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@@ -37,7 +37,9 @@
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#define IA32_PG_PMNT BIT62
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#define IA32_PG_NX BIT63
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-#define PAGE_ATTRIBUTE_BITS (IA32_PG_D | IA32_PG_A | IA32_PG_U | IA32_PG_RW | IA32_PG_P)
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+#define PAGE_ATTRIBUTE_BITS (IA32_PG_D | IA32_PG_A | IA32_PG_U | IA32_PG_RW | IA32_PG_P)
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+#define PAGE_ATTRIBUTE_BITS_POST_SPLIT (IA32_PG_RW | IA32_PG_P)
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+
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//
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// Bits 1, 2, 5, 6 are reserved in the IA32 PAE PDPTE
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// X64 PAE PDPTE does not have such restriction
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@@ -583,7 +585,7 @@ SplitPage (
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NewPageEntry[Index] = (BaseAddress + SIZE_4KB * Index) | AddressEncMask | ((*PageEntry) & PAGE_PROGATE_BITS);
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}
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- (*PageEntry) = (UINT64)(UINTN)NewPageEntry | AddressEncMask | ((*PageEntry) & PAGE_ATTRIBUTE_BITS);
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+ (*PageEntry) = (UINT64)(UINTN)NewPageEntry | AddressEncMask | PAGE_ATTRIBUTE_BITS_POST_SPLIT;
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return RETURN_SUCCESS;
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} else {
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return RETURN_UNSUPPORTED;
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@@ -606,7 +608,7 @@ SplitPage (
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NewPageEntry[Index] = (BaseAddress + SIZE_2MB * Index) | AddressEncMask | IA32_PG_PS | ((*PageEntry) & PAGE_PROGATE_BITS);
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}
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- (*PageEntry) = (UINT64)(UINTN)NewPageEntry | AddressEncMask | ((*PageEntry) & PAGE_ATTRIBUTE_BITS);
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+ (*PageEntry) = (UINT64)(UINTN)NewPageEntry | AddressEncMask | PAGE_ATTRIBUTE_BITS_POST_SPLIT;
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return RETURN_SUCCESS;
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} else {
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return RETURN_UNSUPPORTED;
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