[U-Boot] changing bootcmd environment
Dear All,
I am using u-boot given by our Samsung based s3c2416 board vendor which support SD CARD based boot,I am trying to change the boot command variable adding few more steps to it from the serial console. The problem is I am not able to add all the steps to the bootcmd variable into the environment,it is truncated midway.so can any one share your valuable experience in fixing this issue.
I am trying the below command..
setenv bootcmd "sleep 1;nand scrub ;sleep 1;nand erase;sleep 1;movi read 3800000# 40000 c0000000 ;sleep 1;nand write c0000000 0 40000;sleep 1;movi read kernel c0000000;sleep 1;nand write c0000000 40000 200000;sleep 1;movi read 3600000# 3800000 c0000000 ;sleep 1; nand write.yaffs c0000000 400000 35db4c0; sleep1; movi read 3600000# 3800000 c0000000; nand write.yaffs c0000000 6000000 35db4c0"
Thanks in Advance, Ratheendran
Hi Ratheendran,
Can you tell us how much u-boot can store? Every time truncated at same location?
Send me stored string .
Regards, Ramesh
-----Original Message----- From: u-boot-bounces@lists.denx.de [mailto:u-boot-bounces@lists.denx.de] On Behalf Of Ratheendran R Sent: Tuesday, February 05, 2013 10:25 AM To: u-boot@lists.denx.de Subject: [U-Boot] changing bootcmd environment
Dear All,
I am using u-boot given by our Samsung based s3c2416 board vendor which support SD CARD based boot,I am trying to change the boot command variable adding few more steps to it from the serial console. The problem is I am not able to add all the steps to the bootcmd variable into the environment,it is truncated midway.so can any one share your valuable experience in fixing this issue.
I am trying the below command..
setenv bootcmd "sleep 1;nand scrub ;sleep 1;nand erase;sleep 1;movi read 3800000# 40000 c0000000 ;sleep 1;nand write c0000000 0 40000;sleep 1;movi read kernel c0000000;sleep 1;nand write c0000000 40000 200000;sleep 1;movi read 3600000# 3800000 c0000000 ;sleep 1; nand write.yaffs c0000000 400000 35db4c0; sleep1; movi read 3600000# 3800000 c0000000; nand write.yaffs c0000000 6000000 35db4c0"
Thanks in Advance, Ratheendran
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On 02/04/2013 10:54:52 PM, Ratheendran R wrote:
Dear All,
I am using u-boot given by our Samsung based s3c2416 board vendor which support SD CARD based boot,I am trying to change the boot command variable adding few more steps to it from the serial console. The problem is I am not able to add all the steps to the bootcmd variable into the environment,it is truncated midway.so can any one share your valuable experience in fixing this issue.
I am trying the below command..
setenv bootcmd "sleep 1;nand scrub ;sleep 1;nand erase;sleep 1;movi read 3800000# 40000 c0000000 ;sleep 1;nand write c0000000 0 40000;sleep 1;movi read kernel c0000000;sleep 1;nand write c0000000 40000 200000;sleep 1;movi read 3600000# 3800000 c0000000 ;sleep 1; nand write.yaffs c0000000 400000 35db4c0; sleep1; movi read 3600000# 3800000 c0000000; nand write.yaffs c0000000 6000000 35db4c0"
Using "nand scrub" in this manner is totally wrong. Even without scrubbing, erasing and rewriting NAND on each boot is not a good idea.
It also indicates you're using an old U-Boot, as for a while now full-chip erase commands have to be written as "nand erase.chip". Plus I don't see a "movi" command in mainline U-Boot. Maybe you should be asking your board vendor for support?
Why do you need all those sleep commands? You could shorten your bootcmd quite a bit by removing them...
-Scott
Thanks Scott for your valuable feedback & suggestion.
I am using the board which is uses SD Card boot & NAND boot options,SD CARD boot is used to write firmware to be NAND flash and used only to update the firmware to NAND.
MOVI command may be added by the board vendor to support SD CARD boot,curently I am having to work around by updating the config file and recompiling the u-boot code.
Ratheendran
On Tue, Feb 5, 2013 at 11:10 PM, Scott Wood scottwood@freescale.com wrote:
On 02/04/2013 10:54:52 PM, Ratheendran R wrote:
Dear All,
I am using u-boot given by our Samsung based s3c2416 board vendor which support SD CARD based boot,I am trying to change the boot command variable adding few more steps to it from the serial console. The problem is I am not able to add all the steps to the bootcmd variable into the environment,it is truncated midway.so can any one share your valuable experience in fixing this issue.
I am trying the below command..
setenv bootcmd "sleep 1;nand scrub ;sleep 1;nand erase;sleep 1;movi read 3800000# 40000 c0000000 ;sleep 1;nand write c0000000 0 40000;sleep 1;movi read kernel c0000000;sleep 1;nand write c0000000 40000 200000;sleep 1;movi read 3600000# 3800000 c0000000 ;sleep 1; nand write.yaffs c0000000 400000 35db4c0; sleep1; movi read 3600000# 3800000 c0000000; nand write.yaffs c0000000 6000000 35db4c0"
Using "nand scrub" in this manner is totally wrong. Even without scrubbing, erasing and rewriting NAND on each boot is not a good idea.
It also indicates you're using an old U-Boot, as for a while now full-chip erase commands have to be written as "nand erase.chip". Plus I don't see a "movi" command in mainline U-Boot. Maybe you should be asking your board vendor for support?
Why do you need all those sleep commands? You could shorten your bootcmd quite a bit by removing them...
-Scott
On 02/05/2013 10:25:41 PM, Ratheendran R wrote:
Thanks Scott for your valuable feedback & suggestion.
I am using the board which is uses SD Card boot & NAND boot options,SD CARD boot is used to write firmware to be NAND flash and used only to update the firmware to NAND.
Every time you boot?
And you should never use "nand scrub" in an automated way.
-Scott
Thanks Scott
SD Card boot only to write firmware to NAND flash.
*'And you should never use "nand scrub" in an automated way.' * what is better way of doing this, since I am using with an old uboot..
-Ratheendran
On Thu, Feb 7, 2013 at 12:05 AM, Scott Wood scottwood@freescale.com wrote:
On 02/05/2013 10:25:41 PM, Ratheendran R wrote:
Thanks Scott for your valuable feedback & suggestion.
I am using the board which is uses SD Card boot & NAND boot options,SD CARD boot is used to write firmware to be NAND flash and used only to update the firmware to NAND.
Every time you boot?
And you should never use "nand scrub" in an automated way.
-Scott
On 02/07/2013 12:08:19 AM, Ratheendran R wrote:
Thanks Scott
SD Card boot only to write firmware to NAND flash.
*'And you should never use "nand scrub" in an automated way.'
what is better way of doing this, since I am using with an old uboot..
Just remove the scrub command and use normal erase.
-Scott
participants (3)
-
Ramesh K Khokhani -
Ratheendran R -
Scott Wood