/*- * Copyright (c) 1991 The Regents of the University of California. * All rights reserved. * * This code is derived from software contributed to Berkeley by * William Jolitz. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * from: @(#)isa.c 7.2 (Berkeley) 5/13/91 * $FreeBSD$ */ #include "opt_auto_eoi.h" #include "isa.h" #include #include #ifndef SMP #include #endif #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #if defined(APIC_IO) #include #include /** FAST_HI */ #include #endif /* APIC_IO */ #ifdef PC98 #include #include #include #else #include #endif #include #if NISA > 0 #include #endif #include #include #ifdef APIC_IO #include #endif #include "mca.h" #if NMCA > 0 #include #endif /* * Per-interrupt data. */ u_long *intr_countp[ICU_LEN]; /* pointers to interrupt counters */ driver_intr_t *intr_handler[ICU_LEN]; /* first level interrupt handler */ struct ithd *ithds[ICU_LEN]; /* real interrupt handler */ void *intr_unit[ICU_LEN]; static inthand_t *fastintr[ICU_LEN] = { &IDTVEC(fastintr0), &IDTVEC(fastintr1), &IDTVEC(fastintr2), &IDTVEC(fastintr3), &IDTVEC(fastintr4), &IDTVEC(fastintr5), &IDTVEC(fastintr6), &IDTVEC(fastintr7), &IDTVEC(fastintr8), &IDTVEC(fastintr9), &IDTVEC(fastintr10), &IDTVEC(fastintr11), &IDTVEC(fastintr12), &IDTVEC(fastintr13), &IDTVEC(fastintr14), &IDTVEC(fastintr15), #if defined(APIC_IO) &IDTVEC(fastintr16), &IDTVEC(fastintr17), &IDTVEC(fastintr18), &IDTVEC(fastintr19), &IDTVEC(fastintr20), &IDTVEC(fastintr21), &IDTVEC(fastintr22), &IDTVEC(fastintr23), #endif /* APIC_IO */ }; static inthand_t *slowintr[ICU_LEN] = { &IDTVEC(intr0), &IDTVEC(intr1), &IDTVEC(intr2), &IDTVEC(intr3), &IDTVEC(intr4), &IDTVEC(intr5), &IDTVEC(intr6), &IDTVEC(intr7), &IDTVEC(intr8), &IDTVEC(intr9), &IDTVEC(intr10), &IDTVEC(intr11), &IDTVEC(intr12), &IDTVEC(intr13), &IDTVEC(intr14), &IDTVEC(intr15), #if defined(APIC_IO) &IDTVEC(intr16), &IDTVEC(intr17), &IDTVEC(intr18), &IDTVEC(intr19), &IDTVEC(intr20), &IDTVEC(intr21), &IDTVEC(intr22), &IDTVEC(intr23), #endif /* APIC_IO */ }; static driver_intr_t isa_strayintr; #ifdef PC98 #define NMI_PARITY 0x04 #define NMI_EPARITY 0x02 #else #define NMI_PARITY (1 << 7) #define NMI_IOCHAN (1 << 6) #define ENMI_WATCHDOG (1 << 7) #define ENMI_BUSTIMER (1 << 6) #define ENMI_IOSTATUS (1 << 5) #endif /* * Bus attachment for the ISA PIC. */ static struct isa_pnp_id atpic_ids[] = { { 0x0000d041 /* PNP0000 */, "AT interrupt controller" }, { 0 } }; static int atpic_probe(device_t dev) { int result; if ((result = ISA_PNP_PROBE(device_get_parent(dev), dev, atpic_ids)) <= 0) device_quiet(dev); return(result); } /* * In the APIC_IO case we might be granted IRQ 2, as this is typically * consumed by chaining between the two PIC components. If we're using * the APIC, however, this may not be the case, and as such we should * free the resource. (XXX untested) * * The generic ISA attachment code will handle allocating any other resources * that we don't explicitly claim here. */ static int atpic_attach(device_t dev) { #ifdef APIC_IO int rid; struct resource *res; /* try to allocate our IRQ and then free it */ rid = 0; res = bus_alloc_resource(dev, SYS_RES_IRQ, &rid, 0, ~0, 1, 0); if (res != NULL) bus_release_resource(dev, SYS_RES_IRQ, rid, res); #endif return(0); } static device_method_t atpic_methods[] = { /* Device