1 files changed, 38 insertions, 0 deletions
diff --git a/include/drivers/nxp/ddr/ddr_io.h b/include/drivers/nxp/ddr/ddr_io.h
new file mode 100644
index 0000000..fbd7e97
--- /dev/null
+++ b/include/drivers/nxp/ddr/ddr_io.h
@@ -0,0 +1,38 @@
+/*
+ * Copyright 2021 NXP
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ */
+
+#ifndef DDR_IO_H
+#define DDR_IO_H
+
+#include <endian.h>
+
+#include <lib/mmio.h>
+
+#define min(a, b)  (((a) > (b)) ? (b) : (a))
+
+#define max(a, b)  (((a) > (b)) ? (a) : (b))
+
+/* macro for memory barrier */
+#define mb()		asm volatile("dsb sy" : : : "memory")
+
+#ifdef NXP_DDR_BE
+#define ddr_in32(a)			bswap32(mmio_read_32((uintptr_t)(a)))
+#define ddr_out32(a, v)			mmio_write_32((uintptr_t)(a),\
+							bswap32(v))
+#elif defined(NXP_DDR_LE)
+#define ddr_in32(a)			mmio_read_32((uintptr_t)(a))
+#define ddr_out32(a, v)			mmio_write_32((uintptr_t)(a), v)
+#else
+#error Please define CCSR DDR register endianness
+#endif
+
+#define ddr_setbits32(a, v)		ddr_out32((a), ddr_in32(a) | (v))
+#define ddr_clrbits32(a, v)		ddr_out32((a), ddr_in32(a) & ~(v))
+#define ddr_clrsetbits32(a, c, s)	ddr_out32((a), (ddr_in32(a) & ~(c)) \
+						  | (s))
+
+#endif /*	DDR_IO_H	*/