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authorStefan Reinauer <reinauer@chromium.org>2013-05-20 15:21:48 -0700
committerStefan Reinauer <stefan.reinauer@coreboot.org>2013-07-10 21:46:33 +0200
commit6c184d6855a11d42f9d77bc9ddb8dfeb608072b6 (patch)
tree6818dfc123613e5ceabe092de64a1abafc4b1015 /src
parentf17519120a4d76cd18d12e94987b65b336f32f59 (diff)
exynos5420: Don't disable and re-enable the MMU when uncaching the framebuffer
At one time it seemed to be necessary to disable and then re-enable the MMU when setting the framebuffer to be uncache-able due to bugs in the MMU management code. Since those bugs have been fixed, this is no longer necessary. Change-Id: I7ce825cf5eaaa95119364d780cba0935752e4632 Signed-off-by: Gabe Black <gabeblack@chromium.org> Signed-off-by: Stefan Reinauer <reinauer@chromium.org> Reviewed-on: http://review.coreboot.org/3667 Tested-by: build bot (Jenkins) Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Diffstat (limited to 'src')
-rw-r--r--src/cpu/samsung/exynos5420/cpu.c4
1 files changed, 0 insertions, 4 deletions
diff --git a/src/cpu/samsung/exynos5420/cpu.c b/src/cpu/samsung/exynos5420/cpu.c
index e83c16ad0a..1d511743b2 100644
--- a/src/cpu/samsung/exynos5420/cpu.c
+++ b/src/cpu/samsung/exynos5420/cpu.c
@@ -105,15 +105,11 @@ static void exynos_displayport_init(device_t dev)
* Note: We may want to do something clever to ensure the framebuffer
* region is aligned such that we don't change dcache policy for other
* stuff inadvertantly.
- *
- * FIXME: Is disabling/re-enabling the MMU entirely necessary?
*/
uint32_t lower = ALIGN_DOWN(lcdbase, MiB);
uint32_t upper = ALIGN_UP(lcdbase + fb_size, MiB);
dcache_clean_invalidate_by_mva(lower, upper - lower);
- dcache_mmu_disable();
mmu_config_range(lower/MiB, (upper - lower)/MiB, DCACHE_OFF);
- dcache_mmu_enable();
mmio_resource(dev, 1, lcdbase/KiB, (fb_size + KiB - 1)/KiB);
printk(BIOS_DEBUG,