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intr.h revision 1.22 
      1 /*	$NetBSD: intr.h,v 1.22 2006/01/24 23:51:42 uwe Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2002 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  * 3. All advertising materials mentioning features or use of this software
     16  *    must display the following acknowledgement:
     17  *        This product includes software developed by the NetBSD
     18  *        Foundation, Inc. and its contributors.
     19  * 4. Neither the name of The NetBSD Foundation nor the names of its
     20  *    contributors may be used to endorse or promote products derived
     21  *    from this software without specific prior written permission.
     22  *
     23  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     24  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     25  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     26  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     27  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     28  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     29  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     30  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     31  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     32  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     33  * POSSIBILITY OF SUCH DAMAGE.
     34  */
     35 
     36 #ifndef _SH3_INTR_H_
     37 #define	_SH3_INTR_H_
     38 
     39 #include <sys/device.h>
     40 #include <sys/lock.h>
     41 #include <sys/queue.h>
     42 #include <sh3/psl.h>
     43 
     44 /* Interrupt sharing types. */
     45 #define	IST_NONE		0	/* none */
     46 #define	IST_PULSE		1	/* pulsed */
     47 #define	IST_EDGE		2	/* edge-triggered */
     48 #define	IST_LEVEL		3	/* level-triggered */
     49 
     50 /* Interrupt priority levels */
     51 #define	_IPL_N		15
     52 #define	_IPL_NSOFT	4
     53 
     54 #define	IPL_NONE	0	/* nothing */
     55 #define	IPL_SOFT	1
     56 #define	IPL_SOFTCLOCK	2	/* timeouts */
     57 #define	IPL_SOFTNET	3	/* protocol stacks */
     58 #define	IPL_SOFTSERIAL	4	/* serial */
     59 
     60 #define	IPL_SOFTNAMES {							\
     61 	"misc",								\
     62 	"clock",							\
     63 	"net",								\
     64 	"serial",							\
     65 }
     66 
     67 struct intc_intrhand {
     68 	int	(*ih_func)(void *);
     69 	void	*ih_arg;
     70 	int	ih_level;	/* SR.I[0:3] value */
     71 	int	ih_evtcode;	/* INTEVT or INTEVT2(SH7709/SH7709A) */
     72 	int	ih_idx;		/* evtcode -> intrhand mapping */
     73 };
     74 
     75 /* from 0x200 by 0x20 -> from 0 by 1 */
     76 #define	EVTCODE_TO_MAP_INDEX(x)		(((x) >> 5) - 0x10)
     77 #define	EVTCODE_TO_IH_INDEX(x)						\
     78 	__intc_evtcode_to_ih[EVTCODE_TO_MAP_INDEX(x)]
     79 #define	EVTCODE_IH(x)	(&__intc_intrhand[EVTCODE_TO_IH_INDEX(x)])
     80 extern int8_t __intc_evtcode_to_ih[];
     81 extern struct intc_intrhand __intc_intrhand[];
     82 
     83 void intc_init(void);
     84 void *intc_intr_establish(int, int, int, int (*)(void *), void *);
     85 void intc_intr_disestablish(void *);
     86 void intc_intr_enable(int);
     87 void intc_intr_disable(int);
     88 void intc_intr(int, int, int);
     89 
     90 void intpri_intr_priority(int evtcode, int level);
     91 
     92 /*
     93  * software simulated interrupt
     94  */
     95 struct sh_soft_intrhand {
     96 	TAILQ_ENTRY(sh_soft_intrhand) sih_q;
     97 	struct sh_soft_intr *sih_intrhead;
     98 	void	(*sih_fn)(void *);
     99 	void	*sih_arg;
    100 	int	sih_pending;
    101 };
    102 
    103 struct sh_soft_intr {
    104 	TAILQ_HEAD(, sh_soft_intrhand) softintr_q;
    105 	struct evcnt softintr_evcnt;
    106 	struct simplelock softintr_slock;
    107 	unsigned long softintr_ipl;
    108 };
    109 
    110 #define	softintr_schedule(arg)						\
    111 do {									\
    112 	struct sh_soft_intrhand *__sih = (arg);				\
    113 	struct sh_soft_intr *__si = __sih->sih_intrhead;		\
    114 	int __s;							\
    115 									\
    116 	__s = _cpu_intr_suspend();					\
    117 	simple_lock(&__si->softintr_slock);				\
    118 	if (__sih->sih_pending == 0) {					\
    119 		TAILQ_INSERT_TAIL(&__si->softintr_q, __sih, sih_q);	\
    120 		__sih->sih_pending = 1;					\
    121 		setsoft(__si->softintr_ipl);				\
    122 	}								\
    123 	simple_unlock(&__si->softintr_slock);				\
    124 	_cpu_intr_resume(__s);						\
    125 } while (/*CONSTCOND*/0)
    126 
    127 void softintr_init(void);
    128 void *softintr_establish(int, void (*)(void *), void *);
    129 void softintr_disestablish(void *);
    130 void softintr_dispatch(int);
    131 void setsoft(int);
    132 
    133 /* XXX For legacy software interrupts. */
    134 extern struct sh_soft_intrhand *softnet_intrhand;
    135 
    136 #define	setsoftnet()	softintr_schedule(softnet_intrhand)
    137 
    138 #endif /* !_SH3_INTR_H_ */
    139