[dragonfly.git] / sys / dev / acpica5 / acpi_pcib.c

/*-
 * Copyright (c) 2000 Michael Smith
 * Copyright (c) 2000 BSDi
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * $FreeBSD: src/sys/dev/acpica/acpi_pcib.c,v 1.60.8.1 2009/04/15 03:14:26 kensmith Exp $
 */

#include "opt_acpi.h"
#include <sys/param.h>
#include <sys/bus.h>
#include <sys/malloc.h>
#include <sys/kernel.h>
#include <machine/smp.h>

#include "acpi.h"
#include <dev/acpica5/acpivar.h>
#include <dev/acpica5/acpi_pcibvar.h>

#include <bus/pci/pcivar.h>
#include <bus/pci/pcireg.h>
#include <bus/pci/pci_cfgreg.h>
#include "pcib_if.h"

/* Hooks for the ACPI CA debugging infrastructure. */
#define _COMPONENT	ACPI_BUS
ACPI_MODULE_NAME("PCI")

ACPI_SERIAL_DECL(pcib, "ACPI PCI bus methods");

/*
 * For locking, we assume the caller is not concurrent since this is
 * triggered by newbus methods.
 */

struct prt_lookup_request {
    ACPI_PCI_ROUTING_TABLE *pr_entry;
    u_int	pr_pin;
    u_int	pr_slot;
};

typedef	void prt_entry_handler(ACPI_PCI_ROUTING_TABLE *entry, void *arg);

static void	prt_attach_devices(ACPI_PCI_ROUTING_TABLE *entry, void *arg);
static void	prt_lookup_device(ACPI_PCI_ROUTING_TABLE *entry, void *arg);
static void	prt_walk_table(ACPI_BUFFER *prt, prt_entry_handler *handler,
		    void *arg);

static void
prt_walk_table(ACPI_BUFFER *prt, prt_entry_handler *handler, void *arg)
{
    ACPI_PCI_ROUTING_TABLE *entry;
    char *prtptr;

    /* First check to see if there is a table to walk. */
    if (prt == NULL || prt->Pointer == NULL)
	return;

    /* Walk the table executing the handler function for each entry. */
    prtptr = prt->Pointer;
    entry = (ACPI_PCI_ROUTING_TABLE *)prtptr;
    while (entry->Length != 0) {
	handler(entry, arg);
	prtptr += entry->Length;
	entry = (ACPI_PCI_ROUTING_TABLE *)prtptr;
    }
}

static void
prt_attach_devices(ACPI_PCI_ROUTING_TABLE *entry, void *arg)
{
    ACPI_HANDLE handle;
    device_t child, pcib;
    int error;

    /* We only care about entries that reference a link device. */
    if (entry->Source == NULL || entry->Source[0] == '\0')
	return;

    /*
     * In practice, we only see SourceIndex's of 0 out in the wild.
     * When indices != 0 have been found, they've been bugs in the ASL.
     */
    if (entry->SourceIndex != 0)
	return;

    /* Lookup the associated handle and device. */
    pcib = (device_t)arg;
    if (ACPI_FAILURE(AcpiGetHandle(ACPI_ROOT_OBJECT, entry->Source, &handle)))
	return;
    child = acpi_get_device(handle);
    if (child == NULL)
	return;

    /* If the device hasn't been probed yet, force it to do so. */
    error = device_probe_and_attach(child);
    if (error != 0) {
	device_printf(pcib, "failed to force attach of %s\n",
	    acpi_name(handle));
	return;
    }

    /* Add a reference for a specific bus/device/pin tuple. */
    acpi_pci_link_add_reference(child, entry->SourceIndex, pcib,
	ACPI_ADR_PCI_SLOT(entry->Address), entry->Pin);
}

int
acpi_pcib_attach(device_t dev, ACPI_BUFFER *prt, int busno)
{
    device_t			child;
    ACPI_STATUS			status;

    ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);

    if (!acpi_DeviceIsPresent(dev)) {
    	/* Caller should already have checked it */
	panic("%s device is not present", __func__);
    }

    ACPI_SERIAL_INIT(pcib);

    /*
     * Get the PCI interrupt routing table for this bus.  If we can't
     * get it, this is not an error but may reduce functionality.  There
     * are several valid bridges in the field that do not have a _PRT, so
     * only warn about missing tables if bootverbose is set.
     */
    prt->Length = ACPI_ALLOCATE_BUFFER;
    status = AcpiGetIrqRoutingTable(acpi_get_handle(dev), prt);
    if (ACPI_FAILURE(status) && (bootverbose || status != AE_NOT_FOUND))
	device_printf(dev,
	    "could not get PCI interrupt routing table for %s - %s\n",
	    acpi_name(acpi_get_handle(dev)), AcpiFormatException(status));

