diff options
Diffstat (limited to 'ArmPkg')
| -rw-r--r-- | ArmPkg/Library/ArmMmuLib/Arm/ArmMmuLibCore.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/ArmPkg/Library/ArmMmuLib/Arm/ArmMmuLibCore.c b/ArmPkg/Library/ArmMmuLib/Arm/ArmMmuLibCore.c index ec51e072ab..889b22867d 100644 --- a/ArmPkg/Library/ArmMmuLib/Arm/ArmMmuLibCore.c +++ b/ArmPkg/Library/ArmMmuLib/Arm/ArmMmuLibCore.c @@ -695,8 +695,12 @@ UpdateSectionEntries ( } else {
// still a section entry
- // mask off appropriate fields
- Descriptor = CurrentDescriptor & ~EntryMask;
+ if (CurrentDescriptor != 0) {
+ // mask off appropriate fields
+ Descriptor = CurrentDescriptor & ~EntryMask;
+ } else {
+ Descriptor = ((UINTN)FirstLevelIdx + i) << TT_DESCRIPTOR_SECTION_BASE_SHIFT;
+ }
// mask in new attributes and/or permissions
Descriptor |= EntryValue;
|