[linux-2.6-block.git] / arch / ia64 / kernel / irq_ia64.c

/*
 * linux/arch/ia64/kernel/irq_ia64.c
 *
 * Copyright (C) 1998-2001 Hewlett-Packard Co
 *	Stephane Eranian <eranian@hpl.hp.com>
 *	David Mosberger-Tang <davidm@hpl.hp.com>
 *
 *  6/10/99: Updated to bring in sync with x86 version to facilitate
 *	     support for SMP and different interrupt controllers.
 *
 * 09/15/00 Goutham Rao <goutham.rao@intel.com> Implemented pci_irq_to_vector
 *                      PCI to vector allocation routine.
 * 04/14/2004 Ashok Raj <ashok.raj@intel.com>
 *						Added CPU Hotplug handling for IPF.
 */

#include <linux/module.h>

#include <linux/jiffies.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/ioport.h>
#include <linux/kernel_stat.h>
#include <linux/ptrace.h>
#include <linux/random.h>	/* for rand_initialize_irq() */
#include <linux/signal.h>
#include <linux/smp.h>
#include <linux/threads.h>
#include <linux/bitops.h>
#include <linux/irq.h>
#include <linux/ratelimit.h>

#include <asm/delay.h>
#include <asm/intrinsics.h>
#include <asm/io.h>
#include <asm/hw_irq.h>
#include <asm/machvec.h>
#include <asm/pgtable.h>
#include <asm/system.h>
#include <asm/tlbflush.h>

#ifdef CONFIG_PERFMON
# include <asm/perfmon.h>
#endif

#define IRQ_DEBUG	0

#define IRQ_VECTOR_UNASSIGNED	(0)

#define IRQ_UNUSED		(0)
#define IRQ_USED		(1)
#define IRQ_RSVD		(2)

/* These can be overridden in platform_irq_init */
int ia64_first_device_vector = IA64_DEF_FIRST_DEVICE_VECTOR;
int ia64_last_device_vector = IA64_DEF_LAST_DEVICE_VECTOR;

/* default base addr of IPI table */
void __iomem *ipi_base_addr = ((void __iomem *)
			       (__IA64_UNCACHED_OFFSET | IA64_IPI_DEFAULT_BASE_ADDR));

static cpumask_t vector_allocation_domain(int cpu);

/*
 * Legacy IRQ to IA-64 vector translation table.
 */
__u8 isa_irq_to_vector_map[16] = {
	/* 8259 IRQ translation, first 16 entries */
	0x2f, 0x20, 0x2e, 0x2d, 0x2c, 0x2b, 0x2a, 0x29,
	0x28, 0x27, 0x26, 0x25, 0x24, 0x23, 0x22, 0x21
};
EXPORT_SYMBOL(isa_irq_to_vector_map);

DEFINE_SPINLOCK(vector_lock);

struct irq_cfg irq_cfg[NR_IRQS] __read_mostly = {
	[0 ... NR_IRQS - 1] = {
		.vector = IRQ_VECTOR_UNASSIGNED,
		.domain = CPU_MASK_NONE
	}
};

DEFINE_PER_CPU(int[IA64_NUM_VECTORS], vector_irq) = {
	[0 ... IA64_NUM_VECTORS - 1] = -1
};

static cpumask_t vector_table[IA64_NUM_VECTORS] = {
	[0 ... IA64_NUM_VECTORS - 1] = CPU_MASK_NONE
};

static int irq_status[NR_IRQS] = {
	[0 ... NR_IRQS -1] = IRQ_UNUSED
};

int check_irq_used(int irq)
{
	if (irq_status[irq] == IRQ_USED)
		return 1;

	return -1;
}

static inline int find_unassigned_irq(void)
{
	int irq;

	for (irq = IA64_FIRST_DEVICE_VECTOR; irq < NR_IRQS; irq++)
		if (irq_status[irq] == IRQ_UNUSED)
			return irq;
	return -ENOSPC;
}

static inline int find_unassigned_vector(cpumask_t domain)
{
	cpumask_t mask;
	int pos, vector;

	cpus_and(mask, domain, cpu_online_map);
	if (cpus_empty(mask))
		return -EINVAL;

	for (pos = 0; pos < IA64_NUM_DEVICE_VECTORS; pos++) {
		vector = IA64_FIRST_DEVICE_VECTOR + pos;
		cpus_and(mask, domain, vector_table[vector]);
		if (!cpus_empty(mask))
			continue;
		return vector;
	}
	return -ENOSPC;
}

static int __bind_irq_vector(int irq, int vector, cpumask_t domain)
{
	cpumask_t mask;
	int cpu;
	struct irq_cfg *cfg = &irq_cfg[irq];

	BUG_ON((unsigned)irq >= NR_IRQS);
	BUG_ON((unsigned)vector >= IA64_NUM_VECTORS);

	cpus_and(mask, domain, cpu_online_map);
	if (cpus_empty(mask))
		return -EINVAL;
	if ((cfg->vector == vector) && cpus_equal(cfg->domain, domain))
		return 0;
	if (cfg->vector != IRQ_VECTOR_UNASSIGNED)
		return -EBUSY;
	for_each_cpu_mask(cpu, mask)
		per_cpu(vector_irq, cpu)[vector] = irq;
	cfg->vector = vector;
	cfg->domain = domain;
	irq_status[irq] = IRQ_USED;
	cpus_or(vector_table[vector], vector_table[vector], domain);
	return 0;
}

int bind_irq_vector(int irq, int vector, cpumask_t domain)
{
	unsigned long flags;
	int ret;

	spin_lock_irqsave(&vector_lock, flags);
	ret = __bind_irq_vector(irq, vector, domain);
	spin_unlock_irqrestore(&vector_lock, flags);
	return ret;
}

static void __clear_irq_vector(int irq)
{
	int vector, cpu;
	cpumask_t mask;
	cpumask_t domain;
	struct irq_cfg *cfg = &irq_cfg[irq];

