[dragonfly.git] / sys / platform / pc32 / acpica5 / acpi_madt.c

/*
 * Copyright (c) 2009 The DragonFly Project.  All rights reserved.
 * 
 * This code is derived from software contributed to The DragonFly Project
 * by Sepherosa Ziehau <sepherosa@gmail.com>
 * 
 * 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.
 * 3. Neither the name of The DragonFly Project nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific, prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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
 * COPYRIGHT HOLDERS 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.
 */

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

#include <machine/pmap.h>
#include <machine/smp.h>
#include <machine/md_var.h>
#include <machine/specialreg.h>
#include <machine_base/apic/lapic.h>
#include <machine_base/apic/ioapic.h>

#include "acpi_sdt.h"
#include "acpi_sdt_var.h"

#define MADT_VPRINTF(fmt, arg...) \
do { \
	if (bootverbose) \
		kprintf("ACPI MADT: " fmt , ##arg); \
} while (0)

/* Multiple APIC Description Table */
struct acpi_madt {
	struct acpi_sdth	madt_hdr;
	uint32_t		madt_lapic_addr;
	uint32_t		madt_flags;
	uint8_t			madt_ents[1];
} __packed;

/* Common parts of MADT APIC structure */
struct acpi_madt_ent {
	uint8_t			me_type;	/* MADT_ENT_ */
	uint8_t			me_len;
} __packed;

#define MADT_ENT_LAPIC		0
#define MADT_ENT_IOAPIC		1
#define MADT_ENT_INTSRC		2
#define MADT_ENT_LAPIC_ADDR	5

/* MADT Processor Local APIC */
struct acpi_madt_lapic {
	struct acpi_madt_ent	ml_hdr;
	uint8_t			ml_cpu_id;
	uint8_t			ml_apic_id;
	uint32_t		ml_flags;	/* MADT_LAPIC_ */
} __packed;

#define MADT_LAPIC_ENABLED	0x1

/* MADT I/O APIC */
struct acpi_madt_ioapic {
	struct acpi_madt_ent	mio_hdr;
	uint8_t			mio_apic_id;
	uint8_t			mio_reserved;
	uint32_t		mio_addr;
	uint32_t		mio_gsi_base;
} __packed;

/* MADT Interrupt Source Override */
struct acpi_madt_intsrc {
	struct acpi_madt_ent	mint_hdr;
	uint8_t			mint_bus;	/* MADT_INT_BUS_ */
	uint8_t			mint_src;
	uint32_t		mint_gsi;
	uint16_t		mint_flags;	/* MADT_INT_ */
} __packed;

#define MADT_INT_BUS_ISA	0

#define MADT_INT_POLA_MASK	0x3
#define MADT_INT_POLA_SHIFT	0
#define MADT_INT_POLA_CONFORM	0
#define MADT_INT_POLA_HIGH	1
#define MADT_INT_POLA_RSVD	2
#define MADT_INT_POLA_LOW	3
#define MADT_INT_TRIG_MASK	0xc
#define MADT_INT_TRIG_SHIFT	2
#define MADT_INT_TRIG_CONFORM	0
#define MADT_INT_TRIG_EDGE	1
#define MADT_INT_TRIG_RSVD	2
#define MADT_INT_TRIG_LEVEL	3

/* MADT Local APIC Address Override */
struct acpi_madt_lapic_addr {
	struct acpi_madt_ent	mla_hdr;
	uint16_t		mla_reserved;
	uint64_t		mla_lapic_addr;
} __packed;

typedef int			(*madt_iter_t)(void *,
				    const struct acpi_madt_ent *);

static int			madt_check(vm_paddr_t);
static int			madt_iterate_entries(struct acpi_madt *,
				    madt_iter_t, void *);

static vm_offset_t		madt_lapic_pass1(void);
static int			madt_lapic_pass2(int);

static void			madt_lapic_enumerate(struct lapic_enumerator *);
static int			madt_lapic_probe(struct lapic_enumerator *);

static void			madt_ioapic_enumerate(
				    struct ioapic_enumerator *);
static int			madt_ioapic_probe(struct ioapic_enumerator *);

static vm_paddr_t		madt_phyaddr;

static void
madt_probe(void)
{
	vm_paddr_t madt_paddr;

	KKASSERT(madt_phyaddr == 0);

	madt_paddr = sdt_search(ACPI_MADT_SIG);
	if (madt_paddr == 0) {
		kprintf("madt_probe: can't locate MADT\n");
		return;
	}

	/* Preliminary checks */
	if (madt_check(madt_paddr)) {
		kprintf("madt_probe: madt_check failed\n");
		return;
	}

	madt_phyaddr = madt_paddr;
}
SYSINIT(madt_probe, SI_BOOT2_PRESMP, SI_ORDER_SECOND, madt_probe, 0);

static int
madt_check(vm_paddr_t madt_paddr)
{
	struct acpi_madt *madt;
	int error = 0;

	KKASSERT(madt_paddr != 0);

	madt = sdt_sdth_map(madt_paddr);
	KKASSERT(madt != NULL);

	/*
	 * MADT in ACPI specification 1.0 - 4.0
	 */
	if (madt->madt_hdr.sdth_rev < 1 || madt->madt_hdr.sdth_rev > 3) {
		kprintf("madt_check: unsupported MADT revision %d\n",
			madt->madt_hdr.sdth_rev);
		error = EOPNOTSUPP;
		goto back;
	}

	if (madt->madt_hdr.sdth_len <
	    sizeof(*madt) - sizeof(madt->madt_ents)) {
		kprintf("madt_check: invalid MADT length %u\n",
			madt->madt_hdr.sdth_len);
		error = EINVAL;
		goto back;
	}
back:
	sdt_sdth_unmap(&madt->madt_hdr);
	return error;
}

static int
madt_iterate_entries(struct acpi_madt *madt, madt_iter_t func, void *arg)
{
	int size, cur, error;

	size = madt->madt_hdr.sdth_len -
	       (sizeof(*madt) - sizeof(madt->madt_ents));
	cur = 0;
	error = 0;

	while (size - cur > sizeof(struct acpi_madt_ent)) {
		const struct acpi_madt_ent *ent;

		ent = (const struct acpi_madt_ent *)&madt->madt_ents[cur];
		if (ent->me_len < sizeof(*ent)) {
			kprintf("madt_iterate_entries: invalid MADT "
				"entry len %d\n", ent->me_len);
			error = EINVAL;
			break;
		}
		if (ent->me_len > (size - cur)) {
			kprintf("madt_iterate_entries: invalid MADT "
				"entry len %d, > table length\n", ent->me_len);
			error = EINVAL;
			break;
		}

		cur += ent->me_len;

