Update the LastBlockEntry return value when allocating a new page table block
and the parent page table entry is not valid. Discovered when producing page
table entries for a memory region that spans multiple page table entries of a
parent page table block. Not very memory space efficient because the rest of
the code could calculate a required page level that is deeper than some blocks
of the memory region might require. Case that found the problem:
MemoryRegion->VirtualBase = 0
MemoryRegion->Length = 0x7F000000
This fix will create an un-needed level of page table for address
range 0 -> 0x40000000
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Garrett Kirkendall <garrett.kirkendall@amd.com>
Reviewed-By: Olivier Martin <olivier.martin@arm.com>
git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@15177
6f19259b-4bc3-4df7-8a09-
765794883524
\r
// Fill the new BlockEntry with the TranslationTable\r
*BlockEntry = ((UINTN)TranslationTable & TT_ADDRESS_MASK_DESCRIPTION_TABLE) | TT_TYPE_TABLE_ENTRY;\r
+ // Update the last block entry with the newly created translation table\r
+ *LastBlockEntry = TT_LAST_BLOCK_ADDRESS(TranslationTable, TT_ENTRY_COUNT);\r
}\r
}\r
}\r