v4.19.13 snapshot.
diff --git a/arch/mips/oprofile/common.c b/arch/mips/oprofile/common.c
new file mode 100644
index 0000000..2f33992
--- /dev/null
+++ b/arch/mips/oprofile/common.c
@@ -0,0 +1,147 @@
+/*
+ * 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.
+ *
+ * Copyright (C) 2004, 2005 Ralf Baechle
+ * Copyright (C) 2005 MIPS Technologies, Inc.
+ */
+#include <linux/compiler.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/oprofile.h>
+#include <linux/smp.h>
+#include <asm/cpu-info.h>
+#include <asm/cpu-type.h>
+
+#include "op_impl.h"
+
+extern struct op_mips_model op_model_mipsxx_ops __weak;
+extern struct op_mips_model op_model_loongson2_ops __weak;
+extern struct op_mips_model op_model_loongson3_ops __weak;
+
+static struct op_mips_model *model;
+
+static struct op_counter_config ctr[20];
+
+static int op_mips_setup(void)
+{
+ /* Pre-compute the values to stuff in the hardware registers. */
+ model->reg_setup(ctr);
+
+ /* Configure the registers on all cpus. */
+ on_each_cpu(model->cpu_setup, NULL, 1);
+
+ return 0;
+}
+
+static int op_mips_create_files(struct dentry *root)
+{
+ int i;
+
+ for (i = 0; i < model->num_counters; ++i) {
+ struct dentry *dir;
+ char buf[4];
+
+ snprintf(buf, sizeof buf, "%d", i);
+ dir = oprofilefs_mkdir(root, buf);
+
+ oprofilefs_create_ulong(dir, "enabled", &ctr[i].enabled);
+ oprofilefs_create_ulong(dir, "event", &ctr[i].event);
+ oprofilefs_create_ulong(dir, "count", &ctr[i].count);
+ oprofilefs_create_ulong(dir, "kernel", &ctr[i].kernel);
+ oprofilefs_create_ulong(dir, "user", &ctr[i].user);
+ oprofilefs_create_ulong(dir, "exl", &ctr[i].exl);
+ /* Dummy. */
+ oprofilefs_create_ulong(dir, "unit_mask", &ctr[i].unit_mask);
+ }
+
+ return 0;
+}
+
+static int op_mips_start(void)
+{
+ on_each_cpu(model->cpu_start, NULL, 1);
+
+ return 0;
+}
+
+static void op_mips_stop(void)
+{
+ /* Disable performance monitoring for all counters. */
+ on_each_cpu(model->cpu_stop, NULL, 1);
+}
+
+int __init oprofile_arch_init(struct oprofile_operations *ops)
+{
+ struct op_mips_model *lmodel = NULL;
+ int res;
+
+ switch (boot_cpu_type()) {
+ case CPU_5KC:
+ case CPU_M14KC:
+ case CPU_M14KEC:
+ case CPU_20KC:
+ case CPU_24K:
+ case CPU_25KF:
+ case CPU_34K:
+ case CPU_1004K:
+ case CPU_74K:
+ case CPU_1074K:
+ case CPU_INTERAPTIV:
+ case CPU_PROAPTIV:
+ case CPU_P5600:
+ case CPU_I6400:
+ case CPU_M5150:
+ case CPU_LOONGSON1:
+ case CPU_SB1:
+ case CPU_SB1A:
+ case CPU_R10000:
+ case CPU_R12000:
+ case CPU_R14000:
+ case CPU_R16000:
+ case CPU_XLR:
+ lmodel = &op_model_mipsxx_ops;
+ break;
+
+ case CPU_LOONGSON2:
+ lmodel = &op_model_loongson2_ops;
+ break;
+ case CPU_LOONGSON3:
+ lmodel = &op_model_loongson3_ops;
+ break;
+ };
+
+ /*
+ * Always set the backtrace. This allows unsupported CPU types to still
+ * use timer-based oprofile.
+ */
+ ops->backtrace = op_mips_backtrace;
+
+ if (!lmodel)
+ return -ENODEV;
+
+ res = lmodel->init();
+ if (res)
+ return res;
+
+ model = lmodel;
+
+ ops->create_files = op_mips_create_files;
+ ops->setup = op_mips_setup;
+ //ops->shutdown = op_mips_shutdown;
+ ops->start = op_mips_start;
+ ops->stop = op_mips_stop;
+ ops->cpu_type = lmodel->cpu_type;
+
+ printk(KERN_INFO "oprofile: using %s performance monitoring.\n",
+ lmodel->cpu_type);
+
+ return 0;
+}
+
+void oprofile_arch_exit(void)
+{
+ if (model)
+ model->exit();
+}