7 files changed, 294 insertions, 186 deletions

diff --git a/arch/mips/oprofile/Makefile b/arch/mips/oprofile/Makefile
index 02cc65e52d1..9c0a6782c09 100644
--- a/arch/mips/oprofile/Makefile
+++ b/arch/mips/oprofile/Makefile
@@ -1,5 +1,3 @@
-EXTRA_CFLAGS := -Werror
-
 obj-$(CONFIG_OPROFILE) += oprofile.o
 
 DRIVER_OBJS = $(addprefix ../../../drivers/oprofile/, \
@@ -8,11 +6,11 @@ DRIVER_OBJS = $(addprefix ../../../drivers/oprofile/, \
 		oprofilefs.o oprofile_stats.o \
 		timer_int.o )
 
-oprofile-y				:= $(DRIVER_OBJS) common.o
+oprofile-y				:= $(DRIVER_OBJS) common.o backtrace.o
 
 oprofile-$(CONFIG_CPU_MIPS32)		+= op_model_mipsxx.o
 oprofile-$(CONFIG_CPU_MIPS64)		+= op_model_mipsxx.o
 oprofile-$(CONFIG_CPU_R10000)		+= op_model_mipsxx.o
 oprofile-$(CONFIG_CPU_SB1)		+= op_model_mipsxx.o
-oprofile-$(CONFIG_CPU_RM9000)		+= op_model_rm9000.o
+oprofile-$(CONFIG_CPU_XLR)		+= op_model_mipsxx.o
 oprofile-$(CONFIG_CPU_LOONGSON2)	+= op_model_loongson2.o
diff --git a/arch/mips/oprofile/backtrace.c b/arch/mips/oprofile/backtrace.c
new file mode 100644
index 00000000000..6854ed5097d
--- /dev/null
+++ b/arch/mips/oprofile/backtrace.c
@@ -0,0 +1,175 @@
+#include <linux/oprofile.h>
+#include <linux/sched.h>
+#include <linux/mm.h>
+#include <linux/uaccess.h>
+#include <asm/ptrace.h>
+#include <asm/stacktrace.h>
+#include <linux/stacktrace.h>
+#include <linux/kernel.h>
+#include <asm/sections.h>
+#include <asm/inst.h>
+
+struct stackframe {
+	unsigned long sp;
+	unsigned long pc;
+	unsigned long ra;
+};
+
+static inline int get_mem(unsigned long addr, unsigned long *result)
+{
+	unsigned long *address = (unsigned long *) addr;
+	if (!access_ok(VERIFY_READ, addr, sizeof(unsigned long)))
+		return -1;
+	if (__copy_from_user_inatomic(result, address, sizeof(unsigned long)))
+		return -3;
+	return 0;
+}
+
+/*
+ * These two instruction helpers were taken from process.c
+ */
+static inline int is_ra_save_ins(union mips_instruction *ip)
+{
+	/* sw / sd $ra, offset($sp) */
+	return (ip->i_format.opcode == sw_op || ip->i_format.opcode == sd_op)
+		&& ip->i_format.rs == 29 && ip->i_format.rt == 31;
+}
+
+static inline int is_sp_move_ins(union mips_instruction *ip)
+{
+	/* addiu/daddiu sp,sp,-imm */
+	if (ip->i_format.rs != 29 || ip->i_format.rt != 29)
+		return 0;
+	if (ip->i_format.opcode == addiu_op || ip->i_format.opcode == daddiu_op)
+		return 1;
+	return 0;
+}
+
+/*
+ * Looks for specific instructions that mark the end of a function.
+ * This usually means we ran into the code area of the previous function.
+ */
+static inline int is_end_of_function_marker(union mips_instruction *ip)
+{
+	/* jr ra */
+	if (ip->r_format.func == jr_op && ip->r_format.rs == 31)
+		return 1;
+	/* lui gp */
+	if (ip->i_format.opcode == lui_op && ip->i_format.rt == 28)
+		return 1;
+	return 0;
+}
+
+/*
+ * TODO for userspace stack unwinding:
+ * - handle cases where the stack is adjusted inside a function
+ *     (generally doesn't happen)
+ * - find optimal value for max_instr_check
+ * - try to find a way to handle leaf functions
+ */
+
