11 files changed, 295 insertions, 726 deletions

diff --git a/arch/sparc64/kernel/devices.c b/arch/sparc64/kernel/devices.c
index 0684899d998..0dd95ae50e1 100644
--- a/arch/sparc64/kernel/devices.c
+++ b/arch/sparc64/kernel/devices.c
@@ -157,7 +157,7 @@ unsigned int sun4v_vdev_device_interrupt(unsigned int dev_node)
 		return 0;
 	}
 
-	return sun4v_build_irq(sun4v_vdev_devhandle, irq, 0);
+	return sun4v_build_irq(sun4v_vdev_devhandle, irq);
 }
 
 static const char *cpu_mid_prop(void)
diff --git a/arch/sparc64/kernel/entry.S b/arch/sparc64/kernel/entry.S
index c87365e59e7..be85ce2a4ad 100644
--- a/arch/sparc64/kernel/entry.S
+++ b/arch/sparc64/kernel/entry.S
@@ -432,7 +432,7 @@ do_ivec:
 	membar		#Sync
 
 	sethi		%hi(ivector_table), %g2
-	sllx		%g3, 5, %g3
+	sllx		%g3, 3, %g3
 	or		%g2, %lo(ivector_table), %g2
 	add		%g2, %g3, %g3
 
diff --git a/arch/sparc64/kernel/irq.c b/arch/sparc64/kernel/irq.c
index 49ad9cd0f8c..a8c9dc8d195 100644
--- a/arch/sparc64/kernel/irq.c
+++ b/arch/sparc64/kernel/irq.c
@@ -22,6 +22,7 @@
 #include <linux/proc_fs.h>
 #include <linux/seq_file.h>
 #include <linux/bootmem.h>
+#include <linux/irq.h>
 
 #include <asm/ptrace.h>
 #include <asm/processor.h>
@@ -42,10 +43,6 @@
 #include <asm/auxio.h>
 #include <asm/head.h>
 
-#ifdef CONFIG_SMP
-static void distribute_irqs(void);
-#endif
-
 /* UPA nodes send interrupt packet to UltraSparc with first data reg
  * value low 5 (7 on Starfire) bits holding the IRQ identifier being
  * delivered.  We must translate this into a non-vector IRQ so we can
@@ -57,10 +54,29 @@ static void distribute_irqs(void);
  * The IVEC handler does not need to act atomically, the PIL dispatch
  * code uses CAS to get an atomic snapshot of the list and clear it
  * at the same time.
+ *
+ * If you make changes to ino_bucket, please update hand coded assembler
+ * of the vectored interrupt trap handler(s) in entry.S and sun4v_ivec.S
  */
+struct ino_bucket {
+	/* Next handler in per-CPU IRQ worklist.  We know that
+	 * bucket pointers have the high 32-bits clear, so to
+	 * save space we only store the bits we need.
+	 */
+/*0x00*/unsigned int irq_chain;
 
+	/* Virtual interrupt number assigned to this INO.  */
+/*0x04*/unsigned int virt_irq;
+};
+
+#define NUM_IVECS	(IMAP_INR + 1)
 struct ino_bucket ivector_table[NUM_IVECS] __attribute__ ((aligned (SMP_CACHE_BYTES)));
 
+#define __irq_ino(irq) \
+        (((struct ino_bucket *)(unsigned long)(irq)) - &ivector_table[0])
+#define __bucket(irq) ((struct ino_bucket *)(unsigned long)(irq))
+#define __irq(bucket) ((unsigned int)(unsigned long)(bucket))
+
 /* This has to be in the main kernel image, it cannot be
  * turned into per-cpu data.  The reason is that the main
  * kernel image is locked into the TLB and this structure
@@ -70,18 +86,6 @@ struct ino_bucket ivector_table[NUM_IVECS] __attribute__ ((aligned (SMP_CACHE_BY
  */
 #define irq_work(__cpu)	&(trap_block[(__cpu)].irq_worklist)
 
-static struct irqaction timer_irq_action = {
-	.name = "timer",
-};
-static struct irqaction *irq_action[NR_IRQS] = { &timer_irq_action, };
-
-/* This only synchronizes entities which modify IRQ handler
- * state and some selected user-level spots that want to
- * read things in the table.  IRQ handler processing orders
- * its' accesses such that no locking is needed.
- */
-static DEFINE_SPINLOCK(irq_action_lock);
-
 static unsigned int virt_to_real_irq_table[NR_IRQS];
 static unsigned char virt_irq_cur = 1;
 
@@ -117,69 +121,45 @@ static unsigned int virt_to_real_irq(unsigned char virt_irq)
 	return virt_to_real_irq_table[virt_irq];
 }
 
-void irq_install_pre_handler(int virt_irq,
-			     void (*func)(struct ino_bucket *, void *, void *),
-			     void *arg1, void *arg2)
-{
-	unsigned int real_irq = virt_to_real_irq(virt_irq);
-	struct ino_bucket *bucket;
-	struct irq_desc *d;
-
-	if (unlikely(!real_irq))
-		return;
-
-	bucket = __bucket(real_irq);
-	d = bucket->irq_info;
-	d->pre_handler = func;
-	d->pre_handler_arg1 = arg1;
-	d->pre_handler_arg2 = arg2;
-}
-
-static void register_irq_proc (unsigned int irq);
-
 /*
- * Upper 2b of irqaction->flags holds the ino.
- * irqaction->mask holds the smp affinity information.
+ * /proc/interrupts printing:
  */
-#define put_ino_in_irqaction(action, irq) \
-	action->flags &= 0xffffffffffffUL; \
-	action->flags |= __irq_ino(irq) << 48;
-
-#define get_ino_in_irqaction(action)	(action->flags >> 48)
-
-#define put_smpaff_in_irqaction(action, smpaff)	(action)->mask = (smpaff)
-#define get_smpaff_in_irqaction(action) 	((action)->mask)
 
 int show_interrupts(struct seq_file *p, void *v)
 {
+	int i = *(loff_t *) v, j;
+	struct irqaction * action;
 	unsigned long flags;
-	int i = *(loff_t *) v;
-	struct irqaction *action;
-#ifdef CONFIG_SMP
-	int j;
-#endif
 
