[dragonfly.git] / sys / bus / pci / i386 / legacy.c

/*-
 * Copyright 1998 Massachusetts Institute of Technology
 *
 * Permission to use, copy, modify, and distribute this software and
 * its documentation for any purpose and without fee is hereby
 * granted, provided that both the above copyright notice and this
 * permission notice appear in all copies, that both the above
 * copyright notice and this permission notice appear in all
 * supporting documentation, and that the name of M.I.T. not be used
 * in advertising or publicity pertaining to distribution of the
 * software without specific, written prior permission.  M.I.T. makes
 * no representations about the suitability of this software for any
 * purpose.  It is provided "as is" without express or implied
 * warranty.
 *
 * THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''.  M.I.T. DISCLAIMS
 * ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE,
 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT
 * SHALL M.I.T. 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.
 * __FBSDID("$FreeBSD: src/sys/i386/i386/legacy.c,v 1.63.2.1.4.1 2009/04/15 03:14:26 kensmith Exp $");
 */

#include <sys/cdefs.h>

/*
 * This code implements a system driver for legacy systems that do not
 * support ACPI or when ACPI support is not present in the kernel.
 */

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bus.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/module.h>
#include <sys/rman.h>

#undef DEV_MCA
#ifdef DEV_MCA
#include <i386/bios/mca_machdep.h>
#endif

#include <machine/legacyvar.h>

static MALLOC_DEFINE(M_LEGACYDEV, "legacydrv", "legacy system device");
struct legacy_device {
	int			lg_pcibus;
};

#define DEVTOAT(dev)	((struct legacy_device *)device_get_ivars(dev))

static int	legacy_identify(driver_t *, device_t);
static int	legacy_probe(device_t);
static int	legacy_attach(device_t);
static int	legacy_print_child(device_t, device_t);
static device_t	legacy_add_child(device_t, device_t, int, const char *, int);
static int	legacy_read_ivar(device_t, device_t, int, uintptr_t *);
static int	legacy_write_ivar(device_t, device_t, int, uintptr_t);

static device_method_t legacy_methods[] = {
	/* Device interface */
	DEVMETHOD(device_identify,	legacy_identify),
	DEVMETHOD(device_probe,		legacy_probe),
	DEVMETHOD(device_attach,	legacy_attach),
	DEVMETHOD(device_detach,	bus_generic_detach),
	DEVMETHOD(device_shutdown,	bus_generic_shutdown),
	DEVMETHOD(device_suspend,	bus_generic_suspend),
	DEVMETHOD(device_resume,	bus_generic_resume),

	/* Bus interface */
	DEVMETHOD(bus_print_child,	legacy_print_child),
	DEVMETHOD(bus_add_child,	legacy_add_child),
	DEVMETHOD(bus_read_ivar,	legacy_read_ivar),
	DEVMETHOD(bus_write_ivar,	legacy_write_ivar),
	DEVMETHOD(bus_alloc_resource,	bus_generic_alloc_resource),
	DEVMETHOD(bus_release_resource,	bus_generic_release_resource),
	DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
	DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
	DEVMETHOD(bus_setup_intr,	bus_generic_setup_intr),
	DEVMETHOD(bus_teardown_intr,	bus_generic_teardown_intr),

	{ 0, 0 }
};

static driver_t legacy_driver = {
	"legacy",
	legacy_methods,
	1,			/* no softc */
};
static devclass_t legacy_devclass;

DRIVER_MODULE(legacy, nexus, legacy_driver, legacy_devclass, 0, 0);

static int
legacy_identify(driver_t *driver, device_t parent)
{
	/*
	 * Basically a static device, there's no point reinstalling it
	 * on rescan.
	 */
	if (device_get_state(parent) == DS_ATTACHED)
		return (0);
	if (device_get_state(parent) == DS_INPROGRESS)
		return (0);

	/*
	 * Add child device with order of 11 so it gets probed
	 * after ACPI (which is at order 10).
	 */
	if (BUS_ADD_CHILD(parent, parent, 11, "legacy", 0) == NULL)
		panic("legacy: could not attach");
	return (0);
}

static int
legacy_probe(device_t dev)
{
#ifdef ACPI_ENABLE_PCI
	device_t acpi;