+static inline int unwind_user_frame(struct stackframe *old_frame,
+				    const unsigned int max_instr_check)
+{
+	struct stackframe new_frame = *old_frame;
+	off_t ra_offset = 0;
+	size_t stack_size = 0;
+	unsigned long addr;
+
+	if (old_frame->pc == 0 || old_frame->sp == 0 || old_frame->ra == 0)
+		return -9;
+
+	for (addr = new_frame.pc; (addr + max_instr_check > new_frame.pc)
+		&& (!ra_offset || !stack_size); --addr) {
+		union mips_instruction ip;
+
+		if (get_mem(addr, (unsigned long *) &ip))
+			return -11;
+
+		if (is_sp_move_ins(&ip)) {
+			int stack_adjustment = ip.i_format.simmediate;
+			if (stack_adjustment > 0)
+				/* This marks the end of the previous function,
+				   which means we overran. */
+				break;
+			stack_size = (unsigned) stack_adjustment;
+		} else if (is_ra_save_ins(&ip)) {
+			int ra_slot = ip.i_format.simmediate;
+			if (ra_slot < 0)
+				/* This shouldn't happen. */
+				break;
+			ra_offset = ra_slot;
+		} else if (is_end_of_function_marker(&ip))
+			break;
+	}
+
+	if (!ra_offset || !stack_size)
+		return -1;
+
+	if (ra_offset) {
+		new_frame.ra = old_frame->sp + ra_offset;
+		if (get_mem(new_frame.ra, &(new_frame.ra)))
+			return -13;
+	}
+
+	if (stack_size) {
+		new_frame.sp = old_frame->sp + stack_size;
+		if (get_mem(new_frame.sp, &(new_frame.sp)))
+			return -14;
+	}
+
+	if (new_frame.sp > old_frame->sp)
+		return -2;
+
+	new_frame.pc = old_frame->ra;
+	*old_frame = new_frame;
+
+	return 0;
+}
+
+static inline void do_user_backtrace(unsigned long low_addr,
+				     struct stackframe *frame,
+				     unsigned int depth)
+{
+	const unsigned int max_instr_check = 512;
+	const unsigned long high_addr = low_addr + THREAD_SIZE;
+
+	while (depth-- && !unwind_user_frame(frame, max_instr_check)) {
+		oprofile_add_trace(frame->ra);
+		if (frame->sp < low_addr || frame->sp > high_addr)
+			break;
+	}
+}
+
+#ifndef CONFIG_KALLSYMS
+static inline void do_kernel_backtrace(unsigned long low_addr,
+				       struct stackframe *frame,
+				       unsigned int depth) { }
+#else
+static inline void do_kernel_backtrace(unsigned long low_addr,
+				       struct stackframe *frame,
+				       unsigned int depth)
+{
+	while (depth-- && frame->pc) {
+		frame->pc = unwind_stack_by_address(low_addr,
+						    &(frame->sp),
+						    frame->pc,
+						    &(frame->ra));
+		oprofile_add_trace(frame->ra);
+	}
+}
+#endif
+
+void notrace op_mips_backtrace(struct pt_regs *const regs, unsigned int depth)
+{
+	struct stackframe frame = { .sp = regs->regs[29],
+				    .pc = regs->cp0_epc,
+				    .ra = regs->regs[31] };
+	const int userspace = user_mode(regs);
+	const unsigned long low_addr = ALIGN(frame.sp, THREAD_SIZE);
+
+	if (userspace)
+		do_user_backtrace(low_addr, &frame, depth);
+	else
+		do_kernel_backtrace(low_addr, &frame, depth);
+}
diff --git a/arch/mips/oprofile/common.c b/arch/mips/oprofile/common.c
index f9eb1aba634..e7473244947 100644
--- a/arch/mips/oprofile/common.c
+++ b/arch/mips/oprofile/common.c
@@ -12,11 +12,11 @@
 #include <linux/oprofile.h>
 #include <linux/smp.h>
 #include <asm/cpu-info.h>
+#include <asm/cpu-type.h>
 
