sh: First support code of SuperH.

Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>

1 files changed, 74 insertions, 0 deletions

diff --git a/lib_sh/sh_linux.c b/lib_sh/sh_linux.c
new file mode 100644
index 0000000..7237ab3
--- /dev/null
+++ b/lib_sh/sh_linux.c
@@ -0,0 +1,74 @@
+/*
+ * (C) Copyright 2003
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * 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 <command.h>
+#include <asm/byteorder.h>
+
+extern image_header_t header;	/* common/cmd_bootm.c */
+
+/* The SH kernel reads arguments from the empty zero page at location
+ * 0 at the start of SDRAM. The following are copied from 
+ * arch/sh/kernel/setup.c and may require tweaking if the kernel sources
+ * change.
+ */
+#define PARAM   ((unsigned char *)CFG_SDRAM_BASE + 0x1000)
+
+#define MOUNT_ROOT_RDONLY (*(unsigned long *) (PARAM+0x000))
+#define RAMDISK_FLAGS (*(unsigned long *) (PARAM+0x004))
+#define ORIG_ROOT_DEV (*(unsigned long *) (PARAM+0x008))
+#define LOADER_TYPE (*(unsigned long *) (PARAM+0x00c))
+#define INITRD_START (*(unsigned long *) (PARAM+0x010))
+#define INITRD_SIZE (*(unsigned long *) (PARAM+0x014))
+/* ... */
+#define COMMAND_LINE ((char *) (PARAM+0x100))
+
+#define RAMDISK_IMAGE_START_MASK        0x07FF
+
+#ifdef CFG_DEBUG
+static void hexdump (unsigned char *buf, int len)
+{
+	int i;
+
+	for (i = 0; i < len; i++) {
+		if ((i % 16) == 0)
+			printf ("%s%08x: ", i ? "\n" : "", (unsigned int) &buf[i]);
+		printf ("%02x ", buf[i]);
+	}
+	printf ("\n");
+}
+#endif
+
+void do_bootm_linux (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
+		     ulong addr, ulong *len_ptr, int verify)
+{
+	image_header_t *hdr = &header;
+	char *bootargs = getenv("bootargs");
+	void (*kernel) (void) = (void (*)(void)) ntohl (hdr->ih_ep);
+
+	/* Setup parameters */
+	memset(PARAM, 0, 0x1000);	/* Clear zero page */
+	strcpy(COMMAND_LINE, bootargs);
+	kernel();
+}
+