	BUG_ON((unsigned)irq >= NR_IRQS);
	BUG_ON(cfg->vector == IRQ_VECTOR_UNASSIGNED);
	vector = cfg->vector;
	domain = cfg->domain;
	cpus_and(mask, cfg->domain, cpu_online_map);
	for_each_cpu_mask(cpu, mask)
		per_cpu(vector_irq, cpu)[vector] = -1;
	cfg->vector = IRQ_VECTOR_UNASSIGNED;
	cfg->domain = CPU_MASK_NONE;
	irq_status[irq] = IRQ_UNUSED;
	cpus_andnot(vector_table[vector], vector_table[vector], domain);
}

static void clear_irq_vector(int irq)
{
	unsigned long flags;

	spin_lock_irqsave(&vector_lock, flags);
	__clear_irq_vector(irq);
	spin_unlock_irqrestore(&vector_lock, flags);
}

int
ia64_native_assign_irq_vector (int irq)
{
	unsigned long flags;
	int vector, cpu;
	cpumask_t domain = CPU_MASK_NONE;

	vector = -ENOSPC;

	spin_lock_irqsave(&vector_lock, flags);
	for_each_online_cpu(cpu) {
		domain = vector_allocation_domain(cpu);
		vector = find_unassigned_vector(domain);
		if (vector >= 0)
			break;
	}
	if (vector < 0)
		goto out;
	if (irq == AUTO_ASSIGN)
		irq = vector;
	BUG_ON(__bind_irq_vector(irq, vector, domain));
 out:
	spin_unlock_irqrestore(&vector_lock, flags);
	return vector;
}

void
ia64_native_free_irq_vector (int vector)
{
	if (vector < IA64_FIRST_DEVICE_VECTOR ||
	    vector > IA64_LAST_DEVICE_VECTOR)
		return;
	clear_irq_vector(vector);
}

int
reserve_irq_vector (int vector)
{
	if (vector < IA64_FIRST_DEVICE_VECTOR ||
	    vector > IA64_LAST_DEVICE_VECTOR)
		return -EINVAL;
	return !!bind_irq_vector(vector, vector, CPU_MASK_ALL);
}

/*
 * Initialize vector_irq on a new cpu. This function must be called
 * with vector_lock held.
 */
void __setup_vector_irq(int cpu)
{
	int irq, vector;

	/* Clear vector_irq */
	for (vector = 0; vector < IA64_NUM_VECTORS; ++vector)
		per_cpu(vector_irq, cpu)[vector] = -1;
	/* Mark the inuse vectors */
	for (irq = 0; irq < NR_IRQS; ++irq) {
		if (!cpu_isset(cpu, irq_cfg[irq].domain))
			continue;
		vector = irq_to_vector(irq);
		per_cpu(vector_irq, cpu)[vector] = irq;
	}
}

#if defined(CONFIG_SMP) && (defined(CONFIG_IA64_GENERIC) || defined(CONFIG_IA64_DIG))

static enum vector_domain_type {
	VECTOR_DOMAIN_NONE,
	VECTOR_DOMAIN_PERCPU
} vector_domain_type = VECTOR_DOMAIN_NONE;

static cpumask_t vector_allocation_domain(int cpu)
{
	if (vector_domain_type == VECTOR_DOMAIN_PERCPU)
		return cpumask_of_cpu(cpu);
	return CPU_MASK_ALL;
}

static int __irq_prepare_move(int irq, int cpu)
{
	struct irq_cfg *cfg = &irq_cfg[irq];
	int vector;
	cpumask_t domain;

	if (cfg->move_in_progress || cfg->move_cleanup_count)
		return -EBUSY;
	if (cfg->vector == IRQ_VECTOR_UNASSIGNED || !cpu_online(cpu))
		return -EINVAL;
	if (cpu_isset(cpu, cfg->domain))
		return 0;
	domain = vector_allocation_domain(cpu);
	vector = find_unassigned_vector(domain);
	if (vector < 0)
		return -ENOSPC;
	cfg->move_in_progress = 1;
	cfg->old_domain = cfg->domain;
	cfg->vector = IRQ_VECTOR_UNASSIGNED;
	cfg->domain = CPU_MASK_NONE;
	BUG_ON(__bind_irq_vector(irq, vector, domain));
	return 0;
}

int irq_prepare_move(int irq, int cpu)
{
	unsigned long flags;
	int ret;

	spin_lock_irqsave(&vector_lock, flags);
	ret = __irq_prepare_move(irq, cpu);
	spin_unlock_irqrestore(&vector_lock, flags);
	return ret;
}

void irq_complete_move(unsigned irq)
{
	struct irq_cfg *cfg = &irq_cfg[irq];
	cpumask_t cleanup_mask;
	int i;

	if (likely(!cfg->move_in_progress))
		return;

	if (unlikely(cpu_isset(smp_processor_id(), cfg->old_domain)))
		return;

	cpus_and(cleanup_mask, cfg->old_domain, cpu_online_map);
	cfg->move_cleanup_count = cpus_weight(cleanup_mask);
	for_each_cpu_mask(i, cleanup_mask)
		platform_send_ipi(i, IA64_IRQ_MOVE_VECTOR, IA64_IPI_DM_INT, 0);
	cfg->move_in_progress = 0;
}

static irqreturn_t smp_irq_move_cleanup_interrupt(int irq, void *dev_id)
{
	int me = smp_processor_id();
	ia64_vector vector;
	unsigned long flags;

	for (vector = IA64_FIRST_DEVICE_VECTOR;
	     vector < IA64_LAST_DEVICE_VECTOR; vector++) {
		int irq;
		struct irq_desc *desc;
		struct irq_cfg *cfg;
		irq = __get_cpu_var(vector_irq)[vector];
		if (irq < 0)
			continue;

		desc = irq_desc + irq;
		cfg = irq_cfg + irq;
		raw_spin_lock(&desc->lock);
		if (!cfg->move_cleanup_count)
			goto unlock;

		if (!cpu_isset(me, cfg->old_domain))
			goto unlock;

		spin_lock_irqsave(&vector_lock, flags);
		__get_cpu_var(vector_irq)[vector] = -1;
		cpu_clear(me, vector_table[vector]);
		spin_unlock_irqrestore(&vector_lock, flags);
		cfg->move_cleanup_count--;
	unlock:
		raw_spin_unlock(&desc->lock);
	}
	return IRQ_HANDLED;
}

static struct irqaction irq_move_irqaction = {
	.handler =	smp_irq_move_cleanup_interrupt,
	.flags =	IRQF_DISABLED,
	.name =		"irq_move"
};

static int __init parse_vector_domain(char *arg)
{
	if (!arg)
		return -EINVAL;
	if (!strcmp(arg, "percpu")) {
		vector_domain_type = VECTOR_DOMAIN_PERCPU;
		no_int_routing = 1;
	}
	return 0;
}
early_param("vector", parse_vector_domain);
#else
static cpumask_t vector_allocation_domain(int cpu)
{
	return CPU_MASK_ALL;
}
#endif


void destroy_and_reserve_irq(unsigned int irq)
{
	unsigned long flags;

	dynamic_irq_cleanup(irq);

	spin_lock_irqsave(&vector_lock, flags);
	__clear_irq_vector(irq);
	irq_status[irq] = IRQ_RSVD;
	spin_unlock_irqrestore(&vector_lock, flags);
}