		/*
		 * Only Local APIC, I/O APIC and Interrupt Source Override
		 * are defined in ACPI specification 1.0 - 4.0
		 */
		switch (ent->me_type) {
		case MADT_ENT_LAPIC:
			if (ent->me_len < sizeof(struct acpi_madt_lapic)) {
				kprintf("madt_iterate_entries: invalid MADT "
					"lapic entry len %d\n", ent->me_len);
				error = EINVAL;
			}
			break;

		case MADT_ENT_IOAPIC:
			if (ent->me_len < sizeof(struct acpi_madt_ioapic)) {
				kprintf("madt_iterate_entries: invalid MADT "
					"ioapic entry len %d\n", ent->me_len);
				error = EINVAL;
			}
			break;

		case MADT_ENT_INTSRC:
			if (ent->me_len < sizeof(struct acpi_madt_intsrc)) {
				kprintf("madt_iterate_entries: invalid MADT "
					"intsrc entry len %d\n",
					ent->me_len);
				error = EINVAL;
			}
			break;
		}
		if (error)
			break;

		error = func(arg, ent);
		if (error)
			break;
	}
	return error;
}

static int
madt_lapic_pass1_callback(void *xarg, const struct acpi_madt_ent *ent)
{
	const struct acpi_madt_lapic_addr *lapic_addr_ent;
	uint64_t *addr64 = xarg;

	if (ent->me_type != MADT_ENT_LAPIC_ADDR)
		return 0;
	if (ent->me_len < sizeof(*lapic_addr_ent)) {
		kprintf("madt_lapic_pass1: "
			"invalid LAPIC address override length\n");
		return 0;
	}
	lapic_addr_ent = (const struct acpi_madt_lapic_addr *)ent;

	*addr64 = lapic_addr_ent->mla_lapic_addr;
	return 0;
}

static vm_offset_t
madt_lapic_pass1(void)
{
	struct acpi_madt *madt;
	vm_offset_t lapic_addr;
	uint64_t lapic_addr64;
	int error;

	KKASSERT(madt_phyaddr != 0);

	madt = sdt_sdth_map(madt_phyaddr);
	KKASSERT(madt != NULL);

	MADT_VPRINTF("LAPIC address 0x%08x, flags %#x\n",
		     madt->madt_lapic_addr, madt->madt_flags);
	lapic_addr = madt->madt_lapic_addr;

	lapic_addr64 = 0;
	error = madt_iterate_entries(madt, madt_lapic_pass1_callback,
				     &lapic_addr64);
	if (error)
		panic("madt_iterate_entries(pass1) failed\n");

	if (lapic_addr64 != 0) {
		kprintf("ACPI MADT: warning 64bits lapic address 0x%llx\n",
			lapic_addr64);
		/* XXX vm_offset_t is 32bits on i386 */
		lapic_addr = lapic_addr64;
	}

	sdt_sdth_unmap(&madt->madt_hdr);

	return lapic_addr;
}

struct madt_lapic_pass2_cbarg {
	int	cpu;
	int	bsp_found;
	int	bsp_apic_id;
};

static int
madt_lapic_pass2_callback(void *xarg, const struct acpi_madt_ent *ent)
{
	const struct acpi_madt_lapic *lapic_ent;
	struct madt_lapic_pass2_cbarg *arg = xarg;

	if (ent->me_type != MADT_ENT_LAPIC)
		return 0;

	lapic_ent = (const struct acpi_madt_lapic *)ent;
	if (lapic_ent->ml_flags & MADT_LAPIC_ENABLED) {
		MADT_VPRINTF("cpu id %d, apic id %d\n",
			     lapic_ent->ml_cpu_id, lapic_ent->ml_apic_id);
		if (lapic_ent->ml_apic_id == arg->bsp_apic_id) {
			lapic_set_cpuid(0, lapic_ent->ml_apic_id);
			arg->bsp_found = 1;
		} else {
			lapic_set_cpuid(arg->cpu, lapic_ent->ml_apic_id);
			arg->cpu++;
		}
	}
	return 0;
}

static int
madt_lapic_pass2(int bsp_apic_id)
{
	struct acpi_madt *madt;
	struct madt_lapic_pass2_cbarg arg;
	int error;

	MADT_VPRINTF("BSP apic id %d\n", bsp_apic_id);

	KKASSERT(madt_phyaddr != 0);

	madt = sdt_sdth_map(madt_phyaddr);
	KKASSERT(madt != NULL);

	bzero(&arg, sizeof(arg));
	arg.cpu = 1;
	arg.bsp_apic_id = bsp_apic_id;

	error = madt_iterate_entries(madt, madt_lapic_pass2_callback, &arg);
	if (error)
		panic("madt_iterate_entries(pass2) failed\n");

	KKASSERT(arg.bsp_found);
	KKASSERT(arg.cpu > 1);
	mp_naps = arg.cpu - 1; /* exclude BSP */

	sdt_sdth_unmap(&madt->madt_hdr);

	return 0;
}

struct madt_lapic_probe_cbarg {
	int		cpu_count;
	vm_offset_t	lapic_addr;
};

static int
madt_lapic_probe_callback(void *xarg, const struct acpi_madt_ent *ent)
{
	struct madt_lapic_probe_cbarg *arg = xarg;

	if (ent->me_type == MADT_ENT_LAPIC) {
		const struct acpi_madt_lapic *lapic_ent;

		lapic_ent = (const struct acpi_madt_lapic *)ent;
		if (lapic_ent->ml_flags & MADT_LAPIC_ENABLED)
			arg->cpu_count++;
	} else if (ent->me_type == MADT_ENT_LAPIC_ADDR) {
		const struct acpi_madt_lapic_addr *lapic_addr_ent;

		if (ent->me_len < sizeof(*lapic_addr_ent)) {
			kprintf("madt_lapic_probe: "
				"invalid LAPIC address override length\n");
			return 0;
		}
		lapic_addr_ent = (const struct acpi_madt_lapic_addr *)ent;

		if (lapic_addr_ent->mla_lapic_addr != 0)
			arg->lapic_addr = lapic_addr_ent->mla_lapic_addr;
	}
	return 0;
}

static int
madt_lapic_probe(struct lapic_enumerator *e)
{
	struct madt_lapic_probe_cbarg arg;
	struct acpi_madt *madt;
	int error;

	if (madt_phyaddr == 0)
		return ENXIO;

	madt = sdt_sdth_map(madt_phyaddr);
	KKASSERT(madt != NULL);

	bzero(&arg, sizeof(arg));
	arg.lapic_addr = madt->madt_lapic_addr;

	error = madt_iterate_entries(madt, madt_lapic_probe_callback, &arg);
	if (!error) {
		if (arg.cpu_count <= 1) {
			kprintf("madt_lapic_probe: "
				"less than 2 CPUs is found\n");
			error = EOPNOTSUPP;
		}
		if (arg.lapic_addr == 0) {
			kprintf("madt_lapic_probe: zero LAPIC address\n");
			error = EOPNOTSUPP;
		}
	}

	sdt_sdth_unmap(&madt->madt_hdr);
	return error;
}

static void
madt_lapic_enumerate(struct lapic_enumerator *e)
{
	vm_offset_t lapic_addr;
	int bsp_apic_id;

