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intr.h revision 1.10 
      1 /*	$NetBSD: intr.h,v 1.10 2012/01/14 19:35:58 phx 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 _LOCORE
     30 #include <sys/cdefs.h>
     31 __KERNEL_RCSID(0, "$NetBSD: intr.h,v 1.10 2012/01/14 19:35:58 phx Exp $");
     32 #endif
     33 
     34 #ifndef POWERPC_INTR_MACHDEP_H
     35 #define POWERPC_INTR_MACHDEP_H
     36 
     37 #define	__HAVE_FAST_SOFTINTS	1
     38 
     39 
     40 /* Interrupt priority `levels'. */
     41 #define	IPL_NONE		0	/* nothing */
     42 #define	IPL_SOFTCLOCK		1	/* timeouts */
     43 #define	IPL_SOFTBIO		2	/* block I/O */
     44 #define	IPL_SOFTNET		3	/* protocol stacks */
     45 #define	IPL_SOFTSERIAL		4	/* serial */
     46 #define	IPL_VM			5	/* memory allocation */
     47 #define	IPL_SCHED		6
     48 #define	IPL_HIGH		7	/* everything */
     49 #define	NIPL			8
     50 
     51 /* Interrupt sharing types. */
     52 #define	IST_NONE		0	/* none */
     53 #define	IST_PULSE		1	/* pulsed */
     54 #define	IST_EDGE		2	/* falling edge triggered */
     55 #define	IST_LEVEL		3	/* low level triggered */
     56 
     57 #define IST_EDGE_FALLING	IST_EDGE
     58 #define IST_EDGE_RISING		4	/* rising edge triggered */
     59 #define IST_LEVEL_LOW		IST_LEVEL
     60 #define IST_LEVEL_HIGH		5	/* high level triggered */
     61 
     62 #if !defined(_LOCORE)
     63 void *	intr_establish(int, int, int, int (*)(void *), void *);
     64 void	intr_disestablish(void *);
     65 const char *
     66 	intr_typename(int);
     67 
     68 int	splraise(int);
     69 int	spllower(int);
     70 void	splx(int);
     71 
     72 #if !defined(_MODULE)
     73 
     74 void	genppc_cpu_configure(void);
     75 
     76 /*
     77  * Interrupt handler chains.  intr_establish() inserts a handler into
     78  * the list.  The handler is called with its (single) argument.
     79  */
     80 struct intrhand {
     81 	int	(*ih_fun)(void *);
     82 	void	*ih_arg;
     83 	struct	intrhand *ih_next;
     84 	int	ih_ipl;
     85 	int	ih_virq;
     86 };
     87 
     88 void softint_fast_dispatch(struct lwp *, int);
     89 
     90 #define softint_init_md		powerpc_softint_init_md
     91 #define softint_trigger		powerpc_softint_trigger
     92 
     93 #ifdef __IMASK_T
     94 typedef __IMASK_T imask_t;
     95 #else
     96 typedef uint32_t imask_t;
     97 #endif
     98 
     99 extern imask_t imask[];
    100 
    101 #define NVIRQ		(sizeof(imask_t)*8)	/* 32 virtual IRQs */
    102 #ifndef NIRQ
    103 #define NIRQ		128	/* up to 128 HW IRQs */
    104 #endif
    105 
    106 #define HWIRQ_MAX       (NVIRQ - 1)
    107 #define HWIRQ_MASK     	(~(imask_t)0 >> 1)
    108 
    109 #define	PIC_VIRQ_TO_MASK(v)	__BIT(HWIRQ_MAX - (v))
    110 #define PIC_VIRQ_MS_PENDING(p)	__builtin_clz(p)
    111 
    112 #endif /* !_MODULE */
    113 
    114 #define spl0()		spllower(0)
    115 
    116 typedef int ipl_t;
    117 typedef struct {
    118 	ipl_t _ipl;
    119 } ipl_cookie_t;
    120 
    121 static inline ipl_cookie_t
    122 makeiplcookie(ipl_t ipl)
    123 {
    124 
    125 	return (ipl_cookie_t){._ipl = ipl};
    126 }
    127 
    128 static inline int
    129 splraiseipl(ipl_cookie_t icookie)
    130 {
    131 
    132 	return splraise(icookie._ipl);
    133 }
    134 
    135 #include <sys/spl.h>
    136 
    137 #endif /* _LOCORE */
    138 
    139 #endif /* POWERPC_INTR_MACHDEP_H */
    140