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ArmPkg/ArmLib: Introduced TT_LAST_BLOCK_ADDRESS() 

This macro return the address of the last entry of a translation table.

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@14565 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
Olivier Martin 2013-08-19 17:36:16 +00:00 committed by oliviermartin
parent 48999d26c5
commit d9680b9485
2 changed files with 6 additions and 3 deletions
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3
ArmPkg/Include/Chipset/AArch64Mmu.h
View File

@ -43,6 +43,9 @@
// The first offset starts at 12bit. There are 4 levels of 9-bit address range from level 3 to level 0
#define TT_ADDRESS_AT_LEVEL(TableLevel) (1 << TT_ADDRESS_OFFSET_AT_LEVEL(TableLevel))
#define TT_LAST_BLOCK_ADDRESS(TranslationTable, EntryCount) \
((UINT64*)((EFI_PHYSICAL_ADDRESS)(TranslationTable) + (((EntryCount) - 1) * sizeof(UINT64))))
// There are 512 entries per table when 4K Granularity
#define TT_ENTRY_COUNT 512
#define TT_ALIGNMENT_BLOCK_ENTRY BIT12

6
ArmPkg/Library/ArmLib/AArch64/AArch64Mmu.c
View File

@ -279,7 +279,7 @@ GetBlockEntryListFromAddress (
// Get the Table info from T0SZ
GetRootTranslationTableInfo (T0SZ, &RootTableLevel, &RootTableEntryCount);
// The last block of the root table depends on the number of entry in this table
*LastBlockEntry = (UINT64*)((UINTN)RootTable + ((RootTableEntryCount - 1) * sizeof(UINT64)));
*LastBlockEntry = TT_LAST_BLOCK_ADDRESS(RootTable, RootTableEntryCount);
// If the start address is 0x0 then we use the size of the region to identify the alignment
if (RegionStart == 0) {
@ -333,7 +333,7 @@ GetBlockEntryListFromAddress (
BlockEntry = (UINT64*)TT_GET_ENTRY_FOR_ADDRESS (TranslationTable, IndexLevel + 1, RegionStart);
// Set the last block for this new table
*LastBlockEntry = (UINT64*)((UINTN)TranslationTable + ((TT_ENTRY_COUNT - 1) * sizeof(UINT64)));
*LastBlockEntry = TT_LAST_BLOCK_ADDRESS(TranslationTable, TT_ENTRY_COUNT);
}
} else if ((*BlockEntry & TT_TYPE_MASK) == TT_TYPE_BLOCK_ENTRY) {
// If we are not at the last level then we need to split this BlockEntry
@ -376,7 +376,7 @@ GetBlockEntryListFromAddress (
// Fill the BlockEntry with the new TranslationTable
*BlockEntry = ((UINTN)TranslationTable & TT_ADDRESS_MASK_DESCRIPTION_TABLE) | TableAttributes | TT_TYPE_TABLE_ENTRY;
// Update the last block entry with the newly created translation table
*LastBlockEntry = (UINT64*)((UINTN)TranslationTable + ((TT_ENTRY_COUNT - 1) * sizeof(UINT64)));
*LastBlockEntry = TT_LAST_BLOCK_ADDRESS(TranslationTable, TT_ENTRY_COUNT);
// Populate the newly created lower level table
BlockEntry = TranslationTable;