    /*
     * Attach the PCI bus proper.
     */
    if ((child = device_add_child(dev, "pci", busno)) == NULL) {
	device_printf(device_get_parent(dev), "couldn't attach pci bus\n");
	return_VALUE(ENXIO);
    }

    /*
     * Now go scan the bus.
     */
    prt_walk_table(prt, prt_attach_devices, dev);

    return_VALUE (bus_generic_attach(dev));
}

int
acpi_pcib_resume(device_t dev)
{

    return (bus_generic_resume(dev));
}

static void
prt_lookup_device(ACPI_PCI_ROUTING_TABLE *entry, void *arg)
{
    struct prt_lookup_request *pr;

    pr = (struct prt_lookup_request *)arg;
    if (pr->pr_entry != NULL)
	return;

    /*
     * Compare the slot number (high word of Address) and pin number
     * (note that ACPI uses 0 for INTA) to check for a match.
     *
     * Note that the low word of the Address field (function number)
     * is required by the specification to be 0xffff.  We don't risk
     * checking it here.
     */
    if (ACPI_ADR_PCI_SLOT(entry->Address) == pr->pr_slot &&
	entry->Pin == pr->pr_pin)
	    pr->pr_entry = entry;
}

/*
 * Route an interrupt for a child of the bridge.
 */
int
acpi_pcib_route_interrupt(device_t pcib, device_t dev, int pin,
    ACPI_BUFFER *prtbuf)
{
    ACPI_PCI_ROUTING_TABLE *prt;
    struct prt_lookup_request pr;
    ACPI_HANDLE lnkdev;
    int interrupt;

    ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);

    interrupt = PCI_INVALID_IRQ;

    /* ACPI numbers pins 0-3, not 1-4 like the BIOS. */
    pin--;

    ACPI_SERIAL_BEGIN(pcib);

    /* Search for a matching entry in the routing table. */
    pr.pr_entry = NULL;
    pr.pr_pin = pin;
    pr.pr_slot = pci_get_slot(dev);
    prt_walk_table(prtbuf, prt_lookup_device, &pr);
    if (pr.pr_entry == NULL) {
	device_printf(pcib, "no PRT entry for %d.%d.INT%c\n", pci_get_bus(dev),
	    pci_get_slot(dev), 'A' + pin);
	goto out;
    }
    prt = pr.pr_entry;

    if (bootverbose) {
	device_printf(pcib, "matched entry for %d.%d.INT%c",
	    pci_get_bus(dev), pci_get_slot(dev), 'A' + pin);
	if (prt->Source != NULL && prt->Source[0] != '\0')
		kprintf(" (src %s:%u)", prt->Source, prt->SourceIndex);
	kprintf("\n");
    }

    /*
     * If source is empty/NULL, the source index is a GSI and it's hard-wired
     * so we're done.
     *
     * XXX: If the source index is non-zero, ignore the source device and
     * assume that this is a hard-wired entry.
     */
    if (prt->Source == NULL || prt->Source[0] == '\0' ||
	prt->SourceIndex != 0) {
	if (bootverbose)
	    device_printf(pcib, "slot %d INT%c hardwired to IRQ %d\n",
		pci_get_slot(dev), 'A' + pin, prt->SourceIndex);
	if (prt->SourceIndex) {
	    interrupt = prt->SourceIndex;

	    /* TODO MachIntr.intr_find */
	    BUS_CONFIG_INTR(device_get_parent(dev), dev, interrupt,
		INTR_TRIGGER_LEVEL, INTR_POLARITY_LOW);
	} else
	    device_printf(pcib, "error: invalid hard-wired IRQ of 0\n");
	goto out;
    }

    /*
     * We have to find the source device (PCI interrupt link device).
     */
    if (ACPI_FAILURE(AcpiGetHandle(ACPI_ROOT_OBJECT, prt->Source, &lnkdev))) {
	device_printf(pcib, "couldn't find PCI interrupt link device %s\n",
	    prt->Source);
	goto out;
    }
    interrupt = acpi_pci_link_route_interrupt(acpi_get_device(lnkdev),
	prt->SourceIndex);

    if (bootverbose && PCI_INTERRUPT_VALID(interrupt)) {
	device_printf(pcib, "slot %d INT%c routed to irq %d via %s\n",
	    pci_get_slot(dev), 'A' + pin, interrupt, acpi_name(lnkdev));
    }

out:
    ACPI_SERIAL_END(pcib);

