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intr.h revision 1.35 
      1 /*	$NetBSD: intr.h,v 1.35 2023/07/11 10:42:26 riastradh Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1996, 1997, 1999 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Jason R. Thorpe.
      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 _HP300_INTR_H_
     33 #define	_HP300_INTR_H_
     34 
     35 #include <sys/types.h>
     36 
     37 #include <sys/evcnt.h>
     38 #include <sys/queue.h>
     39 #include <sys/stdbool.h>
     40 
     41 #include <machine/psl.h>
     42 
     43 /*
     44  * Interrupt "levels".  These are a more abstract representation
     45  * of interrupt levels, and do not have the same meaning as m68k
     46  * CPU interrupt levels.  They serve the following purposes:
     47  *
     48  *	- properly order ISRs in the list for that CPU ipl
     49  *	- compute CPU PSL values for the spl*() calls.
     50  *	- used to create cookie for the splraiseipl().
     51  */
     52 #define	IPL_NONE	0
     53 #define	IPL_SOFTCLOCK	1
     54 #define	IPL_SOFTBIO	2
     55 #define	IPL_SOFTNET	3
     56 #define	IPL_SOFTSERIAL	4
     57 #define	IPL_VM		5
     58 #define	IPL_SCHED	6
     59 #define	IPL_HIGH	7
     60 #define	NIPL		8
     61 
     62 /*
     63  * Convert PSL values to m68k CPU IPLs and vice-versa.
     64  * Note: CPU IPL values are different from IPL_* used by splraiseipl().
     65  */
     66 #define	PSLTOIPL(x)	(((x) >> 8) & 0xf)
     67 #define	IPLTOPSL(x)	((((x) & 0xf) << 8) | PSL_S)
     68 
     69 extern int idepth;
     70 
     71 static inline bool
     72 cpu_intr_p(void)
     73 {
     74 
     75 	return idepth != 0;
     76 }
     77 
     78 extern const uint16_t ipl2psl_table[NIPL];
     79 
     80 typedef int ipl_t;
     81 typedef struct {
     82 	uint16_t _psl;
     83 } ipl_cookie_t;
     84 
     85 static inline ipl_cookie_t
     86 makeiplcookie(ipl_t ipl)
     87 {
     88 
     89 	return (ipl_cookie_t){._psl = ipl2psl_table[ipl]};
     90 }
     91 
     92 static inline int
     93 splraiseipl(ipl_cookie_t icookie)
     94 {
     95 
     96 	return _splraise(icookie._psl);
     97 }
     98 
     99 static inline void
    100 splx(int sr)
    101 {
    102 
    103 	__asm volatile("movew %0,%%sr" : : "di" (sr));
    104 }
    105 
    106 /* These spl calls are _not_ to be used by machine-independent code. */
    107 #define	splhil()	splraise1()
    108 #define	splkbd()	splhil()
    109 
    110 /* These spl calls are used by machine-independent code. */
    111 #define	spl0()		_spl0()
    112 
    113 #define	splsoftbio()	splraise1()
    114 #define	splsoftclock()	splraise1()
    115 #define	splsoftnet()	splraise1()
    116 #define	splsoftserial()	splraise1()
    117 #define	splvm()		splraise5()
    118 #define	splsched()	spl6()
    119 #define	splhigh()	spl7()
    120 
    121 struct hp300_intrhand {
    122 	LIST_ENTRY(hp300_intrhand) ih_q;
    123 	int (*ih_fn)(void *);
    124 	void *ih_arg;
    125 	int ih_ipl;
    126 	int ih_priority;
    127 };
    128 
    129 struct hp300_intr {
    130 	LIST_HEAD(, hp300_intrhand) hi_q;
    131 	struct evcnt hi_evcnt;
    132 };
    133 
    134 /* intr.c */
    135 void	intr_init(void);
    136 void	*intr_establish(int (*)(void *), void *, int, int);
    137 void	intr_disestablish(void *);
    138 void	intr_dispatch(int);
    139 
    140 #endif /* _HP300_INTR_H_ */
    141