	KKASSERT(madt_phyaddr != 0);

	lapic_addr = madt_lapic_pass1();
	if (lapic_addr == 0)
		panic("madt_lapic_enumerate: no local apic\n");

	lapic_map(lapic_addr);

	bsp_apic_id = APIC_ID(lapic->id);
	if (madt_lapic_pass2(bsp_apic_id))
		panic("madt_lapic_enumerate: madt_lapic_pass2 failed\n");
}

static struct lapic_enumerator	madt_lapic_enumerator = {
	.lapic_prio = LAPIC_ENUM_PRIO_MADT,
	.lapic_probe = madt_lapic_probe,
	.lapic_enumerate = madt_lapic_enumerate
};

static void
madt_lapic_enum_register(void)
{
	int prio;

	prio = LAPIC_ENUM_PRIO_MADT;
	kgetenv_int("hw.madt_lapic_prio", &prio);
	madt_lapic_enumerator.lapic_prio = prio;

	lapic_enumerator_register(&madt_lapic_enumerator);
}
SYSINIT(madt_lapic, SI_BOOT2_PRESMP, SI_ORDER_ANY, madt_lapic_enum_register, 0);

struct madt_ioapic_probe_cbarg {
	int	ioapic_cnt;
	int	gsi_base0;
};

static int
madt_ioapic_probe_callback(void *xarg, const struct acpi_madt_ent *ent)
{
	struct madt_ioapic_probe_cbarg *arg = xarg;

	if (ent->me_type == MADT_ENT_INTSRC) {
		const struct acpi_madt_intsrc *intsrc_ent;
		int trig, pola;

		intsrc_ent = (const struct acpi_madt_intsrc *)ent;

		/* XXX magic number */
		if (intsrc_ent->mint_src >= 16) {
			kprintf("madt_ioapic_probe: invalid intsrc irq (%d)\n",
				intsrc_ent->mint_src);
			return EINVAL;
		}

		if (intsrc_ent->mint_bus != MADT_INT_BUS_ISA) {
			kprintf("ACPI MADT: warning intsrc irq %d "
				"bus is not ISA (%d)\n",
				intsrc_ent->mint_src, intsrc_ent->mint_bus);
		}

		trig = (intsrc_ent->mint_flags & MADT_INT_TRIG_MASK) >>
		       MADT_INT_TRIG_SHIFT;
		if (trig == MADT_INT_TRIG_RSVD) {
			kprintf("ACPI MADT: warning invalid intsrc irq %d "
				"trig (%d)\n", intsrc_ent->mint_src, trig);
		}

		pola = (intsrc_ent->mint_flags & MADT_INT_POLA_MASK) >>
		       MADT_INT_POLA_SHIFT;
		if (pola == MADT_INT_POLA_RSVD) {
			kprintf("ACPI MADT: warning invalid intsrc irq %d "
				"pola (%d)\n", intsrc_ent->mint_src, pola);
		}
	} else if (ent->me_type == MADT_ENT_IOAPIC) {
		const struct acpi_madt_ioapic *ioapic_ent;

		ioapic_ent = (const struct acpi_madt_ioapic *)ent;
		if (ioapic_ent->mio_addr == 0) {
			kprintf("madt_ioapic_probe: zero IOAPIC address\n");
			return EINVAL;
		}

		arg->ioapic_cnt++;
		if (ioapic_ent->mio_gsi_base == 0)
			arg->gsi_base0 = 1;
	}
	return 0;
}

static int
madt_ioapic_probe(struct ioapic_enumerator *e)
{
	struct madt_ioapic_probe_cbarg arg;
	struct acpi_madt *madt;
	int error;

	if (madt_phyaddr == 0)
		return ENXIO;

	madt = sdt_sdth_map(madt_phyaddr);
	KKASSERT(madt != NULL);

	bzero(&arg, sizeof(arg));

	error = madt_iterate_entries(madt, madt_ioapic_probe_callback, &arg);
	if (!error) {
		if (arg.ioapic_cnt == 0) {
			kprintf("madt_ioapic_probe: no IOAPIC\n");
			error = ENXIO;
		}
		if (!arg.gsi_base0) {
			kprintf("madt_ioapic_probe: no GSI base 0\n");
			error = EINVAL;
		}
	}

	sdt_sdth_unmap(&madt->madt_hdr);
	return error;
}

static int
madt_ioapic_enum_callback(void *xarg, const struct acpi_madt_ent *ent)
{
	if (ent->me_type == MADT_ENT_INTSRC) {
		const struct acpi_madt_intsrc *intsrc_ent;
		enum intr_trigger trig;
		enum intr_polarity pola;
		int ent_trig;

		intsrc_ent = (const struct acpi_madt_intsrc *)ent;

		KKASSERT(intsrc_ent->mint_src < 16);
		if (intsrc_ent->mint_bus != MADT_INT_BUS_ISA)
			return 0;

		ent_trig = (intsrc_ent->mint_flags & MADT_INT_TRIG_MASK) >>
			   MADT_INT_TRIG_SHIFT;
		if (ent_trig == MADT_INT_TRIG_RSVD) {
			return 0;
#ifdef notyet
		} else if (ent_trig == MADT_INT_TRIG_LEVEL) {
			trig = INTR_TRIGGER_LEVEL;
			pola = INTR_POLARITY_LOW;
#endif
		} else {
			trig = INTR_TRIGGER_EDGE;
			pola = INTR_POLARITY_HIGH;
		}

		if (intsrc_ent->mint_src == intsrc_ent->mint_gsi &&
		    trig == INTR_TRIGGER_EDGE) {
			/* Nothing changed */
			return 0;
		}

