On Monday 17 December 2001 2:55 pm, Philip Brown wrote: > On Mon, Dec 17, 2001 at 10:52:04PM +0100, Alexander Stohr wrote: > > ... > > Anyways, you might consider reading open source like existing > > 440BX coding in agpgart in order to see what is required. > > err, that's what I'm DOING :-) Trouble is, there are virtually zero > comments in the /dev/agpgart driver, and I'm not intimately familiar > with the linux page allocation stuff, so it's not clear to me what kind > of values are being put in the GATT table: addresses, or page numbers, > or...
It depends on the chipset. :-) Typically it is physical addresses, with an extra bit OR'd in to tell the chipset the entry is valid. The Intel 460GX is an exception; I think its GATT entries are page numbers with an extra bit. In general, the GATT entries are the output of the *_mask() functions, which take a physical address and a type as arguments. -- Bjorn Helgaas - [EMAIL PROTECTED] Linux Systems Operation R&D Hewlett-Packard _______________________________________________ Dri-devel mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/dri-devel
