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      1 /*	$NetBSD: intr.h,v 1.19 2022/07/11 09:39:10 martin 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 1.19 2022/07/11 09:39:10 martin Exp $");
     32 #endif
     33 
     34 #ifndef _POWERPC_INTR_MACHDEP_H_
     35 #define _POWERPC_INTR_MACHDEP_H_
     36 
     37 #if 0	/* PR port-powerpc/56922: fast softints are broken on powerpc */
     38 #define	__HAVE_FAST_SOFTINTS	1
     39 #endif
     40 
     41 
     42 /* Interrupt priority `levels'. */
     43 #define	IPL_NONE		0	/* nothing */
     44 #define	IPL_SOFTCLOCK		1	/* timeouts */
     45 #define	IPL_SOFTBIO		2	/* block I/O */
     46 #define	IPL_SOFTNET		3	/* protocol stacks */
     47 #define	IPL_SOFTSERIAL		4	/* serial */
     48 #define	IPL_VM			5	/* memory allocation */
     49 #define	IPL_SCHED		6
     50 #define	IPL_HIGH		7	/* everything */
     51 #define	NIPL			8
     52 
     53 /* Interrupt sharing types. */
     54 #define	IST_NONE		0	/* none */
     55 #define	IST_PULSE		1	/* pulsed */
     56 #define	IST_EDGE		2	/* falling edge triggered */
     57 #define	IST_LEVEL		3	/* low level triggered */
     58 
     59 #define IST_EDGE_FALLING	IST_EDGE
     60 #define IST_EDGE_RISING		4	/* rising edge triggered */
     61 #define IST_LEVEL_LOW		IST_LEVEL
     62 #define IST_LEVEL_HIGH		5	/* high level triggered */
     63 
     64 #if !defined(_LOCORE)
     65 void *	intr_establish(int, int, int, int (*)(void *), void *);
     66 void *	intr_establish_xname(int, int, int, int (*)(void *), void *,
     67 	    const char *);
     68 void	intr_disestablish(void *);
     69 const char *
     70 	intr_typename(int);
     71 
     72 int	splraise(int);
     73 int	spllower(int);
     74 void	splx(int);
     75 
     76 #if !defined(_MODULE)
     77 
     78 #include <powerpc/softint.h>
     79 
     80 void	genppc_cpu_configure(void);
     81 
     82 /*
     83  * Interrupt handler chains.  intr_establish() inserts a handler into
     84  * the list.  The handler is called with its (single) argument.
     85  */
     86 struct intrhand {
     87 	int	(*ih_fun)(void *);
     88 	void	*ih_arg;
     89 	struct	intrhand *ih_next;
     90 	int	ih_ipl;
     91 	int	ih_virq;
     92 	char	ih_xname[INTRDEVNAMEBUF];
     93 };
     94 
     95 void softint_fast_dispatch(struct lwp *, int);
     96 
     97 #ifdef __HAVE_FAST_SOFTINTS
     98 #define softint_init_md		powerpc_softint_init_md
     99 #define softint_trigger		powerpc_softint_trigger
    100 #endif
    101 
    102 #ifdef __IMASK_T
    103 typedef __IMASK_T imask_t;
    104 #else
    105 typedef uint32_t imask_t;
    106 #endif
    107 
    108 #define NVIRQ		(sizeof(imask_t)*8)	/* 32 virtual IRQs */
    109 #ifndef NIRQ
    110 #define NIRQ		256	/* up to 256 HW IRQs */
    111 #endif
    112 
    113 #define HWIRQ_MAX       (NVIRQ - 1)
    114 #define HWIRQ_MASK     	(~(imask_t)0 >> 1)
    115 
    116 #define	PIC_VIRQ_TO_MASK(v)	__BIT(HWIRQ_MAX - (v))
    117 #define PIC_VIRQ_MS_PENDING(p)	__builtin_clz(p)
    118 
    119 #endif /* !_MODULE */
    120 
    121 #define spl0()		spllower(0)
    122 
    123 typedef int ipl_t;
    124 typedef struct {
    125 	ipl_t _ipl;
    126 } ipl_cookie_t;
    127 
    128 static __inline ipl_cookie_t
    129 makeiplcookie(ipl_t ipl)
    130 {
    131 
    132 	return (ipl_cookie_t){._ipl = ipl};
    133 }
    134 
    135 static __inline int
    136 splraiseipl(ipl_cookie_t icookie)
    137 {
    138 
    139 	return splraise(icookie._ipl);
    140 }
    141 
    142 #include <sys/spl.h>
    143 
    144 #endif /* _LOCORE */
    145 
    146 #endif /* _POWERPC_INTR_MACHDEP_H_ */
    147