interface */ DEVMETHOD(device_probe, atpic_probe), DEVMETHOD(device_attach, atpic_attach), DEVMETHOD(device_detach, bus_generic_detach), DEVMETHOD(device_shutdown, bus_generic_shutdown), DEVMETHOD(device_suspend, bus_generic_suspend), DEVMETHOD(device_resume, bus_generic_resume), { 0, 0 } }; static driver_t atpic_driver = { "atpic", atpic_methods, 1, /* no softc */ }; static devclass_t atpic_devclass; DRIVER_MODULE(atpic, isa, atpic_driver, atpic_devclass, 0, 0); /* * Handle a NMI, possibly a machine check. * return true to panic system, false to ignore. */ int isa_nmi(cd) int cd; { int retval = 0; #ifdef PC98 int port = inb(0x33); log(LOG_CRIT, "NMI PC98 port = %x\n", port); if (epson_machine_id == 0x20) epson_outb(0xc16, epson_inb(0xc16) | 0x1); if (port & NMI_PARITY) { log(LOG_CRIT, "BASE RAM parity error, likely hardware failure."); retval = 1; } else if (port & NMI_EPARITY) { log(LOG_CRIT, "EXTENDED RAM parity error, likely hardware failure."); retval = 1; } else { log(LOG_CRIT, "\nNMI Resume ??\n"); } #else /* IBM-PC */ int isa_port = inb(0x61); int eisa_port = inb(0x461); log(LOG_CRIT, "NMI ISA %x, EISA %x\n", isa_port, eisa_port); #if NMCA > 0 if (MCA_system && mca_bus_nmi()) return(0); #endif if (isa_port & NMI_PARITY) { log(LOG_CRIT, "RAM parity error, likely hardware failure."); retval = 1; } if (isa_port & NMI_IOCHAN) { log(LOG_CRIT, "I/O channel check, likely hardware failure."); retval = 1; } /* * On a real EISA machine, this will never happen. However it can * happen on ISA machines which implement XT style floating point * error handling (very rare). Save them from a meaningless panic. */ if (eisa_port == 0xff) return(retval); if (eisa_port & ENMI_WATCHDOG) { log(LOG_CRIT, "EISA watchdog timer expired, likely hardware failure."); retval = 1; } if (eisa_port & ENMI_BUSTIMER) { log(LOG_CRIT, "EISA bus timeout, likely hardware failure."); retval = 1; } if (eisa_port & ENMI_IOSTATUS) { log(LOG_CRIT, "EISA I/O port status error."); retval = 1; } #endif return(retval); } /* * Create a default interrupt table to avoid problems caused by * spurious interrupts during configuration of kernel, then setup * interrupt control unit. */ void isa_defaultirq() { int i; /* icu vectors */ for (i = 0; i < ICU_LEN; i++) icu_unset(i, (driver_intr_t *)NULL); /* initialize 8259's */ #if NMCA > 0 if (MCA_system) outb(IO_ICU1, 0x19); /* reset; program device, four bytes */ else #endif outb(IO_ICU1, 0x11); /* reset; program device, four bytes */ outb(IO_ICU1+ICU_IMR_OFFSET, NRSVIDT); /* starting at this vector index */ outb(IO_ICU1+ICU_IMR_OFFSET, IRQ_SLAVE); /* slave on line 7 */ #ifdef PC98 #ifdef AUTO_EOI_1 outb(IO_ICU1+ICU_IMR_OFFSET, 0x1f); /* (master) auto EOI, 8086 mode */ #else outb(IO_ICU1+ICU_IMR_OFFSET, 0x1d); /* (master) 8086 mode */ #endif #else /* IBM-PC */ #ifdef AUTO_EOI_1 outb(IO_ICU1+ICU_IMR_OFFSET, 2 | 1); /* auto EOI, 8086 mode */ #else outb(IO_ICU1+ICU_IMR_OFFSET, 1); /* 8086 mode */ #endif #endif /* PC98 */ outb(IO_ICU1+ICU_IMR_OFFSET, 0xff); /* leave interrupts masked */ outb(IO_ICU1, 0x0a); /* default to IRR on read */ #ifndef PC98 outb(IO_ICU1, 0xc0 | (3 - 1)); /* pri order 3-7, 0-2 (com2 first) */ #endif /* !PC98 */ #if NMCA > 0 if (MCA_system) outb(IO_ICU2, 0x19); /* reset; program device, four bytes */ else #endif