diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig
index e560d10..63a027c 100644
--- a/arch/sparc/Kconfig
+++ b/arch/sparc/Kconfig
@@ -25,6 +25,10 @@
 	select HAVE_DMA_ATTRS
 	select HAVE_DMA_API_DEBUG
 	select HAVE_ARCH_JUMP_LABEL
+	select HAVE_GENERIC_HARDIRQS
+	select GENERIC_HARDIRQS_NO_DEPRECATED
+	select GENERIC_IRQ_SHOW
+	select USE_GENERIC_SMP_HELPERS if SMP
 
 config SPARC32
 	def_bool !64BIT
@@ -43,15 +47,12 @@
 	select HAVE_DYNAMIC_FTRACE
 	select HAVE_FTRACE_MCOUNT_RECORD
 	select HAVE_SYSCALL_TRACEPOINTS
-	select USE_GENERIC_SMP_HELPERS if SMP
 	select RTC_DRV_CMOS
 	select RTC_DRV_BQ4802
 	select RTC_DRV_SUN4V
 	select RTC_DRV_STARFIRE
 	select HAVE_PERF_EVENTS
 	select PERF_USE_VMALLOC
-	select HAVE_GENERIC_HARDIRQS
-	select GENERIC_IRQ_SHOW
 	select IRQ_PREFLOW_FASTEOI
 
 config ARCH_DEFCONFIG
diff --git a/arch/sparc/include/asm/cpudata_32.h b/arch/sparc/include/asm/cpudata_32.h
index 31d48a0..a4c5a93 100644
--- a/arch/sparc/include/asm/cpudata_32.h
+++ b/arch/sparc/include/asm/cpudata_32.h
@@ -16,6 +16,10 @@
 	unsigned long clock_tick;
 	unsigned int multiplier;
 	unsigned int counter;
+#ifdef CONFIG_SMP
+	unsigned int irq_resched_count;
+	unsigned int irq_call_count;
+#endif
 	int prom_node;
 	int mid;
 	int next;
@@ -23,5 +27,6 @@
 
 DECLARE_PER_CPU(cpuinfo_sparc, __cpu_data);
 #define cpu_data(__cpu) per_cpu(__cpu_data, (__cpu))
+#define local_cpu_data() __get_cpu_var(__cpu_data)
 
 #endif /* _SPARC_CPUDATA_H */
diff --git a/arch/sparc/include/asm/floppy_32.h b/arch/sparc/include/asm/floppy_32.h
index 86666f7..482c79e 100644
--- a/arch/sparc/include/asm/floppy_32.h
+++ b/arch/sparc/include/asm/floppy_32.h
@@ -281,28 +281,27 @@
 	pdma_areasize = pdma_size;
 }
 
-/* Our low-level entry point in arch/sparc/kernel/entry.S */
-extern int sparc_floppy_request_irq(int irq, unsigned long flags,
-				    irq_handler_t irq_handler);
+extern int sparc_floppy_request_irq(unsigned int irq,
+                                    irq_handler_t irq_handler);
 
 static int sun_fd_request_irq(void)
 {
 	static int once = 0;
-	int error;
 
-	if(!once) {
+	if (!once) {
 		once = 1;
-		error = sparc_floppy_request_irq(FLOPPY_IRQ,
-						 IRQF_DISABLED,
-						 floppy_interrupt);
-		return ((error == 0) ? 0 : -1);
-	} else return 0;
+		return sparc_floppy_request_irq(FLOPPY_IRQ, floppy_interrupt);
+	} else {
+		return 0;
+	}
 }
 
 static struct linux_prom_registers fd_regs[2];
 
 static int sun_floppy_init(void)
 {
+	struct platform_device *op;
+	struct device_node *dp;
 	char state[128];
 	phandle tnode, fd_node;
 	int num_regs;
@@ -310,7 +309,6 @@
 
 	use_virtual_dma = 1;
 
-	FLOPPY_IRQ = 11;
 	/* Forget it if we aren't on a machine that could possibly
 	 * ever have a floppy drive.
 	 */
@@ -349,6 +347,26 @@
 	sun_fdc = (struct sun_flpy_controller *)
 	    of_ioremap(&r, 0, fd_regs[0].reg_size, "floppy");
 
+	/* Look up irq in platform_device.
+	 * We try "SUNW,fdtwo" and "fd"
+	 */
+	for_each_node_by_name(dp, "SUNW,fdtwo") {
+		op = of_find_device_by_node(dp);
+		if (op)
+			break;
+	}
+	if (!op) {
+		for_each_node_by_name(dp, "fd") {
+			op = of_find_device_by_node(dp);
+			if (op)
+				break;
+		}
+	}
+	if (!op)
+		goto no_sun_fdc;
+
+	FLOPPY_IRQ = op->archdata.irqs[0];
+
 	/* Last minute sanity check... */
 	if(sun_fdc->status_82072 == 0xff) {
 		sun_fdc = NULL;
diff --git a/arch/sparc/include/asm/io.h b/arch/sparc/include/asm/io.h
index a34b299..f6902cf 100644
--- a/arch/sparc/include/asm/io.h
+++ b/arch/sparc/include/asm/io.h
@@ -5,4 +5,17 @@
 #else
 #include <asm/io_32.h>
 #endif
+
+/*
+ * Defines used for both SPARC32 and SPARC64
+ */
+
+/* Big endian versions of memory read/write routines */
+#define readb_be(__addr)	__raw_readb(__addr)
+#define readw_be(__addr)	__raw_readw(__addr)
+#define readl_be(__addr)	__raw_readl(__addr)
+#define writeb_be(__b, __addr)	__raw_writeb(__b, __addr)
+#define writel_be(__w, __addr)	__raw_writel(__w, __addr)
+#define writew_be(__l, __addr)	__raw_writew(__l, __addr)
+
 #endif
diff --git a/arch/sparc/include/asm/irq_32.h b/arch/sparc/include/asm/irq_32.h
index eced3e3..2ae3aca 100644
--- a/arch/sparc/include/asm/irq_32.h
+++ b/arch/sparc/include/asm/irq_32.h
@@ -6,7 +6,11 @@
 #ifndef _SPARC_IRQ_H
 #define _SPARC_IRQ_H
 
-#define NR_IRQS    16
+/* Allocated number of logical irq numbers.
+ * sun4d boxes (ss2000e) should be OK with ~32.
+ * Be on the safe side and make room for 64
+ */
+#define NR_IRQS    64
 
 #include <linux/interrupt.h>
 
diff --git a/arch/sparc/include/asm/leon.h b/arch/sparc/include/asm/leon.h
index c04f96f..6bdaf1e 100644
--- a/arch/sparc/include/asm/leon.h
+++ b/arch/sparc/include/asm/leon.h
@@ -52,29 +52,6 @@
 #define LEON_DIAGF_VALID	0x2000
 #define LEON_DIAGF_VALID_SHIFT	13
 
-/*
- *  Interrupt Sources
- *
- *  The interrupt source numbers directly map to the trap type and to
- *  the bits used in the Interrupt Clear, Interrupt Force, Interrupt Mask,
- *  and the Interrupt Pending Registers.
- */
-#define LEON_INTERRUPT_CORRECTABLE_MEMORY_ERROR	1
-#define LEON_INTERRUPT_UART_1_RX_TX		2
-#define LEON_INTERRUPT_UART_0_RX_TX		3
-#define LEON_INTERRUPT_EXTERNAL_0		4
-#define LEON_INTERRUPT_EXTERNAL_1		5
-#define LEON_INTERRUPT_EXTERNAL_2		6
-#define LEON_INTERRUPT_EXTERNAL_3		7
-#define LEON_INTERRUPT_TIMER1			8
-#define LEON_INTERRUPT_TIMER2			9
-#define LEON_INTERRUPT_EMPTY1			10
-#define LEON_INTERRUPT_EMPTY2			11
-#define LEON_INTERRUPT_OPEN_ETH			12
-#define LEON_INTERRUPT_EMPTY4			13
-#define LEON_INTERRUPT_EMPTY5			14
-#define LEON_INTERRUPT_EMPTY6			15
-
 /* irq masks */
 #define LEON_HARD_INT(x)	(1 << (x))	/* irq 0-15 */
 #define LEON_IRQMASK_R		0x0000fffe	/* bit 15- 1 of lregs.irqmask */
@@ -183,7 +160,6 @@
 /* macro access for leon_readnobuffer_reg() */
 #define LEON_BYPASSCACHE_LOAD_VA(x) leon_readnobuffer_reg((unsigned long)(x))
 
-extern void sparc_leon_eirq_register(int eirq);
 extern void leon_init(void);
 extern void leon_switch_mm(void);
 extern void leon_init_IRQ(void);
@@ -239,8 +215,8 @@
 #endif /*!__ASSEMBLY__*/
 
 #ifdef CONFIG_SMP
-# define LEON3_IRQ_RESCHEDULE		13
-# define LEON3_IRQ_TICKER		(leon_percpu_timer_dev[0].irq)
+# define LEON3_IRQ_IPI_DEFAULT		13
+# define LEON3_IRQ_TICKER		(leon3_ticker_irq)
 # define LEON3_IRQ_CROSS_CALL		15
 #endif
 
@@ -339,9 +315,9 @@
 #include <linux/interrupt.h>
 
 struct device_node;
-extern int sparc_leon_eirq_get(int eirq, int cpu);
-extern irqreturn_t sparc_leon_eirq_isr(int dummy, void *dev_id);
-extern void sparc_leon_eirq_register(int eirq);
+extern unsigned int leon_build_device_irq(unsigned int real_irq,
+					   irq_flow_handler_t flow_handler,
+					   const char *name, int do_ack);
 extern void leon_clear_clock_irq(void);
 extern void leon_load_profile_irq(int cpu, unsigned int limit);
 extern void leon_init_timers(irq_handler_t counter_fn);
@@ -358,6 +334,7 @@
 extern int leon_flush_needed(void);
 extern void leon_switch_mm(void);
 extern int srmmu_swprobe_trace;
+extern int leon3_ticker_irq;
 
 #ifdef CONFIG_SMP
 extern int leon_smp_nrcpus(void);
@@ -366,17 +343,19 @@
 extern void leon_boot_cpus(void);
 extern int leon_boot_one_cpu(int i);
 void leon_init_smp(void);
-extern void cpu_probe(void);
 extern void cpu_idle(void);
 extern void init_IRQ(void);
 extern void cpu_panic(void);
 extern int __leon_processor_id(void);
 void leon_enable_irq_cpu(unsigned int irq_nr, unsigned int cpu);
+extern irqreturn_t leon_percpu_timer_interrupt(int irq, void *unused);
 
-extern unsigned int real_irq_entry[], smpleon_ticker[];
+extern unsigned int real_irq_entry[];
+extern unsigned int smpleon_ipi[];
 extern unsigned int patchme_maybe_smp_msg[];
 extern unsigned int t_nmi[], linux_trap_ipi15_leon[];
 extern unsigned int linux_trap_ipi15_sun4m[];
+extern int leon_ipi_irq;
 
 #endif /* CONFIG_SMP */
 
diff --git a/arch/sparc/include/asm/pcic.h b/arch/sparc/include/asm/pcic.h
index f20ef56..7eb5d78 100644
--- a/arch/sparc/include/asm/pcic.h
+++ b/arch/sparc/include/asm/pcic.h
@@ -29,11 +29,17 @@
 	int			pcic_imdim;
 };
 
-extern int pcic_probe(void);
-/* Erm... MJ redefined pcibios_present() so that it does not work early. */
+#ifdef CONFIG_PCI
 extern int pcic_present(void);
+extern int pcic_probe(void);
+extern void pci_time_init(void);
 extern void sun4m_pci_init_IRQ(void);
-
+#else
+static inline int pcic_present(void) { return 0; }
+static inline int pcic_probe(void) { return 0; }
+static inline void pci_time_init(void) {}
+static inline void sun4m_pci_init_IRQ(void) {}
+#endif
 #endif
 
 /* Size of PCI I/O space which we relocate. */
diff --git a/arch/sparc/include/asm/pgtable_32.h b/arch/sparc/include/asm/pgtable_32.h
index 303bd4d..5b31a8e 100644
--- a/arch/sparc/include/asm/pgtable_32.h
+++ b/arch/sparc/include/asm/pgtable_32.h
@@ -8,6 +8,8 @@
  *  Copyright (C) 1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
  */
 
+#include <linux/const.h>
+
 #ifndef __ASSEMBLY__
 #include <asm-generic/4level-fixup.h>
 
@@ -456,9 +458,9 @@
 
 #endif /* !(__ASSEMBLY__) */
 
-#define VMALLOC_START           0xfe600000
+#define VMALLOC_START           _AC(0xfe600000,UL)
 /* XXX Alter this when I get around to fixing sun4c - Anton */
-#define VMALLOC_END             0xffc00000
+#define VMALLOC_END             _AC(0xffc00000,UL)
 
 
 /* We provide our own get_unmapped_area to cope with VA holes for userland */
diff --git a/arch/sparc/include/asm/pgtable_64.h b/arch/sparc/include/asm/pgtable_64.h
index f8dddb7..b77128c 100644
--- a/arch/sparc/include/asm/pgtable_64.h
+++ b/arch/sparc/include/asm/pgtable_64.h
@@ -699,6 +699,9 @@
 extern void paging_init(void);
 extern unsigned long find_ecache_flush_span(unsigned long size);
 
+struct seq_file;
+extern void mmu_info(struct seq_file *);
+
 /* These do nothing with the way I have things setup. */
 #define mmu_lockarea(vaddr, len)		(vaddr)
 #define mmu_unlockarea(vaddr, len)		do { } while(0)
diff --git a/arch/sparc/include/asm/setup.h b/arch/sparc/include/asm/setup.h
index 2643c62..64718ba 100644
--- a/arch/sparc/include/asm/setup.h
+++ b/arch/sparc/include/asm/setup.h
@@ -11,4 +11,16 @@
 # define COMMAND_LINE_SIZE 256
 #endif
 
+#ifdef __KERNEL__
+
+#ifdef CONFIG_SPARC32
+/* The CPU that was used for booting
+ * Only sun4d + leon may have boot_cpu_id != 0
+ */
+extern unsigned char boot_cpu_id;
+extern unsigned char boot_cpu_id4;
+#endif
+
+#endif /* __KERNEL__ */
+
 #endif /* _SPARC_SETUP_H */
diff --git a/arch/sparc/include/asm/smp_32.h b/arch/sparc/include/asm/smp_32.h
index d82d7f4..093f108 100644
--- a/arch/sparc/include/asm/smp_32.h
+++ b/arch/sparc/include/asm/smp_32.h
@@ -50,42 +50,38 @@
 void smp_boot_cpus(void);
 void smp_store_cpu_info(int);
 
+void smp_resched_interrupt(void);
+void smp_call_function_single_interrupt(void);
+void smp_call_function_interrupt(void);
+
 struct seq_file;
 void smp_bogo(struct seq_file *);
 void smp_info(struct seq_file *);
 
 BTFIXUPDEF_CALL(void, smp_cross_call, smpfunc_t, cpumask_t, unsigned long, unsigned long, unsigned long, unsigned long)
 BTFIXUPDEF_CALL(int, __hard_smp_processor_id, void)
+BTFIXUPDEF_CALL(void, smp_ipi_resched, int);
+BTFIXUPDEF_CALL(void, smp_ipi_single, int);
+BTFIXUPDEF_CALL(void, smp_ipi_mask_one, int);
 BTFIXUPDEF_BLACKBOX(hard_smp_processor_id)
 BTFIXUPDEF_BLACKBOX(load_current)
 
 #define smp_cross_call(func,mask,arg1,arg2,arg3,arg4) BTFIXUP_CALL(smp_cross_call)(func,mask,arg1,arg2,arg3,arg4)
 
-static inline void xc0(smpfunc_t func) { smp_cross_call(func, cpu_online_map, 0, 0, 0, 0); }
+static inline void xc0(smpfunc_t func) { smp_cross_call(func, *cpu_online_mask, 0, 0, 0, 0); }
 static inline void xc1(smpfunc_t func, unsigned long arg1)
-{ smp_cross_call(func, cpu_online_map, arg1, 0, 0, 0); }
+{ smp_cross_call(func, *cpu_online_mask, arg1, 0, 0, 0); }
 static inline void xc2(smpfunc_t func, unsigned long arg1, unsigned long arg2)
-{ smp_cross_call(func, cpu_online_map, arg1, arg2, 0, 0); }
+{ smp_cross_call(func, *cpu_online_mask, arg1, arg2, 0, 0); }
 static inline void xc3(smpfunc_t func, unsigned long arg1, unsigned long arg2,
 			   unsigned long arg3)
-{ smp_cross_call(func, cpu_online_map, arg1, arg2, arg3, 0); }
+{ smp_cross_call(func, *cpu_online_mask, arg1, arg2, arg3, 0); }
 static inline void xc4(smpfunc_t func, unsigned long arg1, unsigned long arg2,
 			   unsigned long arg3, unsigned long arg4)
-{ smp_cross_call(func, cpu_online_map, arg1, arg2, arg3, arg4); }
+{ smp_cross_call(func, *cpu_online_mask, arg1, arg2, arg3, arg4); }
 
-static inline int smp_call_function(void (*func)(void *info), void *info, int wait)
-{
-	xc1((smpfunc_t)func, (unsigned long)info);
-	return 0;
-}
-
-static inline int smp_call_function_single(int cpuid, void (*func) (void *info),
-					   void *info, int wait)
-{
-	smp_cross_call((smpfunc_t)func, cpumask_of_cpu(cpuid),
-		       (unsigned long) info, 0, 0, 0);
-	return 0;
-}
+extern void arch_send_call_function_single_ipi(int cpu);
+extern void arch_send_call_function_ipi_mask(const struct cpumask *mask);
 
 static inline int cpu_logical_map(int cpu)
 {
@@ -135,6 +131,11 @@
 		__asm__ __volatile__("lda [%g0] ASI_M_VIKING_TMP1, %0\n\t"
 				     "nop; nop" :
 				     "=&r" (cpuid));
+		     - leon
+		__asm__ __volatile__(	"rd %asr17, %0\n\t"
+					"srl %0, 0x1c, %0\n\t"
+					"nop\n\t" :
+					"=&r" (cpuid));
 	   See btfixup.h and btfixupprep.c to understand how a blackbox works.
 	 */
 	__asm__ __volatile__("sethi %%hi(___b_hard_smp_processor_id), %0\n\t"
diff --git a/arch/sparc/include/asm/smp_64.h b/arch/sparc/include/asm/smp_64.h
index f49e11c..20bca89 100644
--- a/arch/sparc/include/asm/smp_64.h
+++ b/arch/sparc/include/asm/smp_64.h
@@ -49,6 +49,10 @@
 
 extern void smp_fetch_global_regs(void);
 
+struct seq_file;
+void smp_bogo(struct seq_file *);
+void smp_info(struct seq_file *);
+
 #ifdef CONFIG_HOTPLUG_CPU
 extern int __cpu_disable(void);
 extern void __cpu_die(unsigned int cpu);
diff --git a/arch/sparc/include/asm/spinlock_32.h b/arch/sparc/include/asm/spinlock_32.h
index 7f9b9db..5f5b8bf 100644
--- a/arch/sparc/include/asm/spinlock_32.h
+++ b/arch/sparc/include/asm/spinlock_32.h
@@ -9,6 +9,7 @@
 #ifndef __ASSEMBLY__
 
 #include <asm/psr.h>
+#include <asm/processor.h> /* for cpu_relax */
 
 #define arch_spin_is_locked(lock) (*((volatile unsigned char *)(lock)) != 0)
 
diff --git a/arch/sparc/include/asm/system_32.h b/arch/sparc/include/asm/system_32.h
index 890036b..47a7e86 100644
--- a/arch/sparc/include/asm/system_32.h
+++ b/arch/sparc/include/asm/system_32.h
@@ -15,11 +15,6 @@
 
 #include <linux/irqflags.h>
 
-static inline unsigned int probe_irq_mask(unsigned long val)
-{
-	return 0;
-}
-
 /*
  * Sparc (general) CPU types
  */
diff --git a/arch/sparc/include/asm/system_64.h b/arch/sparc/include/asm/system_64.h
index e3b65d8..3c96d3b 100644
--- a/arch/sparc/include/asm/system_64.h
+++ b/arch/sparc/include/asm/system_64.h
@@ -29,10 +29,6 @@
 /* This cannot ever be a sun4c :) That's just history. */
 #define ARCH_SUN4C 0
 
-extern const char *sparc_cpu_type;
-extern const char *sparc_fpu_type;
-extern const char *sparc_pmu_type;
-
 extern char reboot_command[];
 
 /* These are here in an effort to more fully work around Spitfire Errata
diff --git a/arch/sparc/include/asm/winmacro.h b/arch/sparc/include/asm/winmacro.h
index 5b0a06d..a9be04b 100644
--- a/arch/sparc/include/asm/winmacro.h
+++ b/arch/sparc/include/asm/winmacro.h
@@ -103,6 +103,7 @@
         st       %scratch, [%cur_reg + TI_W_SAVED];
 
 #ifdef CONFIG_SMP
+/* Results of LOAD_CURRENT() after BTFIXUP for SUN4M, SUN4D & LEON (comments) */
 #define LOAD_CURRENT4M(dest_reg, idreg) \
         rd       %tbr, %idreg; \
 	sethi    %hi(current_set), %dest_reg; \
@@ -118,6 +119,14 @@
 	or	%dest_reg, %lo(C_LABEL(current_set)), %dest_reg; \
 	ld	[%idreg + %dest_reg], %dest_reg;
 
+#define LOAD_CURRENT_LEON(dest_reg, idreg)			\
+	rd	%asr17, %idreg;					\
+	sethi	%hi(current_set), %dest_reg;			\
+	srl	%idreg, 0x1c, %idreg;				\
+	or	%dest_reg, %lo(current_set), %dest_reg;		\
+	sll	%idreg, 0x2, %idreg;				\
+	ld	[%idreg + %dest_reg], %dest_reg;
+
 /* Blackbox - take care with this... - check smp4m and smp4d before changing this. */
 #define LOAD_CURRENT(dest_reg, idreg) 					\
 	sethi	 %hi(___b_load_current), %idreg;			\
diff --git a/arch/sparc/kernel/Makefile b/arch/sparc/kernel/Makefile
index 99aa4db..9cff270 100644
--- a/arch/sparc/kernel/Makefile
+++ b/arch/sparc/kernel/Makefile
@@ -71,10 +71,6 @@
 obj-$(CONFIG_SPARC64)	+= nmi.o
 obj-$(CONFIG_SPARC64_SMP) += cpumap.o
 
-# sparc32 do not use GENERIC_HARDIRQS but uses the generic devres implementation
-obj-$(CONFIG_SPARC32)     += devres.o
-devres-y                  := ../../../kernel/irq/devres.o
-
 obj-y                     += dma.o
 
 obj-$(CONFIG_SPARC32_PCI) += pcic.o
diff --git a/arch/sparc/kernel/cpu.c b/arch/sparc/kernel/cpu.c
index 7925c54..138dbbc 100644
--- a/arch/sparc/kernel/cpu.c
+++ b/arch/sparc/kernel/cpu.c
@@ -4,6 +4,7 @@
  * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
  */
 
+#include <linux/seq_file.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/init.h>
@@ -11,7 +12,9 @@
 #include <linux/threads.h>
 
 #include <asm/spitfire.h>
+#include <asm/pgtable.h>
 #include <asm/oplib.h>
+#include <asm/setup.h>
 #include <asm/page.h>
 #include <asm/head.h>
 #include <asm/psr.h>
@@ -23,6 +26,9 @@
 DEFINE_PER_CPU(cpuinfo_sparc, __cpu_data) = { 0 };
 EXPORT_PER_CPU_SYMBOL(__cpu_data);
 
+int ncpus_probed;
+unsigned int fsr_storage;
+
 struct cpu_info {
 	int psr_vers;
 	const char *name;
@@ -247,13 +253,12 @@
  * machine type value into consideration too.  I will fix this.
  */
 
-const char *sparc_cpu_type;
-const char *sparc_fpu_type;
+static const char *sparc_cpu_type;
+static const char *sparc_fpu_type;
 const char *sparc_pmu_type;
 
-unsigned int fsr_storage;
 
-static void set_cpu_and_fpu(int psr_impl, int psr_vers, int fpu_vers)
+static void __init set_cpu_and_fpu(int psr_impl, int psr_vers, int fpu_vers)
 {
 	const struct manufacturer_info *manuf;
 	int i;
@@ -313,7 +318,123 @@
 }
 
