> + //
> + // Check cpu runs in 64bit long mode or 32bit protected mode.
1. this comment seems to be redundant.
> + //
> + if (sizeof (UINTN) == sizeof (UINT64)) {
> + //
> + // If cpu has already runned in 64bit long mode PEI, Page table Level in
> DXE
> must align with previous level.
2. runned -> run
> + //
> + Cr4.UintN = AsmReadCr4 ();
> + Page5LevelSupport = Cr4.Bits.LA57 ? TRUE : FALSE;
3. "Cr4.Bits.LA57 != 0"
> + ASSERT (PcdGetBool (PcdUse5LevelPageTable) == Page5LevelSupport);
4. Good check!
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