microblaze: Core oprofile configs and hooks

Microblaze uses timer interrupt mode. Microblaze don't have
any performance counter that's why we use just simple implementation.

Signed-off-by: John Williams <[e-mail]>
Signed-off-by: Michal Simek <[e-mail]>

arch/microblaze/Kconfig

···
 	select HAVE_FTRACE_MCOUNT_RECORD
 	select USB_ARCH_HAS_EHCI
 	select ARCH_WANT_OPTIONAL_GPIOLIB
+	select HAVE_OPROFILE
+	select TRACING_SUPPORT
 
 config SWAP
 	def_bool n

arch/microblaze/Makefile

···
 core-y += arch/microblaze/mm/
 core-y += arch/microblaze/platform/
 
+drivers-$(CONFIG_OPROFILE) += arch/microblaze/oprofile/
+
 boot := arch/microblaze/boot
 
 # Are we making a simpleImage.<boardname> target? If so, crack out the boardname

arch/microblaze/oprofile/Makefile

···
+#
+# arch/microblaze/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) microblaze_oprofile.o

arch/microblaze/oprofile/microblaze_oprofile.c

···
+/*
+ * Microblaze oprofile code
+ *
+ * Copyright (C) 2009 Michal Simek <[e-mail]>
+ * Copyright (C) 2009 PetaLogix
+ *
+ * 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.
+ */
+
+#include <linux/oprofile.h>
+#include <linux/init.h>
+
+int __init oprofile_arch_init(struct oprofile_operations *ops)
+{
+	return -1;
+}
+
+void oprofile_arch_exit(void)
+{
+}