[U-Boot] onenand bad block handling

[U-Boot] onenand bad block handling

[Geiger Ho]

Hi all,

  I am working on an ARM platform with OneNAND as the permanent storage 
for u-boot, Linux kernel and rootfs. I am using u-boot-2009.03 and linux 
kernel 2.6.27. I have some questions about the bad block handling of 
OneNAND.

  1. How does the u-boot handle bad block for onenand?
  2. If u-boot is creating a bad block table, does it need to pass to 
the kernel? If not, how to ensure their bad block table are in sync?
  3. How to deal with bad blocks after the writing of the u-boot, kernel 
and rootfs image? Is it the job of UBI?

  Thanks in advance.

Best regards,
Geiger

[U-Boot] onenand bad block handling

[Amit Kumar Sharma]

Hi,


> Hi all,
>
>  I am working on an ARM platform with OneNAND as the 
> permanent storage
> for u-boot, Linux kernel and rootfs. I am using 
> u-boot-2009.03 and linux
> kernel 2.6.27. I have some questions about the bad block 
> handling of
> OneNAND.
>
>  1. How does the u-boot handle bad block for onenand?
        Jsut skip the bad block and use only good bloks
>  2. If u-boot is creating a bad block table, does it need 
> to pass to
> the kernel? If not, how to ensure their bad block table 
> are in sync?
    no need to pass bad block from uboot, kernel will create 
table of bad blocks.
>  3. How to deal with bad blocks after the writing of the 
> u-boot, kernel
> and rootfs image? Is it the job of UBI?
        yes,  UBI will manage
>
>  Thanks in advance.
>
> Best regards,
> Geiger
> _______________________________________________
> U-Boot mailing list
> U-Boot at lists.denx.de
> http://lists.denx.de/mailman/listinfo/u-boot 

[U-Boot] onenand bad block handling

[Geiger Ho]

Hi Sharma-san,

  If I use u-boot to write kernel image to onenand that the kernel image 
across bad blocks, will u-boot able to skip blocks during read and 
successfully boot up the kernel?

  Also, same case for rootfs, if I write JFFS2 format rootfs to onenand 
using u-boot, how does the kernel handle the rootfs if rootfs across bad 
blocks?

  Many thanks.

Best regards,
Geiger

Amit Kumar Sharma wrote:
> Hi,
>
>
>   
>> Hi all,
>>
>>  I am working on an ARM platform with OneNAND as the 
>> permanent storage
>> for u-boot, Linux kernel and rootfs. I am using 
>> u-boot-2009.03 and linux
>> kernel 2.6.27. I have some questions about the bad block 
>> handling of
>> OneNAND.
>>
>>  1. How does the u-boot handle bad block for onenand?
>>     
>         Jsut skip the bad block and use only good bloks
>   
>>  2. If u-boot is creating a bad block table, does it need 
>> to pass to
>> the kernel? If not, how to ensure their bad block table 
>> are in sync?
>>     
>     no need to pass bad block from uboot, kernel will create 
> table of bad blocks.
>   
>>  3. How to deal with bad blocks after the writing of the 
>> u-boot, kernel
>> and rootfs image? Is it the job of UBI?
>>     
>         yes,  UBI will manage
>   
>>  Thanks in advance.
>>
>> Best regards,
>> Geiger
>> _______________________________________________
>> U-Boot mailing list
>> U-Boot at lists.denx.de
>> http://lists.denx.de/mailman/listinfo/u-boot 
>>     
>
>
>
>