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ArmPkg/ArmMmuLib: take MAX_ALLOC_ADDRESS into account

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When creating the page tables for the 1:1 mapping, ensure that we don't
attempt to map more than what is architecturally permitted when running
with 4 KB pages, which is 48 bits of VA. This will be reflected in the
value of MAX_ALLOC_ADDRESS once we override it for AArch64, so use that
macro instead of MAX_ADDRESS.

Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Leif Lindholm <leif.lindholm@linaro.org>
This commit is contained in:
Ard Biesheuvel 2018-12-07 11:57:22 +01:00
parent 76be882cdc
commit 1c36f028fa
1 changed files with 1 additions and 1 deletions
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ArmPkg/Library/ArmMmuLib/AArch64/ArmMmuLibCore.c
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@ -612,7 +612,7 @@ ArmConfigureMmu (
// use of 4 KB pages.
//
MaxAddress = MIN (LShiftU64 (1ULL, ArmGetPhysicalAddressBits ()) - 1,
MAX_ADDRESS);
MAX_ALLOC_ADDRESS);
// Lookup the Table Level to get the information
LookupAddresstoRootTable (MaxAddress, &T0SZ, &RootTableEntryCount);