On Thu, 9 Oct 2003, Jacky Lam wrote: > Dear all, > > Could anyone give me some notes/idea what should be take care to port an > x86 PCI card driver to powerpc walnut platform? I try several > cards(ethernet, audio) which run well on my PC by cross-compiling the > drivers. They can be recognized successfully, but none of them works. Walnut > seems don't be able to receive any interrupt from the cards. > > I guess there must be something about PCI implementation in PPC > different from x86. Is there any expert on PPC PCI can tell me what happen? > Or any related documentation can help?
Best guess, the driver doesn't handle any of the endian issues. PPC is a big-endian processor, x86 is little endian. Most likely you've got data that needs to be byte swapped in order to work. Best way I know of to find out if this is the case is using a PCI bus analyzer to watch the PCI bus. -Bret -- Bret Indrelee QLogic Corporation Bret.Indrelee at qlogic.com 6321 Bury Drive, St 13, Eden Prairie, MN 55346 ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