	/*
	 * Fail to probe if ACPI is ok.
	 */
	acpi = devclass_get_device(devclass_find("acpi"), 0);
	if (acpi != NULL && device_is_alive(acpi))
		return (ENXIO);
#endif	/* ACPI_ENABLE_PCI */
	device_set_desc(dev, "legacy system");
	device_quiet(dev);
	return (0);
}

static int
legacy_attach(device_t dev)
{
	device_t child;

	/*
	 * Let our child drivers identify any child devices that they
	 * can find.  Once that is done attach any devices that we
	 * found.
	 */
	bus_generic_probe(dev);
	bus_generic_attach(dev);

	/*
	 * If we didn't see EISA or ISA on a pci bridge, create some
	 * connection points now so they show up "on motherboard".
	 */
	if (!devclass_get_device(devclass_find("eisa"), 0)) {
		child = BUS_ADD_CHILD(dev, dev, 0, "eisa", 0);
		if (child == NULL)
			panic("legacy_attach eisa");
		device_probe_and_attach(child);
	}
#ifdef DEV_MCA
	if (MCA_system && !devclass_get_device(devclass_find("mca"), 0)) {
		child = BUS_ADD_CHILD(dev, dev, 0, "mca", 0);
		if (child == 0)
			panic("legacy_probe mca");
		device_probe_and_attach(child);
	}
#endif
	if (!devclass_get_device(devclass_find("isa"), 0)) {
		child = BUS_ADD_CHILD(dev, dev, 0, "isa", 0);
		if (child == NULL)
			panic("legacy_attach isa");
		device_probe_and_attach(child);
	}

	return 0;
}

static int
legacy_print_child(device_t bus, device_t child)
{
	struct legacy_device *atdev = DEVTOAT(child);
	int retval = 0;

	retval += bus_print_child_header(bus, child);
	if (atdev->lg_pcibus != -1)
		retval += kprintf(" pcibus %d", atdev->lg_pcibus);
	retval += kprintf(" on motherboard\n");	/* XXX "motherboard", ick */

	return (retval);
}

static device_t
legacy_add_child(device_t bus, device_t parent, int order, const char *name, int unit)
{
	device_t child;
	struct legacy_device *atdev;
	atdev = kmalloc(sizeof(struct legacy_device), M_LEGACYDEV,
	    M_NOWAIT | M_ZERO);
	if (atdev == NULL)
		return(NULL);
	atdev->lg_pcibus = -1;

	child = device_add_child_ordered(bus, order, name, unit);
	if (child == NULL) {
		kfree(atdev, M_LEGACYDEV);
	}
	else {
		/* should we kfree this in legacy_child_detached? */
		device_set_ivars(child, atdev);
	}
	return (child);
}

static int
legacy_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
{
	struct legacy_device *atdev = DEVTOAT(child);

	switch (which) {
	case LEGACY_IVAR_PCIDOMAIN:
		*result = 0;
		break;
	case LEGACY_IVAR_PCIBUS:
		*result = atdev->lg_pcibus;
		break;
	default:
		return ENOENT;
	}
	return 0;
}

static int
legacy_write_ivar(device_t dev, device_t child, int which, uintptr_t value)
{
	struct legacy_device *atdev = DEVTOAT(child);

	switch (which) {
	case LEGACY_IVAR_PCIDOMAIN:
		return EINVAL;
	case LEGACY_IVAR_PCIBUS:
		atdev->lg_pcibus = value;
		break;
	default:
		return ENOENT;
	}
	return 0;
}

#ifdef notyet
/*
 * Legacy CPU attachment when ACPI is not available.  Drivers like
 * cpufreq(4) hang off this.
 */
static void	cpu_identify(driver_t *driver, device_t parent);
static int	cpu_read_ivar(device_t dev, device_t child, int index,
		    uintptr_t *result);
static device_t cpu_add_child(device_t bus, int order, const char *name,
		    int unit);
static struct resource_list *cpu_get_rlist(device_t dev, device_t child);

struct cpu_device {
	struct resource_list cd_rl;
	struct pcpu *cd_pcpu;
};

static device_method_t cpu_methods[] = {
	/* Device interface */
	DEVMETHOD(device_identify,	cpu_identify),
	DEVMETHOD(device_probe,		bus_generic_probe),
	DEVMETHOD(device_attach,	bus_generic_attach),
	DEVMETHOD(device_detach,	bus_generic_detach),
	DEVMETHOD(device_shutdown,	bus_generic_shutdown),
	DEVMETHOD(device_suspend,	bus_generic_suspend),
	DEVMETHOD(device_resume,	bus_generic_resume),