		MADT_VPRINTF("INTSRC irq %d -> gsi %u %s/%s\n",
			     intsrc_ent->mint_src, intsrc_ent->mint_gsi,
			     intr_str_trigger(trig), intr_str_polarity(pola));
		ioapic_intsrc(intsrc_ent->mint_src, intsrc_ent->mint_gsi,
			      trig, pola);
	} else if (ent->me_type == MADT_ENT_IOAPIC) {
		const struct acpi_madt_ioapic *ioapic_ent;
		uint32_t ver;
		void *addr;
		int npin;

		ioapic_ent = (const struct acpi_madt_ioapic *)ent;
		MADT_VPRINTF("IOAPIC addr 0x%08x, apic id %d, gsi base %u\n",
			     ioapic_ent->mio_addr, ioapic_ent->mio_apic_id,
			     ioapic_ent->mio_gsi_base);

		addr = ioapic_map(ioapic_ent->mio_addr);

		ver = ioapic_read(addr, IOAPIC_VER);
		npin = ((ver & IOART_VER_MAXREDIR) >> MAXREDIRSHIFT) + 1;

		ioapic_add(addr, ioapic_ent->mio_gsi_base, npin);
	}
	return 0;
}

static void
madt_ioapic_enumerate(struct ioapic_enumerator *e)
{
	struct acpi_madt *madt;
	int error;

	KKASSERT(madt_phyaddr != 0);

	madt = sdt_sdth_map(madt_phyaddr);
	KKASSERT(madt != NULL);

	error = madt_iterate_entries(madt, madt_ioapic_enum_callback, NULL);
	if (error)
		panic("madt_ioapic_enumerate failed\n");

	sdt_sdth_unmap(&madt->madt_hdr);
}

static struct ioapic_enumerator	madt_ioapic_enumerator = {
	.ioapic_prio = IOAPIC_ENUM_PRIO_MADT,
	.ioapic_probe = madt_ioapic_probe,
	.ioapic_enumerate = madt_ioapic_enumerate
};

static void
madt_ioapic_enum_register(void)
{
	int prio;

	prio = IOAPIC_ENUM_PRIO_MADT;
	kgetenv_int("hw.madt_ioapic_prio", &prio);
	madt_ioapic_enumerator.ioapic_prio = prio;

