ArmPlatformPkg: PrePei Cache disable and invalidate.

- Disable data cache on all cores.
- Do not clean caches as there might be junk in them, invalidate only.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Olivier Martin <olivier.martin@arm.com>



git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@14527 6f19259b-4bc3-4df7-8a09-765794883524

1 files changed, 6 insertions, 9 deletions

diff --git a/ArmPlatformPkg/PrePi/PrePi.c b/ArmPlatformPkg/PrePi/PrePi.c
index e8b1ff7ed7..7ef88c0e36 100755
--- a/ArmPlatformPkg/PrePi/PrePi.c
+++ b/ArmPlatformPkg/PrePi/PrePi.c
@@ -1,6 +1,6 @@
 /** @file

 *

-*  Copyright (c) 2011-2012, ARM Limited. All rights reserved.

+*  Copyright (c) 2011-2013, ARM Limited. All rights reserved.

 *

 *  This program and the accompanying materials

 *  are licensed and made available under the terms and conditions of the BSD License

@@ -222,16 +222,13 @@ CEntryPoint (
     StartTimeStamp = 0;

   }

 

-  // Clean Data cache

-  ArmCleanInvalidateDataCache ();

-

+  // Data Cache enabled on Primary core when MMU is enabled.

+  ArmDisableDataCache ();

+  // Invalidate Data cache

+  ArmInvalidateDataCache ();

   // Invalidate instruction cache

   ArmInvalidateInstructionCache ();

-

-  //TODO:Drain Write Buffer

-

-  // Enable Instruction & Data caches

-  ArmEnableDataCache ();

+  // Enable Instruction Caches on all cores.

   ArmEnableInstructionCache ();

 

   // Define the Global Variable region when we are not running in XIP