/*
 * Dynamic irq allocate and deallocation for MSI
 */
int create_irq(void)
{
	unsigned long flags;
	int irq, vector, cpu;
	cpumask_t domain = CPU_MASK_NONE;

	irq = vector = -ENOSPC;
	spin_lock_irqsave(&vector_lock, flags);
	for_each_online_cpu(cpu) {
		domain = vector_allocation_domain(cpu);
		vector = find_unassigned_vector(domain);
		if (vector >= 0)
			break;
	}
	if (vector < 0)
		goto out;
	irq = find_unassigned_irq();
	if (irq < 0)
		goto out;
	BUG_ON(__bind_irq_vector(irq, vector, domain));
 out:
	spin_unlock_irqrestore(&vector_lock, flags);
	if (irq >= 0)
		dynamic_irq_init(irq);
	return irq;
}

void destroy_irq(unsigned int irq)
{
	dynamic_irq_cleanup(irq);
	clear_irq_vector(irq);
}

#ifdef CONFIG_SMP
#	define IS_RESCHEDULE(vec)	(vec == IA64_IPI_RESCHEDULE)
#	define IS_LOCAL_TLB_FLUSH(vec)	(vec == IA64_IPI_LOCAL_TLB_FLUSH)
#else
#	define IS_RESCHEDULE(vec)	(0)
#	define IS_LOCAL_TLB_FLUSH(vec)	(0)
#endif
/*
 * That's where the IVT branches when we get an external
 * interrupt. This branches to the correct hardware IRQ handler via
 * function ptr.
 */
void
ia64_handle_irq (ia64_vector vector, struct pt_regs *regs)
{
	struct pt_regs *old_regs = set_irq_regs(regs);
	unsigned long saved_tpr;

#if IRQ_DEBUG
	{
		unsigned long bsp, sp;

		/*
		 * Note: if the interrupt happened while executing in
		 * the context switch routine (ia64_switch_to), we may
		 * get a spurious stack overflow here.  This is
		 * because the register and the memory stack are not
		 * switched atomically.
		 */
		bsp = ia64_getreg(_IA64_REG_AR_BSP);
		sp = ia64_getreg(_IA64_REG_SP);

		if ((sp - bsp) < 1024) {
			static DEFINE_RATELIMIT_STATE(ratelimit, 5 * HZ, 5);

			if (__ratelimit(&ratelimit)) {
				printk("ia64_handle_irq: DANGER: less than "
				       "1KB of free stack space!!\n"
				       "(bsp=0x%lx, sp=%lx)\n", bsp, sp);
			}
		}
	}
#endif /* IRQ_DEBUG */

	/*
	 * Always set TPR to limit maximum interrupt nesting depth to
	 * 16 (without this, it would be ~240, which could easily lead
	 * to kernel stack overflows).
	 */
	irq_enter();
	saved_tpr = ia64_getreg(_IA64_REG_CR_TPR);
	ia64_srlz_d();
	while (vector != IA64_SPURIOUS_INT_VECTOR) {
		int irq = local_vector_to_irq(vector);
		struct irq_desc *desc = irq_to_desc(irq);

		if (unlikely(IS_LOCAL_TLB_FLUSH(vector))) {
			smp_local_flush_tlb();
			kstat_incr_irqs_this_cpu(irq, desc);
		} else if (unlikely(IS_RESCHEDULE(vector))) {
			kstat_incr_irqs_this_cpu(irq, desc);
		} else {
			ia64_setreg(_IA64_REG_CR_TPR, vector);
			ia64_srlz_d();

			if (unlikely(irq < 0)) {
				printk(KERN_ERR "%s: Unexpected interrupt "
				       "vector %d on CPU %d is not mapped "
				       "to any IRQ!\n", __func__, vector,
				       smp_processor_id());
			} else
				generic_handle_irq(irq);

			/*
			 * Disable interrupts and send EOI:
			 */
			local_irq_disable();
			ia64_setreg(_IA64_REG_CR_TPR, saved_tpr);
		}
		ia64_eoi();
		vector = ia64_get_ivr();
	}
	/*
	 * This must be done *after* the ia64_eoi().  For example, the keyboard softirq
	 * handler needs to be able to wait for further keyboard interrupts, which can't
	 * come through until ia64_eoi() has been done.
	 */
	irq_exit();
	set_irq_regs(old_regs);
}

#ifdef CONFIG_HOTPLUG_CPU
/*
 * This function emulates a interrupt processing when a cpu is about to be
 * brought down.
 */
void ia64_process_pending_intr(void)
{
	ia64_vector vector;
	unsigned long saved_tpr;
	extern unsigned int vectors_in_migration[NR_IRQS];

	vector = ia64_get_ivr();

	irq_enter();
	saved_tpr = ia64_getreg(_IA64_REG_CR_TPR);
	ia64_srlz_d();

	 /*
	  * Perform normal interrupt style processing
	  */
	while (vector != IA64_SPURIOUS_INT_VECTOR) {
		int irq = local_vector_to_irq(vector);
		struct irq_desc *desc = irq_to_desc(irq);

		if (unlikely(IS_LOCAL_TLB_FLUSH(vector))) {
			smp_local_flush_tlb();
			kstat_incr_irqs_this_cpu(irq, desc);
		} else if (unlikely(IS_RESCHEDULE(vector))) {
			kstat_incr_irqs_this_cpu(irq, desc);
		} else {
			struct pt_regs *old_regs = set_irq_regs(NULL);

			ia64_setreg(_IA64_REG_CR_TPR, vector);
			ia64_srlz_d();

			/*
			 * Now try calling normal ia64_handle_irq as it would have got called
			 * from a real intr handler. Try passing null for pt_regs, hopefully
			 * it will work. I hope it works!.
			 * Probably could shared code.
			 */
			if (unlikely(irq < 0)) {
				printk(KERN_ERR "%s: Unexpected interrupt "
				       "vector %d on CPU %d not being mapped "
				       "to any IRQ!!\n", __func__, vector,
				       smp_processor_id());
			} else {
				vectors_in_migration[irq]=0;
				generic_handle_irq(irq);
			}
			set_irq_regs(old_regs);

			/*
			 * Disable interrupts and send EOI
			 */
			local_irq_disable();
			ia64_setreg(_IA64_REG_CR_TPR, saved_tpr);
		}
		ia64_eoi();
		vector = ia64_get_ivr();
	}
	irq_exit();
}
#endif


#ifdef CONFIG_SMP

static irqreturn_t dummy_handler (int irq, void *dev_id)
{
	BUG();
}

static struct irqaction ipi_irqaction = {
	.handler =	handle_IPI,
	.flags =	IRQF_DISABLED,
	.name =		"IPI"
};