	ioapic_enumerator_register(&madt_ioapic_enumerator);
}
SYSINIT(madt_ioapic, SI_BOOT2_PRESMP, SI_ORDER_ANY,
	madt_ioapic_enum_register, 0);
Commit	Line	Data
85fd9f87 SZ	1	/*
	2	* Copyright (c) 2009 The DragonFly Project. All rights reserved.
	3	*
	4	* This code is derived from software contributed to The DragonFly Project
	5	* by Sepherosa Ziehau <sepherosa@gmail.com>
	6	*
	7	* Redistribution and use in source and binary forms, with or without
	8	* modification, are permitted provided that the following conditions
	9	* are met:
	10	*
	11	* 1. Redistributions of source code must retain the above copyright
	12	* notice, this list of conditions and the following disclaimer.
	13	* 2. Redistributions in binary form must reproduce the above copyright
	14	* notice, this list of conditions and the following disclaimer in
	15	* the documentation and/or other materials provided with the
	16	* distribution.
	17	* 3. Neither the name of The DragonFly Project nor the names of its
	18	* contributors may be used to endorse or promote products derived
	19	* from this software without specific, prior written permission.
	20	*
	21	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
	22	* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
	23	* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
	24	* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
	25	* COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
	26	* INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
	27	* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
	28	* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
	29	* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
	30	* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
	31	* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	32	* SUCH DAMAGE.
	33	*/
	34
	35	#include <sys/param.h>
ae80be10	36	#include <sys/bus.h>
281d9482	37	#include <sys/kernel.h>
85fd9f87 SZ	38	#include <sys/systm.h>
	39
	40	#include <machine/pmap.h>
	41	#include <machine/smp.h>
cda58cde SZ	42	#include <machine/md_var.h>
cda58cde SZ	43	#include <machine/specialreg.h>
3340ac41	44	#include <machine_base/apic/lapic.h>
cb7d6921	45	#include <machine_base/apic/ioapic.h>
85fd9f87	46
d6c62a5d SZ	47	#include "acpi_sdt.h"
	48	#include "acpi_sdt_var.h"
	49
e907d51d SZ	50	#define MADT_VPRINTF(fmt, arg...) \
	51	do { \
	52	if (bootverbose) \
	53	kprintf("ACPI MADT: " fmt , ##arg); \
	54	} while (0)
	55
85fd9f87 SZ	56	/* Multiple APIC Description Table */
	57	struct acpi_madt {
	58	struct acpi_sdth madt_hdr;
	59	uint32_t madt_lapic_addr;
	60	uint32_t madt_flags;
	61	uint8_t madt_ents[1];
	62	} __packed;
	63
	64	/* Common parts of MADT APIC structure */
	65	struct acpi_madt_ent {
	66	uint8_t me_type; /* MADT_ENT_ */
	67	uint8_t me_len;
	68	} __packed;
	69
	70	#define MADT_ENT_LAPIC 0
030832e4	71	#define MADT_ENT_IOAPIC 1
65b2387f	72	#define MADT_ENT_INTSRC 2
e25b100a	73	#define MADT_ENT_LAPIC_ADDR 5
85fd9f87 SZ	74
	75	/* MADT Processor Local APIC */
	76	struct acpi_madt_lapic {
	77	struct acpi_madt_ent ml_hdr;
	78	uint8_t ml_cpu_id;
	79	uint8_t ml_apic_id;
	80	uint32_t ml_flags; /* MADT_LAPIC_ */
	81	} __packed;
	82
	83	#define MADT_LAPIC_ENABLED 0x1
	84
030832e4 SZ	85	/* MADT I/O APIC */
	86	struct acpi_madt_ioapic {
	87	struct acpi_madt_ent mio_hdr;
	88	uint8_t mio_apic_id;
	89	uint8_t mio_reserved;
	90	uint32_t mio_addr;
	91	uint32_t mio_gsi_base;
	92	} __packed;
	93
2bbbec42	94	/* MADT Interrupt Source Override */
922e4bcb SZ	95	struct acpi_madt_intsrc {
922e4bcb SZ	96	struct acpi_madt_ent mint_hdr;
65b2387f	97	uint8_t mint_bus; /* MADT_INT_BUS_ */
922e4bcb SZ	98	uint8_t mint_src;
	99	uint32_t mint_gsi;
	100	uint16_t mint_flags; /* MADT_INT_ */
2bbbec42 SZ	101	} __packed;
2bbbec42 SZ	102
65b2387f SZ	103	#define MADT_INT_BUS_ISA 0
65b2387f SZ	104
922e4bcb SZ	105	#define MADT_INT_POLA_MASK 0x3
	106	#define MADT_INT_POLA_SHIFT 0
	107	#define MADT_INT_POLA_CONFORM 0
	108	#define MADT_INT_POLA_HIGH 1
	109	#define MADT_INT_POLA_RSVD 2
	110	#define MADT_INT_POLA_LOW 3
	111	#define MADT_INT_TRIG_MASK 0xc
	112	#define MADT_INT_TRIG_SHIFT 2
	113	#define MADT_INT_TRIG_CONFORM 0
	114	#define MADT_INT_TRIG_EDGE 1
	115	#define MADT_INT_TRIG_RSVD 2
	116	#define MADT_INT_TRIG_LEVEL 3
2bbbec42	117
e25b100a SZ	118	/* MADT Local APIC Address Override */
	119	struct acpi_madt_lapic_addr {
	120	struct acpi_madt_ent mla_hdr;
	121	uint16_t mla_reserved;
	122	uint64_t mla_lapic_addr;
	123	} __packed;
	124
030832e4 SZ	125	typedef int (madt_iter_t)(void ,
030832e4 SZ	126	const struct acpi_madt_ent *);
85fd9f87	127
223bf214	128	static int madt_check(vm_paddr_t);
030832e4 SZ	129	static int madt_iterate_entries(struct acpi_madt *,
030832e4 SZ	130	madt_iter_t, void *);
85fd9f87	131
27b59776 SZ	132	static vm_offset_t madt_lapic_pass1(void);
27b59776 SZ	133	static int madt_lapic_pass2(int);
281d9482 SZ	134
	135	static void madt_lapic_enumerate(struct lapic_enumerator *);
	136	static int madt_lapic_probe(struct lapic_enumerator *);
	137
65b2387f SZ	138	static void madt_ioapic_enumerate(
	139	struct ioapic_enumerator *);
	140	static int madt_ioapic_probe(struct ioapic_enumerator *);
	141
86120698 SZ	142	static vm_paddr_t madt_phyaddr;
	143
	144	static void
85fd9f87 SZ	145	madt_probe(void)
85fd9f87 SZ	146	{
d6c62a5d	147	vm_paddr_t madt_paddr;
