Revision: 18756
http://sourceforge.net/p/edk2/code/18756
Author: abiesheuvel
Date: 2015-11-09 13:27:36 +0000 (Mon, 09 Nov 2015)
Log Message:
-----------
ArmCacheMaintenanceLib: disallow whole D-cache maintenance operations
The ARM architecture provides no reliable way to clean or invalidate
the entire data cache at runtime. The reason is that such maintenance
requires the use of set/way maintenance operations, which are suitable
only for the kind of maintenance that is carried out when the cache is
taken offline entirely.
So ASSERT () when any of the CacheMaintenanceLib whole data cache routines
are invoked rather than pretending we can do anything meaningful here.
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Ard Biesheuvel <[email protected]>
Reviewed-by: Leif Lindholm <[email protected]>
Modified Paths:
--------------
trunk/edk2/ArmPkg/Library/ArmCacheMaintenanceLib/ArmCacheMaintenanceLib.c
Modified:
trunk/edk2/ArmPkg/Library/ArmCacheMaintenanceLib/ArmCacheMaintenanceLib.c
===================================================================
--- trunk/edk2/ArmPkg/Library/ArmCacheMaintenanceLib/ArmCacheMaintenanceLib.c
2015-11-09 13:27:15 UTC (rev 18755)
+++ trunk/edk2/ArmPkg/Library/ArmCacheMaintenanceLib/ArmCacheMaintenanceLib.c
2015-11-09 13:27:36 UTC (rev 18756)
@@ -14,6 +14,7 @@
**/
#include <Base.h>
#include <Library/ArmLib.h>
+#include <Library/DebugLib.h>
#include <Library/PcdLib.h>
VOID
@@ -44,7 +45,6 @@
VOID
)
{
- ArmCleanDataCache();
ArmInvalidateInstructionCache();
}
@@ -54,7 +54,7 @@
VOID
)
{
- ArmInvalidateDataCache();
+ ASSERT (FALSE);
}
VOID *
@@ -75,7 +75,7 @@
VOID
)
{
- ArmCleanInvalidateDataCache();
+ ASSERT (FALSE);
}
VOID *
@@ -95,7 +95,7 @@
VOID
)
{
- ArmCleanDataCache();
+ ASSERT (FALSE);
}
VOID *
------------------------------------------------------------------------------
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