1 files changed, 83 insertions, 0 deletions
diff --git a/Vlv2TbltDevicePkg/PlatformDxe/ExI.c b/Vlv2TbltDevicePkg/PlatformDxe/ExI.c
new file mode 100644
index 0000000000..2dad89f606
--- /dev/null
+++ b/Vlv2TbltDevicePkg/PlatformDxe/ExI.c
@@ -0,0 +1,83 @@
+/** @file
+
+  Copyright (c) 2004  - 2014, Intel Corporation. All rights reserved.<BR>
+                                                                                   
+  This program and the accompanying materials are licensed and made available under
+  the terms and conditions of the BSD License that accompanies this distribution.  
+  The full text of the license may be found at                                     
+  http://opensource.org/licenses/bsd-license.php.                                  
+                                                                                   
+  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,            
+  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.    
+                                                                                   
+
+Module Name:
+
+
+  ExI.c
+
+Abstract:
+
+  ExI configuration based on setup option
+
+
+--*/
+
+
+#include "PlatformDxe.h"
+
+#define PchLpcPciCfg32(Register)  MmioRead32 (MmPciAddress (0, DEFAULT_PCI_BUS_NUMBER_PCH, PCI_DEVICE_NUMBER_PCH_LPC, 0, Register))
+
+//
+// Procedure: GetPmcBase
+//
+// Description: This function read content of B:D:F 0:31:0, offset 44h (for
+// PmcBase)
+//
+// Input: None
+//
+// Output:  32 bit PmcBase
+//
+UINT32
+GetPmcBase (
+  VOID
+  )
+{
+  return (PchLpcPciCfg32 (R_PCH_LPC_PMC_BASE) & B_PCH_LPC_PMC_BASE_BAR);
+}
+
+/**
+  Configure ExI.
+
+  @param ImageHandle    Pointer to the loaded image protocol for this driver
+  @param SystemTable    Pointer to the EFI System Table
+
+  @retval EFI_SUCCESS   The driver initializes correctly.
+**/
+VOID
+InitExI (
+  )
+{
+  EFI_STATUS                  Status;
+
+  SYSTEM_CONFIGURATION          SystemConfiguration;
+  UINTN       VarSize;
+
+  VarSize = sizeof(SYSTEM_CONFIGURATION);
+
+  Status = gRT->GetVariable(
+                  L"Setup",
+                  &gEfiNormalSetupGuid,
+                  NULL,
+                  &VarSize,
+                  &SystemConfiguration
+                  );
+
+  ASSERT_EFI_ERROR(Status);
+
+  if (SystemConfiguration.ExISupport == 1) {
+	  MmioOr32 ((UINTN) (GetPmcBase() + R_PCH_PMC_MTPMC1), (UINT32) BIT0+BIT1+BIT2);
+  } else if (SystemConfiguration.ExISupport == 0) {
+    MmioAnd32 ((UINTN) (GetPmcBase() + R_PCH_PMC_MTPMC1), ~((UINT32) BIT0+BIT1+BIT2)); //clear bit 0,1,2
+  }
+}