 #include "op_impl.h"
 
 extern struct op_mips_model op_model_mipsxx_ops __weak;
-extern struct op_mips_model op_model_rm9000_ops __weak;
 extern struct op_mips_model op_model_loongson2_ops __weak;
 
 static struct op_mips_model *model;
@@ -28,13 +28,13 @@ static int op_mips_setup(void)
 	/* Pre-compute the values to stuff in the hardware registers.  */
 	model->reg_setup(ctr);
 
-	/* Configure the registers on all cpus.  */
+	/* Configure the registers on all cpus.	 */
 	on_each_cpu(model->cpu_setup, NULL, 1);
 
-        return 0;
+	return 0;
 }
 
-static int op_mips_create_files(struct super_block *sb, struct dentry *root)
+static int op_mips_create_files(struct dentry *root)
 {
 	int i;
 
@@ -43,16 +43,16 @@ static int op_mips_create_files(struct super_block *sb, struct dentry *root)
 		char buf[4];
 
 		snprintf(buf, sizeof buf, "%d", i);
-		dir = oprofilefs_mkdir(sb, root, buf);
-
-		oprofilefs_create_ulong(sb, dir, "enabled", &ctr[i].enabled);
-		oprofilefs_create_ulong(sb, dir, "event", &ctr[i].event);
-		oprofilefs_create_ulong(sb, dir, "count", &ctr[i].count);
-		oprofilefs_create_ulong(sb, dir, "kernel", &ctr[i].kernel);
-		oprofilefs_create_ulong(sb, dir, "user", &ctr[i].user);
-		oprofilefs_create_ulong(sb, dir, "exl", &ctr[i].exl);
+		dir = oprofilefs_mkdir(root, buf);
+
+		oprofilefs_create_ulong(dir, "enabled", &ctr[i].enabled);
+		oprofilefs_create_ulong(dir, "event", &ctr[i].event);
+		oprofilefs_create_ulong(dir, "count", &ctr[i].count);
+		oprofilefs_create_ulong(dir, "kernel", &ctr[i].kernel);
+		oprofilefs_create_ulong(dir, "user", &ctr[i].user);
+		oprofilefs_create_ulong(dir, "exl", &ctr[i].exl);
 		/* Dummy.  */
-		oprofilefs_create_ulong(sb, dir, "unit_mask", &ctr[i].unit_mask);
+		oprofilefs_create_ulong(dir, "unit_mask", &ctr[i].unit_mask);
 	}
 
 	return 0;
@@ -78,23 +78,29 @@ int __init oprofile_arch_init(struct oprofile_operations *ops)
 
 	switch (current_cpu_type()) {
 	case CPU_5KC:
+	case CPU_M14KC:
+	case CPU_M14KEC:
 	case CPU_20KC:
 	case CPU_24K:
 	case CPU_25KF:
 	case CPU_34K:
 	case CPU_1004K:
 	case CPU_74K:
+	case CPU_1074K:
+	case CPU_INTERAPTIV:
+	case CPU_PROAPTIV:
+	case CPU_P5600:
+	case CPU_M5150:
+	case CPU_LOONGSON1:
 	case CPU_SB1:
 	case CPU_SB1A:
 	case CPU_R10000:
 	case CPU_R12000:
 	case CPU_R14000:
+	case CPU_XLR:
 		lmodel = &op_model_mipsxx_ops;
 		break;
 
-	case CPU_RM9000:
-		lmodel = &op_model_rm9000_ops;
-		break;
 	case CPU_LOONGSON2:
 		lmodel = &op_model_loongson2_ops;
 		break;
@@ -111,10 +117,11 @@ int __init oprofile_arch_init(struct oprofile_operations *ops)
 
 	ops->create_files	= op_mips_create_files;
 	ops->setup		= op_mips_setup;
-	//ops->shutdown         = op_mips_shutdown;
+	//ops->shutdown		= op_mips_shutdown;
 	ops->start		= op_mips_start;
 	ops->stop		= op_mips_stop;
 	ops->cpu_type		= lmodel->cpu_type;
+	ops->backtrace		= op_mips_backtrace;
 
 	printk(KERN_INFO "oprofile: using %s performance monitoring.\n",
 	       lmodel->cpu_type);
diff --git a/arch/mips/oprofile/op_impl.h b/arch/mips/oprofile/op_impl.h
index f04b54fb37d..7c2da27ece0 100644
--- a/arch/mips/oprofile/op_impl.h
+++ b/arch/mips/oprofile/op_impl.h
@@ -36,4 +36,6 @@ struct op_mips_model {
 	unsigned char num_counters;
 };
 
