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intr.h revision 1.31 
      1 /*	$NetBSD: intr.h,v 1.31 2008/06/22 17:35:14 tsutsui 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/device.h>
     36 #include <sys/queue.h>
     37 #include <machine/psl.h>
     38 
     39 /*
     40  * Interrupt "levels".  These are a more abstract representation
     41  * of interrupt levels, and do not have the same meaning as m68k
     42  * CPU interrupt levels.  They serve the following purposes:
     43  *
     44  *	- properly order ISRs in the list for that CPU ipl
     45  *	- compute CPU PSL values for the spl*() calls.
     46  *	- used to create cookie for the splraiseipl().
     47  */
     48 #define	IPL_NONE	0
     49 #define	IPL_SOFTCLOCK	1
     50 #define	IPL_SOFTBIO	2
     51 #define	IPL_SOFTNET	3
     52 #define	IPL_SOFTSERIAL	4
     53 #define	IPL_VM		5
     54 #define	IPL_SCHED	6
     55 #define	IPL_HIGH	7
     56 #define	NIPL		8
     57 
     58 /*
     59  * Convert PSL values to m68k CPU IPLs and vice-versa.
     60  * Note: CPU IPL values are different from IPL_* used by splraiseipl().
     61  */
     62 #define	PSLTOIPL(x)	(((x) >> 8) & 0xf)
     63 #define	IPLTOPSL(x)	((((x) & 0xf) << 8) | PSL_S)
     64 
     65 extern int idepth;
     66 
     67 static inline bool
     68 cpu_intr_p(void)
     69 {
     70 
     71 	return idepth != 0;
     72 }
     73 
     74 extern const uint16_t ipl2psl_table[NIPL];
     75 
     76 typedef int ipl_t;
     77 typedef struct {
     78 	uint16_t _psl;
     79 } ipl_cookie_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 /* These spl calls are _not_ to be used by machine-independent code. */
     96 #define	splhil()	splraise1()
     97 #define	splkbd()	splhil()
     98 
     99 /* These spl calls are used by machine-independent code. */
    100 /* spl0 requires checking for software interrupts */
    101 #define	splsoftbio()	splraise1()
    102 #define	splsoftclock()	splraise1()
    103 #define	splsoftnet()	splraise1()
    104 #define	splsoftserial()	splraise1()
    105 #define	splvm()		splraise5()
    106 #define	splsched()	spl6()
    107 #define	splhigh()	spl7()
    108 
    109 /* watch out for side effects */
    110 #define	splx(s)		((s) & PSL_IPL ? _spl((s)) : spl0())
    111 
    112 struct hp300_intrhand {
    113 	LIST_ENTRY(hp300_intrhand) ih_q;
    114 	int (*ih_fn)(void *);
    115 	void *ih_arg;
    116 	int ih_ipl;
    117 	int ih_priority;
    118 };
    119 
    120 struct hp300_intr {
    121 	LIST_HEAD(, hp300_intrhand) hi_q;
    122 	struct evcnt hi_evcnt;
    123 };
    124 
    125 /* locore.s */
    126 int	spl0(void);
    127 
    128 /* intr.c */
    129 void	intr_init(void);
    130 void	*intr_establish(int (*)(void *), void *, int, int);
    131 void	intr_disestablish(void *);
    132 void	intr_dispatch(int);
    133 
    134 #endif /* _HP300_INTR_H_ */
    135