X-Git-Url: https://git.proxmox.com/?p=mirror_edk2.git;a=blobdiff_plain;f=OvmfPkg%2FResetVector%2FIa32%2FPageTables64.asm;h=b5a4cf8d71871142bfb9e82a2551f25af62de4d0;hp=8280e8f140bf95d3dbe90e6febb05634b2604015;hb=b382ede3864e17e8827dbc90c7d4f1540b94ff3f;hpb=bb4aa855f3615352d1cbe733b1a329f6d94c7264

diff --git a/OvmfPkg/ResetVector/Ia32/PageTables64.asm b/OvmfPkg/ResetVector/Ia32/PageTables64.asm
index 8280e8f140..b5a4cf8d71 100644
--- a/OvmfPkg/ResetVector/Ia32/PageTables64.asm
+++ b/OvmfPkg/ResetVector/Ia32/PageTables64.asm
@@ -44,8 +44,10 @@ BITS    32
 SetCr3ForPageTables64:
 
     ;
-    ; For OVMF, build some initial page tables at 0x80000. This is just
-    ; after the early stack/temp RAM.
+    ; For OVMF, build some initial page tables at 0x800000-0x806000.
+    ;
+    ; This range should match with PcdOvmfSecPageTablesBase and
+    ; PcdOvmfSecPageTablesSize which are declared in the FDF files.
     ;
     ; At the end of PEI, the pages tables will be rebuilt into a
     ; more permanent location by DxeIpl.
@@ -54,21 +56,21 @@ SetCr3ForPageTables64:
     mov     ecx, 6 * 0x1000 / 4
     xor     eax, eax
 clearPageTablesMemoryLoop:
-    mov     dword[ecx * 4 + 0x80000 - 4], eax
+    mov     dword[ecx * 4 + 0x800000 - 4], eax
     loop    clearPageTablesMemoryLoop
 
     ;
     ; Top level Page Directory Pointers (1 * 512GB entry)
     ;
-    mov     dword[0x80000], 0x81000 + PAGE_PDP_ATTR
+    mov     dword[0x800000], 0x801000 + PAGE_PDP_ATTR
 
     ;
     ; Next level Page Directory Pointers (4 * 1GB entries => 4GB)
     ;
-    mov     dword[0x81000], 0x82000 + PAGE_PDP_ATTR
-    mov     dword[0x81008], 0x83000 + PAGE_PDP_ATTR
-    mov     dword[0x81010], 0x84000 + PAGE_PDP_ATTR
-    mov     dword[0x81018], 0x85000 + PAGE_PDP_ATTR
+    mov     dword[0x801000], 0x802000 + PAGE_PDP_ATTR
+    mov     dword[0x801008], 0x803000 + PAGE_PDP_ATTR
+    mov     dword[0x801010], 0x804000 + PAGE_PDP_ATTR
+    mov     dword[0x801018], 0x805000 + PAGE_PDP_ATTR
 
     ;
     ; Page Table Entries (2048 * 2MB entries => 4GB)
@@ -79,13 +81,13 @@ pageTableEntriesLoop:
     dec     eax
     shl     eax, 21
     add     eax, PAGE_2M_PDE_ATTR
-    mov     [ecx * 8 + 0x82000 - 8], eax
+    mov     [ecx * 8 + 0x802000 - 8], eax
     loop    pageTableEntriesLoop
 
     ;
     ; Set CR3 now that the paging structures are available
     ;
-    mov     eax, 0x80000
+    mov     eax, 0x800000
     mov     cr3, eax
 
     OneTimeCallRet SetCr3ForPageTables64