    return_VALUE (interrupt);
}

int
acpi_pcib_probe(device_t dev)
{
    /*
     * Don't attach if we're not really there.
     *
     * XXX: This isn't entirely correct since we may be a PCI bus
     * on a hot-plug docking station, etc.
     */
    if (!acpi_DeviceIsPresent(dev))
	return ENXIO;

    if (pci_cfgregopen() == 0)
	return ENXIO;

    return 0;
}
Commit	Line	Data
5ed44076 MD	1	/*-
	2	* Copyright (c) 2000 Michael Smith
	3	* Copyright (c) 2000 BSDi
	4	* All rights reserved.
	5	*
	6	* Redistribution and use in source and binary forms, with or without
	7	* modification, are permitted provided that the following conditions
	8	* are met:
	9	* 1. Redistributions of source code must retain the above copyright
	10	* notice, this list of conditions and the following disclaimer.
	11	* 2. Redistributions in binary form must reproduce the above copyright
	12	* notice, this list of conditions and the following disclaimer in the
	13	* documentation and/or other materials provided with the distribution.
	14	*
	15	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
	16	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	17	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	18	* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
	19	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	20	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	21	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	22	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	23	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	24	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	25	* SUCH DAMAGE.
32af04f7 SW	26	*
32af04f7 SW	27	* $FreeBSD: src/sys/dev/acpica/acpi_pcib.c,v 1.60.8.1 2009/04/15 03:14:26 kensmith Exp $
5ed44076 MD	28	*/
	29
	30	#include "opt_acpi.h"
	31	#include <sys/param.h>
	32	#include <sys/bus.h>
	33	#include <sys/malloc.h>
	34	#include <sys/kernel.h>
10f97674	35	#include <machine/smp.h>
5ed44076 MD	36
5ed44076 MD	37	#include "acpi.h"
10f97674 AP	38	#include <dev/acpica5/acpivar.h>
10f97674 AP	39	#include <dev/acpica5/acpi_pcibvar.h>
5ed44076	40
5ed44076	41	#include <bus/pci/pcivar.h>
10f97674	42	#include <bus/pci/pcireg.h>
2c61a93f	43	#include <bus/pci/pci_cfgreg.h>
5ed44076 MD	44	#include "pcib_if.h"
5ed44076 MD	45
f9d8cd12	46	/* Hooks for the ACPI CA debugging infrastructure. */
5ed44076 MD	47	#define _COMPONENT ACPI_BUS
	48	ACPI_MODULE_NAME("PCI")
	49
10f97674 AP	50	ACPI_SERIAL_DECL(pcib, "ACPI PCI bus methods");
	51
	52	/*
	53	* For locking, we assume the caller is not concurrent since this is
	54	* triggered by newbus methods.
	55	*/
	56
	57	struct prt_lookup_request {
	58	ACPI_PCI_ROUTING_TABLE *pr_entry;
	59	u_int pr_pin;
	60	u_int pr_slot;
	61	};
	62
	63	typedef void prt_entry_handler(ACPI_PCI_ROUTING_TABLE entry, void arg);
	64
	65	static void prt_attach_devices(ACPI_PCI_ROUTING_TABLE entry, void arg);
	66	static void prt_lookup_device(ACPI_PCI_ROUTING_TABLE entry, void arg);
	67	static void prt_walk_table(ACPI_BUFFER prt, prt_entry_handler handler,
	68	void *arg);
	69
10f97674 AP	70	static void
	71	prt_walk_table(ACPI_BUFFER prt, prt_entry_handler handler, void *arg)
	72	{
	73	ACPI_PCI_ROUTING_TABLE *entry;
	74	char *prtptr;
	75
	76	/* First check to see if there is a table to walk. */
	77	if (prt == NULL \|\| prt->Pointer == NULL)
	78	return;
	79
	80	/* Walk the table executing the handler function for each entry. */
	81	prtptr = prt->Pointer;
	82	entry = (ACPI_PCI_ROUTING_TABLE *)prtptr;
	83	while (entry->Length != 0) {
	84	handler(entry, arg);
	85	prtptr += entry->Length;
