File-copy from v4.4.100
This is the result of 'cp' from a linux-stable tree with the 'v4.4.100'
tag checked out (commit 26d6298789e695c9f627ce49a7bbd2286405798a) on
git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Please refer to that tree for all history prior to this point.
Change-Id: I8a9ee2aea93cd29c52c847d0ce33091a73ae6afe
diff --git a/arch/sparc/oprofile/Makefile b/arch/sparc/oprofile/Makefile
new file mode 100644
index 0000000..e9feca1
--- /dev/null
+++ b/arch/sparc/oprofile/Makefile
@@ -0,0 +1,9 @@
+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
diff --git a/arch/sparc/oprofile/init.c b/arch/sparc/oprofile/init.c
new file mode 100644
index 0000000..f9024bc
--- /dev/null
+++ b/arch/sparc/oprofile/init.c
@@ -0,0 +1,87 @@
+/**
+ * @file init.c
+ *
+ * @remark Copyright 2002 OProfile authors
+ * @remark Read the file COPYING
+ *
+ * @author John Levon <levon@movementarian.org>
+ */
+
+#include <linux/kernel.h>
+#include <linux/oprofile.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/param.h> /* for HZ */
+
+#ifdef CONFIG_SPARC64
+#include <linux/notifier.h>
+#include <linux/rcupdate.h>
+#include <linux/kdebug.h>
+#include <asm/nmi.h>
+
+static int profile_timer_exceptions_notify(struct notifier_block *self,
+ unsigned long val, void *data)
+{
+ struct die_args *args = data;
+ int ret = NOTIFY_DONE;
+
+ switch (val) {
+ case DIE_NMI:
+ oprofile_add_sample(args->regs, 0);
+ ret = NOTIFY_STOP;
+ break;
+ default:
+ break;
+ }
+ return ret;
+}
+
+static struct notifier_block profile_timer_exceptions_nb = {
+ .notifier_call = profile_timer_exceptions_notify,
+};
+
+static int timer_start(void)
+{
+ if (register_die_notifier(&profile_timer_exceptions_nb))
+ return 1;
+ nmi_adjust_hz(HZ);
+ return 0;
+}
+
+
+static void timer_stop(void)
+{
+ nmi_adjust_hz(1);
+ unregister_die_notifier(&profile_timer_exceptions_nb);
+ synchronize_sched(); /* Allow already-started NMIs to complete. */
+}
+
+static int op_nmi_timer_init(struct oprofile_operations *ops)
+{
+ if (atomic_read(&nmi_active) <= 0)
+ return -ENODEV;
+
+ ops->start = timer_start;
+ ops->stop = timer_stop;
+ ops->cpu_type = "timer";
+ printk(KERN_INFO "oprofile: Using perfctr NMI timer interrupt.\n");
+ return 0;
+}
+#endif
+
+int __init oprofile_arch_init(struct oprofile_operations *ops)
+{
+ int ret = -ENODEV;
+
+#ifdef CONFIG_SPARC64
+ ret = op_nmi_timer_init(ops);
+ if (!ret)
+ return ret;
+#endif
+
+ return ret;
+}
+
+void oprofile_arch_exit(void)
+{
+}