/*
 * KVM uses this interrupt to force a cpu out of guest mode
 */
static struct irqaction resched_irqaction = {
	.handler =	dummy_handler,
	.flags =	IRQF_DISABLED,
	.name =		"resched"
};

static struct irqaction tlb_irqaction = {
	.handler =	dummy_handler,
	.flags =	IRQF_DISABLED,
	.name =		"tlb_flush"
};

#endif

void
ia64_native_register_percpu_irq (ia64_vector vec, struct irqaction *action)
{
	struct irq_desc *desc;
	unsigned int irq;

	irq = vec;
	BUG_ON(bind_irq_vector(irq, vec, CPU_MASK_ALL));
	desc = irq_desc + irq;
	desc->status |= IRQ_PER_CPU;
	desc->chip = &irq_type_ia64_lsapic;
	if (action)
		setup_irq(irq, action);
}

void __init
ia64_native_register_ipi(void)
{
#ifdef CONFIG_SMP
	register_percpu_irq(IA64_IPI_VECTOR, &ipi_irqaction);
	register_percpu_irq(IA64_IPI_RESCHEDULE, &resched_irqaction);
	register_percpu_irq(IA64_IPI_LOCAL_TLB_FLUSH, &tlb_irqaction);
#endif
}

void __init
init_IRQ (void)
{
	ia64_register_ipi();
	register_percpu_irq(IA64_SPURIOUS_INT_VECTOR, NULL);
#ifdef CONFIG_SMP
#if defined(CONFIG_IA64_GENERIC) || defined(CONFIG_IA64_DIG)
	if (vector_domain_type != VECTOR_DOMAIN_NONE)
		register_percpu_irq(IA64_IRQ_MOVE_VECTOR, &irq_move_irqaction);
#endif
#endif
#ifdef CONFIG_PERFMON
	pfm_init_percpu();
#endif
	platform_irq_init();
}

void
ia64_send_ipi (int cpu, int vector, int delivery_mode, int redirect)
{
	void __iomem *ipi_addr;
	unsigned long ipi_data;
	unsigned long phys_cpu_id;

	phys_cpu_id = cpu_physical_id(cpu);

	/*
	 * cpu number is in 8bit ID and 8bit EID
	 */

	ipi_data = (delivery_mode << 8) | (vector & 0xff);
	ipi_addr = ipi_base_addr + ((phys_cpu_id << 4) | ((redirect & 1) << 3));

