1 files changed, 75 insertions, 0 deletions
diff --git a/sys/arm64/spe/arm_spe_fdt.c b/sys/arm64/spe/arm_spe_fdt.c
new file mode 100644
index 000000000000..d16f1dee2ac8
--- /dev/null
+++ b/sys/arm64/spe/arm_spe_fdt.c
@@ -0,0 +1,75 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
+ * Copyright (c) 2024 Arm Ltd
+ * Copyright (c) 2022 The FreeBSD Foundation
+ *
+ * Portions of this software were developed by Andrew Turner under sponsorship
+ * from the FreeBSD Foundation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/param.h>
+#include <sys/bus.h>
+#include <sys/kernel.h>
+#include <sys/lock.h>
+#include <sys/module.h>
+#include <sys/mutex.h>
+
+#include <dev/ofw/ofw_bus.h>
+#include <dev/ofw/ofw_bus_subr.h>
+#include <dev/ofw/openfirm.h>
+
+#include <arm64/spe/arm_spe_dev.h>
+
+static device_probe_t arm_spe_fdt_probe;
+
+static struct ofw_compat_data compat_data[] = {
+	{"arm,statistical-profiling-extension-v1",      true},
+	{NULL,                                          false},
+};
+
+static device_method_t arm_spe_fdt_methods[] = {
+	/* Device interface */
+	DEVMETHOD(device_probe,         arm_spe_fdt_probe),
+
+	DEVMETHOD_END,
+};
+
+DEFINE_CLASS_1(spe, arm_spe_fdt_driver, arm_spe_fdt_methods,
+    sizeof(struct arm_spe_softc), arm_spe_driver);
+
+DRIVER_MODULE(spe, simplebus, arm_spe_fdt_driver, 0, 0);
+
+static int
+arm_spe_fdt_probe(device_t dev)
+{
+	if (!ofw_bus_status_okay(dev))
+		return (ENXIO);
+
+	if (!ofw_bus_search_compatible(dev, compat_data)->ocd_data)
+		return (ENXIO);
+
+	device_set_desc(dev, "ARM Statistical Profiling Extension");
+	return (BUS_PROBE_DEFAULT);
+}