 #ifdef CONFIG_SPARC32
-void __cpuinit cpu_probe(void)
+static int show_cpuinfo(struct seq_file *m, void *__unused)
+{
+	seq_printf(m,
+		   "cpu\t\t: %s\n"
+		   "fpu\t\t: %s\n"
+		   "promlib\t\t: Version %d Revision %d\n"
+		   "prom\t\t: %d.%d\n"
+		   "type\t\t: %s\n"
+		   "ncpus probed\t: %d\n"
+		   "ncpus active\t: %d\n"
+#ifndef CONFIG_SMP
+		   "CPU0Bogo\t: %lu.%02lu\n"
+		   "CPU0ClkTck\t: %ld\n"
+#endif
+		   ,
+		   sparc_cpu_type,
+		   sparc_fpu_type ,
+		   romvec->pv_romvers,
+		   prom_rev,
+		   romvec->pv_printrev >> 16,
+		   romvec->pv_printrev & 0xffff,
+		   &cputypval[0],
+		   ncpus_probed,
+		   num_online_cpus()
+#ifndef CONFIG_SMP
+		   , cpu_data(0).udelay_val/(500000/HZ),
+		   (cpu_data(0).udelay_val/(5000/HZ)) % 100,
+		   cpu_data(0).clock_tick
+#endif
+		);
+
+#ifdef CONFIG_SMP
+	smp_bogo(m);
+#endif
+	mmu_info(m);
+#ifdef CONFIG_SMP
+	smp_info(m);
+#endif
+	return 0;
+}
+#endif /* CONFIG_SPARC32 */
+
+#ifdef CONFIG_SPARC64
+unsigned int dcache_parity_tl1_occurred;
+unsigned int icache_parity_tl1_occurred;
+
+
+static int show_cpuinfo(struct seq_file *m, void *__unused)
+{
+	seq_printf(m,
+		   "cpu\t\t: %s\n"
+		   "fpu\t\t: %s\n"
+		   "pmu\t\t: %s\n"
+		   "prom\t\t: %s\n"
+		   "type\t\t: %s\n"
+		   "ncpus probed\t: %d\n"
+		   "ncpus active\t: %d\n"
+		   "D$ parity tl1\t: %u\n"
+		   "I$ parity tl1\t: %u\n"
+#ifndef CONFIG_SMP
+		   "Cpu0ClkTck\t: %016lx\n"
+#endif
+		   ,
+		   sparc_cpu_type,
+		   sparc_fpu_type,
+		   sparc_pmu_type,
+		   prom_version,
+		   ((tlb_type == hypervisor) ?
+		    "sun4v" :
+		    "sun4u"),
+		   ncpus_probed,
+		   num_online_cpus(),
+		   dcache_parity_tl1_occurred,
+		   icache_parity_tl1_occurred
+#ifndef CONFIG_SMP
+		   , cpu_data(0).clock_tick
+#endif
+		);
+#ifdef CONFIG_SMP
+	smp_bogo(m);
+#endif
+	mmu_info(m);
+#ifdef CONFIG_SMP
+	smp_info(m);
+#endif
+	return 0;
+}
+#endif /* CONFIG_SPARC64 */
+
+static void *c_start(struct seq_file *m, loff_t *pos)
+{
+	/* The pointer we are returning is arbitrary,
+	 * it just has to be non-NULL and not IS_ERR
+	 * in the success case.
+	 */
+	return *pos == 0 ? &c_start : NULL;
+}
+
+static void *c_next(struct seq_file *m, void *v, loff_t *pos)
+{
+	++*pos;
+	return c_start(m, pos);
+}
+
+static void c_stop(struct seq_file *m, void *v)
+{
+}
+
+const struct seq_operations cpuinfo_op = {
+	.start =c_start,
+	.next =	c_next,
+	.stop =	c_stop,
+	.show =	show_cpuinfo,
+};
+
+#ifdef CONFIG_SPARC32
+static int __init cpu_type_probe(void)
 {
 	int psr_impl, psr_vers, fpu_vers;
 	int psr;
@@ -332,8 +453,12 @@
 	put_psr(psr);
 
 	set_cpu_and_fpu(psr_impl, psr_vers, fpu_vers);
+
+	return 0;
 }
-#else
+#endif /* CONFIG_SPARC32 */
+
+#ifdef CONFIG_SPARC64
 static void __init sun4v_cpu_probe(void)
 {
 	switch (sun4v_chip_type) {
@@ -374,6 +499,6 @@
 	}
 	return 0;
 }
+#endif /* CONFIG_SPARC64 */
 
 early_initcall(cpu_type_probe);
-#endif
diff --git a/arch/sparc/kernel/cpumap.c b/arch/sparc/kernel/cpumap.c
index 8de64c8..d91fd78 100644
--- a/arch/sparc/kernel/cpumap.c
+++ b/arch/sparc/kernel/cpumap.c
@@ -202,7 +202,7 @@
 	new_tree->total_nodes = n;
 	memcpy(&new_tree->level, tmp_level, sizeof(tmp_level));
 
-	prev_cpu = cpu = first_cpu(cpu_online_map);
+	prev_cpu = cpu = cpumask_first(cpu_online_mask);
 
 	/* Initialize all levels in the tree with the first CPU */
 	for (level = CPUINFO_LVL_PROC; level >= CPUINFO_LVL_ROOT; level--) {
@@ -381,7 +381,7 @@
 	}
 
 	/* Impossible, since num_online_cpus() <= num_possible_cpus() */
-	return first_cpu(cpu_online_map);
+	return cpumask_first(cpu_online_mask);
 }
 
 static int _map_to_cpu(unsigned int index)
diff --git a/arch/sparc/kernel/devices.c b/arch/sparc/kernel/devices.c
index d2eddd6..113c052 100644
--- a/arch/sparc/kernel/devices.c
+++ b/arch/sparc/kernel/devices.c
@@ -20,7 +20,6 @@
 #include <asm/system.h>
 #include <asm/cpudata.h>
 
-extern void cpu_probe(void);
 extern void clock_stop_probe(void); /* tadpole.c */
 extern void sun4c_probe_memerr_reg(void);
 
@@ -115,7 +114,7 @@
 
 void __init device_scan(void)
 {
-	prom_printf("Booting Linux...\n");
+	printk(KERN_NOTICE "Booting Linux...\n");
 
 #ifndef CONFIG_SMP
 	{
@@ -133,7 +132,6 @@
 	}
 #endif /* !CONFIG_SMP */
 
-	cpu_probe();
 	{
 		extern void auxio_probe(void);
 		extern void auxio_power_probe(void);
diff --git a/arch/sparc/kernel/ds.c b/arch/sparc/kernel/ds.c
index 3add4de..dd1342c 100644
--- a/arch/sparc/kernel/ds.c
+++ b/arch/sparc/kernel/ds.c
@@ -497,7 +497,7 @@
 	tag->num_records = ncpus;
 
 	i = 0;
-	for_each_cpu_mask(cpu, *mask) {
+	for_each_cpu(cpu, mask) {
 		ent[i].cpu = cpu;
 		ent[i].result = DR_CPU_RES_OK;
 		ent[i].stat = default_stat;
@@ -534,7 +534,7 @@
 	int resp_len, ncpus, cpu;
 	unsigned long flags;
 
-	ncpus = cpus_weight(*mask);
+	ncpus = cpumask_weight(mask);
 	resp_len = dr_cpu_size_response(ncpus);
 	resp = kzalloc(resp_len, GFP_KERNEL);
 	if (!resp)
@@ -547,7 +547,7 @@
 	mdesc_populate_present_mask(mask);
 	mdesc_fill_in_cpu_data(mask);
 
-	for_each_cpu_mask(cpu, *mask) {
+	for_each_cpu(cpu, mask) {
 		int err;
 
 		printk(KERN_INFO "ds-%llu: Starting cpu %d...\n",
@@ -593,7 +593,7 @@
 	int resp_len, ncpus, cpu;
 	unsigned long flags;
 
-	ncpus = cpus_weight(*mask);
+	ncpus = cpumask_weight(mask);
 	resp_len = dr_cpu_size_response(ncpus);
 	resp = kzalloc(resp_len, GFP_KERNEL);
 	if (!resp)
@@ -603,7 +603,7 @@
 			     resp_len, ncpus, mask,
 			     DR_CPU_STAT_UNCONFIGURED);
 
-	for_each_cpu_mask(cpu, *mask) {
+	for_each_cpu(cpu, mask) {
 		int err;
 
 		printk(KERN_INFO "ds-%llu: Shutting down cpu %d...\n",
@@ -649,13 +649,13 @@
 
 	purge_dups(cpu_list, tag->num_records);
 
-	cpus_clear(mask);
+	cpumask_clear(&mask);
 	for (i = 0; i < tag->num_records; i++) {
 		if (cpu_list[i] == CPU_SENTINEL)
 			continue;
 
 		if (cpu_list[i] < nr_cpu_ids)
-			cpu_set(cpu_list[i], mask);
+			cpumask_set_cpu(cpu_list[i], &mask);
 	}
 
 	if (tag->type == DR_CPU_CONFIGURE)
diff --git a/arch/sparc/kernel/entry.S b/arch/sparc/kernel/entry.S
index 6da784a..8341963 100644
--- a/arch/sparc/kernel/entry.S
+++ b/arch/sparc/kernel/entry.S
@@ -269,19 +269,22 @@
 	/* Here is where we check for possible SMP IPI passed to us
 	 * on some level other than 15 which is the NMI and only used
 	 * for cross calls.  That has a separate entry point below.
+	 *
+	 * IPIs are sent on Level 12, 13 and 14. See IRQ_IPI_*.
 	 */
 maybe_smp4m_msg:
 	GET_PROCESSOR4M_ID(o3)
 	sethi	%hi(sun4m_irq_percpu), %l5
 	sll	%o3, 2, %o3
 	or	%l5, %lo(sun4m_irq_percpu), %o5
-	sethi	%hi(0x40000000), %o2
+	sethi	%hi(0x70000000), %o2	! Check all soft-IRQs
 	ld	[%o5 + %o3], %o1
 	ld	[%o1 + 0x00], %o3	! sun4m_irq_percpu[cpu]->pending
 	andcc	%o3, %o2, %g0
 	be,a	smp4m_ticker
 	 cmp	%l7, 14
-	st	%o2, [%o1 + 0x04]	! sun4m_irq_percpu[cpu]->clear=0x40000000
+	/* Soft-IRQ IPI */
+	st	%o2, [%o1 + 0x04]	! sun4m_irq_percpu[cpu]->clear=0x70000000
 	WRITE_PAUSE
 	ld	[%o1 + 0x00], %g0	! sun4m_irq_percpu[cpu]->pending
 	WRITE_PAUSE
@@ -290,9 +293,27 @@
 	WRITE_PAUSE
 	wr	%l4, PSR_ET, %psr
 	WRITE_PAUSE
-	call	smp_reschedule_irq
+	sll	%o2, 28, %o2		! shift for simpler checks below
+maybe_smp4m_msg_check_single:
+	andcc	%o2, 0x1, %g0
+	beq,a	maybe_smp4m_msg_check_mask
+	 andcc	%o2, 0x2, %g0
+	call	smp_call_function_single_interrupt
 	 nop
-
+	andcc	%o2, 0x2, %g0
+maybe_smp4m_msg_check_mask:
+	beq,a	maybe_smp4m_msg_check_resched
+	 andcc	%o2, 0x4, %g0
+	call	smp_call_function_interrupt
+	 nop
+	andcc	%o2, 0x4, %g0
+maybe_smp4m_msg_check_resched:
+	/* rescheduling is done in RESTORE_ALL regardless, but incr stats */
+	beq,a	maybe_smp4m_msg_out
+	 nop
+	call	smp_resched_interrupt
+	 nop
+maybe_smp4m_msg_out:
 	RESTORE_ALL
 
 	.align	4
@@ -401,18 +422,18 @@
 1:	b,a	1b
 
 #ifdef CONFIG_SPARC_LEON
-
-	.globl	smpleon_ticker
-	/* SMP per-cpu ticker interrupts are handled specially. */
-smpleon_ticker:
+	.globl	smpleon_ipi
+	.extern leon_ipi_interrupt
+	/* SMP per-cpu IPI interrupts are handled specially. */
+smpleon_ipi:
         SAVE_ALL
 	or	%l0, PSR_PIL, %g2
 	wr	%g2, 0x0, %psr
 	WRITE_PAUSE
 	wr	%g2, PSR_ET, %psr
 	WRITE_PAUSE
-	call	leon_percpu_timer_interrupt
-	 add	%sp, STACKFRAME_SZ, %o0
+	call	leonsmp_ipi_interrupt
+	 add	%sp, STACKFRAME_SZ, %o1 ! pt_regs
 	wr	%l0, PSR_ET, %psr
 	WRITE_PAUSE
 	RESTORE_ALL
diff --git a/arch/sparc/kernel/head_32.S b/arch/sparc/kernel/head_32.S
index 5942349..5877857 100644
--- a/arch/sparc/kernel/head_32.S
+++ b/arch/sparc/kernel/head_32.S
@@ -810,30 +810,24 @@
 got_prop:
 #ifdef CONFIG_SPARC_LEON
 	        /* no cpu-type check is needed, it is a SPARC-LEON */
+
+		sethi	%hi(boot_cpu_id), %g2	! boot-cpu index
+
 #ifdef CONFIG_SMP
-		ba leon_smp_init
-		 nop
-
-		.global leon_smp_init
-leon_smp_init:
-		sethi	%hi(boot_cpu_id), %g1    ! master always 0
-		stb	%g0, [%g1 + %lo(boot_cpu_id)]
-		sethi	%hi(boot_cpu_id4), %g1   ! master always 0
-		stb	%g0, [%g1 + %lo(boot_cpu_id4)]
-
-		rd     %asr17,%g1
-		srl    %g1,28,%g1
-
-		cmp %g0,%g1
-		 beq sun4c_continue_boot         !continue with master
-		nop
-
-		ba leon_smp_cpu_startup
-		 nop
-#else
-		ba sun4c_continue_boot
+		ldub	[%g2 + %lo(boot_cpu_id)], %g1
+		cmp	%g1, 0xff		! unset means first CPU
+		bne	leon_smp_cpu_startup	! continue only with master
 		 nop
 #endif
+		/* Get CPU-ID from most significant 4-bit of ASR17 */
+		rd     %asr17, %g1
+		srl    %g1, 28, %g1
+
+		/* Update boot_cpu_id only on boot cpu */
+		stub	%g1, [%g2 + %lo(boot_cpu_id)]
+
+		ba sun4c_continue_boot
+		 nop
 #endif
 		set	cputypval, %o2
 		ldub	[%o2 + 0x4], %l1
@@ -893,9 +887,6 @@
 	sta     %g4, [%g0] ASI_M_VIKING_TMP1
 	sethi	%hi(boot_cpu_id), %g5
 	stb	%g4, [%g5 + %lo(boot_cpu_id)]
-	sll	%g4, 2, %g4
-	sethi	%hi(boot_cpu_id4), %g5
-	stb	%g4, [%g5 + %lo(boot_cpu_id4)]
 #endif
 
 	/* Fall through to sun4m_init */
@@ -1024,14 +1015,28 @@
 		bl	1b
 		 add	%o0, 0x1, %o0
 
+		/* If boot_cpu_id has not been setup by machine specific
+		 * init-code above we default it to zero.
+		 */
+		sethi	%hi(boot_cpu_id), %g2
+		ldub	[%g2 + %lo(boot_cpu_id)], %g3
+		cmp	%g3, 0xff
+		bne	1f
+		 nop
+		mov	%g0, %g3
+		stub	%g3, [%g2 + %lo(boot_cpu_id)]
+
+1:		/* boot_cpu_id set. calculate boot_cpu_id4 = boot_cpu_id*4 */
+		sll	%g3, 2, %g3
+		sethi	%hi(boot_cpu_id4), %g2
+		stub	%g3, [%g2 + %lo(boot_cpu_id4)]
+
 		/* Initialize the uwinmask value for init task just in case.
 		 * But first make current_set[boot_cpu_id] point to something useful.
 		 */
 		set	init_thread_union, %g6
 		set	current_set, %g2
 #ifdef CONFIG_SMP
-		sethi	%hi(boot_cpu_id4), %g3
-		ldub	[%g3 + %lo(boot_cpu_id4)], %g3
 		st	%g6, [%g2]
 		add	%g2, %g3, %g2
 #endif
diff --git a/arch/sparc/kernel/ioport.c b/arch/sparc/kernel/ioport.c
index c6ce9a6..1c9c80a 100644
--- a/arch/sparc/kernel/ioport.c
+++ b/arch/sparc/kernel/ioport.c
@@ -50,10 +50,15 @@
 #include <asm/io-unit.h>
 #include <asm/leon.h>
 
+/* This function must make sure that caches and memory are coherent after DMA
+ * On LEON systems without cache snooping it flushes the entire D-CACHE.
+ */
 #ifndef CONFIG_SPARC_LEON
-#define mmu_inval_dma_area(p, l)	/* Anton pulled it out for 2.4.0-xx */
+static inline void dma_make_coherent(unsigned long pa, unsigned long len)
+{
+}
 #else
-static inline void mmu_inval_dma_area(void *va, unsigned long len)
+static inline void dma_make_coherent(unsigned long pa, unsigned long len)
 {
 	if (!sparc_leon3_snooping_enabled())
 		leon_flush_dcache_all();
@@ -284,7 +289,6 @@
 		printk("sbus_alloc_consistent: cannot occupy 0x%lx", len_total);
 		goto err_nova;
 	}
-	mmu_inval_dma_area((void *)va, len_total);
 
 	// XXX The mmu_map_dma_area does this for us below, see comments.
 	// sparc_mapiorange(0, virt_to_phys(va), res->start, len_total);
@@ -336,7 +340,6 @@
 	release_resource(res);
 	kfree(res);
 
-	/* mmu_inval_dma_area(va, n); */ /* it's consistent, isn't it */
 	pgv = virt_to_page(p);
 	mmu_unmap_dma_area(dev, ba, n);
 
@@ -463,7 +466,6 @@
 		printk("pci_alloc_consistent: cannot occupy 0x%lx", len_total);
 		goto err_nova;
 	}
-	mmu_inval_dma_area(va, len_total);
 	sparc_mapiorange(0, virt_to_phys(va), res->start, len_total);
 
 	*pba = virt_to_phys(va); /* equals virt_to_bus (R.I.P.) for us. */
@@ -489,7 +491,6 @@
 				dma_addr_t ba)
 {
 	struct resource *res;
-	void *pgp;
 
 	if ((res = _sparc_find_resource(&_sparc_dvma,
 	    (unsigned long)p)) == NULL) {
@@ -509,14 +510,12 @@
 		return;
 	}
 
-	pgp = phys_to_virt(ba);	/* bus_to_virt actually */
-	mmu_inval_dma_area(pgp, n);
+	dma_make_coherent(ba, n);
 	sparc_unmapiorange((unsigned long)p, n);
 
 	release_resource(res);
 	kfree(res);
-
-	free_pages((unsigned long)pgp, get_order(n));
+	free_pages((unsigned long)phys_to_virt(ba), get_order(n));
 }
 
 /*
@@ -535,7 +534,7 @@
 			     enum dma_data_direction dir, struct dma_attrs *attrs)
 {
 	if (dir != PCI_DMA_TODEVICE)
-		mmu_inval_dma_area(phys_to_virt(ba), PAGE_ALIGN(size));
+		dma_make_coherent(ba, PAGE_ALIGN(size));
 }
 
 /* Map a set of buffers described by scatterlist in streaming
@@ -562,8 +561,7 @@
 
 	/* IIep is write-through, not flushing. */
 	for_each_sg(sgl, sg, nents, n) {
-		BUG_ON(page_address(sg_page(sg)) == NULL);
-		sg->dma_address = virt_to_phys(sg_virt(sg));
+		sg->dma_address = sg_phys(sg);
 		sg->dma_length = sg->length;
 	}
 	return nents;
@@ -582,9 +580,7 @@
 
 	if (dir != PCI_DMA_TODEVICE) {
 		for_each_sg(sgl, sg, nents, n) {
-			BUG_ON(page_address(sg_page(sg)) == NULL);
-			mmu_inval_dma_area(page_address(sg_page(sg)),
-					   PAGE_ALIGN(sg->length));
+			dma_make_coherent(sg_phys(sg), PAGE_ALIGN(sg->length));
 		}
 	}
 }
@@ -603,8 +599,7 @@
 				      size_t size, enum dma_data_direction dir)
 {
 	if (dir != PCI_DMA_TODEVICE) {
-		mmu_inval_dma_area(phys_to_virt(ba),
-				   PAGE_ALIGN(size));
+		dma_make_coherent(ba, PAGE_ALIGN(size));
 	}
 }
 
@@ -612,8 +607,7 @@
 					 size_t size, enum dma_data_direction dir)
 {
 	if (dir != PCI_DMA_TODEVICE) {
-		mmu_inval_dma_area(phys_to_virt(ba),
-				   PAGE_ALIGN(size));
+		dma_make_coherent(ba, PAGE_ALIGN(size));
 	}
 }
 
@@ -631,9 +625,7 @@
 
 	if (dir != PCI_DMA_TODEVICE) {
 		for_each_sg(sgl, sg, nents, n) {
-			BUG_ON(page_address(sg_page(sg)) == NULL);
-			mmu_inval_dma_area(page_address(sg_page(sg)),
-					   PAGE_ALIGN(sg->length));
+			dma_make_coherent(sg_phys(sg), PAGE_ALIGN(sg->length));
 		}
 	}
 }
@@ -646,9 +638,7 @@
 
 	if (dir != PCI_DMA_TODEVICE) {
 		for_each_sg(sgl, sg, nents, n) {
-			BUG_ON(page_address(sg_page(sg)) == NULL);
-			mmu_inval_dma_area(page_address(sg_page(sg)),
-					   PAGE_ALIGN(sg->length));
+			dma_make_coherent(sg_phys(sg), PAGE_ALIGN(sg->length));
 		}
 	}
 }
diff --git a/arch/sparc/kernel/irq.h b/arch/sparc/kernel/irq.h
index 008453b..100b9c2 100644
--- a/arch/sparc/kernel/irq.h
+++ b/arch/sparc/kernel/irq.h
@@ -2,6 +2,23 @@
 
 #include <asm/btfixup.h>
 
+struct irq_bucket {
+        struct irq_bucket *next;
+        unsigned int real_irq;
+        unsigned int irq;
+        unsigned int pil;
+};
+
+#define SUN4D_MAX_BOARD 10
+#define SUN4D_MAX_IRQ ((SUN4D_MAX_BOARD + 2) << 5)
+
+/* Map between the irq identifier used in hw to the
+ * irq_bucket. The map is sufficient large to hold
+ * the sun4d hw identifiers.
+ */
+extern struct irq_bucket *irq_map[SUN4D_MAX_IRQ];
+
+
 /* sun4m specific type definitions */
 
 /* This maps direct to CPU specific interrupt registers */
@@ -35,6 +52,10 @@
 };
 extern struct sparc_irq_config sparc_irq_config;
 
+unsigned int irq_alloc(unsigned int real_irq, unsigned int pil);
+void irq_link(unsigned int irq);
+void irq_unlink(unsigned int irq);
+void handler_irq(unsigned int pil, struct pt_regs *regs);
 
 /* Dave Redman (djhr@tadpole.co.uk)
  * changed these to function pointers.. it saves cycles and will allow
@@ -44,33 +65,9 @@
  * Changed these to btfixup entities... It saves cycles :)
  */
 
-BTFIXUPDEF_CALL(void, disable_irq, unsigned int)
-BTFIXUPDEF_CALL(void, enable_irq, unsigned int)
-BTFIXUPDEF_CALL(void, disable_pil_irq, unsigned int)
-BTFIXUPDEF_CALL(void, enable_pil_irq, unsigned int)
 BTFIXUPDEF_CALL(void, clear_clock_irq, void)
 BTFIXUPDEF_CALL(void, load_profile_irq, int, unsigned int)
 
-static inline void __disable_irq(unsigned int irq)
-{
-	BTFIXUP_CALL(disable_irq)(irq);
-}
-
-static inline void __enable_irq(unsigned int irq)
-{
-	BTFIXUP_CALL(enable_irq)(irq);
-}
-
-static inline void disable_pil_irq(unsigned int irq)
-{
-	BTFIXUP_CALL(disable_pil_irq)(irq);
-}
-
-static inline void enable_pil_irq(unsigned int irq)
-{
-	BTFIXUP_CALL(enable_pil_irq)(irq);
-}
-
 static inline void clear_clock_irq(void)
 {
 	BTFIXUP_CALL(clear_clock_irq)();
@@ -89,4 +86,10 @@
 #define set_cpu_int(cpu,level) BTFIXUP_CALL(set_cpu_int)(cpu,level)
 #define clear_cpu_int(cpu,level) BTFIXUP_CALL(clear_cpu_int)(cpu,level)
 #define set_irq_udt(cpu) BTFIXUP_CALL(set_irq_udt)(cpu)
+
+/* All SUN4D IPIs are sent on this IRQ, may be shared with hard IRQs */
+#define SUN4D_IPI_IRQ 14
+
+extern void sun4d_ipi_interrupt(void);
+
 #endif
diff --git a/arch/sparc/kernel/irq_32.c b/arch/sparc/kernel/irq_32.c
index 7c93df4..9b89d842 100644
--- a/arch/sparc/kernel/irq_32.c
+++ b/arch/sparc/kernel/irq_32.c
@@ -15,6 +15,7 @@
 #include <linux/seq_file.h>
 
 #include <asm/cacheflush.h>
+#include <asm/cpudata.h>
 #include <asm/pcic.h>
 #include <asm/leon.h>
 
@@ -101,284 +102,173 @@
  * directed CPU interrupts using the existing enable/disable irq code
  * with tweaks.
  *
+ * Sun4d complicates things even further.  IRQ numbers are arbitrary
+ * 32-bit values in that case.  Since this is similar to sparc64,
+ * we adopt a virtual IRQ numbering scheme as is done there.
+ * Virutal interrupt numbers are allocated by build_irq().  So NR_IRQS
+ * just becomes a limit of how many interrupt sources we can handle in
+ * a single system.  Even fully loaded SS2000 machines top off at
+ * about 32 interrupt sources or so, therefore a NR_IRQS value of 64
+ * is more than enough.
+  *
+ * We keep a map of per-PIL enable interrupts.  These get wired
+ * up via the irq_chip->startup() method which gets invoked by
+ * the generic IRQ layer during request_irq().
  */
 
