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461 lines
12 KiB
C
461 lines
12 KiB
C
/*-
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* Copyright (c) 1991 The Regents of the University of California.
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* All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* William Jolitz.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* from: @(#)isa.c 7.2 (Berkeley) 5/13/91
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* $Id: intr_machdep.c,v 1.3 1997/06/22 16:04:04 peter Exp $
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*/
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#include "opt_auto_eoi.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/syslog.h>
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#include <machine/ipl.h>
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#include <machine/md_var.h>
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#include <machine/segments.h>
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#if defined(APIC_IO)
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#include <machine/smp.h>
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#endif /* APIC_IO */
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#include <i386/isa/isa_device.h>
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#ifdef PC98
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#include <pc98/pc98/pc98.h>
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#include <pc98/pc98/pc98_machdep.h>
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#include <pc98/pc98/epsonio.h>
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#else
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#include <i386/isa/isa.h>
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#endif
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#include <i386/isa/icu.h>
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#include "vector.h"
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#include <i386/isa/intr_machdep.h>
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#include <sys/interrupt.h>
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/* XXX should be in suitable include files */
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#ifdef PC98
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#define ICU_IMR_OFFSET 2 /* IO_ICU{1,2} + 2 */
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#define ICU_SLAVEID 7
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#else
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#define ICU_IMR_OFFSET 1 /* IO_ICU{1,2} + 1 */
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#define ICU_SLAVEID 2
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#endif
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#ifdef APIC_IO
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/*
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* This is to accommodate "mixed-mode" programming for
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* motherboards that don't connect the 8254 to the IO APIC.
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*/
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#define AUTO_EOI_1
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#endif
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u_long *intr_countp[ICU_LEN];
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inthand2_t *intr_handler[ICU_LEN];
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u_int intr_mask[ICU_LEN];
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u_int* intr_mptr[ICU_LEN];
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int intr_unit[ICU_LEN];
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static inthand_t *fastintr[ICU_LEN] = {
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&IDTVEC(fastintr0), &IDTVEC(fastintr1),
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&IDTVEC(fastintr2), &IDTVEC(fastintr3),
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&IDTVEC(fastintr4), &IDTVEC(fastintr5),
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&IDTVEC(fastintr6), &IDTVEC(fastintr7),
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&IDTVEC(fastintr8), &IDTVEC(fastintr9),
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&IDTVEC(fastintr10), &IDTVEC(fastintr11),
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&IDTVEC(fastintr12), &IDTVEC(fastintr13),
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&IDTVEC(fastintr14), &IDTVEC(fastintr15)
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#if defined(APIC_IO)
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, &IDTVEC(fastintr16), &IDTVEC(fastintr17),
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&IDTVEC(fastintr18), &IDTVEC(fastintr19),
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&IDTVEC(fastintr20), &IDTVEC(fastintr21),
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&IDTVEC(fastintr22), &IDTVEC(fastintr23)
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#endif /* APIC_IO */
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};
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static inthand_t *slowintr[ICU_LEN] = {
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&IDTVEC(intr0), &IDTVEC(intr1), &IDTVEC(intr2), &IDTVEC(intr3),
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&IDTVEC(intr4), &IDTVEC(intr5), &IDTVEC(intr6), &IDTVEC(intr7),
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&IDTVEC(intr8), &IDTVEC(intr9), &IDTVEC(intr10), &IDTVEC(intr11),
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&IDTVEC(intr12), &IDTVEC(intr13), &IDTVEC(intr14), &IDTVEC(intr15)
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#if defined(APIC_IO)
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, &IDTVEC(intr16), &IDTVEC(intr17), &IDTVEC(intr18), &IDTVEC(intr19),
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&IDTVEC(intr20), &IDTVEC(intr21), &IDTVEC(intr22), &IDTVEC(intr23)
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#endif /* APIC_IO */
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};
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static inthand2_t isa_strayintr;
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#ifdef PC98
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#define NMI_PARITY 0x04
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#define NMI_EPARITY 0x02
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#else
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#define NMI_PARITY (1 << 7)
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#define NMI_IOCHAN (1 << 6)
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#define ENMI_WATCHDOG (1 << 7)
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#define ENMI_BUSTIMER (1 << 6)
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#define ENMI_IOSTATUS (1 << 5)
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#endif
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/*
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* Handle a NMI, possibly a machine check.
