UefiCpuPkg: Move AsmRelocateApLoopStart from Mpfuncs.nasm to AmdSev.nasm

[mirror_edk2.git] / MdePkg / Library / BaseLib / Ebc / CpuBreakpoint.c

/** @file\r
  Base Library CPU Functions for EBC\r
\r
  Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR>\r
  SPDX-License-Identifier: BSD-2-Clause-Patent\r
\r
**/\r
\r
#include "BaseLibInternals.h"\r
\r
extern\r
UINT64\r
_break (\r
  CHAR8  BreakCode\r
  );\r
\r
/**\r
  Generates a breakpoint on the CPU.\r
\r
  Generates a breakpoint on the CPU. The breakpoint must be implemented such\r
  that code can resume normal execution after the breakpoint.\r
\r
**/\r
VOID\r
EFIAPI\r
CpuBreakpoint (\r
  VOID\r
  )\r
{\r
  _break (3);\r
}\r
\r
/**\r
  Used to serialize load and store operations.\r
\r
  All loads and stores that proceed calls to this function are guaranteed to be\r
  globally visible when this function returns.\r
\r
**/\r
VOID\r
EFIAPI\r
MemoryFence (\r
  VOID\r
  )\r
{\r
}\r
\r
/**\r
  Disables CPU interrupts.\r
\r
**/\r
VOID\r
EFIAPI\r
DisableInterrupts (\r
  VOID\r
  )\r
{\r
  ASSERT (FALSE);\r
}\r
\r
/**\r
  Enables CPU interrupts.\r
\r
**/\r
VOID\r
EFIAPI\r
EnableInterrupts (\r
  VOID\r
  )\r
{\r
  ASSERT (FALSE);\r
}\r
\r
/**\r
  Retrieves the current CPU interrupt state.\r
\r
  Returns TRUE means interrupts are currently enabled. Otherwise,\r
  returns FALSE.\r
\r
  @retval TRUE  CPU interrupts are enabled.\r
  @retval FALSE CPU interrupts are disabled.\r
\r
**/\r
BOOLEAN\r
EFIAPI\r
GetInterruptState (\r
  VOID\r
  )\r
{\r
  ASSERT (FALSE);\r
  return FALSE;\r
}\r
\r
/**\r
  Enables CPU interrupts for the smallest window required to capture any\r
  pending interrupts.\r
\r
**/\r
VOID\r
EFIAPI\r
EnableDisableInterrupts (\r
  VOID\r
  )\r
{\r
  EnableInterrupts ();\r
  DisableInterrupts ();\r
}\r
\r
/**\r
  Requests CPU to pause for a short period of time.\r
\r
  Requests CPU to pause for a short period of time. Typically used in MP\r
  systems to prevent memory starvation while waiting for a spin lock.\r
\r
**/\r
VOID\r
EFIAPI\r
CpuPause (\r
  VOID\r
  )\r
{\r
}\r