 
+/* Table of allocated irqs. Unused entries has irq == 0 */
+static struct irq_bucket irq_table[NR_IRQS];
+/* Protect access to irq_table */
+static DEFINE_SPINLOCK(irq_table_lock);
 
-/*
- * Dave Redman (djhr@tadpole.co.uk)
- *
- * There used to be extern calls and hard coded values here.. very sucky!
- * instead, because some of the devices attach very early, I do something
- * equally sucky but at least we'll never try to free statically allocated
- * space or call kmalloc before kmalloc_init :(.
- *
- * In fact it's the timer10 that attaches first.. then timer14
- * then kmalloc_init is called.. then the tty interrupts attach.
- * hmmm....
- *
- */
-#define MAX_STATIC_ALLOC	4
-struct irqaction static_irqaction[MAX_STATIC_ALLOC];
-int static_irq_count;
+/* Map between the irq identifier used in hw to the irq_bucket. */
+struct irq_bucket *irq_map[SUN4D_MAX_IRQ];
+/* Protect access to irq_map */
+static DEFINE_SPINLOCK(irq_map_lock);
 
-static struct {
-	struct irqaction *action;
-	int flags;
-} sparc_irq[NR_IRQS];
-#define SPARC_IRQ_INPROGRESS 1
-
-/* Used to protect the IRQ action lists */
-DEFINE_SPINLOCK(irq_action_lock);
-
-int show_interrupts(struct seq_file *p, void *v)
+/* Allocate a new irq from the irq_table */
+unsigned int irq_alloc(unsigned int real_irq, unsigned int pil)
 {
-	int i = *(loff_t *)v;
-	struct irqaction *action;
 	unsigned long flags;
-#ifdef CONFIG_SMP
-	int j;
-#endif
+	unsigned int i;
 
-	if (sparc_cpu_model == sun4d)
-		return show_sun4d_interrupts(p, v);
-
-	spin_lock_irqsave(&irq_action_lock, flags);
-	if (i < NR_IRQS) {
-		action = sparc_irq[i].action;
-		if (!action)
-			goto out_unlock;
-		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]);
-		}
-#endif
-		seq_printf(p, " %c %s",
-			(action->flags & IRQF_DISABLED) ? '+' : ' ',
-			action->name);
-		for (action = action->next; action; action = action->next) {
-			seq_printf(p, ",%s %s",
-				(action->flags & IRQF_DISABLED) ? " +" : "",
-				action->name);
-		}
-		seq_putc(p, '\n');
+	spin_lock_irqsave(&irq_table_lock, flags);
+	for (i = 1; i < NR_IRQS; i++) {
+		if (irq_table[i].real_irq == real_irq && irq_table[i].pil == pil)
+			goto found;
 	}
-out_unlock:
-	spin_unlock_irqrestore(&irq_action_lock, flags);
+
+	for (i = 1; i < NR_IRQS; i++) {
+		if (!irq_table[i].irq)
+			break;
+	}
+
+	if (i < NR_IRQS) {
+		irq_table[i].real_irq = real_irq;
+		irq_table[i].irq = i;
+		irq_table[i].pil = pil;
+	} else {
+		printk(KERN_ERR "IRQ: Out of virtual IRQs.\n");
+		i = 0;
+	}
+found:
+	spin_unlock_irqrestore(&irq_table_lock, flags);
+
+	return i;
+}
+
+/* Based on a single pil handler_irq may need to call several
+ * interrupt handlers. Use irq_map as entry to irq_table,
+ * and let each entry in irq_table point to the next entry.
+ */
+void irq_link(unsigned int irq)
+{
+	struct irq_bucket *p;
+	unsigned long flags;
+	unsigned int pil;
+
+	BUG_ON(irq >= NR_IRQS);
+
+	spin_lock_irqsave(&irq_map_lock, flags);
+
+	p = &irq_table[irq];
+	pil = p->pil;
+	BUG_ON(pil > SUN4D_MAX_IRQ);
+	p->next = irq_map[pil];
+	irq_map[pil] = p;
+
+	spin_unlock_irqrestore(&irq_map_lock, flags);
+}
+
+void irq_unlink(unsigned int irq)
+{
+	struct irq_bucket *p, **pnext;
+	unsigned long flags;
+
+	BUG_ON(irq >= NR_IRQS);
+
+	spin_lock_irqsave(&irq_map_lock, flags);
+
+	p = &irq_table[irq];
+	BUG_ON(p->pil > SUN4D_MAX_IRQ);
+	pnext = &irq_map[p->pil];
+	while (*pnext != p)
+		pnext = &(*pnext)->next;
+	*pnext = p->next;
+
+	spin_unlock_irqrestore(&irq_map_lock, flags);
+}
+
+
+/* /proc/interrupts printing */
+int arch_show_interrupts(struct seq_file *p, int prec)
+{
+	int j;
+
+#ifdef CONFIG_SMP
+	seq_printf(p, "RES: ");
+	for_each_online_cpu(j)
+		seq_printf(p, "%10u ", cpu_data(j).irq_resched_count);
+	seq_printf(p, "     IPI rescheduling interrupts\n");
+	seq_printf(p, "CAL: ");
+	for_each_online_cpu(j)
+		seq_printf(p, "%10u ", cpu_data(j).irq_call_count);
+	seq_printf(p, "     IPI function call interrupts\n");
+#endif
+	seq_printf(p, "NMI: ");
+	for_each_online_cpu(j)
+		seq_printf(p, "%10u ", cpu_data(j).counter);
+	seq_printf(p, "     Non-maskable interrupts\n");
 	return 0;
 }
 
-void free_irq(unsigned int irq, void *dev_id)
-{
-	struct irqaction *action;
-	struct irqaction **actionp;
-	unsigned long flags;
-	unsigned int cpu_irq;
-
-	if (sparc_cpu_model == sun4d) {
-		sun4d_free_irq(irq, dev_id);
-		return;
-	}
-	cpu_irq = irq & (NR_IRQS - 1);
-	if (cpu_irq > 14) {  /* 14 irq levels on the sparc */
-		printk(KERN_ERR "Trying to free bogus IRQ %d\n", irq);
-		return;
-	}
-
-	spin_lock_irqsave(&irq_action_lock, flags);
-
-	actionp = &sparc_irq[cpu_irq].action;
-	action = *actionp;
-
-	if (!action->handler) {
-		printk(KERN_ERR "Trying to free free IRQ%d\n", irq);
-		goto out_unlock;
-	}
-	if (dev_id) {
-		for (; action; action = action->next) {
-			if (action->dev_id == dev_id)
-				break;
-			actionp = &action->next;
-		}
-		if (!action) {
-			printk(KERN_ERR "Trying to free free shared IRQ%d\n",
-			       irq);
-			goto out_unlock;
-		}
-	} else if (action->flags & IRQF_SHARED) {
-		printk(KERN_ERR "Trying to free shared IRQ%d with NULL device ID\n",
-		       irq);
-		goto out_unlock;
-	}
-	if (action->flags & SA_STATIC_ALLOC) {
-		/*
-		 * This interrupt is marked as specially allocated
-		 * so it is a bad idea to free it.
-		 */
-		printk(KERN_ERR "Attempt to free statically allocated IRQ%d (%s)\n",
-		       irq, action->name);
-		goto out_unlock;
-	}
-
-	*actionp = action->next;
-
-	spin_unlock_irqrestore(&irq_action_lock, flags);
-
-	synchronize_irq(irq);
-
-	spin_lock_irqsave(&irq_action_lock, flags);
-
-	kfree(action);
-
-	if (!sparc_irq[cpu_irq].action)
-		__disable_irq(irq);
-
-out_unlock:
-	spin_unlock_irqrestore(&irq_action_lock, flags);
-}
-EXPORT_SYMBOL(free_irq);
-
-/*
- * This is called when we want to synchronize with
- * interrupts. We may for example tell a device to
- * stop sending interrupts: but to make sure there
- * are no interrupts that are executing on another
- * CPU we need to call this function.
- */
-#ifdef CONFIG_SMP
-void synchronize_irq(unsigned int irq)
-{
-	unsigned int cpu_irq;
-
-	cpu_irq = irq & (NR_IRQS - 1);
-	while (sparc_irq[cpu_irq].flags & SPARC_IRQ_INPROGRESS)
-		cpu_relax();
-}
-EXPORT_SYMBOL(synchronize_irq);
-#endif /* SMP */
-
-void unexpected_irq(int irq, void *dev_id, struct pt_regs *regs)
-{
-	int i;
-	struct irqaction *action;
-	unsigned int cpu_irq;
-
-	cpu_irq = irq & (NR_IRQS - 1);
-	action = sparc_irq[cpu_irq].action;
-
-	printk(KERN_ERR "IO device interrupt, irq = %d\n", irq);
-	printk(KERN_ERR "PC = %08lx NPC = %08lx FP=%08lx\n", regs->pc,
-		    regs->npc, regs->u_regs[14]);
-	if (action) {
-		printk(KERN_ERR "Expecting: ");
-		for (i = 0; i < 16; i++)
-			if (action->handler)
-				printk(KERN_CONT "[%s:%d:0x%x] ", action->name,
-				       i, (unsigned int)action->handler);
-	}
-	printk(KERN_ERR "AIEEE\n");
-	panic("bogus interrupt received");
-}
-
-void handler_irq(int pil, struct pt_regs *regs)
+void handler_irq(unsigned int pil, struct pt_regs *regs)
 {
 	struct pt_regs *old_regs;
-	struct irqaction *action;
-	int cpu = smp_processor_id();
+	struct irq_bucket *p;
 
+	BUG_ON(pil > 15);
 	old_regs = set_irq_regs(regs);
 	irq_enter();
-	disable_pil_irq(pil);
-#ifdef CONFIG_SMP
-	/* Only rotate on lower priority IRQs (scsi, ethernet, etc.). */
-	if ((sparc_cpu_model==sun4m) && (pil < 10))
-		smp4m_irq_rotate(cpu);
-#endif
-	action = sparc_irq[pil].action;
-	sparc_irq[pil].flags |= SPARC_IRQ_INPROGRESS;
-	kstat_cpu(cpu).irqs[pil]++;
-	do {
-		if (!action || !action->handler)
-			unexpected_irq(pil, NULL, regs);
-		action->handler(pil, action->dev_id);
-		action = action->next;
-	} while (action);
-	sparc_irq[pil].flags &= ~SPARC_IRQ_INPROGRESS;
-	enable_pil_irq(pil);
+
+	p = irq_map[pil];
+	while (p) {
+		struct irq_bucket *next = p->next;
+
+		generic_handle_irq(p->irq);
+		p = next;
+	}
 	irq_exit();
 	set_irq_regs(old_regs);
 }
 
 #if defined(CONFIG_BLK_DEV_FD) || defined(CONFIG_BLK_DEV_FD_MODULE)
+static unsigned int floppy_irq;
 
-/*
- * Fast IRQs on the Sparc can only have one routine attached to them,
- * thus no sharing possible.
- */
-static int request_fast_irq(unsigned int irq,
-			    void (*handler)(void),
-			    unsigned long irqflags, const char *devname)
+int sparc_floppy_request_irq(unsigned int irq, irq_handler_t irq_handler)
 {
-	struct irqaction *action;
-	unsigned long flags;
 	unsigned int cpu_irq;
-	int ret;
+	int err;
+
 #if defined CONFIG_SMP && !defined CONFIG_SPARC_LEON
 	struct tt_entry *trap_table;
 #endif
-	cpu_irq = irq & (NR_IRQS - 1);
-	if (cpu_irq > 14) {
-		ret = -EINVAL;
-		goto out;
-	}
-	if (!handler) {
-		ret = -EINVAL;
-		goto out;
-	}
 
-	spin_lock_irqsave(&irq_action_lock, flags);
+	err = request_irq(irq, irq_handler, 0, "floppy", NULL);
+	if (err)
+		return -1;
 
-	action = sparc_irq[cpu_irq].action;
-	if (action) {
-		if (action->flags & IRQF_SHARED)
-			panic("Trying to register fast irq when already shared.\n");
-		if (irqflags & IRQF_SHARED)
-			panic("Trying to register fast irq as shared.\n");
+	/* Save for later use in floppy interrupt handler */
+	floppy_irq = irq;
 
-		/* Anyway, someone already owns it so cannot be made fast. */
-		printk(KERN_ERR "request_fast_irq: Trying to register yet already owned.\n");
-		ret = -EBUSY;
-		goto out_unlock;
-	}
-
-	/*
-	 * If this is flagged as statically allocated then we use our
-	 * private struct which is never freed.
-	 */
-	if (irqflags & SA_STATIC_ALLOC) {
-		if (static_irq_count < MAX_STATIC_ALLOC)
-			action = &static_irqaction[static_irq_count++];
-		else
-			printk(KERN_ERR "Fast IRQ%d (%s) SA_STATIC_ALLOC failed using kmalloc\n",
-			       irq, devname);
-	}
-
-	if (action == NULL)
-		action = kmalloc(sizeof(struct irqaction), GFP_ATOMIC);
-	if (!action) {
-		ret = -ENOMEM;
-		goto out_unlock;
-	}
+	cpu_irq = (irq & (NR_IRQS - 1));
 
 	/* Dork with trap table if we get this far. */
 #define INSTANTIATE(table) \
 	table[SP_TRAP_IRQ1+(cpu_irq-1)].inst_one = SPARC_RD_PSR_L0; \
 	table[SP_TRAP_IRQ1+(cpu_irq-1)].inst_two = \
-		SPARC_BRANCH((unsigned long) handler, \
+		SPARC_BRANCH((unsigned long) floppy_hardint, \
 			     (unsigned long) &table[SP_TRAP_IRQ1+(cpu_irq-1)].inst_two);\
 	table[SP_TRAP_IRQ1+(cpu_irq-1)].inst_three = SPARC_RD_WIM_L3; \
 	table[SP_TRAP_IRQ1+(cpu_irq-1)].inst_four = SPARC_NOP;
@@ -399,22 +289,9 @@
 	 * writing we have no CPU-neutral interface to fine-grained flushes.
 	 */
 	flush_cache_all();
-
-	action->flags = irqflags;
-	action->name = devname;
-	action->dev_id = NULL;
-	action->next = NULL;
-
-	sparc_irq[cpu_irq].action = action;
-
-	__enable_irq(irq);
-
-	ret = 0;
-out_unlock:
-	spin_unlock_irqrestore(&irq_action_lock, flags);
-out:
-	return ret;
+	return 0;
 }
+EXPORT_SYMBOL(sparc_floppy_request_irq);
 
 /*
  * These variables are used to access state from the assembler
@@ -440,154 +317,23 @@
 unsigned long pdma_areasize;
 EXPORT_SYMBOL(pdma_areasize);
 
-static irq_handler_t floppy_irq_handler;
-
+/* Use the generic irq support to call floppy_interrupt
+ * which was setup using request_irq() in sparc_floppy_request_irq().
+ * We only have one floppy interrupt so we do not need to check
+ * for additional handlers being wired up by irq_link()
+ */
 void sparc_floppy_irq(int irq, void *dev_id, struct pt_regs *regs)
 {
 	struct pt_regs *old_regs;
-	int cpu = smp_processor_id();
 
 	old_regs = set_irq_regs(regs);
-	disable_pil_irq(irq);
 	irq_enter();
-	kstat_cpu(cpu).irqs[irq]++;
-	floppy_irq_handler(irq, dev_id);
+	generic_handle_irq(floppy_irq);
 	irq_exit();
-	enable_pil_irq(irq);
 	set_irq_regs(old_regs);
-	/*
-	 * XXX Eek, it's totally changed with preempt_count() and such
-	 * if (softirq_pending(cpu))
-	 *	do_softirq();
-	 */
 }
-
-int sparc_floppy_request_irq(int irq, unsigned long flags,
-			     irq_handler_t irq_handler)
-{
-	floppy_irq_handler = irq_handler;
-	return request_fast_irq(irq, floppy_hardint, flags, "floppy");
-}
-EXPORT_SYMBOL(sparc_floppy_request_irq);
-
 #endif
 
-int request_irq(unsigned int irq,
-		irq_handler_t handler,
-		unsigned long irqflags, const char *devname, void *dev_id)
-{
-	struct irqaction *action, **actionp;
-	unsigned long flags;
-	unsigned int cpu_irq;
-	int ret;
-
-	if (sparc_cpu_model == sun4d)
-		return sun4d_request_irq(irq, handler, irqflags, devname, dev_id);
-
-	cpu_irq = irq & (NR_IRQS - 1);
-	if (cpu_irq > 14) {
-		ret = -EINVAL;
-		goto out;
-	}
-	if (!handler) {
-		ret = -EINVAL;
-		goto out;
-	}
-
-	spin_lock_irqsave(&irq_action_lock, flags);
-
-	actionp = &sparc_irq[cpu_irq].action;
-	action = *actionp;
-	if (action) {
-		if (!(action->flags & IRQF_SHARED) || !(irqflags & IRQF_SHARED)) {
-			ret = -EBUSY;
-			goto out_unlock;
-		}
-		if ((action->flags & IRQF_DISABLED) != (irqflags & IRQF_DISABLED)) {
-			printk(KERN_ERR "Attempt to mix fast and slow interrupts on IRQ%d denied\n",
-			       irq);
-			ret = -EBUSY;
-			goto out_unlock;
-		}
-		for ( ; action; action = *actionp)
-			actionp = &action->next;
-	}
-
-	/* If this is flagged as statically allocated then we use our
-	 * private struct which is never freed.
-	 */
-	if (irqflags & SA_STATIC_ALLOC) {
-		if (static_irq_count < MAX_STATIC_ALLOC)
-			action = &static_irqaction[static_irq_count++];
-		else
-			printk(KERN_ERR "Request for IRQ%d (%s) SA_STATIC_ALLOC failed using kmalloc\n",
-			       irq, devname);
-	}
-	if (action == NULL)
-		action = kmalloc(sizeof(struct irqaction), GFP_ATOMIC);
-	if (!action) {
-		ret = -ENOMEM;
-		goto out_unlock;
-	}
-
-	action->handler = handler;
-	action->flags = irqflags;
-	action->name = devname;
-	action->next = NULL;
-	action->dev_id = dev_id;
-
-	*actionp = action;
-
-	__enable_irq(irq);
-
-	ret = 0;
-out_unlock:
-	spin_unlock_irqrestore(&irq_action_lock, flags);
-out:
-	return ret;
-}
-EXPORT_SYMBOL(request_irq);
-
-void disable_irq_nosync(unsigned int irq)
-{
-	__disable_irq(irq);
-}
-EXPORT_SYMBOL(disable_irq_nosync);
-
-void disable_irq(unsigned int irq)
-{
-	__disable_irq(irq);
-}
-EXPORT_SYMBOL(disable_irq);
-
-void enable_irq(unsigned int irq)
-{
-	__enable_irq(irq);
-}
-EXPORT_SYMBOL(enable_irq);
-
-/*
- * 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);
-
-static unsigned int build_device_irq(struct platform_device *op,
-                                     unsigned int real_irq)
-{
-	return real_irq;
-}
-
 /* djhr
  * This could probably be made indirect too and assigned in the CPU
  * bits of the code. That would be much nicer I think and would also
@@ -598,8 +344,6 @@
 
 void __init init_IRQ(void)
 {
-	sparc_irq_config.build_device_irq = build_device_irq;
-
 	switch (sparc_cpu_model) {
 	case sun4c:
 	case sun4:
@@ -607,14 +351,11 @@
 		break;
 
 	case sun4m:
-#ifdef CONFIG_PCI
 		pcic_probe();
-		if (pcic_present()) {
+		if (pcic_present())
 			sun4m_pci_init_IRQ();
-			break;
-		}
-#endif
-		sun4m_init_IRQ();
+		else
+			sun4m_init_IRQ();
 		break;
 
 	case sun4d:
@@ -632,9 +373,3 @@
 	btfixup();
 }
 
-#ifdef CONFIG_PROC_FS
-void init_irq_proc(void)
-{
-	/* For now, nothing... */
-}
-#endif /* CONFIG_PROC_FS */
diff --git a/arch/sparc/kernel/irq_64.c b/arch/sparc/kernel/irq_64.c
index b1d275c..4e78862 100644
--- a/arch/sparc/kernel/irq_64.c
+++ b/arch/sparc/kernel/irq_64.c
@@ -224,13 +224,13 @@
 	int cpuid;
 
 	cpumask_copy(&mask, affinity);
-	if (cpus_equal(mask, cpu_online_map)) {
+	if (cpumask_equal(&mask, cpu_online_mask)) {
 		cpuid = map_to_cpu(irq);
 	} else {
 		cpumask_t tmp;
 
-		cpus_and(tmp, cpu_online_map, mask);
-		cpuid = cpus_empty(tmp) ? map_to_cpu(irq) : first_cpu(tmp);
+		cpumask_and(&tmp, cpu_online_mask, &mask);
+		cpuid = cpumask_empty(&tmp) ? map_to_cpu(irq) : cpumask_first(&tmp);
 	}
 
 	return cpuid;
diff --git a/arch/sparc/kernel/kernel.h b/arch/sparc/kernel/kernel.h
index 24ad449..6f6544c 100644
--- a/arch/sparc/kernel/kernel.h
+++ b/arch/sparc/kernel/kernel.h
@@ -6,11 +6,9 @@
 #include <asm/traps.h>
 
 /* cpu.c */
-extern const char *sparc_cpu_type;
 extern const char *sparc_pmu_type;
-extern const char *sparc_fpu_type;
-
 extern unsigned int fsr_storage;
+extern int ncpus_probed;
 
 #ifdef CONFIG_SPARC32
 /* cpu.c */
@@ -37,6 +35,7 @@
 extern unsigned int lvl14_resolution;
 
 extern void sun4m_init_IRQ(void);
+extern void sun4m_unmask_profile_irq(void);
 extern void sun4m_clear_profile_irq(int cpu);
 
 /* sun4d_irq.c */
diff --git a/arch/sparc/kernel/leon_kernel.c b/arch/sparc/kernel/leon_kernel.c
index 2969f77..2f538ac 100644
--- a/arch/sparc/kernel/leon_kernel.c
+++ b/arch/sparc/kernel/leon_kernel.c
@@ -19,53 +19,70 @@
 #include <asm/leon_amba.h>
 #include <asm/traps.h>
 #include <asm/cacheflush.h>
+#include <asm/smp.h>
+#include <asm/setup.h>
 
 #include "prom.h"
 #include "irq.h"
 
 struct leon3_irqctrl_regs_map *leon3_irqctrl_regs; /* interrupt controller base address */
 struct leon3_gptimer_regs_map *leon3_gptimer_regs; /* timer controller base address */
-struct amba_apb_device leon_percpu_timer_dev[16];
 
 int leondebug_irq_disable;
 int leon_debug_irqout;
 static int dummy_master_l10_counter;
 unsigned long amba_system_id;
+static DEFINE_SPINLOCK(leon_irq_lock);
 
 unsigned long leon3_gptimer_irq; /* interrupt controller irq number */
 unsigned long leon3_gptimer_idx; /* Timer Index (0..6) within Timer Core */
+int leon3_ticker_irq; /* Timer ticker IRQ */
 unsigned int sparc_leon_eirq;
-#define LEON_IMASK ((&leon3_irqctrl_regs->mask[0]))
+#define LEON_IMASK(cpu) (&leon3_irqctrl_regs->mask[cpu])
+#define LEON_IACK (&leon3_irqctrl_regs->iclear)
+#define LEON_DO_ACK_HW 1
 
-/* Return the IRQ of the pending IRQ on the extended IRQ controller */
-int sparc_leon_eirq_get(int eirq, int cpu)
+/* Return the last ACKed IRQ by the Extended IRQ controller. It has already
+ * been (automatically) ACKed when the CPU takes the trap.
+ */
+static inline unsigned int leon_eirq_get(int cpu)
 {
 	return LEON3_BYPASS_LOAD_PA(&leon3_irqctrl_regs->intid[cpu]) & 0x1f;
 }
 
-irqreturn_t sparc_leon_eirq_isr(int dummy, void *dev_id)
+/* Handle one or multiple IRQs from the extended interrupt controller */
+static void leon_handle_ext_irq(unsigned int irq, struct irq_desc *desc)
 {
-	printk(KERN_ERR "sparc_leon_eirq_isr: ERROR EXTENDED IRQ\n");
-	return IRQ_HANDLED;
+	unsigned int eirq;
+	int cpu = sparc_leon3_cpuid();
+
+	eirq = leon_eirq_get(cpu);
+	if ((eirq & 0x10) && irq_map[eirq]->irq) /* bit4 tells if IRQ happened */
+		generic_handle_irq(irq_map[eirq]->irq);
 }
 
 /* The extended IRQ controller has been found, this function registers it */
-void sparc_leon_eirq_register(int eirq)
+void leon_eirq_setup(unsigned int eirq)
 {
-	int irq;
+	unsigned long mask, oldmask;
+	unsigned int veirq;
 
-	/* Register a "BAD" handler for this interrupt, it should never happen */
-	irq = request_irq(eirq, sparc_leon_eirq_isr,
-			  (IRQF_DISABLED | SA_STATIC_ALLOC), "extirq", NULL);
-
-	if (irq) {
-		printk(KERN_ERR
-		       "sparc_leon_eirq_register: unable to attach IRQ%d\n",
-		       eirq);
-	} else {
-		sparc_leon_eirq = eirq;
+	if (eirq < 1 || eirq > 0xf) {
+		printk(KERN_ERR "LEON EXT IRQ NUMBER BAD: %d\n", eirq);
+		return;
 	}
 