	writeq(ipi_data, ipi_addr);
}
Commit	Line	Data
1da177e4	1	/*
f30c2269	2	* linux/arch/ia64/kernel/irq_ia64.c
1da177e4 LT	3	*
	4	* Copyright (C) 1998-2001 Hewlett-Packard Co
	5	* Stephane Eranian <eranian@hpl.hp.com>
	6	* David Mosberger-Tang <davidm@hpl.hp.com>
	7	*
	8	* 6/10/99: Updated to bring in sync with x86 version to facilitate
	9	* support for SMP and different interrupt controllers.
	10	*
	11	* 09/15/00 Goutham Rao <goutham.rao@intel.com> Implemented pci_irq_to_vector
	12	* PCI to vector allocation routine.
	13	* 04/14/2004 Ashok Raj <ashok.raj@intel.com>
	14	* Added CPU Hotplug handling for IPF.
	15	*/
	16
1da177e4 LT	17	#include <linux/module.h>
	18
	19	#include <linux/jiffies.h>
	20	#include <linux/errno.h>
	21	#include <linux/init.h>
	22	#include <linux/interrupt.h>
	23	#include <linux/ioport.h>
	24	#include <linux/kernel_stat.h>
1da177e4 LT	25	#include <linux/ptrace.h>
	26	#include <linux/random.h> /* for rand_initialize_irq() */
	27	#include <linux/signal.h>
	28	#include <linux/smp.h>
1da177e4 LT	29	#include <linux/threads.h>
1da177e4 LT	30	#include <linux/bitops.h>
b6cf2583	31	#include <linux/irq.h>
7683a3f9	32	#include <linux/ratelimit.h>
1da177e4 LT	33
	34	#include <asm/delay.h>
	35	#include <asm/intrinsics.h>
	36	#include <asm/io.h>
	37	#include <asm/hw_irq.h>
	38	#include <asm/machvec.h>
	39	#include <asm/pgtable.h>
	40	#include <asm/system.h>
3be44b9c	41	#include <asm/tlbflush.h>
1da177e4 LT	42
	43	#ifdef CONFIG_PERFMON
	44	# include <asm/perfmon.h>
	45	#endif
	46
	47	#define IRQ_DEBUG 0
	48
e1b30a39 YI	49	#define IRQ_VECTOR_UNASSIGNED (0)
	50
	51	#define IRQ_UNUSED (0)
	52	#define IRQ_USED (1)
	53	#define IRQ_RSVD (2)
	54
10083072 MM	55	/* These can be overridden in platform_irq_init */
	56	int ia64_first_device_vector = IA64_DEF_FIRST_DEVICE_VECTOR;
	57	int ia64_last_device_vector = IA64_DEF_LAST_DEVICE_VECTOR;
	58
1da177e4 LT	59	/* default base addr of IPI table */
	60	void __iomem ipi_base_addr = ((void __iomem )
	61	(__IA64_UNCACHED_OFFSET \| IA64_IPI_DEFAULT_BASE_ADDR));
	62
4994be1b YI	63	static cpumask_t vector_allocation_domain(int cpu);
4994be1b YI	64
1da177e4 LT	65	/*
	66	* Legacy IRQ to IA-64 vector translation table.
	67	*/
	68	__u8 isa_irq_to_vector_map[16] = {
	69	/* 8259 IRQ translation, first 16 entries */
	70	0x2f, 0x20, 0x2e, 0x2d, 0x2c, 0x2b, 0x2a, 0x29,
	71	0x28, 0x27, 0x26, 0x25, 0x24, 0x23, 0x22, 0x21
	72	};
	73	EXPORT_SYMBOL(isa_irq_to_vector_map);
	74
e1b30a39 YI	75	DEFINE_SPINLOCK(vector_lock);
	76
	77	struct irq_cfg irq_cfg[NR_IRQS] __read_mostly = {
4994be1b YI	78	[0 ... NR_IRQS - 1] = {
	79	.vector = IRQ_VECTOR_UNASSIGNED,
	80	.domain = CPU_MASK_NONE
	81	}
e1b30a39 YI	82	};
	83
	84	DEFINE_PER_CPU(int[IA64_NUM_VECTORS], vector_irq) = {
17764d24	85	[0 ... IA64_NUM_VECTORS - 1] = -1
e1b30a39 YI	86	};
e1b30a39 YI	87
6ffbc823 KK	88	static cpumask_t vector_table[IA64_NUM_VECTORS] = {
6ffbc823 KK	89	[0 ... IA64_NUM_VECTORS - 1] = CPU_MASK_NONE
4994be1b YI	90	};
4994be1b YI	91
e1b30a39 YI	92	static int irq_status[NR_IRQS] = {
	93	[0 ... NR_IRQS -1] = IRQ_UNUSED
	94	};
	95
	96	int check_irq_used(int irq)
	97	{
	98	if (irq_status[irq] == IRQ_USED)
	99	return 1;
	100
	101	return -1;
	102	}
	103
e1b30a39 YI	104	static inline int find_unassigned_irq(void)
	105	{
	106	int irq;
	107
	108	for (irq = IA64_FIRST_DEVICE_VECTOR; irq < NR_IRQS; irq++)
	109	if (irq_status[irq] == IRQ_UNUSED)
	110	return irq;
	111	return -ENOSPC;
	112	}
	113
4994be1b	114	static inline int find_unassigned_vector(cpumask_t domain)
e1b30a39	115	{
4994be1b	116	cpumask_t mask;
6ffbc823	117	int pos, vector;
4994be1b YI	118
	119	cpus_and(mask, domain, cpu_online_map);
	120	if (cpus_empty(mask))
	121	return -EINVAL;
e1b30a39	122
4994be1b	123	for (pos = 0; pos < IA64_NUM_DEVICE_VECTORS; pos++) {
6ffbc823 KK	124	vector = IA64_FIRST_DEVICE_VECTOR + pos;
6ffbc823 KK	125	cpus_and(mask, domain, vector_table[vector]);
4994be1b YI	126	if (!cpus_empty(mask))
4994be1b YI	127	continue;
6ffbc823	128	return vector;
4994be1b	129	}
e1b30a39 YI	130	return -ENOSPC;
	131	}
	132
4994be1b	133	static int __bind_irq_vector(int irq, int vector, cpumask_t domain)
e1b30a39	134	{
4994be1b	135	cpumask_t mask;
6ffbc823	136	int cpu;
4994be1b	137	struct irq_cfg *cfg = &irq_cfg[irq];
e1b30a39	138
6bde71ec KK	139	BUG_ON((unsigned)irq >= NR_IRQS);
	140	BUG_ON((unsigned)vector >= IA64_NUM_VECTORS);
	141
4994be1b YI	142	cpus_and(mask, domain, cpu_online_map);
	143	if (cpus_empty(mask))
	144	return -EINVAL;
	145	if ((cfg->vector == vector) && cpus_equal(cfg->domain, domain))
e1b30a39	146	return 0;
4994be1b	147	if (cfg->vector != IRQ_VECTOR_UNASSIGNED)
e1b30a39	148	return -EBUSY;
4994be1b	149	for_each_cpu_mask(cpu, mask)
e1b30a39	150	per_cpu(vector_irq, cpu)[vector] = irq;
4994be1b YI	151	cfg->vector = vector;
4994be1b YI	152	cfg->domain = domain;
e1b30a39	153	irq_status[irq] = IRQ_USED;
6ffbc823	154	cpus_or(vector_table[vector], vector_table[vector], domain);
e1b30a39 YI	155	return 0;
	156	}
	157
4994be1b	158	int bind_irq_vector(int irq, int vector, cpumask_t domain)
e1b30a39 YI	159	{
	160	unsigned long flags;
	161	int ret;
	162
	163	spin_lock_irqsave(&vector_lock, flags);
4994be1b	164	ret = __bind_irq_vector(irq, vector, domain);
e1b30a39 YI	165	spin_unlock_irqrestore(&vector_lock, flags);
