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intr.h revision 1.16 
      1 /*	$NetBSD: intr.h,v 1.16 2020/04/16 21:56:42 rin Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 2007 Michael Lorenz
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     17  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     18  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     19  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     20  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     21  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     22  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     23  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     24  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     25  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     26  * POSSIBILITY OF SUCH DAMAGE.
     27  */
     28 
     29 #ifndef _POWERPC_INTR_MACHDEP_H_
     30 #define _POWERPC_INTR_MACHDEP_H_
     31 
     32 #define	__HAVE_FAST_SOFTINTS	1
     33 
     34 
     35 /* Interrupt priority `levels'. */
     36 #define	IPL_NONE		0	/* nothing */
     37 #define	IPL_SOFTCLOCK		1	/* timeouts */
     38 #define	IPL_SOFTBIO		2	/* block I/O */
     39 #define	IPL_SOFTNET		3	/* protocol stacks */
     40 #define	IPL_SOFTSERIAL		4	/* serial */
     41 #define	IPL_VM			5	/* memory allocation */
     42 #define	IPL_SCHED		6
     43 #define	IPL_HIGH		7	/* everything */
     44 #define	NIPL			8
     45 
     46 /* Interrupt sharing types. */
     47 #define	IST_NONE		0	/* none */
     48 #define	IST_PULSE		1	/* pulsed */
     49 #define	IST_EDGE		2	/* falling edge triggered */
     50 #define	IST_LEVEL		3	/* low level triggered */
     51 
     52 #define IST_EDGE_FALLING	IST_EDGE
     53 #define IST_EDGE_RISING		4	/* rising edge triggered */
     54 #define IST_LEVEL_LOW		IST_LEVEL
     55 #define IST_LEVEL_HIGH		5	/* high level triggered */
     56 
     57 #if !defined(_LOCORE)
     58 void *	intr_establish(int, int, int, int (*)(void *), void *);
     59 void *	intr_establish_xname(int, int, int, int (*)(void *), void *,
     60 	    const char *);
     61 void	intr_disestablish(void *);
     62 const char *
     63 	intr_typename(int);
     64 
     65 int	splraise(int);
     66 int	spllower(int);
     67 void	splx(int);
     68 
     69 #if !defined(_MODULE)
     70 
     71 #include <powerpc/softint.h>
     72 
     73 void	genppc_cpu_configure(void);
     74 
     75 /*
     76  * Interrupt handler chains.  intr_establish() inserts a handler into
     77  * the list.  The handler is called with its (single) argument.
     78  */
     79 struct intrhand {
     80 	int	(*ih_fun)(void *);
     81 	void	*ih_arg;
     82 	struct	intrhand *ih_next;
     83 	int	ih_ipl;
     84 	int	ih_virq;
     85 	char	ih_xname[INTRDEVNAMEBUF];
     86 };
     87 
     88 void softint_fast_dispatch(struct lwp *, int);
     89 
     90 #ifdef __HAVE_FAST_SOFTINTS
     91 #define softint_init_md		powerpc_softint_init_md
     92 #define softint_trigger		powerpc_softint_trigger
     93 #endif
     94 
     95 #ifdef __IMASK_T
     96 typedef __IMASK_T imask_t;
     97 #else
     98 typedef uint32_t imask_t;
     99 #endif
    100 
    101 extern imask_t imask[];
    102 
    103 #define NVIRQ		(sizeof(imask_t)*8)	/* 32 virtual IRQs */
    104 #ifndef NIRQ
    105 #define NIRQ		256	/* up to 256 HW IRQs */
    106 #endif
    107 
    108 #define HWIRQ_MAX       (NVIRQ - 1)
    109 #define HWIRQ_MASK     	(~(imask_t)0 >> 1)
    110 
    111 #define	PIC_VIRQ_TO_MASK(v)	__BIT(HWIRQ_MAX - (v))
    112 #define PIC_VIRQ_MS_PENDING(p)	__builtin_clz(p)
    113 
    114 #endif /* !_MODULE */
    115 
    116 #define spl0()		spllower(0)
    117 
    118 typedef int ipl_t;
    119 typedef struct {
    120 	ipl_t _ipl;
    121 } ipl_cookie_t;
    122 
    123 static __inline ipl_cookie_t
    124 makeiplcookie(ipl_t ipl)
    125 {
    126 
    127 	return (ipl_cookie_t){._ipl = ipl};
    128 }
    129 
    130 static __inline int
    131 splraiseipl(ipl_cookie_t icookie)
    132 {
    133 
    134 	return splraise(icookie._ipl);
    135 }
    136 
    137 #include <sys/spl.h>
    138 
    139 #endif /* _LOCORE */
    140 
    141 #endif /* _POWERPC_INTR_MACHDEP_H_ */
    142