[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
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>>     
>
>
>
>