	166	return ret;
	167	}
	168
cd378f18	169	static void __clear_irq_vector(int irq)
e1b30a39	170	{
6ffbc823	171	int vector, cpu;
4994be1b YI	172	cpumask_t mask;
	173	cpumask_t domain;
	174	struct irq_cfg *cfg = &irq_cfg[irq];
e1b30a39	175
e1b30a39	176	BUG_ON((unsigned)irq >= NR_IRQS);
4994be1b YI	177	BUG_ON(cfg->vector == IRQ_VECTOR_UNASSIGNED);
	178	vector = cfg->vector;
	179	domain = cfg->domain;
	180	cpus_and(mask, cfg->domain, cpu_online_map);
	181	for_each_cpu_mask(cpu, mask)
17764d24	182	per_cpu(vector_irq, cpu)[vector] = -1;
4994be1b YI	183	cfg->vector = IRQ_VECTOR_UNASSIGNED;
4994be1b YI	184	cfg->domain = CPU_MASK_NONE;
e1b30a39	185	irq_status[irq] = IRQ_UNUSED;
6ffbc823	186	cpus_andnot(vector_table[vector], vector_table[vector], domain);
cd378f18 YI	187	}
	188
	189	static void clear_irq_vector(int irq)
	190	{
	191	unsigned long flags;
	192
	193	spin_lock_irqsave(&vector_lock, flags);
	194	__clear_irq_vector(irq);
e1b30a39 YI	195	spin_unlock_irqrestore(&vector_lock, flags);
e1b30a39 YI	196	}
1da177e4 LT	197
1da177e4 LT	198	int
85cbc503	199	ia64_native_assign_irq_vector (int irq)
1da177e4	200	{
e1b30a39	201	unsigned long flags;
4994be1b	202	int vector, cpu;
373167e8	203	cpumask_t domain = CPU_MASK_NONE;
4994be1b YI	204
4994be1b YI	205	vector = -ENOSPC;
e1b30a39	206
4994be1b	207	spin_lock_irqsave(&vector_lock, flags);
4994be1b YI	208	for_each_online_cpu(cpu) {
	209	domain = vector_allocation_domain(cpu);
	210	vector = find_unassigned_vector(domain);
	211	if (vector >= 0)
	212	break;
	213	}
e1b30a39 YI	214	if (vector < 0)
e1b30a39 YI	215	goto out;
8f5ad1a8 YI	216	if (irq == AUTO_ASSIGN)
8f5ad1a8 YI	217	irq = vector;
4994be1b	218	BUG_ON(__bind_irq_vector(irq, vector, domain));
e1b30a39	219	out:
4994be1b	220	spin_unlock_irqrestore(&vector_lock, flags);
1da177e4 LT	221	return vector;
	222	}
	223
	224	void
85cbc503	225	ia64_native_free_irq_vector (int vector)
1da177e4	226	{
e1b30a39 YI	227	if (vector < IA64_FIRST_DEVICE_VECTOR \|\|
e1b30a39 YI	228	vector > IA64_LAST_DEVICE_VECTOR)
1da177e4	229	return;
e1b30a39	230	clear_irq_vector(vector);
1da177e4 LT	231	}
1da177e4 LT	232
10083072 MM	233	int
	234	reserve_irq_vector (int vector)
	235	{
10083072 MM	236	if (vector < IA64_FIRST_DEVICE_VECTOR \|\|
	237	vector > IA64_LAST_DEVICE_VECTOR)
	238	return -EINVAL;
4994be1b	239	return !!bind_irq_vector(vector, vector, CPU_MASK_ALL);
e1b30a39	240	}
10083072	241
e1b30a39 YI	242	/*
	243	* Initialize vector_irq on a new cpu. This function must be called
	244	* with vector_lock held.
	245	*/
	246	void __setup_vector_irq(int cpu)
	247	{
	248	int irq, vector;
	249
	250	/* Clear vector_irq */
	251	for (vector = 0; vector < IA64_NUM_VECTORS; ++vector)
17764d24	252	per_cpu(vector_irq, cpu)[vector] = -1;
e1b30a39 YI	253	/* Mark the inuse vectors */
e1b30a39 YI	254	for (irq = 0; irq < NR_IRQS; ++irq) {
4994be1b YI	255	if (!cpu_isset(cpu, irq_cfg[irq].domain))
	256	continue;
	257	vector = irq_to_vector(irq);
	258	per_cpu(vector_irq, cpu)[vector] = irq;
e1b30a39 YI	259	}
	260	}
	261
e5bd762b	262	#if defined(CONFIG_SMP) && (defined(CONFIG_IA64_GENERIC) \|\| defined(CONFIG_IA64_DIG))
a6cd6322	263
d080d397 YI	264	static enum vector_domain_type {
	265	VECTOR_DOMAIN_NONE,
	266	VECTOR_DOMAIN_PERCPU
	267	} vector_domain_type = VECTOR_DOMAIN_NONE;
	268
4994be1b YI	269	static cpumask_t vector_allocation_domain(int cpu)
4994be1b YI	270	{
d080d397 YI	271	if (vector_domain_type == VECTOR_DOMAIN_PERCPU)
d080d397 YI	272	return cpumask_of_cpu(cpu);
4994be1b YI	273	return CPU_MASK_ALL;
	274	}
	275
a6cd6322 KK	276	static int __irq_prepare_move(int irq, int cpu)
	277	{
	278	struct irq_cfg *cfg = &irq_cfg[irq];
	279	int vector;
	280	cpumask_t domain;
	281
	282	if (cfg->move_in_progress \|\| cfg->move_cleanup_count)
	283	return -EBUSY;
	284	if (cfg->vector == IRQ_VECTOR_UNASSIGNED \|\| !cpu_online(cpu))
	285	return -EINVAL;
	286	if (cpu_isset(cpu, cfg->domain))
	287	return 0;
	288	domain = vector_allocation_domain(cpu);
	289	vector = find_unassigned_vector(domain);
	290	if (vector < 0)
	291	return -ENOSPC;
	292	cfg->move_in_progress = 1;
	293	cfg->old_domain = cfg->domain;
	294	cfg->vector = IRQ_VECTOR_UNASSIGNED;
	295	cfg->domain = CPU_MASK_NONE;
	296	BUG_ON(__bind_irq_vector(irq, vector, domain));
	297	return 0;
	298	}
	299
	300	int irq_prepare_move(int irq, int cpu)
	301	{
	302	unsigned long flags;
	303	int ret;
	304
	305	spin_lock_irqsave(&vector_lock, flags);
	306	ret = __irq_prepare_move(irq, cpu);
	307	spin_unlock_irqrestore(&vector_lock, flags);
	308	return ret;
	309	}
	310
	311	void irq_complete_move(unsigned irq)
	312	{
	313	struct irq_cfg *cfg = &irq_cfg[irq];
	314	cpumask_t cleanup_mask;
	315	int i;
	316
	317	if (likely(!cfg->move_in_progress))
	318	return;
	319
	320	if (unlikely(cpu_isset(smp_processor_id(), cfg->old_domain)))
	321	return;
	322
	323	cpus_and(cleanup_mask, cfg->old_domain, cpu_online_map);
	324	cfg->move_cleanup_count = cpus_weight(cleanup_mask);
	325	for_each_cpu_mask(i, cleanup_mask)
	326	platform_send_ipi(i, IA64_IRQ_MOVE_VECTOR, IA64_IPI_DM_INT, 0);
	327	cfg->move_in_progress = 0;
	328	}
	329
	330	static irqreturn_t smp_irq_move_cleanup_interrupt(int irq, void *dev_id)
	331	{
	332	int me = smp_processor_id();
	333	ia64_vector vector;
