Signed-off-by: Siarhei Siamashka <siarhei.siamashka@xxxxxxxxx>
---
arch/arm/Kconfig | 6 ++
arch/arm/oprofile/Makefile | 1 +
arch/arm/oprofile/common.c | 5 ++
arch/arm/oprofile/op_arm_model.h | 2 +
arch/arm/oprofile/op_model_omap_gptimer.c | 76 +++++++++++++++++++++++++++++
5 files changed, 90 insertions(+), 0 deletions(-)
create mode 100644 arch/arm/oprofile/op_model_omap_gptimer.c
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 72b45cd..5f0acee 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -161,6 +161,12 @@ config GENERIC_HARDIRQS_NO__DO_IRQ
if OPROFILE
+config OPROFILE_OMAP_GPTIMER
+ def_bool y
+ depends on ARCH_OMAP
+ select CONFIG_OMAP_32K_TIMER
+ select CONFIG_OMAP_DM_TIMER
+
config OPROFILE_ARMV6
def_bool y
depends on CPU_V6 && !SMP
diff --git a/arch/arm/oprofile/Makefile b/arch/arm/oprofile/Makefile
index 88e31f5..7e9f76e 100644
--- a/arch/arm/oprofile/Makefile
+++ b/arch/arm/oprofile/Makefile
@@ -10,5 +10,6 @@ oprofile-y := $(DRIVER_OBJS) common.o backtrace.o
oprofile-$(CONFIG_CPU_XSCALE) += op_model_xscale.o
oprofile-$(CONFIG_OPROFILE_ARM11_CORE) += op_model_arm11_core.o
oprofile-$(CONFIG_OPROFILE_ARMV6) += op_model_v6.o
+oprofile-$(CONFIG_OPROFILE_OMAP_GPTIMER) += op_model_omap_gptimer.o
oprofile-$(CONFIG_OPROFILE_MPCORE) += op_model_mpcore.o
oprofile-$(CONFIG_OPROFILE_ARMV7) += op_model_v7.o
diff --git a/arch/arm/oprofile/common.c b/arch/arm/oprofile/common.c
index 3fcd752..add3cb4 100644
--- a/arch/arm/oprofile/common.c
+++ b/arch/arm/oprofile/common.c
@@ -133,6 +133,11 @@ int __init oprofile_arch_init(struct oprofile_operations *ops)
ops->backtrace = arm_backtrace;
+/* comes first, so that it can be overrided by a better implementation */
+#ifdef CONFIG_OPROFILE_OMAP_GPTIMER
+ spec = &op_omap_gptimer_spec;
+#endif
+
#ifdef CONFIG_CPU_XSCALE
spec = &op_xscale_spec;
#endif
diff --git a/arch/arm/oprofile/op_arm_model.h b/arch/arm/oprofile/op_arm_model.h
index 8c4e4f6..db936da 100644
--- a/arch/arm/oprofile/op_arm_model.h
+++ b/arch/arm/oprofile/op_arm_model.h
@@ -24,6 +24,8 @@ struct op_arm_model_spec {
extern struct op_arm_model_spec op_xscale_spec;
#endif
+extern struct op_arm_model_spec op_omap_gptimer_spec;
+
extern struct op_arm_model_spec op_armv6_spec;
extern struct op_arm_model_spec op_mpcore_spec;
extern struct op_arm_model_spec op_armv7_spec;
diff --git a/arch/arm/oprofile/op_model_omap_gptimer.c b/arch/arm/oprofile/op_model_omap_gptimer.c
new file mode 100644
index 0000000..d67a291
--- /dev/null
+++ b/arch/arm/oprofile/op_model_omap_gptimer.c
@@ -0,0 +1,76 @@
+/**
+ * OMAP gptimer based event monitor driver for oprofile
+ *
+ * Copyright (C) 2009 Nokia Corporation
+ * Author: Siarhei Siamashka <siarhei.siamashka@xxxxxxxxx>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+
+#include <linux/types.h>
+#include <linux/oprofile.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+
+#include <mach/dmtimer.h>
+
+#include "op_counter.h"
+#include "op_arm_model.h"
+
+static struct omap_dm_timer *gptimer;
+
+static int gptimer_init(void)
+{
+ return 0;
+}
+
+static int gptimer_setup(void)
+{
+ return 0;
+}
+
+static irqreturn_t gptimer_interrupt(int irq, void *arg)
+{
+ omap_dm_timer_write_status(gptimer, OMAP_TIMER_INT_OVERFLOW);
+ oprofile_add_sample(get_irq_regs(), 0);
+ return IRQ_HANDLED;
+}
+
+static int gptimer_start(void)
+{
+ u32 count = counter_config[0].count;
+ gptimer = omap_dm_timer_request();
+ BUG_ON(gptimer == NULL);
+ omap_dm_timer_set_source(gptimer, OMAP_TIMER_SRC_32_KHZ);
+ if (request_irq(omap_dm_timer_get_irq(gptimer), gptimer_interrupt,
+ IRQF_DISABLED, "oprofile gptimer", NULL) != 0) {
+ printk(KERN_ERR "oprofile: unable to request gptimer IRQ\n");
+ return -1;
+ }
+
+ if (count < 1)
+ count = 1;
+
+ omap_dm_timer_set_load_start(gptimer, 1, 0xffffffff - count);
+ omap_dm_timer_set_int_enable(gptimer, OMAP_TIMER_INT_OVERFLOW);
+ return 0;
+}
+
+static void gptimer_stop(void)
+{
+ omap_dm_timer_set_int_enable(gptimer, 0);
+ free_irq(omap_dm_timer_get_irq(gptimer), NULL);
+ omap_dm_timer_free(gptimer);
+}
+
+struct op_arm_model_spec op_omap_gptimer_spec = {
+ .init = gptimer_init,
+ .num_counters = 1,
+ .setup_ctrs = gptimer_setup,
+ .start = gptimer_start,
+ .stop = gptimer_stop,
+ .name = "hrtimer",
+};
--
1.5.6.5
--
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