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intr.h revision 1.9 
      1 /*	$NetBSD: intr.h,v 1.9 2006/10/05 14:24:10 tsutsui Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 2001 Matt Fredette.
      5  * Copyright (c) 1998 Matt Thomas.
      6  * All rights reserved.
      7  *
      8  * Redistribution and use in source and binary forms, with or without
      9  * modification, are permitted provided that the following conditions
     10  * are met:
     11  * 1. Redistributions of source code must retain the above copyright
     12  *    notice, this list of conditions and the following disclaimer.
     13  * 2. Redistributions in binary form must reproduce the above copyright
     14  *    notice, this list of conditions and the following disclaimer in the
     15  *    documentation and/or other materials provided with the distribution.
     16  * 3. The name of the company nor the names of the authors may be used to
     17  *    endorse or promote products derived from this software without specific
     18  *    prior written permission.
     19  *
     20  * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR IMPLIED
     21  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
     22  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     23  * IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
     24  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
     25  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
     26  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     30  * SUCH DAMAGE.
     31  */
     32 
     33 #ifndef _SUN68K_INTR_H_
     34 #define _SUN68K_INTR_H_
     35 
     36 #include <sys/queue.h>
     37 #include <m68k/psl.h>
     38 
     39 /*
     40  * Interrupt levels.  Right now these correspond to real
     41  * hardware levels, but I don't think anything counts on
     42  * that (yet?).
     43  */
     44 #define _IPL_SOFT_LEVEL1	1
     45 #define _IPL_SOFT_LEVEL2	2
     46 #define _IPL_SOFT_LEVEL3	3
     47 #define _IPL_SOFT_LEVEL_MIN	1
     48 #define _IPL_SOFT_LEVEL_MAX	3
     49 
     50 #define	IPL_NONE	0
     51 #define	IPL_SOFT_LEVEL1	(PSL_S|PSL_IPL1)
     52 #define	IPL_SOFT_LEVEL2	(PSL_S|PSL_IPL2)
     53 #define	IPL_SOFT_LEVEL3	(PSL_S|PSL_IPL3)
     54 #define	IPL_SOFTCLOCK	IPL_SOFT_LEVEL1
     55 #define	IPL_SOFTNET	IPL_SOFT_LEVEL1
     56 #define	IPL_BIO		(PSL_S|PSL_IPL2)
     57 #define	IPL_NET		(PSL_S|PSL_IPL3)
     58 #define	IPL_SOFTSERIAL	IPL_SOFT_LEVEL3
     59 #define	IPL_TTY		(PSL_S|PSL_IPL4)
     60 #define	IPL_VM		(PSL_S|PSL_IPL4)
     61 /* Intersil or Am9513 clock hardware interrupts (hard-wired at 5) */
     62 #define	IPL_CLOCK	(PSL_S|PSL_IPL5)
     63 #define	IPL_STATCLOCK	IPL_CLOCK
     64 #define	IPL_SCHED	(PSL_S|PSL_IPL7)
     65 #define	IPL_HIGH	(PSL_S|PSL_IPL7)
     66 #define	IPL_LOCK	(PSL_S|PSL_IPL7)
     67 #define	IPL_SERIAL	(PSL_S|PSL_IPL6)
     68 
     69 #ifdef _KERNEL
     70 LIST_HEAD(sh_head, softintr_handler);
     71 
     72 struct softintr_head {
     73 	int shd_ipl;
     74 	struct sh_head shd_intrs;
     75 };
     76 
     77 struct softintr_handler {
     78 	struct softintr_head *sh_head;
     79 	LIST_ENTRY(softintr_handler) sh_link;
     80 	void (*sh_func)(void *);
     81 	void *sh_arg;
     82 	int sh_pending;
     83 };
     84 
     85 void softintr_init(void);
     86 void *softintr_establish(int, void (*)(void *), void *);
     87 void softintr_disestablish(void *);
     88 
     89 /* These control the software interrupt register. */
     90 void isr_soft_request(int);
     91 void isr_soft_clear(int);
     92 
     93 static __inline void
     94 softintr_schedule(void *arg)
     95 {
     96 	struct softintr_handler * const sh = arg;
     97 	if (sh->sh_pending == 0) {
     98 		sh->sh_pending = 1;
     99 		isr_soft_request(sh->sh_head->shd_ipl);
    100 	}
    101 }
    102 
    103 extern void *softnet_cookie;
    104 #define setsoftnet()	softintr_schedule(softnet_cookie)
    105 
    106 /* These connect interrupt handlers. */
    107 typedef int (*isr_func_t)(void *);
    108 void isr_add_autovect(isr_func_t, void *, int);
    109 void isr_add_vectored(isr_func_t, void *, int, int);
    110 void isr_add_custom(int, void *);
    111 
    112 /*
    113  * Define inline functions for PSL manipulation.
    114  * These are as close to macros as one can get.
    115  * When not optimizing gcc will call the locore.s
    116  * functions by the same names, so breakpoints on
    117  * these functions will work normally, etc.
    118  * (See the GCC extensions info document.)
    119  */
    120 
    121 static __inline int _getsr(void);
    122 
    123 /* Get current sr value. */
    124 static __inline int
    125 _getsr(void)
    126 {
    127 	int rv;
    128 
    129 	__asm volatile ("clrl %0; movew %%sr,%0" : "=&d" (rv));
    130 	return (rv);
    131 }
    132 
    133 /*
    134  * The rest of this is sun68k specific, because other ports may
    135  * need to do special things in spl0() (i.e. simulate SIR).
    136  * Suns have a REAL interrupt register, so spl0() and splx(s)
    137  * have no need to check for any simulated interrupts, etc.
    138  */
    139 
    140 #define spl0()  _spl0()		/* we have real software interrupts */
    141 #define splx(x)	_spl(x)
    142 
    143 /* IPL used by soft interrupts: netintr(), softclock() */
    144 #define	spllowersoftclock() spl1()
    145 
    146 /* Zilog Serial hardware interrupts (hard-wired at 6) */
    147 #define splzs()		spl6()
    148 
    149 /* This returns true iff the spl given is spl0. */
    150 #define	is_spl0(s)	(((s) & PSL_IPL7) == 0)
    151 
    152 #define	splraiseipl(x)	_splraise(x)
    153 
    154 #include <sys/spl.h>
    155 
    156 #endif	/* _KERNEL */
    157 
    158 #endif	/* _SUN68K_INTR_H */
    159