	86	entry = (ACPI_PCI_ROUTING_TABLE *)prtptr;
	87	}
	88	}
	89
	90	static void
	91	prt_attach_devices(ACPI_PCI_ROUTING_TABLE entry, void arg)
	92	{
	93	ACPI_HANDLE handle;
	94	device_t child, pcib;
	95	int error;
	96
	97	/* We only care about entries that reference a link device. */
	98	if (entry->Source == NULL \|\| entry->Source[0] == '\0')
	99	return;
	100
	101	/*
	102	* In practice, we only see SourceIndex's of 0 out in the wild.
	103	* When indices != 0 have been found, they've been bugs in the ASL.
	104	*/
	105	if (entry->SourceIndex != 0)
	106	return;
	107
	108	/* Lookup the associated handle and device. */
	109	pcib = (device_t)arg;
	110	if (ACPI_FAILURE(AcpiGetHandle(ACPI_ROOT_OBJECT, entry->Source, &handle)))
	111	return;
	112	child = acpi_get_device(handle);
	113	if (child == NULL)
	114	return;
	115
	116	/* If the device hasn't been probed yet, force it to do so. */
	117	error = device_probe_and_attach(child);
	118	if (error != 0) {
	119	device_printf(pcib, "failed to force attach of %s\n",
	120	acpi_name(handle));
	121	return;
	122	}
	123
	124	/* Add a reference for a specific bus/device/pin tuple. */
	125	acpi_pci_link_add_reference(child, entry->SourceIndex, pcib,
	126	ACPI_ADR_PCI_SLOT(entry->Address), entry->Pin);
	127	}
	128
5ed44076 MD	129	int
	130	acpi_pcib_attach(device_t dev, ACPI_BUFFER *prt, int busno)
	131	{
	132	device_t child;
	133	ACPI_STATUS status;
	134
	135	ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
	136
2c61a93f SZ	137	if (!acpi_DeviceIsPresent(dev)) {
2c61a93f SZ	138	/* Caller should already have checked it */
ed20d0e3	139	panic("%s device is not present", __func__);
2c61a93f	140	}
5ed44076	141
5c7ffd75 AP	142	ACPI_SERIAL_INIT(pcib);
5c7ffd75 AP	143
5ed44076	144	/*
f9d8cd12	145	* Get the PCI interrupt routing table for this bus. If we can't
10f97674 AP	146	* get it, this is not an error but may reduce functionality. There
	147	* are several valid bridges in the field that do not have a _PRT, so
	148	* only warn about missing tables if bootverbose is set.
5ed44076 MD	149	*/
	150	prt->Length = ACPI_ALLOCATE_BUFFER;
	151	status = AcpiGetIrqRoutingTable(acpi_get_handle(dev), prt);
10f97674	152	if (ACPI_FAILURE(status) && (bootverbose \|\| status != AE_NOT_FOUND))
5ed44076 MD	153	device_printf(dev,
	154	"could not get PCI interrupt routing table for %s - %s\n",
	155	acpi_name(acpi_get_handle(dev)), AcpiFormatException(status));
	156
	157	/*
	158	* Attach the PCI bus proper.
	159	*/
	160	if ((child = device_add_child(dev, "pci", busno)) == NULL) {
	161	device_printf(device_get_parent(dev), "couldn't attach pci bus\n");
	162	return_VALUE(ENXIO);
	163	}
	164
	165	/*
	166	* Now go scan the bus.
	167	*/
10f97674	168	prt_walk_table(prt, prt_attach_devices, dev);
f9d8cd12 MD	169
f9d8cd12 MD	170	return_VALUE (bus_generic_attach(dev));
5ed44076 MD	171	}
	172
	173	int
10f97674	174	acpi_pcib_resume(device_t dev)
5ed44076	175	{
10f97674	176
5ed44076 MD	177	return (bus_generic_resume(dev));
	178	}
	179
10f97674 AP	180	static void
	181	prt_lookup_device(ACPI_PCI_ROUTING_TABLE entry, void arg)
	182	{
	183	struct prt_lookup_request *pr;
	184
	185	pr = (struct prt_lookup_request *)arg;
	186	if (pr->pr_entry != NULL)
	187	return;
	188
	189	/*
	190	* Compare the slot number (high word of Address) and pin number
	191	* (note that ACPI uses 0 for INTA) to check for a match.
	192	*
	193	* Note that the low word of the Address field (function number)
	194	* is required by the specification to be 0xffff. We don't risk
	195	* checking it here.
	196	*/
	197	if (ACPI_ADR_PCI_SLOT(entry->Address) == pr->pr_slot &&
