295 lines
6.6 KiB
C
295 lines
6.6 KiB
C
/* $NetBSD: pci_kn20aa.c,v 1.2 1995/12/24 02:29:45 mycroft Exp $ */
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/*
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* Copyright (c) 1995 Carnegie-Mellon University.
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* All rights reserved.
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*
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* Author: Chris G. Demetriou
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*
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* Permission to use, copy, modify and distribute this software and
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* its documentation is hereby granted, provided that both the copyright
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* notice and this permission notice appear in all copies of the
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* software, derivative works or modified versions, and any portions
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* thereof, and that both notices appear in supporting documentation.
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*
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* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
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* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
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* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
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*
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* Carnegie Mellon requests users of this software to return to
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*
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* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
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* School of Computer Science
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* Carnegie Mellon University
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* Pittsburgh PA 15213-3890
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*
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* any improvements or extensions that they make and grant Carnegie the
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* rights to redistribute these changes.
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*/
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#include <sys/types.h>
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#include <sys/param.h>
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#include <sys/time.h>
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#include <sys/systm.h>
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#include <sys/errno.h>
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#include <sys/malloc.h>
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#include <sys/device.h>
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#include <sys/syslog.h>
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#include <vm/vm.h>
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#include <dev/pci/pcireg.h>
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#include <dev/pci/pcivar.h>
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#include <alpha/pci/ciareg.h>
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#include <alpha/pci/ciavar.h>
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#include <alpha/pci/pci_kn20aa.h>
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#ifndef EVCNT_COUNTERS
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#include <machine/intrcnt.h>
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#endif
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#include "sio.h"
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#if NSIO
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#include <alpha/pci/siovar.h>
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#endif
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void *kn20aa_pci_map_int __P((void *, pci_conftag_t, pci_intr_pin_t,
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pci_intr_line_t, int, int (*func)(void *), void *));
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void kn20aa_pci_unmap_int __P((void *, void *));
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__const struct pci_intr_fns kn20aa_pci_intr_fns = {
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kn20aa_pci_map_int,
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kn20aa_pci_unmap_int,
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};
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#define KN20AA_PCEB_IRQ 31
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#define KN20AA_MAX_IRQ 32
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#define PCI_STRAY_MAX 5
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struct kn20aa_intrhand {
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TAILQ_ENTRY(kn20aa_intrhand) ih_q;
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int (*ih_fun)();
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void *ih_arg;
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u_long ih_count;
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int ih_level;
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};
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TAILQ_HEAD(kn20aa_intrchain, kn20aa_intrhand);
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struct kn20aa_intrchain kn20aa_pci_intrs[KN20AA_MAX_IRQ];
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int kn20aa_pci_strayintrcnt[KN20AA_MAX_IRQ];
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#ifdef EVCNT_COUNTERS
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struct evcnt kn20aa_intr_evcnt;
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#endif
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void kn20aa_pci_strayintr __P((int irq));
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void kn20aa_iointr __P((void *framep, int vec));
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void kn20aa_enable_intr __P((int irq));
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struct kn20aa_intrhand *kn20aa_attach_intr __P((struct kn20aa_intrchain *,
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int, int (*) (void *), void *));
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void
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pci_kn20aa_pickintr(pcf, pcfa, ppf, ppfa, pifp, pifap)
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__const struct pci_conf_fns *pcf;
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__const struct pci_pio_fns *ppf;
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void *pcfa, *ppfa;
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__const struct pci_intr_fns **pifp;
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void **pifap;
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{
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int i;
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struct kn20aa_intrhand *nintrhand;
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for (i = 0; i < KN20AA_MAX_IRQ; i++)
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TAILQ_INIT(&kn20aa_pci_intrs[i]);
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*pifp = &kn20aa_pci_intr_fns;
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*pifap = NULL; /* XXX ? */
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#if NSIO
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sio_intr_setup(ppf, ppfa);
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#endif
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set_iointr(kn20aa_iointr);
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#if NSIO
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kn20aa_enable_intr(KN20AA_PCEB_IRQ);
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#if 0 /* XXX init PCEB interrupt handler? */
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kn20aa_attach_intr(&kn20aa_pci_intrs[KN20AA_PCEB_IRQ], ???, ???, ???);
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#endif
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#endif
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}
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void *
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kn20aa_pci_map_int(ccv, tag, pin, line, level, func, arg)
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void *ccv;
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pci_conftag_t tag;
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pci_intr_pin_t pin;
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pci_intr_line_t line;
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int level;
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int (*func) __P((void *));
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void *arg;
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{
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int device;
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int kn20aa_slot, kn20aa_irq;
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void *ih;
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if (pin == 0) {
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/* No IRQ used. */
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return 0;
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}
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if (pin > 4) {
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printf("pci_map_int: bad interrupt pin %d\n", pin);
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return NULL;
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}
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/*
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* Slot->interrupt translation. Appears to work, though it
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* may not hold up forever.
