Re: [Linux-ATM-General] Re: ATM driver for 8260 (linux 2.4.x)

In message [off-list ref] you wrote:

For some reason the interrupt handler reads old
values, although the CPM puts new data. (I checked it

Sounds like a cache problem...

using JTAG). It seems
like the old data are kept on buffers and are not
refreshed. Unfortunetely i did what Hofrat saied,
but it doesn't work. Is there a function for forcing
refresh? flush_tlb or flush_dcache perhaps?

flush_dcache_range().

quoted

quoted

Also, in the original driver Alex used the
mm_alloc_uncached_pages function, but i have

replased

quoted

it with kmalloc(size, GFP_KERNEL). Is it correct?

Hint! Hint!

Hope this helps,

Wolfgang Denk

--
Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
Phone: (+49)-8142-4596-87  Fax: (+49)-8142-4596-88  Email: wd@denx.de
As far as we know, our computer has never had an undetected error.
		                                           -- Weisert

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  It was realy cache problem! I had to disable
both caches I,D from the head.S to find that!
Well the receaver works ok with Dcache off....
As I looked from the mpc860sar code, there is a
way to tell linux not to cache specific pages.
But the functions are not compatible with 8260.
Does anyone know how to do that for 8260?

                    Thanks a lot for your time!
                        D. Meidanis


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