ARM: renesas: Factor out DRAM setup on R-Car Gen3

Pull DRAM layout configuration code into rcar-common.c instead of
having it in multiple copies across board files. This poses no
change for Salvator-X/XS, ULCB and Ebisu boards, however it adds
a bit of extra code for Draak and Eagle boards, which now gain
the capability of being passed in the DRAM layout by the ATF.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Eugeniu Rosca <roscaeugeniu@gmail.com>
Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>

1 files changed, 38 insertions, 0 deletions

diff --git a/board/renesas/rcar-common/common.c b/board/renesas/rcar-common/common.c
index 1ce6e2eac1..292867e496 100644
--- a/board/renesas/rcar-common/common.c
+++ b/board/renesas/rcar-common/common.c
@@ -9,3 +9,41 @@
 
 #include <common.h>
 #include <asm/arch/rmobile.h>
+
+#ifdef CONFIG_RCAR_GEN3
+
+DECLARE_GLOBAL_DATA_PTR;
+
+/* If the firmware passed a device tree use it for U-Boot DRAM setup. */
+extern u64 rcar_atf_boot_args[];
+
+int dram_init(void)
+{
+	const void *atf_fdt_blob = (const void *)(rcar_atf_boot_args[1]);
+	const void *blob;
+
+	/* Check if ATF passed us DTB. If not, fall back to builtin DTB. */
+	if (fdt_magic(atf_fdt_blob) == FDT_MAGIC)
+		blob = atf_fdt_blob;
+	else
+		blob = gd->fdt_blob;
+
+	return fdtdec_setup_mem_size_base_fdt(blob);
+}
+
+int dram_init_banksize(void)
+{
+	const void *atf_fdt_blob = (const void *)(rcar_atf_boot_args[1]);
+	const void *blob;
+
+	/* Check if ATF passed us DTB. If not, fall back to builtin DTB. */
+	if (fdt_magic(atf_fdt_blob) == FDT_MAGIC)
+		blob = atf_fdt_blob;
+	else
+		blob = gd->fdt_blob;
+
+	fdtdec_setup_memory_banksize_fdt(blob);
+
+	return 0;
+}
+#endif