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intr.h revision 1.13 
      1 /* $NetBSD: intr.h,v 1.13 1998/07/07 22:24:40 thorpej 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 #ifdef	_KERNEL
     49 
     50 /* IPL-lowering/restoring macros */
     51 #define splx(s)								\
     52     ((s) == ALPHA_PSL_IPL_0 ? spl0() : alpha_pal_swpipl(s))
     53 #define splsoft()               alpha_pal_swpipl(ALPHA_PSL_IPL_SOFT)
     54 #define splsoftclock()          splsoft()
     55 #define splsoftnet()            splsoft()
     56 
     57 /* IPL-raising functions/macros */
     58 static __inline int _splraise __P((int)) __attribute__ ((unused));
     59 static __inline int
     60 _splraise(s)
     61 	int s;
     62 {
     63 	int cur = alpha_pal_rdps() & ALPHA_PSL_IPL_MASK;
     64 	return (s > cur ? alpha_pal_swpipl(s) : cur);
     65 }
     66 #define splnet()                _splraise(ALPHA_PSL_IPL_IO)
     67 #define splbio()                _splraise(ALPHA_PSL_IPL_IO)
     68 #define splimp()                _splraise(ALPHA_PSL_IPL_IO)
     69 #define spltty()                _splraise(ALPHA_PSL_IPL_IO)
     70 #define splclock()              _splraise(ALPHA_PSL_IPL_CLOCK)
     71 #define splstatclock()          _splraise(ALPHA_PSL_IPL_CLOCK)
     72 #define splhigh()               _splraise(ALPHA_PSL_IPL_HIGH)
     73 
     74 /*
     75  * simulated software interrupt register
     76  */
     77 extern u_int64_t ssir;
     78 
     79 #define	SIR_NET		0x1
     80 #define	SIR_CLOCK	0x2
     81 
     82 #define	setsoftnet()	ssir |= SIR_NET
     83 #define	setsoftclock()	ssir |= SIR_CLOCK
     84 
     85 /*
     86  * Alpha shared-interrupt-line common code.
     87  */
     88 
     89 struct alpha_shared_intrhand {
     90 	TAILQ_ENTRY(alpha_shared_intrhand)
     91 		ih_q;
     92 	int	(*ih_fn) __P((void *));
     93 	void	*ih_arg;
     94 	int	ih_level;
     95 };
     96 
     97 struct alpha_shared_intr {
     98 	TAILQ_HEAD(,alpha_shared_intrhand)
     99 		intr_q;
    100 	int	intr_sharetype;
    101 	int	intr_dfltsharetype;
    102 	int	intr_nstrays;
    103 	int	intr_maxstrays;
    104 };
    105 
    106 #define	ALPHA_SHARED_INTR_DISABLE(asi, num)				\
    107 	((asi)[num].intr_maxstrays != 0 &&				\
    108 	 (asi)[num].intr_nstrays == (asi)[num].intr_maxstrays)
    109 
    110 struct alpha_shared_intr *alpha_shared_intr_alloc __P((unsigned int));
    111 int	alpha_shared_intr_dispatch __P((struct alpha_shared_intr *,
    112 	    unsigned int));
    113 void	*alpha_shared_intr_establish __P((struct alpha_shared_intr *,
    114 	    unsigned int, int, int, int (*)(void *), void *, const char *));
    115 int	alpha_shared_intr_get_sharetype __P((struct alpha_shared_intr *,
    116 	    unsigned int));
    117 int	alpha_shared_intr_isactive __P((struct alpha_shared_intr *,
    118 	    unsigned int));
    119 void	alpha_shared_intr_set_dfltsharetype __P((struct alpha_shared_intr *,
    120 	    unsigned int, int));
    121 void	alpha_shared_intr_set_maxstrays __P((struct alpha_shared_intr *,
    122 	    unsigned int, int));
    123 void	alpha_shared_intr_stray __P((struct alpha_shared_intr *, unsigned int,
    124 	    const char *));
    125 
    126 #endif
    127 #endif
    128