1 files changed, 161 insertions, 0 deletions
diff --git a/arch/ppc/oprofile/common.c b/arch/ppc/oprofile/common.c
new file mode 100644
index 00000000000..3169c67abea
--- /dev/null
+++ b/arch/ppc/oprofile/common.c
@@ -0,0 +1,161 @@
+/*
+ * PPC 32 oprofile support
+ * Based on PPC64 oprofile support
+ * Copyright (C) 2004 Anton Blanchard <anton@au.ibm.com>, IBM
+ *
+ * Copyright (C) Freescale Semiconductor, Inc 2004
+ *
+ * Author: Andy Fleming
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/oprofile.h>
+#include <linux/slab.h>
+#include <linux/init.h>
+#include <linux/smp.h>
+#include <linux/errno.h>
+#include <asm/ptrace.h>
+#include <asm/system.h>
+#include <asm/perfmon.h>
+#include <asm/cputable.h>
+
+#include "op_impl.h"
+
+static struct op_ppc32_model *model;
+
+static struct op_counter_config ctr[OP_MAX_COUNTER];
+static struct op_system_config sys;
+
+static void op_handle_interrupt(struct pt_regs *regs)
+{
+	model->handle_interrupt(regs, ctr);
+}
+
+static int op_ppc32_setup(void)
+{
+	/* Install our interrupt handler into the existing hook.  */
+	if(request_perfmon_irq(&op_handle_interrupt))
+		return -EBUSY;
+
+	mb();
+
+	/* Pre-compute the values to stuff in the hardware registers.  */
+	model->reg_setup(ctr, &sys, model->num_counters);
+
+#if 0
+	/* FIXME: Make multi-cpu work */
+	/* Configure the registers on all cpus.  */
+	on_each_cpu(model->reg_setup, NULL, 0, 1);
+#endif
+
+	return 0;
+}
+
+static void op_ppc32_shutdown(void)
+{
+	mb();
+
+	/* Remove our interrupt handler. We may be removing this module. */
+	free_perfmon_irq();
+}
+
+static void op_ppc32_cpu_start(void *dummy)
+{
+	model->start(ctr);
+}
+
+static int op_ppc32_start(void)
+{
+	on_each_cpu(op_ppc32_cpu_start, NULL, 0, 1);
+	return 0;
+}
+
+static inline void op_ppc32_cpu_stop(void *dummy)
+{
+	model->stop();
+}
+
+static void op_ppc32_stop(void)
+{
+	on_each_cpu(op_ppc32_cpu_stop, NULL, 0, 1);
+}
+
+static int op_ppc32_create_files(struct super_block *sb, struct dentry *root)
+{
+	int i;
+
+	for (i = 0; i < model->num_counters; ++i) {
+		struct dentry *dir;
+		char buf[3];
+
+		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);
+
+		/* FIXME: Not sure if this is used */
+		oprofilefs_create_ulong(sb, dir, "unit_mask", &ctr[i].unit_mask);
+	}
+
+	oprofilefs_create_ulong(sb, root, "enable_kernel", &sys.enable_kernel);
+	oprofilefs_create_ulong(sb, root, "enable_user", &sys.enable_user);
+
+	/* Default to tracing both kernel and user */
+	sys.enable_kernel = 1;
+	sys.enable_user = 1;
+
+	return 0;
+}
+
+static struct oprofile_operations oprof_ppc32_ops = {
+	.create_files	= op_ppc32_create_files,
+	.setup		= op_ppc32_setup,
+	.shutdown	= op_ppc32_shutdown,
+	.start		= op_ppc32_start,
+	.stop		= op_ppc32_stop,
+	.cpu_type	= NULL		/* To be filled in below. */
+};
+
+int __init oprofile_arch_init(struct oprofile_operations *ops)
+{
+	char *name;
+	int cpu_id = smp_processor_id();
+
+#ifdef CONFIG_FSL_BOOKE
+	model = &op_model_fsl_booke;
+#else
+	return -ENODEV;
+#endif
+
+	name = kmalloc(32, GFP_KERNEL);
+
+	if (NULL == name)
+		return -ENOMEM;
+
+	sprintf(name, "ppc/%s", cur_cpu_spec[cpu_id]->cpu_name);
+
+	oprof_ppc32_ops.cpu_type = name;
+
+	model->num_counters = cur_cpu_spec[cpu_id]->num_pmcs;
+
+	*ops = oprof_ppc32_ops;
+
+	printk(KERN_INFO "oprofile: using %s performance monitoring.\n",
+	       oprof_ppc32_ops.cpu_type);
+
+	return 0;
+}
+
+void oprofile_arch_exit(void)
+{
+	kfree(oprof_ppc32_ops.cpu_type);
+	oprof_ppc32_ops.cpu_type = NULL;
+}