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authorGabe Black <gabeblack@google.com>2013-05-18 22:57:34 -0700
committerStefan Reinauer <stefan.reinauer@coreboot.org>2013-07-10 21:06:46 +0200
commit986162b25f1038e5425713883310ba6002859d7d (patch)
treeec5704c64408bb067c02b8b65d42b22afc366c31
parent800790d4e1e4817a140c706a32b5448cbd9d0c45 (diff)
exynos5250: 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: I5f7b9bd14dc9929efe1834ec9a258d388b8c94e9 Signed-off-by: Gabe Black <gabeblack@chromium.org> Reviewed-on: http://review.coreboot.org/3654 Tested-by: build bot (Jenkins) Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
-rw-r--r--src/cpu/samsung/exynos5250/cpu.c4
1 files changed, 0 insertions, 4 deletions
diff --git a/src/cpu/samsung/exynos5250/cpu.c b/src/cpu/samsung/exynos5250/cpu.c
index 3ab57c9f05..d2a6df7fc4 100644
--- a/src/cpu/samsung/exynos5250/cpu.c
+++ b/src/cpu/samsung/exynos5250/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,