[PATCH] MdePkg/Hpet: Add Event Timer Block ID definition.

["Marvin Häuser" <Marvin.Haeuser@outlook.com>]

This patch adds the HPET Event Timer Block ID definition that can be
found in the IA-PC HPET Specification, section 3.2.4.

Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Marvin Haeuser <Marvin.Haeuser@outlook.com>
---
 MdePkg/Include/IndustryStandard/HighPrecisionEventTimerTable.h | 18 +++++++++++++++++-
 1 file changed, 17 insertions(+), 1 deletion(-)

diff --git a/MdePkg/Include/IndustryStandard/HighPrecisionEventTimerTable.h b/MdePkg/Include/IndustryStandard/HighPrecisionEventTimerTable.h
index 0d83cd5335de..926445233944 100644
--- a/MdePkg/Include/IndustryStandard/HighPrecisionEventTimerTable.h
+++ b/MdePkg/Include/IndustryStandard/HighPrecisionEventTimerTable.h
@@ -2,7 +2,7 @@
   ACPI high precision event timer table definition, at www.intel.com
   Specification name is IA-PC HPET (High Precision Event Timers) Specification.
     
-  Copyright (c) 2007 - 2008, Intel Corporation. All rights reserved.<BR>
+  Copyright (c) 2007 - 2018, 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        
@@ -22,6 +22,22 @@
 //
 #pragma pack(1)
 
+///
+/// HPET Event Timer Block ID described in IA-PC HPET Specification, 3.2.4.
+///
+typedef union {
+  struct {
+    UINT32 Revision       : 8;
+    UINT32 NumberOfTimers : 5;
+    UINT32 CounterSize    : 1;
+    UINT32 Reserved       : 1;
+    UINT32 LegacyRoute    : 1;
+    UINT32 VendorId       : 16;
+  }      Bits;
+  UINT32 Uint32;
+} EFI_ACPI_HIGH_PRECISION_EVENT_TIMER_BLOCK_ID;
+
+
 ///
 /// High Precision Event Timer Table header definition.
 ///
-- 
2.17.0.windows.1