2dd1bdf183
Summary: Migrate to using the semi-opaque type rman_res_t to specify rman resources. For now, this is still compatible with u_long. This is step one in migrating rman to use uintmax_t for resources instead of u_long. Going forward, this could feasibly be used to specify architecture-specific definitions of resource ranges, rather than baking a specific integer type into the API. This change has been broken out to facilitate MFC'ing drivers back to 10 without breaking ABI. Reviewed By: jhb Sponsored by: Alex Perez/Inertial Computing Differential Revision: https://reviews.freebsd.org/D5075
487 lines
13 KiB
C
487 lines
13 KiB
C
/*-
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* Copyright (c) 2007, Oleksandr Tymoshenko <gonzo@freebsd.org>
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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 for the NetBSD Project by
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* Wasabi Systems, Inc.
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* 4. The name of Wasabi Systems, Inc. may not be used to endorse
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* or promote products derived from this software without specific prior
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* written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
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* 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 WASABI SYSTEMS, INC
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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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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/bus.h>
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#include <sys/interrupt.h>
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#include <sys/kernel.h>
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#include <sys/module.h>
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#include <sys/rman.h>
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#include <sys/malloc.h>
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#include <machine/bus.h>
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#include <mips/idt/idtreg.h>
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#include <mips/idt/obiovar.h>
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#define ICU_REG_READ(o) \
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*((volatile uint32_t *)MIPS_PHYS_TO_KSEG1(IDT_BASE_ICU + (o)))
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#define ICU_REG_WRITE(o,v) (ICU_REG_READ(o)) = (v)
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#define GPIO_REG_READ(o) \
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*((volatile uint32_t *)MIPS_PHYS_TO_KSEG1(IDT_BASE_GPIO + (o)))
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#define GPIO_REG_WRITE(o,v) (GPIO_REG_READ(o)) = (v)
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static int obio_activate_resource(device_t, device_t, int, int,
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struct resource *);
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static device_t obio_add_child(device_t, u_int, const char *, int);
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static struct resource *
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obio_alloc_resource(device_t, device_t, int, int *, rman_res_t,
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rman_res_t, rman_res_t, u_int);
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static int obio_attach(device_t);
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static int obio_deactivate_resource(device_t, device_t, int, int,
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struct resource *);
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static struct resource_list *
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obio_get_resource_list(device_t, device_t);
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static void obio_hinted_child(device_t, const char *, int);
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static int obio_intr(void *);
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static int obio_probe(device_t);
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static int obio_release_resource(device_t, device_t, int, int,
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struct resource *);
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static int obio_setup_intr(device_t, device_t, struct resource *, int,
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driver_filter_t *, driver_intr_t *, void *, void **);
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static int obio_teardown_intr(device_t, device_t, struct resource *,
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void *);
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static void
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obio_mask_irq(void *arg)
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{
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unsigned int irq = (unsigned int)arg;
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int ip_bit, mask, mask_register;
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/* mask IRQ */
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mask_register = ICU_IRQ_MASK_REG(irq);
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ip_bit = ICU_IP_BIT(irq);
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mask = ICU_REG_READ(mask_register);
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ICU_REG_WRITE(mask_register, mask | ip_bit);
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}
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static void
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obio_unmask_irq(void *arg)
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{
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unsigned int irq = (unsigned int)arg;
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int ip_bit, mask, mask_register;
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/* unmask IRQ */
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mask_register = ICU_IRQ_MASK_REG(irq);
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ip_bit = ICU_IP_BIT(irq);
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mask = ICU_REG_READ(mask_register);
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ICU_REG_WRITE(mask_register, mask & ~ip_bit);
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}
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static int
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obio_probe(device_t dev)
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{
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return (BUS_PROBE_NOWILDCARD);
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}
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static int
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obio_attach(device_t dev)
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{
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struct obio_softc *sc = device_get_softc(dev);
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int rid, irq;
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sc->oba_mem_rman.rm_type = RMAN_ARRAY;
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sc->oba_mem_rman.rm_descr = "OBIO memeory";
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if (rman_init(&sc->oba_mem_rman) != 0 ||
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rman_manage_region(&sc->oba_mem_rman, OBIO_MEM_START,
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OBIO_MEM_START + OBIO_MEM_SIZE) != 0)
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panic("obio_attach: failed to set up I/O rman");
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sc->oba_irq_rman.rm_type = RMAN_ARRAY;
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sc->oba_irq_rman.rm_descr = "OBIO IRQ";
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if (rman_init(&sc->oba_irq_rman) != 0 ||
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rman_manage_region(&sc->oba_irq_rman, IRQ_BASE, IRQ_END) != 0)
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panic("obio_attach: failed to set up IRQ rman");
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/* Hook up our interrupt handlers. We should handle IRQ0..IRQ4*/
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for(irq = 0; irq < 5; irq++) {
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if ((sc->sc_irq[irq] = bus_alloc_resource(dev, SYS_RES_IRQ,
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&rid, irq, irq, 1, RF_SHAREABLE | RF_ACTIVE)) == NULL) {
