On Tue, Jan 14, 2003 at 09:51:13AM -0800, Tim Roberts wrote: >On Tue, 14 Jan 2003 07:51:10 -0500 (EST), Vladimir Dergachev wrote: >> >>One thing I don't understand about this is that this is an integrated >>graphics chipset, right ? I.e. it uses part of system RAM for video RAM. >>There is no code in radeon driver to deal with this yet. > >And there doesn't need to be. The allocation of video RAM from system RAM is >done by the BIOS very early in boot time. The physical address of the video >RAM gets stuffed into the PCI BAR register. The driver doesn't know or care >whether that address is physically on an AGP bus, or in system RAM. > >The Savage driver is an example. The Savage/IX uses shared memory, whereas the >Savage/MX has its own separate VRAM. The driver doesn't care at all.
I guess the Intel integrated graphics chips (810/815, 830M, 845G) are a little different then, with the agpgart kernel driver allowing additional system memory to be mapped into the video address space at runtime. David -- David Dawes Release Engineer/Architect The XFree86 Project www.XFree86.org/~dawes _______________________________________________ Devel mailing list [EMAIL PROTECTED] http://XFree86.Org/mailman/listinfo/devel
