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      1 /*	$NetBSD: intr.h,v 1.25 2024/01/19 20:55:42 thorpej Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1996, 1997, 2007 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Leo Weppelman.
      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  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #ifndef _ATARI_INTR_H_
     33 #define _ATARI_INTR_H_
     34 
     35 #define	IPL_NONE	0		    /* disable no interrupts	    */
     36 #define	IPL_SOFTCLOCK	1
     37 #define	IPL_SOFTBIO	2
     38 #define	IPL_SOFTNET	3
     39 #define	IPL_SOFTSERIAL	4
     40 #define	IPL_VM		5
     41 #define	IPL_SCHED	6
     42 #define	IPL_HIGH	7
     43 #define	NIPL		8
     44 
     45 #define	IST_UNUSABLE	-1	/* interrupt cannot be used	*/
     46 #define	IST_NONE	0	/* none (dummy)			*/
     47 #define	IST_PULSE	1	/* pulsed			*/
     48 #define	IST_EDGE	2	/* edge-triggered		*/
     49 #define	IST_LEVEL	3	/* level-triggered		*/
     50 
     51 #if defined(_KERNEL) || defined(_KMEMUSER)
     52 typedef struct {
     53 	uint16_t _psl;
     54 } ipl_cookie_t;
     55 #endif
     56 
     57 /*
     58  * spl functions; all but spl0 are done in-line
     59  */
     60 #include <machine/psl.h>
     61 
     62 /* spl0 requires checking for software interrupts */
     63 
     64 #define splsoftclock()		splraise1()
     65 #define splsoftbio()		splraise1()
     66 #define splsoftnet()		splraise1()
     67 #define splsoftserial()		splraise1()
     68 #define splvm()			splraise4()
     69 #define splsched()		splraise6()
     70 #define splhigh()		spl7()
     71 #define splx(s)			((s) & PSL_IPL ? _spl(s) : spl0())
     72 
     73 #ifdef _KERNEL
     74 int spl0(void);
     75 
     76 extern const uint16_t ipl2psl_table[NIPL];
     77 extern volatile unsigned int intr_depth;
     78 
     79 typedef int ipl_t;
     80 
     81 static inline ipl_cookie_t
     82 makeiplcookie(ipl_t ipl)
     83 {
     84 
     85 	return (ipl_cookie_t){._psl = ipl2psl_table[ipl]};
     86 }
     87 
     88 static inline int
     89 splraiseipl(ipl_cookie_t icookie)
     90 {
     91 
     92 	return _splraise(icookie._psl);
     93 }
     94 
     95 #include <sys/queue.h>
     96 #include <machine/cpu.h>	/* XXX: for clockframe */
     97 
     98 struct clockframe;
     99 
    100 #define	AUTO_VEC	0x0001	/* We're dealing with an auto-vector	*/
    101 #define	USER_VEC	0x0002	/* We're dealing with an user-vector	*/
    102 
    103 #define	FAST_VEC	0x0010	/* Fast, stash right into vector-table	*/
    104 #define	ARG_CLOCKFRAME	0x0020	/* Supply clockframe as an argument	*/
    105 
    106 /*
    107  * Interrupt handler chains.  intr_establish() inserts a handler into
    108  * the list.  The handler is called with its (single) argument or with a
    109  * 'standard' clockframe. This depends on 'ih_type'.
    110  */
    111 typedef int	(*hw_ifun_t)(void *, int);
    112 
    113 struct intrhand {
    114 	LIST_ENTRY(intrhand)	ih_link;
    115 	hw_ifun_t		ih_fun;
    116 	void			*ih_arg;
    117 	int			ih_type;
    118 	int			ih_pri;
    119 	int			ih_vector;
    120 	u_int			*ih_intrcnt;
    121 };
    122 
    123 void		intr_init(void);
    124 struct intrhand *intr_establish(int, int, int, hw_ifun_t, void *);
    125 int		intr_disestablish(struct intrhand *);
    126 void		intr_dispatch(struct clockframe);
    127 void		intr_glue(void);
    128 
    129 /*
    130  * Exported by intrcnt.h
    131  */
    132 extern u_long	autovects[];
    133 extern u_int	intrcnt_auto[];
    134 extern u_long	uservects[];
    135 extern u_int	intrcnt_user[];
    136 
    137 #endif /* _KERNEL */
    138 
    139 #endif /* _ATARI_INTR_H_ */
    140