Messages in this thread | | | Subject | Re: Setting MTRRs for K6 | Date | Sun, 4 Jul 1999 22:21:52 +0100 (BST) | From | Alan Cox <> |
| |
> On a AMD K6 you are given only two mtrr's, so one will go to main memory > and the other to video ram. I'm not sure how the non-power of two memory
The main memory on a K6 is handled seperately to the MTRR's. So you have one for the video, and one to mask out the mmio space (or one for video and one for texture maps)
> Finally, this is usually handled properly by the BIOS and if not by the > kernel for the main memory case (not so for video ram.) The fact that > on boot both registers are empty makes me suspicious that something is not > right in the kernel driver.
The memory case is handled by the BIOS. Its seperate to the MTRR. If it is misconfigured by the bios (eg modern K6-2 in an older board) the kernel actually goes and sets it during boot too.
Alan
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.rutgers.edu Please read the FAQ at http://www.tux.org/lkml/
| |