-	spin_lock_irqsave(&irq_action_lock, flags);
-	if (i <= NR_IRQS) {
-		if (!(action = *(i + irq_action)))
-			goto out_unlock;
-		seq_printf(p, "%3d: ", i);
+	if (i == 0) {
+		seq_printf(p, "           ");
+		for_each_online_cpu(j)
+			seq_printf(p, "CPU%d       ",j);
+		seq_putc(p, '\n');
+	}
+
+	if (i < NR_IRQS) {
+		spin_lock_irqsave(&irq_desc[i].lock, flags);
+		action = irq_desc[i].action;
+		if (!action)
+			goto skip;
+		seq_printf(p, "%3d: ",i);
 #ifndef CONFIG_SMP
 		seq_printf(p, "%10u ", kstat_irqs(i));
 #else
-		for_each_online_cpu(j) {
-			seq_printf(p, "%10u ",
-				   kstat_cpu(j).irqs[i]);
-		}
+		for_each_online_cpu(j)
+			seq_printf(p, "%10u ", kstat_cpu(j).irqs[i]);
 #endif
-		seq_printf(p, " %s", action->name);
-		for (action = action->next; action; action = action->next)
+		seq_printf(p, " %9s", irq_desc[i].handler->typename);
+		seq_printf(p, "  %s", action->name);
+
+		for (action=action->next; action; action = action->next)
 			seq_printf(p, ", %s", action->name);
+
 		seq_putc(p, '\n');
+skip:
+		spin_unlock_irqrestore(&irq_desc[i].lock, flags);
 	}
-out_unlock:
-	spin_unlock_irqrestore(&irq_action_lock, flags);
-
 	return 0;
 }
 
@@ -220,509 +200,321 @@ static unsigned int sun4u_compute_tid(unsigned long imap, unsigned long cpuid)
 	return tid;
 }
 
-void enable_irq(unsigned int virt_irq)
-{
-	unsigned int real_irq = virt_to_real_irq(virt_irq);
-	struct ino_bucket *bucket;
-	unsigned long imap, cpuid;
-
-	if (unlikely(!real_irq))
-		return;
+struct irq_handler_data {
+	unsigned long	iclr;
+	unsigned long	imap;
 
-	bucket = __bucket(real_irq);
-	imap = bucket->imap;
-	if (unlikely(imap == 0UL))
-		return;
-
-	preempt_disable();
-
-	/* This gets the physical processor ID, even on uniprocessor,
-	 * so we can always program the interrupt target correctly.
-	 */
-	cpuid = real_hard_smp_processor_id();
-
-	if (tlb_type == hypervisor) {
-		unsigned int ino = __irq_ino(real_irq);
-		int err;
-
-		err = sun4v_intr_settarget(ino, cpuid);
-		if (err != HV_EOK)
-			printk("sun4v_intr_settarget(%x,%lu): err(%d)\n",
-			       ino, cpuid, err);
-		err = sun4v_intr_setenabled(ino, HV_INTR_ENABLED);
-		if (err != HV_EOK)
-			printk("sun4v_intr_setenabled(%x): err(%d)\n",
-			       ino, err);
-	} else {
-		unsigned int tid = sun4u_compute_tid(imap, cpuid);
-
-		/* NOTE NOTE NOTE, IGN and INO are read-only, IGN is a product
-		 * of this SYSIO's preconfigured IGN in the SYSIO Control
-		 * Register, the hardware just mirrors that value here.
-		 * However for Graphics and UPA Slave devices the full
-		 * IMAP_INR field can be set by the programmer here.
-		 *
-		 * Things like FFB can now be handled via the new IRQ
-		 * mechanism.
-		 */
-		upa_writel(tid | IMAP_VALID, imap);
-	}
-
-	preempt_enable();
-}
+	void		(*pre_handler)(unsigned int, void *, void *);
+	void		*pre_handler_arg1;
+	void		*pre_handler_arg2;
+};
 
-void disable_irq(unsigned int virt_irq)
+static inline struct ino_bucket *virt_irq_to_bucket(unsigned int virt_irq)
 {
 	unsigned int real_irq = virt_to_real_irq(virt_irq);
-	struct ino_bucket *bucket;
-	unsigned long imap;
+	struct ino_bucket *bucket = NULL;
 
-	if (unlikely(!real_irq))
-		return;
-
-	bucket = __bucket(real_irq);
-	imap = bucket->imap;
-	if (unlikely(imap == 0UL))
-		return;
-
-	if (tlb_type == hypervisor) {
-		unsigned int ino = __irq_ino(real_irq);
-		int err;
+	if (likely(real_irq))
+		bucket = __bucket(real_irq);
 
-		err = sun4v_intr_setenabled(ino, HV_INTR_DISABLED);
-		if (err != HV_EOK)
-			printk("sun4v_intr_setenabled(%x): "
-			       "err(%d)\n", ino, err);
-	} else {
-		u32 tmp;
-
-		/* NOTE: We do not want to futz with the IRQ clear registers
-		 *       and move the state to IDLE, the SCSI code does call
-		 *       disable_irq() to assure atomicity in the queue cmd
-		 *       SCSI adapter driver code.  Thus we'd lose interrupts.
-		 */
-		tmp = upa_readl(imap);
-		tmp &= ~IMAP_VALID;
-		upa_writel(tmp, imap);
-	}
+	return bucket;
 }
 
-static void build_irq_error(const char *msg, unsigned int ino, int inofixup,
-			    unsigned long iclr, unsigned long imap,
-			    struct ino_bucket *bucket)
+#ifdef CONFIG_SMP
+static int irq_choose_cpu(unsigned int virt_irq)
 {
-	prom_printf("IRQ: INO %04x (%016lx:%016lx) --> "
-		    "(%d:%016lx:%016lx), halting...\n",
-		    ino, bucket->iclr, bucket->imap,
-		    inofixup, iclr, imap);
-	prom_halt();
-}
+	cpumask_t mask = irq_affinity[virt_irq];
+	int cpuid;
 
-unsigned int build_irq(int inofixup, unsigned long iclr, unsigned long imap, unsigned char flags)
-{
-	struct ino_bucket *bucket;
-	int ino;
+	if (cpus_equal(mask, CPU_MASK_ALL)) {
+		static int irq_rover;
+		static DEFINE_SPINLOCK(irq_rover_lock);
+		unsigned long flags;
 
-	BUG_ON(tlb_type == hypervisor);
+		/* Round-robin distribution... */
+	do_round_robin:
+		spin_lock_irqsave(&irq_rover_lock, flags);
 
