Re: 5121 cache handling.

Kenneth Johansson wrote:

But the code allocate the 52KB buffer with vmalloc that cant be right as
cache is stored with physical address the 52KB data need to be 52KB
continuous in physical address and vmalloc do not guarantee that.

Yeah, that looks like a bug.

quoted

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should not the framebuffer be marked as cache write through. that is the
W bit should be set in the tlb mapping. Why is this not done ? is that
feature also not working on 5121 ??

It probably would have been too slow.

how much slower would write through be ? I thought it was not that big
of a difference from copy back.

It's a big difference if you're writing out an entire cache line of data 
anyway, but because of write-through it goes out one word at a time 
without bursting.

-Scott