+void op_mips_backtrace(struct pt_regs * const regs, unsigned int depth);
+
 #endif
diff --git a/arch/mips/oprofile/op_model_loongson2.c b/arch/mips/oprofile/op_model_loongson2.c
index 60d3ea60211..b249ec0bebb 100644
--- a/arch/mips/oprofile/op_model_loongson2.c
+++ b/arch/mips/oprofile/op_model_loongson2.c
@@ -18,13 +18,13 @@
 
 #define LOONGSON2_CPU_TYPE	"mips/loongson2"
 
-#define LOONGSON2_PERFCNT_OVERFLOW		(1ULL   << 31)
+#define LOONGSON2_PERFCNT_OVERFLOW		(1ULL	<< 31)
 
 #define LOONGSON2_PERFCTRL_EXL			(1UL	<<  0)
-#define LOONGSON2_PERFCTRL_KERNEL		(1UL    <<  1)
-#define LOONGSON2_PERFCTRL_SUPERVISOR		(1UL    <<  2)
-#define LOONGSON2_PERFCTRL_USER			(1UL    <<  3)
-#define LOONGSON2_PERFCTRL_ENABLE		(1UL    <<  4)
+#define LOONGSON2_PERFCTRL_KERNEL		(1UL	<<  1)
+#define LOONGSON2_PERFCTRL_SUPERVISOR		(1UL	<<  2)
+#define LOONGSON2_PERFCTRL_USER			(1UL	<<  3)
+#define LOONGSON2_PERFCTRL_ENABLE		(1UL	<<  4)
 #define LOONGSON2_PERFCTRL_EVENT(idx, event) \
 	(((event) & 0x0f) << ((idx) ? 9 : 5))
 
diff --git a/arch/mips/oprofile/op_model_mipsxx.c b/arch/mips/oprofile/op_model_mipsxx.c
index 54759f1669d..42821ae2d77 100644
--- a/arch/mips/oprofile/op_model_mipsxx.c
+++ b/arch/mips/oprofile/op_model_mipsxx.c
@@ -14,25 +14,39 @@
 
 #include "op_impl.h"
 
-#define M_PERFCTL_EXL			(1UL      <<  0)
-#define M_PERFCTL_KERNEL		(1UL      <<  1)
-#define M_PERFCTL_SUPERVISOR		(1UL      <<  2)
-#define M_PERFCTL_USER			(1UL      <<  3)
-#define M_PERFCTL_INTERRUPT_ENABLE	(1UL      <<  4)
+#define M_PERFCTL_EXL			(1UL	  <<  0)
+#define M_PERFCTL_KERNEL		(1UL	  <<  1)
+#define M_PERFCTL_SUPERVISOR		(1UL	  <<  2)
+#define M_PERFCTL_USER			(1UL	  <<  3)
+#define M_PERFCTL_INTERRUPT_ENABLE	(1UL	  <<  4)
 #define M_PERFCTL_EVENT(event)		(((event) & 0x3ff)  << 5)
-#define M_PERFCTL_VPEID(vpe)		((vpe)    << 16)
+#define M_PERFCTL_VPEID(vpe)		((vpe)	  << 16)
 #define M_PERFCTL_MT_EN(filter)		((filter) << 20)
-#define    M_TC_EN_ALL			M_PERFCTL_MT_EN(0)
-#define    M_TC_EN_VPE			M_PERFCTL_MT_EN(1)
-#define    M_TC_EN_TC			M_PERFCTL_MT_EN(2)
-#define M_PERFCTL_TCID(tcid)		((tcid)   << 22)
-#define M_PERFCTL_WIDE			(1UL      << 30)
-#define M_PERFCTL_MORE			(1UL      << 31)
+#define	   M_TC_EN_ALL			M_PERFCTL_MT_EN(0)
+#define	   M_TC_EN_VPE			M_PERFCTL_MT_EN(1)
+#define	   M_TC_EN_TC			M_PERFCTL_MT_EN(2)
+#define M_PERFCTL_TCID(tcid)		((tcid)	  << 22)
+#define M_PERFCTL_WIDE			(1UL	  << 30)
+#define M_PERFCTL_MORE			(1UL	  << 31)
 
