MdePkg/Library/BaseLib/Ipf/CpuBreakpoint.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 "BaseLibInternals.h"
  17
  18 /**
  19   Generates a breakpoint on the CPU.
  20
  21   Generates a breakpoint on the CPU. The breakpoint must be implemented such
  22   that code can resume normal execution after the breakpoint.
  23
  24 **/
  25 VOID
  26 EFIAPI
  27 CpuBreakpoint (
  28   VOID
  29   )
  30 {
  31   __break (0);
  32 }
  33
  34 /**
  35   Used to serialize load and store operations.
  36
  37   All loads and stores that proceed calls to this function are guaranteed to be
  38   globally visible when this function returns.
  39
  40 **/
  41 VOID
  42 EFIAPI
  43 MemoryFence (
  44   VOID
  45   )
  46 {
  47   __mfa ();
  48 }
  49
  50 /**
  51   Disables CPU interrupts.
  52
  53   Disables CPU interrupts.
  54
  55 **/
  56 VOID
  57 EFIAPI
  58 DisableInterrupts (
  59   VOID
  60   )
  61 {
  62   _disable ();
  63 }
  64
  65 /**
  66   Enables CPU interrupts.
  67
  68   Enables CPU interrupts.
  69
  70 **/
  71 VOID
  72 EFIAPI
  73 EnableInterrupts (
  74   VOID
  75   )
  76 {
  77   _enable ();
  78 }
  79
  80 /**
  81   Enables CPU interrupts for the smallest window required to capture any
  82   pending interrupts.
  83
  84   Enables CPU interrupts for the smallest window required to capture any
  85   pending interrupts.
  86
  87 **/
  88 VOID
  89 EFIAPI
  90 EnableDisableInterrupts (
  91   VOID
  92   )
  93 {
  94   EnableInterrupts ();
  95   DisableInterrupts ();
  96 }