	334	unsigned long flags;
	335
	336	for (vector = IA64_FIRST_DEVICE_VECTOR;
	337	vector < IA64_LAST_DEVICE_VECTOR; vector++) {
	338	int irq;
	339	struct irq_desc *desc;
340	struct irq_cfg *cfg;
341	irq = __get_cpu_var(vector_irq)[vector];
342	if (irq < 0)
343	continue;
344
345	desc = irq_desc + irq;
346	cfg = irq_cfg + irq;
239007b8	347	raw_spin_lock(&desc->lock);
a6cd6322 KK	348	if (!cfg->move_cleanup_count)
	349	goto unlock;
	350
	351	if (!cpu_isset(me, cfg->old_domain))
	352	goto unlock;
	353
	354	spin_lock_irqsave(&vector_lock, flags);
	355	__get_cpu_var(vector_irq)[vector] = -1;
	356	cpu_clear(me, vector_table[vector]);
	357	spin_unlock_irqrestore(&vector_lock, flags);
	358	cfg->move_cleanup_count--;
	359	unlock:
239007b8	360	raw_spin_unlock(&desc->lock);
a6cd6322 KK	361	}
	362	return IRQ_HANDLED;
	363	}
	364
	365	static struct irqaction irq_move_irqaction = {
	366	.handler = smp_irq_move_cleanup_interrupt,
	367	.flags = IRQF_DISABLED,
	368	.name = "irq_move"
	369	};
	370
d080d397 YI	371	static int __init parse_vector_domain(char *arg)
	372	{
	373	if (!arg)
	374	return -EINVAL;
	375	if (!strcmp(arg, "percpu")) {
	376	vector_domain_type = VECTOR_DOMAIN_PERCPU;
	377	no_int_routing = 1;
	378	}
074ff856	379	return 0;
d080d397 YI	380	}
	381	early_param("vector", parse_vector_domain);
	382	#else
	383	static cpumask_t vector_allocation_domain(int cpu)
	384	{
	385	return CPU_MASK_ALL;
	386	}
	387	#endif
	388
4994be1b	389
e1b30a39 YI	390	void destroy_and_reserve_irq(unsigned int irq)
e1b30a39 YI	391	{
216fcd29 KK	392	unsigned long flags;
216fcd29 KK	393
e1b30a39 YI	394	dynamic_irq_cleanup(irq);
e1b30a39 YI	395
216fcd29 KK	396	spin_lock_irqsave(&vector_lock, flags);
	397	__clear_irq_vector(irq);
	398	irq_status[irq] = IRQ_RSVD;
	399	spin_unlock_irqrestore(&vector_lock, flags);
10083072 MM	400	}
10083072 MM	401
b6cf2583 EB	402	/*
	403	* Dynamic irq allocate and deallocation for MSI
	404	*/
	405	int create_irq(void)
	406	{
e1b30a39	407	unsigned long flags;
4994be1b	408	int irq, vector, cpu;
373167e8	409	cpumask_t domain = CPU_MASK_NONE;
e1b30a39	410
4994be1b	411	irq = vector = -ENOSPC;
e1b30a39	412	spin_lock_irqsave(&vector_lock, flags);
4994be1b YI	413	for_each_online_cpu(cpu) {
	414	domain = vector_allocation_domain(cpu);
	415	vector = find_unassigned_vector(domain);
	416	if (vector >= 0)
	417	break;
	418	}
e1b30a39 YI	419	if (vector < 0)
	420	goto out;
	421	irq = find_unassigned_irq();
	422	if (irq < 0)
	423	goto out;
4994be1b	424	BUG_ON(__bind_irq_vector(irq, vector, domain));
e1b30a39 YI	425	out:
	426	spin_unlock_irqrestore(&vector_lock, flags);
	427	if (irq >= 0)
	428	dynamic_irq_init(irq);
	429	return irq;
b6cf2583 EB	430	}
	431
	432	void destroy_irq(unsigned int irq)
	433	{
	434	dynamic_irq_cleanup(irq);
e1b30a39	435	clear_irq_vector(irq);
b6cf2583 EB	436	}
b6cf2583 EB	437
1da177e4 LT	438	#ifdef CONFIG_SMP
1da177e4 LT	439	# define IS_RESCHEDULE(vec) (vec == IA64_IPI_RESCHEDULE)
3be44b9c	440	# define IS_LOCAL_TLB_FLUSH(vec) (vec == IA64_IPI_LOCAL_TLB_FLUSH)
1da177e4 LT	441	#else
1da177e4 LT	442	# define IS_RESCHEDULE(vec) (0)
3be44b9c	443	# define IS_LOCAL_TLB_FLUSH(vec) (0)
1da177e4 LT	444	#endif
	445	/*
	446	* That's where the IVT branches when we get an external
	447	* interrupt. This branches to the correct hardware IRQ handler via
	448	* function ptr.
	449	*/
	450	void
	451	ia64_handle_irq (ia64_vector vector, struct pt_regs *regs)
	452	{
7d12e780	453	struct pt_regs *old_regs = set_irq_regs(regs);
1da177e4 LT	454	unsigned long saved_tpr;
	455
	456	#if IRQ_DEBUG
	457	{
	458	unsigned long bsp, sp;
	459
	460	/*
	461	* Note: if the interrupt happened while executing in
	462	* the context switch routine (ia64_switch_to), we may
	463	* get a spurious stack overflow here. This is
	464	* because the register and the memory stack are not
	465	* switched atomically.
	466	*/
	467	bsp = ia64_getreg(_IA64_REG_AR_BSP);
	468	sp = ia64_getreg(_IA64_REG_SP);
	469
	470	if ((sp - bsp) < 1024) {
7683a3f9	471	static DEFINE_RATELIMIT_STATE(ratelimit, 5 * HZ, 5);
1da177e4	472
7683a3f9	473	if (__ratelimit(&ratelimit)) {
1da177e4 LT	474	printk("ia64_handle_irq: DANGER: less than "
	475	"1KB of free stack space!!\n"
	476	"(bsp=0x%lx, sp=%lx)\n", bsp, sp);
	477	}
	478	}
	479	}
	480	#endif /* IRQ_DEBUG */
	481
	482	/*
	483	* Always set TPR to limit maximum interrupt nesting depth to
	484	* 16 (without this, it would be ~240, which could easily lead
	485	* to kernel stack overflows).
	486	*/
	487	irq_enter();
	488	saved_tpr = ia64_getreg(_IA64_REG_CR_TPR);
	489	ia64_srlz_d();
	490	while (vector != IA64_SPURIOUS_INT_VECTOR) {
66f3e6af	491	int irq = local_vector_to_irq(vector);
7c730ccd	492	struct irq_desc *desc = irq_to_desc(irq);
66f3e6af	493
3be44b9c JS	494	if (unlikely(IS_LOCAL_TLB_FLUSH(vector))) {
3be44b9c JS	495	smp_local_flush_tlb();
66f3e6af	496	kstat_incr_irqs_this_cpu(irq, desc);
7c730ccd	497	} else if (unlikely(IS_RESCHEDULE(vector))) {
66f3e6af	498	kstat_incr_irqs_this_cpu(irq, desc);
7c730ccd	499	} else {
1da177e4 LT	500	ia64_setreg(_IA64_REG_CR_TPR, vector);
	501	ia64_srlz_d();
	502
17764d24 KK	503	if (unlikely(irq < 0)) {
	504	printk(KERN_ERR "%s: Unexpected interrupt "
	505	"vector %d on CPU %d is not mapped "
d4ed8084	506	"to any IRQ!\n", __func__, vector,