	/* Bus interface */
	DEVMETHOD(bus_add_child,	cpu_add_child),
	DEVMETHOD(bus_read_ivar,	cpu_read_ivar),
	DEVMETHOD(bus_print_child,	bus_generic_print_child),
	DEVMETHOD(bus_get_resource_list, cpu_get_rlist),
	DEVMETHOD(bus_get_resource,	bus_generic_rl_get_resource),
	DEVMETHOD(bus_set_resource,	bus_generic_rl_set_resource),
	DEVMETHOD(bus_alloc_resource,	bus_generic_rl_alloc_resource),
	DEVMETHOD(bus_release_resource,	bus_generic_rl_release_resource),
	DEVMETHOD(bus_driver_added,	bus_generic_driver_added),
	DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
	DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
	DEVMETHOD(bus_setup_intr,	bus_generic_setup_intr),
	DEVMETHOD(bus_teardown_intr,	bus_generic_teardown_intr),

	{ 0, 0 }
};

static driver_t cpu_driver = {
	"cpu",
	cpu_methods,
	1,		/* no softc */
};
static devclass_t cpu_devclass;
DRIVER_MODULE(cpu, legacy, cpu_driver, cpu_devclass, 0, 0);

static void
cpu_identify(driver_t *driver, device_t parent)
{
	device_t child;
	int i;

	/*
	 * Attach a cpuX device for each CPU.  We use an order of 150
	 * so that these devices are attached after the Host-PCI
	 * bridges (which are added at order 100).
	 */
	for (i = 0; i <= mp_maxid; i++)
		if (!CPU_ABSENT(i)) {
			child = BUS_ADD_CHILD(parent, 150, "cpu", i);
			if (child == NULL)
				panic("legacy_attach cpu");
		}
}

static device_t
cpu_add_child(device_t bus, int order, const char *name, int unit)
{
	struct cpu_device *cd;
	device_t child;
	struct pcpu *pc;

	if ((cd = kmalloc(sizeof(*cd), M_DEVBUF, M_NOWAIT | M_ZERO)) == NULL)
		return (NULL);

	resource_list_init(&cd->cd_rl);
	pc = pcpu_find(device_get_unit(bus));
	cd->cd_pcpu = pc;

	child = device_add_child_ordered(bus, order, name, unit);
	if (child != NULL) {
		pc->pc_device = child;
		device_set_ivars(child, cd);
	} else
		kfree(cd, M_DEVBUF);
	return (child);
}

static struct resource_list *
cpu_get_rlist(device_t dev, device_t child)
{
	struct cpu_device *cpdev;

	cpdev = device_get_ivars(child);
	return (&cpdev->cd_rl);
}

static int
cpu_read_ivar(device_t dev, device_t child, int index, uintptr_t *result)
{
	struct cpu_device *cpdev;