+	veirq = leon_build_device_irq(eirq, leon_handle_ext_irq, "extirq", 0);
+
+	/*
+	 * Unmask the Extended IRQ, the IRQs routed through the Ext-IRQ
+	 * controller have a mask-bit of their own, so this is safe.
+	 */
+	irq_link(veirq);
+	mask = 1 << eirq;
+	oldmask = LEON3_BYPASS_LOAD_PA(LEON_IMASK(boot_cpu_id));
+	LEON3_BYPASS_STORE_PA(LEON_IMASK(boot_cpu_id), (oldmask | mask));
+	sparc_leon_eirq = eirq;
 }
 
 static inline unsigned long get_irqmask(unsigned int irq)
@@ -83,35 +100,151 @@
 	return mask;
 }
 
-static void leon_enable_irq(unsigned int irq_nr)
+#ifdef CONFIG_SMP
+static int irq_choose_cpu(const struct cpumask *affinity)
 {
-	unsigned long mask, flags;
-	mask = get_irqmask(irq_nr);
-	local_irq_save(flags);
-	LEON3_BYPASS_STORE_PA(LEON_IMASK,
-			      (LEON3_BYPASS_LOAD_PA(LEON_IMASK) | (mask)));
-	local_irq_restore(flags);
+	cpumask_t mask;
+
+	cpus_and(mask, cpu_online_map, *affinity);
+	if (cpus_equal(mask, cpu_online_map) || cpus_empty(mask))
+		return boot_cpu_id;
+	else
+		return first_cpu(mask);
+}
+#else
+#define irq_choose_cpu(affinity) boot_cpu_id
+#endif
+
+static int leon_set_affinity(struct irq_data *data, const struct cpumask *dest,
+			     bool force)
+{
+	unsigned long mask, oldmask, flags;
+	int oldcpu, newcpu;
+
+	mask = (unsigned long)data->chip_data;
+	oldcpu = irq_choose_cpu(data->affinity);
+	newcpu = irq_choose_cpu(dest);
+
+	if (oldcpu == newcpu)
+		goto out;
+
+	/* unmask on old CPU first before enabling on the selected CPU */
+	spin_lock_irqsave(&leon_irq_lock, flags);
+	oldmask = LEON3_BYPASS_LOAD_PA(LEON_IMASK(oldcpu));
+	LEON3_BYPASS_STORE_PA(LEON_IMASK(oldcpu), (oldmask & ~mask));
+	oldmask = LEON3_BYPASS_LOAD_PA(LEON_IMASK(newcpu));
+	LEON3_BYPASS_STORE_PA(LEON_IMASK(newcpu), (oldmask | mask));
+	spin_unlock_irqrestore(&leon_irq_lock, flags);
+out:
+	return IRQ_SET_MASK_OK;
 }
 
-static void leon_disable_irq(unsigned int irq_nr)
+static void leon_unmask_irq(struct irq_data *data)
 {
-	unsigned long mask, flags;
-	mask = get_irqmask(irq_nr);
-	local_irq_save(flags);
-	LEON3_BYPASS_STORE_PA(LEON_IMASK,
-			      (LEON3_BYPASS_LOAD_PA(LEON_IMASK) & ~(mask)));
-	local_irq_restore(flags);
+	unsigned long mask, oldmask, flags;
+	int cpu;
 
+	mask = (unsigned long)data->chip_data;
+	cpu = irq_choose_cpu(data->affinity);
+	spin_lock_irqsave(&leon_irq_lock, flags);
+	oldmask = LEON3_BYPASS_LOAD_PA(LEON_IMASK(cpu));
+	LEON3_BYPASS_STORE_PA(LEON_IMASK(cpu), (oldmask | mask));
+	spin_unlock_irqrestore(&leon_irq_lock, flags);
+}
+
+static void leon_mask_irq(struct irq_data *data)
+{
+	unsigned long mask, oldmask, flags;
+	int cpu;
+
+	mask = (unsigned long)data->chip_data;
+	cpu = irq_choose_cpu(data->affinity);
+	spin_lock_irqsave(&leon_irq_lock, flags);
+	oldmask = LEON3_BYPASS_LOAD_PA(LEON_IMASK(cpu));
+	LEON3_BYPASS_STORE_PA(LEON_IMASK(cpu), (oldmask & ~mask));
+	spin_unlock_irqrestore(&leon_irq_lock, flags);
+}
+
+static unsigned int leon_startup_irq(struct irq_data *data)
+{
+	irq_link(data->irq);
+	leon_unmask_irq(data);
+	return 0;
+}
+
+static void leon_shutdown_irq(struct irq_data *data)
+{
+	leon_mask_irq(data);
+	irq_unlink(data->irq);
+}
+
+/* Used by external level sensitive IRQ handlers on the LEON: ACK IRQ ctrl */
+static void leon_eoi_irq(struct irq_data *data)
+{
+	unsigned long mask = (unsigned long)data->chip_data;
+
+	if (mask & LEON_DO_ACK_HW)
+		LEON3_BYPASS_STORE_PA(LEON_IACK, mask & ~LEON_DO_ACK_HW);
+}
+
+static struct irq_chip leon_irq = {
+	.name			= "leon",
+	.irq_startup		= leon_startup_irq,
+	.irq_shutdown		= leon_shutdown_irq,
+	.irq_mask		= leon_mask_irq,
+	.irq_unmask		= leon_unmask_irq,
+	.irq_eoi		= leon_eoi_irq,
+	.irq_set_affinity	= leon_set_affinity,
+};
+
+/*
+ * Build a LEON IRQ for the edge triggered LEON IRQ controller:
+ *  Edge (normal) IRQ           - handle_simple_irq, ack=DONT-CARE, never ack
+ *  Level IRQ (PCI|Level-GPIO)  - handle_fasteoi_irq, ack=1, ack after ISR
+ *  Per-CPU Edge                - handle_percpu_irq, ack=0
+ */
+unsigned int leon_build_device_irq(unsigned int real_irq,
+				    irq_flow_handler_t flow_handler,
+				    const char *name, int do_ack)
+{
+	unsigned int irq;
+	unsigned long mask;
+
+	irq = 0;
+	mask = get_irqmask(real_irq);
+	if (mask == 0)
+		goto out;
+
+	irq = irq_alloc(real_irq, real_irq);
+	if (irq == 0)
+		goto out;
+
+	if (do_ack)
+		mask |= LEON_DO_ACK_HW;
+
+	irq_set_chip_and_handler_name(irq, &leon_irq,
+				      flow_handler, name);
+	irq_set_chip_data(irq, (void *)mask);
+
+out:
+	return irq;
+}
+
+static unsigned int _leon_build_device_irq(struct platform_device *op,
+					   unsigned int real_irq)
+{
+	return leon_build_device_irq(real_irq, handle_simple_irq, "edge", 0);
 }
 
 void __init leon_init_timers(irq_handler_t counter_fn)
 {
-	int irq;
+	int irq, eirq;
 	struct device_node *rootnp, *np, *nnp;
 	struct property *pp;
 	int len;
-	int cpu, icsel;
+	int icsel;
 	int ampopts;
+	int err;
 
 	leondebug_irq_disable = 0;
 	leon_debug_irqout = 0;
@@ -173,98 +306,85 @@
 			leon3_gptimer_irq = *(unsigned int *)pp->value;
 	} while (0);
 
-	if (leon3_gptimer_regs && leon3_irqctrl_regs && leon3_gptimer_irq) {
-		LEON3_BYPASS_STORE_PA(
-			&leon3_gptimer_regs->e[leon3_gptimer_idx].val, 0);
-		LEON3_BYPASS_STORE_PA(
-			&leon3_gptimer_regs->e[leon3_gptimer_idx].rld,
-			(((1000000 / HZ) - 1)));
-		LEON3_BYPASS_STORE_PA(
+	if (!(leon3_gptimer_regs && leon3_irqctrl_regs && leon3_gptimer_irq))
+		goto bad;
+
+	LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx].val, 0);
+	LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx].rld,
+				(((1000000 / HZ) - 1)));
+	LEON3_BYPASS_STORE_PA(
 			&leon3_gptimer_regs->e[leon3_gptimer_idx].ctrl, 0);
 
 #ifdef CONFIG_SMP
-		leon_percpu_timer_dev[0].start = (int)leon3_gptimer_regs;
-		leon_percpu_timer_dev[0].irq = leon3_gptimer_irq + 1 +
-					       leon3_gptimer_idx;
+	leon3_ticker_irq = leon3_gptimer_irq + 1 + leon3_gptimer_idx;
 
-		if (!(LEON3_BYPASS_LOAD_PA(&leon3_gptimer_regs->config) &
-		      (1<<LEON3_GPTIMER_SEPIRQ))) {
-			prom_printf("irq timer not configured with separate irqs\n");
-			BUG();
-		}
-
-		LEON3_BYPASS_STORE_PA(
-			&leon3_gptimer_regs->e[leon3_gptimer_idx+1].val, 0);
-		LEON3_BYPASS_STORE_PA(
-			&leon3_gptimer_regs->e[leon3_gptimer_idx+1].rld,
-			(((1000000/HZ) - 1)));
-		LEON3_BYPASS_STORE_PA(
-			&leon3_gptimer_regs->e[leon3_gptimer_idx+1].ctrl, 0);
-# endif
-
-		/*
-		 * The IRQ controller may (if implemented) consist of multiple
-		 * IRQ controllers, each mapped on a 4Kb boundary.
-		 * Each CPU may be routed to different IRQCTRLs, however
-		 * we assume that all CPUs (in SMP system) is routed to the
-		 * same IRQ Controller, and for non-SMP only one IRQCTRL is
-		 * accessed anyway.
-		 * In AMP systems, Linux must run on CPU0 for the time being.
-		 */
-		cpu = sparc_leon3_cpuid();
-		icsel = LEON3_BYPASS_LOAD_PA(&leon3_irqctrl_regs->icsel[cpu/8]);
-		icsel = (icsel >> ((7 - (cpu&0x7)) * 4)) & 0xf;
-		leon3_irqctrl_regs += icsel;
-	} else {
-		goto bad;
+	if (!(LEON3_BYPASS_LOAD_PA(&leon3_gptimer_regs->config) &
+	      (1<<LEON3_GPTIMER_SEPIRQ))) {
+		printk(KERN_ERR "timer not configured with separate irqs\n");
+		BUG();
 	}
 
-	irq = request_irq(leon3_gptimer_irq+leon3_gptimer_idx,
-			  counter_fn,
-			  (IRQF_DISABLED | SA_STATIC_ALLOC), "timer", NULL);
+	LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx+1].val,
+				0);
+	LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx+1].rld,
+				(((1000000/HZ) - 1)));
+	LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx+1].ctrl,
+				0);
+#endif
 
-	if (irq) {
-		printk(KERN_ERR "leon_time_init: unable to attach IRQ%d\n",
-		       LEON_INTERRUPT_TIMER1);
+	/*
+	 * The IRQ controller may (if implemented) consist of multiple
+	 * IRQ controllers, each mapped on a 4Kb boundary.
+	 * Each CPU may be routed to different IRQCTRLs, however
+	 * we assume that all CPUs (in SMP system) is routed to the
+	 * same IRQ Controller, and for non-SMP only one IRQCTRL is
+	 * accessed anyway.
+	 * In AMP systems, Linux must run on CPU0 for the time being.
+	 */
+	icsel = LEON3_BYPASS_LOAD_PA(&leon3_irqctrl_regs->icsel[boot_cpu_id/8]);
+	icsel = (icsel >> ((7 - (boot_cpu_id&0x7)) * 4)) & 0xf;
+	leon3_irqctrl_regs += icsel;
+
+	/* Mask all IRQs on boot-cpu IRQ controller */
+	LEON3_BYPASS_STORE_PA(&leon3_irqctrl_regs->mask[boot_cpu_id], 0);
+
+	/* Probe extended IRQ controller */
+	eirq = (LEON3_BYPASS_LOAD_PA(&leon3_irqctrl_regs->mpstatus)
+		>> 16) & 0xf;
+	if (eirq != 0)
+		leon_eirq_setup(eirq);
+
+	irq = _leon_build_device_irq(NULL, leon3_gptimer_irq+leon3_gptimer_idx);
+	err = request_irq(irq, counter_fn, IRQF_TIMER, "timer", NULL);
+	if (err) {
+		printk(KERN_ERR "unable to attach timer IRQ%d\n", irq);
 		prom_halt();
 	}
 
-# ifdef CONFIG_SMP
-	{
-		unsigned long flags;
-		struct tt_entry *trap_table = &sparc_ttable[SP_TRAP_IRQ1 + (leon_percpu_timer_dev[0].irq - 1)];
-
-		/* For SMP we use the level 14 ticker, however the bootup code
-		 * has copied the firmwares level 14 vector into boot cpu's
-		 * trap table, we must fix this now or we get squashed.
-		 */
-		local_irq_save(flags);
-
-		patchme_maybe_smp_msg[0] = 0x01000000; /* NOP out the branch */
-
-		/* Adjust so that we jump directly to smpleon_ticker */
-		trap_table->inst_three += smpleon_ticker - real_irq_entry;
-
-		local_flush_cache_all();
-		local_irq_restore(flags);
-	}
-# endif
-
-	if (leon3_gptimer_regs) {
-		LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx].ctrl,
-				      LEON3_GPTIMER_EN |
-				      LEON3_GPTIMER_RL |
-				      LEON3_GPTIMER_LD | LEON3_GPTIMER_IRQEN);
+	LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx].ctrl,
+			      LEON3_GPTIMER_EN |
+			      LEON3_GPTIMER_RL |
+			      LEON3_GPTIMER_LD |
+			      LEON3_GPTIMER_IRQEN);
 
 #ifdef CONFIG_SMP
-		LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx+1].ctrl,
-				      LEON3_GPTIMER_EN |
-				      LEON3_GPTIMER_RL |
-				      LEON3_GPTIMER_LD |
-				      LEON3_GPTIMER_IRQEN);
-#endif
-
+	/* Install per-cpu IRQ handler for broadcasted ticker */
+	irq = leon_build_device_irq(leon3_ticker_irq, handle_percpu_irq,
+				    "per-cpu", 0);
+	err = request_irq(irq, leon_percpu_timer_interrupt,
+			  IRQF_PERCPU | IRQF_TIMER, "ticker",
+			  NULL);
+	if (err) {
+		printk(KERN_ERR "unable to attach ticker IRQ%d\n", irq);
+		prom_halt();
 	}
+
+	LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx+1].ctrl,
+			      LEON3_GPTIMER_EN |
+			      LEON3_GPTIMER_RL |
+			      LEON3_GPTIMER_LD |
+			      LEON3_GPTIMER_IRQEN);
+#endif
 	return;
 bad:
 	printk(KERN_ERR "No Timer/irqctrl found\n");
@@ -281,9 +401,6 @@
 	BUG();
 }
 
-
-
-
 void __init leon_trans_init(struct device_node *dp)
 {
 	if (strcmp(dp->type, "cpu") == 0 && strcmp(dp->name, "<NULL>") == 0) {
@@ -337,22 +454,18 @@
 {
 	unsigned long mask, flags, *addr;
 	mask = get_irqmask(irq_nr);
-	local_irq_save(flags);
-	addr = (unsigned long *)&(leon3_irqctrl_regs->mask[cpu]);
-	LEON3_BYPASS_STORE_PA(addr, (LEON3_BYPASS_LOAD_PA(addr) | (mask)));
-	local_irq_restore(flags);
+	spin_lock_irqsave(&leon_irq_lock, flags);
+	addr = (unsigned long *)LEON_IMASK(cpu);
+	LEON3_BYPASS_STORE_PA(addr, (LEON3_BYPASS_LOAD_PA(addr) | mask));
+	spin_unlock_irqrestore(&leon_irq_lock, flags);
 }
 
 #endif
 
 void __init leon_init_IRQ(void)
 {
-	sparc_irq_config.init_timers = leon_init_timers;
-
-	BTFIXUPSET_CALL(enable_irq, leon_enable_irq, BTFIXUPCALL_NORM);
-	BTFIXUPSET_CALL(disable_irq, leon_disable_irq, BTFIXUPCALL_NORM);
-	BTFIXUPSET_CALL(enable_pil_irq, leon_enable_irq, BTFIXUPCALL_NORM);
-	BTFIXUPSET_CALL(disable_pil_irq, leon_disable_irq, BTFIXUPCALL_NORM);
+	sparc_irq_config.init_timers      = leon_init_timers;
+	sparc_irq_config.build_device_irq = _leon_build_device_irq;
 
 	BTFIXUPSET_CALL(clear_clock_irq, leon_clear_clock_irq,
 			BTFIXUPCALL_NORM);
diff --git a/arch/sparc/kernel/leon_smp.c b/arch/sparc/kernel/leon_smp.c
index 8f5de4a..fe8fb44 100644
--- a/arch/sparc/kernel/leon_smp.c
+++ b/arch/sparc/kernel/leon_smp.c
@@ -14,6 +14,7 @@
 #include <linux/smp.h>
 #include <linux/interrupt.h>
 #include <linux/kernel_stat.h>
+#include <linux/of.h>
 #include <linux/init.h>
 #include <linux/spinlock.h>
 #include <linux/mm.h>
@@ -29,6 +30,7 @@
 #include <asm/ptrace.h>
 #include <asm/atomic.h>
 #include <asm/irq_regs.h>
+#include <asm/traps.h>
 
 #include <asm/delay.h>
 #include <asm/irq.h>
@@ -50,9 +52,12 @@
 extern ctxd_t *srmmu_ctx_table_phys;
 static int smp_processors_ready;
 extern volatile unsigned long cpu_callin_map[NR_CPUS];
-extern unsigned char boot_cpu_id;
 extern cpumask_t smp_commenced_mask;
 void __init leon_configure_cache_smp(void);
+static void leon_ipi_init(void);
+
+/* IRQ number of LEON IPIs */
+int leon_ipi_irq = LEON3_IRQ_IPI_DEFAULT;
 
 static inline unsigned long do_swap(volatile unsigned long *ptr,
 				    unsigned long val)
@@ -94,8 +99,6 @@
 	local_flush_cache_all();
 	local_flush_tlb_all();
 
-	cpu_probe();
-
 	/* Fix idle thread fields. */
 	__asm__ __volatile__("ld [%0], %%g6\n\t" : : "r"(&current_set[cpuid])
 			     : "memory" /* paranoid */);
@@ -104,11 +107,11 @@
 	atomic_inc(&init_mm.mm_count);
 	current->active_mm = &init_mm;
 
-	while (!cpu_isset(cpuid, smp_commenced_mask))
+	while (!cpumask_test_cpu(cpuid, &smp_commenced_mask))
 		mb();
 
 	local_irq_enable();
-	cpu_set(cpuid, cpu_online_map);
+	set_cpu_online(cpuid, true);
 }
 
 /*
@@ -179,13 +182,16 @@
 	int nrcpu = leon_smp_nrcpus();
 	int me = smp_processor_id();
 
+	/* Setup IPI */
+	leon_ipi_init();
+
 	printk(KERN_INFO "%d:(%d:%d) cpus mpirq at 0x%x\n", (unsigned int)me,
 	       (unsigned int)nrcpu, (unsigned int)NR_CPUS,
 	       (unsigned int)&(leon3_irqctrl_regs->mpstatus));
 
 	leon_enable_irq_cpu(LEON3_IRQ_CROSS_CALL, me);
 	leon_enable_irq_cpu(LEON3_IRQ_TICKER, me);
-	leon_enable_irq_cpu(LEON3_IRQ_RESCHEDULE, me);
+	leon_enable_irq_cpu(leon_ipi_irq, me);
 
 	leon_smp_setbroadcast(1 << LEON3_IRQ_TICKER);
 
@@ -220,6 +226,10 @@
 	       (unsigned int)&leon3_irqctrl_regs->mpstatus);
 	local_flush_cache_all();
 
+	/* Make sure all IRQs are of from the start for this new CPU */
+	LEON_BYPASS_STORE_PA(&leon3_irqctrl_regs->mask[i], 0);
+
+	/* Wake one CPU */
 	LEON_BYPASS_STORE_PA(&(leon3_irqctrl_regs->mpstatus), 1 << i);
 
 	/* wheee... it's going... */
@@ -236,7 +246,7 @@
 	} else {
 		leon_enable_irq_cpu(LEON3_IRQ_CROSS_CALL, i);
 		leon_enable_irq_cpu(LEON3_IRQ_TICKER, i);
-		leon_enable_irq_cpu(LEON3_IRQ_RESCHEDULE, i);
+		leon_enable_irq_cpu(leon_ipi_irq, i);
 	}
 
 	local_flush_cache_all();
@@ -262,21 +272,21 @@
 	local_flush_cache_all();
 
 	/* Free unneeded trap tables */
-	if (!cpu_isset(1, cpu_present_map)) {
+	if (!cpu_present(1)) {
 		ClearPageReserved(virt_to_page(&trapbase_cpu1));
 		init_page_count(virt_to_page(&trapbase_cpu1));
 		free_page((unsigned long)&trapbase_cpu1);
 		totalram_pages++;
 		num_physpages++;
 	}
-	if (!cpu_isset(2, cpu_present_map)) {
+	if (!cpu_present(2)) {
 		ClearPageReserved(virt_to_page(&trapbase_cpu2));
 		init_page_count(virt_to_page(&trapbase_cpu2));
 		free_page((unsigned long)&trapbase_cpu2);
 		totalram_pages++;
 		num_physpages++;
 	}
-	if (!cpu_isset(3, cpu_present_map)) {
+	if (!cpu_present(3)) {
 		ClearPageReserved(virt_to_page(&trapbase_cpu3));
 		init_page_count(virt_to_page(&trapbase_cpu3));
 		free_page((unsigned long)&trapbase_cpu3);
@@ -292,6 +302,99 @@
 {
 }
 
+struct leon_ipi_work {
+	int single;
+	int msk;
+	int resched;
+};
+
+static DEFINE_PER_CPU_SHARED_ALIGNED(struct leon_ipi_work, leon_ipi_work);
+
+/* Initialize IPIs on the LEON, in order to save IRQ resources only one IRQ
+ * is used for all three types of IPIs.
+ */
+static void __init leon_ipi_init(void)
+{
+	int cpu, len;
+	struct leon_ipi_work *work;
+	struct property *pp;
+	struct device_node *rootnp;
+	struct tt_entry *trap_table;
+	unsigned long flags;
+
+	/* Find IPI IRQ or stick with default value */
+	rootnp = of_find_node_by_path("/ambapp0");
+	if (rootnp) {
+		pp = of_find_property(rootnp, "ipi_num", &len);
+		if (pp && (*(int *)pp->value))
+			leon_ipi_irq = *(int *)pp->value;
+	}
+	printk(KERN_INFO "leon: SMP IPIs at IRQ %d\n", leon_ipi_irq);
+
+	/* Adjust so that we jump directly to smpleon_ipi */
+	local_irq_save(flags);
+	trap_table = &sparc_ttable[SP_TRAP_IRQ1 + (leon_ipi_irq - 1)];
+	trap_table->inst_three += smpleon_ipi - real_irq_entry;
+	local_flush_cache_all();
+	local_irq_restore(flags);
+
+	for_each_possible_cpu(cpu) {
+		work = &per_cpu(leon_ipi_work, cpu);
+		work->single = work->msk = work->resched = 0;
+	}
+}
+
+static void leon_ipi_single(int cpu)
+{
+	struct leon_ipi_work *work = &per_cpu(leon_ipi_work, cpu);
+
+	/* Mark work */
+	work->single = 1;
+
+	/* Generate IRQ on the CPU */
+	set_cpu_int(cpu, leon_ipi_irq);
+}
+
+static void leon_ipi_mask_one(int cpu)
+{
+	struct leon_ipi_work *work = &per_cpu(leon_ipi_work, cpu);
+
+	/* Mark work */
+	work->msk = 1;
+
+	/* Generate IRQ on the CPU */
+	set_cpu_int(cpu, leon_ipi_irq);
+}
+
+static void leon_ipi_resched(int cpu)
+{
+	struct leon_ipi_work *work = &per_cpu(leon_ipi_work, cpu);
+
+	/* Mark work */
+	work->resched = 1;
+
+	/* Generate IRQ on the CPU (any IRQ will cause resched) */
+	set_cpu_int(cpu, leon_ipi_irq);
+}
+
+void leonsmp_ipi_interrupt(void)
+{
+	struct leon_ipi_work *work = &__get_cpu_var(leon_ipi_work);
+
+	if (work->single) {
+		work->single = 0;
+		smp_call_function_single_interrupt();
+	}
+	if (work->msk) {
+		work->msk = 0;
+		smp_call_function_interrupt();
+	}
+	if (work->resched) {
+		work->resched = 0;
+		smp_resched_interrupt();
+	}
+}
+
 static struct smp_funcall {
 	smpfunc_t func;
 	unsigned long arg1;
@@ -337,10 +440,10 @@
 		{
 			register int i;
 
