1 files changed, 195 insertions, 0 deletions
diff --git a/arch/powerpc/oprofile/common.c b/arch/powerpc/oprofile/common.c
new file mode 100644
index 000000000000..af2c05d20ba5
--- /dev/null
+++ b/arch/powerpc/oprofile/common.c
@@ -0,0 +1,195 @@
+/*
+ * PPC 64 oprofile support:
+ * Copyright (C) 2004 Anton Blanchard <anton@au.ibm.com>, IBM
+ * PPC 32 oprofile support: (based on PPC 64 support)
+ * Copyright (C) Freescale Semiconductor, Inc 2004
+ *	Author: Andy Fleming
+ *
+ * Based on alpha version.
+ *
+ * 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>
+#ifndef __powerpc64__
+#include <linux/slab.h>
+#endif /* ! __powerpc64__ */
+#include <linux/init.h>
+#include <linux/smp.h>
+#include <linux/errno.h>
+#include <asm/ptrace.h>
+#include <asm/system.h>
+#include <asm/pmc.h>
+#include <asm/cputable.h>
+#include <asm/oprofile_impl.h>
+
+static struct op_powerpc_model *model;
+
+static struct op_counter_config ctr[OP_MAX_COUNTER];
+static struct op_system_config sys;
+
+#ifndef __powerpc64__
+static char *cpu_type;
+#endif /* ! __powerpc64__ */
+
+static void op_handle_interrupt(struct pt_regs *regs)
+{
+	model->handle_interrupt(regs, ctr);
+}
+
+static int op_powerpc_setup(void)
+{
+	int err;
+
+	/* Grab the hardware */
+	err = reserve_pmc_hardware(op_handle_interrupt);
+	if (err)
+		return err;
+
+	/* Pre-compute the values to stuff in the hardware registers.  */
+	model->reg_setup(ctr, &sys, model->num_counters);
+
+	/* Configure the registers on all cpus.  */
+#ifdef __powerpc64__
+	on_each_cpu(model->cpu_setup, NULL, 0, 1);
+#else /* __powerpc64__ */
+#if 0
+	/* FIXME: Make multi-cpu work */
+	on_each_cpu(model->reg_setup, NULL, 0, 1);
+#endif
+#endif /* __powerpc64__ */
+
+	return 0;
+}
+
+static void op_powerpc_shutdown(void)
+{
+	release_pmc_hardware();
+}
+
+static void op_powerpc_cpu_start(void *dummy)
+{
+	model->start(ctr);
+}
+
+static int op_powerpc_start(void)
+{
+	on_each_cpu(op_powerpc_cpu_start, NULL, 0, 1);
+	return 0;
+}
+
+static inline void op_powerpc_cpu_stop(void *dummy)
+{
+	model->stop();
+}
+
+static void op_powerpc_stop(void)
+{
+	on_each_cpu(op_powerpc_cpu_stop, NULL, 0, 1);
+}
+
+static int op_powerpc_create_files(struct super_block *sb, struct dentry *root)
+{
+	int i;
+
+#ifdef __powerpc64__
+	/*
+	 * There is one mmcr0, mmcr1 and mmcra for setting the events for
+	 * all of the counters.
+	 */
+	oprofilefs_create_ulong(sb, root, "mmcr0", &sys.mmcr0);
+	oprofilefs_create_ulong(sb, root, "mmcr1", &sys.mmcr1);
+	oprofilefs_create_ulong(sb, root, "mmcra", &sys.mmcra);
+#endif /* __powerpc64__ */
+
+	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);
+#ifdef __powerpc64__
+		/*
+		 * We dont support per counter user/kernel selection, but
+		 * we leave the entries because userspace expects them
+		 */
+#endif /* __powerpc64__ */
+		oprofilefs_create_ulong(sb, dir, "kernel", &ctr[i].kernel);
+		oprofilefs_create_ulong(sb, dir, "user", &ctr[i].user);
+
+#ifndef __powerpc64__
+		/* FIXME: Not sure if this is used */
+#endif /* ! __powerpc64__ */
+		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);
+#ifdef __powerpc64__
+	oprofilefs_create_ulong(sb, root, "backtrace_spinlocks",
+				&sys.backtrace_spinlocks);
+#endif /* __powerpc64__ */
+
+	/* Default to tracing both kernel and user */
+	sys.enable_kernel = 1;
+	sys.enable_user = 1;
+#ifdef __powerpc64__
+	/* Turn on backtracing through spinlocks by default */
+	sys.backtrace_spinlocks = 1;
+#endif /* __powerpc64__ */
+
+	return 0;
+}
+
+int __init oprofile_arch_init(struct oprofile_operations *ops)
+{
+#ifndef __powerpc64__
+#ifdef CONFIG_FSL_BOOKE
+	model = &op_model_fsl_booke;
+#else
+	return -ENODEV;
+#endif
+
+	cpu_type = kmalloc(32, GFP_KERNEL);
+	if (NULL == cpu_type)
+		return -ENOMEM;
+
+	sprintf(cpu_type, "ppc/%s", cur_cpu_spec->cpu_name);
+
+	model->num_counters = cur_cpu_spec->num_pmcs;
+
+	ops->cpu_type = cpu_type;
+#else /* __powerpc64__ */
+	if (!cur_cpu_spec->oprofile_model || !cur_cpu_spec->oprofile_cpu_type)
+		return -ENODEV;
+	model = cur_cpu_spec->oprofile_model;
+	model->num_counters = cur_cpu_spec->num_pmcs;
+
+	ops->cpu_type = cur_cpu_spec->oprofile_cpu_type;
+#endif /* __powerpc64__ */
+	ops->create_files = op_powerpc_create_files;
+	ops->setup = op_powerpc_setup;
+	ops->shutdown = op_powerpc_shutdown;
+	ops->start = op_powerpc_start;
+	ops->stop = op_powerpc_stop;
+
+	printk(KERN_INFO "oprofile: using %s performance monitoring.\n",
+	       ops->cpu_type);
+
+	return 0;
+}
+
+void oprofile_arch_exit(void)
+{
+#ifndef __powerpc64__
+	kfree(cpu_type);
+	cpu_type = NULL;
+#endif /* ! __powerpc64__ */
+}