	198	entry->Pin == pr->pr_pin)
	199	pr->pr_entry = entry;
	200	}
	201
5ed44076 MD	202	/*
5ed44076 MD	203	* Route an interrupt for a child of the bridge.
5ed44076 MD	204	*/
	205	int
	206	acpi_pcib_route_interrupt(device_t pcib, device_t dev, int pin,
	207	ACPI_BUFFER *prtbuf)
	208	{
10f97674 AP	209	ACPI_PCI_ROUTING_TABLE *prt;
	210	struct prt_lookup_request pr;
	211	ACPI_HANDLE lnkdev;
	212	int interrupt;
5ed44076 MD	213
5ed44076 MD	214	ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
10f97674 AP	215
10f97674 AP	216	interrupt = PCI_INVALID_IRQ;
5ed44076	217
f9d8cd12	218	/* ACPI numbers pins 0-3, not 1-4 like the BIOS. */
5ed44076 MD	219	pin--;
5ed44076 MD	220
10f97674	221	ACPI_SERIAL_BEGIN(pcib);
5ed44076	222
10f97674 AP	223	/* Search for a matching entry in the routing table. */
	224	pr.pr_entry = NULL;
	225	pr.pr_pin = pin;
	226	pr.pr_slot = pci_get_slot(dev);
	227	prt_walk_table(prtbuf, prt_lookup_device, &pr);
	228	if (pr.pr_entry == NULL) {
	229	device_printf(pcib, "no PRT entry for %d.%d.INT%c\n", pci_get_bus(dev),
	230	pci_get_slot(dev), 'A' + pin);
5ed44076 MD	231	goto out;
5ed44076 MD	232	}
10f97674 AP	233	prt = pr.pr_entry;
	234
	235	if (bootverbose) {
	236	device_printf(pcib, "matched entry for %d.%d.INT%c",
	237	pci_get_bus(dev), pci_get_slot(dev), 'A' + pin);
	238	if (prt->Source != NULL && prt->Source[0] != '\0')
	239	kprintf(" (src %s:%u)", prt->Source, prt->SourceIndex);
	240	kprintf("\n");
5ed44076 MD	241	}
	242
	243	/*
f7596a00 SZ	244	* If source is empty/NULL, the source index is a GSI and it's hard-wired
f7596a00 SZ	245	* so we're done.
5ed44076	246	*
10f97674 AP	247	* XXX: If the source index is non-zero, ignore the source device and
10f97674 AP	248	* assume that this is a hard-wired entry.
5ed44076	249	*/
10f97674 AP	250	if (prt->Source == NULL \|\| prt->Source[0] == '\0' \|\|
	251	prt->SourceIndex != 0) {
	252	if (bootverbose)
	253	device_printf(pcib, "slot %d INT%c hardwired to IRQ %d\n",
	254	pci_get_slot(dev), 'A' + pin, prt->SourceIndex);
	255	if (prt->SourceIndex) {
	256	interrupt = prt->SourceIndex;
54c3c541 SZ	257
	258	/* TODO MachIntr.intr_find */
	259	BUS_CONFIG_INTR(device_get_parent(dev), dev, interrupt,
	260	INTR_TRIGGER_LEVEL, INTR_POLARITY_LOW);
10f97674 AP	261	} else
10f97674 AP	262	device_printf(pcib, "error: invalid hard-wired IRQ of 0\n");
5ed44076 MD	263	goto out;
	264	}
	265
f9d8cd12	266	/*
10f97674	267	* We have to find the source device (PCI interrupt link device).
f9d8cd12	268	*/
10f97674 AP	269	if (ACPI_FAILURE(AcpiGetHandle(ACPI_ROOT_OBJECT, prt->Source, &lnkdev))) {
	270	device_printf(pcib, "couldn't find PCI interrupt link device %s\n",
	271	prt->Source);
5ed44076 MD	272	goto out;
5ed44076 MD	273	}
10f97674 AP	274	interrupt = acpi_pci_link_route_interrupt(acpi_get_device(lnkdev),
10f97674 AP	275	prt->SourceIndex);
5ed44076	276
10f97674	277	if (bootverbose && PCI_INTERRUPT_VALID(interrupt)) {
6388f614 SZ	278	device_printf(pcib, "slot %d INT%c routed to irq %d via %s\n",
6388f614 SZ	279	pci_get_slot(dev), 'A' + pin, interrupt, acpi_name(lnkdev));
5ed44076	280	}
5ed44076	281
f9d8cd12	282	out:
10f97674 AP	283	ACPI_SERIAL_END(pcib);
10f97674 AP	284
f9d8cd12	285	return_VALUE (interrupt);
5ed44076	286	}
2c61a93f SZ	287
	288	int
	289	acpi_pcib_probe(device_t dev)
	290	{
	291	/*
	292	* Don't attach if we're not really there.
	293	*
	294	* XXX: This isn't entirely correct since we may be a PCI bus
	295	* on a hot-plug docking station, etc.
	296	*/
	297	if (!acpi_DeviceIsPresent(dev))
	298	return ENXIO;
	299
	300	if (pci_cfgregopen() == 0)
	301	return ENXIO;
	302
	303	return 0;
	304	}