diff options
| -rw-r--r-- | OvmfPkg/ResetVector/Ia32/PageTables64.asm | 35 |
1 files changed, 19 insertions, 16 deletions
diff --git a/OvmfPkg/ResetVector/Ia32/PageTables64.asm b/OvmfPkg/ResetVector/Ia32/PageTables64.asm index 6fec6f2bee..378ba2feeb 100644 --- a/OvmfPkg/ResetVector/Ia32/PageTables64.asm +++ b/OvmfPkg/ResetVector/Ia32/PageTables64.asm @@ -46,6 +46,24 @@ BITS 32 %define TDX_AP 2
;
+; For OVMF, build some initial page tables at
+; PcdOvmfSecPageTablesBase - (PcdOvmfSecPageTablesBase + 0x6000).
+;
+; This range should match with PcdOvmfSecPageTablesSize which is
+; declared in the FDF files.
+;
+; At the end of PEI, the pages tables will be rebuilt into a
+; more permanent location by DxeIpl.
+;
+%macro ClearOvmfPageTables 0
+ mov ecx, 6 * 0x1000 / 4
+ xor eax, eax
+.clearPageTablesMemoryLoop:
+ mov dword[ecx * 4 + PT_ADDR (0) - 4], eax
+ loop .clearPageTablesMemoryLoop
+%endmacro
+
+;
; Modified: EAX, EBX, ECX, EDX
;
SetCr3ForPageTables64:
@@ -69,22 +87,7 @@ SetCr3ForPageTables64: OneTimeCall GetSevCBitMaskAbove31
ClearOvmfPageTables:
- ;
- ; For OVMF, build some initial page tables at
- ; PcdOvmfSecPageTablesBase - (PcdOvmfSecPageTablesBase + 0x6000).
- ;
- ; This range should match with PcdOvmfSecPageTablesSize which is
- ; declared in the FDF files.
- ;
- ; At the end of PEI, the pages tables will be rebuilt into a
- ; more permanent location by DxeIpl.
- ;
-
- mov ecx, 6 * 0x1000 / 4
- xor eax, eax
-clearPageTablesMemoryLoop:
- mov dword[ecx * 4 + PT_ADDR (0) - 4], eax
- loop clearPageTablesMemoryLoop
+ ClearOvmfPageTables
;
; Top level Page Directory Pointers (1 * 512GB entry)
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