[U-Boot-Users] Loading a kernel on MX31ADS using U-boot

[Fabio Estevam]

Hi Guennadi,

I tried to load the kernel at 0x80800000, but this is
what I get:
Hit any key to stop autoboot:  0
=> run bootargs_base bootargs_nfs
=> tftp 80800000 uImage
TFTP from server 10.29.244.101; our IP address is
10.29.244.102
Filename 'uImage'.
Load address: 0x80800000
Loading:
#################################################################
         ###########################
done
Bytes transferred = 1339152 (146f10 hex)
=> bootm
## Booting image at 80800000 ...
   Image Name:   Linux-2.6.22
   Image Type:   ARM Linux Kernel Image (uncompressed)
   Data Size:    1339088 Bytes =  1.3 MB
   Load Address: 80008000
   Entry Point:  80008000
   Verifying Checksum ... OK
OK

Starting kernel ...

Uncompressing
Linux.............................................................
................................... done, booting the
kernel.
(then it freezes)
  
I generated uImage manually by doing:
./mkimage -A arm -O linux -T kernel -C none -a
0x80008000 -e 0x80008000 -n 'Linux-2.6.22' -d zImage
uImage

Used 0x80008000 to match the value of ZRELADDR in
/arch/arm/mach-mx3/Makefile.boot from Freescale Linux
BSP.

Any suggestions?

Thanks,

Fabio Estevam

--- Guennadi Liakhovetski <g.liakhovetski at gmx.de>
wrote:

> On Fri, 11 Apr 2008, Fabio Estevam wrote:
> 
> > I am using U-boot 1.3.2 with the MX31ADS patches
> > posted by Guennadi Liakhovetski.
> > 
> > I would like to load the zImage kernel from
> Freescale
> > Linux BSP via TFTP and mount the rootfs via NFS.
> 
> You nead a uImage. Just use the same kernel sources
> and do make uImage 
> instead of zImage.
> 
> > Does anyone have an example for doing this? I am
> not
> > sure what address should I use to load the kernel
> into
> > RAM.
> 
> Load it to 0x80800000. You can also try the patch
> below, which will give 
> you a better default environment, it shall be
> submitted to the list soon.
> 
> Thanks
> Guennadi
> ---
> Guennadi Liakhovetski
> 
> [PATCH] mx31ads: Fix default environment
> 
> Fix wrong load address in RAM, undefined environment
> variables,
> make the default environment more usable.
> 
> Signed-off-by: Guennadi Liakhovetski <lg at denx.de>
> ---
>  include/configs/mx31ads.h |   25
> ++++++++++++++++++-------
>  1 files changed, 18 insertions(+), 7 deletions(-)
> 
> diff --git a/include/configs/mx31ads.h
> b/include/configs/mx31ads.h
> index 78e2545..3ad3883 100644
> --- a/include/configs/mx31ads.h
> +++ b/include/configs/mx31ads.h
> @@ -80,13 +80,24 @@
>  #define CONFIG_IPADDR		192.168.23.168
>  #define CONFIG_SERVERIP		192.168.23.2
>  
> -#define	CONFIG_EXTRA_ENV_SETTINGS											\
> -	"bootargs_base=setenv bootargs
> console=ttymxc0,115200\0"							\
> -	"bootargs_nfs=setenv bootargs $(bootargs)
> root=/dev/nfs ip=dhcp
> nfsroot=$(serverip):$(nfsrootfs),v3,tcp\0"	\
> -	"bootcmd=run bootcmd_net\0"											\
> -	"bootcmd_net=run bootargs_base bootargs_mtd
> bootargs_nfs; tftpboot 0x80000000 uImage-mx31;
> bootm\0"		\
> -	"prg_uboot=tftpboot 0x80000000 u-boot-mx31ads.bin;
> protect off 0xa0000000 0xa001ffff; erase 0xa0000000
> 0xa001ffff; cp.b 0x80000000 0xa0000000
> $(filesize)\0"
> -
> +#define	CONFIG_EXTRA_ENV_SETTINGS					\
> +	"netdev=eth0\0"							\
> +	"load_addr=0x80800000\0"					\
> +	"uboot_addr=0xa0000000\0"					\
> +	"uboot=mx31ads/u-boot.bin\0"					\
> +	"kernel=mx31ads/uImage\0"					\
> +	"nfsroot=/opt/eldk/arm\0"					\
> +	"bootargs_base=setenv bootargs
> console=ttymxc0,115200\0"	\
> +	"bootargs_nfs=setenv bootargs ${bootargs}
> root=/dev/nfs "	\
> +		"ip=dhcp nfsroot=${serverip}:${nfsroot},v3,tcp\0"
> \
> +	"bootcmd=run bootcmd_net\0"					\
> +	"bootcmd_net=run bootargs_base bootargs_nfs; "			\
> +		"tftpboot ${load_addr} ${kernel}; bootm\0"		\
> +	"prg_uboot=tftpboot ${load_addr} ${uboot}; "			\
> +		"protect off ${uboot_addr} 0xa003ffff; "		\
> +		"erase ${uboot_addr} 0xa003ffff; "			\
> +		"cp.b ${load_addr} ${uboot_addr} ${filesize}; "	
> \
> +		"setenv filesize; saveenv\0"
>  
>  #define CONFIG_DRIVER_CS8900	1
>  #define CS8900_BASE		0xb4020300
> -- 
> 1.5.4
> 
> 


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