Add in the 1st version of ECP.

[mirror_edk2.git] / EdkCompatibilityPkg / Foundation / Library / EdkIIGlueLib / Library / BaseLib / Cpu.c

/*++\r
\r
Copyright (c) 2004 - 2006, Intel Corporation                                                         \r
All rights reserved. This program and the accompanying materials                          \r
are licensed and made available under the terms and conditions of the BSD License         \r
which accompanies this distribution.  The full text of the license may be found at        \r
http://opensource.org/licenses/bsd-license.php                                            \r
                                                                                          \r
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,                     \r
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.  \r
\r
\r
Module Name:\r
\r
  Cpu.c\r
  \r
Abstract: \r
\r
  Base Library CPU Functions for all architectures.\r
\r
--*/\r
\r
#include "BaseLibInternal.h"\r
\r
/**\r
  Disables CPU interrupts and returns the interrupt state prior to the disable\r
  operation.\r
\r
  Disables CPU interrupts and returns the interrupt state prior to the disable\r
  operation.\r
\r
  @retval TRUE  CPU interrupts were enabled on entry to this call.\r
  @retval FALSE CPU interrupts were disabled on entry to this call.\r
\r
**/\r
BOOLEAN\r
EFIAPI\r
SaveAndDisableInterrupts (\r
  VOID\r
  )\r
{\r
  BOOLEAN                           InterruptState;\r
\r
  InterruptState = GetInterruptState ();\r
  DisableInterrupts ();\r
  return InterruptState;\r
}\r
\r
/**\r
  Set the current CPU interrupt state.\r
\r
  Sets the current CPU interrupt state to the state specified by\r
  InterruptState. If InterruptState is TRUE, then interrupts are enabled. If\r
  InterruptState is FALSE, then interrupts are disabled. InterruptState is\r
  returned.\r
\r
  @param  InterruptState  TRUE if interrupts should enabled. FALSE if\r
                          interrupts should be disabled.\r
\r
  @return InterruptState\r
\r
**/\r
BOOLEAN\r
EFIAPI\r
SetInterruptState (\r
  IN      BOOLEAN                   InterruptState\r
  )\r
{\r
  if (InterruptState) {\r
    EnableInterrupts ();\r
  } else {\r
    DisableInterrupts ();\r
  }\r
  return InterruptState;\r
}\r