-	/* RULE: Both must be specified. */
-	if (iclr == 0UL || imap == 0UL) {
-		prom_printf("Invalid build_irq %d %016lx %016lx\n",
-			    inofixup, iclr, imap);
-		prom_halt();
-	}
-	
-	ino = (upa_readl(imap) & (IMAP_IGN | IMAP_INO)) + inofixup;
-	if (ino > NUM_IVECS) {
-		prom_printf("Invalid INO %04x (%d:%016lx:%016lx)\n",
-			    ino, inofixup, iclr, imap);
-		prom_halt();
-	}
+		while (!cpu_online(irq_rover)) {
+			if (++irq_rover >= NR_CPUS)
+				irq_rover = 0;
+		}
+		cpuid = irq_rover;
+		do {
+			if (++irq_rover >= NR_CPUS)
+				irq_rover = 0;
+		} while (!cpu_online(irq_rover));
 
-	bucket = &ivector_table[ino];
-	if (bucket->flags & IBF_ACTIVE)
-		build_irq_error("IRQ: Trying to build active INO bucket.\n",
-				ino, inofixup, iclr, imap, bucket);
+		spin_unlock_irqrestore(&irq_rover_lock, flags);
+	} else {
+		cpumask_t tmp;
 
-	if (bucket->irq_info) {
-		if (bucket->imap != imap || bucket->iclr != iclr)
-			build_irq_error("IRQ: Trying to reinit INO bucket.\n",
-					ino, inofixup, iclr, imap, bucket);
+		cpus_and(tmp, cpu_online_map, mask);
 
-		goto out;
-	}
+		if (cpus_empty(tmp))
+			goto do_round_robin;
 
-	bucket->irq_info = kzalloc(sizeof(struct irq_desc), GFP_ATOMIC);
-	if (!bucket->irq_info) {
-		prom_printf("IRQ: Error, kmalloc(irq_desc) failed.\n");
-		prom_halt();
+		cpuid = first_cpu(tmp);
 	}
 
-	/* Ok, looks good, set it up.  Don't touch the irq_chain or
-	 * the pending flag.
-	 */
-	bucket->imap  = imap;
-	bucket->iclr  = iclr;
-	if (!bucket->virt_irq)
-		bucket->virt_irq = virt_irq_alloc(__irq(bucket));
-	bucket->flags = flags;
-
-out:
-	return bucket->virt_irq;
+	return cpuid;
+}
+#else
+static int irq_choose_cpu(unsigned int virt_irq)
+{
+	return real_hard_smp_processor_id();
 }
+#endif
 
-unsigned int sun4v_build_irq(u32 devhandle, unsigned int devino, unsigned char flags)
+static void sun4u_irq_enable(unsigned int virt_irq)
 {
-	struct ino_bucket *bucket;
-	unsigned long sysino;
+	irq_desc_t *desc = irq_desc + virt_irq;
+	struct irq_handler_data *data = desc->handler_data;
 
-	sysino = sun4v_devino_to_sysino(devhandle, devino);
+	if (likely(data)) {
+		unsigned long cpuid, imap;
+		unsigned int tid;
 
-	bucket = &ivector_table[sysino];
+		cpuid = irq_choose_cpu(virt_irq);
+		imap = data->imap;
 
-	/* Catch accidental accesses to these things.  IMAP/ICLR handling
-	 * is done by hypervisor calls on sun4v platforms, not by direct
-	 * register accesses.
-	 *
-	 * But we need to make them look unique for the disable_irq() logic
-	 * in free_irq().
-	 */
-	bucket->imap = ~0UL - sysino;
-	bucket->iclr = ~0UL - sysino;
-	if (!bucket->virt_irq)
-		bucket->virt_irq = virt_irq_alloc(__irq(bucket));
-	bucket->flags = flags;
+		tid = sun4u_compute_tid(imap, cpuid);
 
-	bucket->irq_info = kzalloc(sizeof(struct irq_desc), GFP_ATOMIC);
-	if (!bucket->irq_info) {
-		prom_printf("IRQ: Error, kmalloc(irq_desc) failed.\n");
-		prom_halt();
+		upa_writel(tid | IMAP_VALID, imap);
 	}
-
-	return bucket->virt_irq;
 }
 
-static void atomic_bucket_insert(struct ino_bucket *bucket)
+static void sun4u_irq_disable(unsigned int virt_irq)
 {
-	unsigned long pstate;
-	unsigned int *ent;
+	irq_desc_t *desc = irq_desc + virt_irq;
+	struct irq_handler_data *data = desc->handler_data;
 
-	__asm__ __volatile__("rdpr %%pstate, %0" : "=r" (pstate));
-	__asm__ __volatile__("wrpr %0, %1, %%pstate"
-			     : : "r" (pstate), "i" (PSTATE_IE));
-	ent = irq_work(smp_processor_id());
-	bucket->irq_chain = *ent;
-	*ent = __irq(bucket);
-	__asm__ __volatile__("wrpr %0, 0x0, %%pstate" : : "r" (pstate));
-}
+	if (likely(data)) {
+		unsigned long imap = data->imap;
+		u32 tmp = upa_readl(imap);
 
-static int check_irq_sharing(int pil, unsigned long irqflags)
-{
-	struct irqaction *action;
-
-	action = *(irq_action + pil);
-	if (action) {
-		if (!(action->flags & SA_SHIRQ) || !(irqflags & SA_SHIRQ))
-			return -EBUSY;
+		tmp &= ~IMAP_VALID;
+		upa_writel(tmp, imap);
 	}
-	return 0;
 }
 
-static void append_irq_action(int pil, struct irqaction *action)
+static void sun4u_irq_end(unsigned int virt_irq)
 {
-	struct irqaction **pp = irq_action + pil;
+	irq_desc_t *desc = irq_desc + virt_irq;
+	struct irq_handler_data *data = desc->handler_data;
 
-	while (*pp)
-		pp = &((*pp)->next);
-	*pp = action;
+	if (likely(data))
+		upa_writel(ICLR_IDLE, data->iclr);
 }
 
-static struct irqaction *get_action_slot(struct ino_bucket *bucket)
+static void sun4v_irq_enable(unsigned int virt_irq)
 {
-	struct irq_desc *desc = bucket->irq_info;
-	int max_irq, i;
+	struct ino_bucket *bucket = virt_irq_to_bucket(virt_irq);
+	unsigned int ino = bucket - &ivector_table[0];
 
