MdeModulePkg/Library/CpuExceptionHandlerLibNull/CpuExceptionHandlerLibNull.c

   1 /** @file
   2   CPU Exception Handler library implementition with empty functions.
   3
   4   Copyright (c) 2012 - 2016, Intel Corporation. All rights reserved.<BR>
   5   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 #include <PiPei.h>
  15 #include <Library/CpuExceptionHandlerLib.h>
  16
  17 /**
  18   Initializes all CPU exceptions entries and provides the default exception handlers.
  19
  20   Caller should try to get an array of interrupt and/or exception vectors that are in use and need to
  21   persist by EFI_VECTOR_HANDOFF_INFO defined in PI 1.3 specification.
  22   If caller cannot get reserved vector list or it does not exists, set VectorInfo to NULL.
  23   If VectorInfo is not NULL, the exception vectors will be initialized per vector attribute accordingly.
  24
  25   @param[in]  VectorInfo    Pointer to reserved vector list.
  26
  27   @retval EFI_SUCCESS           CPU Exception Entries have been successfully initialized
  28                                 with default exception handlers.
  29   @retval EFI_INVALID_PARAMETER VectorInfo includes the invalid content if VectorInfo is not NULL.
  30   @retval EFI_UNSUPPORTED       This function is not supported.
  31
  32 **/
  33 EFI_STATUS
  34 EFIAPI
  35 InitializeCpuExceptionHandlers (
  36   IN EFI_VECTOR_HANDOFF_INFO       *VectorInfo OPTIONAL
  37   )
  38 {
  39   return EFI_SUCCESS;
  40 }
  41
  42 /**
  43   Initializes all CPU interrupt/exceptions entries and provides the default interrupt/exception handlers.
  44
  45   Caller should try to get an array of interrupt and/or exception vectors that are in use and need to
  46   persist by EFI_VECTOR_HANDOFF_INFO defined in PI 1.3 specification.
  47   If caller cannot get reserved vector list or it does not exists, set VectorInfo to NULL.
  48   If VectorInfo is not NULL, the exception vectors will be initialized per vector attribute accordingly.
  49
  50   @param[in]  VectorInfo    Pointer to reserved vector list.
  51
  52   @retval EFI_SUCCESS           All CPU interrupt/exception entries have been successfully initialized
  53                                 with default interrupt/exception handlers.
  54   @retval EFI_INVALID_PARAMETER VectorInfo includes the invalid content if VectorInfo is not NULL.
  55   @retval EFI_UNSUPPORTED       This function is not supported.
  56
  57 **/
  58 EFI_STATUS
  59 EFIAPI
  60 InitializeCpuInterruptHandlers (
  61   IN EFI_VECTOR_HANDOFF_INFO       *VectorInfo OPTIONAL
  62   )
  63 {
  64   return EFI_SUCCESS;
  65 }
  66
  67 /**
  68   Registers a function to be called from the processor interrupt handler.
  69
  70   This function registers and enables the handler specified by InterruptHandler for a processor
  71   interrupt or exception type specified by InterruptType. If InterruptHandler is NULL, then the
  72   handler for the processor interrupt or exception type specified by InterruptType is uninstalled.
  73   The installed handler is called once for each processor interrupt or exception.
  74   NOTE: This function should be invoked after InitializeCpuExceptionHandlers() or
  75   InitializeCpuInterruptHandlers() invoked, otherwise EFI_UNSUPPORTED returned.
  76
  77   @param[in]  InterruptType     Defines which interrupt or exception to hook.
  78   @param[in]  InterruptHandler  A pointer to a function of type EFI_CPU_INTERRUPT_HANDLER that is called
  79                                 when a processor interrupt occurs. If this parameter is NULL, then the handler
  80                                 will be uninstalled.
  81
  82   @retval EFI_SUCCESS           The handler for the processor interrupt was successfully installed or uninstalled.
  83   @retval EFI_ALREADY_STARTED   InterruptHandler is not NULL, and a handler for InterruptType was
  84                                 previously installed.
  85   @retval EFI_INVALID_PARAMETER InterruptHandler is NULL, and a handler for InterruptType was not
  86                                 previously installed.
  87   @retval EFI_UNSUPPORTED       The interrupt specified by InterruptType is not supported,
  88                                 or this function is not supported.
  89 **/
  90 EFI_STATUS
  91 EFIAPI
  92 RegisterCpuInterruptHandler (
  93   IN EFI_EXCEPTION_TYPE            InterruptType,
  94   IN EFI_CPU_INTERRUPT_HANDLER     InterruptHandler
  95   )
  96 {
  97   return EFI_UNSUPPORTED;
  98 }
  99