	if (index != CPU_IVAR_PCPU)
		return (ENOENT);
	cpdev = device_get_ivars(child);
	*result = (uintptr_t)cpdev->cd_pcpu;
	return (0);
}
#endif
Commit	Line	Data
4d28e78f SZ	1	/*-
	2	* Copyright 1998 Massachusetts Institute of Technology
	3	*
	4	* Permission to use, copy, modify, and distribute this software and
	5	* its documentation for any purpose and without fee is hereby
	6	* granted, provided that both the above copyright notice and this
	7	* permission notice appear in all copies, that both the above
	8	* copyright notice and this permission notice appear in all
	9	* supporting documentation, and that the name of M.I.T. not be used
	10	* in advertising or publicity pertaining to distribution of the
	11	* software without specific, written prior permission. M.I.T. makes
	12	* no representations about the suitability of this software for any
	13	* purpose. It is provided "as is" without express or implied
	14	* warranty.
	15	*
	16	* THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''. M.I.T. DISCLAIMS
	17	* ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE,
	18	* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
	19	* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT
	20	* SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
	21	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
	22	* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
	23	* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
	24	* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
	25	* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
	26	* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	27	* SUCH DAMAGE.
	28	* __FBSDID("$FreeBSD: src/sys/i386/i386/legacy.c,v 1.63.2.1.4.1 2009/04/15 03:14:26 kensmith Exp $");
	29	*/
	30
	31	#include <sys/cdefs.h>
	32
	33	/*
	34	* This code implements a system driver for legacy systems that do not
	35	* support ACPI or when ACPI support is not present in the kernel.
	36	*/
	37
	38	#include <sys/param.h>
	39	#include <sys/systm.h>
	40	#include <sys/bus.h>
	41	#include <sys/kernel.h>
	42	#include <sys/malloc.h>
	43	#include <sys/module.h>
	44	#include <sys/rman.h>
	45
	46	#undef DEV_MCA
	47	#ifdef DEV_MCA
	48	#include <i386/bios/mca_machdep.h>
	49	#endif
	50
	51	#include <machine/legacyvar.h>
	52
	53	static MALLOC_DEFINE(M_LEGACYDEV, "legacydrv", "legacy system device");
	54	struct legacy_device {
	55	int lg_pcibus;
	56	};
	57
	58	#define DEVTOAT(dev) ((struct legacy_device *)device_get_ivars(dev))
	59
d7e2190c SZ	60	static int legacy_identify(driver_t *, device_t);
	61	static int legacy_probe(device_t);
	62	static int legacy_attach(device_t);
	63	static int legacy_print_child(device_t, device_t);
	64	static device_t legacy_add_child(device_t, device_t, int, const char *, int);
	65	static int legacy_read_ivar(device_t, device_t, int, uintptr_t *);
	66	static int legacy_write_ivar(device_t, device_t, int, uintptr_t);
4d28e78f SZ	67
	68	static device_method_t legacy_methods[] = {
	69	/* Device interface */
	70	DEVMETHOD(device_identify, legacy_identify),
	71	DEVMETHOD(device_probe, legacy_probe),
	72	DEVMETHOD(device_attach, legacy_attach),
	73	DEVMETHOD(device_detach, bus_generic_detach),
	74	DEVMETHOD(device_shutdown, bus_generic_shutdown),
	75	DEVMETHOD(device_suspend, bus_generic_suspend),
	76	DEVMETHOD(device_resume, bus_generic_resume),
	77
	78	/* Bus interface */
	79	DEVMETHOD(bus_print_child, legacy_print_child),
	80	DEVMETHOD(bus_add_child, legacy_add_child),
	81	DEVMETHOD(bus_read_ivar, legacy_read_ivar),
	82	DEVMETHOD(bus_write_ivar, legacy_write_ivar),
	83	DEVMETHOD(bus_alloc_resource, bus_generic_alloc_resource),
	84	DEVMETHOD(bus_release_resource, bus_generic_release_resource),
	85	DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
	86	DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
	87	DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
	88	DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
