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ArmPkg/ArmLib: Improved ArmConfigureMmu Performance 

Data & Instruction Caches can be kept enabled while the new
translation table is filled.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Eugene Cohen <eugene@hp.com>
Reviewed-By: Olivier Martin <olivier.martin@arm.com>



git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@15647 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
Eugene Cohen 2014-07-09 11:14:36 +00:00 committed by oliviermartin
parent 28087ef09f
commit ffb91edfd5
1 changed files with 12 additions and 12 deletions
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24
ArmPkg/Library/ArmLib/ArmV7/ArmV7Mmu.c
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@ -238,18 +238,6 @@ ArmConfigureMmu (
ZeroMem (TranslationTable, TRANSLATION_TABLE_SECTION_SIZE);
ArmCleanInvalidateDataCache ();
ArmInvalidateInstructionCache ();
ArmDisableDataCache ();
ArmDisableInstructionCache();
// TLBs are also invalidated when calling ArmDisableMmu()
ArmDisableMmu ();
// Make sure nothing sneaked into the cache
ArmCleanInvalidateDataCache ();
ArmInvalidateInstructionCache ();
// By default, mark the translation table as belonging to a uncached region
TranslationTableAttribute = ARM_MEMORY_REGION_ATTRIBUTE_UNCACHED_UNBUFFERED;
while (MemoryTable->Length != 0) {
@ -277,6 +265,18 @@ ArmConfigureMmu (
return RETURN_UNSUPPORTED;
}
ArmCleanInvalidateDataCache ();
ArmInvalidateInstructionCache ();
ArmDisableDataCache ();
ArmDisableInstructionCache();
// TLBs are also invalidated when calling ArmDisableMmu()
ArmDisableMmu ();
// Make sure nothing sneaked into the cache
ArmCleanInvalidateDataCache ();
ArmInvalidateInstructionCache ();
ArmSetTTBR0 ((VOID *)(UINTN)(((UINTN)TranslationTable & ~TRANSLATION_TABLE_SECTION_ALIGNMENT_MASK) | (TTBRAttributes & 0x7F)));
ArmSetDomainAccessControl (DOMAIN_ACCESS_CONTROL_NONE(15) |