-			cpu_clear(smp_processor_id(), mask);
-			cpus_and(mask, cpu_online_map, mask);
+			cpumask_clear_cpu(smp_processor_id(), &mask);
+			cpumask_and(&mask, cpu_online_mask, &mask);
 			for (i = 0; i <= high; i++) {
-				if (cpu_isset(i, mask)) {
+				if (cpumask_test_cpu(i, &mask)) {
 					ccall_info.processors_in[i] = 0;
 					ccall_info.processors_out[i] = 0;
 					set_cpu_int(i, LEON3_IRQ_CROSS_CALL);
@@ -354,7 +457,7 @@
 
 			i = 0;
 			do {
-				if (!cpu_isset(i, mask))
+				if (!cpumask_test_cpu(i, &mask))
 					continue;
 
 				while (!ccall_info.processors_in[i])
@@ -363,7 +466,7 @@
 
 			i = 0;
 			do {
-				if (!cpu_isset(i, mask))
+				if (!cpumask_test_cpu(i, &mask))
 					continue;
 
 				while (!ccall_info.processors_out[i])
@@ -386,27 +489,23 @@
 	ccall_info.processors_out[i] = 1;
 }
 
-void leon_percpu_timer_interrupt(struct pt_regs *regs)
+irqreturn_t leon_percpu_timer_interrupt(int irq, void *unused)
 {
-	struct pt_regs *old_regs;
 	int cpu = smp_processor_id();
 
-	old_regs = set_irq_regs(regs);
-
 	leon_clear_profile_irq(cpu);
 
 	profile_tick(CPU_PROFILING);
 
 	if (!--prof_counter(cpu)) {
-		int user = user_mode(regs);
+		int user = user_mode(get_irq_regs());
 
-		irq_enter();
 		update_process_times(user);
-		irq_exit();
 
 		prof_counter(cpu) = prof_multiplier(cpu);
 	}
-	set_irq_regs(old_regs);
+
+	return IRQ_HANDLED;
 }
 
 static void __init smp_setup_percpu_timer(void)
@@ -449,6 +548,9 @@
 	BTFIXUPSET_CALL(smp_cross_call, leon_cross_call, BTFIXUPCALL_NORM);
 	BTFIXUPSET_CALL(__hard_smp_processor_id, __leon_processor_id,
 			BTFIXUPCALL_NORM);
+	BTFIXUPSET_CALL(smp_ipi_resched, leon_ipi_resched, BTFIXUPCALL_NORM);
+	BTFIXUPSET_CALL(smp_ipi_single, leon_ipi_single, BTFIXUPCALL_NORM);
+	BTFIXUPSET_CALL(smp_ipi_mask_one, leon_ipi_mask_one, BTFIXUPCALL_NORM);
 }
 
 #endif /* CONFIG_SPARC_LEON */
diff --git a/arch/sparc/kernel/mdesc.c b/arch/sparc/kernel/mdesc.c
index 56db064..42f28c7 100644
--- a/arch/sparc/kernel/mdesc.c
+++ b/arch/sparc/kernel/mdesc.c
@@ -768,7 +768,7 @@
 			       cpuid, NR_CPUS);
 			continue;
 		}
-		if (!cpu_isset(cpuid, *mask))
+		if (!cpumask_test_cpu(cpuid, mask))
 			continue;
 #endif
 
diff --git a/arch/sparc/kernel/of_device_64.c b/arch/sparc/kernel/of_device_64.c
index 5c14968..3bb2eac 100644
--- a/arch/sparc/kernel/of_device_64.c
+++ b/arch/sparc/kernel/of_device_64.c
@@ -622,8 +622,9 @@
 out:
 	nid = of_node_to_nid(dp);
 	if (nid != -1) {
-		cpumask_t numa_mask = *cpumask_of_node(nid);
+		cpumask_t numa_mask;
 
+		cpumask_copy(&numa_mask, cpumask_of_node(nid));
 		irq_set_affinity(irq, &numa_mask);
 	}
 
diff --git a/arch/sparc/kernel/pci_msi.c b/arch/sparc/kernel/pci_msi.c
index 30982e9..580651a 100644
--- a/arch/sparc/kernel/pci_msi.c
+++ b/arch/sparc/kernel/pci_msi.c
@@ -284,8 +284,9 @@
 
 	nid = pbm->numa_node;
 	if (nid != -1) {
-		cpumask_t numa_mask = *cpumask_of_node(nid);
+		cpumask_t numa_mask;
 
+		cpumask_copy(&numa_mask, cpumask_of_node(nid));
 		irq_set_affinity(irq, &numa_mask);
 	}
 	err = request_irq(irq, sparc64_msiq_interrupt, 0,
diff --git a/arch/sparc/kernel/pcic.c b/arch/sparc/kernel/pcic.c
index 2cdc131..948601a 100644
--- a/arch/sparc/kernel/pcic.c
+++ b/arch/sparc/kernel/pcic.c
@@ -164,6 +164,9 @@
 volatile int pcic_speculative;
 volatile int pcic_trapped;
 
+/* forward */
+unsigned int pcic_build_device_irq(struct platform_device *op,
+                                   unsigned int real_irq);
 
 #define CONFIG_CMD(bus, device_fn, where) (0x80000000 | (((unsigned int)bus) << 16) | (((unsigned int)device_fn) << 8) | (where & ~3))
 
@@ -523,6 +526,7 @@
 pcic_fill_irq(struct linux_pcic *pcic, struct pci_dev *dev, int node)
 {
 	struct pcic_ca2irq *p;
+	unsigned int real_irq;
 	int i, ivec;
 	char namebuf[64];
 
@@ -551,26 +555,25 @@
 	i = p->pin;
 	if (i >= 0 && i < 4) {
 		ivec = readw(pcic->pcic_regs+PCI_INT_SELECT_LO);
-		dev->irq = ivec >> (i << 2) & 0xF;
+		real_irq = ivec >> (i << 2) & 0xF;
 	} else if (i >= 4 && i < 8) {
 		ivec = readw(pcic->pcic_regs+PCI_INT_SELECT_HI);
-		dev->irq = ivec >> ((i-4) << 2) & 0xF;
+		real_irq = ivec >> ((i-4) << 2) & 0xF;
 	} else {					/* Corrupted map */
 		printk("PCIC: BAD PIN %d\n", i); for (;;) {}
 	}
 /* P3 */ /* printk("PCIC: device %s pin %d ivec 0x%x irq %x\n", namebuf, i, ivec, dev->irq); */
 
-	/*
-	 * dev->irq=0 means PROM did not bother to program the upper
+	/* real_irq means PROM did not bother to program the upper
 	 * half of PCIC. This happens on JS-E with PROM 3.11, for instance.
 	 */
-	if (dev->irq == 0 || p->force) {
+	if (real_irq == 0 || p->force) {
 		if (p->irq == 0 || p->irq >= 15) {	/* Corrupted map */
 			printk("PCIC: BAD IRQ %d\n", p->irq); for (;;) {}
 		}
 		printk("PCIC: setting irq %d at pin %d for device %02x:%02x\n",
 		    p->irq, p->pin, dev->bus->number, dev->devfn);
-		dev->irq = p->irq;
+		real_irq = p->irq;
 
 		i = p->pin;
 		if (i >= 4) {
@@ -584,7 +587,8 @@
 			ivec |= p->irq << (i << 2);
 			writew(ivec, pcic->pcic_regs+PCI_INT_SELECT_LO);
 		}
- 	}
+	}
+	dev->irq = pcic_build_device_irq(NULL, real_irq);
 }
 
 /*
@@ -729,6 +733,7 @@
 	struct linux_pcic *pcic = &pcic0;
 	unsigned long v;
 	int timer_irq, irq;
+	int err;
 
 	do_arch_gettimeoffset = pci_gettimeoffset;
 
@@ -740,9 +745,10 @@
 	timer_irq = PCI_COUNTER_IRQ_SYS(v);
 	writel (PCI_COUNTER_IRQ_SET(timer_irq, 0),
 		pcic->pcic_regs+PCI_COUNTER_IRQ);
-	irq = request_irq(timer_irq, pcic_timer_handler,
-			  (IRQF_DISABLED | SA_STATIC_ALLOC), "timer", NULL);
-	if (irq) {
+	irq = pcic_build_device_irq(NULL, timer_irq);
+	err = request_irq(irq, pcic_timer_handler,
+			  IRQF_TIMER, "timer", NULL);
+	if (err) {
 		prom_printf("time_init: unable to attach IRQ%d\n", timer_irq);
 		prom_halt();
 	}
@@ -803,50 +809,73 @@
 	return 1 << irq_nr;
 }
 
-static void pcic_disable_irq(unsigned int irq_nr)
+static void pcic_mask_irq(struct irq_data *data)
 {
 	unsigned long mask, flags;
 
-	mask = get_irqmask(irq_nr);
+	mask = (unsigned long)data->chip_data;
 	local_irq_save(flags);
 	writel(mask, pcic0.pcic_regs+PCI_SYS_INT_TARGET_MASK_SET);
 	local_irq_restore(flags);
 }
 
-static void pcic_enable_irq(unsigned int irq_nr)
+static void pcic_unmask_irq(struct irq_data *data)
 {
 	unsigned long mask, flags;
 
-	mask = get_irqmask(irq_nr);
+	mask = (unsigned long)data->chip_data;
 	local_irq_save(flags);
 	writel(mask, pcic0.pcic_regs+PCI_SYS_INT_TARGET_MASK_CLEAR);
 	local_irq_restore(flags);
 }
 
+static unsigned int pcic_startup_irq(struct irq_data *data)
+{
+	irq_link(data->irq);
+	pcic_unmask_irq(data);
+	return 0;
+}
+
+static struct irq_chip pcic_irq = {
+	.name		= "pcic",
+	.irq_startup	= pcic_startup_irq,
+	.irq_mask	= pcic_mask_irq,
+	.irq_unmask	= pcic_unmask_irq,
+};
+
+unsigned int pcic_build_device_irq(struct platform_device *op,
+                                   unsigned int real_irq)
+{
+	unsigned int irq;
+	unsigned long mask;
+
+	irq = 0;
+	mask = get_irqmask(real_irq);
+	if (mask == 0)
+		goto out;
+
+	irq = irq_alloc(real_irq, real_irq);
+	if (irq == 0)
+		goto out;
+
+	irq_set_chip_and_handler_name(irq, &pcic_irq,
+	                              handle_level_irq, "PCIC");
+	irq_set_chip_data(irq, (void *)mask);
+
+out:
+	return irq;
+}
+
+
 static void pcic_load_profile_irq(int cpu, unsigned int limit)
 {
 	printk("PCIC: unimplemented code: FILE=%s LINE=%d", __FILE__, __LINE__);
 }
 
-/* We assume the caller has disabled local interrupts when these are called,
- * or else very bizarre behavior will result.
- */
-static void pcic_disable_pil_irq(unsigned int pil)
-{
-	writel(get_irqmask(pil), pcic0.pcic_regs+PCI_SYS_INT_TARGET_MASK_SET);
-}
-
-static void pcic_enable_pil_irq(unsigned int pil)
-{
-	writel(get_irqmask(pil), pcic0.pcic_regs+PCI_SYS_INT_TARGET_MASK_CLEAR);
-}
-
 void __init sun4m_pci_init_IRQ(void)
 {
-	BTFIXUPSET_CALL(enable_irq, pcic_enable_irq, BTFIXUPCALL_NORM);
-	BTFIXUPSET_CALL(disable_irq, pcic_disable_irq, BTFIXUPCALL_NORM);
-	BTFIXUPSET_CALL(enable_pil_irq, pcic_enable_pil_irq, BTFIXUPCALL_NORM);
-	BTFIXUPSET_CALL(disable_pil_irq, pcic_disable_pil_irq, BTFIXUPCALL_NORM);
+	sparc_irq_config.build_device_irq = pcic_build_device_irq;
+
 	BTFIXUPSET_CALL(clear_clock_irq, pcic_clear_clock_irq, BTFIXUPCALL_NORM);
 	BTFIXUPSET_CALL(load_profile_irq, pcic_load_profile_irq, BTFIXUPCALL_NORM);
 }
diff --git a/arch/sparc/kernel/perf_event.c b/arch/sparc/kernel/perf_event.c
index ee8426e..2cb0e1c 100644
--- a/arch/sparc/kernel/perf_event.c
+++ b/arch/sparc/kernel/perf_event.c
@@ -26,6 +26,7 @@
 #include <asm/nmi.h>
 #include <asm/pcr.h>
 
+#include "kernel.h"
 #include "kstack.h"
 
 /* Sparc64 chips have two performance counters, 32-bits each, with
diff --git a/arch/sparc/kernel/process_32.c b/arch/sparc/kernel/process_32.c
index 1752929..c8cc461 100644
--- a/arch/sparc/kernel/process_32.c
+++ b/arch/sparc/kernel/process_32.c
@@ -128,8 +128,16 @@
         set_thread_flag(TIF_POLLING_NRFLAG);
 	/* endless idle loop with no priority at all */
 	while(1) {
-		while (!need_resched())
-			cpu_relax();
+#ifdef CONFIG_SPARC_LEON
+		if (pm_idle) {
+			while (!need_resched())
+				(*pm_idle)();
+		} else
+#endif
+		{
+			while (!need_resched())
+				cpu_relax();
+		}
 		preempt_enable_no_resched();
 		schedule();
 		preempt_disable();
diff --git a/arch/sparc/kernel/prom_32.c b/arch/sparc/kernel/prom_32.c
index 05fb253..5ce3d15 100644
--- a/arch/sparc/kernel/prom_32.c
+++ b/arch/sparc/kernel/prom_32.c
@@ -326,7 +326,6 @@
 			of_console_options = NULL;
 	}
 
-	prom_printf(msg, of_console_path);
 	printk(msg, of_console_path);
 }
 
diff --git a/arch/sparc/kernel/setup_32.c b/arch/sparc/kernel/setup_32.c
index 7b8b76c..3609bde 100644
--- a/arch/sparc/kernel/setup_32.c
+++ b/arch/sparc/kernel/setup_32.c
@@ -103,16 +103,20 @@
 /* Exported for mm/init.c:paging_init. */
 unsigned long cmdline_memory_size __initdata = 0;
 
+/* which CPU booted us (0xff = not set) */
+unsigned char boot_cpu_id = 0xff; /* 0xff will make it into DATA section... */
+unsigned char boot_cpu_id4; /* boot_cpu_id << 2 */
+
 static void
 prom_console_write(struct console *con, const char *s, unsigned n)
 {
 	prom_write(s, n);
 }
 
-static struct console prom_debug_console = {
-	.name =		"debug",
+static struct console prom_early_console = {
+	.name =		"earlyprom",
 	.write =	prom_console_write,
-	.flags =	CON_PRINTBUFFER,
+	.flags =	CON_PRINTBUFFER | CON_BOOT,
 	.index =	-1,
 };
 
@@ -133,8 +137,7 @@
 		prom_halt();
 		break;
 	case 'p':
-		/* Use PROM debug console. */
-		register_console(&prom_debug_console);
+		/* Just ignore, this behavior is now the default.  */
 		break;
 	default:
 		printk("Unknown boot switch (-%c)\n", c);
@@ -215,6 +218,10 @@
 	strcpy(boot_command_line, *cmdline_p);
 	parse_early_param();
 
+	boot_flags_init(*cmdline_p);
+
+	register_console(&prom_early_console);
+
 	/* Set sparc_cpu_model */
 	sparc_cpu_model = sun_unknown;
 	if (!strcmp(&cputypval[0], "sun4 "))
@@ -265,7 +272,6 @@
 #ifdef CONFIG_DUMMY_CONSOLE
 	conswitchp = &dummy_con;
 #endif
-	boot_flags_init(*cmdline_p);
 
 	idprom_init();
 	if (ARCH_SUN4C)
@@ -311,75 +317,6 @@
 	smp_setup_cpu_possible_map();
 }
 
-static int ncpus_probed;
-
-static int show_cpuinfo(struct seq_file *m, void *__unused)
-{
-	seq_printf(m,
-		   "cpu\t\t: %s\n"
-		   "fpu\t\t: %s\n"
-		   "promlib\t\t: Version %d Revision %d\n"
-		   "prom\t\t: %d.%d\n"
-		   "type\t\t: %s\n"
-		   "ncpus probed\t: %d\n"
-		   "ncpus active\t: %d\n"
-#ifndef CONFIG_SMP
-		   "CPU0Bogo\t: %lu.%02lu\n"
-		   "CPU0ClkTck\t: %ld\n"
-#endif
-		   ,
-		   sparc_cpu_type,
-		   sparc_fpu_type ,
-		   romvec->pv_romvers,
-		   prom_rev,
-		   romvec->pv_printrev >> 16,
-		   romvec->pv_printrev & 0xffff,
-		   &cputypval[0],
-		   ncpus_probed,
-		   num_online_cpus()
-#ifndef CONFIG_SMP
-		   , cpu_data(0).udelay_val/(500000/HZ),
-		   (cpu_data(0).udelay_val/(5000/HZ)) % 100,
-		   cpu_data(0).clock_tick
-#endif
-		);
-
-#ifdef CONFIG_SMP
-	smp_bogo(m);
-#endif
-	mmu_info(m);
-#ifdef CONFIG_SMP
-	smp_info(m);
-#endif
-	return 0;
-}
-
-static void *c_start(struct seq_file *m, loff_t *pos)
-{
-	/* The pointer we are returning is arbitrary,
-	 * it just has to be non-NULL and not IS_ERR
-	 * in the success case.
-	 */
-	return *pos == 0 ? &c_start : NULL;
-}
-
-static void *c_next(struct seq_file *m, void *v, loff_t *pos)
-{
-	++*pos;
-	return c_start(m, pos);
-}
-
-static void c_stop(struct seq_file *m, void *v)
-{
-}
-
-const struct seq_operations cpuinfo_op = {
-	.start =c_start,
-	.next =	c_next,
-	.stop =	c_stop,
-	.show =	show_cpuinfo,
-};
-
 extern int stop_a_enabled;
 
 void sun_do_break(void)
diff --git a/arch/sparc/kernel/setup_64.c b/arch/sparc/kernel/setup_64.c
index 29bafe0..f3b6850 100644
--- a/arch/sparc/kernel/setup_64.c
+++ b/arch/sparc/kernel/setup_64.c
@@ -339,84 +339,6 @@
 	paging_init();
 }
 
-/* BUFFER is PAGE_SIZE bytes long. */
-
-extern void smp_info(struct seq_file *);
-extern void smp_bogo(struct seq_file *);
-extern void mmu_info(struct seq_file *);
-
-unsigned int dcache_parity_tl1_occurred;
-unsigned int icache_parity_tl1_occurred;
-
-int ncpus_probed;
-
-static int show_cpuinfo(struct seq_file *m, void *__unused)
-{
-	seq_printf(m, 
-		   "cpu\t\t: %s\n"
-		   "fpu\t\t: %s\n"
-		   "pmu\t\t: %s\n"
-		   "prom\t\t: %s\n"
-		   "type\t\t: %s\n"
-		   "ncpus probed\t: %d\n"
-		   "ncpus active\t: %d\n"
-		   "D$ parity tl1\t: %u\n"
-		   "I$ parity tl1\t: %u\n"
-#ifndef CONFIG_SMP
-		   "Cpu0ClkTck\t: %016lx\n"
-#endif
-		   ,
-		   sparc_cpu_type,
-		   sparc_fpu_type,
-		   sparc_pmu_type,
-		   prom_version,
-		   ((tlb_type == hypervisor) ?
-		    "sun4v" :
-		    "sun4u"),
-		   ncpus_probed,
-		   num_online_cpus(),
-		   dcache_parity_tl1_occurred,
-		   icache_parity_tl1_occurred
-#ifndef CONFIG_SMP
-		   , cpu_data(0).clock_tick
-#endif
-		);
-#ifdef CONFIG_SMP
-	smp_bogo(m);
-#endif
-	mmu_info(m);
-#ifdef CONFIG_SMP
-	smp_info(m);
-#endif
-	return 0;
-}
-
-static void *c_start(struct seq_file *m, loff_t *pos)
-{
-	/* The pointer we are returning is arbitrary,
-	 * it just has to be non-NULL and not IS_ERR
-	 * in the success case.
-	 */
-	return *pos == 0 ? &c_start : NULL;
-}
-
-static void *c_next(struct seq_file *m, void *v, loff_t *pos)
-{
-	++*pos;
-	return c_start(m, pos);
-}
-
-static void c_stop(struct seq_file *m, void *v)
-{
-}
-
-const struct seq_operations cpuinfo_op = {
-	.start =c_start,
-	.next =	c_next,
-	.stop =	c_stop,
-	.show =	show_cpuinfo,
-};
-
 extern int stop_a_enabled;
 
 void sun_do_break(void)
diff --git a/arch/sparc/kernel/smp_32.c b/arch/sparc/kernel/smp_32.c
index 442286d..d5b3958 100644
--- a/arch/sparc/kernel/smp_32.c
+++ b/arch/sparc/kernel/smp_32.c
@@ -37,8 +37,6 @@
 #include "irq.h"
 
 volatile unsigned long cpu_callin_map[NR_CPUS] __cpuinitdata = {0,};
-unsigned char boot_cpu_id = 0;
-unsigned char boot_cpu_id4 = 0; /* boot_cpu_id << 2 */
 
 cpumask_t smp_commenced_mask = CPU_MASK_NONE;
 
@@ -130,14 +128,57 @@
 void smp_send_reschedule(int cpu)
 {
 	/*
-	 * XXX missing reschedule IPI, see scheduler_ipi()
+	 * CPU model dependent way of implementing IPI generation targeting
+	 * a single CPU. The trap handler needs only to do trap entry/return
+	 * to call schedule.
 	 */
+	BTFIXUP_CALL(smp_ipi_resched)(cpu);
 }
 
 void smp_send_stop(void)
 {
 }
 
+void arch_send_call_function_single_ipi(int cpu)
+{
+	/* trigger one IPI single call on one CPU */
+	BTFIXUP_CALL(smp_ipi_single)(cpu);
+}
+
+void arch_send_call_function_ipi_mask(const struct cpumask *mask)
+{
+	int cpu;
+
+	/* trigger IPI mask call on each CPU */
+	for_each_cpu(cpu, mask)
+		BTFIXUP_CALL(smp_ipi_mask_one)(cpu);
+}
+
+void smp_resched_interrupt(void)
+{
+	irq_enter();
+	scheduler_ipi();
+	local_cpu_data().irq_resched_count++;
+	irq_exit();
+	/* re-schedule routine called by interrupt return code. */
+}
+
+void smp_call_function_single_interrupt(void)
+{
+	irq_enter();
+	generic_smp_call_function_single_interrupt();
+	local_cpu_data().irq_call_count++;
+	irq_exit();
+}
+
+void smp_call_function_interrupt(void)
+{
+	irq_enter();
+	generic_smp_call_function_interrupt();
+	local_cpu_data().irq_call_count++;
+	irq_exit();
+}
+
 void smp_flush_cache_all(void)
 {
 	xc0((smpfunc_t) BTFIXUP_CALL(local_flush_cache_all));
@@ -153,9 +194,10 @@
 void smp_flush_cache_mm(struct mm_struct *mm)
 {
 	if(mm->context != NO_CONTEXT) {
-		cpumask_t cpu_mask = *mm_cpumask(mm);
-		cpu_clear(smp_processor_id(), cpu_mask);
-		if (!cpus_empty(cpu_mask))
+		cpumask_t cpu_mask;
+		cpumask_copy(&cpu_mask, mm_cpumask(mm));
+		cpumask_clear_cpu(smp_processor_id(), &cpu_mask);
+		if (!cpumask_empty(&cpu_mask))
 			xc1((smpfunc_t) BTFIXUP_CALL(local_flush_cache_mm), (unsigned long) mm);
 		local_flush_cache_mm(mm);
 	}
@@ -164,9 +206,10 @@
 void smp_flush_tlb_mm(struct mm_struct *mm)
 {
 	if(mm->context != NO_CONTEXT) {
-		cpumask_t cpu_mask = *mm_cpumask(mm);
-		cpu_clear(smp_processor_id(), cpu_mask);
-		if (!cpus_empty(cpu_mask)) {
+		cpumask_t cpu_mask;
+		cpumask_copy(&cpu_mask, mm_cpumask(mm));
+		cpumask_clear_cpu(smp_processor_id(), &cpu_mask);
+		if (!cpumask_empty(&cpu_mask)) {
 			xc1((smpfunc_t) BTFIXUP_CALL(local_flush_tlb_mm), (unsigned long) mm);
 			if(atomic_read(&mm->mm_users) == 1 && current->active_mm == mm)
 				cpumask_copy(mm_cpumask(mm),
@@ -182,9 +225,10 @@
 	struct mm_struct *mm = vma->vm_mm;
 
 	if (mm->context != NO_CONTEXT) {
-		cpumask_t cpu_mask = *mm_cpumask(mm);
-		cpu_clear(smp_processor_id(), cpu_mask);
-		if (!cpus_empty(cpu_mask))
+		cpumask_t cpu_mask;
+		cpumask_copy(&cpu_mask, mm_cpumask(mm));
+		cpumask_clear_cpu(smp_processor_id(), &cpu_mask);
+		if (!cpumask_empty(&cpu_mask))
 			xc3((smpfunc_t) BTFIXUP_CALL(local_flush_cache_range), (unsigned long) vma, start, end);
 		local_flush_cache_range(vma, start, end);
 	}
@@ -196,9 +240,10 @@
 	struct mm_struct *mm = vma->vm_mm;
 
 	if (mm->context != NO_CONTEXT) {
-		cpumask_t cpu_mask = *mm_cpumask(mm);
-		cpu_clear(smp_processor_id(), cpu_mask);
-		if (!cpus_empty(cpu_mask))
+		cpumask_t cpu_mask;
+		cpumask_copy(&cpu_mask, mm_cpumask(mm));
+		cpumask_clear_cpu(smp_processor_id(), &cpu_mask);
+		if (!cpumask_empty(&cpu_mask))
 			xc3((smpfunc_t) BTFIXUP_CALL(local_flush_tlb_range), (unsigned long) vma, start, end);
 		local_flush_tlb_range(vma, start, end);
 	}
@@ -209,9 +254,10 @@
 	struct mm_struct *mm = vma->vm_mm;
 
 	if(mm->context != NO_CONTEXT) {
-		cpumask_t cpu_mask = *mm_cpumask(mm);
-		cpu_clear(smp_processor_id(), cpu_mask);
-		if (!cpus_empty(cpu_mask))
+		cpumask_t cpu_mask;
+		cpumask_copy(&cpu_mask, mm_cpumask(mm));
+		cpumask_clear_cpu(smp_processor_id(), &cpu_mask);
+		if (!cpumask_empty(&cpu_mask))
 			xc2((smpfunc_t) BTFIXUP_CALL(local_flush_cache_page), (unsigned long) vma, page);
 		local_flush_cache_page(vma, page);
 	}
@@ -222,19 +268,15 @@
 	struct mm_struct *mm = vma->vm_mm;
 
 	if(mm->context != NO_CONTEXT) {
-		cpumask_t cpu_mask = *mm_cpumask(mm);
-		cpu_clear(smp_processor_id(), cpu_mask);
-		if (!cpus_empty(cpu_mask))
+		cpumask_t cpu_mask;
+		cpumask_copy(&cpu_mask, mm_cpumask(mm));
+		cpumask_clear_cpu(smp_processor_id(), &cpu_mask);
+		if (!cpumask_empty(&cpu_mask))
 			xc2((smpfunc_t) BTFIXUP_CALL(local_flush_tlb_page), (unsigned long) vma, page);
 		local_flush_tlb_page(vma, page);
 	}
 }
 
