[PATCH 3/6] MdePkg/BaseLib: Implement EnableInterruptsAndSleep

["Gao, Zhichao" <zhichao.gao@intel.com>]

From: Sean Brogan <sean.brogan@microsoft.com>

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=1400

Implement EnableInterruptsAndSleep.

Cc: Michael D Kinney <michael.d.kinney@intel.com>
Cc: Liming Gao <liming.gao@intel.com>
Cc: Sean Brogan <sean.brogan@microsoft.com>
Cc: Michael Turner <Michael.Turner@microsoft.com>
Cc: Bret Barkelew <Bret.Barkelew@microsoft.com>
Signed-off-by: Zhichao Gao <zhichao.gao@intel.com>
---
 MdePkg/Library/BaseLib/Ia32/EnableInterrupts.c | 18 +++++++++++++++++-
 .../Library/BaseLib/Ia32/EnableInterrupts.nasm | 15 ++++++++++++++-
 .../Library/BaseLib/X64/EnableInterrupts.nasm  | 15 ++++++++++++++-
 3 files changed, 45 insertions(+), 3 deletions(-)

diff --git a/MdePkg/Library/BaseLib/Ia32/EnableInterrupts.c b/MdePkg/Library/BaseLib/Ia32/EnableInterrupts.c
index bc03144c42..c2a84342b1 100644
--- a/MdePkg/Library/BaseLib/Ia32/EnableInterrupts.c
+++ b/MdePkg/Library/BaseLib/Ia32/EnableInterrupts.c
@@ -1,7 +1,7 @@
 /** @file
   EnableInterrupts function
 
-  Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>
+  Copyright (c) 2006 - 2019, Intel Corporation. All rights reserved.<BR>
   SPDX-License-Identifier: BSD-2-Clause-Patent
 
 **/
@@ -24,3 +24,19 @@ EnableInterrupts (
   }
 }
 
+/**
+  Enables CPU interrupts and then waits for an interrupt to arrive.
+
+**/
+VOID
+EFIAPI
+EnableInterruptsAndSleep (
+  VOID
+  )
+{
+  _asm {
+    sti
+    hlt
+  }
+}
+
diff --git a/MdePkg/Library/BaseLib/Ia32/EnableInterrupts.nasm b/MdePkg/Library/BaseLib/Ia32/EnableInterrupts.nasm
index 979e708207..86902f61b6 100644
--- a/MdePkg/Library/BaseLib/Ia32/EnableInterrupts.nasm
+++ b/MdePkg/Library/BaseLib/Ia32/EnableInterrupts.nasm
@@ -1,6 +1,6 @@
 ;------------------------------------------------------------------------------
 ;
-; Copyright (c) 2006 - 2016, Intel Corporation. All rights reserved.<BR>
+; Copyright (c) 2006 - 2019, Intel Corporation. All rights reserved.<BR>
 ; SPDX-License-Identifier: BSD-2-Clause-Patent
 ;
 ; Module Name:
@@ -29,3 +29,16 @@ ASM_PFX(EnableInterrupts):
     sti
     ret
 
+;------------------------------------------------------------------------------
+; VOID
+; EFIAPI
+; EnableInterruptsAndSleep (
+;   VOID
+;   );
+;------------------------------------------------------------------------------
+global ASM_PFX(EnableInterruptsAndSleep)
+ASM_PFX(EnableInterruptsAndSleep):
+    sti
+    hlt
+    ret
+
diff --git a/MdePkg/Library/BaseLib/X64/EnableInterrupts.nasm b/MdePkg/Library/BaseLib/X64/EnableInterrupts.nasm
index 6057afd626..de8f2ad434 100644
--- a/MdePkg/Library/BaseLib/X64/EnableInterrupts.nasm
+++ b/MdePkg/Library/BaseLib/X64/EnableInterrupts.nasm
@@ -1,6 +1,6 @@
 ;------------------------------------------------------------------------------
 ;
-; Copyright (c) 2006, Intel Corporation. All rights reserved.<BR>
+; Copyright (c) 2006 - 2019, Intel Corporation. All rights reserved.<BR>
 ; SPDX-License-Identifier: BSD-2-Clause-Patent
 ;
 ; Module Name:
@@ -30,3 +30,16 @@ ASM_PFX(EnableInterrupts):
     sti
     ret
 
+;------------------------------------------------------------------------------
+; VOID
+; EFIAPI
+; EnableInterruptsAndSleep (
+;   VOID
+;   );
+;------------------------------------------------------------------------------
+global ASM_PFX(EnableInterruptsAndSleep)
+ASM_PFX(EnableInterruptsAndSleep):
+    sti
+    hlt
+    ret
+
-- 
2.21.0.windows.1