1 files changed, 22 insertions, 0 deletions
diff --git a/UefiCpuPkg/PiSmmCpuDxeSmm/PiSmmCpuDxeSmm.h b/UefiCpuPkg/PiSmmCpuDxeSmm/PiSmmCpuDxeSmm.h
index 84efb22981..38f9104117 100644
--- a/UefiCpuPkg/PiSmmCpuDxeSmm/PiSmmCpuDxeSmm.h
+++ b/UefiCpuPkg/PiSmmCpuDxeSmm/PiSmmCpuDxeSmm.h
@@ -1243,4 +1243,26 @@ EFIAPI
 PiSmmCpuSmiEntryFixupAddress (
  );
 
+/**
+  This function reads CR2 register when on-demand paging is enabled
+  for 64 bit and no action for 32 bit.
+
+  @param[out]  *Cr2  Pointer to variable to hold CR2 register value.
+**/
+VOID
+SaveCr2 (
+  OUT UINTN  *Cr2
+  );
+
+/**
+  This function writes into CR2 register when on-demand paging is enabled
+  for 64 bit and no action for 32 bit.
+
+  @param[in]  Cr2  Value to write into CR2 register.
+**/
+VOID
+RestoreCr2 (
+  IN UINTN  Cr2
+  );
+
 #endif