6182fdbda8
i386 platform boots, it is no longer ISA-centric, and is fully dynamic. Most old drivers compile and run without modification via 'compatability shims' to enable a smoother transition. eisa, isapnp and pccard* are not yet using the new resource manager. Once fully converted, all drivers will be loadable, including PCI and ISA. (Some other changes appear to have snuck in, including a port of Soren's ATA driver to the Alpha. Soren, back this out if you need to.) This is a checkpoint of work-in-progress, but is quite functional. The bulk of the work was done over the last few years by Doug Rabson and Garrett Wollman. Approved by: core
519 lines
14 KiB
C
519 lines
14 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 1.17 1999/04/14 14:26:36 bde 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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#ifndef SMP
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#include <machine/lock.h>
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#endif
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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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#include <machine/smptests.h> /** FAST_HI */
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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 <i386/isa/intr_machdep.h>
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#include <sys/interrupt.h>
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#ifdef APIC_IO
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#include <machine/clock.h>
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#endif
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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 1
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#endif
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#define NR_INTRNAMES (1 + ICU_LEN + 2 * ICU_LEN)
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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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static u_int* intr_mptr[ICU_LEN];
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void *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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if (isa_port & NMI_IOCHAN)
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panic("I/O channel check, likely hardware failure.");
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/*
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* On a real EISA machine, this will never happen. However it can
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* happen on ISA machines which implement XT style floating point
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* error handling (very rare). Save them from a meaningless panic.
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*/
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if (eisa_port == 0xff)
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return(0);
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if (eisa_port & ENMI_WATCHDOG)
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panic("EISA watchdog timer expired, likely hardware failure.");
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if (eisa_port & ENMI_BUSTIMER)
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panic("EISA bus timeout, likely hardware failure.");
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if (eisa_port & ENMI_IOSTATUS)
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panic("EISA I/O port status error.");
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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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#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(vcookiep)
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void *vcookiep;
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{
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int intr = (void **)vcookiep - &intr_unit[0];
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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[1 + intr] <= 5)
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log(LOG_ERR, "stray irq %d\n", intr);
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if (intrcnt[1 + intr] == 5)
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log(LOG_CRIT,
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"too many stray irq %d's; not logging any more\n", intr);
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}
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/*
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* Return a bitmap of the current interrupt requests. This is 8259-specific
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* and is only suitable for use at probe time.
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*/
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intrmask_t
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isa_irq_pending()
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{
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u_char irr1;
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u_char irr2;
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irr1 = inb(IO_ICU1);
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irr2 = inb(IO_ICU2);
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return ((irr2 << 8) | irr1);
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}
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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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static const char *
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isa_get_nameunit(int id)
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{
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static char buf[32];
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struct isa_device *dp;
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if (id == -1)
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return ("pci"); /* XXX may also be eisa */
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if (id == 0)
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return ("clk0"); /* XXX may also be sloppy driver */
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if (id == 1)
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return ("rtc0");
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#if 0
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for (dp = isa_devtab_bio; dp->id_driver != NULL; dp++)
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if (dp->id_id == id)
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goto found_device;
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for (dp = isa_devtab_cam; dp->id_driver != NULL; dp++)
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if (dp->id_id == id)
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goto found_device;
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for (dp = isa_devtab_net; dp->id_driver != NULL; dp++)
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if (dp->id_id == id)
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goto found_device;
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for (dp = isa_devtab_null; dp->id_driver != NULL; dp++)
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if (dp->id_id == id)
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goto found_device;
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for (dp = isa_devtab_tty; dp->id_driver != NULL; dp++)
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if (dp->id_id == id)
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goto found_device;
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#endif
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return "???";
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found_device:
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snprintf(buf, sizeof(buf), "%s%d", dp->id_driver->name, dp->id_unit);
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return (buf);
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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 buf[32];
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char *cp;
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const char *name;
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int name_index, off, strayintr;
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/*
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* Initialise strings for bitbucket and stray interrupt counters.
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* These have statically allocated indices 0 and 1 through ICU_LEN.
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*/
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if (intrnames[0] == '\0') {
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off = sprintf(intrnames, "???") + 1;
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for (strayintr = 0; strayintr < ICU_LEN; strayintr++)
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off += sprintf(intrnames + off, "stray irq%d",
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strayintr) + 1;
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}
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name = isa_get_nameunit(device_id);
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if (snprintf(buf, sizeof(buf), "%s irq%d", name, intr) >= sizeof(buf))
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goto use_bitbucket;
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/*
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* Search for `buf' in `intrnames'. In the usual case when it is
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* not found, append it to the end if there is enough space (the \0
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* terminator for the previous string, if any, becomes a separator).
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*/
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for (cp = intrnames, name_index = 0;
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cp != eintrnames && name_index < NR_INTRNAMES;
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cp += strlen(cp) + 1, name_index++) {
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if (*cp == '\0') {
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if (strlen(buf) >= eintrnames - cp)
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break;
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strcpy(cp, buf);
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goto found;
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}
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if (strcmp(cp, buf) == 0)
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goto found;
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}
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use_bitbucket:
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printf("update_intrname: counting %s irq%d as %s\n", name, intr,
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intrnames);
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name_index = 0;
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found:
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intr_countp[intr] = &intrcnt[name_index];
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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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#ifdef FAST_HI
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int select; /* the select register is 8 bits */
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int vector;
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u_int32_t value; /* the window register is 32 bits */
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#endif /* FAST_HI */
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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] = arg;
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#ifdef FAST_HI
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if (flags & INTR_FAST) {
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vector = TPR_FAST_INTS + intr;
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setidt(vector, fastintr[intr],
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SDT_SYS386IGT, SEL_KPL, GSEL(GCODE_SEL, SEL_KPL));
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}
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else {
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vector = TPR_SLOW_INTS + intr;
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#ifdef APIC_INTR_REORDER
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#ifdef APIC_INTR_HIGHPRI_CLOCK
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/* XXX: Hack (kludge?) for more accurate clock. */
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if (intr == apic_8254_intr || intr == 8) {
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vector = TPR_FAST_INTS + intr;
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}
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#endif
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#endif
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setidt(vector, slowintr[intr],
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SDT_SYS386IGT, SEL_KPL, GSEL(GCODE_SEL, SEL_KPL));
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}
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#ifdef APIC_INTR_REORDER
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set_lapic_isrloc(intr, vector);
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#endif
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/*
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* Reprogram the vector in the IO APIC.
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*/
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if (int_to_apicintpin[intr].ioapic >= 0) {
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select = int_to_apicintpin[intr].redirindex;
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value = io_apic_read(int_to_apicintpin[intr].ioapic,
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select) & ~IOART_INTVEC;
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io_apic_write(int_to_apicintpin[intr].ioapic,
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select, value | vector);
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}
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#else
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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);
|
|
MPINTR_UNLOCK();
|
|
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[1 + intr];
|
|
intr_handler[intr] = isa_strayintr;
|
|
intr_mptr[intr] = NULL;
|
|
intr_mask[intr] = HWI_MASK | SWI_MASK;
|
|
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 */
|
|
MPINTR_UNLOCK();
|
|
write_eflags(ef);
|
|
return (0);
|
|
}
|