MdePkg: Replace BSD License with BSD+Patent License

[mirror_edk2.git] / MdePkg / Library / BaseLib / Cpu.c

/** @file\r
  Base Library CPU Functions for all architectures.\r
\r
  Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR>\r
  SPDX-License-Identifier: BSD-2-Clause-Patent\r
\r
**/\r
\r
#include "BaseLibInternals.h"\r
\r
\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 be 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