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ArmPkg/BdsLib: Fixed cache cleaning in PreparePlatformHardware() 

Because the D&I caches were clean before to be disabled, the cache
lines might have got dirty during the cache maintenance operations.
This fix disables D&I caches before to clean them. The performance
drops should be minimised as invalidating the I cache is only a
couple of instruction.

Signed-off-by: Eugene Cohen <eugene@hp.com>
Reviewed-by: Olivier Martin <olivier.martin@arm.com>



git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@13503 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
oliviermartin 2012-07-04 20:24:25 +00:00
parent ce88684e2a
commit ed71a22c18
1 changed files with 2 additions and 2 deletions
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4
ArmPkg/Library/BdsLib/BdsLinuxLoader.c
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@ -25,12 +25,12 @@ PreparePlatformHardware (
//Note: Interrupts will be disabled by the GIC driver when ExitBootServices() will be called. //Note: Interrupts will be disabled by the GIC driver when ExitBootServices() will be called.
// Clean, invalidate, disable data cache // Clean, invalidate, disable data cache
ArmCleanInvalidateDataCache();
ArmDisableDataCache(); ArmDisableDataCache();
ArmCleanInvalidateDataCache();
// Invalidate and disable the Instruction cache // Invalidate and disable the Instruction cache
ArmInvalidateInstructionCache ();
ArmDisableInstructionCache (); ArmDisableInstructionCache ();
ArmInvalidateInstructionCache ();
// Turn off MMU // Turn off MMU
ArmDisableMmu(); ArmDisableMmu();