diff options
Diffstat (limited to 'ArmPkg/Library/ArmLib/AArch64/AArch64Mmu.c')
| -rw-r--r-- | ArmPkg/Library/ArmLib/AArch64/AArch64Mmu.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/ArmPkg/Library/ArmLib/AArch64/AArch64Mmu.c b/ArmPkg/Library/ArmLib/AArch64/AArch64Mmu.c index df37154f35..b2ab5aa7bb 100644 --- a/ArmPkg/Library/ArmLib/AArch64/AArch64Mmu.c +++ b/ArmPkg/Library/ArmLib/AArch64/AArch64Mmu.c @@ -295,8 +295,9 @@ GetBlockEntryListFromAddress ( BaseAddressAlignment = LowBitSet64 (RegionStart);
}
- // Identify the Page Level the RegionStart must belongs to
- PageLevel = 3 - ((BaseAddressAlignment - 12) / 9);
+ // Identify the Page Level the RegionStart must belong to. Note that PageLevel
+ // should be at least 1 since block translations are not supported at level 0
+ PageLevel = MAX (3 - ((BaseAddressAlignment - 12) / 9), 1);
// If the required size is smaller than the current block size then we need to go to the page below.
// The PageLevel was calculated on the Base Address alignment but did not take in account the alignment
|