On Thu, Nov 8, 2012 at 12:53 PM, Gerd Hoffmann <[email protected]> wrote: > Is there some way to do _unaligned_ I/O?
Seems like you're going to need to: * Pull IoRead/Write16 from MdePkg/Library/BaseIoLibIntrinsic into the driver. * Rename to UnalignedIoRead/Write16 and remove the alignment assert * Read the BAR to get the address * Use UnalignedIoRead/Write16 -Jordan > Background: > > I'm trying to extend the ovmf video driver, so it isn't limited to the > cirrus gfx card but can handle the other vga cards emulated by qemu/kvm > too. The easiest way to get this going is to use the bochs display > interface directly for modesetting. > > The problem with that approach is that the data register for the bochs > dispi interface is a 16bit register at a uneven address (0x01CF to be > exact). There seems to be no easy way to do that ... > > And, no, splitting that into two 8-byte accesses doesn't cut it, it must > be an outw instruction. > > Hints anyone? > > thanks, > Gerd > > PS: wip patch attached for reference > ------------------------------------------------------------------------------ Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_d2d_nov _______________________________________________ edk2-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/edk2-devel
