SimpleFbDxe: also flush cache after initial clear

2019-02-23 18:17:33 -08:00 · 2019-02-23 18:17:33 -08:00 · 021fa1e4d7
commit 021fa1e4d7
parent 98d6c66bbd
1 changed files with 3 additions and 0 deletions
--- a/Pixel3XL/SimpleFbDxe/SimpleFbDxe.c
+++ b/Pixel3XL/SimpleFbDxe/SimpleFbDxe.c
@ -172,6 +172,7 @@ DisplayBlt
    IN  UINTN                             Delta         OPTIONAL
 )
 {
+
  RETURN_STATUS                         Status;
  EFI_TPL                               Tpl;
  //
@ -296,6 +297,8 @@ SimpleFbDxeInitialize
    // zhuowei: clear the screen to black
    // UEFI standard requires this, since text is white - see OvmfPkg/QemuVideoDxe/Gop.c
    ZeroMem((void*)FrameBufferAddress, FrameBufferSize);
+    // hack: clear cache
+    WriteBackInvalidateDataCacheRange((void*)FrameBufferAddress, FrameBufferSize);
    // zhuowei: end
 
    /* Register handle */