-void smp_reschedule_irq(void)
-{
-	set_need_resched();
-}
-
 void smp_flush_page_to_ram(unsigned long page)
 {
 	/* Current theory is that those who call this are the one's
@@ -251,9 +293,10 @@
 
 void smp_flush_sig_insns(struct mm_struct *mm, unsigned long insn_addr)
 {
-	cpumask_t cpu_mask = *mm_cpumask(mm);
-	cpu_clear(smp_processor_id(), cpu_mask);
-	if (!cpus_empty(cpu_mask))
+	cpumask_t cpu_mask;
+	cpumask_copy(&cpu_mask, mm_cpumask(mm));
+	cpumask_clear_cpu(smp_processor_id(), &cpu_mask);
+	if (!cpumask_empty(&cpu_mask))
 		xc2((smpfunc_t) BTFIXUP_CALL(local_flush_sig_insns), (unsigned long) mm, insn_addr);
 	local_flush_sig_insns(mm, insn_addr);
 }
@@ -407,7 +450,7 @@
 	};
 
 	if (!ret) {
-		cpu_set(cpu, smp_commenced_mask);
+		cpumask_set_cpu(cpu, &smp_commenced_mask);
 		while (!cpu_online(cpu))
 			mb();
 	}
diff --git a/arch/sparc/kernel/smp_64.c b/arch/sparc/kernel/smp_64.c
index 9478da7..99cb172 100644
--- a/arch/sparc/kernel/smp_64.c
+++ b/arch/sparc/kernel/smp_64.c
@@ -121,11 +121,11 @@
 	/* inform the notifiers about the new cpu */
 	notify_cpu_starting(cpuid);
 
-	while (!cpu_isset(cpuid, smp_commenced_mask))
+	while (!cpumask_test_cpu(cpuid, &smp_commenced_mask))
 		rmb();
 
 	ipi_call_lock_irq();
-	cpu_set(cpuid, cpu_online_map);
+	set_cpu_online(cpuid, true);
 	ipi_call_unlock_irq();
 
 	/* idle thread is expected to have preempt disabled */
@@ -785,7 +785,7 @@
 
 /* Send cross call to all processors mentioned in MASK_P
  * except self.  Really, there are only two cases currently,
- * "&cpu_online_map" and "&mm->cpu_vm_mask".
+ * "cpu_online_mask" and "mm_cpumask(mm)".
  */
 static void smp_cross_call_masked(unsigned long *func, u32 ctx, u64 data1, u64 data2, const cpumask_t *mask)
 {
@@ -797,7 +797,7 @@
 /* Send cross call to all processors except self. */
 static void smp_cross_call(unsigned long *func, u32 ctx, u64 data1, u64 data2)
 {
-	smp_cross_call_masked(func, ctx, data1, data2, &cpu_online_map);
+	smp_cross_call_masked(func, ctx, data1, data2, cpu_online_mask);
 }
 
 extern unsigned long xcall_sync_tick;
@@ -805,7 +805,7 @@
 static void smp_start_sync_tick_client(int cpu)
 {
 	xcall_deliver((u64) &xcall_sync_tick, 0, 0,
-		      &cpumask_of_cpu(cpu));
+		      cpumask_of(cpu));
 }
 
 extern unsigned long xcall_call_function;
@@ -820,7 +820,7 @@
 void arch_send_call_function_single_ipi(int cpu)
 {
 	xcall_deliver((u64) &xcall_call_function_single, 0, 0,
-		      &cpumask_of_cpu(cpu));
+		      cpumask_of(cpu));
 }
 
 void __irq_entry smp_call_function_client(int irq, struct pt_regs *regs)
@@ -918,7 +918,7 @@
 		}
 		if (data0) {
 			xcall_deliver(data0, __pa(pg_addr),
-				      (u64) pg_addr, &cpumask_of_cpu(cpu));
+				      (u64) pg_addr, cpumask_of(cpu));
 #ifdef CONFIG_DEBUG_DCFLUSH
 			atomic_inc(&dcpage_flushes_xcall);
 #endif
@@ -954,7 +954,7 @@
 	}
 	if (data0) {
 		xcall_deliver(data0, __pa(pg_addr),
-			      (u64) pg_addr, &cpu_online_map);
+			      (u64) pg_addr, cpu_online_mask);
 #ifdef CONFIG_DEBUG_DCFLUSH
 		atomic_inc(&dcpage_flushes_xcall);
 #endif
@@ -1197,32 +1197,32 @@
 	for_each_present_cpu(i) {
 		unsigned int j;
 
-		cpus_clear(cpu_core_map[i]);
+		cpumask_clear(&cpu_core_map[i]);
 		if (cpu_data(i).core_id == 0) {
-			cpu_set(i, cpu_core_map[i]);
+			cpumask_set_cpu(i, &cpu_core_map[i]);
 			continue;
 		}
 
 		for_each_present_cpu(j) {
 			if (cpu_data(i).core_id ==
 			    cpu_data(j).core_id)
-				cpu_set(j, cpu_core_map[i]);
+				cpumask_set_cpu(j, &cpu_core_map[i]);
 		}
 	}
 
 	for_each_present_cpu(i) {
 		unsigned int j;
 
-		cpus_clear(per_cpu(cpu_sibling_map, i));
+		cpumask_clear(&per_cpu(cpu_sibling_map, i));
 		if (cpu_data(i).proc_id == -1) {
-			cpu_set(i, per_cpu(cpu_sibling_map, i));
+			cpumask_set_cpu(i, &per_cpu(cpu_sibling_map, i));
 			continue;
 		}
 
 		for_each_present_cpu(j) {
 			if (cpu_data(i).proc_id ==
 			    cpu_data(j).proc_id)
-				cpu_set(j, per_cpu(cpu_sibling_map, i));
+				cpumask_set_cpu(j, &per_cpu(cpu_sibling_map, i));
 		}
 	}
 }
@@ -1232,10 +1232,10 @@
 	int ret = smp_boot_one_cpu(cpu);
 
 	if (!ret) {
-		cpu_set(cpu, smp_commenced_mask);
-		while (!cpu_isset(cpu, cpu_online_map))
+		cpumask_set_cpu(cpu, &smp_commenced_mask);
+		while (!cpu_online(cpu))
 			mb();
-		if (!cpu_isset(cpu, cpu_online_map)) {
+		if (!cpu_online(cpu)) {
 			ret = -ENODEV;
 		} else {
 			/* On SUN4V, writes to %tick and %stick are
@@ -1269,7 +1269,7 @@
 				tb->nonresum_mondo_pa, 0);
 	}
 
-	cpu_clear(cpu, smp_commenced_mask);
+	cpumask_clear_cpu(cpu, &smp_commenced_mask);
 	membar_safe("#Sync");
 
 	local_irq_disable();
@@ -1290,13 +1290,13 @@
 	cpuinfo_sparc *c;
 	int i;
 
-	for_each_cpu_mask(i, cpu_core_map[cpu])
-		cpu_clear(cpu, cpu_core_map[i]);
-	cpus_clear(cpu_core_map[cpu]);
+	for_each_cpu(i, &cpu_core_map[cpu])
+		cpumask_clear_cpu(cpu, &cpu_core_map[i]);
+	cpumask_clear(&cpu_core_map[cpu]);
 
-	for_each_cpu_mask(i, per_cpu(cpu_sibling_map, cpu))
-		cpu_clear(cpu, per_cpu(cpu_sibling_map, i));
-	cpus_clear(per_cpu(cpu_sibling_map, cpu));
+	for_each_cpu(i, &per_cpu(cpu_sibling_map, cpu))
+		cpumask_clear_cpu(cpu, &per_cpu(cpu_sibling_map, i));
+	cpumask_clear(&per_cpu(cpu_sibling_map, cpu));
 
 	c = &cpu_data(cpu);
 
@@ -1313,7 +1313,7 @@
 	local_irq_disable();
 
 	ipi_call_lock();
-	cpu_clear(cpu, cpu_online_map);
+	set_cpu_online(cpu, false);
 	ipi_call_unlock();
 
 	cpu_map_rebuild();
@@ -1327,11 +1327,11 @@
 
 	for (i = 0; i < 100; i++) {
 		smp_rmb();
-		if (!cpu_isset(cpu, smp_commenced_mask))
+		if (!cpumask_test_cpu(cpu, &smp_commenced_mask))
 			break;
 		msleep(100);
 	}
-	if (cpu_isset(cpu, smp_commenced_mask)) {
+	if (cpumask_test_cpu(cpu, &smp_commenced_mask)) {
 		printk(KERN_ERR "CPU %u didn't die...\n", cpu);
 	} else {
 #if defined(CONFIG_SUN_LDOMS)
@@ -1341,7 +1341,7 @@
 		do {
 			hv_err = sun4v_cpu_stop(cpu);
 			if (hv_err == HV_EOK) {
-				cpu_clear(cpu, cpu_present_map);
+				set_cpu_present(cpu, false);
 				break;
 			}
 		} while (--limit > 0);
@@ -1362,7 +1362,7 @@
 void smp_send_reschedule(int cpu)
 {
 	xcall_deliver((u64) &xcall_receive_signal, 0, 0,
-		      &cpumask_of_cpu(cpu));
+		      cpumask_of(cpu));
 }
 
 void __irq_entry smp_receive_signal_client(int irq, struct pt_regs *regs)
diff --git a/arch/sparc/kernel/sun4c_irq.c b/arch/sparc/kernel/sun4c_irq.c
index 90eea38..f6bf25a 100644
--- a/arch/sparc/kernel/sun4c_irq.c
+++ b/arch/sparc/kernel/sun4c_irq.c
@@ -65,62 +65,94 @@
  */
 unsigned char __iomem *interrupt_enable;
 
-static void sun4c_disable_irq(unsigned int irq_nr)
+static void sun4c_mask_irq(struct irq_data *data)
 {
-	unsigned long flags;
-	unsigned char current_mask, new_mask;
+	unsigned long mask = (unsigned long)data->chip_data;
 
-	local_irq_save(flags);
-	irq_nr &= (NR_IRQS - 1);
-	current_mask = sbus_readb(interrupt_enable);
-	switch (irq_nr) {
-	case 1:
-		new_mask = ((current_mask) & (~(SUN4C_INT_E1)));
-		break;
-	case 8:
-		new_mask = ((current_mask) & (~(SUN4C_INT_E8)));
-		break;
-	case 10:
-		new_mask = ((current_mask) & (~(SUN4C_INT_E10)));
-		break;
-	case 14:
-		new_mask = ((current_mask) & (~(SUN4C_INT_E14)));
-		break;
-	default:
+	if (mask) {
+		unsigned long flags;
+
+		local_irq_save(flags);
+		mask = sbus_readb(interrupt_enable) & ~mask;
+		sbus_writeb(mask, interrupt_enable);
 		local_irq_restore(flags);
-		return;
 	}
-	sbus_writeb(new_mask, interrupt_enable);
-	local_irq_restore(flags);
 }
 
-static void sun4c_enable_irq(unsigned int irq_nr)
+static void sun4c_unmask_irq(struct irq_data *data)
 {
-	unsigned long flags;
-	unsigned char current_mask, new_mask;
+	unsigned long mask = (unsigned long)data->chip_data;
 
-	local_irq_save(flags);
-	irq_nr &= (NR_IRQS - 1);
-	current_mask = sbus_readb(interrupt_enable);
-	switch (irq_nr) {
-	case 1:
-		new_mask = ((current_mask) | SUN4C_INT_E1);
-		break;
-	case 8:
-		new_mask = ((current_mask) | SUN4C_INT_E8);
-		break;
-	case 10:
-		new_mask = ((current_mask) | SUN4C_INT_E10);
-		break;
-	case 14:
-		new_mask = ((current_mask) | SUN4C_INT_E14);
-		break;
-	default:
+	if (mask) {
+		unsigned long flags;
+
+		local_irq_save(flags);
+		mask = sbus_readb(interrupt_enable) | mask;
+		sbus_writeb(mask, interrupt_enable);
 		local_irq_restore(flags);
-		return;
 	}
-	sbus_writeb(new_mask, interrupt_enable);
-	local_irq_restore(flags);
+}
+
+static unsigned int sun4c_startup_irq(struct irq_data *data)
+{
+	irq_link(data->irq);
+	sun4c_unmask_irq(data);
+
+	return 0;
+}
+
+static void sun4c_shutdown_irq(struct irq_data *data)
+{
+	sun4c_mask_irq(data);
+	irq_unlink(data->irq);
+}
+
+static struct irq_chip sun4c_irq = {
+	.name		= "sun4c",
+	.irq_startup	= sun4c_startup_irq,
+	.irq_shutdown	= sun4c_shutdown_irq,
+	.irq_mask	= sun4c_mask_irq,
+	.irq_unmask	= sun4c_unmask_irq,
+};
+
+static unsigned int sun4c_build_device_irq(struct platform_device *op,
+					   unsigned int real_irq)
+{
+	 unsigned int irq;
+
+	if (real_irq >= 16) {
+		prom_printf("Bogus sun4c IRQ %u\n", real_irq);
+		prom_halt();
+	}
+
+	irq = irq_alloc(real_irq, real_irq);
+	if (irq) {
+		unsigned long mask = 0UL;
+
+		switch (real_irq) {
+		case 1:
+			mask = SUN4C_INT_E1;
+			break;
+		case 8:
+			mask = SUN4C_INT_E8;
+			break;
+		case 10:
+			mask = SUN4C_INT_E10;
+			break;
+		case 14:
+			mask = SUN4C_INT_E14;
+			break;
+		default:
+			/* All the rest are either always enabled,
+			 * or are for signalling software interrupts.
+			 */
+			break;
+		}
+		irq_set_chip_and_handler_name(irq, &sun4c_irq,
+		                              handle_level_irq, "level");
+		irq_set_chip_data(irq, (void *)mask);
+	}
+	return irq;
 }
 
 struct sun4c_timer_info {
@@ -144,8 +176,9 @@
 
 static void __init sun4c_init_timers(irq_handler_t counter_fn)
 {
-	const struct linux_prom_irqs *irq;
+	const struct linux_prom_irqs *prom_irqs;
 	struct device_node *dp;
+	unsigned int irq;
 	const u32 *addr;
 	int err;
 
@@ -163,9 +196,9 @@
 
 	sun4c_timers = (void __iomem *) (unsigned long) addr[0];
 
-	irq = of_get_property(dp, "intr", NULL);
+	prom_irqs = of_get_property(dp, "intr", NULL);
 	of_node_put(dp);
-	if (!irq) {
+	if (!prom_irqs) {
 		prom_printf("sun4c_init_timers: No intr property\n");
 		prom_halt();
 	}
@@ -178,15 +211,15 @@
 
 	master_l10_counter = &sun4c_timers->l10_count;
 
-	err = request_irq(irq[0].pri, counter_fn,
-			  (IRQF_DISABLED | SA_STATIC_ALLOC),
-			  "timer", NULL);
+	irq = sun4c_build_device_irq(NULL, prom_irqs[0].pri);
+	err = request_irq(irq, counter_fn, IRQF_TIMER, "timer", NULL);
 	if (err) {
 		prom_printf("sun4c_init_timers: request_irq() fails with %d\n", err);
 		prom_halt();
 	}
 
-	sun4c_disable_irq(irq[1].pri);
+	/* disable timer interrupt */
+	sun4c_mask_irq(irq_get_irq_data(irq));
 }
 
 #ifdef CONFIG_SMP
@@ -215,14 +248,11 @@
 
 	interrupt_enable = (void __iomem *) (unsigned long) addr[0];
 
-	BTFIXUPSET_CALL(enable_irq, sun4c_enable_irq, BTFIXUPCALL_NORM);
-	BTFIXUPSET_CALL(disable_irq, sun4c_disable_irq, BTFIXUPCALL_NORM);
-	BTFIXUPSET_CALL(enable_pil_irq, sun4c_enable_irq, BTFIXUPCALL_NORM);
-	BTFIXUPSET_CALL(disable_pil_irq, sun4c_disable_irq, BTFIXUPCALL_NORM);
 	BTFIXUPSET_CALL(clear_clock_irq, sun4c_clear_clock_irq, BTFIXUPCALL_NORM);
 	BTFIXUPSET_CALL(load_profile_irq, sun4c_load_profile_irq, BTFIXUPCALL_NOP);
 
-	sparc_irq_config.init_timers = sun4c_init_timers;
+	sparc_irq_config.init_timers      = sun4c_init_timers;
+	sparc_irq_config.build_device_irq = sun4c_build_device_irq;
 
 #ifdef CONFIG_SMP
 	BTFIXUPSET_CALL(set_cpu_int, sun4c_nop, BTFIXUPCALL_NOP);
diff --git a/arch/sparc/kernel/sun4d_irq.c b/arch/sparc/kernel/sun4d_irq.c
index 77b4a89..a9ea60e 100644
--- a/arch/sparc/kernel/sun4d_irq.c
+++ b/arch/sparc/kernel/sun4d_irq.c
@@ -14,6 +14,7 @@
 #include <asm/io.h>
 #include <asm/sbi.h>
 #include <asm/cacheflush.h>
+#include <asm/setup.h>
 
 #include "kernel.h"
 #include "irq.h"
@@ -22,22 +23,20 @@
  * cpu local.  CPU local interrupts cover the timer interrupts
  * and whatnot, and we encode those as normal PILs between
  * 0 and 15.
- *
- * SBUS interrupts are encoded integers including the board number
- * (plus one), the SBUS level, and the SBUS slot number.  Sun4D
- * IRQ dispatch is done by:
- *
- * 1) Reading the BW local interrupt table in order to get the bus
- *    interrupt mask.
- *
- *    This table is indexed by SBUS interrupt level which can be
- *    derived from the PIL we got interrupted on.
- *
- * 2) For each bus showing interrupt pending from #1, read the
- *    SBI interrupt state register.  This will indicate which slots
- *    have interrupts pending for that SBUS interrupt level.
+ * SBUS interrupts are encodes as a combination of board, level and slot.
  */
 
+struct sun4d_handler_data {
+	unsigned int cpuid;    /* target cpu */
+	unsigned int real_irq; /* interrupt level */
+};
+
+
+static unsigned int sun4d_encode_irq(int board, int lvl, int slot)
+{
+	return (board + 1) << 5 | (lvl << 2) | slot;
+}
+
 struct sun4d_timer_regs {
 	u32	l10_timer_limit;
 	u32	l10_cur_countx;
@@ -48,17 +47,12 @@
 
 static struct sun4d_timer_regs __iomem *sun4d_timers;
 
-#define TIMER_IRQ	10
+#define SUN4D_TIMER_IRQ        10
 
-#define MAX_STATIC_ALLOC	4
-static unsigned char sbus_tid[32];
-
-static struct irqaction *irq_action[NR_IRQS];
-
-static struct sbus_action {
-	struct irqaction *action;
-	/* For SMP this needs to be extended */
-} *sbus_actions;
+/* Specify which cpu handle interrupts from which board.
+ * Index is board - value is cpu.
+ */
+static unsigned char board_to_cpu[32];
 
 static int pil_to_sbus[] = {
 	0,
@@ -79,152 +73,81 @@
 	0,
 };
 
-static int sbus_to_pil[] = {
-	0,
-	2,
-	3,
-	5,
-	7,
-	9,
-	11,
-	13,
-};
-
-static int nsbi;
-
 /* Exported for sun4d_smp.c */
 DEFINE_SPINLOCK(sun4d_imsk_lock);
 
-int show_sun4d_interrupts(struct seq_file *p, void *v)
+/* SBUS interrupts are encoded integers including the board number
+ * (plus one), the SBUS level, and the SBUS slot number.  Sun4D
+ * IRQ dispatch is done by:
+ *
+ * 1) Reading the BW local interrupt table in order to get the bus
+ *    interrupt mask.
+ *
+ *    This table is indexed by SBUS interrupt level which can be
+ *    derived from the PIL we got interrupted on.
+ *
+ * 2) For each bus showing interrupt pending from #1, read the
+ *    SBI interrupt state register.  This will indicate which slots
+ *    have interrupts pending for that SBUS interrupt level.
+ *
+ * 3) Call the genreric IRQ support.
+ */
+static void sun4d_sbus_handler_irq(int sbusl)
 {
-	int i = *(loff_t *) v, j = 0, k = 0, sbusl;
-	struct irqaction *action;
-	unsigned long flags;
-#ifdef CONFIG_SMP
-	int x;
-#endif
+	unsigned int bus_mask;
+	unsigned int sbino, slot;
+	unsigned int sbil;
 
-	spin_lock_irqsave(&irq_action_lock, flags);
-	if (i < NR_IRQS) {
-		sbusl = pil_to_sbus[i];
-		if (!sbusl) {
-			action = *(i + irq_action);
-			if (!action)
-				goto out_unlock;
-		} else {
-			for (j = 0; j < nsbi; j++) {
-				for (k = 0; k < 4; k++)
-					action = sbus_actions[(j << 5) + (sbusl << 2) + k].action;
-					if (action)
-						goto found_it;
-			}
-			goto out_unlock;
-		}
-found_it:	seq_printf(p, "%3d: ", i);
-#ifndef CONFIG_SMP
-		seq_printf(p, "%10u ", kstat_irqs(i));
-#else
-		for_each_online_cpu(x)
-			seq_printf(p, "%10u ",
-			       kstat_cpu(cpu_logical_map(x)).irqs[i]);
-#endif
-		seq_printf(p, "%c %s",
-			(action->flags & IRQF_DISABLED) ? '+' : ' ',
-			action->name);
-		action = action->next;
-		for (;;) {
-			for (; action; action = action->next) {
-				seq_printf(p, ",%s %s",
-					(action->flags & IRQF_DISABLED) ? " +" : "",
-					action->name);
-			}
-			if (!sbusl)
-				break;
-			k++;
-			if (k < 4) {
-				action = sbus_actions[(j << 5) + (sbusl << 2) + k].action;
-			} else {
-				j++;
-				if (j == nsbi)
-					break;
-				k = 0;
-				action = sbus_actions[(j << 5) + (sbusl << 2)].action;
-			}
-		}
-		seq_putc(p, '\n');
-	}
-out_unlock:
-	spin_unlock_irqrestore(&irq_action_lock, flags);
-	return 0;
-}
+	bus_mask = bw_get_intr_mask(sbusl) & 0x3ffff;
+	bw_clear_intr_mask(sbusl, bus_mask);
 
-void sun4d_free_irq(unsigned int irq, void *dev_id)
-{
-	struct irqaction *action, **actionp;
-	struct irqaction *tmp = NULL;
-	unsigned long flags;
+	sbil = (sbusl << 2);
+	/* Loop for each pending SBI */
+	for (sbino = 0; bus_mask; sbino++) {
+		unsigned int idx, mask;
 