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device_printf(dev, "unable to allocate IRQ resource\n");
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return (ENXIO);
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}
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if ((bus_setup_intr(dev, sc->sc_irq[irq], INTR_TYPE_MISC,
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obio_intr, NULL, sc, &sc->sc_ih[irq]))) {
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device_printf(dev,
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"WARNING: unable to register interrupt handler\n");
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return (ENXIO);
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}
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}
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bus_generic_probe(dev);
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bus_enumerate_hinted_children(dev);
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bus_generic_attach(dev);
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return (0);
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}
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static struct resource *
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obio_alloc_resource(device_t bus, device_t child, int type, int *rid,
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rman_res_t start, rman_res_t end, rman_res_t count, u_int flags)
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{
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struct obio_softc *sc = device_get_softc(bus);
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struct obio_ivar *ivar = device_get_ivars(child);
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struct resource *rv;
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struct resource_list_entry *rle;
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struct rman *rm;
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int isdefault, needactivate, passthrough;
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isdefault = (start == 0UL && end == ~0UL);
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needactivate = flags & RF_ACTIVE;
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passthrough = (device_get_parent(child) != bus);
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rle = NULL;
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if (passthrough)
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return (BUS_ALLOC_RESOURCE(device_get_parent(bus), child, type,
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rid, start, end, count, flags));
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/*
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* If this is an allocation of the "default" range for a given RID,
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* and we know what the resources for this device are (ie. they aren't
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* maintained by a child bus), then work out the start/end values.
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*/
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if (isdefault) {
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rle = resource_list_find(&ivar->resources, type, *rid);
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if (rle == NULL)
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return (NULL);
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if (rle->res != NULL) {
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panic("%s: resource entry is busy", __func__);
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}
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start = rle->start;
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end = rle->end;
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count = rle->count;
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}
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switch (type) {
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case SYS_RES_IRQ:
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rm = &sc->oba_irq_rman;
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break;
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case SYS_RES_MEMORY:
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rm = &sc->oba_mem_rman;
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break;
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default:
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printf("%s: unknown resource type %d\n", __func__, type);
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return (0);
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}
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rv = rman_reserve_resource(rm, start, end, count, flags, child);
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if (rv == 0) {
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printf("%s: could not reserve resource\n", __func__);
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return (0);
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}
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rman_set_rid(rv, *rid);
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if (needactivate) {
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if (bus_activate_resource(child, type, *rid, rv)) {
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printf("%s: could not activate resource\n", __func__);
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rman_release_resource(rv);
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return (0);
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}
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}
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return (rv);
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}
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static int
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obio_activate_resource(device_t bus, device_t child, int type, int rid,
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struct resource *r)
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{
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/* XXX: should we mask/unmask IRQ here? */
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return (BUS_ACTIVATE_RESOURCE(device_get_parent(bus), child,
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type, rid, r));
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}
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static int
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obio_deactivate_resource(device_t bus, device_t child, int type, int rid,
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struct resource *r)
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{
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/* XXX: should we mask/unmask IRQ here? */
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return (BUS_DEACTIVATE_RESOURCE(device_get_parent(bus), child,
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type, rid, r));
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}
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static int
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obio_release_resource(device_t dev, device_t child, int type,
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int rid, struct resource *r)
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{
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struct resource_list *rl;
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struct resource_list_entry *rle;
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rl = obio_get_resource_list(dev, child);
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if (rl == NULL)
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return (EINVAL);
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rle = resource_list_find(rl, type, rid);
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if (rle == NULL)
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return (EINVAL);
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rman_release_resource(r);
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rle->res = NULL;
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return (0);
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}
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static int
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obio_setup_intr(device_t dev, device_t child, struct resource *ires,
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int flags, driver_filter_t *filt, driver_intr_t *handler,
