[PATCH] oprofile: ARM infrastructure

From: Philippe Elie <phil.el@wanadoo.fr>

From: Zwane Mwaikambo <zwane@arm.linux.org.uk>

This patch adds infrastructure code and enables ARM to utilise the timer
int oprofile driver.  There is PMU code under development for the XScale
but that is still forthcoming.  In the meantime you can use the timer int
driver with an updated Oprofile-CVS userspace (SF is a bit slow, please
allow 24hrs).

arch/arm/Kconfig

@@ -639,6 +639,8 @@ source "drivers/media/Kconfig"
 
 source "fs/Kconfig"
 
+source "arch/arm/oprofile/Kconfig"
+
 source "drivers/video/Kconfig"
 
 if ARCH_ACORN || ARCH_CLPS7500 || ARCH_TBOX || ARCH_SHARK || ARCH_SA1100 || PCI

arch/arm/Makefile

@@ -116,6 +116,7 @@ endif
 core-$(CONFIG_FPE_NWFPE)	+= arch/arm/nwfpe/
 core-$(CONFIG_FPE_FASTFPE)	+= $(FASTFPE_OBJ)
 
+drivers-$(CONFIG_OPROFILE)      += arch/arm/oprofile/
 drivers-$(CONFIG_ARCH_CLPS7500)	+= drivers/acorn/char/
 drivers-$(CONFIG_ARCH_L7200)	+= drivers/acorn/char/
 

arch/arm/kernel/time.c

@@ -85,6 +85,9 @@ unsigned long long __attribute__((weak)) sched_clock(void)
  */
 static inline void do_profile(struct pt_regs *regs)
 {
+
+	profile_hook(regs);
+
 	if (!user_mode(regs) &&
 	    prof_buffer &&
 	    current->pid) {

arch/arm/oprofile/Kconfig

+
+menu "Profiling support"
+	depends on EXPERIMENTAL
+
+config PROFILING
+	bool "Profiling support (EXPERIMENTAL)"
+	help
+	  Say Y here to enable the extended profiling support mechanisms used
+	  by profilers such as OProfile.
+
+
+config OPROFILE
+	tristate "OProfile system profiling (EXPERIMENTAL)"
+	depends on PROFILING
+	help
+	  OProfile is a profiling system capable of profiling the
+	  whole system, include the kernel, kernel modules, libraries,
+	  and applications.
+
+	  If unsure, say N.
+
+endmenu
+

arch/arm/oprofile/Makefile

+obj-$(CONFIG_OPROFILE) += oprofile.o
+
+DRIVER_OBJS = $(addprefix ../../../drivers/oprofile/, \
+		oprof.o cpu_buffer.o buffer_sync.o \
+		event_buffer.o oprofile_files.o \
+		oprofilefs.o oprofile_stats.o \
+		timer_int.o )
+
+oprofile-y				:= $(DRIVER_OBJS) init.o

arch/arm/oprofile/init.c

+/**
+ * @file init.c
+ *
+ * @remark Copyright 2004 Oprofile Authors
+ *
+ * @author Zwane Mwaikambo
+ */
+
+#include <linux/oprofile.h>
+#include <linux/init.h>
+#include <linux/errno.h>
+
+int oprofile_arch_init(struct oprofile_operations **ops)
+{
+	int ret = -ENODEV;
+
+	return ret;
+}
+
+void oprofile_arch_exit(void)
+{
+}

drivers/oprofile/timer_int.c

@@ -10,7 +10,6 @@
 #include <linux/kernel.h>
 #include <linux/notifier.h>
 #include <linux/smp.h>
-#include <linux/irq.h>
 #include <linux/oprofile.h>
 #include <linux/profile.h>
 #include <linux/init.h>