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author | dfr <dfr@FreeBSD.org> | 1997-06-02 08:19:06 +0000 |
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committer | dfr <dfr@FreeBSD.org> | 1997-06-02 08:19:06 +0000 |
commit | 6ba14cc686e7f472a6937088de33f356556bf759 (patch) | |
tree | c7c4bcee2063b32a59ec0918ff2f82386e367571 /sys/i386/isa/nmi.c | |
parent | 33ddef35e6191fb2cd19ec096f2d855851331a45 (diff) | |
download | FreeBSD-src-6ba14cc686e7f472a6937088de33f356556bf759.zip FreeBSD-src-6ba14cc686e7f472a6937088de33f356556bf759.tar.gz |
Move interrupt handling code from isa.c to a new file. This should make
isa.c (slightly) more portable and will make my life developing the really
portable version much easier.
Reviewed by: peter, fsmp
Diffstat (limited to 'sys/i386/isa/nmi.c')
-rw-r--r-- | sys/i386/isa/nmi.c | 418 |
1 files changed, 418 insertions, 0 deletions
diff --git a/sys/i386/isa/nmi.c b/sys/i386/isa/nmi.c new file mode 100644 index 0000000..40acb8e --- /dev/null +++ b/sys/i386/isa/nmi.c @@ -0,0 +1,418 @@ +/*- + * 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 + * $Id: isa.c,v 1.85 1997/05/26 14:42:24 se Exp $ + */ + +#include "opt_auto_eoi.h" + +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/buf.h> +#include <sys/syslog.h> +#include <sys/malloc.h> +#include <machine/ipl.h> +#include <machine/md_var.h> +#include <machine/segments.h> +#if defined(APIC_IO) +#include <machine/smp.h> +#include <machine/apic.h> +#endif /* APIC_IO */ +#include <vm/vm.h> +#include <vm/vm_param.h> +#include <vm/pmap.h> +#include <i386/isa/isa_device.h> +#include <i386/isa/isa.h> +#include <i386/isa/icu.h> +#include <i386/isa/ic/i8237.h> +#include "vector.h" + +#include <i386/isa/intr_machdep.h> +#include <sys/interrupt.h> + +#ifdef APIC_IO +/* + * This is to accommodate "mixed-mode" programming for + * motherboards that don't connect the 8254 to the IO APIC. + */ +#define AUTO_EOI_1 +#endif + +u_long *intr_countp[ICU_LEN]; +inthand2_t *intr_handler[ICU_LEN]; +u_int intr_mask[ICU_LEN]; +u_int* intr_mptr[ICU_LEN]; +int 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 inthand2_t isa_strayintr; + +#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) + +/* + * Handle a NMI, possibly a machine check. + * return true to panic system, false to ignore. + */ +int +isa_nmi(cd) + int cd; +{ + int isa_port = inb(0x61); + int eisa_port = inb(0x461); + if(isa_port & NMI_PARITY) { + panic("RAM parity error, likely hardware failure."); + } else if(isa_port & NMI_IOCHAN) { + panic("I/O channel check, likely hardware failure."); + } else if(eisa_port & ENMI_WATCHDOG) { + panic("EISA watchdog timer expired, likely hardware failure."); + } else if(eisa_port & ENMI_BUSTIMER) { + panic("EISA bus timeout, likely hardware failure."); + } else if(eisa_port & ENMI_IOSTATUS) { + panic("EISA I/O port status error."); + } else { + printf("\nNMI ISA %x, EISA %x\n", isa_port, eisa_port); + return(0); + } +} + +/* + * Fill in default interrupt table (in case of spuruious interrupt + * during configuration of kernel, setup interrupt control unit + */ +void +isa_defaultirq() +{ + int i; + + /* icu vectors */ + for (i = 0; i < ICU_LEN; i++) + icu_unset(i, (inthand2_t *)NULL); + + /* initialize 8259's */ + outb(IO_ICU1, 0x11); /* reset; program device, four bytes */ + outb(IO_ICU1+1, NRSVIDT); /* starting at this vector index */ + outb(IO_ICU1+1, 1<<2); /* slave on line 2 */ +#ifdef AUTO_EOI_1 + outb(IO_ICU1+1, 2 | 1); /* auto EOI, 8086 mode */ +#else + outb(IO_ICU1+1, 1); /* 8086 mode */ +#endif + outb(IO_ICU1+1, 0xff); /* leave interrupts masked */ + outb(IO_ICU1, 0x0a); /* default to IRR on read */ + outb(IO_ICU1, 0xc0 | (3 - 1)); /* pri order 3-7, 0-2 (com2 first) */ + + outb(IO_ICU2, 0x11); /* reset; program device, four bytes */ + outb(IO_ICU2+1, NRSVIDT+8); /* staring at this vector index */ + outb(IO_ICU2+1,2); /* my slave id is 2 */ +#ifdef AUTO_EOI_2 + outb(IO_ICU2+1, 2 | 1); /* auto EOI, 8086 mode */ +#else + outb(IO_ICU2+1,1); /* 8086 mode */ +#endif + outb(IO_ICU2+1, 0xff); /* leave interrupts masked */ + outb(IO_ICU2, 0x0a); /* default to IRR on read */ +} + +/* + * Caught a stray interrupt, notify + */ +static void +isa_strayintr(d) + int d; +{ + + /* DON'T BOTHER FOR NOW! */ + /* for some reason, we get bursts of intr #7, even if not enabled! */ + /* + * Well the reason you got bursts of intr #7 is because someone + * raised an interrupt line and dropped it before the 8259 could + * prioritize it. This is documented in the intel data book. This + * means you have BAD hardware! I have changed this so that only + * the first 5 get logged, then it quits logging them, and puts + * out a special message. rgrimes 3/25/1993 + */ + /* + * 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[NR_DEVICES + d] <= 5) + log(LOG_ERR, "stray irq %d\n", d); + if (intrcnt[NR_DEVICES + d] == 5) + log(LOG_CRIT, + "too many stray irq %d's; not logging any more\n", d); +} + +/* + * Return nonzero if a (masked) irq is pending for a given device. + */ +#if defined(APIC_IO) + +int +isa_irq_pending(dvp) + struct isa_device *dvp; +{ + /* read APIC IRR containing the 16 ISA INTerrupts */ + return ((lapic__irr1 & 0x00ffffff) + & (u_int32_t)dvp->id_irq) ? 