1 files changed, 38 insertions, 0 deletions
diff --git a/src/VBox/Devices/EFI/Firmware/UefiCpuPkg/Library/BaseUefiCpuLib/BaseUefiCpuLib.c b/src/VBox/Devices/EFI/Firmware/UefiCpuPkg/Library/BaseUefiCpuLib/BaseUefiCpuLib.c
new file mode 100644
index 00000000..6b066671
--- /dev/null
+++ b/src/VBox/Devices/EFI/Firmware/UefiCpuPkg/Library/BaseUefiCpuLib/BaseUefiCpuLib.c
@@ -0,0 +1,38 @@
+/** @file
+  This library defines some routines that are generic for IA32 family CPU.
+
+  The library routines are UEFI specification compliant.
+
+  Copyright (c) 2020, AMD Inc. All rights reserved.<BR>
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#include <Register/Intel/Cpuid.h>
+#include <Register/Amd/Cpuid.h>
+
+#include <Library/BaseLib.h>
+#include <Library/UefiCpuLib.h>
+
+/**
+  Determine if the standard CPU signature is "AuthenticAMD".
+
+  @retval TRUE  The CPU signature matches.
+  @retval FALSE The CPU signature does not match.
+
+**/
+BOOLEAN
+EFIAPI
+StandardSignatureIsAuthenticAMD (
+  VOID
+  )
+{
+  UINT32  RegEbx;
+  UINT32  RegEcx;
+  UINT32  RegEdx;
+
+  AsmCpuid (CPUID_SIGNATURE, NULL, &RegEbx, &RegEcx, &RegEdx);
+  return (RegEbx == CPUID_SIGNATURE_AUTHENTIC_AMD_EBX &&
+          RegEcx == CPUID_SIGNATURE_AUTHENTIC_AMD_ECX &&
+          RegEdx == CPUID_SIGNATURE_AUTHENTIC_AMD_EDX);
+}