sys/arch/hp700/include/intr.h

   1 /*      $NetBSD: intr.h,v 1.14 2009/05/07 08:16:50 skrll Exp $  */
   2
   3 /*-
   4  * Copyright (c) 1998, 2001, 2002 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by Charles M. Hannum, and by Jason R. Thorpe, and by Matthew Fredette.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  29  * POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 #ifndef _HP700_INTR_H_
  33 #define _HP700_INTR_H_
  34
  35 #include <machine/psl.h>
  36
  37 /* Interrupt priority `levels'. */
  38 #define IPL_NONE        7       /* nothing */
  39 #define IPL_SOFTCLOCK   6       /* timeouts */
  40 #define IPL_SOFTBIO     5       /* block I/o */
  41 #define IPL_SOFTNET     4       /* protocol stacks */
  42 #define IPL_SOFTSERIAL  3       /* serial */
  43 #define IPL_VM          2       /* memory allocation, low I/O */
  44 #define IPL_SCHED       1       /* clock, medium I/O */
  45 #define IPL_HIGH        0       /* everything */
  46 #define NIPL            8
  47
  48 /* Interrupt sharing types. */
  49 #define IST_NONE        0       /* none */
  50 #define IST_PULSE       1       /* pulsed */
  51 #define IST_EDGE        2       /* edge-triggered */
  52 #define IST_LEVEL       3       /* level-triggered */
  53
  54 #ifndef _LOCORE
  55
  56 /* The priority level masks. */
  57 extern int imask[NIPL];
  58
  59 /* The current priority level. */
  60 extern volatile int cpl;
  61
  62 /* The asynchronous system trap flag. */
  63 extern volatile int astpending;
  64
  65 /* The softnet mask. */
  66 extern int softnetmask;
  67
  68 /*
  69  * Add a mask to cpl, and return the old value of cpl.
  70  */
  71 static __inline int
  72 splraise(register int ncpl)
  73 {
  74         register int ocpl = cpl;
  75
  76         cpl = ocpl | ncpl;
  77         __insn_barrier();
  78
  79         return (ocpl);
  80 }
  81
  82 /* spllower() is in locore.S */
  83 void spllower(int);
  84
  85 /*
  86  * Miscellaneous
  87  */
  88 #define spl0()          spllower(0)
  89 #define splx(x)         spllower(x)
  90
  91 typedef int ipl_t;
  92 typedef struct {
  93         ipl_t _ipl;
  94 } ipl_cookie_t;
  95
  96 static inline ipl_cookie_t
  97 makeiplcookie(ipl_t ipl)
  98 {
  99
 100         return (ipl_cookie_t){._ipl = ipl};
 101 }
 102
 103 static inline int
 104 splraiseipl(ipl_cookie_t icookie)
 105 {
 106
 107         return splraise(imask[icookie._ipl]);
 108 }
 109
 110 #include <sys/spl.h>
 111
 112 #define setsoftast()    (astpending = 1)
 113 #define setsoftnet()    hp700_intr_schedule(softnetmask)
 114
 115 void    hp700_intr_schedule(int);
 116
 117 #endif /* !_LOCORE */
 118
 119 #endif /* !_HP700_INTR_H_ */