85fd9f87	148
86120698 SZ	149	KKASSERT(madt_phyaddr == 0);
86120698 SZ	150
d6c62a5d	151	madt_paddr = sdt_search(ACPI_MADT_SIG);
85fd9f87 SZ	152	if (madt_paddr == 0) {
85fd9f87 SZ	153	kprintf("madt_probe: can't locate MADT\n");
86120698	154	return;
85fd9f87	155	}
223bf214 SZ	156
223bf214 SZ	157	/* Preliminary checks */
86120698 SZ	158	if (madt_check(madt_paddr)) {
	159	kprintf("madt_probe: madt_check failed\n");
	160	return;
	161	}
	162
	163	madt_phyaddr = madt_paddr;
85fd9f87	164	}
d6c62a5d	165	SYSINIT(madt_probe, SI_BOOT2_PRESMP, SI_ORDER_SECOND, madt_probe, 0);
85fd9f87	166
e25b100a	167	static int
27b59776 SZ	168	madt_check(vm_paddr_t madt_paddr)
	169	{
	170	struct acpi_madt *madt;
	171	int error = 0;
	172
	173	KKASSERT(madt_paddr != 0);
	174
d6c62a5d	175	madt = sdt_sdth_map(madt_paddr);
27b59776 SZ	176	KKASSERT(madt != NULL);
27b59776 SZ	177
7d460393 SZ	178	/*
	179	* MADT in ACPI specification 1.0 - 4.0
	180	*/
	181	if (madt->madt_hdr.sdth_rev < 1 \|\| madt->madt_hdr.sdth_rev > 3) {
27b59776 SZ	182	kprintf("madt_check: unsupported MADT revision %d\n",
	183	madt->madt_hdr.sdth_rev);
	184	error = EOPNOTSUPP;
	185	goto back;
	186	}
	187
	188	if (madt->madt_hdr.sdth_len <
	189	sizeof(*madt) - sizeof(madt->madt_ents)) {
	190	kprintf("madt_check: invalid MADT length %u\n",
	191	madt->madt_hdr.sdth_len);
	192	error = EINVAL;
	193	goto back;
	194	}
	195	back:
d6c62a5d	196	sdt_sdth_unmap(&madt->madt_hdr);
27b59776 SZ	197	return error;
	198	}
	199
	200	static int
	201	madt_iterate_entries(struct acpi_madt madt, madt_iter_t func, void arg)
	202	{
	203	int size, cur, error;
	204
	205	size = madt->madt_hdr.sdth_len -
	206	(sizeof(*madt) - sizeof(madt->madt_ents));
	207	cur = 0;
	208	error = 0;
	209
	210	while (size - cur > sizeof(struct acpi_madt_ent)) {
	211	const struct acpi_madt_ent *ent;
	212
	213	ent = (const struct acpi_madt_ent *)&madt->madt_ents[cur];
	214	if (ent->me_len < sizeof(*ent)) {
	215	kprintf("madt_iterate_entries: invalid MADT "
	216	"entry len %d\n", ent->me_len);
	217	error = EINVAL;
	218	break;
	219	}
	220	if (ent->me_len > (size - cur)) {
	221	kprintf("madt_iterate_entries: invalid MADT "
	222	"entry len %d, > table length\n", ent->me_len);
	223	error = EINVAL;
	224	break;
	225	}
	226
	227	cur += ent->me_len;
	228
	229	/*
	230	* Only Local APIC, I/O APIC and Interrupt Source Override
	231	* are defined in ACPI specification 1.0 - 4.0
	232	*/
	233	switch (ent->me_type) {
	234	case MADT_ENT_LAPIC:
	235	if (ent->me_len < sizeof(struct acpi_madt_lapic)) {
	236	kprintf("madt_iterate_entries: invalid MADT "
	237	"lapic entry len %d\n", ent->me_len);
	238	error = EINVAL;
	239	}
	240	break;
	241
	242	case MADT_ENT_IOAPIC:
	243	if (ent->me_len < sizeof(struct acpi_madt_ioapic)) {
	244	kprintf("madt_iterate_entries: invalid MADT "
	245	"ioapic entry len %d\n", ent->me_len);
	246	error = EINVAL;
	247	}
	248	break;
	249
65b2387f	250	case MADT_ENT_INTSRC:
922e4bcb	251	if (ent->me_len < sizeof(struct acpi_madt_intsrc)) {
27b59776	252	kprintf("madt_iterate_entries: invalid MADT "
922e4bcb	253	"intsrc entry len %d\n",
27b59776 SZ	254	ent->me_len);
	255	error = EINVAL;
	256	}
	257	break;
	258	}
	259	if (error)
	260	break;
	261
	262	error = func(arg, ent);
	263	if (error)
	264	break;
	265	}
	266	return error;
	267	}
	268
	269	static int
	270	madt_lapic_pass1_callback(void xarg, const struct acpi_madt_ent ent)
e25b100a SZ	271	{
	272	const struct acpi_madt_lapic_addr *lapic_addr_ent;
	273	uint64_t *addr64 = xarg;
	274
	275	if (ent->me_type != MADT_ENT_LAPIC_ADDR)
	276	return 0;
	277	if (ent->me_len < sizeof(*lapic_addr_ent)) {
27b59776 SZ	278	kprintf("madt_lapic_pass1: "
27b59776 SZ	279	"invalid LAPIC address override length\n");
e25b100a SZ	280	return 0;
	281	}
	282	lapic_addr_ent = (const struct acpi_madt_lapic_addr *)ent;
	283
	284	*addr64 = lapic_addr_ent->mla_lapic_addr;
	285	return 0;
	286	}
	287
281d9482	288	static vm_offset_t
27b59776	289	madt_lapic_pass1(void)
85fd9f87 SZ	290	{
85fd9f87 SZ	291	struct acpi_madt *madt;
223bf214	292	vm_offset_t lapic_addr;
e25b100a SZ	293	uint64_t lapic_addr64;
e25b100a SZ	294	int error;
85fd9f87	295
86120698	296	KKASSERT(madt_phyaddr != 0);
85fd9f87	297
d6c62a5d	298	madt = sdt_sdth_map(madt_phyaddr);
85fd9f87 SZ	299	KKASSERT(madt != NULL);
85fd9f87 SZ	300
e907d51d SZ	301	MADT_VPRINTF("LAPIC address 0x%08x, flags %#x\n",
e907d51d SZ	302	madt->madt_lapic_addr, madt->madt_flags);
223bf214 SZ	303	lapic_addr = madt->madt_lapic_addr;
223bf214 SZ	304
e25b100a	305	lapic_addr64 = 0;
27b59776 SZ	306	error = madt_iterate_entries(madt, madt_lapic_pass1_callback,
27b59776 SZ	307	&lapic_addr64);
e25b100a SZ	308	if (error)
	309	panic("madt_iterate_entries(pass1) failed\n");
	310
	311	if (lapic_addr64 != 0) {
65b2387f SZ	312	kprintf("ACPI MADT: warning 64bits lapic address 0x%llx\n",
65b2387f SZ	313	lapic_addr64);
e25b100a SZ	314	/* XXX vm_offset_t is 32bits on i386 */
	315	lapic_addr = lapic_addr64;
	316	}
	317
d6c62a5d	318	sdt_sdth_unmap(&madt->madt_hdr);
223bf214 SZ	319
	320	return lapic_addr;
	321	}
	322
27b59776	323	struct madt_lapic_pass2_cbarg {
a11898be SZ	324	int cpu;
	325	int bsp_found;
	326	int bsp_apic_id;
	327	};
	328
	329	static int
27b59776	330	madt_lapic_pass2_callback(void xarg, const struct acpi_madt_ent ent)
a11898be SZ	331	{