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void *arg, void **cookiep)
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{
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struct obio_softc *sc = device_get_softc(dev);
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struct intr_event *event;
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int irq, ip_bit, error, mask, mask_register;
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irq = rman_get_start(ires);
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if (irq >= NIRQS)
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panic("%s: bad irq %d", __func__, irq);
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event = sc->sc_eventstab[irq];
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if (event == NULL) {
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error = intr_event_create(&event, (void *)irq, 0, irq,
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obio_mask_irq, obio_unmask_irq,
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NULL, NULL,
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"obio intr%d:", irq);
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sc->sc_eventstab[irq] = event;
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}
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intr_event_add_handler(event, device_get_nameunit(child), filt,
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handler, arg, intr_priority(flags), flags, cookiep);
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/* unmask IRQ */
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mask_register = ICU_IRQ_MASK_REG(irq);
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ip_bit = ICU_IP_BIT(irq);
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mask = ICU_REG_READ(mask_register);
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ICU_REG_WRITE(mask_register, mask & ~ip_bit);
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return (0);
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}
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static int
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obio_teardown_intr(device_t dev, device_t child, struct resource *ires,
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void *cookie)
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{
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struct obio_softc *sc = device_get_softc(dev);
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int irq, result;
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uint32_t mask_register, mask, ip_bit;
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irq = rman_get_start(ires);
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if (irq >= NIRQS)
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panic("%s: bad irq %d", __func__, irq);
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if (sc->sc_eventstab[irq] == NULL)
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panic("Trying to teardown unoccupied IRQ");
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/* mask IRQ */
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mask_register = ICU_IRQ_MASK_REG(irq);
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ip_bit = ICU_IP_BIT(irq);
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mask = ICU_REG_READ(mask_register);
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ICU_REG_WRITE(mask_register, mask | ip_bit);
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result = intr_event_remove_handler(cookie);
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if (!result)
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sc->sc_eventstab[irq] = NULL;
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return (result);
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}
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static int
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obio_intr(void *arg)
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{
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struct obio_softc *sc = arg;
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struct intr_event *event;
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uint32_t irqstat, ipend, imask, xpend;
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int irq, thread, group, i;
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irqstat = 0;
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irq = 0;
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for (group = 2; group <= 6; group++) {
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ipend = ICU_REG_READ(ICU_GROUP_IPEND_REG(group));
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imask = ICU_REG_READ(ICU_GROUP_MASK_REG(group));
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xpend = ipend;
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ipend &= ~imask;
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while ((i = fls(xpend)) != 0) {
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xpend &= ~(1 << (i - 1));
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irq = IP_IRQ(group, i - 1);
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}
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while ((i = fls(ipend)) != 0) {
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ipend &= ~(1 << (i - 1));
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irq = IP_IRQ(group, i - 1);
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event = sc->sc_eventstab[irq];
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thread = 0;
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if (!event || TAILQ_EMPTY(&event->ie_handlers)) {
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/* TODO: Log stray IRQs */
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continue;
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}
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/* TODO: frame instead of NULL? */
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intr_event_handle(event, NULL);
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/* XXX: Log stray IRQs */
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}
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}
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#if 0
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ipend = ICU_REG_READ(ICU_IPEND2);
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printf("ipend2 = %08x!\n", ipend);
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ipend = ICU_REG_READ(ICU_IPEND3);
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printf("ipend3 = %08x!\n", ipend);
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ipend = ICU_REG_READ(ICU_IPEND4);
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printf("ipend4 = %08x!\n", ipend);
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ipend = ICU_REG_READ(ICU_IPEND5);
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printf("ipend5 = %08x!\n", ipend);
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ipend = ICU_REG_READ(ICU_IPEND6);
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printf("ipend6 = %08x!\n", ipend);
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#endif
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while (irqstat != 0) {
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if ((irqstat & 1) == 1) {
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}
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irq++;
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irqstat >>= 1;
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}
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return (FILTER_HANDLED);
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}
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static void
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obio_hinted_child(device_t bus, const char *dname, int dunit)
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{
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device_t child;
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long maddr;
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int msize;
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int irq;
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int result;
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child = BUS_ADD_CHILD(bus, 0, dname, dunit);
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/*
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* Set hard-wired resources for hinted child using
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* specific RIDs.
