[U-Boot] is any bug in cp?

[hacklu.uboot]

 em..
how linux does that?
does linux read the data to mem first before it write to the same bank of a nor flash?

thanks much~

------------------				 
hacklu.uboot
2011-04-15

-------------------------------------------------------------
发件人：Wolfgang Denk
发送日期：2011-04-15 16:44:47
收件人：hacklu.uboot
抄送：u-boot
主题：Re: [U-Boot] is any bug in cp?

Dear "hacklu.uboot",

In message <201104151401034442433 at gmail.com> you wrote:
> 
> there is some bugs when I cp to flash like this:
> cp.b addr1 addr2 0x100
> 
> when the two addr in the same bank of a flash. it go wrongs
> 
> finally the date of addr2 is  0x8080808080...
> 
> cp to another bank of flash is work correctly.
> cp from mem to flash or from flash to mem also correctly.

You cannot copy directly within the same bank of NOR flash.
While in programming mod, you cannot read any user data from that
device.  This is a "feature" of how NOR flash works and no bug in the
code.  Just don't do it.

Best regards,

Wolfgang Denk

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