-	max_irq = 1;
-	if (bucket->flags & IBF_PCI)
-		max_irq = MAX_IRQ_DESC_ACTION;
-	for (i = 0; i < max_irq; i++) {
-		struct irqaction *p = &desc->action[i];
-		u32 mask = (1 << i);
+	if (likely(bucket)) {
+		unsigned long cpuid;
+		int err;
 
-		if (desc->action_active_mask & mask)
-			continue;
+		cpuid = irq_choose_cpu(virt_irq);
 
-		desc->action_active_mask |= mask;
-		return p;
+		err = sun4v_intr_settarget(ino, cpuid);
+		if (err != HV_EOK)
+			printk("sun4v_intr_settarget(%x,%lu): err(%d)\n",
+			       ino, cpuid, err);
+		err = sun4v_intr_setenabled(ino, HV_INTR_ENABLED);
+		if (err != HV_EOK)
+			printk("sun4v_intr_setenabled(%x): err(%d)\n",
+			       ino, err);
 	}
-	return NULL;
 }
 
-int request_irq(unsigned int virt_irq,
-		irqreturn_t (*handler)(int, void *, struct pt_regs *),
-		unsigned long irqflags, const char *name, void *dev_id)
+static void sun4v_irq_disable(unsigned int virt_irq)
 {
-	struct irqaction *action;
-	struct ino_bucket *bucket;
-	unsigned long flags;
-	unsigned int real_irq;
-	int pending = 0;
-
-	real_irq = virt_to_real_irq(virt_irq);
-	if (unlikely(!real_irq))
-		return -EINVAL;
-
-	if (unlikely(!handler))
-		return -EINVAL;
-
-	bucket = __bucket(real_irq);
-	if (unlikely(!bucket->irq_info))
-		return -ENODEV;
-
-	if (irqflags & SA_SAMPLE_RANDOM) {
-		/*
-		 * This function might sleep, we want to call it first,
-		 * outside of the atomic block.
-		 * Yes, this might clear the entropy pool if the wrong
-		 * driver is attempted to be loaded, without actually
-		 * installing a new handler, but is this really a problem,
-		 * only the sysadmin is able to do this.
-		 */
-		rand_initialize_irq(virt_irq);
-	}
-
-	spin_lock_irqsave(&irq_action_lock, flags);
+	struct ino_bucket *bucket = virt_irq_to_bucket(virt_irq);
+	unsigned int ino = bucket - &ivector_table[0];
 
-	if (check_irq_sharing(virt_irq, irqflags)) {
-		spin_unlock_irqrestore(&irq_action_lock, flags);
-		return -EBUSY;
-	}
+	if (likely(bucket)) {
+		int err;
 
-	action = get_action_slot(bucket);
-	if (!action) { 
-		spin_unlock_irqrestore(&irq_action_lock, flags);
-		return -ENOMEM;
+		err = sun4v_intr_setenabled(ino, HV_INTR_DISABLED);
+		if (err != HV_EOK)
+			printk("sun4v_intr_setenabled(%x): "
+			       "err(%d)\n", ino, err);
 	}
+}
 
-	bucket->flags |= IBF_ACTIVE;
-	pending = bucket->pending;
-	if (pending)
-		bucket->pending = 0;
-
-	action->handler = handler;
-	action->flags = irqflags;
-	action->name = name;
-	action->next = NULL;
-	action->dev_id = dev_id;
-	put_ino_in_irqaction(action, __irq_ino(real_irq));
-	put_smpaff_in_irqaction(action, CPU_MASK_NONE);
-
-	append_irq_action(virt_irq, action);
+static void sun4v_irq_end(unsigned int virt_irq)
+{
+	struct ino_bucket *bucket = virt_irq_to_bucket(virt_irq);
+	unsigned int ino = bucket - &ivector_table[0];
 
-	enable_irq(virt_irq);
+	if (likely(bucket)) {
+		int err;
 
-	/* We ate the IVEC already, this makes sure it does not get lost. */
-	if (pending) {
-		atomic_bucket_insert(bucket);
-		set_softint(1 << PIL_DEVICE_IRQ);
+		err = sun4v_intr_setstate(ino, HV_INTR_STATE_IDLE);
+		if (err != HV_EOK)
+			printk("sun4v_intr_setstate(%x): "
+			       "err(%d)\n", ino, err);
 	}
-
-	spin_unlock_irqrestore(&irq_action_lock, flags);
-
-	register_irq_proc(virt_irq);
-
-#ifdef CONFIG_SMP
-	distribute_irqs();
-#endif
-	return 0;
 }
 
-EXPORT_SYMBOL(request_irq);
-
-static struct irqaction *unlink_irq_action(unsigned int virt_irq, void *dev_id)
+static void run_pre_handler(unsigned int virt_irq)
 {
-	struct irqaction *action, **pp;
-
-	pp = irq_action + virt_irq;
-	action = *pp;
-	if (unlikely(!action))
-		return NULL;
+	struct ino_bucket *bucket = virt_irq_to_bucket(virt_irq);
+	irq_desc_t *desc = irq_desc + virt_irq;
+	struct irq_handler_data *data = desc->handler_data;
 
-	if (unlikely(!action->handler)) {
-		printk("Freeing free IRQ %d\n", virt_irq);
-		return NULL;
+	if (likely(data->pre_handler)) {
+		data->pre_handler(__irq_ino(__irq(bucket)),
+				  data->pre_handler_arg1,
+				  data->pre_handler_arg2);
 	}
-
-	while (action && action->dev_id != dev_id) {
-		pp = &action->next;
-		action = *pp;
-	}
-
-	if (likely(action))
-		*pp = action->next;
-
-	return action;
 }
 
-void free_irq(unsigned int virt_irq, void *dev_id)
-{
-	struct irqaction *action;
-	struct ino_bucket *bucket;
-	struct irq_desc *desc;
-	unsigned long flags;
-	unsigned int real_irq;
-	int ent, i;
-
-	real_irq = virt_to_real_irq(virt_irq);
-	if (unlikely(!real_irq))
-		return;
+static struct hw_interrupt_type sun4u_irq = {
+	.typename	= "sun4u",
+	.enable		= sun4u_irq_enable,
+	.disable	= sun4u_irq_disable,
+	.end		= sun4u_irq_end,
+};
 
-	spin_lock_irqsave(&irq_action_lock, flags);
+static struct hw_interrupt_type sun4u_irq_ack = {
+	.typename	= "sun4u+ack",
+	.enable		= sun4u_irq_enable,
+	.disable	= sun4u_irq_disable,
+	.ack		= run_pre_handler,
+	.end		= sun4u_irq_end,
+};
 
