arm: imx: cx9020: move dram init into common place

Move dram_init(), dram_init_banksize() and get_effective_memsize() to
arch/arm/mach-imx/mx5/mx53_dram.c, where it can be reused by m53evk and
mx53loco.

Signed-off-by: Patrick Bruenn <p.bruenn@beckhoff.com>

2 files changed, 48 insertions, 0 deletions

diff --git a/arch/arm/mach-imx/mx5/Makefile b/arch/arm/mach-imx/mx5/Makefile
index d021842f68..368cfde98b 100644
--- a/arch/arm/mach-imx/mx5/Makefile
+++ b/arch/arm/mach-imx/mx5/Makefile
@@ -9,3 +9,6 @@
 
 obj-y := soc.o clock.o
 obj-y += lowlevel_init.o
+
+# common files for mx53 dram initialization
+obj-$(CONFIG_TARGET_MX53CX9020) += mx53_dram.o
diff --git a/arch/arm/mach-imx/mx5/mx53_dram.c b/arch/arm/mach-imx/mx5/mx53_dram.c
new file mode 100644
index 0000000000..7e5fc42d1f
--- /dev/null
+++ b/arch/arm/mach-imx/mx5/mx53_dram.c
@@ -0,0 +1,45 @@
+/*
+ * Copyright (C) 2017  Beckhoff Automation GmbH & Co. KG
+ * Patrick Bruenn <p.bruenn@beckhoff.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+phys_size_t get_effective_memsize(void)
+{
+	/*
+	 * WARNING: We must override get_effective_memsize() function here
+	 * to report only the size of the first DRAM bank. This is to make
+	 * U-Boot relocator place U-Boot into valid memory, that is, at the
+	 * end of the first DRAM bank. If we did not override this function
+	 * like so, U-Boot would be placed at the address of the first DRAM
+	 * bank + total DRAM size - sizeof(uboot), which in the setup where
+	 * each DRAM bank contains 512MiB of DRAM would result in placing
+	 * U-Boot into invalid memory area close to the end of the first
+	 * DRAM bank.
+	 */
+	return get_ram_size((void *)PHYS_SDRAM_1, 1 << 30);
+}
+
+int dram_init(void)
+{
+	gd->ram_size = get_ram_size((void *)PHYS_SDRAM_1, 1 << 30);
+	gd->ram_size += get_ram_size((void *)PHYS_SDRAM_2, 1 << 30);
+
+	return 0;
+}
+
+int dram_init_banksize(void)
+{
+	gd->bd->bi_dram[0].start = PHYS_SDRAM_1;
+	gd->bd->bi_dram[0].size = get_ram_size((void *)PHYS_SDRAM_1, 1 << 30);
+
+	gd->bd->bi_dram[1].start = PHYS_SDRAM_2;
+	gd->bd->bi_dram[1].size = get_ram_size((void *)PHYS_SDRAM_2, 1 << 30);
+
+	return 0;
+}