Le vendredi 20 octobre 2006 à 22:13 +0200, Petter Urkedal a écrit : [...] > I kind of expected we would have to write the PCI bus simulator > ourselves, since these emulators don't need to interface with real > hardware. (I read about the PCI bus, but I'm not sure how it looks like > form the OS.) [...]
Why can't you do without such a PCI bus simulator? (The board simulator model needs to interface with it?) It's not for the software only simulator I guess? Purely from the device driver software development point of view, we can't stick to OS-provided PCI API? (From what I know, all device programming is done via MMIO nowadays from the drivers, only the very early initialization part uses another way via a few PCI config regs to set up the MMIO spaces.) Btw, sorry if I said something stupid due to insuficient knowledge of the OGP specs (maybe there is no MMIO... in which case I'll have to check for a brown paper bag somewhere). Furthermore, driver development is only the first step. Ensuring adequate support at the Xorg and DRM level is needed nowadays to be a first-class citizen in the graphics board space. (Open specs and open documentation can do the rest afterwards - even without real hardware mass production IMHO.) > I guess OGD1 subsumes this whole discussion to a large extent since the > remaining parts are in re-programmable FPGA. So if it isn't easy, maybe > we should leave it for the present. Indeed, maybe sticking to the FPGA implementation is easiest in fine. The main advantage of the simulator is that it would be very easy and very cheap to distribute to many people; but that could prove too much additional work too (mainly on the software simulator probably). However, I still think that incorporating your own "device" into a system simulator like qemu or bochs may have some amusing side effects (like embedded applications developpers targeting an OGP-centric accelerated feature set without knowing). Rodolphe _______________________________________________ Open-graphics mailing list [email protected] http://lists.duskglow.com/mailman/listinfo/open-graphics List service provided by Duskglow Consulting, LLC (www.duskglow.com)
