sys/arch/mac68k/include/intr.h

   1 /*      $NetBSD: intr.h,v 1.30 2008/06/19 13:56:22 tsutsui Exp $        */
   2
   3 /*
   4  * Copyright (C) 1997 Scott Reynolds
   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  * 3. The name of the author may not be used to endorse or promote products
  16  *    derived from this software without specific prior written permission.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  19  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  20  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  21  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  22  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  23  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  24  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  25  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  26  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  27  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  28  */
  29
  30 #ifndef _MAC68K_INTR_H_
  31 #define _MAC68K_INTR_H_
  32
  33 #include <machine/psl.h>
  34
  35 #ifdef _KERNEL
  36
  37 /* spl0 requires checking for software interrupts */
  38
  39 #define IPL_NONE        0
  40 #define IPL_SOFTCLOCK   1
  41 #define IPL_SOFTBIO     2
  42 #define IPL_SOFTNET     3
  43 #define IPL_SOFTSERIAL  4
  44 #define IPL_VM          5
  45 #define IPL_SCHED       6
  46 #define IPL_HIGH        7
  47 #define NIPL            8
  48
  49 /*
  50  * This array contains the appropriate PSL_S|PSL_IPL? values
  51  * to raise interrupt priority to the requested level.
  52  */
  53 extern uint16_t ipl2psl_table[NIPL];
  54
  55 /* These spl calls are _not_ to be used by machine-independent code. */
  56 #define splzs()         splserial()
  57
  58 /*
  59  * These should be used for:
  60  * 1) ensuring mutual exclusion (why use processor level?)
  61  * 2) allowing faster devices to take priority
  62  */
  63
  64 /* watch out for side effects */
  65 #define splx(s)         ((s) & PSL_IPL ? _spl(s) : spl0())
  66
  67
  68 typedef int ipl_t;
  69 typedef struct {
  70         uint16_t _ipl;
  71 } ipl_cookie_t;
  72
  73 static inline ipl_cookie_t
  74 makeiplcookie(ipl_t ipl)
  75 {
  76
  77         return (ipl_cookie_t){._ipl = ipl};
  78 }
  79
  80 static inline int
  81 splraiseipl(ipl_cookie_t icookie)
  82 {
  83
  84         return _splraise(ipl2psl_table[icookie._ipl]);
  85 }
  86
  87 #include <sys/spl.h>
  88
  89 /* intr.c */
  90 void    intr_init(void);
  91 void    intr_establish(int (*)(void *), void *, int);
  92 void    intr_disestablish(int);
  93 void    intr_dispatch(int);
  94
  95 /* locore.s */
  96 int     spl0(void);
  97 #endif /* _KERNEL */
  98
  99 #endif /* _MAC68K_INTR_H_ */