Tom Sylla wrote: >> Not on the Geode: we don't have MTRRs, so I guess the kernel >> is being mapped by 4KB pages. > > 4MB page support is unrelated to MTRR support. (one is related to linear > addresses, the other physical addresses; please see the Intel or AMD > documentation on paging and caching) > > Geode LX supports 4MB pages, it is reported as such in CPUID, and should > be used by the kernel. > > Also note that Geode LX has "RCONFs" instead of MTRRs, which have the > same functionality, and they are all programmed properly by the firmware.
So I wonder why we couldn't use these to speed up access to the framebuffer in the amd_drv X driver. Jordan, what do you think? -- \___/ |___| Bernardo Innocenti - http://www.codewiz.org/ \___\ One Laptop Per Child - http://www.laptop.org/ _______________________________________________ Devel mailing list [email protected] http://lists.laptop.org/listinfo/devel
