EXYNOS: Move files from board/samsung to arch/arm

This patch performs the following:

1) Convert the assembly code for memory and clock initialization to C code.
2) Move the memory and clock init codes from board/samsung to arch/arm
3) Creat a common lowlevel_init file across Exynos4 and Exynos5. Converted
   the common lowlevel_init from assembly to C-code
4) Made spl_boot.c and tzpc_init.c common for both exynos4 and exynos5.
5) Enable CONFIG_SKIP_LOWLEVEL_INIT as stack pointer initialisation is already
   done in _main.
6) exynos-uboot-spl.lds made common across SMDKV310, Origen and SMDK5250.

TEST: Tested SD-MMC boot on SMDK5250 and Origen.
      Tested USB and SPI boot on SMDK5250
      Compile tested for SMDKV310.

Signed-off-by: Rajeshwari Shinde <rajeshwari.s@samsung.com>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>

1 files changed, 73 insertions, 0 deletions

diff --git a/arch/arm/cpu/armv7/exynos/lowlevel_init.c b/arch/arm/cpu/armv7/exynos/lowlevel_init.c
new file mode 100644
index 0000000000..11fe5b8d04
--- /dev/null
+++ b/arch/arm/cpu/armv7/exynos/lowlevel_init.c
@@ -0,0 +1,73 @@
+/*
+ * Lowlevel setup for EXYNOS5 based board
+ *
+ * Copyright (C) 2013 Samsung Electronics
+ * Rajeshwari Shinde <rajeshwari.s@samsung.com>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <config.h>
+#include <asm/arch/cpu.h>
+#include <asm/arch/dmc.h>
+#include <asm/arch/power.h>
+#include <asm/arch/tzpc.h>
+#include <asm/arch/periph.h>
+#include <asm/arch/pinmux.h>
+#include "common_setup.h"
+
+/* These are the things we can do during low-level init */
+enum {
+	DO_WAKEUP	= 1 << 0,
+	DO_CLOCKS	= 1 << 1,
+	DO_MEM_RESET	= 1 << 2,
+	DO_UART		= 1 << 3,
+};
+
+int do_lowlevel_init(void)
+{
+	uint32_t reset_status;
+	int actions = 0;
+
+	arch_cpu_init();
+
+	reset_status = get_reset_status();
+
+	switch (reset_status) {
+	case S5P_CHECK_SLEEP:
+		actions = DO_CLOCKS | DO_WAKEUP;
+		break;
+	case S5P_CHECK_DIDLE:
+	case S5P_CHECK_LPA:
+		actions = DO_WAKEUP;
+		break;
+	default:
+		/* This is a normal boot (not a wake from sleep) */
+		actions = DO_CLOCKS | DO_MEM_RESET;
+	}
+
+	if (actions & DO_CLOCKS) {
+		system_clock_init();
+		mem_ctrl_init(actions & DO_MEM_RESET);
+		tzpc_init();
+	}
+
+	return actions & DO_WAKEUP;
+}