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Altera_Forum's avatar
Altera_Forum
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17 years ago

Linux with MMU on NEEK

Hi, all. I'm testing Linux MMU version, on my NEEK. http://www.nioswiki.com/linux It works fine and I can use "bash" shell. This is the evident proof that we are using the true 'fo...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

Hi,

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Is the software part already implemented in the Kernel ?

Does it work ?

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Yes, of course, we are using these. Nios's TLB control parts are included in the file '/nios2-linux/linux-2.6/arch/nios2/mm/mmu_context.c, tlb.c' and cache flush functions are included in '/nios2-linux/linux-2.6/arch/nios2/mm/cacheflush.c'.

But please note that the cache size is limited within 4KB. In present codes, there is no mechanism to avoid the alias problem.

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Decent performance ?

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Though I don't have any concrete data for the performance, but I think it is not so bad. FLTK's demos. for example, 'editor' works well. It uses 'Bitblit' functionality and this is heavy task for Nios CPU and its MMU, but the scrolling speed is not so slow.

Kazu