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*/
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resource_long_value(dname, dunit, "maddr", &maddr);
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resource_int_value(dname, dunit, "msize", &msize);
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result = bus_set_resource(child, SYS_RES_MEMORY, 0,
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maddr, msize);
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if (result != 0)
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device_printf(bus, "warning: bus_set_resource() failed\n");
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if (resource_int_value(dname, dunit, "irq", &irq) == 0) {
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result = bus_set_resource(child, SYS_RES_IRQ, 0, irq, 1);
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if (result != 0)
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device_printf(bus,
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"warning: bus_set_resource() failed\n");
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}
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}
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static device_t
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obio_add_child(device_t bus, u_int order, const char *name, int unit)
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{
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device_t child;
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struct obio_ivar *ivar;
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ivar = malloc(sizeof(struct obio_ivar), M_DEVBUF, M_WAITOK | M_ZERO);
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if (ivar == NULL) {
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printf("Failed to allocate ivar\n");
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return (0);
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}
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resource_list_init(&ivar->resources);
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child = device_add_child_ordered(bus, order, name, unit);
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if (child == NULL) {
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printf("Can't add child %s%d ordered\n", name, unit);
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return (0);
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}
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device_set_ivars(child, ivar);
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return (child);
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}
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/*
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* Helper routine for bus_generic_rl_get_resource/bus_generic_rl_set_resource
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* Provides pointer to resource_list for these routines
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*/
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static struct resource_list *
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obio_get_resource_list(device_t dev, device_t child)
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{
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struct obio_ivar *ivar;
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ivar = device_get_ivars(child);
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return (&(ivar->resources));
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}
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static device_method_t obio_methods[] = {
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DEVMETHOD(bus_activate_resource, obio_activate_resource),
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DEVMETHOD(bus_add_child, obio_add_child),
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DEVMETHOD(bus_alloc_resource, obio_alloc_resource),
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DEVMETHOD(bus_deactivate_resource, obio_deactivate_resource),
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DEVMETHOD(bus_get_resource_list, obio_get_resource_list),
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DEVMETHOD(bus_hinted_child, obio_hinted_child),
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DEVMETHOD(bus_release_resource, obio_release_resource),
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DEVMETHOD(bus_setup_intr, obio_setup_intr),
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DEVMETHOD(bus_teardown_intr, obio_teardown_intr),
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DEVMETHOD(device_attach, obio_attach),
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DEVMETHOD(device_probe, obio_probe),
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DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource),
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DEVMETHOD(bus_set_resource, bus_generic_rl_set_resource),
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{0, 0},
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};
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static driver_t obio_driver = {
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"obio",
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obio_methods,
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sizeof(struct obio_softc),
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};
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static devclass_t obio_devclass;
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DRIVER_MODULE(obio, nexus, obio_driver, obio_devclass, 0, 0);
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