Sorry I didn't respond to your earlier post. This was a holiday weekend in the US, and I've been trying to catch up.
To answer your earlier question: > Did VMIC run into similar problems when trying to run the driver > module on the VMIVME7050 (750FX/GX IBM PowerPC board)? > Because it is not yet in the list of supported boards? We have not done that port yet, but I'm sure the same problem exists. > While vme_dma_read() and vme_dma_write() worked already, even > on the PowerPC, > vme_peek() and vme_poke() (both based on PCI master windows) > did not work. > > Today I successfully made accesses using that functions with > my modified module, > giving me the desired results: > > 1st test: MVME2100 (PPC) master - MVME162 (68k) slave > vme_dma_read -A <VME address @ slave board> -d VME_D32 > vme_peek -A <VME address @ slave board> -d VME_D32 > Produced the same result for both accesses. > > 2nd test: MVME2100 (PPC) master - MVME162 (68k) slave > vme_dma_write -A <VME address @ slave board> -d VME_D32 0xDEADFACE > vme_peek -A <VME address @ slave board> -d VME_D32 > Produced the written value on reading. > > It seems, though I have to verify 1st, doing two things did the trick: > > 1.) Acquiring the PCI Window address range from the PCI bus > address range of the > bridge's PCI bus. > 2.) Writing a help function that converts the physical > address to a PCI bus > address (doing nothing for x86, and on PPC doing a > conversion). Only this > address may be used when writing to the Universe window registers. > > It seems this may be a solution that should work for both platforms. > > Somehow I'm very excited and happy! :) Very cool. > I will go clean up that code, test it more thoroughly (with > tracers enabled), > focus on slave windows afterwards, and maybe even get to test > it on a VMIVME7698 > - to verify it is still correct on Intel. > > When I got something more substantial than the current hack, > I'll submit it to > you, of course. Fantastic, you're a good guy! ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
