1 files changed, 78 insertions, 0 deletions
diff --git a/ReferenceCode/Haswell/Txt/TxtInit/Dxe/TxtDxeOem.c b/ReferenceCode/Haswell/Txt/TxtInit/Dxe/TxtDxeOem.c
new file mode 100644
index 0000000..bed83ec
--- /dev/null
+++ b/ReferenceCode/Haswell/Txt/TxtInit/Dxe/TxtDxeOem.c
@@ -0,0 +1,78 @@
+/** @file
+  This file contain OEM/Platform implementation for TXT in DXE phase.  It represents an abstract outline of the
+  steps required during DXE for enabling TXT.  Each individual step is further
+  abstracted behind a function call interface.  This is intended to minimize
+  the need to modify this file when porting TXT to future platforms.
+
+@copyright
+  Copyright (c) 1999 - 2012 Intel Corporation. All rights reserved
+  This software and associated documentation (if any) is furnished
+  under a license and may only be used or copied in accordance
+  with the terms of the license. Except as permitted by such
+  license, no part of this software or documentation may be
+  reproduced, stored in a retrieval system, or transmitted in any
+  form or by any means without the express written consent of
+  Intel Corporation.
+
+  This file contains a 'Sample Driver' and is licensed as such
+  under the terms of your license agreement with Intel or your
+  vendor.  This file may be modified by the user, subject to
+  the additional terms of the license agreement
+**/
+
+///
+/// External include files do NOT need to be explicitly specified in real EDKII
+/// environment
+///
+#if !defined(EDK_RELEASE_VERSION) || (EDK_RELEASE_VERSION < 0x00020000)
+#include "EdkIIGlueDxe.h"
+#include "Txt.h"
+#include "TxtDxeLib.h"
+#endif
+
+/**
+  This function gets called before/after run the SCHECK function, intend to avoid platform specific SMIs to interfere in BIOS POST
+  if BIOS SMM MP services or synchonization code is not well considered that some of APs are not waken up from Wait-for-SIPI state.
+  Function should preserve original SMI enabling setting in augument is TRUE, and then restore it in augurment is FALSE.
+  The caller is DisableSmiSources() in TxtDxeLib.c
+
+  @param[in] TxtDxeCtx        - Point to TXT_DXE_LIB_CONTEXT structure
+  @param[in] Operation        = TRUE    - Calling before SCHECK to saved and disable platform specific SMIs setting
+                   = FALSE   - Calling after SCHECK to restore platform specific SMIs setting
+
+  @retval EFI_SUCCESS   - Always.
+
+  **/
+EFI_STATUS
+EFIAPI
+TxtDxeOemDisableSmi (
+  IN TXT_DXE_LIB_CONTEXT *TxtDxeCtx,
+  IN BOOLEAN             Operation
+  )
+{
+  static UINT16 SavedSmiControlDev29;
+  static UINT16 SavedSmiControlDev26;
+
+  if (Operation == TRUE) {
+    ///
+    /// Save and disable OEM/Platform specific SMIs
+    ///
+    /// Disable EHCI SMIs before giving control to TXT ACM. EHCI controller generating SMI during TXT ACM results in USB kbd issue
+    ///
+    SavedSmiControlDev26  = MmioRead16 (MmPciAddress (0, 0, 0, 0x1A, 0x6C));
+    SavedSmiControlDev29  = MmioRead16 (MmPciAddress (0, 0, 0, 0x1D, 0x6C));
+
+    MmioWrite16 (MmPciAddress (0, 0, 0, 0x1A, 0x6C), 0);
+    MmioWrite16 (MmPciAddress (0, 0, 0, 0x1D, 0x6C), 0);
+  } else {
+    ///
+    /// Restore or re-enable OEM/Platform specific SMIs
+    ///
+    /// Enable EHCI SMIs before giving control to TXT ACM.
+    ///
+    MmioWrite16 (MmPciAddress (0, 0, 0, 0x1A, 0x6C), SavedSmiControlDev26);
+    MmioWrite16 (MmPciAddress (0, 0, 0, 0x1D, 0x6C), SavedSmiControlDev29);
+  }
+
+  return EFI_SUCCESS;
+}