-	action = unlink_irq_action(virt_irq, dev_id);
+static struct hw_interrupt_type sun4v_irq = {
+	.typename	= "sun4v",
+	.enable		= sun4v_irq_enable,
+	.disable	= sun4v_irq_disable,
+	.end		= sun4v_irq_end,
+};
 
-	spin_unlock_irqrestore(&irq_action_lock, flags);
+static struct hw_interrupt_type sun4v_irq_ack = {
+	.typename	= "sun4v+ack",
+	.enable		= sun4v_irq_enable,
+	.disable	= sun4v_irq_disable,
+	.ack		= run_pre_handler,
+	.end		= sun4v_irq_end,
+};
 
-	if (unlikely(!action))
-		return;
+void irq_install_pre_handler(int virt_irq,
+			     void (*func)(unsigned int, void *, void *),
+			     void *arg1, void *arg2)
+{
+	irq_desc_t *desc = irq_desc + virt_irq;
+	struct irq_handler_data *data = desc->handler_data;
 
-	synchronize_irq(virt_irq);
+	data->pre_handler = func;
+	data->pre_handler_arg1 = arg1;
+	data->pre_handler_arg2 = arg2;
 
-	spin_lock_irqsave(&irq_action_lock, flags);
+	desc->handler = (desc->handler == &sun4u_irq ?
+			 &sun4u_irq_ack : &sun4v_irq_ack);
+}
 
-	bucket = __bucket(real_irq);
-	desc = bucket->irq_info;
+unsigned int build_irq(int inofixup, unsigned long iclr, unsigned long imap)
+{
+	struct ino_bucket *bucket;
+	struct irq_handler_data *data;
+	irq_desc_t *desc;
+	int ino;
 
-	for (i = 0; i < MAX_IRQ_DESC_ACTION; i++) {
-		struct irqaction *p = &desc->action[i];
+	BUG_ON(tlb_type == hypervisor);
 
-		if (p == action) {
-			desc->action_active_mask &= ~(1 << i);
-			break;
-		}
+	ino = (upa_readl(imap) & (IMAP_IGN | IMAP_INO)) + inofixup;
+	bucket = &ivector_table[ino];
+	if (!bucket->virt_irq) {
+		bucket->virt_irq = virt_irq_alloc(__irq(bucket));
+		irq_desc[bucket->virt_irq].handler = &sun4u_irq;
 	}
 
-	if (!desc->action_active_mask) {
-		unsigned long imap = bucket->imap;
-
-		/* This unique interrupt source is now inactive. */
-		bucket->flags &= ~IBF_ACTIVE;
-
-		/* See if any other buckets share this bucket's IMAP
-		 * and are still active.
-		 */
-		for (ent = 0; ent < NUM_IVECS; ent++) {
-			struct ino_bucket *bp = &ivector_table[ent];
-			if (bp != bucket	&&
-			    bp->imap == imap	&&
-			    (bp->flags & IBF_ACTIVE) != 0)
-				break;
-		}
+	desc = irq_desc + bucket->virt_irq;
+	if (unlikely(desc->handler_data))
+		goto out;
 
-		/* Only disable when no other sub-irq levels of
-		 * the same IMAP are active.
-		 */
-		if (ent == NUM_IVECS)
-			disable_irq(virt_irq);
+	data = kzalloc(sizeof(struct irq_handler_data), GFP_ATOMIC);
+	if (unlikely(!data)) {
+		prom_printf("IRQ: kzalloc(irq_handler_data) failed.\n");
+		prom_halt();
 	}
+	desc->handler_data = data;
 
-	spin_unlock_irqrestore(&irq_action_lock, flags);
-}
+	data->imap  = imap;
+	data->iclr  = iclr;
 
-EXPORT_SYMBOL(free_irq);
+out:
+	return bucket->virt_irq;
+}
 
-#ifdef CONFIG_SMP
-void synchronize_irq(unsigned int virt_irq)
+unsigned int sun4v_build_irq(u32 devhandle, unsigned int devino)
 {
-	unsigned int real_irq = virt_to_real_irq(virt_irq);
 	struct ino_bucket *bucket;
+	struct irq_handler_data *data;
+	unsigned long sysino;
+	irq_desc_t *desc;
 
-	if (unlikely(!real_irq))
-		return;
+	BUG_ON(tlb_type != hypervisor);
 
-	bucket = __bucket(real_irq);
-#if 0
-	/* The following is how I wish I could implement this.
-	 * Unfortunately the ICLR registers are read-only, you can
-	 * only write ICLR_foo values to them.  To get the current
-	 * IRQ status you would need to get at the IRQ diag registers
-	 * in the PCI/SBUS controller and the layout of those vary
-	 * from one controller to the next, sigh... -DaveM
-	 */
-	unsigned long iclr = bucket->iclr;
-
-	while (1) {
-		u32 tmp = upa_readl(iclr);
-		
-		if (tmp == ICLR_TRANSMIT ||
-		    tmp == ICLR_PENDING) {
-			cpu_relax();
-			continue;
-		}
-		break;
+	sysino = sun4v_devino_to_sysino(devhandle, devino);
+	bucket = &ivector_table[sysino];
+	if (!bucket->virt_irq) {
+		bucket->virt_irq = virt_irq_alloc(__irq(bucket));
+		irq_desc[bucket->virt_irq].handler = &sun4v_irq;
 	}
-#else
-	/* So we have to do this with a INPROGRESS bit just like x86.  */
-	while (bucket->flags & IBF_INPROGRESS)
-		cpu_relax();
-#endif
-}
-#endif /* CONFIG_SMP */
-
-static void process_bucket(struct ino_bucket *bp, struct pt_regs *regs)
-{
-	struct irq_desc *desc = bp->irq_info;
-	unsigned char flags = bp->flags;
-	u32 action_mask, i;
-	int random;
-
-	bp->flags |= IBF_INPROGRESS;
 
-	if (unlikely(!(flags & IBF_ACTIVE))) {
-		bp->pending = 1;
+	desc = irq_desc + bucket->virt_irq;
+	if (unlikely(desc->handler_data))
 		goto out;
-	}
-
-	if (desc->pre_handler)
-		desc->pre_handler(bp,
-				  desc->pre_handler_arg1,
-				  desc->pre_handler_arg2);
 
