the following patch was just integrated into master: commit f0cd03c142013e0f50705a1c8741c0f02bea43de Author: Julius Werner jwerner@chromium.org Date: Thu Sep 19 20:15:45 2013 -0700
exynos5420: Don't map low addresses that lead nowhere
I just spent half a day (including the time to implement a stack dumper) to figure out that I am reading from a NULL pointer. A problem this simple should be more easy to catch. Let's mark the address range below SRAM as uncached so that the MMU can yell at you right away for being the bad programmer you are when you access a NULL pointer.
Change-Id: I4a3a13f75bf21b25732be2ecb69d47503eff1b53 Signed-off-by: Julius Werner jwerner@chromium.org Reviewed-on: https://chromium-review.googlesource.com/170112 Reviewed-by: Ronald Minnich rminnich@chromium.org (cherry picked from commit 7316732ea0ccdc0d607bde81dbb38ca9abd29fa9) Signed-off-by: Isaac Christensen isaac.christensen@se-eng.com Reviewed-on: http://review.coreboot.org/6650 Tested-by: build bot (Jenkins) Reviewed-by: Ronald G. Minnich rminnich@gmail.com
See http://review.coreboot.org/6650 for details.
-gerrit