sys/platform/pc32/isa/intr_machdep.c

   1 /*-
   2  * Copyright (c) 1991 The Regents of the University of California.
   3  * All rights reserved.
   4  *
   5  * This code is derived from software contributed to Berkeley by
   6  * William Jolitz.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. All advertising materials mentioning features or use of this software
  17  *    must display the following acknowledgement:
  18  *      This product includes software developed by the University of
  19  *      California, Berkeley and its contributors.
  20  * 4. Neither the name of the University nor the names of its contributors
  21  *    may be used to endorse or promote products derived from this software
  22  *    without specific prior written permission.
  23  *
  24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  34  * SUCH DAMAGE.
  35  *
  36  *      from: @(#)isa.c 7.2 (Berkeley) 5/13/91
  37  * $FreeBSD: src/sys/i386/isa/intr_machdep.c,v 1.29.2.5 2001/10/14 06:54:27 luigi Exp $
  38  * $DragonFly: src/sys/platform/pc32/isa/intr_machdep.c,v 1.47 2006/11/07 06:43:24 dillon Exp $
  39  */
  40 /*
  41  * This file contains an aggregated module marked:
  42  * Copyright (c) 1997, Stefan Esser <se@freebsd.org>
  43  * All rights reserved.
  44  * See the notice for details.
  45  */
  46
  47 #include "use_isa.h"
  48 #include "opt_auto_eoi.h"
  49
  50 #include <sys/param.h>
  51 #ifndef SMP
  52 #include <machine/lock.h>
  53 #endif
  54 #include <sys/systm.h>
  55 #include <sys/syslog.h>
  56 #include <sys/malloc.h>
  57 #include <sys/errno.h>
  58 #include <sys/interrupt.h>
  59 #include <machine/ipl.h>
  60 #include <machine/md_var.h>
  61 #include <machine/segments.h>
  62 #include <sys/bus.h>
  63 #include <machine/globaldata.h>
  64 #include <sys/proc.h>
  65 #include <sys/thread2.h>
  66 #include <sys/machintr.h>
  67
  68 #include <machine/smp.h>
  69 #include <bus/isa/i386/isa.h>
  70 #include <machine_base/icu/icu.h>
  71
  72 #if NISA > 0
  73 #include <bus/isa/isavar.h>
  74 #endif
  75 #include <machine_base/isa/intr_machdep.h>
  76 #include <sys/interrupt.h>
  77 #include <machine/clock.h>
  78 #include <machine/cpu.h>
  79
  80 /* XXX should be in suitable include files */
  81 #define ICU_IMR_OFFSET          1               /* IO_ICU{1,2} + 1 */
  82
  83 #ifdef APIC_IO
  84 /*
  85  * This is to accommodate "mixed-mode" programming for
  86  * motherboards that don't connect the 8254 to the IO APIC.
  87  */
  88 #define AUTO_EOI_1      1
  89 #endif
  90
  91 static void     init_i8259(void);
  92
  93 #define NMI_PARITY (1 << 7)
  94 #define NMI_IOCHAN (1 << 6)
  95 #define ENMI_WATCHDOG (1 << 7)
  96 #define ENMI_BUSTIMER (1 << 6)
  97 #define ENMI_IOSTATUS (1 << 5)
  98
  99 /*
 100  * Handle a NMI, possibly a machine check.
 101  * return true to panic system, false to ignore.
 102  */
 103 int
 104 isa_nmi(int cd)
 105 {
 106         int retval = 0;
 107         int isa_port = inb(0x61);
 108         int eisa_port = inb(0x461);
 109
 110         log(LOG_CRIT, "NMI ISA %x, EISA %x\n", isa_port, eisa_port);
 111
 112         if (isa_port & NMI_PARITY) {
 113                 log(LOG_CRIT, "RAM parity error, likely hardware failure.");
 114                 retval = 1;
 115         }
 116
 117         if (isa_port & NMI_IOCHAN) {
 118                 log(LOG_CRIT, "I/O channel check, likely hardware failure.");
 119                 retval = 1;
 120         }
 121
 122         /*
 123          * On a real EISA machine, this will never happen.  However it can
 124          * happen on ISA machines which implement XT style floating point
 125          * error handling (very rare).  Save them from a meaningless panic.
 126          */
 127         if (eisa_port == 0xff)
 128                 return(retval);
 129
 130         if (eisa_port & ENMI_WATCHDOG) {
 131                 log(LOG_CRIT, "EISA watchdog timer expired, likely hardware failure.");
 132                 retval = 1;
 133         }
 134
 135         if (eisa_port & ENMI_BUSTIMER) {
 136                 log(LOG_CRIT, "EISA bus timeout, likely hardware failure.");
 137                 retval = 1;
 138         }
 139
 140         if (eisa_port & ENMI_IOSTATUS) {
 141                 log(LOG_CRIT, "EISA I/O port status error.");
 142                 retval = 1;
 143         }
 144         return(retval);
 145 }
 146
 147 /*
 148  *  ICU reinitialize when ICU configuration has lost.