1 : 0; +} + +/* + * an 8259 specific routine, + * for use by boot probes in certain device drivers. + */ +int +icu_irq_pending(dvp) + struct isa_device *dvp; +{ + unsigned id_irq; + id_irq = dvp->id_irq; + if (id_irq & 0xff) + return (inb(IO_ICU1) & id_irq); + return (inb(IO_ICU2) & (id_irq >> 8)); +} + +#else /* APIC_IO */ + +int +isa_irq_pending(dvp) + struct isa_device *dvp; +{ + unsigned id_irq; + id_irq = dvp->id_irq; + if (id_irq & 0xff) + return (inb(IO_ICU1) & id_irq); + return (inb(IO_ICU2) & (id_irq >> 8)); +} + +#endif /* APIC_IO */ + +int +update_intr_masks(void) +{ + int intr, n=0; + u_int mask,*maskptr; + + for (intr=0; intr < ICU_LEN; intr ++) { +#if defined(APIC_IO) + /* no 8259 SLAVE to ignore */ +#else + if (intr==2) continue; /* ignore 8259 SLAVE output */ +#endif /* APIC_IO */ + maskptr = intr_mptr[intr]; + if (!maskptr) continue; + *maskptr |= 1 << intr; + mask = *maskptr; + if (mask != intr_mask[intr]) { +#if 0 + printf ("intr_mask[%2d] old=%08x new=%08x ptr=%p.\n", + intr, intr_mask[intr], mask, maskptr); +#endif + intr_mask[intr]=mask; + n++; + } + + } + return (n); +} + +/* + * The find_device_id function is only required because of the way the + * device names are currently stored for reporting in systat or vmstat. + * In fact, those programs should be modified to use the sysctl interface + * to obtain a list of driver names by traversing intreclist_head[irq]. + */ +static int +find_device_id(int irq) +{ + char buf[16]; + char *cp; + int free_id, id; + + sprintf(buf, "pci irq%d", irq); + cp = intrnames; + /* default to 0, which corresponds to clk0 */ + free_id = 0; + + for (id = 0; id < NR_DEVICES; id++) { + if (strcmp(cp, buf) == 0) + return (id); + if (free_id == 0 && strcmp(cp, "pci irqnn") == 0) + free_id = id; + while (*cp++ != '\0'); + } +#if 0 + if (free_id == 0) { + /* + * All pci irq counters are in use, perhaps because config + * is old so there aren't any. Abuse the clk0 counter. + */ + printf("\tcounting shared irq%d as clk0 irq\n", irq); + } +#endif + return (free_id); +} + +void +update_intrname(int intr, int device_id) +{ + char *cp; + int id; + + if (device_id == -1) + device_id = find_device_id(intr); + + if ((u_int)device_id >= NR_DEVICES) + return; + + intr_countp[intr] = &intrcnt[device_id]; + + for (cp = intrnames, id = 0; id <= device_id; id++) + while (*cp++ != '\0') + ; + if (cp > eintrnames) + return; + if (intr < 10) { + cp[-3] = intr + '0'; + cp[-2] = ' '; + } else if (intr < 20) { + cp[-3] = '1'; + cp[-2] = intr - 10 + '0'; + } else { + cp[-3] = '2'; + cp[-2] = intr - 20 + '0'; + } +} + + +int +icu_setup(int intr, inthand2_t *handler, void *arg, u_int *maskptr, int flags) +{ + u_long ef; + u_int mask = (maskptr ? *maskptr : 0); + +#if defined(APIC_IO) + if ((u_int)intr >= ICU_LEN) /* no 8259 SLAVE to ignore */ +#else + if ((u_int)intr >= ICU_LEN || intr == 2) +#endif /* APIC_IO */ + if (intr_handler[intr] != isa_strayintr) + return (EBUSY); + + ef = read_eflags(); + disable_intr(); + intr_handler[intr] = handler; + intr_mptr[intr] = maskptr; + intr_mask[intr] = mask | (1 << intr); + intr_unit[intr] = (int) arg; + setidt(ICU_OFFSET + intr, + flags & INTR_FAST ? fastintr[intr] : slowintr[intr], + SDT_SYS386IGT, SEL_KPL, GSEL(GCODE_SEL, SEL_KPL)); + INTREN(1 << intr); + write_eflags(ef); + return (0); +} + +void +register_imask(dvp, mask) + struct isa_device *dvp; + u_int mask; +{ + if (dvp->id_alive && dvp->id_irq) { + int intr; + + intr = ffs(dvp->id_irq) - 1; + intr_mask[intr] = mask | (1 <<intr); + } + (void) update_intr_masks(); +} + +int +icu_unset(intr, handler) + int intr; + inthand2_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[NR_DEVICES + intr]; + intr_handler[intr] = isa_strayintr; + intr_mptr[intr] = NULL; + intr_mask[intr] = HWI_MASK | SWI_MASK; + intr_unit[intr] = intr; + setidt(ICU_OFFSET + intr, slowintr[intr], SDT_SYS386IGT, SEL_KPL, + GSEL(GCODE_SEL, SEL_KPL)); + write_eflags(ef); + return (0); +} |