a11898be SZ	332	const struct acpi_madt_lapic *lapic_ent;
27b59776	333	struct madt_lapic_pass2_cbarg *arg = xarg;
a11898be SZ	334
	335	if (ent->me_type != MADT_ENT_LAPIC)
	336	return 0;
	337
	338	lapic_ent = (const struct acpi_madt_lapic *)ent;
	339	if (lapic_ent->ml_flags & MADT_LAPIC_ENABLED) {
65b2387f	340	MADT_VPRINTF("cpu id %d, apic id %d\n",
e907d51d	341	lapic_ent->ml_cpu_id, lapic_ent->ml_apic_id);
a11898be	342	if (lapic_ent->ml_apic_id == arg->bsp_apic_id) {
41e2c7e0	343	lapic_set_cpuid(0, lapic_ent->ml_apic_id);
a11898be SZ	344	arg->bsp_found = 1;
a11898be SZ	345	} else {
41e2c7e0	346	lapic_set_cpuid(arg->cpu, lapic_ent->ml_apic_id);
a11898be SZ	347	arg->cpu++;
	348	}
	349	}
	350	return 0;
	351	}
	352
281d9482	353	static int
27b59776	354	madt_lapic_pass2(int bsp_apic_id)
223bf214 SZ	355	{
223bf214 SZ	356	struct acpi_madt *madt;
27b59776	357	struct madt_lapic_pass2_cbarg arg;
a11898be	358	int error;
223bf214	359
e907d51d	360	MADT_VPRINTF("BSP apic id %d\n", bsp_apic_id);
223bf214	361
86120698	362	KKASSERT(madt_phyaddr != 0);
223bf214	363
d6c62a5d	364	madt = sdt_sdth_map(madt_phyaddr);
223bf214	365	KKASSERT(madt != NULL);
85fd9f87	366
a11898be SZ	367	bzero(&arg, sizeof(arg));
	368	arg.cpu = 1;
	369	arg.bsp_apic_id = bsp_apic_id;
85fd9f87	370
27b59776	371	error = madt_iterate_entries(madt, madt_lapic_pass2_callback, &arg);
a11898be SZ	372	if (error)
a11898be SZ	373	panic("madt_iterate_entries(pass2) failed\n");
85fd9f87	374
a11898be SZ	375	KKASSERT(arg.bsp_found);
	376	KKASSERT(arg.cpu > 1);
	377	mp_naps = arg.cpu - 1; /* exclude BSP */
223bf214	378
d6c62a5d	379	sdt_sdth_unmap(&madt->madt_hdr);
a11898be SZ	380
a11898be SZ	381	return 0;
223bf214 SZ	382	}
223bf214 SZ	383
86120698 SZ	384	struct madt_lapic_probe_cbarg {
	385	int cpu_count;
	386	vm_offset_t lapic_addr;
	387	};
	388
	389	static int
	390	madt_lapic_probe_callback(void xarg, const struct acpi_madt_ent ent)
	391	{
	392	struct madt_lapic_probe_cbarg *arg = xarg;
	393
	394	if (ent->me_type == MADT_ENT_LAPIC) {
	395	const struct acpi_madt_lapic *lapic_ent;
	396
	397	lapic_ent = (const struct acpi_madt_lapic *)ent;
	398	if (lapic_ent->ml_flags & MADT_LAPIC_ENABLED)
	399	arg->cpu_count++;
	400	} else if (ent->me_type == MADT_ENT_LAPIC_ADDR) {
	401	const struct acpi_madt_lapic_addr *lapic_addr_ent;
	402
	403	if (ent->me_len < sizeof(*lapic_addr_ent)) {
	404	kprintf("madt_lapic_probe: "
	405	"invalid LAPIC address override length\n");
	406	return 0;
	407	}
	408	lapic_addr_ent = (const struct acpi_madt_lapic_addr *)ent;
	409
	410	if (lapic_addr_ent->mla_lapic_addr != 0)
	411	arg->lapic_addr = lapic_addr_ent->mla_lapic_addr;
	412	}
	413	return 0;
	414	}
	415
281d9482 SZ	416	static int
	417	madt_lapic_probe(struct lapic_enumerator *e)
	418	{
86120698 SZ	419	struct madt_lapic_probe_cbarg arg;
	420	struct acpi_madt *madt;
	421	int error;
281d9482	422
86120698	423	if (madt_phyaddr == 0)
281d9482 SZ	424	return ENXIO;
281d9482 SZ	425
d6c62a5d	426	madt = sdt_sdth_map(madt_phyaddr);
86120698 SZ	427	KKASSERT(madt != NULL);
	428
	429	bzero(&arg, sizeof(arg));
	430	arg.lapic_addr = madt->madt_lapic_addr;
	431
	432	error = madt_iterate_entries(madt, madt_lapic_probe_callback, &arg);
	433	if (!error) {
	434	if (arg.cpu_count <= 1) {
	435	kprintf("madt_lapic_probe: "
	436	"less than 2 CPUs is found\n");
	437	error = EOPNOTSUPP;
	438	}
	439	if (arg.lapic_addr == 0) {
	440	kprintf("madt_lapic_probe: zero LAPIC address\n");
	441	error = EOPNOTSUPP;
	442	}
	443	}
	444
d6c62a5d	445	sdt_sdth_unmap(&madt->madt_hdr);
86120698	446	return error;
281d9482 SZ	447	}
	448
	449	static void
	450	madt_lapic_enumerate(struct lapic_enumerator *e)
	451	{
281d9482 SZ	452	vm_offset_t lapic_addr;
	453	int bsp_apic_id;
	454
86120698	455	KKASSERT(madt_phyaddr != 0);
281d9482	456
27b59776	457	lapic_addr = madt_lapic_pass1();
281d9482	458	if (lapic_addr == 0)
86120698	459	panic("madt_lapic_enumerate: no local apic\n");
281d9482	460
84cc808b	461	lapic_map(lapic_addr);
733c107f	462
cb7d6921	463	bsp_apic_id = APIC_ID(lapic->id);
27b59776 SZ	464	if (madt_lapic_pass2(bsp_apic_id))
27b59776 SZ	465	panic("madt_lapic_enumerate: madt_lapic_pass2 failed\n");
281d9482 SZ	466	}
281d9482 SZ	467
86120698 SZ	468	static struct lapic_enumerator madt_lapic_enumerator = {
	469	.lapic_prio = LAPIC_ENUM_PRIO_MADT,
	470	.lapic_probe = madt_lapic_probe,
	471	.lapic_enumerate = madt_lapic_enumerate
281d9482 SZ	472	};
	473
	474	static void
27b59776	475	madt_lapic_enum_register(void)
281d9482 SZ	476	{
	477	int prio;
	478
	479	prio = LAPIC_ENUM_PRIO_MADT;
	480	kgetenv_int("hw.madt_lapic_prio", &prio);
86120698	481	madt_lapic_enumerator.lapic_prio = prio;
281d9482	482
86120698	483	lapic_enumerator_register(&madt_lapic_enumerator);
281d9482	484	}
27b59776	485	SYSINIT(madt_lapic, SI_BOOT2_PRESMP, SI_ORDER_ANY, madt_lapic_enum_register, 0);
65b2387f SZ	486
	487	struct madt_ioapic_probe_cbarg {
	488	int ioapic_cnt;
	489	int gsi_base0;
	490	};
	491
	492	static int
	493	madt_ioapic_probe_callback(void xarg, const struct acpi_madt_ent ent)
	494	{
	495	struct madt_ioapic_probe_cbarg *arg = xarg;
	496
	497	if (ent->me_type == MADT_ENT_INTSRC) {
	498	const struct acpi_madt_intsrc *intsrc_ent;
	499	int trig, pola;
	500
	501	intsrc_ent = (const struct acpi_madt_intsrc *)ent;
	502
1365d5cd SZ	503	/* XXX magic number */
