OneNAND Initial Program Loader (IPL) support

This patch enables the OneNAND boot within U-Boot.
Before this work, we used another OneNAND IPL called X-Loader based
on open source. With this work, we can build the oneboot.bin image
without other program.

The build sequence is simple.
First, it compiles the u-boot.bin
Second, it compiles OneNAND IPL
Finally, it becomes the oneboot.bin from OneNAND IPL and u-boot.bin
The mechanism is similar with NAND boot except it boots from itself.

Another thing is that you can only use the OneNAND IPL only to work
other bootloader such as RedBoot and so on.

Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>

1 files changed, 81 insertions, 0 deletions

diff --git a/onenand_ipl/onenand_boot.c b/onenand_ipl/onenand_boot.c
new file mode 100644
index 0000000..f30deae
--- /dev/null
+++ b/onenand_ipl/onenand_boot.c
@@ -0,0 +1,81 @@
+/*
+ * (C) Copyright 2005-2008 Samsung Electronics
+ * Kyungmin Park <kyungmin.park@samsung.com>
+ *
+ * Derived from x-loader
+ *
+ * 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 <version.h>
+
+#include "onenand_ipl.h"
+
+#ifdef CFG_PRINTF
+int print_info(void)
+{
+	printf(XLOADER_VERSION);
+
+	return 0;
+}
+#endif
+
+typedef int (init_fnc_t)(void);
+
+init_fnc_t *init_sequence[] = {
+	board_init,		/* basic board dependent setup */
+#ifdef CFG_PRINTF
+	serial_init,		/* serial communications setup */
+	print_info,
+#endif
+	NULL,
+};
+
+void start_oneboot(void)
+{
+	init_fnc_t **init_fnc_ptr;
+	uchar *buf;
+
+	for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) {
+		if ((*init_fnc_ptr)() != 0)
+			hang();
+	}
+
+	buf = (uchar *) CFG_LOAD_ADDR;
+
+	if (!onenand_read_block(buf, ONENAND_START_BLOCK))
+		buf += ONENAND_BLOCK_SIZE;
+
+	if (buf == (uchar *)CFG_LOAD_ADDR)
+		hang();
+
+	/* go run U-Boot and never return */
+	printf("Starting OS Bootloader...\n");
+	((init_fnc_t *)CFG_LOAD_ADDR)();
+
+	/* should never come here */
+}
+
+void hang(void)
+{
+	/* if board_hang() returns, hange here */
+	printf("X-Loader hangs\n");
+	for (;;);
+}