-#define M_COUNTER_OVERFLOW		(1UL      << 31)
+#define M_COUNTER_OVERFLOW		(1UL	  << 31)
+
+/* Netlogic XLR specific, count events in all threads in a core */
+#define M_PERFCTL_COUNT_ALL_THREADS	(1UL	  << 13)
 
 static int (*save_perf_irq)(void);
 
+/*
+ * XLR has only one set of counters per core. Designate the
+ * first hardware thread in the core for setup and init.
+ * Skip CPUs with non-zero hardware thread id (4 hwt per core)
+ */
+#if defined(CONFIG_CPU_XLR) && defined(CONFIG_SMP)
+#define oprofile_skip_cpu(c)	((cpu_logical_map(c) & 0x3) != 0)
+#else
+#define oprofile_skip_cpu(c)	0
+#endif
+
 #ifdef CONFIG_MIPS_MT_SMP
 static int cpu_has_mipsmt_pertccounters;
 #define WHAT		(M_TC_EN_VPE | \
@@ -129,7 +143,7 @@ static struct mipsxx_register_config {
 	unsigned int counter[4];
 } reg;
 
-/* Compute all of the registers in preparation for enabling profiling.  */
+/* Compute all of the registers in preparation for enabling profiling.	*/
 
 static void mipsxx_reg_setup(struct op_counter_config *ctr)
 {
@@ -145,23 +159,28 @@ static void mipsxx_reg_setup(struct op_counter_config *ctr)
 			continue;
 
 		reg.control[i] = M_PERFCTL_EVENT(ctr[i].event) |
-		                 M_PERFCTL_INTERRUPT_ENABLE;
+				 M_PERFCTL_INTERRUPT_ENABLE;
 		if (ctr[i].kernel)
 			reg.control[i] |= M_PERFCTL_KERNEL;
 		if (ctr[i].user)
 			reg.control[i] |= M_PERFCTL_USER;
 		if (ctr[i].exl)
 			reg.control[i] |= M_PERFCTL_EXL;
+		if (boot_cpu_type() == CPU_XLR)
+			reg.control[i] |= M_PERFCTL_COUNT_ALL_THREADS;
 		reg.counter[i] = 0x80000000 - ctr[i].count;
 	}
 }
 
-/* Program all of the registers in preparation for enabling profiling.  */
+/* Program all of the registers in preparation for enabling profiling.	*/
 
 static void mipsxx_cpu_setup(void *args)
 {
 	unsigned int counters = op_model_mipsxx_ops.num_counters;
 
+	if (oprofile_skip_cpu(smp_processor_id()))
+		return;
+
 	switch (counters) {
 	case 4:
 		w_c0_perfctrl3(0);
@@ -183,6 +202,9 @@ static void mipsxx_cpu_start(void *args)
 {
 	unsigned int counters = op_model_mipsxx_ops.num_counters;
 
+	if (oprofile_skip_cpu(smp_processor_id()))
+		return;
+
 	switch (counters) {
 	case 4:
 		w_c0_perfctrl3(WHAT | reg.control[3]);
@@ -200,6 +222,9 @@ static void mipsxx_cpu_stop(void *args)
 {
 	unsigned int counters = op_model_mipsxx_ops.num_counters;
 
+	if (oprofile_skip_cpu(smp_processor_id()))
+		return;
+
 	switch (counters) {
 	case 4:
 		w_c0_perfctrl3(0);
@@ -298,6 +323,11 @@ static void reset_counters(void *arg)
 	}
 }
 