outb(IO_ICU2, 0x11); /* reset; program device, four bytes */ outb(IO_ICU2+ICU_IMR_OFFSET, NRSVIDT+8); /* staring at this vector index */ outb(IO_ICU2+ICU_IMR_OFFSET, ICU_SLAVEID); /* my slave id is 7 */ #ifdef PC98 outb(IO_ICU2+ICU_IMR_OFFSET,9); /* 8086 mode */ #else /* IBM-PC */ #ifdef AUTO_EOI_2 outb(IO_ICU2+ICU_IMR_OFFSET, 2 | 1); /* auto EOI, 8086 mode */ #else outb(IO_ICU2+ICU_IMR_OFFSET,1); /* 8086 mode */ #endif #endif /* PC98 */ outb(IO_ICU2+ICU_IMR_OFFSET, 0xff); /* leave interrupts masked */ outb(IO_ICU2, 0x0a); /* default to IRR on read */ } /* * Caught a stray interrupt, notify */ static void isa_strayintr(vcookiep) void *vcookiep; { int intr = (void **)vcookiep - &intr_unit[0]; /* * XXX TODO print a different message for #7 if it is for a * glitch. Glitches can be distinguished from real #7's by * testing that the in-service bit is _not_ set. The test * must be done before sending an EOI so it can't be done if * we are using AUTO_EOI_1. */ if (intrcnt[1 + intr] <= 5) log(LOG_ERR, "stray irq %d\n", intr); if (intrcnt[1 + intr] == 5) log(LOG_CRIT, "too many stray irq %d's; not logging any more\n", intr); } #if NISA > 0 /* * Return a bitmap of the current interrupt requests. This is 8259-specific * and is only suitable for use at probe time. */ intrmask_t isa_irq_pending() { u_char irr1; u_char irr2; irr1 = inb(IO_ICU1); irr2 = inb(IO_ICU2); return ((irr2 << 8) | irr1); } #endif /* * Update intrnames array with the specified name. This is used by * vmstat(8) and the like. */ static void update_intrname(int intr, char *name) { char buf[32]; char *cp; int name_index, off, strayintr; /* * Initialise strings for bitbucket and stray interrupt counters. * These have statically allocated indices 0 and 1 through ICU_LEN. */ if (intrnames[0] == '\0') { off = sprintf(intrnames, "???") + 1; for (strayintr = 0; strayintr < ICU_LEN; strayintr++) off += sprintf(intrnames + off, "stray irq%d", strayintr) + 1; } if (name == NULL) name = "???"; if (snprintf(buf, sizeof(buf), "%s irq%d", name, intr) >= sizeof(buf)) goto use_bitbucket; /* * Search for `buf' in `intrnames'. In the usual case when it is * not found, append it to the end if there is enough space (the \0 * terminator for the previous string, if any, becomes a separator). */ for (cp = intrnames, name_index = 0; cp != eintrnames && name_index < NR_INTRNAMES; cp += strlen(cp) + 1, name_index++) { if (*cp == '\0') { if (strlen(buf) >= eintrnames - cp) break; strcpy(cp, buf); goto found; } if (strcmp(cp, buf) == 0) goto found; } use_bitbucket: printf("update_intrname: counting %s irq%d as %s\n", name, intr, intrnames); name_index = 0; found: intr_countp[intr] = &intrcnt[name_index]; } int icu_setup(int intr, driver_intr_t *handler, void *arg, int flags) { #ifdef FAST_HI int select; /* the select register is 8 bits */ int vector; u_int32_t value; /* the window register is 32 bits */ #endif /* FAST_HI */ u_long ef; #if defined(APIC_IO) if ((u_int)intr >= ICU_LEN) /* no 8259 SLAVE to ignore */ #else if ((u_int)intr >= ICU_LEN || intr == ICU_SLAVEID) #endif /* APIC_IO */ if (intr_handler[intr] != isa_strayintr) return (EBUSY); ef = read_eflags(); disable_intr(); intr_handler[intr] = handler; intr_unit[intr] = arg; #ifdef FAST_HI if (flags & INTR_FAST) { vector = TPR_FAST_INTS + intr; setidt(vector, fastintr[intr], SDT_SYS386IGT, SEL_KPL, GSEL(GCODE_SEL, SEL_KPL)); } else { vector = TPR_SLOW_INTS + intr; #ifdef APIC_INTR_REORDER #ifdef APIC_INTR_HIGHPRI_CLOCK /* XXX: Hack (kludge?) for more accurate clock. */ if (intr == apic_8254_intr || intr == 8) { vector = TPR_FAST_INTS + intr; } #endif #endif setidt(vector, slowintr[intr], SDT_SYS386IGT, SEL_KPL, GSEL(GCODE_SEL, SEL_KPL)); } #ifdef APIC_INTR_REORDER set_lapic_isrloc(intr, vector); #endif /* * Reprogram the vector in the IO APIC. */ if (int_to_apicintpin[intr].ioapic >= 0) { select = int_to_apicintpin[intr].redirindex; value = io_apic_read(int_to_apicintpin[intr].ioapic, select) & ~IOART_INTVEC; io_apic_write(int_to_apicintpin[intr].ioapic, select, value | vector); } #else setidt(ICU_OFFSET + intr, flags & INTR_FAST ? fastintr[intr] : slowintr[intr], SDT_SYS386IGT, SEL_KPL, GSEL(GCODE_SEL, SEL_KPL)); #endif /* FAST_HI */ INTREN(1 << intr); write_eflags(ef); return (0); } /* * Dissociate an interrupt handler from an IRQ and set the handler to * the stray interrupt handler. The 'handler' parameter is used only * for consistency checking. */ int icu_unset(intr, handler) int intr; driver_intr_t *handler; { u_long ef; if ((u_int)intr >= ICU_LEN || handler != intr_handler[intr]) return (EINVAL); INTRDIS(1 << intr); ef = read_eflags(); disable_intr(); intr_countp[intr] = &intrcnt[1 + intr]; intr_handler[intr] = isa_strayintr; intr_unit[intr] = &intr_unit[intr]; #ifdef FAST_HI_XXX /* XXX how do I re-create dvp here? */ setidt(flags & INTR_FAST ? TPR_FAST_INTS + intr : TPR_SLOW_INTS + intr, slowintr[intr], SDT_SYS386IGT, SEL_KPL, GSEL(GCODE_SEL, SEL_KPL)); #else /* FAST_HI */ #ifdef APIC_INTR_REORDER set_lapic_isrloc(intr, ICU_OFFSET + intr); #endif setidt(ICU_OFFSET + intr, slowintr[intr], SDT_SYS386IGT, SEL_KPL, GSEL(GCODE_SEL, SEL_KPL)); #endif /* FAST_HI */ write_eflags(ef); return (0); } struct intrhand * inthand_add(const char *name, int irq, driver_intr_t handler, void *arg, int pri, int flags) { struct ithd *ithd = ithds[irq]; /* descriptor for the IRQ */ struct intrhand *head; /* chain of handlers for IRQ */ struct intrhand *idesc; /* descriptor for this handler */ struct proc *p; /* interrupt thread */ int errcode = 0; if (name == NULL) /* no name? */ panic ("anonymous interrupt"); if (ithd == NULL || ithd->it_ih == NULL) { /* first handler for this irq. */ if (ithd == NULL) { ithd = malloc(sizeof (struct ithd), M_DEVBUF, M_WAITOK); if (ithd == NULL) return (NULL); bzero(ithd, sizeof(struct ithd)); ithd->irq = irq; ithds[irq] = ithd; } /* * If we have a fast interrupt, we need to set the * handler address directly. Do that below. For a * slow interrupt, we don't need to know more details, * so do it here because it's tidier. */ if ((flags & INTR_FAST) == 0) { /* * Only create a kernel thread if we don't already * have one. */ if (ithd->it_proc == NULL) { errcode = kthread_create(ithd_loop, NULL, &p, RFSTOPPED | RFHIGHPID, "irq%d: %s", irq, name); if (errcode) panic("inthand_add: Can't create " "interrupt thread"); p->p_rtprio.type = RTP_PRIO_ITHREAD; p->p_stat = SWAIT; /* we're idle */ /* Put in linkages. */ ithd->it_proc = p; p->p_ithd = ithd; } else snprintf(ithd->it_proc->p_comm, MAXCOMLEN, "irq%d: %s", irq, name); p->p_rtprio.prio = pri; /* * The interrupt process must be in