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authorNobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>2010-12-08 13:49:12 +0900
committerNobuhiro Iwamatsu <iwamatsu@nigauri.org>2011-01-11 21:03:26 +0900
commit45ce6f9e35663ea69fcb268e18e9e7f9fda4881d (patch)
treeed6c0b5b6dc68a77aaccb4fec6b3b25e4a12ed59 /arch/sh
parent9980df5616a1561460ea079451db1b57c96131f5 (diff)
sh: Add support zimageboot command for Renesas SH
Curent U-Boot can boot zImage by use the "go" command. But this is not right method. And this method can not set command-line to linux kernel. zimageboot sets command-line in environment of u-boot in linux kernel, and provides function to boot it. Signed-off-by: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
Diffstat (limited to 'arch/sh')
-rw-r--r--arch/sh/lib/Makefile3
-rw-r--r--arch/sh/lib/zimageboot.c80
2 files changed, 83 insertions, 0 deletions
diff --git a/arch/sh/lib/Makefile b/arch/sh/lib/Makefile
index 7f6039699da..c0670cbc88c 100644
--- a/arch/sh/lib/Makefile
+++ b/arch/sh/lib/Makefile
@@ -31,6 +31,9 @@ COBJS-y += time_sh2.o
else
COBJS-y += time.o
endif
+ifeq ($(CONFIG_CMD_SH_ZIMAGEBOOT),y)
+COBJS-y += zimageboot.o
+endif
SRCS := $(SOBJS-y:.o=.S) $(COBJS-y:.o=.c)
OBJS := $(addprefix $(obj),$(SOBJS-y) $(COBJS-y))
diff --git a/arch/sh/lib/zimageboot.c b/arch/sh/lib/zimageboot.c
new file mode 100644
index 00000000000..dd413c0f7fa
--- /dev/null
+++ b/arch/sh/lib/zimageboot.c
@@ -0,0 +1,80 @@
+/*
+ * (C) Copyright 2010
+ * Renesas Solutions Corp.
+ * Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.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
+ */
+
+/*
+ * Linux SuperH zImage loading and boot
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <asm/zimage.h>
+
+int do_sh_zimageboot (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
+{
+ ulong (*zboot_entry)(int, char * const []) = NULL;
+ char *s0, *s1;
+ unsigned char *param = NULL;
+ char *cmdline;
+ char *bootargs;
+
+ disable_interrupts();
+
+ if (argc >= 3) {
+ /* argv[1] holds the address of the zImage */
+ s0 = argv[1];
+ /* argv[2] holds the address of zero page */
+ s1 = argv[2];
+ } else {
+ goto exit;
+ }
+
+ if (s0)
+ zboot_entry = (ulong (*)(int, char * const []))simple_strtoul(s0, NULL, 16);
+
+ /* empty_zero_page */
+ if (s1)
+ param = (unsigned char*)simple_strtoul(s1, NULL, 16);
+
+ /* Linux kernel command line */
+ cmdline = (char *)param + COMMAND_LINE;
+ bootargs = getenv("bootargs");
+
+ /* Clear zero page */
+ memset(param, 0, 0x1000);
+
+ /* Set commandline */
+ strcpy(cmdline, bootargs);
+
+ /* Boot */
+ zboot_entry(0, NULL);
+
+exit:
+ return -1;
+}
+
+U_BOOT_CMD(
+ zimageboot, 3, 0, do_sh_zimageboot,
+ "Boot zImage for Renesas SH",
+ ""
+);