EdkCompatibilityPkg/Foundation/Library/EdkIIGlueLib/Library/BaseLib/Ipf/CpuBreakpoint.c

   1 /*++
   2
   3 Copyright (c) 2004 - 2006, Intel Corporation. All rights reserved.<BR>
   4 This program and the accompanying materials
   5 are licensed and made available under the terms and conditions of the BSD License
   6 which accompanies this distribution.  The full text of the license may be found at
   7 http://opensource.org/licenses/bsd-license.php
   8
   9 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  10 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  11
  12
  13 Module Name:
  14
  15   CpuBreakpint.c
  16
  17 Abstract:
  18
  19 --*/
  20
  21 #include "BaseLibInternals.h"
  22
  23 //void __mfa (void);
  24
  25 #pragma intrinsic (_enable)
  26 #pragma intrinsic (_disable)
  27 #pragma intrinsic (__break)
  28 #pragma intrinsic (__mfa)
  29
  30
  31 /**
  32   Generates a breakpoint on the CPU.
  33
  34   Generates a breakpoint on the CPU. The breakpoint must be implemented such
  35   that code can resume normal execution after the breakpoint.
  36
  37 **/
  38 VOID
  39 EFIAPI
  40 CpuBreakpoint (
  41   VOID
  42   )
  43 {
  44   __break (0);
  45 }
  46
  47 /**
  48   Used to serialize load and store operations.
  49
  50   All loads and stores that proceed calls to this function are guaranteed to be
  51   globally visible when this function returns.
  52
  53 **/
  54 VOID
  55 EFIAPI
  56 MemoryFence (
  57   VOID
  58   )
  59 {
  60   __mfa ();
  61 }
  62
  63 /**
  64   Disables CPU interrupts.
  65
  66   Disables CPU interrupts.
  67
  68 **/
  69 VOID
  70 EFIAPI
  71 DisableInterrupts (
  72   VOID
  73   )
  74 {
  75   _disable ();
  76 }
  77
  78 /**
  79   Enables CPU interrupts.
  80
  81   Enables CPU interrupts.
  82
  83 **/
  84 VOID
  85 EFIAPI
  86 EnableInterrupts (
  87   VOID
  88   )
  89 {
  90   _enable ();
  91 }
  92
  93 /**
  94   Enables CPU interrupts for the smallest window required to capture any
  95   pending interrupts.
  96
  97   Enables CPU interrupts for the smallest window required to capture any
  98   pending interrupts.
  99
 100 **/
 101 VOID
 102 EFIAPI
 103 EnableDisableInterrupts (
 104   VOID
 105   )
 106 {
 107   EnableInterrupts ();
 108   DisableInterrupts ();
 109 }
 110
 111 /**
 112   Places the CPU in a sleep state until an interrupt is received.
 113
 114   Places the CPU in a sleep state until an interrupt is received. If interrupts
 115   are disabled prior to calling this function, then the CPU will be placed in a
 116   sleep state indefinitely.
 117
 118 **/
 119 VOID
 120 EFIAPI
 121 CpuSleep (
 122   VOID
 123   )
 124 {
 125   PalCallStatic (NULL, 29, 0, 0, 0);
 126 }