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intr.h revision 1.8 
      1 /* $NetBSD: intr.h,v 1.8 1997/06/05 17:31:16 cgd Exp $ */
      2 
      3 /*
      4  * Copyright (c) 1997 Christopher G. Demetriou.  All rights reserved.
      5  * Copyright (c) 1996 Carnegie-Mellon University.
      6  * All rights reserved.
      7  *
      8  * Author: Chris G. Demetriou
      9  *
     10  * Permission to use, copy, modify and distribute this software and
     11  * its documentation is hereby granted, provided that both the copyright
     12  * notice and this permission notice appear in all copies of the
     13  * software, derivative works or modified versions, and any portions
     14  * thereof, and that both notices appear in supporting documentation.
     15  *
     16  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
     17  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
     18  * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
     19  *
     20  * Carnegie Mellon requests users of this software to return to
     21  *
     22  *  Software Distribution Coordinator  or  Software.Distribution (at) CS.CMU.EDU
     23  *  School of Computer Science
     24  *  Carnegie Mellon University
     25  *  Pittsburgh PA 15213-3890
     26  *
     27  * any improvements or extensions that they make and grant Carnegie the
     28  * rights to redistribute these changes.
     29  */
     30 
     31 #ifndef _ALPHA_INTR_H_
     32 #define _ALPHA_INTR_H_
     33 
     34 #include <sys/queue.h>
     35 
     36 #define	IPL_NONE	0	/* disable only this interrupt */
     37 #define	IPL_BIO		1	/* disable block I/O interrupts */
     38 #define	IPL_NET		2	/* disable network interrupts */
     39 #define	IPL_TTY		3	/* disable terminal interrupts */
     40 #define	IPL_CLOCK	4	/* disable clock interrupts */
     41 #define	IPL_HIGH	5	/* disable all interrupts */
     42 
     43 #define	IST_UNUSABLE	-1	/* interrupt cannot be used */
     44 #define	IST_NONE	0	/* none (dummy) */
     45 #define	IST_PULSE	1	/* pulsed */
     46 #define	IST_EDGE	2	/* edge-triggered */
     47 #define	IST_LEVEL	3	/* level-triggered */
     48 
     49 /* IPL-lowering/restoring macros */
     50 #define splx(s)								\
     51     ((s) == ALPHA_PSL_IPL_0 ? spl0() : alpha_pal_swpipl(s))
     52 #define splsoft()               alpha_pal_swpipl(ALPHA_PSL_IPL_SOFT)
     53 #define splsoftclock()          splsoft()
     54 #define splsoftnet()            splsoft()
     55 
     56 /* IPL-raising functions/macros */
     57 static __inline int
     58 _splraise(s)
     59 	int s;
     60 {
     61 	int cur = alpha_pal_rdps() & ALPHA_PSL_IPL_MASK;
     62 	return (a > cur ? alpha_pal_swpipl(a) : cur);
     63 }
     64 #define splnet()                _splraise(ALPHA_PSL_IPL_IO)
     65 #define splbio()                _splraise(ALPHA_PSL_IPL_IO)
     66 #define splimp()                _splraise(ALPHA_PSL_IPL_IO)
     67 #define spltty()                _splraise(ALPHA_PSL_IPL_IO)
     68 #define splclock()              _splraise(ALPHA_PSL_IPL_CLOCK)
     69 #define splstatclock()          _splraise(ALPHA_PSL_IPL_CLOCK)
     70 #define splhigh()               _splraise(ALPHA_PSL_IPL_HIGH)
     71 
     72 /*
     73  * simulated software interrupt register
     74  */
     75 extern u_int64_t ssir;
     76 
     77 #define	SIR_NET		0x1
     78 #define	SIR_CLOCK	0x2
     79 
     80 #define	setsoftnet()	ssir |= SIR_NET
     81 #define	setsoftclock()	ssir |= SIR_CLOCK
     82 
     83 /*
     84  * Alpha shared-interrupt-line common code.
     85  */
     86 
     87 struct alpha_shared_intrhand {
     88 	TAILQ_ENTRY(alpha_shared_intrhand)
     89 		ih_q;
     90 	int	(*ih_fn) __P((void *));
     91 	void	*ih_arg;
     92 	int	ih_level;
     93 };
     94 
     95 struct alpha_shared_intr {
     96 	TAILQ_HEAD(,alpha_shared_intrhand)
     97 		intr_q;
     98 	int	intr_sharetype;
     99 	int	intr_dfltsharetype;
    100 	int	intr_nstrays;
    101 	int	intr_maxstrays;
    102 };
    103 
    104 struct alpha_shared_intr *alpha_shared_intr_alloc __P((unsigned int));
    105 int	alpha_shared_intr_dispatch __P((struct alpha_shared_intr *,
    106 	    unsigned int));
    107 void	*alpha_shared_intr_establish __P((struct alpha_shared_intr *,
    108 	    unsigned int, int, int, int (*)(void *), void *, const char *));
    109 int	alpha_shared_intr_get_sharetype __P((struct alpha_shared_intr *,
    110 	    unsigned int));
    111 int	alpha_shared_intr_isactive __P((struct alpha_shared_intr *,
    112 	    unsigned int));
    113 void	alpha_shared_intr_set_dfltsharetype __P((struct alpha_shared_intr *,
    114 	    unsigned int, int));
    115 void	alpha_shared_intr_set_maxstrays __P((struct alpha_shared_intr *,
    116 	    unsigned int, int));
    117 void	alpha_shared_intr_stray __P((struct alpha_shared_intr *, unsigned int,
    118 	    const char *));
    119 
    120 #endif
    121