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* return true to panic system, false to ignore.
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*/
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int
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isa_nmi(cd)
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int cd;
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{
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#ifdef PC98
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int port = inb(0x33);
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if (epson_machine_id == 0x20)
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epson_outb(0xc16, epson_inb(0xc16) | 0x1);
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if (port & NMI_PARITY) {
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panic("BASE RAM parity error, likely hardware failure.");
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} else if (port & NMI_EPARITY) {
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panic("EXTENDED RAM parity error, likely hardware failure.");
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} else {
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printf("\nNMI Resume ??\n");
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return(0);
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}
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#else /* IBM-PC */
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int isa_port = inb(0x61);
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int eisa_port = inb(0x461);
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if(isa_port & NMI_PARITY) {
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panic("RAM parity error, likely hardware failure.");
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} else if(isa_port & NMI_IOCHAN) {
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panic("I/O channel check, likely hardware failure.");
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} else if(eisa_port & ENMI_WATCHDOG) {
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panic("EISA watchdog timer expired, likely hardware failure.");
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} else if(eisa_port & ENMI_BUSTIMER) {
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panic("EISA bus timeout, likely hardware failure.");
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} else if(eisa_port & ENMI_IOSTATUS) {
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panic("EISA I/O port status error.");
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} else {
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printf("\nNMI ISA %x, EISA %x\n", isa_port, eisa_port);
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return(0);
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}
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#endif
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}
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/*
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* Fill in default interrupt table (in case of spuruious interrupt
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* during configuration of kernel, setup interrupt control unit
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*/
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void
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isa_defaultirq()
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{
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int i;
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/* icu vectors */
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for (i = 0; i < ICU_LEN; i++)
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icu_unset(i, (inthand2_t *)NULL);
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/* initialize 8259's */
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outb(IO_ICU1, 0x11); /* reset; program device, four bytes */
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outb(IO_ICU1+ICU_IMR_OFFSET, NRSVIDT); /* starting at this vector index */
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outb(IO_ICU1+ICU_IMR_OFFSET, IRQ_SLAVE); /* slave on line 7 */
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#ifdef PC98
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#ifdef AUTO_EOI_1
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outb(IO_ICU1+ICU_IMR_OFFSET, 0x1f); /* (master) auto EOI, 8086 mode */
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#else
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outb(IO_ICU1+ICU_IMR_OFFSET, 0x1d); /* (master) 8086 mode */
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#endif
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#else /* IBM-PC */
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#ifdef AUTO_EOI_1
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outb(IO_ICU1+ICU_IMR_OFFSET, 2 | 1); /* auto EOI, 8086 mode */
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#else
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outb(IO_ICU1+ICU_IMR_OFFSET, 1); /* 8086 mode */
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#endif
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#endif /* PC98 */
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outb(IO_ICU1+ICU_IMR_OFFSET, 0xff); /* leave interrupts masked */
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outb(IO_ICU1, 0x0a); /* default to IRR on read */
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#ifndef PC98
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outb(IO_ICU1, 0xc0 | (3 - 1)); /* pri order 3-7, 0-2 (com2 first) */
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#endif /* !PC98 */
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outb(IO_ICU2, 0x11); /* reset; program device, four bytes */
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outb(IO_ICU2+ICU_IMR_OFFSET, NRSVIDT+8); /* staring at this vector index */
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outb(IO_ICU2+ICU_IMR_OFFSET, ICU_SLAVEID); /* my slave id is 7 */
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#ifdef PC98
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outb(IO_ICU2+ICU_IMR_OFFSET,9); /* 8086 mode */
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#else /* IBM-PC */
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#ifdef AUTO_EOI_2
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outb(IO_ICU2+ICU_IMR_OFFSET, 2 | 1); /* auto EOI, 8086 mode */
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#else
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outb(IO_ICU2+ICU_IMR_OFFSET,1); /* 8086 mode */
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#endif
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#endif /* PC98 */
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outb(IO_ICU2+ICU_IMR_OFFSET, 0xff); /* leave interrupts masked */
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outb(IO_ICU2, 0x0a); /* default to IRR on read */
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}
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/*
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* Caught a stray interrupt, notify
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*/