-	action_mask = desc->action_active_mask;
-	random = 0;
-	for (i = 0; i < MAX_IRQ_DESC_ACTION; i++) {
-		struct irqaction *p = &desc->action[i];
-		u32 mask = (1 << i);
+	data = kzalloc(sizeof(struct irq_handler_data), GFP_ATOMIC);
+	if (unlikely(!data)) {
+		prom_printf("IRQ: kzalloc(irq_handler_data) failed.\n");
+		prom_halt();
+	}
+	desc->handler_data = data;
 
-		if (!(action_mask & mask))
-			continue;
+	/* Catch accidental accesses to these things.  IMAP/ICLR handling
+	 * is done by hypervisor calls on sun4v platforms, not by direct
+	 * register accesses.
+	 */
+	data->imap = ~0UL;
+	data->iclr = ~0UL;
 
-		action_mask &= ~mask;
+out:
+	return bucket->virt_irq;
+}
 
-		if (p->handler(bp->virt_irq, p->dev_id, regs) == IRQ_HANDLED)
-			random |= p->flags;
+void hw_resend_irq(struct hw_interrupt_type *handler, unsigned int virt_irq)
+{
+	struct ino_bucket *bucket = virt_irq_to_bucket(virt_irq);
+	unsigned long pstate;
+	unsigned int *ent;
 
-		if (!action_mask)
-			break;
-	}
+	__asm__ __volatile__("rdpr %%pstate, %0" : "=r" (pstate));
+	__asm__ __volatile__("wrpr %0, %1, %%pstate"
+			     : : "r" (pstate), "i" (PSTATE_IE));
+	ent = irq_work(smp_processor_id());
+	bucket->irq_chain = *ent;
+	*ent = __irq(bucket);
+	set_softint(1 << PIL_DEVICE_IRQ);
+	__asm__ __volatile__("wrpr %0, 0x0, %%pstate" : : "r" (pstate));
+}
 
-	if (tlb_type == hypervisor) {
-		unsigned int ino = __irq_ino(bp);
-		int err;
+void ack_bad_irq(unsigned int virt_irq)
+{
+	struct ino_bucket *bucket = virt_irq_to_bucket(virt_irq);
+	unsigned int ino = 0xdeadbeef;
 
-		err = sun4v_intr_setstate(ino, HV_INTR_STATE_IDLE);
-		if (err != HV_EOK)
-			printk("sun4v_intr_setstate(%x): "
-			       "err(%d)\n", ino, err);
-	} else {
-		upa_writel(ICLR_IDLE, bp->iclr);
-	}
+	if (bucket)
+		ino = bucket - &ivector_table[0];
 
-	/* Test and add entropy */
-	if (random & SA_SAMPLE_RANDOM)
-		add_interrupt_randomness(bp->virt_irq);
-out:
-	bp->flags &= ~IBF_INPROGRESS;
+	printk(KERN_CRIT "Unexpected IRQ from ino[%x] virt_irq[%u]\n",
+	       ino, virt_irq);
 }
 
 #ifndef CONFIG_SMP
@@ -740,35 +532,33 @@ void timer_irq(int irq, struct pt_regs *regs)
 	clear_softint(clr_mask);
 
 	irq_enter();
+
 	kstat_this_cpu.irqs[0]++;
 	timer_interrupt(irq, NULL, regs);
+
 	irq_exit();
 }
 #endif
 
 void handler_irq(int irq, struct pt_regs *regs)
 {
-	struct ino_bucket *bp;
-	int cpu = smp_processor_id();
+	struct ino_bucket *bucket;
 
-	/* XXX at this point we should be able to assert that
-	 * XXX irq is PIL_DEVICE_IRQ...
-	 */
 	clear_softint(1 << irq);
 
 	irq_enter();
 
 	/* Sliiiick... */
-	bp = __bucket(xchg32(irq_work(cpu), 0));
-	while (bp) {
-		struct ino_bucket *nbp = __bucket(bp->irq_chain);
+	bucket = __bucket(xchg32(irq_work(smp_processor_id()), 0));
+	while (bucket) {
+		struct ino_bucket *next = __bucket(bucket->irq_chain);
 
-		kstat_this_cpu.irqs[bp->virt_irq]++;
+		bucket->irq_chain = 0;
+		__do_IRQ(bucket->virt_irq, regs);
 
-		bp->irq_chain = 0;
-		process_bucket(bp, regs);
-		bp = nbp;
+		bucket = next;
 	}
+
 	irq_exit();
 }
 
@@ -833,74 +623,6 @@ main_interrupt:
 EXPORT_SYMBOL(sparc_floppy_irq);
 #endif
 
-/* We really don't need these at all on the Sparc.  We only have
- * stubs here because they are exported to modules.
- */
-unsigned long probe_irq_on(void)
-{
-	return 0;
-}
-
-EXPORT_SYMBOL(probe_irq_on);
-
-int probe_irq_off(unsigned long mask)
-{
-	return 0;
-}
-
-EXPORT_SYMBOL(probe_irq_off);
-
-#ifdef CONFIG_SMP
-static int retarget_one_irq(struct irqaction *p, int goal_cpu)
-{
-	struct ino_bucket *bucket = get_ino_in_irqaction(p) + ivector_table;
-
-	while (!cpu_online(goal_cpu)) {
-		if (++goal_cpu >= NR_CPUS)
-			goal_cpu = 0;
-	}
-
-	if (tlb_type == hypervisor) {
-		unsigned int ino = __irq_ino(bucket);
-
-		sun4v_intr_settarget(ino, goal_cpu);
-		sun4v_intr_setenabled(ino, HV_INTR_ENABLED);
-	} else {
-		unsigned long imap = bucket->imap;
-		unsigned int tid = sun4u_compute_tid(imap, goal_cpu);
-
-		upa_writel(tid | IMAP_VALID, imap);
-	}
-
-	do {
-		if (++goal_cpu >= NR_CPUS)
-			goal_cpu = 0;
-	} while (!cpu_online(goal_cpu));
-
-	return goal_cpu;
-}
-
-/* Called from request_irq. */
-static void distribute_irqs(void)
-{
-	unsigned long flags;
-	int cpu, level;
-
-	spin_lock_irqsave(&irq_action_lock, flags);
-	cpu = 0;
-
-	for (level = 1; level < NR_IRQS; level++) {
-		struct irqaction *p = irq_action[level];
-
-		while(p) {
-			cpu = retarget_one_irq(p, cpu);
-			p = p->next;
-		}
-	}
-	spin_unlock_irqrestore(&irq_action_lock, flags);
-}
-#endif
-
 struct sun5_timer {
 	u64	count0;
 	u64	limit0;
@@ -1076,6 +798,10 @@ void __cpuinit sun4v_init_mondo_queues(int use_bootmem, int cpu, int alloc, int
 	}
 }
 