-	spin_lock_irqsave(&irq_action_lock, flags);
-	if (irq < 15)
-		actionp = irq + irq_action;
-	else
-		actionp = &(sbus_actions[irq - (1 << 5)].action);
-	action = *actionp;
-	if (!action) {
-		printk(KERN_ERR "Trying to free free IRQ%d\n", irq);
-		goto out_unlock;
-	}
-	if (dev_id) {
-		for (; action; action = action->next) {
-			if (action->dev_id == dev_id)
-				break;
-			tmp = action;
-		}
-		if (!action) {
-			printk(KERN_ERR "Trying to free free shared IRQ%d\n",
-			       irq);
-			goto out_unlock;
-		}
-	} else if (action->flags & IRQF_SHARED) {
-		printk(KERN_ERR "Trying to free shared IRQ%d with NULL device ID\n",
-		       irq);
-		goto out_unlock;
-	}
-	if (action->flags & SA_STATIC_ALLOC) {
-		/*
-		 * This interrupt is marked as specially allocated
-		 * so it is a bad idea to free it.
+		bus_mask >>= 1;
+		if (!(bus_mask & 1))
+			continue;
+		/* XXX This seems to ACK the irq twice.  acquire_sbi()
+		 * XXX uses swap, therefore this writes 0xf << sbil,
+		 * XXX then later release_sbi() will write the individual
+		 * XXX bits which were set again.
 		 */
-		printk(KERN_ERR "Attempt to free statically allocated IRQ%d (%s)\n",
-		       irq, action->name);
-		goto out_unlock;
+		mask = acquire_sbi(SBI2DEVID(sbino), 0xf << sbil);
+		mask &= (0xf << sbil);
+
+		/* Loop for each pending SBI slot */
+		idx = 0;
+		slot = (1 << sbil);
+		while (mask != 0) {
+			unsigned int pil;
+			struct irq_bucket *p;
+
+			idx++;
+			slot <<= 1;
+			if (!(mask & slot))
+				continue;
+
+			mask &= ~slot;
+			pil = sun4d_encode_irq(sbino, sbil, idx);
+
+			p = irq_map[pil];
+			while (p) {
+				struct irq_bucket *next;
+
+				next = p->next;
+				generic_handle_irq(p->irq);
+				p = next;
+			}
+			release_sbi(SBI2DEVID(sbino), slot);
+		}
 	}
-
-	if (tmp)
-		tmp->next = action->next;
-	else
-		*actionp = action->next;
-
-	spin_unlock_irqrestore(&irq_action_lock, flags);
-
-	synchronize_irq(irq);
-
-	spin_lock_irqsave(&irq_action_lock, flags);
-
-	kfree(action);
-
-	if (!(*actionp))
-		__disable_irq(irq);
-
-out_unlock:
-	spin_unlock_irqrestore(&irq_action_lock, flags);
 }
 
 void sun4d_handler_irq(int pil, struct pt_regs *regs)
 {
 	struct pt_regs *old_regs;
-	struct irqaction *action;
-	int cpu = smp_processor_id();
 	/* SBUS IRQ level (1 - 7) */
 	int sbusl = pil_to_sbus[pil];
 
@@ -233,160 +156,96 @@
 
 	cc_set_iclr(1 << pil);
 
+#ifdef CONFIG_SMP
+	/*
+	 * Check IPI data structures after IRQ has been cleared. Hard and Soft
+	 * IRQ can happen at the same time, so both cases are always handled.
+	 */
+	if (pil == SUN4D_IPI_IRQ)
+		sun4d_ipi_interrupt();
+#endif
+
 	old_regs = set_irq_regs(regs);
 	irq_enter();
-	kstat_cpu(cpu).irqs[pil]++;
-	if (!sbusl) {
-		action = *(pil + irq_action);
-		if (!action)
-			unexpected_irq(pil, NULL, regs);
-		do {
-			action->handler(pil, action->dev_id);
-			action = action->next;
-		} while (action);
+	if (sbusl == 0) {
+		/* cpu interrupt */
+		struct irq_bucket *p;
+
+		p = irq_map[pil];
+		while (p) {
+			struct irq_bucket *next;
+
+			next = p->next;
+			generic_handle_irq(p->irq);
+			p = next;
+		}
 	} else {
-		int bus_mask = bw_get_intr_mask(sbusl) & 0x3ffff;
-		int sbino;
-		struct sbus_action *actionp;
-		unsigned mask, slot;
-		int sbil = (sbusl << 2);
-
-		bw_clear_intr_mask(sbusl, bus_mask);
-
-		/* Loop for each pending SBI */
-		for (sbino = 0; bus_mask; sbino++, bus_mask >>= 1)
-			if (bus_mask & 1) {
-				mask = acquire_sbi(SBI2DEVID(sbino), 0xf << sbil);
-				mask &= (0xf << sbil);
-				actionp = sbus_actions + (sbino << 5) + (sbil);
-				/* Loop for each pending SBI slot */
-				for (slot = (1 << sbil); mask; slot <<= 1, actionp++)
-					if (mask & slot) {
-						mask &= ~slot;
-						action = actionp->action;
-
-						if (!action)
-							unexpected_irq(pil, NULL, regs);
-						do {
-							action->handler(pil, action->dev_id);
-							action = action->next;
-						} while (action);
-						release_sbi(SBI2DEVID(sbino), slot);
-					}
-			}
+		/* SBUS interrupt */
+		sun4d_sbus_handler_irq(sbusl);
 	}
 	irq_exit();
 	set_irq_regs(old_regs);
 }
 
-int sun4d_request_irq(unsigned int irq,
-		irq_handler_t handler,
-		unsigned long irqflags, const char *devname, void *dev_id)
+
+static void sun4d_mask_irq(struct irq_data *data)
 {
-	struct irqaction *action, *tmp = NULL, **actionp;
+	struct sun4d_handler_data *handler_data = data->handler_data;
+	unsigned int real_irq;
+#ifdef CONFIG_SMP
+	int cpuid = handler_data->cpuid;
 	unsigned long flags;
-	int ret;
-
-	if (irq > 14 && irq < (1 << 5)) {
-		ret = -EINVAL;
-		goto out;
-	}
-
-	if (!handler) {
-		ret = -EINVAL;
-		goto out;
-	}
-
-	spin_lock_irqsave(&irq_action_lock, flags);
-
-	if (irq >= (1 << 5))
-		actionp = &(sbus_actions[irq - (1 << 5)].action);
-	else
-		actionp = irq + irq_action;
-	action = *actionp;
-
-	if (action) {
-		if ((action->flags & IRQF_SHARED) && (irqflags & IRQF_SHARED)) {
-			for (tmp = action; tmp->next; tmp = tmp->next)
-				/* find last entry - tmp used below */;
-		} else {
-			ret = -EBUSY;
-			goto out_unlock;
-		}
-		if ((action->flags & IRQF_DISABLED) ^ (irqflags & IRQF_DISABLED)) {
-			printk(KERN_ERR "Attempt to mix fast and slow interrupts on IRQ%d denied\n",
-			       irq);
-			ret = -EBUSY;
-			goto out_unlock;
-		}
-		action = NULL;		/* Or else! */
-	}
-
-	/* If this is flagged as statically allocated then we use our
-	 * private struct which is never freed.
-	 */
-	if (irqflags & SA_STATIC_ALLOC) {
-		if (static_irq_count < MAX_STATIC_ALLOC)
-			action = &static_irqaction[static_irq_count++];
-		else
-			printk(KERN_ERR "Request for IRQ%d (%s) SA_STATIC_ALLOC failed using kmalloc\n",
-			       irq, devname);
-	}
-
-	if (action == NULL)
-		action = kmalloc(sizeof(struct irqaction), GFP_ATOMIC);
-
-	if (!action) {
-		ret = -ENOMEM;
-		goto out_unlock;
-	}
-
-	action->handler = handler;
-	action->flags = irqflags;
-	action->name = devname;
-	action->next = NULL;
-	action->dev_id = dev_id;
-
-	if (tmp)
-		tmp->next = action;
-	else
-		*actionp = action;
-
-	__enable_irq(irq);
-
-	ret = 0;
-out_unlock:
-	spin_unlock_irqrestore(&irq_action_lock, flags);
-out:
-	return ret;
-}
-
-static void sun4d_disable_irq(unsigned int irq)
-{
-	int tid = sbus_tid[(irq >> 5) - 1];
-	unsigned long flags;
-
-	if (irq < NR_IRQS)
-		return;
-
+#endif
+	real_irq = handler_data->real_irq;
+#ifdef CONFIG_SMP
 	spin_lock_irqsave(&sun4d_imsk_lock, flags);
-	cc_set_imsk_other(tid, cc_get_imsk_other(tid) | (1 << sbus_to_pil[(irq >> 2) & 7]));
+	cc_set_imsk_other(cpuid, cc_get_imsk_other(cpuid) | (1 << real_irq));
 	spin_unlock_irqrestore(&sun4d_imsk_lock, flags);
+#else
+	cc_set_imsk(cc_get_imsk() | (1 << real_irq));
+#endif
 }
 
-static void sun4d_enable_irq(unsigned int irq)
+static void sun4d_unmask_irq(struct irq_data *data)
 {
-	int tid = sbus_tid[(irq >> 5) - 1];
+	struct sun4d_handler_data *handler_data = data->handler_data;
+	unsigned int real_irq;
+#ifdef CONFIG_SMP
+	int cpuid = handler_data->cpuid;
 	unsigned long flags;
+#endif
+	real_irq = handler_data->real_irq;
 
-	if (irq < NR_IRQS)
-		return;
-
+#ifdef CONFIG_SMP
 	spin_lock_irqsave(&sun4d_imsk_lock, flags);
-	cc_set_imsk_other(tid, cc_get_imsk_other(tid) & ~(1 << sbus_to_pil[(irq >> 2) & 7]));
+	cc_set_imsk_other(cpuid, cc_get_imsk_other(cpuid) | ~(1 << real_irq));
 	spin_unlock_irqrestore(&sun4d_imsk_lock, flags);
+#else
+	cc_set_imsk(cc_get_imsk() | ~(1 << real_irq));
+#endif
 }
 
+static unsigned int sun4d_startup_irq(struct irq_data *data)
+{
+	irq_link(data->irq);
+	sun4d_unmask_irq(data);
+	return 0;
+}
+
+static void sun4d_shutdown_irq(struct irq_data *data)
+{
+	sun4d_mask_irq(data);
+	irq_unlink(data->irq);
+}
+
+struct irq_chip sun4d_irq = {
+	.name		= "sun4d",
+	.irq_startup	= sun4d_startup_irq,
+	.irq_shutdown	= sun4d_shutdown_irq,
+	.irq_unmask	= sun4d_unmask_irq,
+	.irq_mask	= sun4d_mask_irq,
+};
+
 #ifdef CONFIG_SMP
 static void sun4d_set_cpu_int(int cpu, int level)
 {
@@ -413,7 +272,7 @@
 	for_each_node_by_name(dp, "sbi") {
 		int devid = of_getintprop_default(dp, "device-id", 0);
 		int board = of_getintprop_default(dp, "board#", 0);
-		sbus_tid[board] = cpuid;
+		board_to_cpu[board] = cpuid;
 		set_sbi_tid(devid, cpuid << 3);
 	}
 	printk(KERN_ERR "All sbus IRQs directed to CPU%d\n", cpuid);
@@ -443,15 +302,16 @@
 unsigned int sun4d_build_device_irq(struct platform_device *op,
                                     unsigned int real_irq)
 {
-	static int pil_to_sbus[] = {
-		0, 0, 1, 2, 0, 3, 0, 4, 0, 5, 0, 6, 0, 7, 0, 0,
-	};
 	struct device_node *dp = op->dev.of_node;
 	struct device_node *io_unit, *sbi = dp->parent;
 	const struct linux_prom_registers *regs;
+	struct sun4d_handler_data *handler_data;
+	unsigned int pil;
+	unsigned int irq;
 	int board, slot;
 	int sbusl;
 
+	irq = 0;
 	while (sbi) {
 		if (!strcmp(sbi->name, "sbi"))
 			break;
@@ -484,7 +344,28 @@
 
 	sbusl = pil_to_sbus[real_irq];
 	if (sbusl)
-		return (((board + 1) << 5) + (sbusl << 2) + slot);
+		pil = sun4d_encode_irq(board, sbusl, slot);
+	else
+		pil = real_irq;
+
+	irq = irq_alloc(real_irq, pil);
+	if (irq == 0)
+		goto err_out;
+
+	handler_data = irq_get_handler_data(irq);
+	if (unlikely(handler_data))
+		goto err_out;
+
+	handler_data = kzalloc(sizeof(struct sun4d_handler_data), GFP_ATOMIC);
+	if (unlikely(!handler_data)) {
+		prom_printf("IRQ: kzalloc(sun4d_handler_data) failed.\n");
+		prom_halt();
+	}
+	handler_data->cpuid    = board_to_cpu[board];
+	handler_data->real_irq = real_irq;
+	irq_set_chip_and_handler_name(irq, &sun4d_irq,
+	                              handle_level_irq, "level");
+	irq_set_handler_data(irq, handler_data);
 
 err_out:
 	return real_irq;
@@ -518,6 +399,7 @@
 {
 	struct device_node *dp;
 	struct resource res;
+	unsigned int irq;
 	const u32 *reg;
 	int err;
 
@@ -552,9 +434,8 @@
 
 	master_l10_counter = &sun4d_timers->l10_cur_count;
 
-	err = request_irq(TIMER_IRQ, counter_fn,
-			  (IRQF_DISABLED | SA_STATIC_ALLOC),
-			  "timer", NULL);
+	irq = sun4d_build_device_irq(NULL, SUN4D_TIMER_IRQ);
+	err = request_irq(irq, counter_fn, IRQF_TIMER, "timer", NULL);
 	if (err) {
 		prom_printf("sun4d_init_timers: request_irq() failed with %d\n",
 		             err);
@@ -567,27 +448,16 @@
 void __init sun4d_init_sbi_irq(void)
 {
 	struct device_node *dp;
-	int target_cpu = 0;
+	int target_cpu;
 
-#ifdef CONFIG_SMP
 	target_cpu = boot_cpu_id;
-#endif
-
-	nsbi = 0;
-	for_each_node_by_name(dp, "sbi")
-		nsbi++;
-	sbus_actions = kzalloc(nsbi * 8 * 4 * sizeof(struct sbus_action), GFP_ATOMIC);
-	if (!sbus_actions) {
-		prom_printf("SUN4D: Cannot allocate sbus_actions, halting.\n");
-		prom_halt();
-	}
 	for_each_node_by_name(dp, "sbi") {
 		int devid = of_getintprop_default(dp, "device-id", 0);
 		int board = of_getintprop_default(dp, "board#", 0);
 		unsigned int mask;
 
 		set_sbi_tid(devid, target_cpu << 3);
-		sbus_tid[board] = target_cpu;
+		board_to_cpu[board] = target_cpu;
 
 		/* Get rid of pending irqs from PROM */
 		mask = acquire_sbi(devid, 0xffffffff);
@@ -603,12 +473,10 @@
 {
 	local_irq_disable();
 
-	BTFIXUPSET_CALL(enable_irq, sun4d_enable_irq, BTFIXUPCALL_NORM);
-	BTFIXUPSET_CALL(disable_irq, sun4d_disable_irq, BTFIXUPCALL_NORM);
 	BTFIXUPSET_CALL(clear_clock_irq, sun4d_clear_clock_irq, BTFIXUPCALL_NORM);
 	BTFIXUPSET_CALL(load_profile_irq, sun4d_load_profile_irq, BTFIXUPCALL_NORM);
 
-	sparc_irq_config.init_timers = sun4d_init_timers;
+	sparc_irq_config.init_timers      = sun4d_init_timers;
 	sparc_irq_config.build_device_irq = sun4d_build_device_irq;
 
 #ifdef CONFIG_SMP
diff --git a/arch/sparc/kernel/sun4d_smp.c b/arch/sparc/kernel/sun4d_smp.c
index 475d50b..1333879 100644
--- a/arch/sparc/kernel/sun4d_smp.c
+++ b/arch/sparc/kernel/sun4d_smp.c
@@ -32,6 +32,7 @@
 	return val;
 }
 
+static void smp4d_ipi_init(void);
 static void smp_setup_percpu_timer(void);
 
 static unsigned char cpu_leds[32];
@@ -80,8 +81,6 @@
 	local_flush_cache_all();
 	local_flush_tlb_all();
 
-	cpu_probe();
-
 	while ((unsigned long)current_set[cpuid] < PAGE_OFFSET)
 		barrier();
 
@@ -105,7 +104,7 @@
 
 	local_irq_enable();	/* We don't allow PIL 14 yet */
 
-	while (!cpu_isset(cpuid, smp_commenced_mask))
+	while (!cpumask_test_cpu(cpuid, &smp_commenced_mask))
 		barrier();
 
 	spin_lock_irqsave(&sun4d_imsk_lock, flags);
@@ -120,6 +119,7 @@
  */
 void __init smp4d_boot_cpus(void)
 {
+	smp4d_ipi_init();
 	if (boot_cpu_id)
 		current_set[0] = NULL;
 	smp_setup_percpu_timer();
@@ -191,6 +191,80 @@
 	sun4d_distribute_irqs();
 }
 
+/* Memory structure giving interrupt handler information about IPI generated */
+struct sun4d_ipi_work {
+	int single;
+	int msk;
+	int resched;
+};
+
+static DEFINE_PER_CPU_SHARED_ALIGNED(struct sun4d_ipi_work, sun4d_ipi_work);
+
+/* Initialize IPIs on the SUN4D SMP machine */
+static void __init smp4d_ipi_init(void)
+{
+	int cpu;
+	struct sun4d_ipi_work *work;
+
+	printk(KERN_INFO "smp4d: setup IPI at IRQ %d\n", SUN4D_IPI_IRQ);
+
+	for_each_possible_cpu(cpu) {
+		work = &per_cpu(sun4d_ipi_work, cpu);
+		work->single = work->msk = work->resched = 0;
+	}
+}
+
+void sun4d_ipi_interrupt(void)
+{
+	struct sun4d_ipi_work *work = &__get_cpu_var(sun4d_ipi_work);
+
+	if (work->single) {
+		work->single = 0;
+		smp_call_function_single_interrupt();
+	}
+	if (work->msk) {
+		work->msk = 0;
+		smp_call_function_interrupt();
+	}
+	if (work->resched) {
+		work->resched = 0;
+		smp_resched_interrupt();
+	}
+}
+
+static void smp4d_ipi_single(int cpu)
+{
+	struct sun4d_ipi_work *work = &per_cpu(sun4d_ipi_work, cpu);
+
+	/* Mark work */
+	work->single = 1;
+
+	/* Generate IRQ on the CPU */
+	sun4d_send_ipi(cpu, SUN4D_IPI_IRQ);
+}
+
+static void smp4d_ipi_mask_one(int cpu)
+{
+	struct sun4d_ipi_work *work = &per_cpu(sun4d_ipi_work, cpu);
+
+	/* Mark work */
+	work->msk = 1;
+
+	/* Generate IRQ on the CPU */
+	sun4d_send_ipi(cpu, SUN4D_IPI_IRQ);
+}
+
+static void smp4d_ipi_resched(int cpu)
+{
+	struct sun4d_ipi_work *work = &per_cpu(sun4d_ipi_work, cpu);
+
+	/* Mark work */
+	work->resched = 1;
+
+	/* Generate IRQ on the CPU (any IRQ will cause resched) */
+	sun4d_send_ipi(cpu, SUN4D_IPI_IRQ);
+}
+
 static struct smp_funcall {
 	smpfunc_t func;
 	unsigned long arg1;
@@ -239,10 +313,10 @@
 		{
 			register int i;
 
-			cpu_clear(smp_processor_id(), mask);
-			cpus_and(mask, cpu_online_map, mask);
+			cpumask_clear_cpu(smp_processor_id(), &mask);
+			cpumask_and(&mask, cpu_online_mask, &mask);
 			for (i = 0; i <= high; i++) {
-				if (cpu_isset(i, mask)) {
+				if (cpumask_test_cpu(i, &mask)) {
 					ccall_info.processors_in[i] = 0;
 					ccall_info.processors_out[i] = 0;
 					sun4d_send_ipi(i, IRQ_CROSS_CALL);
@@ -255,7 +329,7 @@
 
 			i = 0;
 			do {
-				if (!cpu_isset(i, mask))
+				if (!cpumask_test_cpu(i, &mask))
 					continue;
 				while (!ccall_info.processors_in[i])
 					barrier();
@@ -263,7 +337,7 @@
 
 			i = 0;
 			do {
-				if (!cpu_isset(i, mask))
+				if (!cpumask_test_cpu(i, &mask))
 					continue;
 				while (!ccall_info.processors_out[i])
 					barrier();
@@ -356,6 +430,9 @@
 	BTFIXUPSET_BLACKBOX(load_current, smp4d_blackbox_current);
 	BTFIXUPSET_CALL(smp_cross_call, smp4d_cross_call, BTFIXUPCALL_NORM);
 	BTFIXUPSET_CALL(__hard_smp_processor_id, __smp4d_processor_id, BTFIXUPCALL_NORM);
+	BTFIXUPSET_CALL(smp_ipi_resched, smp4d_ipi_resched, BTFIXUPCALL_NORM);
+	BTFIXUPSET_CALL(smp_ipi_single, smp4d_ipi_single, BTFIXUPCALL_NORM);
+	BTFIXUPSET_CALL(smp_ipi_mask_one, smp4d_ipi_mask_one, BTFIXUPCALL_NORM);
 
 	for (i = 0; i < NR_CPUS; i++) {
 		ccall_info.processors_in[i] = 1;
diff --git a/arch/sparc/kernel/sun4m_irq.c b/arch/sparc/kernel/sun4m_irq.c
index 69df625..422c16d 100644
--- a/arch/sparc/kernel/sun4m_irq.c
+++ b/arch/sparc/kernel/sun4m_irq.c
@@ -100,6 +100,11 @@
 struct sun4m_irq_percpu __iomem *sun4m_irq_percpu[SUN4M_NCPUS];
 struct sun4m_irq_global __iomem *sun4m_irq_global;
 
+struct sun4m_handler_data {
+	bool    percpu;
+	long    mask;
+};
+
 /* Dave Redman (djhr@tadpole.co.uk)
  * The sun4m interrupt registers.
  */
@@ -142,9 +147,9 @@
 #define	OBP_INT_LEVEL_VME	0x40
 
 #define SUN4M_TIMER_IRQ         (OBP_INT_LEVEL_ONBOARD | 10)
-#define SUM4M_PROFILE_IRQ       (OBP_INT_LEVEL_ONBOARD | 14)
+#define SUN4M_PROFILE_IRQ       (OBP_INT_LEVEL_ONBOARD | 14)
 
-static unsigned long irq_mask[0x50] = {
+static unsigned long sun4m_imask[0x50] = {
 	/* 0x00 - SMP */
 	0,  SUN4M_SOFT_INT(1),
 	SUN4M_SOFT_INT(2),  SUN4M_SOFT_INT(3),
@@ -169,7 +174,7 @@
 	SUN4M_INT_VIDEO, SUN4M_INT_MODULE,
 	SUN4M_INT_REALTIME, SUN4M_INT_FLOPPY,
 	(SUN4M_INT_SERIAL | SUN4M_INT_KBDMS),
-	SUN4M_INT_AUDIO, 0, SUN4M_INT_MODULE_ERR,
+	SUN4M_INT_AUDIO, SUN4M_INT_E14, SUN4M_INT_MODULE_ERR,
 	/* 0x30 - sbus */
 	0, 0, SUN4M_INT_SBUS(0), SUN4M_INT_SBUS(1),
 	0, SUN4M_INT_SBUS(2), 0, SUN4M_INT_SBUS(3),
@@ -182,105 +187,110 @@
 	0, SUN4M_INT_VME(6), 0, 0
 };
 
-static unsigned long sun4m_get_irqmask(unsigned int irq)
+static void sun4m_mask_irq(struct irq_data *data)
 {
-	unsigned long mask;
-
-	if (irq < 0x50)
-		mask = irq_mask[irq];
-	else
-		mask = 0;
-
-	if (!mask)
-		printk(KERN_ERR "sun4m_get_irqmask: IRQ%d has no valid mask!\n",
-		       irq);
-
-	return mask;
-}
-
-static void sun4m_disable_irq(unsigned int irq_nr)
-{
-	unsigned long mask, flags;
+	struct sun4m_handler_data *handler_data = data->handler_data;
 	int cpu = smp_processor_id();
 
-	mask = sun4m_get_irqmask(irq_nr);
-	local_irq_save(flags);
-	if (irq_nr > 15)
-		sbus_writel(mask, &sun4m_irq_global->mask_set);
-	else
-		sbus_writel(mask, &sun4m_irq_percpu[cpu]->set);
-	local_irq_restore(flags);
-}
+	if (handler_data->mask) {
+		unsigned long flags;
 
-static void sun4m_enable_irq(unsigned int irq_nr)
-{
-	unsigned long mask, flags;
-	int cpu = smp_processor_id();
-
-	/* Dreadful floppy hack. When we use 0x2b instead of
-	 * 0x0b the system blows (it starts to whistle!).
-	 * So we continue to use 0x0b. Fixme ASAP. --P3
-	 */
-	if (irq_nr != 0x0b) {
-		mask = sun4m_get_irqmask(irq_nr);
 		local_irq_save(flags);
-		if (irq_nr > 15)
-			sbus_writel(mask, &sun4m_irq_global->mask_clear);
-		else
-			sbus_writel(mask, &sun4m_irq_percpu[cpu]->clear);
-		local_irq_restore(flags);
-	} else {
-		local_irq_save(flags);
-		sbus_writel(SUN4M_INT_FLOPPY, &sun4m_irq_global->mask_clear);
+		if (handler_data->percpu) {
+			sbus_writel(handler_data->mask, &sun4m_irq_percpu[cpu]->set);
+		} else {
+			sbus_writel(handler_data->mask, &sun4m_irq_global->mask_set);
+		}
 		local_irq_restore(flags);
 	}
 }
 
