MdePkg/Include/Library/CpuLib.h

   1 /** @file
   2   Library that provides processor specific library services
   3
   4   Copyright (c) 2006, Intel Corporation
   5   All rights reserved. This program and the accompanying materials
   6   are licensed and made available under the terms and conditions of the BSD License
   7   which accompanies this distribution.  The full text of the license may be found at
   8   http://opensource.org/licenses/bsd-license.php
   9
  10   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  11   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  12
  13 **/
  14
  15 #ifndef __CPU_LIB_H__
  16 #define __CPU_LIB_H__
  17
  18 /**
  19   Places the CPU in a sleep state until an interrupt is received.
  20
  21   Places the CPU in a sleep state until an interrupt is received. If interrupts
  22   are disabled prior to calling this function, then the CPU will be placed in a
  23   sleep state indefinitely.
  24
  25 **/
  26 VOID
  27 EFIAPI
  28 CpuSleep (
  29   VOID
  30   );
  31
  32
  33 /**
  34   Requests CPU to pause for a short period of time.
  35
  36   Requests CPU to pause for a short period of time. Typically used in MP
  37   systems to prevent memory starvation while waiting for a spin lock.
  38
  39 **/
  40 VOID
  41 EFIAPI
  42 CpuPause (
  43   VOID
  44   );
  45
  46
  47 /**
  48   Flushes all the Translation Lookaside Buffers(TLB) entries in a CPU.
  49
  50   Flushes all the Translation Lookaside Buffers(TLB) entries in a CPU.
  51
  52 **/
  53 VOID
  54 EFIAPI
  55 CpuFlushTlb (
  56   VOID
  57   );
  58
  59
  60 #endif