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*
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* The DEC engineers who did this hardware obviously engaged
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* in random drug testing.
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*/
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switch (device = PCI_TAG_DEVICE(tag)) {
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case 11:
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case 12:
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kn20aa_slot = (device - 11) + 0;
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break;
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case 7:
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kn20aa_slot = 2;
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break;
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case 8:
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kn20aa_slot = 4;
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break;
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case 9:
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kn20aa_slot = 3;
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break;
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default:
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panic("pci_kn20aa_map_int: invalid device number %d\n",
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device);
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}
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kn20aa_irq = (kn20aa_slot * 4) + pin - 1;
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if (kn20aa_irq > KN20AA_MAX_IRQ)
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panic("pci_kn20aa_map_int: kn20aa_irq too large (%d)\n",
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kn20aa_irq);
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#if 0
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printf("kn20aa_attach_intr: func 0x%lx, arg 0x%lx, level %d, irq %d\n",
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func, arg, level, kn20aa_irq);
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#endif
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ih = kn20aa_attach_intr(&kn20aa_pci_intrs[kn20aa_irq], level,
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func, arg);
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kn20aa_enable_intr(kn20aa_irq);
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return (ih);
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}
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void
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kn20aa_pci_unmap_int(pifa, cookie)
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void *pifa;
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void *cookie;
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{
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panic("kn20aa_pci_unmap_int not implemented"); /* XXX */
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}
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/*
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* caught a stray interrupt; notify if not too many seen already.
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*/
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void
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kn20aa_pci_strayintr(irq)
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int irq;
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{
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if (++kn20aa_pci_strayintrcnt[irq] <= PCI_STRAY_MAX)
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log(LOG_ERR, "stray PCI interrupt %d%s\n", irq,
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kn20aa_pci_strayintrcnt[irq] >= PCI_STRAY_MAX ?
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"; stopped logging" : "");
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}
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void
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kn20aa_iointr(framep, vec)
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void *framep;
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int vec;
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{
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struct kn20aa_intrhand *ih;
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int irq, handled;
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if (vec >= 0x900) {
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if (vec >= 0x900 + (KN20AA_MAX_IRQ << 4))
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panic("kn20aa_iointr: vec 0x%x out of range\n", vec);
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irq = (vec - 0x900) >> 4;
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#ifdef EVCNT_COUNTERS
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kn20aa_intr_evcnt.ev_count++;
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#else
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if (KN20AA_MAX_IRQ != INTRCNT_KN20AA_IRQ_LEN)
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panic("kn20aa interrupt counter sizes inconsistent");
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intrcnt[INTRCNT_KN20AA_IRQ + irq]++;
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#endif
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for (ih = kn20aa_pci_intrs[irq].tqh_first, handled = 0;
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ih != NULL; ih = ih->ih_q.tqe_next) {
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int rv;
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rv = (*ih->ih_fun)(ih->ih_arg);
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ih->ih_count++;
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handled = handled || (rv != 0);
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}
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if (!handled)
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kn20aa_pci_strayintr(irq);
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return;
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}
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if (vec >= 0x800) {
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#if NSIO
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sio_iointr(framep, vec);
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#endif
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return;
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}
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panic("kn20aa_iointr: weird vec 0x%x\n", vec);
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}
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void
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kn20aa_enable_intr(irq)
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int irq;
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{
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/*
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* From disassembling the OSF/1 source code:
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* the following appears to enable a given interrupt request.
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* "blech." I'd give valuable body parts for better docs or
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* for a good decompiler.
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*/
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wbflush();
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REGVAL(0x8780000000L + 0x40L) |= (1 << irq); /* XXX */
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wbflush();
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}
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struct kn20aa_intrhand *
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kn20aa_attach_intr(chain, level, func, arg)
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struct kn20aa_intrchain *chain;
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int level;
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int (*func) __P((void *));
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void *arg;
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{
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struct kn20aa_intrhand *nintrhand;
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nintrhand = (struct kn20aa_intrhand *)
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malloc(sizeof *nintrhand, M_DEVBUF, M_WAITOK);
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nintrhand->ih_fun = func;
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nintrhand->ih_arg = arg;
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nintrhand->ih_count = 0;
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nintrhand->ih_level = level;
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TAILQ_INSERT_TAIL(chain, nintrhand, ih_q);
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return (nintrhand);
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}
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