On Fri, Mar 26, 2010 at 01:52:24PM -0600, Grant Likely wrote: > I could change the statement to something like, "virtually tagged or > indexed data cache(s) must be off", or drop the statement entirely > since it is implied by the requirement that the MMU must be off.
1. We're not going down the path of having differing conditions for different caches; to do so would mean that we'd need to have two entirely different sets of code to handle booting in the kernel. 2. No ARM CPU supports having the D-cache enabled without the MMU; the data cache needs to be told via the page tables what can be cached and what can't - it needs to be told that RAM can cached but IO devices must not be. In short, the MMU must always be off, which in turn means the D-cache must always be disabled. _______________________________________________ devicetree-discuss mailing list devicetree-discuss@lists.ozlabs.org https://lists.ozlabs.org/listinfo/devicetree-discuss
