EdkCompatibilityPkg/Foundation/Library/EdkIIGlueLib/Library/BaseLib/X86GetInterruptState.c

   1 /*++
   2
   3 Copyright (c) 2004 - 2006, Intel Corporation. All rights reserved.<BR>
   4 This program and the accompanying materials
   5 are licensed and made available under the terms and conditions of the BSD License
   6 which accompanies this distribution.  The full text of the license may be found at
   7 http://opensource.org/licenses/bsd-license.php
   8
   9 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  10 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  11
  12
  13 Module Name:
  14
  15   x86GetInterruptState.c
  16
  17 Abstract:
  18
  19   IA-32/x64 specific functions.
  20
  21 --*/
  22
  23 #include "BaseLibInternals.h"
  24
  25 /**
  26   Retrieves the current CPU interrupt state.
  27
  28   Retrieves the current CPU interrupt state. Returns TRUE is interrupts are
  29   currently enabled. Otherwise returns FALSE.
  30
  31   @retval TRUE  CPU interrupts are enabled.
  32   @retval FALSE CPU interrupts are disabled.
  33
  34 **/
  35 BOOLEAN
  36 EFIAPI
  37 GlueGetInterruptState (
  38   VOID
  39   )
  40 {
  41   IA32_EFLAGS32                     EFlags;
  42
  43   EFlags.UintN = AsmReadEflags ();
  44   return (BOOLEAN)(EFlags.Bits.IF == 1);
  45 }
  46
  47