EXYNOS: SMDK5250: Add MMC SPL support

This patch adds support for MMC SPL booting.

Signed-off-by: Chander Kashyap <chander.kashyap@linaro.org>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>

2 files changed, 65 insertions, 0 deletions

diff --git a/board/samsung/smdk5250/Makefile b/board/samsung/smdk5250/Makefile
index 80e8be3..226db1f 100644
--- a/board/samsung/smdk5250/Makefile
+++ b/board/samsung/smdk5250/Makefile
@@ -29,7 +29,14 @@ SOBJS	:= lowlevel_init.o
 COBJS	:= clock_init.o
 COBJS	+= dmc_init.o
 COBJS	+= tzpc_init.o
+
+ifndef CONFIG_SPL_BUILD
 COBJS	+= smdk5250.o
+endif
+
+ifdef CONFIG_SPL_BUILD
+COBJS	+= mmc_boot.o
+endif
 
 SRCS	:= $(SOBJS:.o=.S) $(COBJS:.o=.c)
 OBJS	:= $(addprefix $(obj),$(COBJS) $(SOBJS))
diff --git a/board/samsung/smdk5250/mmc_boot.c b/board/samsung/smdk5250/mmc_boot.c
new file mode 100644
index 0000000..449a919
--- /dev/null
+++ b/board/samsung/smdk5250/mmc_boot.c
@@ -0,0 +1,58 @@
+/*
+ * Copyright (C) 2012 Samsung Electronics
+ *
+ * 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>
+
+/*
+* Copy U-boot from mmc to RAM:
+* COPY_BL2_FNPTR_ADDR: Address in iRAM, which Contains
+* Pointer to API (Data transfer from mmc to ram)
+*/
+void copy_uboot_to_ram(void)
+{
+	u32 (*copy_bl2)(u32, u32, u32) = (void *) *(u32 *)COPY_BL2_FNPTR_ADDR;
+
+	copy_bl2(BL2_START_OFFSET, BL2_SIZE_BLOC_COUNT, CONFIG_SYS_TEXT_BASE);
+}
+
+void board_init_f(unsigned long bootflag)
+{
+	__attribute__((noreturn)) void (*uboot)(void);
+	copy_uboot_to_ram();
+
+	/* Jump to U-Boot image */
+	uboot = (void *)CONFIG_SYS_TEXT_BASE;
+	(*uboot)();
+	/* Never returns Here */
+}
+
+/* Place Holders */
+void board_init_r(gd_t *id, ulong dest_addr)
+{
+	/* Function attribute is no-return */
+	/* This Function never executes */
+	while (1)
+		;
+}
+
+void save_boot_params(u32 r0, u32 r1, u32 r2, u32 r3) {}