Add the implementation of OF_decode_addr().

1 files changed, 58 insertions, 0 deletions

diff --git a/sys/riscv/riscv/ofw_machdep.c b/sys/riscv/riscv/ofw_machdep.c
new file mode 100644
index 0000000..3941c1d
--- /dev/null
+++ b/sys/riscv/riscv/ofw_machdep.c
@@ -0,0 +1,58 @@
+/*-
+ * Copyright (c) 2015 Ian Lepore <ian@freebsd.org>
+ * All rights reserved.
+ *
+ * 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/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <sys/bus.h>
+
+#include <machine/bus.h>
+
+#include <dev/ofw/openfirm.h>
+#include <dev/ofw/ofw_subr.h>
+
+extern struct bus_space memmap_bus;
+
+int
+OF_decode_addr(phandle_t dev, int regno, bus_space_tag_t *tag,
+    bus_space_handle_t *handle, bus_size_t *sz)
+{
+	bus_addr_t addr;
+	bus_size_t size;
+	int err;
+
+	err = ofw_reg_to_paddr(dev, regno, &addr, &size, NULL);
+	if (err != 0)
+		return (err);
+
+	*tag = &memmap_bus;
+
+	if (sz != NULL)
+		*sz = size;
+
+	return (bus_space_map(*tag, addr, size, 0, handle));
+}