On Sat, Oct 11, 2008 at 5:37 PM, ron minnich rminnich@gmail.com wrote:
On Fri, Oct 10, 2008 at 10:18 PM, Peter Stuge peter@stuge.se wrote:
XIP could never perform better than fetching from cache except if the cache is broken.
If cache is broken, CAR is not going to work very well, we have no stack --> we're not going to boot anyway ...
I think we let the guys who make the chips deal with broken cache issues.
I am unable to see the need for XIP at this point but I am willing to be shown that I am wrong.
Would using a small bit of XIP code enable us to detect broken cache and report that fact (post code, beep code, serial console printk) ?
Knowing that it's the CPU that is broken would allow one not to throw away the other good parts of the computer...