Move code to clear the page tables to a nasm macro.
No functional change.
Signed-off-by: Gerd Hoffmann <[email protected]>
Reviewed-by: Laszlo Ersek <[email protected]>
---
OvmfPkg/ResetVector/Ia32/PageTables64.asm | 35 ++++++++++++-----------
1 file changed, 19 insertions(+), 16 deletions(-)
diff --git a/OvmfPkg/ResetVector/Ia32/PageTables64.asm
b/OvmfPkg/ResetVector/Ia32/PageTables64.asm
index 6fec6f2beeea..378ba2feeb4f 100644
--- a/OvmfPkg/ResetVector/Ia32/PageTables64.asm
+++ b/OvmfPkg/ResetVector/Ia32/PageTables64.asm
@@ -45,6 +45,24 @@ BITS 32
%define TDX_BSP 1
%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
;
@@ -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)
--
2.44.0
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