[SPARC64]: Move over to GENERIC_HARDIRQS.

This is the long overdue conversion of sparc64 over to
the generic IRQ layer.

The kernel image is slightly larger, but the BSS is ~60K
smaller due to the reduced size of struct ino_bucket.

A lot of IRQ implementation details, including ino_bucket,
were moved out of asm-sparc64/irq.h and are now private to
arch/sparc64/kernel/irq.c, and most of the code in irq.c
totally disappeared.

One thing that's different at the moment is IRQ distribution,
we do it at enable_irq() time.  If the cpu mask is ALL then
we round-robin using a global rotating cpu counter, else
we pick the first cpu in the mask to support single cpu
targetting.  This is similar to what powerpc's XICS IRQ
support code does.

This works fine on my UP SB1000, and the SMP build goes
fine and runs on that machine, but lots of testing on
different setups is needed.

Signed-off-by: David S. Miller <davem@davemloft.net>

15 files changed, 305 insertions, 802 deletions

diff --git a/arch/sparc64/Kconfig b/arch/sparc64/Kconfig
index 43a66f5407f..a7a111db25b 100644
--- a/arch/sparc64/Kconfig
+++ b/arch/sparc64/Kconfig
@@ -87,6 +87,10 @@ config SYSVIPC_COMPAT
 	depends on COMPAT && SYSVIPC
 	default y
 
+config GENERIC_HARDIRQS
+	bool
+	default y
+
 menu "General machine setup"
 
 config SMP
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
 
diff --git a/include/asm-sparc64/hardirq.h b/include/asm-sparc64/hardirq.h
index f0cf71376ec..7c29fd1a87a 100644
--- a/include/asm-sparc64/hardirq.h
+++ b/include/asm-sparc64/hardirq.h
@@ -12,6 +12,8 @@
 #define local_softirq_pending() \
 	(local_cpu_data().__softirq_pending)
 
+void ack_bad_irq(unsigned int irq);
+
 #define HARDIRQ_BITS	8
 
 #endif /* !(__SPARC64_HARDIRQ_H) */
diff --git a/include/asm-sparc64/hw_irq.h b/include/asm-sparc64/hw_irq.h
index 153cae2ddae..599b3b07345 100644
--- a/include/asm-sparc64/hw_irq.h
+++ b/include/asm-sparc64/hw_irq.h
@@ -1,6 +1,6 @@
 #ifndef __ASM_SPARC64_HW_IRQ_H
 #define __ASM_SPARC64_HW_IRQ_H
 
-/* Dummy include. */
+extern void hw_resend_irq(struct hw_interrupt_type *handler, unsigned int virt_irq);
 
 #endif
diff --git a/include/asm-sparc64/irq.h b/include/asm-sparc64/irq.h
index 9edcd90495f..77a4f63cba7 100644
--- a/include/asm-sparc64/irq.h
+++ b/include/asm-sparc64/irq.h
@@ -16,58 +16,6 @@
 #include <asm/pil.h>
 #include <asm/ptrace.h>
 
-struct ino_bucket;
-
-#define MAX_IRQ_DESC_ACTION	4
-
-struct irq_desc {
-	void			(*pre_handler)(struct ino_bucket *, void *, void *);
-	void			*pre_handler_arg1;
-	void			*pre_handler_arg2;
-	u32			action_active_mask;
-	struct irqaction	action[MAX_IRQ_DESC_ACTION];
-};
-
-/* You should not mess with this directly. That's the job of irq.c.
- *
- * If you make changes here, please update hand coded assembler of
- * the vectored interrupt trap handler in entry.S -DaveM
- *
- * This is currently one DCACHE line, two buckets per L2 cache
- * line.  Keep this in mind please.
- */
-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 char virt_irq;
-
-	/* If an IVEC arrives while irq_info is NULL, we
-	 * set this to notify request_irq() about the event.
-	 */
-/*0x05*/unsigned char pending;
-
-	/* Miscellaneous flags. */
-/*0x06*/unsigned char flags;
-
-	/* Currently unused.  */
-/*0x07*/unsigned char __pad;
-
-	/* Reference to IRQ descriptor for this bucket. */
-/*0x08*/struct irq_desc *irq_info;
-
-	/* Sun5 Interrupt Clear Register. */
-/*0x10*/unsigned long iclr;
-
-	/* Sun5 Interrupt Mapping Register. */
-/*0x18*/unsigned long imap;
-
-};
-
 /* IMAP/ICLR register defines */
 #define IMAP_VALID		0x80000000	/* IRQ Enabled		*/
 #define IMAP_TID_UPA		0x7c000000	/* UPA TargetID		*/
@@ -85,19 +33,6 @@ struct ino_bucket {
 #define ICLR_TRANSMIT		0x00000001	/* Transmit state	*/
 #define ICLR_PENDING		0x00000003	/* Pending state	*/
 
-/* Only 8-bits are available, be careful.  -DaveM */
-#define IBF_PCI		0x02	/* PSYCHO/SABRE/SCHIZO PCI interrupt.	 */
-#define IBF_ACTIVE	0x04	/* Interrupt is active and has a handler.*/
-#define IBF_INPROGRESS	0x10	/* IRQ is being serviced.		 */
-
-#define NUM_IVECS	(IMAP_INR + 1)
-extern struct ino_bucket ivector_table[NUM_IVECS];
-
-#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))
-
 /* The largest number of unique interrupt sources we support.
  * If this needs to ever be larger than 255, you need to change
  * the type of ino_bucket->virt_irq as appropriate.
@@ -107,14 +42,11 @@ extern struct ino_bucket ivector_table[NUM_IVECS];
 #define NR_IRQS    255
 
 extern void irq_install_pre_handler(int virt_irq,
-				    void (*func)(struct ino_bucket *, void *, void *),
+				    void (*func)(unsigned int, void *, void *),
 				    void *arg1, void *arg2);
 #define irq_canonicalize(irq)	(irq)
-extern void disable_irq(unsigned int);
-#define disable_irq_nosync disable_irq
-extern void enable_irq(unsigned int);
-extern unsigned int build_irq(int inofixup, unsigned long iclr, unsigned long imap, unsigned char flags);
-extern unsigned int sun4v_build_irq(u32 devhandle, unsigned int devino, unsigned char flags);
+extern unsigned int build_irq(int inofixup, unsigned long iclr, unsigned long imap);
+extern unsigned int sun4v_build_irq(u32 devhandle, unsigned int devino);
 extern unsigned int sbus_build_irq(void *sbus, unsigned int ino);
 
 static __inline__ void set_softint(unsigned long bits)
@@ -140,8 +72,4 @@ static __inline__ unsigned long get_softint(void)
 	return retval;
 }
 
-struct irqaction;
-struct pt_regs;
-int handle_IRQ_event(unsigned int, struct pt_regs *, struct irqaction *);
-
 #endif