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static void
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isa_strayintr(d)
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int d;
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{
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/* DON'T BOTHER FOR NOW! */
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/* for some reason, we get bursts of intr #7, even if not enabled! */
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/*
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* Well the reason you got bursts of intr #7 is because someone
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* raised an interrupt line and dropped it before the 8259 could
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* prioritize it. This is documented in the intel data book. This
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* means you have BAD hardware! I have changed this so that only
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* the first 5 get logged, then it quits logging them, and puts
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* out a special message. rgrimes 3/25/1993
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*/
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/*
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* XXX TODO print a different message for #7 if it is for a
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* glitch. Glitches can be distinguished from real #7's by
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* testing that the in-service bit is _not_ set. The test
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* must be done before sending an EOI so it can't be done if
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* we are using AUTO_EOI_1.
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*/
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if (intrcnt[NR_DEVICES + d] <= 5)
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log(LOG_ERR, "stray irq %d\n", d);
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if (intrcnt[NR_DEVICES + d] == 5)
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log(LOG_CRIT,
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"too many stray irq %d's; not logging any more\n", d);
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}
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/*
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* Return nonzero if a (masked) irq is pending for a given device.
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*/
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#if defined(APIC_IO)
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int
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isa_irq_pending(dvp)
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struct isa_device *dvp;
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{
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/* read APIC IRR containing the 16 ISA INTerrupts */
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return ((lapic.irr1 & 0x00ffffff)
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& (u_int32_t)dvp->id_irq) ? 1 : 0;
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}
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/*
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* an 8259 specific routine,
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* for use by boot probes in certain device drivers.
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*/
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int
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icu_irq_pending(dvp)
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struct isa_device *dvp;
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{
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unsigned id_irq;
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id_irq = dvp->id_irq;
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if (id_irq & 0xff)
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return (inb(IO_ICU1) & id_irq);
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return (inb(IO_ICU2) & (id_irq >> 8));
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}
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#else /* APIC_IO */
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int
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isa_irq_pending(dvp)
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struct isa_device *dvp;
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{
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unsigned id_irq;
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id_irq = dvp->id_irq;
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if (id_irq & 0xff)
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return (inb(IO_ICU1) & id_irq);
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return (inb(IO_ICU2) & (id_irq >> 8));
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}
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#endif /* APIC_IO */
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int
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update_intr_masks(void)
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{
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int intr, n=0;
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u_int mask,*maskptr;
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for (intr=0; intr < ICU_LEN; intr ++) {
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#if defined(APIC_IO)
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/* no 8259 SLAVE to ignore */
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#else
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if (intr==ICU_SLAVEID) continue; /* ignore 8259 SLAVE output */
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#endif /* APIC_IO */
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maskptr = intr_mptr[intr];
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if (!maskptr) continue;
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*maskptr |= 1 << intr;
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mask = *maskptr;
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if (mask != intr_mask[intr]) {
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#if 0
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printf ("intr_mask[%2d] old=%08x new=%08x ptr=%p.\n",
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intr, intr_mask[intr], mask, maskptr);
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#endif
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intr_mask[intr]=mask;
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n++;
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}
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}
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return (n);
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}
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/*
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* The find_device_id function is only required because of the way the
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* device names are currently stored for reporting in systat or vmstat.