	504	if (intsrc_ent->mint_src >= 16) {
	505	kprintf("madt_ioapic_probe: invalid intsrc irq (%d)\n",
	506	intsrc_ent->mint_src);
	507	return EINVAL;
	508	}
	509
65b2387f	510	if (intsrc_ent->mint_bus != MADT_INT_BUS_ISA) {
1365d5cd SZ	511	kprintf("ACPI MADT: warning intsrc irq %d "
	512	"bus is not ISA (%d)\n",
	513	intsrc_ent->mint_src, intsrc_ent->mint_bus);
65b2387f SZ	514	}
	515
	516	trig = (intsrc_ent->mint_flags & MADT_INT_TRIG_MASK) >>
	517	MADT_INT_TRIG_SHIFT;
ae80be10	518	if (trig == MADT_INT_TRIG_RSVD) {
1365d5cd SZ	519	kprintf("ACPI MADT: warning invalid intsrc irq %d "
1365d5cd SZ	520	"trig (%d)\n", intsrc_ent->mint_src, trig);
65b2387f SZ	521	}
	522
	523	pola = (intsrc_ent->mint_flags & MADT_INT_POLA_MASK) >>
	524	MADT_INT_POLA_SHIFT;
ae80be10	525	if (pola == MADT_INT_POLA_RSVD) {
1365d5cd SZ	526	kprintf("ACPI MADT: warning invalid intsrc irq %d "
1365d5cd SZ	527	"pola (%d)\n", intsrc_ent->mint_src, pola);
65b2387f SZ	528	}
	529	} else if (ent->me_type == MADT_ENT_IOAPIC) {
	530	const struct acpi_madt_ioapic *ioapic_ent;
	531
	532	ioapic_ent = (const struct acpi_madt_ioapic *)ent;
	533	if (ioapic_ent->mio_addr == 0) {
	534	kprintf("madt_ioapic_probe: zero IOAPIC address\n");
	535	return EINVAL;
	536	}
	537
	538	arg->ioapic_cnt++;
	539	if (ioapic_ent->mio_gsi_base == 0)
	540	arg->gsi_base0 = 1;
	541	}
	542	return 0;
	543	}
	544
	545	static int
	546	madt_ioapic_probe(struct ioapic_enumerator *e)
	547	{
	548	struct madt_ioapic_probe_cbarg arg;
	549	struct acpi_madt *madt;
	550	int error;
	551
	552	if (madt_phyaddr == 0)
	553	return ENXIO;
	554
d6c62a5d	555	madt = sdt_sdth_map(madt_phyaddr);
65b2387f SZ	556	KKASSERT(madt != NULL);
	557
	558	bzero(&arg, sizeof(arg));
	559
	560	error = madt_iterate_entries(madt, madt_ioapic_probe_callback, &arg);
	561	if (!error) {
	562	if (arg.ioapic_cnt == 0) {
	563	kprintf("madt_ioapic_probe: no IOAPIC\n");
	564	error = ENXIO;
	565	}
	566	if (!arg.gsi_base0) {
	567	kprintf("madt_ioapic_probe: no GSI base 0\n");
	568	error = EINVAL;
	569	}
	570	}
	571
d6c62a5d	572	sdt_sdth_unmap(&madt->madt_hdr);
65b2387f SZ	573	return error;
	574	}
	575
	576	static int
	577	madt_ioapic_enum_callback(void xarg, const struct acpi_madt_ent ent)
	578	{
	579	if (ent->me_type == MADT_ENT_INTSRC) {
	580	const struct acpi_madt_intsrc *intsrc_ent;
ae80be10 SZ	581	enum intr_trigger trig;
	582	enum intr_polarity pola;
	583	int ent_trig;
65b2387f SZ	584
65b2387f SZ	585	intsrc_ent = (const struct acpi_madt_intsrc *)ent;
ae80be10 SZ	586
	587	KKASSERT(intsrc_ent->mint_src < 16);
	588	if (intsrc_ent->mint_bus != MADT_INT_BUS_ISA)
	589	return 0;
	590
	591	ent_trig = (intsrc_ent->mint_flags & MADT_INT_TRIG_MASK) >>
	592	MADT_INT_TRIG_SHIFT;
	593	if (ent_trig == MADT_INT_TRIG_RSVD) {
1365d5cd	594	return 0;
ca4177e4	595	#ifdef notyet
ae80be10 SZ	596	} else if (ent_trig == MADT_INT_TRIG_LEVEL) {
	597	trig = INTR_TRIGGER_LEVEL;
	598	pola = INTR_POLARITY_LOW;
ca4177e4	599	#endif
ae80be10 SZ	600	} else {
	601	trig = INTR_TRIGGER_EDGE;
	602	pola = INTR_POLARITY_HIGH;
	603	}
	604
	605	if (intsrc_ent->mint_src == intsrc_ent->mint_gsi &&
	606	trig == INTR_TRIGGER_EDGE) {
	607	/* Nothing changed */
	608	return 0;
	609	}
1365d5cd	610
4ecd5d4d	611	MADT_VPRINTF("INTSRC irq %d -> gsi %u %s/%s\n",
ae80be10	612	intsrc_ent->mint_src, intsrc_ent->mint_gsi,
4ecd5d4d	613	intr_str_trigger(trig), intr_str_polarity(pola));
ae80be10 SZ	614	ioapic_intsrc(intsrc_ent->mint_src, intsrc_ent->mint_gsi,
ae80be10 SZ	615	trig, pola);
65b2387f SZ	616	} else if (ent->me_type == MADT_ENT_IOAPIC) {
65b2387f SZ	617	const struct acpi_madt_ioapic *ioapic_ent;
6ac31e9d SZ	618	uint32_t ver;
	619	void *addr;
	620	int npin;
65b2387f SZ	621
	622	ioapic_ent = (const struct acpi_madt_ioapic *)ent;
	623	MADT_VPRINTF("IOAPIC addr 0x%08x, apic id %d, gsi base %u\n",
	624	ioapic_ent->mio_addr, ioapic_ent->mio_apic_id,
	625	ioapic_ent->mio_gsi_base);
ebf4f417	626
6ac31e9d	627	addr = ioapic_map(ioapic_ent->mio_addr);
ebf4f417	628
6ac31e9d SZ	629	ver = ioapic_read(addr, IOAPIC_VER);
6ac31e9d SZ	630	npin = ((ver & IOART_VER_MAXREDIR) >> MAXREDIRSHIFT) + 1;
ebf4f417	631
6ac31e9d	632	ioapic_add(addr, ioapic_ent->mio_gsi_base, npin);
65b2387f SZ	633	}
	634	return 0;
	635	}
	636
	637	static void
	638	madt_ioapic_enumerate(struct ioapic_enumerator *e)
	639	{
	640	struct acpi_madt *madt;
	641	int error;
	642
	643	KKASSERT(madt_phyaddr != 0);
	644
d6c62a5d	645	madt = sdt_sdth_map(madt_phyaddr);
65b2387f SZ	646	KKASSERT(madt != NULL);
	647
	648	error = madt_iterate_entries(madt, madt_ioapic_enum_callback, NULL);
	649	if (error)
	650	panic("madt_ioapic_enumerate failed\n");
	651
d6c62a5d	652	sdt_sdth_unmap(&madt->madt_hdr);
65b2387f SZ	653	}
	654
	655	static struct ioapic_enumerator madt_ioapic_enumerator = {
	656	.ioapic_prio = IOAPIC_ENUM_PRIO_MADT,
	657	.ioapic_probe = madt_ioapic_probe,
	658	.ioapic_enumerate = madt_ioapic_enumerate
	659	};
	660
	661	static void
	662	madt_ioapic_enum_register(void)
	663	{
	664	int prio;
	665
	666	prio = IOAPIC_ENUM_PRIO_MADT;
	667	kgetenv_int("hw.madt_ioapic_prio", &prio);
	668	madt_ioapic_enumerator.ioapic_prio = prio;
	669
	670	ioapic_enumerator_register(&madt_ioapic_enumerator);
	671	}
	672	SYSINIT(madt_ioapic, SI_BOOT2_PRESMP, SI_ORDER_ANY,
	673	madt_ioapic_enum_register, 0);