+static struct irqaction timer_irq_action = {
+	.name = "timer",
+};
+
 /* Only invoked on boot processor. */
 void __init init_IRQ(void)
 {
@@ -1103,121 +829,6 @@ void __init init_IRQ(void)
 			     : /* No outputs */
 			     : "i" (PSTATE_IE)
 			     : "g1");
-}
 
-static struct proc_dir_entry *root_irq_dir;
-static struct proc_dir_entry *irq_dir[NR_IRQS];
-
-#ifdef CONFIG_SMP
-
-static int irq_affinity_read_proc(char *page, char **start, off_t off,
-				  int count, int *eof, void *data)
-{
-	struct ino_bucket *bp = ivector_table + (long)data;
-	struct irq_desc *desc = bp->irq_info;
-	struct irqaction *ap = desc->action;
-	cpumask_t mask;
-	int len;
-
-	mask = get_smpaff_in_irqaction(ap);
-	if (cpus_empty(mask))
-		mask = cpu_online_map;
-
-	len = cpumask_scnprintf(page, count, mask);
-	if (count - len < 2)
-		return -EINVAL;
-	len += sprintf(page + len, "\n");
-	return len;
+	irq_desc[0].action = &timer_irq_action;
 }
-
-static inline void set_intr_affinity(int virt_irq, cpumask_t hw_aff)
-{
-	struct ino_bucket *bp;
-	struct irq_desc *desc;
-	struct irqaction *ap;
-	unsigned int real_irq;
-
-	real_irq = virt_to_real_irq(virt_irq);
-	if (unlikely(!real_irq))
-		return;
-
-	bp = __bucket(real_irq);
-	desc = bp->irq_info;
-	ap = desc->action;
-
-	/* Users specify affinity in terms of hw cpu ids.
-	 * As soon as we do this, handler_irq() might see and take action.
-	 */
-	put_smpaff_in_irqaction(ap, hw_aff);
-
-	/* Migration is simply done by the next cpu to service this
-	 * interrupt.
-	 *
-	 * XXX Broken, this doesn't happen anymore...
-	 */
-}
-
-static int irq_affinity_write_proc(struct file *file,
-				   const char __user *buffer,
-				   unsigned long count, void *data)
-{
-	int virt_irq = (long) data, full_count = count, err;
-	cpumask_t new_value;
-
-	err = cpumask_parse(buffer, count, new_value);
-
-	/*
-	 * Do not allow disabling IRQs completely - it's a too easy
-	 * way to make the system unusable accidentally :-) At least
-	 * one online CPU still has to be targeted.
-	 */
-	cpus_and(new_value, new_value, cpu_online_map);
-	if (cpus_empty(new_value))
-		return -EINVAL;
-
-	set_intr_affinity(virt_irq, new_value);
-
-	return full_count;
-}
-
-#endif
-
-#define MAX_NAMELEN 10
-
-static void register_irq_proc(unsigned int virt_irq)
-{
-	char name [MAX_NAMELEN];
-
-	if (!root_irq_dir || irq_dir[virt_irq])
-		return;
-
-	memset(name, 0, MAX_NAMELEN);
-	sprintf(name, "%d", virt_irq);
-
-	/* create /proc/irq/1234 */
-	irq_dir[virt_irq] = proc_mkdir(name, root_irq_dir);
-
-#ifdef CONFIG_SMP
-	/* XXX SMP affinity not supported on starfire yet. */
-	if (this_is_starfire == 0) {
-		struct proc_dir_entry *entry;
-
-		/* create /proc/irq/1234/smp_affinity */
-		entry = create_proc_entry("smp_affinity", 0600, irq_dir[irq]);
-
-		if (entry) {
-			entry->nlink = 1;
-			entry->data = (void *)(long)virt_irq;
-			entry->read_proc = irq_affinity_read_proc;
-			entry->write_proc = irq_affinity_write_proc;
-		}
-	}
-#endif
-}
-
-void init_irq_proc(void)
-{
-	/* create /proc/irq */
-	root_irq_dir = proc_mkdir("irq", NULL);
-}
-
diff --git a/arch/sparc64/kernel/pci.c b/arch/sparc64/kernel/pci.c
index f97ddeb105a..9472580a431 100644
--- a/arch/sparc64/kernel/pci.c
+++ b/arch/sparc64/kernel/pci.c
@@ -47,12 +47,6 @@ struct pci_controller_info *pci_controller_root = NULL;
 /* Each PCI controller found gets a unique index. */
 int pci_num_controllers = 0;
 
-/* At boot time the user can give the kernel a command
- * line option which controls if and how PCI devices
- * are reordered at PCI bus probing time.
- */
-int pci_device_reorder = 0;
-
 volatile int pci_poke_in_progress;
 volatile int pci_poke_cpu = -1;
 volatile int pci_poke_faulted;
@@ -316,27 +310,6 @@ static void __init pci_scan_each_controller_bus(void)
 		p->scan_bus(p);
 }
 
-/* Reorder the pci_dev chain, so that onboard devices come first
- * and then come the pluggable cards.
- */
-static void __init pci_reorder_devs(void)
-{
-	struct list_head *pci_onboard = &pci_devices;
-	struct list_head *walk = pci_onboard->next;
-
-	while (walk != pci_onboard) {
-		struct pci_dev *pdev = pci_dev_g(walk);
-		struct list_head *walk_next = walk->next;
-
-		if (pdev->irq && (__irq_ino(pdev->irq) & 0x20)) {
-			list_del(walk);
-			list_add(walk, pci_onboard);
-		}
-
-		walk = walk_next;
-	}
-}
-
 extern void clock_probe(void);
 extern void power_init(void);
 
@@ -348,9 +321,6 @@ static int __init pcibios_init(void)
 
 	pci_scan_each_controller_bus();
 
