sys/platform/pc32/isa/ipl_funcs.c

   1 /*-
   2  * Copyright (c) 1997 Bruce Evans.
   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  *
  14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  24  * SUCH DAMAGE.
  25  *
  26  * $FreeBSD: src/sys/i386/isa/ipl_funcs.c,v 1.32.2.5 2002/12/17 18:04:02 sam Exp $
  27  * $DragonFly: src/sys/platform/pc32/isa/ipl_funcs.c,v 1.10 2005/06/16 21:12:47 dillon Exp $
  28  */
  29
  30 #include <sys/param.h>
  31 #include <sys/systm.h>
  32 #include <sys/kernel.h>
  33 #include <sys/sysctl.h>
  34 #include <sys/proc.h>
  35 #include <machine/ipl.h>
  36 #include <machine/globaldata.h>
  37 #include <machine/pcb.h>
  38 #include <i386/isa/intr_machdep.h>
  39
  40 /*
  41  * Bits in the ipending bitmap variable must be set atomically because
  42  * ipending may be manipulated by interrupts or other cpu's without holding
  43  * any locks.
  44  *
  45  * Note: setbits uses a locked or, making simple cases MP safe.
  46  */
  47 #define DO_SETBITS(name, var, bits)                                     \
  48 void name(void)                                                         \
  49 {                                                                       \
  50         struct mdglobaldata *gd = mdcpu;                                \
  51         atomic_set_int_nonlocked(var, bits);                            \
  52         atomic_set_int_nonlocked(&gd->mi.gd_reqflags, RQF_INTPEND);     \
  53 }                                                                       \
  54
  55 DO_SETBITS(setdelayed,   &gd->gd_ipending, loadandclear(&gd->gd_idelayed))
  56
  57 DO_SETBITS(setsoftcamnet,&gd->gd_ipending, SWI_CAMNET_PENDING)
  58 DO_SETBITS(setsoftcambio,&gd->gd_ipending, SWI_CAMBIO_PENDING)
  59 DO_SETBITS(setsoftclock, &gd->gd_ipending, SWI_CLOCK_PENDING)
  60 DO_SETBITS(setsoftnet,   &gd->gd_ipending, SWI_NET_PENDING)
  61 DO_SETBITS(setsofttty,   &gd->gd_ipending, SWI_TTY_PENDING)
  62 DO_SETBITS(setsoftvm,    &gd->gd_ipending, SWI_VM_PENDING)
  63 DO_SETBITS(setsofttq,    &gd->gd_ipending, SWI_TQ_PENDING)
  64 DO_SETBITS(setsoftcrypto,&gd->gd_ipending, SWI_CRYPTO_PENDING)
  65
  66 DO_SETBITS(schedsoftcamnet, &gd->gd_idelayed, SWI_CAMNET_PENDING)
  67 DO_SETBITS(schedsoftcambio, &gd->gd_idelayed, SWI_CAMBIO_PENDING)
  68 DO_SETBITS(schedsoftnet, &gd->gd_idelayed, SWI_NET_PENDING)
  69 DO_SETBITS(schedsofttty, &gd->gd_idelayed, SWI_TTY_PENDING)
  70 DO_SETBITS(schedsoftvm,  &gd->gd_idelayed, SWI_VM_PENDING)
  71 DO_SETBITS(schedsofttq,  &gd->gd_idelayed, SWI_TQ_PENDING)
  72 /* YYY schedsoft what? */
  73
  74 unsigned
  75 softclockpending(void)
  76 {
  77         return ((mdcpu->gd_ipending | mdcpu->gd_fpending) & SWI_CLOCK_PENDING);
  78 }
  79