diff options
Diffstat (limited to 'sys/amd64/isa/intr_machdep.c')
| -rw-r--r-- | sys/amd64/isa/intr_machdep.c | 525 |
1 files changed, 0 insertions, 525 deletions
diff --git a/sys/amd64/isa/intr_machdep.c b/sys/amd64/isa/intr_machdep.c deleted file mode 100644 index 30c12e7..0000000 --- a/sys/amd64/isa/intr_machdep.c +++ /dev/null @@ -1,525 +0,0 @@ -/*- - * 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. - * - * @(#)isa.c 7.2 (Berkeley) 5/13/91 - */ - -#include <sys/cdefs.h> -__FBSDID("$FreeBSD$"); - -#include "opt_isa.h" - -#include <sys/param.h> -#include <sys/bus.h> -#include <sys/errno.h> -#include <sys/interrupt.h> -#include <sys/kernel.h> -#include <sys/kthread.h> -#include <sys/lock.h> -#include <sys/malloc.h> -#include <sys/module.h> -#include <sys/mutex.h> -#include <sys/proc.h> -#include <sys/syslog.h> -#include <sys/systm.h> -#include <sys/unistd.h> - -#include <machine/md_var.h> -#include <machine/segments.h> - -#include <amd64/isa/isa.h> -#include <amd64/isa/icu.h> - -#ifdef DEV_ISA -#include <isa/isavar.h> -#endif -#include <amd64/isa/intr_machdep.h> -#include <sys/interrupt.h> - -/* - * 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 struct mtx ithds_table_lock; /* protect the ithds table */ - -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), -}; - -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), -}; - -static driver_intr_t isa_strayintr; - -static void ithds_init(void *dummy); -static void ithread_enable(uintptr_t vector); -static void ithread_disable(uintptr_t vector); -static void init_i8259(void); - -#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) - -#ifdef DEV_ISA -/* - * 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); -} - -/* - * 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) -{ - 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); -DRIVER_MODULE(atpic, acpi, atpic_driver, atpic_devclass, 0, 0); -#endif /* DEV_ISA */ - -/* - * Handle a NMI, possibly a machine check. - * return true to panic system, false to ignore. - */ -int -isa_nmi(cd) - int cd; -{ - int retval = 0; - int isa_port = inb(0x61); - - log(LOG_CRIT, "NMI ISA STATUS 0x%02x", isa_port); - - 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; - } - - return (retval); -} - -/* - * ICU reinitialize when ICU configuration has lost. - */ -void icu_reinit() -{ - int i; - register_t crit; - - crit = intr_disable(); - mtx_lock_spin(&icu_lock); - init_i8259(); - for(i=0;i<ICU_LEN;i++) - if(intr_handler[i] != isa_strayintr) - INTREN(1<<i); - mtx_unlock_spin(&icu_lock); - intr_restore(crit); -} - -/* - * 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; - register_t crit; - - /* icu vectors */ - for (i = 0; i < ICU_LEN; i++) - icu_unset(i, (driver_intr_t *)NULL); - crit = intr_disable(); - mtx_lock_spin(&icu_lock); - init_i8259(); - mtx_unlock_spin(&icu_lock); - intr_restore(crit); -} - - -/* - *initialize 8259's - */ -static void init_i8259() -{ - - outb(IO_ICU1, ICW1_RESET | ICW1_IC4); /* 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 2 */ - outb(IO_ICU1+ICU_IMR_OFFSET, ICW4_8086);/* 8086 mode */ - outb(IO_ICU1+ICU_IMR_OFFSET, 0xff); /* leave interrupts masked */ - outb(IO_ICU1, OCW3_SEL | OCW3_RR); /* default to IRR on read */ - outb(IO_ICU1, ICU_SETPRI | 0x2);/* pri order 3-7, 0-2 (com2 first) */ - - outb(IO_ICU2, ICW1_RESET | ICW1_IC4); /* 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 2 */ - outb(IO_ICU2+ICU_IMR_OFFSET, ICW4_8086); /* 8086 mode */ - outb(IO_ICU2+ICU_IMR_OFFSET, 0xff); /* leave interrupts masked */ - outb(IO_ICU2, OCW3_SEL | OCW3_RR); /* default to IRR on read */ -} - -/* - * Caught a stray interrupt, notify - */ -static int isaglitch7; -static int isaglitch15; - -static void -isa_strayintr(vcookiep) - void *vcookiep; -{ - int intr = (void **)vcookiep - &intr_unit[0]; - int isr; - - /* Determine if it is a stray interrupt or simply a glitch */ - if (intr == 7) { - outb(IO_ICU1, OCW3_SEL); /* select IS register */ - isr = inb(IO_ICU1); - outb(IO_ICU1, OCW3_SEL | OCW3_RR | OCW3_RIS); /* reselect IIR */ - if ((isr & 0x80) == 0) { - isaglitch7++; - return; - } - } - if (intr == 15) { - outb(IO_ICU2, OCW3_SEL); /* select IS register */ - isr = inb(IO_ICU2); - outb(IO_ICU2, OCW3_SEL | OCW3_RR); /* reselect IIR */ - if ((isr & 0x80) == 0) { - isaglitch15++; - return; - } - } - 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); -} - -#ifdef DEV_ISA -/* - * 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, const 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) -{ - register_t crit; - - if ((u_int)intr >= ICU_LEN || intr == ICU_SLAVEID) - return (EINVAL); -#if 0 - if (intr_handler[intr] != isa_strayintr) - return (EBUSY); -#endif - - crit = intr_disable(); - mtx_lock_spin(&icu_lock); - intr_handler[intr] = handler; - intr_unit[intr] = arg; - setidt(ICU_OFFSET + intr, - flags & INTR_FAST ? fastintr[intr] : slowintr[intr], - SDT_SYSIGT, SEL_KPL, 0); - INTREN(1 << intr); - mtx_unlock_spin(&icu_lock); - intr_restore(crit); - 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; -{ - register_t crit; - - if ((u_int)intr >= ICU_LEN || handler != intr_handler[intr]) - return (EINVAL); - - crit = intr_disable(); - mtx_lock_spin(&icu_lock); - INTRDIS(1 << intr); - intr_countp[intr] = &intrcnt[1 + intr]; - intr_handler[intr] = isa_strayintr; - intr_unit[intr] = &intr_unit[intr]; - setidt(ICU_OFFSET + intr, slowintr[intr], SDT_SYSIGT, SEL_KPL, 0); - mtx_unlock_spin(&icu_lock); - intr_restore(crit); - return (0); -} - -static void -ithds_init(void *dummy) -{ - - mtx_init(&ithds_table_lock, "ithread table lock", NULL, MTX_SPIN); -} -SYSINIT(ithds_init, SI_SUB_INTR, SI_ORDER_SECOND, ithds_init, NULL); - -static void -ithread_enable(uintptr_t vector) -{ - register_t crit; - - crit = intr_disable(); - mtx_lock_spin(&icu_lock); - INTREN(1 << vector); - mtx_unlock_spin(&icu_lock); - intr_restore(crit); -} - -static void -ithread_disable(uintptr_t vector) -{ - register_t crit; - - crit = intr_disable(); - mtx_lock_spin(&icu_lock); - INTRDIS(1 << vector); - mtx_unlock_spin(&icu_lock); - intr_restore(crit); -} - -int -inthand_add(const char *name, int irq, driver_intr_t handler, void *arg, - enum intr_type flags, void **cookiep) -{ - struct ithd *ithd; /* descriptor for the IRQ */ - int errcode = 0; - int created_ithd = 0; - - /* - * Work around a race where more than one CPU may be registering - * handlers on the same IRQ at the same time. - */ - mtx_lock_spin(&ithds_table_lock); - ithd = ithds[irq]; - mtx_unlock_spin(&ithds_table_lock); - if (ithd == NULL) { - errcode = ithread_create(&ithd, irq, 0, ithread_disable, - ithread_enable, "irq%d:", irq); - if (errcode) - return (errcode); - mtx_lock_spin(&ithds_table_lock); - if (ithds[irq] == NULL) { - ithds[irq] = ithd; - created_ithd++; - mtx_unlock_spin(&ithds_table_lock); - } else { - struct ithd *orphan; - - orphan = ithd; - ithd = ithds[irq]; - mtx_unlock_spin(&ithds_table_lock); - ithread_destroy(orphan); - } - } - - errcode = ithread_add_handler(ithd, name, handler, arg, - ithread_priority(flags), flags, cookiep); - - if ((flags & INTR_FAST) == 0 || errcode) - /* - * 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"); - - if (errcode) - return (errcode); - - if (flags & INTR_FAST) { - errcode = icu_setup(irq, handler, arg, flags); - if (errcode && bootverbose) - printf("\tinthand_add(irq%d) failed, result=%d\n", - irq, errcode); - if (errcode) - return (errcode); - } - - update_intrname(irq, name); - return (0); -} - -/* - * 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(void *cookie) -{ - - return (ithread_remove_handler(cookie)); -} |