+static irqreturn_t mipsxx_perfcount_int(int irq, void *dev_id)
+{
+	return mipsxx_perfcount_handler();
+}
+
 static int __init mipsxx_init(void)
 {
 	int counters;
@@ -317,6 +347,14 @@ static int __init mipsxx_init(void)
 
 	op_model_mipsxx_ops.num_counters = counters;
 	switch (current_cpu_type()) {
+	case CPU_M14KC:
+		op_model_mipsxx_ops.cpu_type = "mips/M14Kc";
+		break;
+
+	case CPU_M14KEC:
+		op_model_mipsxx_ops.cpu_type = "mips/M14KEc";
+		break;
+
 	case CPU_20KC:
 		op_model_mipsxx_ops.cpu_type = "mips/20K";
 		break;
@@ -330,20 +368,31 @@ static int __init mipsxx_init(void)
 		break;
 
 	case CPU_1004K:
-#if 0
-		/* FIXME: report as 34K for now */
-		op_model_mipsxx_ops.cpu_type = "mips/1004K";
-		break;
-#endif
-
 	case CPU_34K:
 		op_model_mipsxx_ops.cpu_type = "mips/34K";
 		break;
 
+	case CPU_1074K:
 	case CPU_74K:
 		op_model_mipsxx_ops.cpu_type = "mips/74K";
 		break;
 
+	case CPU_INTERAPTIV:
+		op_model_mipsxx_ops.cpu_type = "mips/interAptiv";
+		break;
+
+	case CPU_PROAPTIV:
+		op_model_mipsxx_ops.cpu_type = "mips/proAptiv";
+		break;
+
+	case CPU_P5600:
+		op_model_mipsxx_ops.cpu_type = "mips/P5600";
+		break;
+
+	case CPU_M5150:
+		op_model_mipsxx_ops.cpu_type = "mips/M5150";
+		break;
+
 	case CPU_5KC:
 		op_model_mipsxx_ops.cpu_type = "mips/5K";
 		break;
@@ -365,6 +414,14 @@ static int __init mipsxx_init(void)
 		op_model_mipsxx_ops.cpu_type = "mips/sb1";
 		break;
 
+	case CPU_LOONGSON1:
+		op_model_mipsxx_ops.cpu_type = "mips/loongson1";
+		break;
+
+	case CPU_XLR:
+		op_model_mipsxx_ops.cpu_type = "mips/xlr";
+		break;
+
 	default:
 		printk(KERN_ERR "Profiling unsupported for this CPU\n");
 
@@ -374,6 +431,10 @@ static int __init mipsxx_init(void)
 	save_perf_irq = perf_irq;
 	perf_irq = mipsxx_perfcount_handler;
 
+	if ((cp0_perfcount_irq >= 0) && (cp0_compare_irq != cp0_perfcount_irq))
+		return request_irq(cp0_perfcount_irq, mipsxx_perfcount_int,
+			0, "Perfcounter", save_perf_irq);
+
 	return 0;
 }
 
@@ -381,6 +442,9 @@ static void mipsxx_exit(void)
 {
 	int counters = op_model_mipsxx_ops.num_counters;
 
+	if ((cp0_perfcount_irq >= 0) && (cp0_compare_irq != cp0_perfcount_irq))
+		free_irq(cp0_perfcount_irq, save_perf_irq);
+
 	counters = counters_per_cpu_to_total(counters);
 	on_each_cpu(reset_counters, (void *)(long)counters, 1);
 
