sys/arch/evbarm/include/intr.h

   1 /*      $NetBSD: intr.h,v 1.26 2014/03/13 23:48:38 matt Exp $   */
   2
   3 /*
   4  * Copyright (c) 2001, 2003 Wasabi Systems, Inc.
   5  * All rights reserved.
   6  *
   7  * Written by Jason R. Thorpe for Wasabi Systems, Inc.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in the
  16  *    documentation and/or other materials provided with the distribution.
  17  * 3. All advertising materials mentioning features or use of this software
  18  *    must display the following acknowledgement:
  19  *      This product includes software developed for the NetBSD Project by
  20  *      Wasabi Systems, Inc.
  21  * 4. The name of Wasabi Systems, Inc. may not be used to endorse
  22  *    or promote products derived from this software without specific prior
  23  *    written permission.
  24  *
  25  * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
  26  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  27  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  28  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL WASABI SYSTEMS, INC
  29  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  30  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  31  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  32  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  33  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  34  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  35  * POSSIBILITY OF SUCH DAMAGE.
  36  */
  37
  38 #ifndef _EVBARM_INTR_H_
  39 #define _EVBARM_INTR_H_
  40
  41 #ifdef _KERNEL
  42
  43 /* Interrupt priority "levels". */
  44 #define IPL_NONE        0               /* nothing */
  45 #define IPL_SOFTCLOCK   1               /* clock */
  46 #define IPL_SOFTBIO     2               /* block I/O */
  47 #define IPL_SOFTNET     3               /* software network interrupt */
  48 #define IPL_SOFTSERIAL  4               /* software serial interrupt */
  49 #define IPL_VM          5               /* memory allocation */
  50 #define IPL_SCHED       6               /* clock interrupt */
  51 #define IPL_HIGH        7               /* everything */
  52
  53 #define NIPL            8
  54
  55 /* Interrupt sharing types. */
  56 #define IST_NONE        0       /* none */
  57 #define IST_PULSE       1       /* pulsed */
  58 #define IST_EDGE        2       /* edge-triggered */
  59 #define IST_LEVEL       3       /* level-triggered */
  60
  61 #define IST_LEVEL_LOW   IST_LEVEL
  62 #define IST_LEVEL_HIGH  4
  63 #define IST_EDGE_FALLING IST_EDGE
  64 #define IST_EDGE_RISING 5
  65 #define IST_EDGE_BOTH   6
  66 #define IST_SOFT        7
  67
  68 #define IST_MPSAFE      0x100   /* interrupt is MPSAFE */
  69
  70 #ifndef _LOCORE
  71
  72 #include <sys/queue.h>
  73
  74 #if defined(_LKM)
  75
  76 int     _splraise(int);
  77 int     _spllower(int);
  78 void    splx(int);
  79
  80 #else   /* _LKM */
  81
  82 #include "opt_arm_intr_impl.h"
  83
  84 #if defined(ARM_INTR_IMPL)
  85
  86 /*
  87  * Each board needs to define the following functions:
  88  *
  89  * int  _splraise(int);
  90  * int  _spllower(int);
  91  * void splx(int);
  92  *
  93  * These may be defined as functions, static inline functions, or macros,
  94  * but there must be a _spllower() and splx() defined as functions callable
  95  * from assembly language (for cpu_switch()).  However, since it's quite
  96  * useful to be able to inline splx(), you could do something like the
  97  * following:
  98  *
  99  * in <boardtype>_intr.h:
 100  *      static inline int
 101  *      boardtype_splx(int spl)
 102  *      {...}
 103  *
 104  *      #define splx(nspl)      boardtype_splx(nspl)
 105  *      ...
 106  * and in boardtype's machdep code:
 107  *
 108  *      ...
 109  *      #undef splx
 110  *      int
 111  *      splx(int spl)
 112  *      {
 113  *              return boardtype_splx(spl);
 114  *      }
 115  */
 116
 117 #include ARM_INTR_IMPL
 118
 119 #else /* ARM_INTR_IMPL */
 120
 121 #error ARM_INTR_IMPL not defined.
 122
 123 #endif  /* ARM_INTR_IMPL */
 124
 125 #endif /* _LKM */
 126
 127 typedef uint8_t ipl_t;
 128 typedef struct {
 129         ipl_t _ipl;
 130 } ipl_cookie_t;
 131
 132 static inline ipl_cookie_t
 133 makeiplcookie(ipl_t ipl)
 134 {
 135
 136         return (ipl_cookie_t){._ipl = ipl};
 137 }
 138
 139 static inline int
 140 splraiseipl(ipl_cookie_t icookie)
 141 {
 142
 143         return _splraise(icookie._ipl);
 144 }
 145
 146 #define spl0()          _spllower(IPL_NONE)
 147
 148 #include <sys/spl.h>
 149
 150 #endif /* ! _LOCORE */
 151
 152 #endif /* _KERNEL */
 153
 154 #endif  /* _EVBARM_INTR_H_ */