Hello Wolfgang,
On Tue, May 11, 2010 at 4:56 AM, Wolfgang Denk wd@denx.de wrote:
Dear "George G. Davis",
In message AANLkTimWgVcvJX0DlG7iC5XQB-cRZdUQxPvWUe3LPREx@mail.gmail.com you wrote:
Why don't we have to invalidate/flush the I- and BT-Cache here? I.e.
why
is it sufficient to clean & invalidate the D-Cache here, only, and remove the existing I- and BT-Cache invalidation/flushing?
Quite frankly I thought for sure that it was handled elsewhere but now that I look I see that it's not. Meanwhile, I don't think U-Boot is typically susceptible to self-modifying-code issues anyway (?) and
What has self-modifying-code to do with it? Proper cache handling is mandatory in manyother siutuations as well, including when you load code (Linux kernel, standalone applications) and then try to execute these, or when dealing with I/O buffers, DMA, etc.
this isn't likely required but I suppose lack of I+BTB invalidation
I think it is mandatory.
Yes, you're right. New patch on the way shortly...
-- Regards, George
Best regards,
Wolfgang Denk
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