	89
	90	{ 0, 0 }
	91	};
	92
	93	static driver_t legacy_driver = {
	94	"legacy",
	95	legacy_methods,
	96	1, /* no softc */
	97	};
	98	static devclass_t legacy_devclass;
	99
	100	DRIVER_MODULE(legacy, nexus, legacy_driver, legacy_devclass, 0, 0);
	101
d7e2190c	102	static int
4d28e78f SZ	103	legacy_identify(driver_t *driver, device_t parent)
4d28e78f SZ	104	{
31af9194 SZ	105	/*
	106	* Basically a static device, there's no point reinstalling it
	107	* on rescan.
	108	*/
	109	if (device_get_state(parent) == DS_ATTACHED)
	110	return (0);
	111	if (device_get_state(parent) == DS_INPROGRESS)
	112	return (0);
	113
4d28e78f SZ	114	/*
	115	* Add child device with order of 11 so it gets probed
	116	* after ACPI (which is at order 10).
	117	*/
	118	if (BUS_ADD_CHILD(parent, parent, 11, "legacy", 0) == NULL)
	119	panic("legacy: could not attach");
d7e2190c	120	return (0);
4d28e78f SZ	121	}
	122
	123	static int
	124	legacy_probe(device_t dev)
	125	{
370027a6	126	#ifdef ACPI_ENABLE_PCI
4d28e78f SZ	127	device_t acpi;
	128
	129	/*
	130	* Fail to probe if ACPI is ok.
	131	*/
	132	acpi = devclass_get_device(devclass_find("acpi"), 0);
	133	if (acpi != NULL && device_is_alive(acpi))
	134	return (ENXIO);
370027a6	135	#endif /* ACPI_ENABLE_PCI */
4d28e78f SZ	136	device_set_desc(dev, "legacy system");
	137	device_quiet(dev);
	138	return (0);
	139	}
	140
	141	static int
	142	legacy_attach(device_t dev)
	143	{
	144	device_t child;
	145
	146	/*
	147	* Let our child drivers identify any child devices that they
	148	* can find. Once that is done attach any devices that we
	149	* found.
	150	*/
	151	bus_generic_probe(dev);
	152	bus_generic_attach(dev);
	153
4d28e78f SZ	154	/*
	155	* If we didn't see EISA or ISA on a pci bridge, create some
	156	* connection points now so they show up "on motherboard".
	157	*/
	158	if (!devclass_get_device(devclass_find("eisa"), 0)) {
	159	child = BUS_ADD_CHILD(dev, dev, 0, "eisa", 0);
	160	if (child == NULL)
	161	panic("legacy_attach eisa");
	162	device_probe_and_attach(child);
	163	}
4d28e78f SZ	164	#ifdef DEV_MCA
	165	if (MCA_system && !devclass_get_device(devclass_find("mca"), 0)) {
	166	child = BUS_ADD_CHILD(dev, dev, 0, "mca", 0);
	167	if (child == 0)
	168	panic("legacy_probe mca");
	169	device_probe_and_attach(child);
	170	}
	171	#endif
	172	if (!devclass_get_device(devclass_find("isa"), 0)) {
	173	child = BUS_ADD_CHILD(dev, dev, 0, "isa", 0);
	174	if (child == NULL)
	175	panic("legacy_attach isa");
	176	device_probe_and_attach(child);
	177	}
	178
	179	return 0;
	180	}
	181
	182	static int
	183	legacy_print_child(device_t bus, device_t child)
	184	{
	185	struct legacy_device *atdev = DEVTOAT(child);
	186	int retval = 0;
	187
	188	retval += bus_print_child_header(bus, child);
	189	if (atdev->lg_pcibus != -1)
	190	retval += kprintf(" pcibus %d", atdev->lg_pcibus);
	191	retval += kprintf(" on motherboard\n"); /* XXX "motherboard", ick */
	192
	193	return (retval);
	194	}
	195
	196	static device_t
	197	legacy_add_child(device_t bus, device_t parent, int order, const char *name, int unit)
	198	{
	199	device_t child;
	200	struct legacy_device *atdev;
	201	atdev = kmalloc(sizeof(struct legacy_device), M_LEGACYDEV,
	202	M_NOWAIT \| M_ZERO);
	203	if (atdev == NULL)
	204	return(NULL);
	205	atdev->lg_pcibus = -1;
	206
	207	child = device_add_child_ordered(bus, order, name, unit);
	208	if (child == NULL) {
	209	kfree(atdev, M_LEGACYDEV);
	210	}
	211	else {
	212	/* should we kfree this in legacy_child_detached? */
	213	device_set_ivars(child, atdev);
	214	}
	215	return (child);
	216	}
	217
	218	static int
	219	legacy_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
	220	{
	221	struct legacy_device *atdev = DEVTOAT(child);
	222
	223	switch (which) {
	224	case LEGACY_IVAR_PCIDOMAIN:
	225	*result = 0;
	226	break;
	227	case LEGACY_IVAR_PCIBUS:
228	*result = atdev->lg_pcibus;
229	break;
230	default:
231	return ENOENT;
232	}
233	return 0;
