Changeset 77662 in vbox for trunk/src/VBox/Devices/EFI/FirmwareNew/MdePkg/Library/BaseLib/Ia32/GccInline.c

Timestamp:

Mar 12, 2019 12:40:12 PM (6 years ago)

Author:

vboxsync

svn:sync-xref-src-repo-rev:

129295

Message:

EFI: First step in UDK2018 merge. Does not build yet.

Location:

trunk/src/VBox/Devices/EFI/FirmwareNew

Files:

• . (modified) (1 prop)
• MdePkg/Library/BaseLib/Ia32/GccInline.c (modified) (3 diffs)

trunk/src/VBox/Devices/EFI/FirmwareNew/MdePkg/Library/BaseLib/Ia32/GccInline.c

@@ -2 +2 @@
   GCC inline implementation of BaseLib processor specific functions.
 
-  Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR>
+  Copyright (c) 2006 - 2015, Intel Corporation. All rights reserved.<BR>
   Portions copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
   This program and the accompanying materials
@@ -1746 +1746 @@
   )
 {
+  UINT32  RegEdx;
+
+  //
+  // If the CPU does not support CLFLUSH instruction,
+  // then promote flush range to flush entire cache.
+  //
+  AsmCpuid (0x01, NULL, NULL, NULL, &RegEdx);
+  if ((RegEdx & BIT19) == 0) {
+    __asm__ __volatile__ ("wbinvd":::"memory");
+    return LinearAddress;
+  }
+
+
   __asm__ __volatile__ (
     "clflush (%0)"
@@ -1753 +1766 @@
     );
 
-    return LinearAddress;
-}
-
-
+  return LinearAddress;
+}
+
+