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intr.h revision 1.26 
      1 /*	$NetBSD: intr.h,v 1.26 2007/12/03 15:33:39 ad 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  * 3. All advertising materials mentioning features or use of this software
     19  *    must display the following acknowledgement:
     20  *        This product includes software developed by the NetBSD
     21  *        Foundation, Inc. and its contributors.
     22  * 4. Neither the name of The NetBSD Foundation nor the names of its
     23  *    contributors may be used to endorse or promote products derived
     24  *    from this software without specific prior written permission.
     25  *
     26  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     27  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     28  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     29  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     30  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     31  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     32  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     33  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     34  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     35  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     36  * POSSIBILITY OF SUCH DAMAGE.
     37  */
     38 
     39 #ifndef _HP300_INTR_H_
     40 #define	_HP300_INTR_H_
     41 
     42 #include <sys/device.h>
     43 #include <sys/queue.h>
     44 #include <machine/psl.h>
     45 
     46 /*
     47  * Interrupt "levels".  These are a more abstract representation
     48  * of interrupt levels, and do not have the same meaning as m68k
     49  * CPU interrupt levels.  They serve the following purposes:
     50  *
     51  *	- properly order ISRs in the list for that CPU ipl
     52  *	- compute CPU PSL values for the spl*() calls.
     53  *	- used to create cookie for the splraiseipl().
     54  */
     55 #define	IPL_NONE	0
     56 #define	IPL_SOFTCLOCK	1
     57 #define	IPL_SOFTBIO	2
     58 #define	IPL_SOFTNET	3
     59 #define	IPL_SOFTSERIAL	4
     60 #define	IPL_VM		5
     61 #define	IPL_SCHED	6
     62 #define	IPL_HIGH	7
     63 #define	NIPL		8
     64 
     65 /*
     66  * Convert PSL values to m68k CPU IPLs and vice-versa.
     67  * Note: CPU IPL values are different from IPL_* used by splraiseipl().
     68  */
     69 #define	PSLTOIPL(x)	(((x) >> 8) & 0xf)
     70 #define	IPLTOPSL(x)	((((x) & 0xf) << 8) | PSL_S)
     71 
     72 extern u_short hp300_ipl2psl[];
     73 
     74 typedef int ipl_t;
     75 typedef struct {
     76 	uint16_t _psl;
     77 } ipl_cookie_t;
     78 
     79 static inline ipl_cookie_t
     80 makeiplcookie(ipl_t ipl)
     81 {
     82 
     83 	return (ipl_cookie_t){._psl = hp300_ipl2psl[ipl]};
     84 }
     85 
     86 static inline int
     87 splraiseipl(ipl_cookie_t icookie)
     88 {
     89 
     90 	return _splraise(icookie._psl);
     91 }
     92 
     93 /* These spl calls are _not_ to be used by machine-independent code. */
     94 #define	splhil()	splraise1()
     95 #define	splkbd()	splhil()
     96 
     97 /* These spl calls are used by machine-independent code. */
     98 /* spl0 requires checking for software interrupts */
     99 #define	splsoftbio()	splraise1()
    100 #define	splsoftclock()	splraise1()
    101 #define	splsoftnet()	splraise1()
    102 #define	splsoftserial()	splraise1()
    103 #define	splvm()		_splraise(hp300_ipl2psl[IPL_VM])
    104 #define	splsched()	spl6()
    105 #define	splhigh()	spl7()
    106 
    107 /* watch out for side effects */
    108 #define	splx(s)		((s) & PSL_IPL ? _spl((s)) : spl0())
    109 
    110 struct hp300_intrhand {
    111 	LIST_ENTRY(hp300_intrhand) ih_q;
    112 	int (*ih_fn)(void *);
    113 	void *ih_arg;
    114 	int ih_ipl;
    115 	int ih_priority;
    116 };
    117 
    118 struct hp300_intr {
    119 	LIST_HEAD(, hp300_intrhand) hi_q;
    120 	struct evcnt hi_evcnt;
    121 };
    122 
    123 /* locore.s */
    124 int	spl0(void);
    125 
    126 /* intr.c */
    127 void	intr_init(void);
    128 void	*intr_establish(int (*)(void *), void *, int, int);
    129 void	intr_disestablish(void *);
    130 void	intr_dispatch(int);
    131 void	intr_printlevels(void);
    132 
    133 #endif /* _HP300_INTR_H_ */
    134