bd8ef7964e
The ARM64 MMU code maintains a list of used ranges, to avoid mapping the DMA buffer over the coreboot tables and things like that. Unfortunately, the overlap with ranges in that list is checked with (start1 >= start2 && start1 <= end2) || (end1 >= start2 && end1 <= end2) which is not a full overlap check and misses the case where the second region is completely contained within the first. This patch replaces that code with a properly vetted primitive from Stack Overflow. BRANCH=none BUG=chrome-os-partner:54416 TEST=Observe how Kevin recovery screen now gets drawn at 10x the speed. Change-Id: Ie4dd43afeb8a30fedc4da28ccc6ecce9589d23f3 Signed-off-by: Julius Werner <jwerner@chromium.org> Reviewed-on: https://review.coreboot.org/16075 Tested-by: build bot (Jenkins) Reviewed-by: Aaron Durbin <adurbin@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/368782 Commit-Ready: Furquan Shaikh <furquan@chromium.org> Tested-by: Furquan Shaikh <furquan@chromium.org> |
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