232 lines
6.1 KiB
C
232 lines
6.1 KiB
C
/* $NetBSD: pci_machdep_common.c,v 1.8 2008/04/28 20:23:32 martin Exp $ */
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/*-
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* Copyright (c) 2007 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Tim Rightnour
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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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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Generic PowerPC functions for dealing with a PCI bridge. For most cases,
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* these functions will work just fine, however, some machines may need
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* specialized code, so those ports are free to write thier own functions
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* and call those instead where appropriate.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: pci_machdep_common.c,v 1.8 2008/04/28 20:23:32 martin Exp $");
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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/extent.h>
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#include <sys/device.h>
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#include <sys/malloc.h>
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#include <uvm/uvm_extern.h>
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#define _POWERPC_BUS_DMA_PRIVATE
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#include <machine/bus.h>
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#include <machine/intr.h>
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#include <dev/pci/pcivar.h>
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#include <dev/pci/pcireg.h>
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#include <dev/pci/pcidevs.h>
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#include <dev/pci/pciconf.h>
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#include <dev/pci/pciidereg.h>
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/*
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* PCI doesn't have any special needs; just use the generic versions
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* of these functions.
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*/
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struct powerpc_bus_dma_tag pci_bus_dma_tag = {
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0, /* _bounce_thresh */
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_bus_dmamap_create,
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_bus_dmamap_destroy,
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_bus_dmamap_load,
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_bus_dmamap_load_mbuf,
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_bus_dmamap_load_uio,
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_bus_dmamap_load_raw,
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_bus_dmamap_unload,
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NULL, /* _dmamap_sync */
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_bus_dmamem_alloc,
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_bus_dmamem_free,
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_bus_dmamem_map,
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_bus_dmamem_unmap,
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_bus_dmamem_mmap,
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};
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int
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genppc_pci_bus_maxdevs(pci_chipset_tag_t pc, int busno)
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{
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return 32;
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}
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const char *
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genppc_pci_intr_string(void *v, pci_intr_handle_t ih)
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{
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static char irqstr[8]; /* 4 + 2 + NULL + sanity */
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if (ih == 0 || ih >= ICU_LEN
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/* XXX on macppc it's completely legal to have PCI interrupts on a slave PIC */
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#ifdef IRQ_SLAVE
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|| ih == IRQ_SLAVE
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#endif
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)
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panic("pci_intr_string: bogus handle 0x%x", ih);
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sprintf(irqstr, "irq %d", ih);
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return (irqstr);
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}
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const struct evcnt *
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genppc_pci_intr_evcnt(void *v, pci_intr_handle_t ih)
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{
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/* XXX for now, no evcnt parent reported */
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return NULL;
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}
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void *
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genppc_pci_intr_establish(void *v, pci_intr_handle_t ih, int level,
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int (*func)(void *), void *arg)
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{
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if (ih == 0 || ih >= ICU_LEN
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#ifdef IRQ_SLAVE
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|| ih == IRQ_SLAVE
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#endif
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)
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panic("pci_intr_establish: bogus handle 0x%x", ih);
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return intr_establish(ih, IST_LEVEL, level, func, arg);
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}
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void
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genppc_pci_intr_disestablish(void *v, void *cookie)
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{
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intr_disestablish(cookie);
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}
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void
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genppc_pci_conf_interrupt(pci_chipset_tag_t pct, int bus, int dev, int pin,
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int swiz, int *iline)
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{
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/* do nothing */
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}
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int
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genppc_pci_conf_hook(pci_chipset_tag_t pct, int bus, int dev, int func,
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pcireg_t id)
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{
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return (PCI_CONF_DEFAULT);
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}
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int
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genppc_pci_intr_map(struct pci_attach_args *pa, pci_intr_handle_t *ihp)
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{
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int pin = pa->pa_intrpin;
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int line = pa->pa_intrline;
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#ifdef DEBUG
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printf("%s: pin: %d, line: %d\n", __func__, pin, line);
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#endif
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if (pin == 0) {
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/* No IRQ used. */
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aprint_error("pci_intr_map: interrupt pin %d\n", pin);
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goto bad;
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}
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if (pin > 4) {
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aprint_error("pci_intr_map: bad interrupt pin %d\n", pin);
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goto bad;
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}
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/*
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* Section 6.2.4, `Miscellaneous Functions', says that 255 means
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* `unknown' or `no connection' on a PC. We assume that a device with
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* `no connection' either doesn't have an interrupt (in which case the
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* pin number should be 0, and would have been noticed above), or
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* wasn't configured by the BIOS (in which case we punt, since there's
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* no real way we can know how the interrupt lines are mapped in the
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* hardware).
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*
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* XXX
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* Since IRQ 0 is only used by the clock, and we can't actually be sure
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* that the BIOS did its job, we also recognize that as meaning that
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* the BIOS has not configured the device.
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*/
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if (line == 0 || line == 255) {
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aprint_error("pci_intr_map: no mapping for pin %c\n", '@' + pin);
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goto bad;
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} else {
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if (line >= ICU_LEN) {
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aprint_error("pci_intr_map: bad interrupt line %d\n", line);
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goto bad;
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}
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}
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*ihp = line;
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return 0;
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bad:
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*ihp = -1;
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return 1;
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}
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#ifdef __HAVE_PCIIDE_MACHDEP_COMPAT_INTR_ESTABLISH
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#include <machine/isa_machdep.h>
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#include "isa.h"
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void *genppc_pciide_machdep_compat_intr_establish(struct device *,
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struct pci_attach_args *, int, int (*)(void *), void *);
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void *
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genppc_pciide_machdep_compat_intr_establish(struct device *dev,
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struct pci_attach_args *pa, int chan, int (*func)(void *), void *arg)
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{
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#if NISA > 0
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int irq;
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void *cookie;
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irq = PCIIDE_COMPAT_IRQ(chan);
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cookie = isa_intr_establish(NULL, irq, IST_LEVEL, IPL_BIO, func, arg);
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if (cookie == NULL)
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return (NULL);
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printf("%s: %s channel interrupting at irq %d\n", dev->dv_xname,
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PCIIDE_CHANNEL_NAME(chan), irq);
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return (cookie);
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#else
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panic("pciide_machdep_compat_intr_establish() called");
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#endif
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}
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#endif /* __HAVE_PCIIDE_MACHDEP_COMPAT_INTR_ESTABLISH */
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