place, but * not necessarily schedulable, before we * initialize the ICU, since it may cause an * immediate interrupt. */ if (icu_setup(irq, &sched_ithd, arg, flags) != 0) panic("inthand_add: Can't initialize ICU"); } } else if ((flags & INTR_EXCL) != 0 || (ithd->it_ih->ih_flags & INTR_EXCL) != 0) { /* * We can't append the new handler if either * list ithd or new handler do not allow * interrupts to be shared. */ if (bootverbose) printf("\tdevice combination %s and %s " "doesn't support shared irq%d\n", ithd->it_ih->ih_name, name, irq); return(NULL); } else if (flags & INTR_FAST) { /* We can only have one fast interrupt by itself. */ if (bootverbose) printf("\tCan't add fast interrupt %s" " to normal interrupt %s on irq%d", name, ithd->it_ih->ih_name, irq); return (NULL); } else { /* update p_comm */ p = ithd->it_proc; if (strlen(p->p_comm) + strlen(name) < MAXCOMLEN) { strcat(p->p_comm, " "); strcat(p->p_comm, name); } else if (strlen(p->p_comm) == MAXCOMLEN) p->p_comm[MAXCOMLEN - 1] = '+'; else strcat(p->p_comm, "+"); } idesc = malloc(sizeof (struct intrhand), M_DEVBUF, M_WAITOK); if (idesc == NULL) return (NULL); bzero(idesc, sizeof (struct intrhand)); idesc->ih_handler = handler; idesc->ih_argument = arg; idesc->ih_flags = flags; idesc->ih_ithd = ithd; idesc->ih_name = malloc(strlen(name) + 1, M_DEVBUF, M_WAITOK); if (idesc->ih_name == NULL) { free(idesc, M_DEVBUF); return (NULL); } strcpy(idesc->ih_name, name); /* Slow interrupts got set up above. */ if ((flags & INTR_FAST) && (icu_setup(irq, idesc->ih_handler, idesc->ih_argument, idesc->ih_flags) != 0) ) { if (bootverbose) printf("\tinthand_add(irq%d) failed, result=%d\n", irq, errcode); free(idesc->ih_name, M_DEVBUF); free(idesc, M_DEVBUF); return NULL; } head = ithd->it_ih; /* look at chain of handlers */ if (head) { while (head->ih_next != NULL) head = head->ih_next; /* find the end */ head->ih_next = idesc; /* hook it in there */ } else ithd->it_ih = idesc; /* put it up front */ update_intrname(irq, idesc->ih_name); return (idesc); } /* * Deactivate and remove linked list the interrupt handler descriptor * data connected created by an earlier call of inthand_add(), then * adjust the interrupt masks if necessary. * * Return the memory held by the interrupt handler descriptor data * structure to the system. First ensure the handler is not actively * in use. */ int inthand_remove(struct intrhand *idesc) { struct ithd *ithd; /* descriptor for the IRQ */ struct intrhand *ih; /* chain of handlers */ if (idesc == NULL) return (-1); ithd = idesc->ih_ithd; ih = ithd->it_ih; if (ih == idesc) /* first in the chain */ ithd->it_ih = idesc->ih_next; /* unhook it */ else { while ((ih != NULL) && (ih->ih_next != idesc) ) ih = ih->ih_next; if (ih->ih_next != idesc) return (-1); ih->ih_next = ih->ih_next->ih_next; } if (ithd->it_ih == NULL) { /* no handlers left, */ icu_unset(ithd->irq, idesc->ih_handler); ithds[ithd->irq] = NULL; if ((idesc->ih_flags & INTR_FAST) == 0) { mtx_enter(&sched_lock, MTX_SPIN); if (ithd->it_proc->p_stat == SWAIT) { ithd->it_proc->p_stat = SRUN; setrunqueue(ithd->it_proc); /* * We don't do an ast here because we really * don't care when it runs next. * * XXX: should we lower the threads priority? */ } mtx_exit(&sched_lock, MTX_SPIN); } } free(idesc, M_DEVBUF); return (0); }