 149  */
 150 void
 151 icu_reinit(void)
 152 {
 153         int i;
 154
 155         init_i8259();
 156         for (i = 0; i < MAX_HARDINTS; ++i) {
 157                 if (count_registered_ints(i))
 158                         machintr_intren(i);
 159         }
 160 }
 161
 162 /*
 163  * Fill in default interrupt table (in case of spurious interrupt
 164  * during configuration of kernel, setup interrupt control unit
 165  */
 166 void
 167 isa_defaultirq(void)
 168 {
 169         int i;
 170
 171         /* icu vectors */
 172         for (i = 0; i < MAX_HARDINTS; i++)
 173                 machintr_vector_setdefault(i);
 174         init_i8259();
 175 }
 176
 177 static void
 178 init_i8259(void)
 179 {
 180
 181         /* initialize 8259's */
 182         outb(IO_ICU1, 0x11);            /* reset; program device, four bytes */
 183         outb(IO_ICU1+ICU_IMR_OFFSET, IDT_OFFSET);       /* starting at this vector index */
 184         outb(IO_ICU1+ICU_IMR_OFFSET, 1 << ICU_IRQ_SLAVE); /* slave on line 2 */
 185 #ifdef AUTO_EOI_1
 186         outb(IO_ICU1+ICU_IMR_OFFSET, 2 | 1);            /* auto EOI, 8086 mode */
 187 #else
 188         outb(IO_ICU1+ICU_IMR_OFFSET, 1);                /* 8086 mode */
 189 #endif
 190         outb(IO_ICU1+ICU_IMR_OFFSET, 0xff);             /* leave interrupts masked */
 191         outb(IO_ICU1, 0x0a);            /* default to IRR on read */
 192         outb(IO_ICU1, 0xc0 | (3 - 1));  /* pri order 3-7, 0-2 (com2 first) */
 193         outb(IO_ICU2, 0x11);            /* reset; program device, four bytes */
 194         outb(IO_ICU2+ICU_IMR_OFFSET, IDT_OFFSET+8); /* staring at this vector index */
 195         outb(IO_ICU2+ICU_IMR_OFFSET, ICU_IRQ_SLAVE);
 196 #ifdef AUTO_EOI_2
 197         outb(IO_ICU2+ICU_IMR_OFFSET, 2 | 1);            /* auto EOI, 8086 mode */
 198 #else
 199         outb(IO_ICU2+ICU_IMR_OFFSET,1);         /* 8086 mode */
 200 #endif
 201         outb(IO_ICU2+ICU_IMR_OFFSET, 0xff);          /* leave interrupts masked */
 202         outb(IO_ICU2, 0x0a);            /* default to IRR on read */
 203 }
 204
 205 #if NISA > 0
 206 /*
 207  * Return a bitmap of the current interrupt requests.  This is 8259-specific
 208  * and is only suitable for use at probe time.
 209  */
 210 intrmask_t
 211 isa_irq_pending(void)
 212 {
 213         u_char irr1;
 214         u_char irr2;
 215
 216         irr1 = inb(IO_ICU1);
 217         irr2 = inb(IO_ICU2);
 218         return ((irr2 << 8) | irr1);
 219 }
 220
 221 #endif
 222
 223 /* The following notice applies beyond this point in the file */
 224
 225 /*
 226  * Copyright (c) 1997, Stefan Esser <se@freebsd.org>
 227  * All rights reserved.
 228  *
 229  * Redistribution and use in source and binary forms, with or without
 230  * modification, are permitted provided that the following conditions
 231  * are met:
 232  * 1. Redistributions of source code must retain the above copyright
 233  *    notice unmodified, this list of conditions, and the following
 234  *    disclaimer.
 235  * 2. Redistributions in binary form must reproduce the above copyright
 236  *    notice, this list of conditions and the following disclaimer in the
 237  *    documentation and/or other materials provided with the distribution.
 238  *
 239  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 240  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 241  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 242  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 243  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 244  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 245  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 246  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 247  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 248  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 249  *
 250  * $FreeBSD: src/sys/i386/isa/intr_machdep.c,v 1.29.2.5 2001/10/14 06:54:27 luigi Exp $
 251  *
 252  */
 253
 254 #ifdef SMP
 255 /*
 256  * forward_fast_remote()
 257  *
 258  *      This function is called from the receiving end of an IPIQ when a
 259  *      remote cpu wishes to forward a fast interrupt to us.  All we have to
 260  *      do is set the interrupt pending and let the IPI's doreti deal with it.
 261  */
 262 void
 263 forward_fastint_remote(void *arg)
 264 {
 265     int irq = (int)arg;
 266     struct mdglobaldata *gd = mdcpu;
 267
 268     atomic_set_int_nonlocked(&gd->gd_fpending, 1 << irq);
 269     atomic_set_int_nonlocked(&gd->mi.gd_reqflags, RQF_INTPEND);
 270 }
 271
 272 #endif