ArmPkg/CpuDxe: use private copy of GetRootTranslationTableInfo()

[mirror_edk2.git] / ArmPkg / Drivers / CpuDxe / AArch64 / Mmu.c

diff --git a/ArmPkg/Drivers/CpuDxe/AArch64/Mmu.c b/ArmPkg/Drivers/CpuDxe/AArch64/Mmu.c
index 3b6c5e733709836fdca206ff8e1ad1134f25d4e5..24eb1c4221e31ff18b77914fee963923a21c3124 100644 (file)
--- a/ArmPkg/Drivers/CpuDxe/AArch64/Mmu.c
+++ b/ArmPkg/Drivers/CpuDxe/AArch64/Mmu.c
@@ -15,6 +15,21 @@ SPDX-License-Identifier: BSD-2-Clause-Patent
 \r
 #define TT_ATTR_INDX_INVALID    ((UINT32)~0)\r
 \r
+#define MIN_T0SZ        16\r
+#define BITS_PER_LEVEL  9\r
+\r
+STATIC\r
+VOID\r
+GetRootTranslationTableInfo (\r
+  IN  UINTN     T0SZ,\r
+  OUT UINTN     *RootTableLevel,\r
+  OUT UINTN     *RootTableEntryCount\r
+  )\r
+{\r
+  *RootTableLevel       = (T0SZ - MIN_T0SZ) / BITS_PER_LEVEL;\r
+  *RootTableEntryCount  = TT_ENTRY_COUNT >> (T0SZ - MIN_T0SZ) % BITS_PER_LEVEL;\r
+}\r
+\r
 STATIC\r
 UINT64\r
 GetFirstPageAttribute (\r