diff --git a/arch/mips/oprofile/op_model_rm9000.c b/arch/mips/oprofile/op_model_rm9000.c
deleted file mode 100644
index 3aa81384966..00000000000
--- a/arch/mips/oprofile/op_model_rm9000.c
+++ /dev/null
@@ -1,138 +0,0 @@
-/*
- * This file is subject to the terms and conditions of the GNU General Public
- * License.  See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * Copyright (C) 2004 by Ralf Baechle
- */
-#include <linux/init.h>
-#include <linux/oprofile.h>
-#include <linux/interrupt.h>
-#include <linux/smp.h>
-
-#include "op_impl.h"
-
-#define RM9K_COUNTER1_EVENT(event)	((event) << 0)
-#define RM9K_COUNTER1_SUPERVISOR	(1ULL    <<  7)
-#define RM9K_COUNTER1_KERNEL		(1ULL    <<  8)
-#define RM9K_COUNTER1_USER		(1ULL    <<  9)
-#define RM9K_COUNTER1_ENABLE		(1ULL    << 10)
-#define RM9K_COUNTER1_OVERFLOW		(1ULL    << 15)
-
-#define RM9K_COUNTER2_EVENT(event)	((event) << 16)
-#define RM9K_COUNTER2_SUPERVISOR	(1ULL    << 23)
-#define RM9K_COUNTER2_KERNEL		(1ULL    << 24)
-#define RM9K_COUNTER2_USER		(1ULL    << 25)
-#define RM9K_COUNTER2_ENABLE		(1ULL    << 26)
-#define RM9K_COUNTER2_OVERFLOW		(1ULL    << 31)
-
-extern unsigned int rm9000_perfcount_irq;
-
-static struct rm9k_register_config {
-	unsigned int control;
-	unsigned int reset_counter1;
-	unsigned int reset_counter2;
-} reg;
-
-/* Compute all of the registers in preparation for enabling profiling.  */
-
-static void rm9000_reg_setup(struct op_counter_config *ctr)
-{
-	unsigned int control = 0;
-
-	/* Compute the performance counter control word.  */
-	/* For now count kernel and user mode */
-	if (ctr[0].enabled)
-		control |= RM9K_COUNTER1_EVENT(ctr[0].event) |
-		           RM9K_COUNTER1_KERNEL |
-		           RM9K_COUNTER1_USER |
-		           RM9K_COUNTER1_ENABLE;
-	if (ctr[1].enabled)
-		control |= RM9K_COUNTER2_EVENT(ctr[1].event) |
-		           RM9K_COUNTER2_KERNEL |
-		           RM9K_COUNTER2_USER |
-		           RM9K_COUNTER2_ENABLE;
-	reg.control = control;
-
-	reg.reset_counter1 = 0x80000000 - ctr[0].count;
-	reg.reset_counter2 = 0x80000000 - ctr[1].count;
-}
-
-/* Program all of the registers in preparation for enabling profiling.  */
-
-static void rm9000_cpu_setup(void *args)
-{
-	uint64_t perfcount;
-
-	perfcount = ((uint64_t) reg.reset_counter2 << 32) | reg.reset_counter1;
-	write_c0_perfcount(perfcount);
-}
-
-static void rm9000_cpu_start(void *args)
-{
-	/* Start all counters on current CPU */
-	write_c0_perfcontrol(reg.control);
-}
-
-static void rm9000_cpu_stop(void *args)
-{
-	/* Stop all counters on current CPU */
-	write_c0_perfcontrol(0);
-}
-
-static irqreturn_t rm9000_perfcount_handler(int irq, void *dev_id)
-{
-	unsigned int control = read_c0_perfcontrol();
-	struct pt_regs *regs = get_irq_regs();
-	uint32_t counter1, counter2;
-	uint64_t counters;
-
-	/*
-	 * RM9000 combines two 32-bit performance counters into a single
-	 * 64-bit coprocessor zero register.  To avoid a race updating the
-	 * registers we need to stop the counters while we're messing with
-	 * them ...
-	 */
-	write_c0_perfcontrol(0);
-
-	counters = read_c0_perfcount();
-	counter1 = counters;
-	counter2 = counters >> 32;
-
-	if (control & RM9K_COUNTER1_OVERFLOW) {
-		oprofile_add_sample(regs, 0);
-		counter1 = reg.reset_counter1;
-	}
-	if (control & RM9K_COUNTER2_OVERFLOW) {
-		oprofile_add_sample(regs, 1);
-		counter2 = reg.reset_counter2;
-	}
-
-	counters = ((uint64_t)counter2 << 32) | counter1;
-	write_c0_perfcount(counters);
-	write_c0_perfcontrol(reg.control);
-
-	return IRQ_HANDLED;
-}
-
-static int __init rm9000_init(void)
-{
-	return request_irq(rm9000_perfcount_irq, rm9000_perfcount_handler,
-	                   0, "Perfcounter", NULL);
-}
-
-static void rm9000_exit(void)
-{
-	free_irq(rm9000_perfcount_irq, NULL);
-}
-
-struct op_mips_model op_model_rm9000_ops = {
-	.reg_setup	= rm9000_reg_setup,
-	.cpu_setup	= rm9000_cpu_setup,
-	.init		= rm9000_init,
-	.exit		= rm9000_exit,
-	.cpu_start	= rm9000_cpu_start,
-	.cpu_stop	= rm9000_cpu_stop,
-	.cpu_type	= "mips/rm9000",
-	.num_counters	= 2
-};