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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>
This commit is contained in:
Nobuhiro Iwamatsu 2010-12-08 13:49:12 +09:00 committed by Nobuhiro Iwamatsu
parent 9980df5616
commit 45ce6f9e35
2 changed files with 83 additions and 0 deletions
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3
arch/sh/lib/Makefile
View File

@ -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))

80
arch/sh/lib/zimageboot.c Normal file
View File

@ -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",
""
);