234	}
235
236	static int
237	legacy_write_ivar(device_t dev, device_t child, int which, uintptr_t value)
238	{
239	struct legacy_device *atdev = DEVTOAT(child);
240
241	switch (which) {
242	case LEGACY_IVAR_PCIDOMAIN:
243	return EINVAL;
244	case LEGACY_IVAR_PCIBUS:
245	atdev->lg_pcibus = value;
246	break;
247	default:
248	return ENOENT;
249	}
250	return 0;
251	}
252
253	#ifdef notyet
254	/*
255	* Legacy CPU attachment when ACPI is not available. Drivers like
256	* cpufreq(4) hang off this.
257	*/
258	static void cpu_identify(driver_t *driver, device_t parent);
259	static int cpu_read_ivar(device_t dev, device_t child, int index,
260	uintptr_t *result);
261	static device_t cpu_add_child(device_t bus, int order, const char *name,
262	int unit);
263	static struct resource_list *cpu_get_rlist(device_t dev, device_t child);
264
265	struct cpu_device {
266	struct resource_list cd_rl;
267	struct pcpu *cd_pcpu;
268	};
269
270	static device_method_t cpu_methods[] = {
271	/* Device interface */
272	DEVMETHOD(device_identify, cpu_identify),
273	DEVMETHOD(device_probe, bus_generic_probe),
274	DEVMETHOD(device_attach, bus_generic_attach),
275	DEVMETHOD(device_detach, bus_generic_detach),
276	DEVMETHOD(device_shutdown, bus_generic_shutdown),
277	DEVMETHOD(device_suspend, bus_generic_suspend),
278	DEVMETHOD(device_resume, bus_generic_resume),
279
280	/* Bus interface */
281	DEVMETHOD(bus_add_child, cpu_add_child),
282	DEVMETHOD(bus_read_ivar, cpu_read_ivar),
283	DEVMETHOD(bus_print_child, bus_generic_print_child),
284	DEVMETHOD(bus_get_resource_list, cpu_get_rlist),
285	DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource),
286	DEVMETHOD(bus_set_resource, bus_generic_rl_set_resource),
287	DEVMETHOD(bus_alloc_resource, bus_generic_rl_alloc_resource),
288	DEVMETHOD(bus_release_resource, bus_generic_rl_release_resource),
289	DEVMETHOD(bus_driver_added, bus_generic_driver_added),
290	DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
291	DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
292	DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
293	DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
294
295	{ 0, 0 }
296	};
297
298	static driver_t cpu_driver = {
299	"cpu",
300	cpu_methods,
301	1, /* no softc */
302	};
303	static devclass_t cpu_devclass;
304	DRIVER_MODULE(cpu, legacy, cpu_driver, cpu_devclass, 0, 0);
305
306	static void
307	cpu_identify(driver_t *driver, device_t parent)
308	{
309	device_t child;
310	int i;
311
312	/*
313	* Attach a cpuX device for each CPU. We use an order of 150
314	* so that these devices are attached after the Host-PCI
315	* bridges (which are added at order 100).
316	*/
317	for (i = 0; i <= mp_maxid; i++)
318	if (!CPU_ABSENT(i)) {
319	child = BUS_ADD_CHILD(parent, 150, "cpu", i);
320	if (child == NULL)
321	panic("legacy_attach cpu");
322	}
323	}
324
325	static device_t
326	cpu_add_child(device_t bus, int order, const char *name, int unit)
327	{
328	struct cpu_device *cd;
329	device_t child;
330	struct pcpu *pc;
331
332	if ((cd = kmalloc(sizeof(*cd), M_DEVBUF, M_NOWAIT \| M_ZERO)) == NULL)
333	return (NULL);
334
335	resource_list_init(&cd->cd_rl);
336	pc = pcpu_find(device_get_unit(bus));
337	cd->cd_pcpu = pc;
338
339	child = device_add_child_ordered(bus, order, name, unit);
340	if (child != NULL) {
341	pc->pc_device = child;
342	device_set_ivars(child, cd);
343	} else
344	kfree(cd, M_DEVBUF);
345	return (child);
346	}
347
348	static struct resource_list *
349	cpu_get_rlist(device_t dev, device_t child)
350	{
351	struct cpu_device *cpdev;
352
353	cpdev = device_get_ivars(child);
354	return (&cpdev->cd_rl);
355	}
356
357	static int
358	cpu_read_ivar(device_t dev, device_t child, int index, uintptr_t *result)
359	{
360	struct cpu_device *cpdev;
361
362	if (index != CPU_IVAR_PCPU)
363	return (ENOENT);
364	cpdev = device_get_ivars(child);
365	*result = (uintptr_t)cpdev->cd_pcpu;
366	return (0);
367	}
368	#endif