1 files changed, 41 insertions, 0 deletions
diff --git a/include/phys2bus.h b/include/phys2bus.h
new file mode 100644
index 00000000000..866b8b51a8c
--- /dev/null
+++ b/include/phys2bus.h
@@ -0,0 +1,41 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright 2015 Stephen Warren
+ */
+
+#ifndef _BUS_ADDR_H
+#define _BUS_ADDR_H
+
+#ifdef CONFIG_PHYS_TO_BUS
+unsigned long phys_to_bus(unsigned long phys);
+unsigned long bus_to_phys(unsigned long bus);
+#else
+static inline unsigned long phys_to_bus(unsigned long phys)
+{
+	return phys;
+}
+
+static inline unsigned long bus_to_phys(unsigned long bus)
+{
+	return bus;
+}
+#endif
+
+#if CONFIG_IS_ENABLED(DM)
+#include <dm/device.h>
+
+static inline dma_addr_t dev_phys_to_bus(struct udevice *dev, phys_addr_t phys)
+{
+	return phys - dev_get_dma_offset(dev);
+}
+
+static inline phys_addr_t dev_bus_to_phys(struct udevice *dev, dma_addr_t bus)
+{
+	return bus + dev_get_dma_offset(dev);
+}
+#else
+#define dev_phys_to_bus(_, _addr)	_addr
+#define dev_bus_to_phys(_, _addr)	_addr
+#endif
+
+#endif