plat: renesas: Move headers and assembly files to common folder

Create a common directory and move the header and assembly files
so that the common code can be used by both Renesas R-Car Gen3 and
RZ/G2 platforms.

Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Change-Id: Ia9a563a1c3c9f8c6f0d3cb82622deb2e155d7f6c

1 files changed, 37 insertions, 0 deletions

diff --git a/drivers/renesas/common/common.c b/drivers/renesas/common/common.c
new file mode 100644
index 000000000..9b7c1eb16
--- /dev/null
+++ b/drivers/renesas/common/common.c
@@ -0,0 +1,37 @@
+/*
+ * Copyright (c) 2018-2020, Renesas Electronics Corporation. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <lib/mmio.h>
+
+#include "rcar_private.h"
+
+#if IMAGE_BL31
+void __attribute__ ((section(".system_ram"))) cpg_write(uintptr_t regadr, uint32_t regval)
+#else
+void cpg_write(uintptr_t regadr, uint32_t regval)
+#endif
+{
+	uint32_t value = regval;
+
+	mmio_write_32((uintptr_t) RCAR_CPGWPR, ~value);
+	mmio_write_32(regadr, value);
+}
+
+#if IMAGE_BL31
+void __attribute__ ((section(".system_ram"))) mstpcr_write(uint32_t mstpcr, uint32_t mstpsr,
+							   uint32_t target_bit)
+#else
+void mstpcr_write(uint32_t mstpcr, uint32_t mstpsr, uint32_t target_bit)
+#endif
+{
+	uint32_t reg;
+
+	reg = mmio_read_32(mstpcr);
+	reg &= ~target_bit;
+	cpg_write(mstpcr, reg);
+	while ((mmio_read_32(mstpsr) & target_bit) != 0U) {
+	}
+}