MdePkg/Library/BaseLib/Ebc/CpuBreakpoint.c

   1 /** @file
   2   Base Library CPU Functions for EBC
   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 extern
  16 UINT64
  17 _break (
  18   CHAR8 BreakCode
  19   );
  20
  21 /**
  22   Generates a breakpoint on the CPU.
  23
  24   Generates a breakpoint on the CPU. The breakpoint must be implemented such
  25   that code can resume normal execution after the breakpoint.
  26
  27 **/
  28 VOID
  29 EFIAPI
  30 CpuBreakpoint (
  31   VOID
  32   )
  33 {
  34   _break (3);
  35 }
  36
  37 /**
  38   Used to serialize load and store operations.
  39
  40   All loads and stores that proceed calls to this function are guaranteed to be
  41   globally visible when this function returns.
  42
  43 **/
  44 VOID
  45 EFIAPI
  46 MemoryFence (
  47   VOID
  48   )
  49 {
  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   ASSERT (FALSE);
  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   ASSERT (FALSE);
  80 }
  81
  82 /**
  83   Retrieves the current CPU interrupt state.
  84
  85   Retrieves the current CPU interrupt state. Returns TRUE is interrupts are
  86   currently enabled. Otherwise returns FALSE.
  87
  88   @retval TRUE  CPU interrupts are enabled.
  89   @retval FALSE CPU interrupts are disabled.
  90
  91 **/
  92 BOOLEAN
  93 EFIAPI
  94 GetInterruptState (
  95   VOID
  96   )
  97 {
  98   ASSERT (FALSE);
  99   return FALSE;
 100 }