[U-Boot] Unaligned data transfers?

[U-Boot] Unaligned data transfers?

[Tor Krill]

Hi, 

I have a question regarding (disk) transfers. For example Sata read and
write takes an unspecified address which very well could be an unaligned
byte address.

Many DMA-controllers though require 16 or 32bit alignments for
transfers.

Is it safe to assume that the address is correct or bail out with an
error message if source/destinaton address isn't correctly aligned for
the underlaying HW?

/Tor

[U-Boot] Unaligned data transfers?

[Wolfgang Denk]

Dear Tor Krill,

In message <1275655059.2450.78.camel@tor-desktop> you wrote:
> 
> Is it safe to assume that the address is correct or bail out with an
> error message if source/destinaton address isn't correctly aligned for
> the underlaying HW?

No, you are supposed to know what you are doing and provide addresses
that are valid.

Like Perl, U-Boot gives you enough rope to hang yourself.


Best regards,

Wolfgang Denk

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