MdePkg/Library/BaseLib/Ipf/CpuBreakpointMsc.c

   1 /** @file
   2   Base Library CPU functions for Itanium
   3
   4   Copyright (c) 2006, Intel Corporation<BR>
   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 //
  16 // Include common header file for this module.
  17 //
  18 #include <BaseLibInternals.h>
  19
  20 #pragma intrinsic (_enable)
  21 #pragma intrinsic (_disable)
  22 #pragma intrinsic (__break)
  23 #pragma intrinsic (__mfa)
  24
  25 /**
  26   Generates a breakpoint on the CPU.
  27
  28   Generates a breakpoint on the CPU. The breakpoint must be implemented such
  29   that code can resume normal execution after the breakpoint.
  30
  31 **/
  32 VOID
  33 EFIAPI
  34 CpuBreakpoint (
  35   VOID
  36   )
  37 {
  38   __break (0);
  39 }
  40
  41 /**
  42   Used to serialize load and store operations.
  43
  44   All loads and stores that proceed calls to this function are guaranteed to be
  45   globally visible when this function returns.
  46
  47 **/
  48 VOID
  49 EFIAPI
  50 MemoryFence (
  51   VOID
  52   )
  53 {
  54   __mfa ();
  55 }
  56
  57 /**
  58   Disables CPU interrupts.
  59
  60   Disables CPU interrupts.
  61
  62 **/
  63 VOID
  64 EFIAPI
  65 DisableInterrupts (
  66   VOID
  67   )
  68 {
  69   _disable ();
  70 }
  71
  72 /**
  73   Enables CPU interrupts.
  74
  75   Enables CPU interrupts.
  76
  77 **/
  78 VOID
  79 EFIAPI
  80 EnableInterrupts (
  81   VOID
  82   )
  83 {
  84   _enable ();
  85 }
  86
  87 /**
  88   Enables CPU interrupts for the smallest window required to capture any
  89   pending interrupts.
  90
  91   Enables CPU interrupts for the smallest window required to capture any
  92   pending interrupts.
  93
  94 **/
  95 VOID
  96 EFIAPI
  97 EnableDisableInterrupts (
  98   VOID
  99   )
 100 {
 101   EnableInterrupts ();
 102   DisableInterrupts ();
 103 }
 104