-static unsigned long cpu_pil_to_imask[16] = {
-/*0*/	0x00000000,
-/*1*/	0x00000000,
-/*2*/	SUN4M_INT_SBUS(0) | SUN4M_INT_VME(0),
-/*3*/	SUN4M_INT_SBUS(1) | SUN4M_INT_VME(1),
-/*4*/	SUN4M_INT_SCSI,
-/*5*/	SUN4M_INT_SBUS(2) | SUN4M_INT_VME(2),
-/*6*/	SUN4M_INT_ETHERNET,
-/*7*/	SUN4M_INT_SBUS(3) | SUN4M_INT_VME(3),
-/*8*/	SUN4M_INT_VIDEO,
-/*9*/	SUN4M_INT_SBUS(4) | SUN4M_INT_VME(4) | SUN4M_INT_MODULE_ERR,
-/*10*/	SUN4M_INT_REALTIME,
-/*11*/	SUN4M_INT_SBUS(5) | SUN4M_INT_VME(5) | SUN4M_INT_FLOPPY,
-/*12*/	SUN4M_INT_SERIAL  | SUN4M_INT_KBDMS,
-/*13*/	SUN4M_INT_SBUS(6) | SUN4M_INT_VME(6) | SUN4M_INT_AUDIO,
-/*14*/	SUN4M_INT_E14,
-/*15*/	SUN4M_INT_ERROR,
-};
-
-/* We assume the caller has disabled local interrupts when these are called,
- * or else very bizarre behavior will result.
- */
-static void sun4m_disable_pil_irq(unsigned int pil)
+static void sun4m_unmask_irq(struct irq_data *data)
 {
-	sbus_writel(cpu_pil_to_imask[pil], &sun4m_irq_global->mask_set);
+	struct sun4m_handler_data *handler_data = data->handler_data;
+	int cpu = smp_processor_id();
+
+	if (handler_data->mask) {
+		unsigned long flags;
+
+		local_irq_save(flags);
+		if (handler_data->percpu) {
+			sbus_writel(handler_data->mask, &sun4m_irq_percpu[cpu]->clear);
+		} else {
+			sbus_writel(handler_data->mask, &sun4m_irq_global->mask_clear);
+		}
+		local_irq_restore(flags);
+	}
 }
 
-static void sun4m_enable_pil_irq(unsigned int pil)
+static unsigned int sun4m_startup_irq(struct irq_data *data)
 {
-	sbus_writel(cpu_pil_to_imask[pil], &sun4m_irq_global->mask_clear);
+	irq_link(data->irq);
+	sun4m_unmask_irq(data);
+	return 0;
+}
+
+static void sun4m_shutdown_irq(struct irq_data *data)
+{
+	sun4m_mask_irq(data);
+	irq_unlink(data->irq);
+}
+
+static struct irq_chip sun4m_irq = {
+	.name		= "sun4m",
+	.irq_startup	= sun4m_startup_irq,
+	.irq_shutdown	= sun4m_shutdown_irq,
+	.irq_mask	= sun4m_mask_irq,
+	.irq_unmask	= sun4m_unmask_irq,
+};
+
+
+static unsigned int sun4m_build_device_irq(struct platform_device *op,
+					   unsigned int real_irq)
+{
+	struct sun4m_handler_data *handler_data;
+	unsigned int irq;
+	unsigned int pil;
+
+	if (real_irq >= OBP_INT_LEVEL_VME) {
+		prom_printf("Bogus sun4m IRQ %u\n", real_irq);
+		prom_halt();
+	}
+	pil = (real_irq & 0xf);
+	irq = irq_alloc(real_irq, pil);
+
+	if (irq == 0)
+		goto out;
+
+	handler_data = irq_get_handler_data(irq);
+	if (unlikely(handler_data))
+		goto out;
+
+	handler_data = kzalloc(sizeof(struct sun4m_handler_data), GFP_ATOMIC);
+	if (unlikely(!handler_data)) {
+		prom_printf("IRQ: kzalloc(sun4m_handler_data) failed.\n");
+		prom_halt();
+	}
+
+	handler_data->mask = sun4m_imask[real_irq];
+	handler_data->percpu = real_irq < OBP_INT_LEVEL_ONBOARD;
+	irq_set_chip_and_handler_name(irq, &sun4m_irq,
+	                              handle_level_irq, "level");
+	irq_set_handler_data(irq, handler_data);
+
+out:
+	return irq;
 }
 
 #ifdef CONFIG_SMP
 static void sun4m_send_ipi(int cpu, int level)
 {
-	unsigned long mask = sun4m_get_irqmask(level);
-
-	sbus_writel(mask, &sun4m_irq_percpu[cpu]->set);
+	sbus_writel(SUN4M_SOFT_INT(level), &sun4m_irq_percpu[cpu]->set);
 }
 
 static void sun4m_clear_ipi(int cpu, int level)
 {
-	unsigned long mask = sun4m_get_irqmask(level);
-
-	sbus_writel(mask, &sun4m_irq_percpu[cpu]->clear);
+	sbus_writel(SUN4M_SOFT_INT(level), &sun4m_irq_percpu[cpu]->clear);
 }
 
 static void sun4m_set_udt(int cpu)
@@ -343,7 +353,15 @@
 	prom_halt();
 }
 
-/* Exported for sun4m_smp.c */
+void sun4m_unmask_profile_irq(void)
+{
+	unsigned long flags;
+
+	local_irq_save(flags);
+	sbus_writel(sun4m_imask[SUN4M_PROFILE_IRQ], &sun4m_irq_global->mask_clear);
+	local_irq_restore(flags);
+}
+
 void sun4m_clear_profile_irq(int cpu)
 {
 	sbus_readl(&timers_percpu[cpu]->l14_limit);
@@ -358,6 +376,7 @@
 {
 	struct device_node *dp = of_find_node_by_name(NULL, "counter");
 	int i, err, len, num_cpu_timers;
+	unsigned int irq;
 	const u32 *addr;
 
 	if (!dp) {
@@ -384,8 +403,9 @@
 
 	master_l10_counter = &timers_global->l10_count;
 
-	err = request_irq(SUN4M_TIMER_IRQ, counter_fn,
-			  (IRQF_DISABLED | SA_STATIC_ALLOC), "timer", NULL);
+	irq = sun4m_build_device_irq(NULL, SUN4M_TIMER_IRQ);
+
+	err = request_irq(irq, counter_fn, IRQF_TIMER, "timer", NULL);
 	if (err) {
 		printk(KERN_ERR "sun4m_init_timers: Register IRQ error %d.\n",
 			err);
@@ -452,14 +472,11 @@
 	if (num_cpu_iregs == 4)
 		sbus_writel(0, &sun4m_irq_global->interrupt_target);
 
-	BTFIXUPSET_CALL(enable_irq, sun4m_enable_irq, BTFIXUPCALL_NORM);
-	BTFIXUPSET_CALL(disable_irq, sun4m_disable_irq, BTFIXUPCALL_NORM);
-	BTFIXUPSET_CALL(enable_pil_irq, sun4m_enable_pil_irq, BTFIXUPCALL_NORM);
-	BTFIXUPSET_CALL(disable_pil_irq, sun4m_disable_pil_irq, BTFIXUPCALL_NORM);
 	BTFIXUPSET_CALL(clear_clock_irq, sun4m_clear_clock_irq, BTFIXUPCALL_NORM);
 	BTFIXUPSET_CALL(load_profile_irq, sun4m_load_profile_irq, BTFIXUPCALL_NORM);
 
 	sparc_irq_config.init_timers = sun4m_init_timers;
+	sparc_irq_config.build_device_irq = sun4m_build_device_irq;
 
 #ifdef CONFIG_SMP
 	BTFIXUPSET_CALL(set_cpu_int, sun4m_send_ipi, BTFIXUPCALL_NORM);
diff --git a/arch/sparc/kernel/sun4m_smp.c b/arch/sparc/kernel/sun4m_smp.c
index 5cc7dc5..5947686 100644
--- a/arch/sparc/kernel/sun4m_smp.c
+++ b/arch/sparc/kernel/sun4m_smp.c
@@ -15,6 +15,9 @@
 #include "irq.h"
 #include "kernel.h"
 
+#define IRQ_IPI_SINGLE		12
+#define IRQ_IPI_MASK		13
+#define IRQ_IPI_RESCHED		14
 #define IRQ_CROSS_CALL		15
 
 static inline unsigned long
@@ -26,6 +29,7 @@
 	return val;
 }
 
+static void smp4m_ipi_init(void);
 static void smp_setup_percpu_timer(void);
 
 void __cpuinit smp4m_callin(void)
@@ -59,8 +63,6 @@
 	local_flush_cache_all();
 	local_flush_tlb_all();
 
-	cpu_probe();
-
 	/* Fix idle thread fields. */
 	__asm__ __volatile__("ld [%0], %%g6\n\t"
 			     : : "r" (&current_set[cpuid])
@@ -70,7 +72,7 @@
 	atomic_inc(&init_mm.mm_count);
 	current->active_mm = &init_mm;
 
-	while (!cpu_isset(cpuid, smp_commenced_mask))
+	while (!cpumask_test_cpu(cpuid, &smp_commenced_mask))
 		mb();
 
 	local_irq_enable();
@@ -83,6 +85,7 @@
  */
 void __init smp4m_boot_cpus(void)
 {
+	smp4m_ipi_init();
 	smp_setup_percpu_timer();
 	local_flush_cache_all();
 }
@@ -150,18 +153,25 @@
 	/* Ok, they are spinning and ready to go. */
 }
 
-/* At each hardware IRQ, we get this called to forward IRQ reception
- * to the next processor.  The caller must disable the IRQ level being
- * serviced globally so that there are no double interrupts received.
- *
- * XXX See sparc64 irq.c.
- */
-void smp4m_irq_rotate(int cpu)
-{
-	int next = cpu_data(cpu).next;
 
-	if (next != cpu)
-		set_irq_udt(next);
+/* Initialize IPIs on the SUN4M SMP machine */
+static void __init smp4m_ipi_init(void)
+{
+}
+
+static void smp4m_ipi_resched(int cpu)
+{
+	set_cpu_int(cpu, IRQ_IPI_RESCHED);
+}
+
+static void smp4m_ipi_single(int cpu)
+{
+	set_cpu_int(cpu, IRQ_IPI_SINGLE);
+}
+
+static void smp4m_ipi_mask_one(int cpu)
+{
+	set_cpu_int(cpu, IRQ_IPI_MASK);
 }
 
 static struct smp_funcall {
@@ -199,10 +209,10 @@
 		{
 			register int i;
 
-			cpu_clear(smp_processor_id(), mask);
-			cpus_and(mask, cpu_online_map, mask);
+			cpumask_clear_cpu(smp_processor_id(), &mask);
+			cpumask_and(&mask, cpu_online_mask, &mask);
 			for (i = 0; i < ncpus; i++) {
-				if (cpu_isset(i, mask)) {
+				if (cpumask_test_cpu(i, &mask)) {
 					ccall_info.processors_in[i] = 0;
 					ccall_info.processors_out[i] = 0;
 					set_cpu_int(i, IRQ_CROSS_CALL);
@@ -218,7 +228,7 @@
 
 			i = 0;
 			do {
-				if (!cpu_isset(i, mask))
+				if (!cpumask_test_cpu(i, &mask))
 					continue;
 				while (!ccall_info.processors_in[i])
 					barrier();
@@ -226,7 +236,7 @@
 
 			i = 0;
 			do {
-				if (!cpu_isset(i, mask))
+				if (!cpumask_test_cpu(i, &mask))
 					continue;
 				while (!ccall_info.processors_out[i])
 					barrier();
@@ -277,7 +287,7 @@
 	load_profile_irq(cpu, lvl14_resolution);
 
 	if (cpu == boot_cpu_id)
-		enable_pil_irq(14);
+		sun4m_unmask_profile_irq();
 }
 
 static void __init smp4m_blackbox_id(unsigned *addr)
@@ -306,4 +316,7 @@
 	BTFIXUPSET_BLACKBOX(load_current, smp4m_blackbox_current);
 	BTFIXUPSET_CALL(smp_cross_call, smp4m_cross_call, BTFIXUPCALL_NORM);
 	BTFIXUPSET_CALL(__hard_smp_processor_id, __smp4m_processor_id, BTFIXUPCALL_NORM);
+	BTFIXUPSET_CALL(smp_ipi_resched, smp4m_ipi_resched, BTFIXUPCALL_NORM);
+	BTFIXUPSET_CALL(smp_ipi_single, smp4m_ipi_single, BTFIXUPCALL_NORM);
+	BTFIXUPSET_CALL(smp_ipi_mask_one, smp4m_ipi_mask_one, BTFIXUPCALL_NORM);
 }
diff --git a/arch/sparc/kernel/sysfs.c b/arch/sparc/kernel/sysfs.c
index 1eb8b00..7408201 100644
--- a/arch/sparc/kernel/sysfs.c
+++ b/arch/sparc/kernel/sysfs.c
@@ -103,9 +103,10 @@
 			        unsigned long (*func)(unsigned long),
 				unsigned long arg)
 {
-	cpumask_t old_affinity = current->cpus_allowed;
+	cpumask_t old_affinity;
 	unsigned long ret;
 
+	cpumask_copy(&old_affinity, tsk_cpus_allowed(current));
 	/* should return -EINVAL to userspace */
 	if (set_cpus_allowed_ptr(current, cpumask_of(cpu)))
 		return 0;
diff --git a/arch/sparc/kernel/time_32.c b/arch/sparc/kernel/time_32.c
index 96046a4..1060e06 100644
--- a/arch/sparc/kernel/time_32.c
+++ b/arch/sparc/kernel/time_32.c
@@ -228,14 +228,10 @@
 
 void __init time_init(void)
 {
-#ifdef CONFIG_PCI
-	extern void pci_time_init(void);
-	if (pcic_present()) {
+	if (pcic_present())
 		pci_time_init();
-		return;
-	}
-#endif
-	sbus_time_init();
+	else
+		sbus_time_init();
 }
 
 
diff --git a/arch/sparc/kernel/us2e_cpufreq.c b/arch/sparc/kernel/us2e_cpufreq.c
index 8f982b7..531d54f 100644
--- a/arch/sparc/kernel/us2e_cpufreq.c
+++ b/arch/sparc/kernel/us2e_cpufreq.c
@@ -237,7 +237,7 @@
 	if (!cpu_online(cpu))
 		return 0;
 
-	cpus_allowed = current->cpus_allowed;
+	cpumask_copy(&cpus_allowed, tsk_cpus_allowed(current));
 	set_cpus_allowed_ptr(current, cpumask_of(cpu));
 
 	clock_tick = sparc64_get_clock_tick(cpu) / 1000;
@@ -258,7 +258,7 @@
 	if (!cpu_online(cpu))
 		return;
 
-	cpus_allowed = current->cpus_allowed;
+	cpumask_copy(&cpus_allowed, tsk_cpus_allowed(current));
 	set_cpus_allowed_ptr(current, cpumask_of(cpu));
 
 	new_freq = clock_tick = sparc64_get_clock_tick(cpu) / 1000;
diff --git a/arch/sparc/kernel/us3_cpufreq.c b/arch/sparc/kernel/us3_cpufreq.c
index f35d1e7..9a8ceb7 100644
--- a/arch/sparc/kernel/us3_cpufreq.c
+++ b/arch/sparc/kernel/us3_cpufreq.c
@@ -85,7 +85,7 @@
 	if (!cpu_online(cpu))
 		return 0;
 
-	cpus_allowed = current->cpus_allowed;
+	cpumask_copy(&cpus_allowed, tsk_cpus_allowed(current));
 	set_cpus_allowed_ptr(current, cpumask_of(cpu));
 
 	reg = read_safari_cfg();
@@ -105,7 +105,7 @@
 	if (!cpu_online(cpu))
 		return;
 
-	cpus_allowed = current->cpus_allowed;
+	cpumask_copy(&cpus_allowed, tsk_cpus_allowed(current));
 	set_cpus_allowed_ptr(current, cpumask_of(cpu));
 
 	new_freq = sparc64_get_clock_tick(cpu) / 1000;
diff --git a/arch/sparc/lib/Makefile b/arch/sparc/lib/Makefile
index 846d1c4..7f01b8f 100644
--- a/arch/sparc/lib/Makefile
+++ b/arch/sparc/lib/Makefile
@@ -15,7 +15,6 @@
 lib-$(CONFIG_SPARC32) += copy_user.o locks.o
 lib-y                 += atomic_$(BITS).o
 lib-$(CONFIG_SPARC32) += lshrdi3.o ashldi3.o
-lib-$(CONFIG_SPARC32) += rwsem_32.o
 lib-$(CONFIG_SPARC32) += muldi3.o bitext.o cmpdi2.o
 
 lib-$(CONFIG_SPARC64) += copy_page.o clear_page.o bzero.o
diff --git a/arch/sparc/lib/rwsem_32.S b/arch/sparc/lib/rwsem_32.S
deleted file mode 100644
index 9675268..0000000
--- a/arch/sparc/lib/rwsem_32.S
+++ /dev/null
@@ -1,204 +0,0 @@
-/*
- * Assembly part of rw semaphores.
- *
- * Copyright (C) 1999 Jakub Jelinek (jakub@redhat.com)
- */
-
-#include <asm/ptrace.h>
-#include <asm/psr.h>
-
-	.section .sched.text, "ax"
-	.align	4
-
-	.globl		___down_read
-___down_read:
-	rd		%psr, %g3
-	nop
-	nop
-	nop
-	or		%g3, PSR_PIL, %g7
-	wr		%g7, 0, %psr
-	nop
-	nop
-	nop
-#ifdef CONFIG_SMP
-1:	ldstub		[%g1 + 4], %g7
-	tst		%g7
-	bne		1b
-	 ld		[%g1], %g7
-	sub		%g7, 1, %g7
-	st		%g7, [%g1]
-	stb		%g0, [%g1 + 4]
-#else
-	ld		[%g1], %g7
-	sub		%g7, 1, %g7
-	st		%g7, [%g1]
-#endif
-	wr		%g3, 0, %psr
-	add		%g7, 1, %g7
-	nop
-	nop
-	subcc		%g7, 1, %g7
-	bneg		3f
-	 nop
-2:	jmpl		%o7, %g0
-	 mov		%g4, %o7
-3:	save		%sp, -64, %sp
-	mov		%g1, %l1
-	mov		%g4, %l4
-	bcs		4f
-	 mov		%g5, %l5
-	call		down_read_failed
-	 mov		%l1, %o0
-	mov		%l1, %g1
-	mov		%l4, %g4
-	ba		___down_read
-	 restore	%l5, %g0, %g5
-4:	call		down_read_failed_biased
-	 mov		%l1, %o0
-	mov		%l1, %g1
-	mov		%l4, %g4
-	ba		2b
-	 restore	%l5, %g0, %g5
-
-	.globl		___down_write
-___down_write:
-	rd		%psr, %g3
-	nop
-	nop
-	nop
-	or		%g3, PSR_PIL, %g7
-	wr		%g7, 0, %psr
-	sethi		%hi(0x01000000), %g2
-	nop
-	nop
-#ifdef CONFIG_SMP
-1:	ldstub		[%g1 + 4], %g7
-	tst		%g7
-	bne		1b
-	 ld		[%g1], %g7
-	sub		%g7, %g2, %g7
-	st		%g7, [%g1]
-	stb		%g0, [%g1 + 4]
-#else
-	ld		[%g1], %g7
-	sub		%g7, %g2, %g7
-	st		%g7, [%g1]
-#endif
-	wr		%g3, 0, %psr
-	add		%g7, %g2, %g7
-	nop
-	nop
-	subcc		%g7, %g2, %g7
-	bne		3f
-	 nop
-2:	jmpl		%o7, %g0
-	 mov		%g4, %o7
-3:	save		%sp, -64, %sp
-	mov		%g1, %l1
-	mov		%g4, %l4
-	bcs		4f
-	 mov		%g5, %l5
-	call		down_write_failed
-	 mov		%l1, %o0
-	mov		%l1, %g1
-	mov		%l4, %g4
-	ba		___down_write
-	 restore	%l5, %g0, %g5
-4:	call		down_write_failed_biased
-	 mov		%l1, %o0
-	mov		%l1, %g1
-	mov		%l4, %g4
-	ba		2b
-	 restore	%l5, %g0, %g5
-
-	.text
-	.globl		___up_read
-___up_read:
-	rd		%psr, %g3
-	nop
-	nop
-	nop
-	or		%g3, PSR_PIL, %g7
-	wr		%g7, 0, %psr
-	nop
-	nop
-	nop
-#ifdef CONFIG_SMP
-1:	ldstub		[%g1 + 4], %g7
-	tst		%g7
-	bne		1b
-	 ld		[%g1], %g7
-	add		%g7, 1, %g7
-	st		%g7, [%g1]
-	stb		%g0, [%g1 + 4]
-#else
-	ld		[%g1], %g7
-	add		%g7, 1, %g7
-	st		%g7, [%g1]
-#endif
-	wr		%g3, 0, %psr
-	nop
-	nop
-	nop
-	cmp		%g7, 0
-	be		3f
-	 nop
-2:	jmpl		%o7, %g0
-	 mov		%g4, %o7
-3:	save		%sp, -64, %sp
-	mov		%g1, %l1
-	mov		%g4, %l4
-	mov		%g5, %l5
-	clr		%o1
-	call		__rwsem_wake
-	 mov		%l1, %o0
-	mov		%l1, %g1
-	mov		%l4, %g4
-	ba		2b
-	 restore	%l5, %g0, %g5
-
-	.globl		___up_write
-___up_write:
-	rd		%psr, %g3
-	nop
-	nop
-	nop
-	or		%g3, PSR_PIL, %g7
-	wr		%g7, 0, %psr
-	sethi		%hi(0x01000000), %g2
-	nop
-	nop
-#ifdef CONFIG_SMP
-1:	ldstub		[%g1 + 4], %g7
-	tst		%g7
-	bne		1b
-	 ld		[%g1], %g7
-	add		%g7, %g2, %g7
-	st		%g7, [%g1]
-	stb		%g0, [%g1 + 4]
-#else
-	ld		[%g1], %g7
-	add		%g7, %g2, %g7
-	st		%g7, [%g1]
-#endif
-	wr		%g3, 0, %psr
-	sub		%g7, %g2, %g7
-	nop
-	nop
-	addcc		%g7, %g2, %g7
-	bcs		3f
-	 nop
-2:	jmpl		%o7, %g0
-	 mov		%g4, %o7
-3:	save		%sp, -64, %sp
-	mov		%g1, %l1
-	mov		%g4, %l4
-	mov		%g5, %l5
-	mov		%g7, %o1
-	call		__rwsem_wake
-	 mov		%l1, %o0
-	mov		%l1, %g1
-	mov		%l4, %g4
-	ba		2b
-	 restore	%l5, %g0, %g5
diff --git a/arch/sparc/mm/init_64.c b/arch/sparc/mm/init_64.c
index 2f6ae1d..e10cd03 100644
--- a/arch/sparc/mm/init_64.c
+++ b/arch/sparc/mm/init_64.c
@@ -862,7 +862,7 @@
 	for (i = 0; i < NR_CPUS; i++)
 		numa_cpu_lookup_table[i] = 0;
 
-	numa_cpumask_lookup_table[0] = CPU_MASK_ALL;
+	cpumask_setall(&numa_cpumask_lookup_table[0]);
 }
 
 #ifdef CONFIG_NEED_MULTIPLE_NODES
@@ -1080,7 +1080,7 @@
 {
 	u64 arc;
 
-	cpus_clear(*mask);
+	cpumask_clear(mask);
 
 	mdesc_for_each_arc(arc, md, grp, MDESC_ARC_TYPE_BACK) {
 		u64 target = mdesc_arc_target(md, arc);
@@ -1091,7 +1091,7 @@
 			continue;
 		id = mdesc_get_property(md, target, "id", NULL);
 		if (*id < nr_cpu_ids)
-			cpu_set(*id, *mask);
+			cpumask_set_cpu(*id, mask);
 	}
 }
 
@@ -1153,13 +1153,13 @@
 
 	numa_parse_mdesc_group_cpus(md, grp, &mask);
 
-	for_each_cpu_mask(cpu, mask)
+	for_each_cpu(cpu, &mask)
 		numa_cpu_lookup_table[cpu] = index;
-	numa_cpumask_lookup_table[index] = mask;
+	cpumask_copy(&numa_cpumask_lookup_table[index], &mask);
 
 	if (numa_debug) {
 		printk(KERN_INFO "NUMA GROUP[%d]: cpus [ ", index);
-		for_each_cpu_mask(cpu, mask)
+		for_each_cpu(cpu, &mask)
 			printk("%d ", cpu);
 		printk("]\n");
 	}
@@ -1218,7 +1218,7 @@
 	index = 0;
 	for_each_present_cpu(cpu) {
 		numa_cpu_lookup_table[cpu] = index;
-		numa_cpumask_lookup_table[index] = cpumask_of_cpu(cpu);
+		cpumask_copy(&numa_cpumask_lookup_table[index], cpumask_of(cpu));
 		node_masks[index].mask = ~((1UL << 36UL) - 1UL);
 		node_masks[index].val = cpu << 36UL;
 
diff --git a/init/Kconfig b/init/Kconfig
index ffcdad7..c8b172e 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -827,11 +827,6 @@
 	  desktop applications.  Task group autogeneration is currently based
 	  upon task session.
 
-config SCHED_TTWU_QUEUE
-	bool
-	depends on !SPARC32
-	default y
-
 config MM_OWNER
 	bool
 
diff --git a/kernel/sched.c b/kernel/sched.c
index c62acf4..0516af4 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -2564,7 +2564,7 @@
 {
 	struct rq *rq = cpu_rq(cpu);
 
-#if defined(CONFIG_SMP) && defined(CONFIG_SCHED_TTWU_QUEUE)
+#if defined(CONFIG_SMP)
 	if (sched_feat(TTWU_QUEUE) && cpu != smp_processor_id()) {
 		ttwu_queue_remote(p, cpu);
 		return;