-	if (pci_device_reorder)
-		pci_reorder_devs();
-
 	isa_init();
 	ebus_init();
 	clock_probe();
@@ -441,14 +411,6 @@ EXPORT_SYMBOL(pcibios_bus_to_resource);
 
 char * __init pcibios_setup(char *str)
 {
-	if (!strcmp(str, "onboardfirst")) {
-		pci_device_reorder = 1;
-		return NULL;
-	}
-	if (!strcmp(str, "noreorder")) {
-		pci_device_reorder = 0;
-		return NULL;
-	}
 	return str;
 }
 
diff --git a/arch/sparc64/kernel/pci_psycho.c b/arch/sparc64/kernel/pci_psycho.c
index f2d1097f541..24db22aa972 100644
--- a/arch/sparc64/kernel/pci_psycho.c
+++ b/arch/sparc64/kernel/pci_psycho.c
@@ -308,7 +308,7 @@ static unsigned int psycho_irq_build(struct pci_pbm_info *pbm,
 	if ((ino & 0x20) == 0)
 		inofixup = ino & 0x03;
 
-	return build_irq(inofixup, iclr, imap, IBF_PCI);
+	return build_irq(inofixup, iclr, imap);
 }
 
 /* PSYCHO error handling support. */
diff --git a/arch/sparc64/kernel/pci_sabre.c b/arch/sparc64/kernel/pci_sabre.c
index 846c1205aa9..b7d997b55f0 100644
--- a/arch/sparc64/kernel/pci_sabre.c
+++ b/arch/sparc64/kernel/pci_sabre.c
@@ -530,7 +530,7 @@ static unsigned long __onboard_imap_off[] = {
  * side of the non-APB bridge, then perform a read of Sabre's DMA
  * write-sync register.
  */
-static void sabre_wsync_handler(struct ino_bucket *bucket, void *_arg1, void *_arg2)
+static void sabre_wsync_handler(unsigned int ino, void *_arg1, void *_arg2)
 {
 	struct pci_dev *pdev = _arg1;
 	unsigned long sync_reg = (unsigned long) _arg2;
@@ -573,7 +573,7 @@ static unsigned int sabre_irq_build(struct pci_pbm_info *pbm,
 	if ((ino & 0x20) == 0)
 		inofixup = ino & 0x03;
 
-	virt_irq = build_irq(inofixup, iclr, imap, IBF_PCI);
+	virt_irq = build_irq(inofixup, iclr, imap);
 
 	if (pdev) {
 		struct pcidev_cookie *pcp = pdev->sysdata;
diff --git a/arch/sparc64/kernel/pci_schizo.c b/arch/sparc64/kernel/pci_schizo.c
index 0c400b5fa5b..cc662e915d3 100644
--- a/arch/sparc64/kernel/pci_schizo.c
+++ b/arch/sparc64/kernel/pci_schizo.c
@@ -232,10 +232,10 @@ static unsigned long schizo_iclr_offset(unsigned long ino)
 	return SCHIZO_ICLR_BASE + (ino * 8UL);
 }
 
-static void tomatillo_wsync_handler(struct ino_bucket *bucket, void *_arg1, void *_arg2)
+static void tomatillo_wsync_handler(unsigned int ino, void *_arg1, void *_arg2)
 {
 	unsigned long sync_reg = (unsigned long) _arg2;
-	u64 mask = 1UL << (__irq_ino(__irq(bucket)) & IMAP_INO);
+	u64 mask = 1UL << (ino & IMAP_INO);
 	u64 val;
 	int limit;
 
@@ -313,7 +313,7 @@ static unsigned int schizo_irq_build(struct pci_pbm_info *pbm,
 			ign_fixup = (1 << 6);
 	}
 
-	virt_irq = build_irq(ign_fixup, iclr, imap, IBF_PCI);
+	virt_irq = build_irq(ign_fixup, iclr, imap);
 
 	if (pdev && pbm->chip_type == PBM_CHIP_TYPE_TOMATILLO) {
 		irq_install_pre_handler(virt_irq,
diff --git a/arch/sparc64/kernel/pci_sun4v.c b/arch/sparc64/kernel/pci_sun4v.c
index b97c81ba883..5419480edf4 100644
--- a/arch/sparc64/kernel/pci_sun4v.c
+++ b/arch/sparc64/kernel/pci_sun4v.c
@@ -844,7 +844,7 @@ static unsigned int pci_sun4v_irq_build(struct pci_pbm_info *pbm,
 {
 	u32 devhandle = pbm->devhandle;
 
-	return sun4v_build_irq(devhandle, devino, IBF_PCI);
+	return sun4v_build_irq(devhandle, devino);
 }
 
 static void pci_sun4v_base_address_update(struct pci_dev *pdev, int resource)
diff --git a/arch/sparc64/kernel/sbus.c b/arch/sparc64/kernel/sbus.c
index 5544cf5d38b..8812417247d 100644
--- a/arch/sparc64/kernel/sbus.c
+++ b/arch/sparc64/kernel/sbus.c
@@ -821,7 +821,7 @@ unsigned int sbus_build_irq(void *buscookie, unsigned int ino)
 
 		iclr += ((unsigned long)sbus_level - 1UL) * 8UL;
 	}
-	return build_irq(sbus_level, iclr, imap, 0);
+	return build_irq(sbus_level, iclr, imap);
 }
 
 /* Error interrupt handling. */
diff --git a/arch/sparc64/kernel/sparc64_ksyms.c b/arch/sparc64/kernel/sparc64_ksyms.c
index 38e569f786d..af72bf5c3db 100644
--- a/arch/sparc64/kernel/sparc64_ksyms.c
+++ b/arch/sparc64/kernel/sparc64_ksyms.c
@@ -175,10 +175,6 @@ EXPORT_SYMBOL(set_bit);
 EXPORT_SYMBOL(clear_bit);
 EXPORT_SYMBOL(change_bit);
 
-EXPORT_SYMBOL(ivector_table);
-EXPORT_SYMBOL(enable_irq);
-EXPORT_SYMBOL(disable_irq);
-
 EXPORT_SYMBOL(__flushw_user);
 
 EXPORT_SYMBOL(tlb_type);
diff --git a/arch/sparc64/kernel/sun4v_ivec.S b/arch/sparc64/kernel/sun4v_ivec.S
index f70e4774649..49703c3c576 100644
--- a/arch/sparc64/kernel/sun4v_ivec.S
+++ b/arch/sparc64/kernel/sun4v_ivec.S
@@ -103,7 +103,7 @@ sun4v_dev_mondo:
 
 	/* Get &ivector_table[IVEC] into %g4.  */
 	sethi	%hi(ivector_table), %g4
-	sllx	%g3, 5, %g3
+	sllx	%g3, 3, %g3
 	or	%g4, %lo(ivector_table), %g4
 	add	%g4, %g3, %g4