interrupt register
    100  * This is cleared to zero to indicate a soft interrupt is pending
    101  * (Yes, it's a bit bizarre, but it allows the use of the m68k's `tas'
    102  * instruction so we can avoid masking interrupts elsewhere.)
    103  */
    104 extern volatile unsigned char ssir;
    105 #define setsoft(x)		x = 0
    106 
    107 #define __GENERIC_SOFT_INTERRUPTS
    108 struct mvme68k_soft_intrhand {
    109 	LIST_ENTRY(mvme68k_soft_intrhand) sih_q;
    110 	struct mvme68k_soft_intr *sih_intrhead;
    111 	void (*sih_fn)(void *);
    112 	void *sih_arg;
    113 	volatile int sih_pending;
    114 };
    115 
    116 struct mvme68k_soft_intr {
    117 	LIST_HEAD(, mvme68k_soft_intrhand) msi_q;
    118 	struct evcnt msi_evcnt;
    119 	volatile unsigned char msi_ssir;
    120 };
    121 
    122 void	*softintr_establish(int, void (*)(void *), void *);
    123 void	softintr_disestablish(void *);
    124 void	softintr_init(void);
    125 void	softintr_dispatch(void);
    126 
    127 #define softintr_schedule(arg)						\
    128 		do {							\
    129 			struct mvme68k_soft_intrhand *__sih = (arg);	\
    130 			__sih->sih_pending = 1;				\
    131 			setsoft(__sih->sih_intrhead->msi_ssir);		\
    132 			setsoft(ssir);					\
    133 		} while (0)
    134 
    135 /* XXX For legacy software interrupts */
    136 extern struct mvme68k_soft_intrhand *softnet_intrhand;
    137 extern struct mvme68k_soft_intrhand *softclock_intrhand;
    138 
    139 #define setsoftnet()	softintr_schedule(softnet_intrhand)
    140 #define setsoftclock()	softintr_schedule(softclock_intrhand)
    141 
    142 extern int spl0 __P((void));
    143 #endif /* !_LOCORE */
    144 #endif /* _KERNEL */
    145 
    146 #endif /* _MVME68K_INTR_H */
    147