[edk2-devel] [PATCH 02/10] OvmfPkg/ResetVector: add ClearOvmfPageTables macro

["Gerd Hoffmann" <kraxel@redhat.com>]

Move code to clear the page tables to a nasm macro.
No functional change.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 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)
-- 
2.43.2



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