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