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* In fact, those programs should be modified to use the sysctl interface
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* to obtain a list of driver names by traversing intreclist_head[irq].
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*/
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static int
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find_device_id(int irq)
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{
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char buf[16];
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char *cp;
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int free_id, id;
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sprintf(buf, "pci irq%d", irq);
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cp = intrnames;
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/* default to 0, which corresponds to clk0 */
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free_id = 0;
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for (id = 0; id < NR_DEVICES; id++) {
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if (strcmp(cp, buf) == 0)
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return (id);
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if (free_id == 0 && strcmp(cp, "pci irqnn") == 0)
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free_id = id;
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while (*cp++ != '\0');
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}
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#if 0
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if (free_id == 0) {
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/*
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* All pci irq counters are in use, perhaps because config
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* is old so there aren't any. Abuse the clk0 counter.
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*/
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printf("\tcounting shared irq%d as clk0 irq\n", irq);
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}
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#endif
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return (free_id);
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}
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void
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update_intrname(int intr, int device_id)
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{
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char *cp;
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int id;
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if (device_id == -1)
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device_id = find_device_id(intr);
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if ((u_int)device_id >= NR_DEVICES)
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return;
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intr_countp[intr] = &intrcnt[device_id];
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for (cp = intrnames, id = 0; id <= device_id; id++)
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while (*cp++ != '\0')
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;
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if (cp > eintrnames)
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return;
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if (intr < 10) {
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cp[-3] = intr + '0';
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cp[-2] = ' ';
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} else if (intr < 20) {
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cp[-3] = '1';
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cp[-2] = intr - 10 + '0';
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} else {
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cp[-3] = '2';
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cp[-2] = intr - 20 + '0';
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}
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}
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int
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icu_setup(int intr, inthand2_t *handler, void *arg, u_int *maskptr, int flags)
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{
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u_long ef;
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u_int mask = (maskptr ? *maskptr : 0);
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#if defined(APIC_IO)
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if ((u_int)intr >= ICU_LEN) /* no 8259 SLAVE to ignore */
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#else
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if ((u_int)intr >= ICU_LEN || intr == ICU_SLAVEID)
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#endif /* APIC_IO */
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if (intr_handler[intr] != isa_strayintr)
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return (EBUSY);
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ef = read_eflags();
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disable_intr();
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intr_handler[intr] = handler;
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intr_mptr[intr] = maskptr;
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intr_mask[intr] = mask | (1 << intr);
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intr_unit[intr] = (int) arg;
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setidt(ICU_OFFSET + intr,
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flags & INTR_FAST ? fastintr[intr] : slowintr[intr],
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SDT_SYS386IGT, SEL_KPL, GSEL(GCODE_SEL, SEL_KPL));
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INTREN(1 << intr);
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write_eflags(ef);
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return (0);
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}
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void
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register_imask(dvp, mask)
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struct isa_device *dvp;
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u_int mask;
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{
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if (dvp->id_alive && dvp->id_irq) {
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int intr;
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intr = ffs(dvp->id_irq) - 1;
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intr_mask[intr] = mask | (1 <<intr);
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}
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(void) update_intr_masks();
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}
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int
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icu_unset(intr, handler)
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int intr;
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inthand2_t *handler;
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{
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u_long ef;
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if ((u_int)intr >= ICU_LEN || handler != intr_handler[intr])
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return (EINVAL);
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INTRDIS(1 << intr);
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ef = read_eflags();
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disable_intr();
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intr_countp[intr] = &intrcnt[NR_DEVICES + intr];
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intr_handler[intr] = isa_strayintr;
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intr_mptr[intr] = NULL;
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intr_mask[intr] = HWI_MASK | SWI_MASK;
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intr_unit[intr] = intr;
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setidt(ICU_OFFSET + intr, slowintr[intr], SDT_SYS386IGT, SEL_KPL,
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GSEL(GCODE_SEL, SEL_KPL));
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write_eflags(ef);
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return (0);
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}
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