sys/i386/include/ipl.h

   1 /*-
   2  * Copyright (c) 1993 The Regents of the University of California.
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by the University of
  16  *      California, Berkeley and its contributors.
  17  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  *
  33  * $FreeBSD: src/sys/i386/include/ipl.h,v 1.17.2.3 2002/12/17 18:04:02 sam Exp $
  34  * $DragonFly: src/sys/i386/include/Attic/ipl.h,v 1.5 2003/07/12 17:54:34 dillon Exp $
  35  */
  36
  37 #ifndef _MACHINE_IPL_H_
  38 #define _MACHINE_IPL_H_
  39
  40 #ifdef APIC_IO
  41 #include <i386/isa/apic_ipl.h>
  42 #else
  43 #include <i386/isa/icu_ipl.h>
  44 #endif
  45
  46 /*
  47  * Software interrupt bit numbers in priority order.  The priority only
  48  * determines which swi will be dispatched next; a higher priority swi
  49  * may be dispatched when a nested h/w interrupt handler returns.
  50  */
  51 #define SWI_TTY         (NHWI + 0)
  52 #define SWI_NET         (NHWI + 1)
  53 #define SWI_CAMNET      (NHWI + 2)
  54 #define SWI_CRYPTO      SWI_CAMNET
  55 #define SWI_CAMBIO      (NHWI + 3)
  56 #define SWI_VM          (NHWI + 4)
  57 #define SWI_TQ          (NHWI + 5)
  58 #define SWI_CLOCK       (NHWI + 6)
  59 #define NSWI            7
  60
  61 /*
  62  * Corresponding interrupt-pending bits for ipending.
  63  */
  64 #define SWI_TTY_PENDING         (1 << SWI_TTY)
  65 #define SWI_NET_PENDING         (1 << SWI_NET)
  66 #define SWI_CAMNET_PENDING      (1 << SWI_CAMNET)
  67 #define SWI_CRYPTO_PENDING      SWI_CAMNET_PENDING
  68 #define SWI_CAMBIO_PENDING      (1 << SWI_CAMBIO)
  69 #define SWI_VM_PENDING          (1 << SWI_VM)
  70 #define SWI_TQ_PENDING          (1 << SWI_TQ)
  71 #define SWI_CLOCK_PENDING       (1 << SWI_CLOCK)
  72
  73 /*
  74  * Corresponding interrupt-disable masks for cpl.  The ordering is now by
  75  * inclusion (where each mask is considered as a set of bits).  Everything
  76  * except SWI_CLOCK_MASK includes SWI_LOW_MASK so that softclock() and low
  77  * priority swi's don't run while other swi handlers are running and timeout
  78  * routines can call swi handlers.  SWI_TTY_MASK includes SWI_NET_MASK in
  79  * case tty interrupts are processed at splsofttty() for a tty that is in
  80  * SLIP or PPP line discipline (this is weaker than merging net_imask with
  81  * tty_imask in isa.c - splimp() must mask hard and soft tty interrupts, but
  82  * spltty() apparently only needs to mask soft net interrupts).
  83  */
  84 #define SWI_TTY_MASK    (SWI_TTY_PENDING | SWI_LOW_MASK | SWI_NET_MASK)
  85 #define SWI_CAMNET_MASK (SWI_CAMNET_PENDING | SWI_LOW_MASK)
  86 #define SWI_CRYPTO_MASK SWI_CAMNET_MASK
  87 #define SWI_CAMBIO_MASK (SWI_CAMBIO_PENDING | SWI_LOW_MASK)
  88 #define SWI_NET_MASK    (SWI_NET_PENDING | SWI_LOW_MASK)
  89 #define SWI_VM_MASK     (SWI_VM_PENDING | SWI_LOW_MASK)
  90 #define SWI_TQ_MASK     (SWI_TQ_PENDING | SWI_LOW_MASK)
  91 #define SWI_CLOCK_MASK  SWI_CLOCK_PENDING
  92 #define SWI_LOW_MASK    (SWI_TQ_PENDING | SWI_CLOCK_MASK)
  93 #define SWI_MASK        (~HWI_MASK)
  94
  95 #ifndef LOCORE
  96
  97 /*
  98  * cpl is preserved by interrupt handlers so it is effectively nonvolatile.
  99  * ipending and idelayed are changed by interrupt handlers so they are
 100  * volatile.
 101  */
 102 #ifdef notyet /* in <sys/interrupt.h> until pci drivers stop hacking on them */
 103 extern  unsigned bio_imask;     /* group of interrupts masked with splbio() */
 104 #endif
 105 #ifdef SMP
 106 extern  unsigned cil;           /* current INTerrupt level mask */
 107 #endif
 108 extern  volatile unsigned idelayed;     /* interrupts to become pending */
 109 extern  volatile unsigned ipending;     /* active interrupts masked by cpl */
 110 #ifdef notyet /* in <sys/systm.h> until pci drivers stop hacking on them */
 111 extern  unsigned net_imask;     /* group of interrupts masked with splimp() */
 112 extern  unsigned stat_imask;    /* interrupts masked with splstatclock() */
 113 extern  unsigned tty_imask;     /* group of interrupts masked with spltty() */
 114 #endif
 115
 116 #endif /* !LOCORE */
 117
 118 #endif /* !_MACHINE_IPL_H_ */