PCI in uClinux

Hi Hippo,

PCI problems solved. http://forum.niosforum.com/work2/style_emoticons/<#EMO_DIR#>/biggrin.gif

GigaBit Ethernet works fine with uClinux http://forum.niosforum.com/work2/style_emoticons/<#EMO_DIR#>/biggrin.gif

But your last tip doesn&#39;t work. The PCI-Compiler doesn&#39;t accept the highest Bit set.

To get PCI for me to work i just masked out the highest bit in the Device Bar Setup in ALTPCI.C

I wondered why you haven&#39;t done it. I think PCI can&#39;t work without that. Or just I/O-Access is possible.

Solong, i have a cheap and well working Gigabit-Ethernet on my uClinux-Board.

Tomorrow i will make a performance test. The results i will post here.

Thanx and Bye

Marco

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originally posted by hippo@Sep 27 2006, 11:33 PM

hi marco,

when i perpared the altpci driver, i had tried to simplify the address translation between pci space and avalon space. i decided to use the same address mapping for both spaces, so that i don&#39;t have to add another address tables in drivers.

i checked your ptf and altpci.c .

please update in the pci core toolbench, page 4, avalon config.

change the pci base address in the address translation table,

row 0, pci config space, pci base 0, == avalon 0x06000000 uncached to nios2 0x86000000

row 1, pci mem space, pci base 0x86100000, == nios2 0x86100000

row 2, pci mem space, pci base 0x86200000, == nios2 0x86200000

....

row 7, pci io space, pci base 0x86700000, == nios2 0x86700000

note, we need to uncache the access for nios2, by setting address bit 31 .

hope this will help.

hippo

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