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authorSimon Glass <sjg@chromium.org>2011-06-07 11:25:22 -0700
committerSimon Glass <sjg@chromium.org>2011-08-29 10:39:17 -0700
commitec735e197ce59c8c6830df819759a0b08d8a1195 (patch)
tree23974b9c364b4fdaa1d2fa5561cc917416c39a20 /README
parentb49e49543568ae2f4ed5d88eba565cfe2caeb5fb (diff)
Add CONFIG_ALIGN_LCD_TO_SECTION to make frame buffer MMU-friendly
We want to make the display section-aligned on ARM so that we can easily turn off data caching for this. BUG=chromium-os:13082 TEST=build and boot U-Boot on seaboard Change-Id: Icbbc8cc473ff80b519bdd1c6520c9ed679260843 Reviewed-on: http://gerrit.chromium.org/gerrit/2240 Reviewed-by: Anton Staaf <robotboy@chromium.org> Tested-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'README')
-rw-r--r--README10
1 files changed, 10 insertions, 0 deletions
diff --git a/README b/README
index 0ab760bc5b..38a421555c 100644
--- a/README
+++ b/README
@@ -1215,6 +1215,16 @@ The following options need to be configured:
Normally display is black on white background; define
CONFIG_SYS_WHITE_ON_BLACK to get it inverted.
+
+ CONFIG_ALIGN_LCD_TO_SECTION
+
+ Normally the LCD is page-aligned (tyically 4KB). If this is
+ defined then the LCD will be aligned to MMU_SECTION_SIZE
+ instead. This is useful for architectures where it is cheaper
+ to change data cache settings on a per-section basis (such as
+ ARM).
+
+
- Splash Screen Support: CONFIG_SPLASH_SCREEN
If this option is set, the environment is checked for