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intr.h revision 1.3 
      1 /*	$NetBSD: intr.h,v 1.3 1996/11/17 02:03:10 cgd Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1996 Carnegie-Mellon University.
      5  * All rights reserved.
      6  *
      7  * Author: Chris G. Demetriou
      8  *
      9  * Permission to use, copy, modify and distribute this software and
     10  * its documentation is hereby granted, provided that both the copyright
     11  * notice and this permission notice appear in all copies of the
     12  * software, derivative works or modified versions, and any portions
     13  * thereof, and that both notices appear in supporting documentation.
     14  *
     15  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
     16  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
     17  * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
     18  *
     19  * Carnegie Mellon requests users of this software to return to
     20  *
     21  *  Software Distribution Coordinator  or  Software.Distribution (at) CS.CMU.EDU
     22  *  School of Computer Science
     23  *  Carnegie Mellon University
     24  *  Pittsburgh PA 15213-3890
     25  *
     26  * any improvements or extensions that they make and grant Carnegie the
     27  * rights to redistribute these changes.
     28  */
     29 
     30 #ifndef _ALPHA_INTR_H_
     31 #define _ALPHA_INTR_H_
     32 
     33 #include <sys/queue.h>
     34 
     35 #define	IPL_NONE	0	/* disable only this interrupt */
     36 #define	IPL_BIO		1	/* disable block I/O interrupts */
     37 #define	IPL_NET		2	/* disable network interrupts */
     38 #define	IPL_TTY		3	/* disable terminal interrupts */
     39 #define	IPL_CLOCK	4	/* disable clock interrupts */
     40 #define	IPL_HIGH	5	/* disable all interrupts */
     41 
     42 #define	IST_UNUSABLE	-1	/* interrupt cannot be used */
     43 #define	IST_NONE	0	/* none (dummy) */
     44 #define	IST_PULSE	1	/* pulsed */
     45 #define	IST_EDGE	2	/* edge-triggered */
     46 #define	IST_LEVEL	3	/* level-triggered */
     47 
     48 #define splx(s)								\
     49 	    (s == ALPHA_PSL_IPL_0 ? spl0() : alpha_pal_swpipl(s))
     50 #define splsoft()               alpha_pal_swpipl(ALPHA_PSL_IPL_SOFT)
     51 #define splsoftclock()          splsoft()
     52 #define splsoftnet()            splsoft()
     53 #define splnet()                alpha_pal_swpipl(ALPHA_PSL_IPL_IO)
     54 #define splbio()                alpha_pal_swpipl(ALPHA_PSL_IPL_IO)
     55 #define splimp()                alpha_pal_swpipl(ALPHA_PSL_IPL_IO)
     56 #define spltty()                alpha_pal_swpipl(ALPHA_PSL_IPL_IO)
     57 #define splclock()              alpha_pal_swpipl(ALPHA_PSL_IPL_CLOCK)
     58 #define splstatclock()          alpha_pal_swpipl(ALPHA_PSL_IPL_CLOCK)
     59 #define splhigh()               alpha_pal_swpipl(ALPHA_PSL_IPL_HIGH)
     60 
     61 /*
     62  * simulated software interrupt register
     63  */
     64 extern u_int64_t ssir;
     65 
     66 #define	SIR_NET		0x1
     67 #define	SIR_CLOCK	0x2
     68 
     69 #define	siroff(x)	ssir &= ~(x)
     70 #define	setsoftnet()	ssir |= SIR_NET
     71 #define	setsoftclock()	ssir |= SIR_CLOCK
     72 
     73 /*
     74  * Alpha shared-interrupt-line common code.
     75  */
     76 
     77 struct alpha_shared_intrhand {
     78 	TAILQ_ENTRY(alpha_shared_intrhand)
     79 		ih_q;
     80 	int	(*ih_fn) __P((void *));
     81 	void	*ih_arg;
     82 	int	ih_level;
     83 };
     84 
     85 struct alpha_shared_intr {
     86 	TAILQ_HEAD(,alpha_shared_intrhand)
     87 		intr_q;
     88 	int	intr_sharetype;
     89 	int	intr_dfltsharetype;
     90 	int	intr_nstrays;
     91 	int	intr_maxstrays;
     92 };
     93 
     94 struct alpha_shared_intr *alpha_shared_intr_alloc __P((unsigned int));
     95 int	alpha_shared_intr_dispatch __P((struct alpha_shared_intr *,
     96 	    unsigned int));
     97 void	*alpha_shared_intr_establish __P((struct alpha_shared_intr *,
     98 	    unsigned int, int, int, int (*)(void *), void *, const char *));
     99 int	alpha_shared_intr_get_sharetype __P((struct alpha_shared_intr *,
    100 	    unsigned int));
    101 int	alpha_shared_intr_isactive __P((struct alpha_shared_intr *,
    102 	    unsigned int));
    103 void	alpha_shared_intr_set_dfltsharetype __P((struct alpha_shared_intr *,
    104 	    unsigned int, int));
    105 void	alpha_shared_intr_set_maxstrays __P((struct alpha_shared_intr *,
    106 	    unsigned int, int));
    107 void	alpha_shared_intr_stray __P((struct alpha_shared_intr *, unsigned int,
    108 	    const char *));
    109 
    110 #endif
    111