17764d24 KK	507	smp_processor_id());
	508	} else
	509	generic_handle_irq(irq);
1da177e4 LT	510
	511	/*
	512	* Disable interrupts and send EOI:
	513	*/
	514	local_irq_disable();
	515	ia64_setreg(_IA64_REG_CR_TPR, saved_tpr);
	516	}
	517	ia64_eoi();
	518	vector = ia64_get_ivr();
	519	}
	520	/*
	521	* This must be done after the ia64_eoi(). For example, the keyboard softirq
	522	* handler needs to be able to wait for further keyboard interrupts, which can't
	523	* come through until ia64_eoi() has been done.
	524	*/
	525	irq_exit();
7d12e780	526	set_irq_regs(old_regs);
1da177e4 LT	527	}
	528
	529	#ifdef CONFIG_HOTPLUG_CPU
	530	/*
	531	* This function emulates a interrupt processing when a cpu is about to be
	532	* brought down.
	533	*/
	534	void ia64_process_pending_intr(void)
	535	{
	536	ia64_vector vector;
	537	unsigned long saved_tpr;
	538	extern unsigned int vectors_in_migration[NR_IRQS];
	539
	540	vector = ia64_get_ivr();
	541
66f3e6af JS	542	irq_enter();
	543	saved_tpr = ia64_getreg(_IA64_REG_CR_TPR);
	544	ia64_srlz_d();
1da177e4 LT	545
	546	/*
	547	* Perform normal interrupt style processing
	548	*/
	549	while (vector != IA64_SPURIOUS_INT_VECTOR) {
66f3e6af	550	int irq = local_vector_to_irq(vector);
7c730ccd	551	struct irq_desc *desc = irq_to_desc(irq);
66f3e6af	552
3be44b9c JS	553	if (unlikely(IS_LOCAL_TLB_FLUSH(vector))) {
3be44b9c JS	554	smp_local_flush_tlb();
66f3e6af	555	kstat_incr_irqs_this_cpu(irq, desc);
7c730ccd	556	} else if (unlikely(IS_RESCHEDULE(vector))) {
66f3e6af	557	kstat_incr_irqs_this_cpu(irq, desc);
7c730ccd	558	} else {
8c1addbc TL	559	struct pt_regs *old_regs = set_irq_regs(NULL);
8c1addbc TL	560
1da177e4 LT	561	ia64_setreg(_IA64_REG_CR_TPR, vector);
	562	ia64_srlz_d();
	563
	564	/*
	565	* Now try calling normal ia64_handle_irq as it would have got called
	566	* from a real intr handler. Try passing null for pt_regs, hopefully
	567	* it will work. I hope it works!.
	568	* Probably could shared code.
	569	*/
17764d24 KK	570	if (unlikely(irq < 0)) {
	571	printk(KERN_ERR "%s: Unexpected interrupt "
	572	"vector %d on CPU %d not being mapped "
d4ed8084	573	"to any IRQ!!\n", __func__, vector,
17764d24 KK	574	smp_processor_id());
	575	} else {
	576	vectors_in_migration[irq]=0;
	577	generic_handle_irq(irq);
	578	}
8c1addbc	579	set_irq_regs(old_regs);
1da177e4 LT	580
	581	/*
	582	* Disable interrupts and send EOI
	583	*/
	584	local_irq_disable();
	585	ia64_setreg(_IA64_REG_CR_TPR, saved_tpr);
	586	}
	587	ia64_eoi();
	588	vector = ia64_get_ivr();
	589	}
	590	irq_exit();
	591	}
	592	#endif
	593
	594
	595	#ifdef CONFIG_SMP
1da177e4	596
9b3377f9 JS	597	static irqreturn_t dummy_handler (int irq, void *dev_id)
	598	{
	599	BUG();
	600	}
	601
1da177e4 LT	602	static struct irqaction ipi_irqaction = {
1da177e4 LT	603	.handler = handle_IPI,
121a4226	604	.flags = IRQF_DISABLED,
1da177e4 LT	605	.name = "IPI"
1da177e4 LT	606	};
9b3377f9	607
32f88400 MT	608	/*
	609	* KVM uses this interrupt to force a cpu out of guest mode
	610	*/
9b3377f9 JS	611	static struct irqaction resched_irqaction = {
9b3377f9 JS	612	.handler = dummy_handler,
38515e90	613	.flags = IRQF_DISABLED,
9b3377f9 JS	614	.name = "resched"
9b3377f9 JS	615	};
3be44b9c JS	616
	617	static struct irqaction tlb_irqaction = {
	618	.handler = dummy_handler,
5329571b	619	.flags = IRQF_DISABLED,
3be44b9c JS	620	.name = "tlb_flush"
	621	};
	622
1da177e4 LT	623	#endif
	624
	625	void
85cbc503	626	ia64_native_register_percpu_irq (ia64_vector vec, struct irqaction *action)
1da177e4	627	{
86bc3dfe	628	struct irq_desc *desc;
1da177e4 LT	629	unsigned int irq;
1da177e4 LT	630
e1b30a39	631	irq = vec;
4994be1b	632	BUG_ON(bind_irq_vector(irq, vec, CPU_MASK_ALL));
e1b30a39 YI	633	desc = irq_desc + irq;
	634	desc->status \|= IRQ_PER_CPU;
	635	desc->chip = &irq_type_ia64_lsapic;
	636	if (action)
	637	setup_irq(irq, action);
1da177e4 LT	638	}
	639
	640	void __init
85cbc503	641	ia64_native_register_ipi(void)
1da177e4	642	{
1da177e4 LT	643	#ifdef CONFIG_SMP
1da177e4 LT	644	register_percpu_irq(IA64_IPI_VECTOR, &ipi_irqaction);
9b3377f9	645	register_percpu_irq(IA64_IPI_RESCHEDULE, &resched_irqaction);
3be44b9c	646	register_percpu_irq(IA64_IPI_LOCAL_TLB_FLUSH, &tlb_irqaction);
85cbc503 IY	647	#endif
	648	}
	649
	650	void __init
	651	init_IRQ (void)
	652	{
	653	ia64_register_ipi();
	654	register_percpu_irq(IA64_SPURIOUS_INT_VECTOR, NULL);
	655	#ifdef CONFIG_SMP
a6cd6322	656	#if defined(CONFIG_IA64_GENERIC) \|\| defined(CONFIG_IA64_DIG)
09b366b7	657	if (vector_domain_type != VECTOR_DOMAIN_NONE)
a6cd6322	658	register_percpu_irq(IA64_IRQ_MOVE_VECTOR, &irq_move_irqaction);
a6cd6322	659	#endif
1da177e4 LT	660	#endif
	661	#ifdef CONFIG_PERFMON
	662	pfm_init_percpu();
	663	#endif
	664	platform_irq_init();
	665	}
	666
	667	void
	668	ia64_send_ipi (int cpu, int vector, int delivery_mode, int redirect)
	669	{
	670	void __iomem *ipi_addr;
	671	unsigned long ipi_data;
	672	unsigned long phys_cpu_id;
	673
1da177e4	674	phys_cpu_id = cpu_physical_id(cpu);
1da177e4 LT	675
	676	/*
	677	* cpu number is in 8bit ID and 8bit EID
	678	*/
	679
	680	ipi_data = (delivery_mode << 8) \| (vector & 0xff);
	681	ipi_addr = ipi_base_addr + ((phys_cpu_id << 4) \| ((redirect & 1) << 3));
	682
	683	writeq(ipi_data, ipi_addr);
	684	}