1 files changed, 68 insertions, 0 deletions
diff --git a/IntelSiliconPkg/Feature/VTd/IntelVTdPmrPei/IntelVTdPmrPei.h b/IntelSiliconPkg/Feature/VTd/IntelVTdPmrPei/IntelVTdPmrPei.h
new file mode 100644
index 0000000000..aa5926a766
--- /dev/null
+++ b/IntelSiliconPkg/Feature/VTd/IntelVTdPmrPei/IntelVTdPmrPei.h
@@ -0,0 +1,68 @@
+/** @file
+  The definition for DMA access Library.
+
+  Copyright (c) 2017, 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
+  which 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.
+
+**/
+
+#ifndef __DMA_ACCESS_LIB_H__
+#define __DMA_ACCESS_LIB_H__
+
+/**
+  Set DMA protected region.
+
+  @param LowMemoryBase      The protected low memory region base.
+  @param LowMemoryLength    The protected low memory region length.
+  @param HighMemoryBase     The protected high memory region base.
+  @param HighMemoryLength   The protected high memory region length.
+
+  @retval EFI_SUCCESS      The DMA protection is set.
+  @retval EFI_UNSUPPORTED  The DMA protection is not set.
+**/
+EFI_STATUS
+SetDmaProtectedRange (
+  IN UINT32        LowMemoryBase,
+  IN UINT32        LowMemoryLength,
+  IN UINT64        HighMemoryBase,
+  IN UINT64        HighMemoryLength
+  );
+
+/**
+  Diable DMA protection.
+
+  @retval DMA protection is disabled.
+**/
+EFI_STATUS
+DisableDmaProtection (
+  VOID
+  );
+
+/**
+  Get protected low memory alignment.
+
+  @return protected low memory alignment.
+**/
+UINT32
+GetLowMemoryAlignment (
+  VOID
+  );
+
+/**
+  Get protected high memory alignment.
+
+  @return protected high memory alignment.
+**/
+UINT64
+GetHighMemoryAlignment (
+  VOID
+  );
+
+#endif
+