UefiCpuPkg/Library/CpuExceptionHandlerLib/PeiCpuException.c

   1 /** @file
   2   CPU exception handler library implementation for PEIM module.
   3
   4 Copyright (c) 2016 - 2017, Intel Corporation. All rights reserved.<BR>
   5 This program and the accompanying materials are licensed and made available under
   6 the terms and conditions of the BSD License that accompanies this distribution.
   7 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 #include <PiPei.h>
  16 #include "CpuExceptionCommon.h"
  17 #include <Library/DebugLib.h>
  18 #include <Library/HobLib.h>
  19 #include <Library/MemoryAllocationLib.h>
  20
  21 CONST UINTN    mDoFarReturnFlag  = 0;
  22
  23 EFI_GUID mCpuExceptrionHandlerLibHobGuid = CPU_EXCEPTION_HANDLER_LIB_HOB_GUID;
  24
  25 /**
  26   Get exception handler data pointer from GUIDed HOb.
  27
  28   @return  pointer to exception handler data.
  29 **/
  30 EXCEPTION_HANDLER_DATA *
  31 GetExceptionHandlerData (
  32   VOID
  33   )
  34 {
  35   EFI_HOB_GUID_TYPE       *GuidHob;
  36   VOID                    *DataInHob;
  37   EXCEPTION_HANDLER_DATA  *ExceptionHandlerData;
  38
  39   ExceptionHandlerData = NULL;
  40   GuidHob = GetFirstGuidHob (&mCpuExceptrionHandlerLibHobGuid);
  41   if (GuidHob != NULL) {
  42     DataInHob = GET_GUID_HOB_DATA (GuidHob);
  43     ExceptionHandlerData = (EXCEPTION_HANDLER_DATA *)(*(UINTN *)DataInHob);
  44   }
  45   ASSERT (ExceptionHandlerData != NULL);
  46   return ExceptionHandlerData;
  47 }
  48
  49 /**
  50   Common exception handler.
  51
  52   @param ExceptionType  Exception type.
  53   @param SystemContext  Pointer to EFI_SYSTEM_CONTEXT.
  54 **/
  55 VOID
  56 EFIAPI
  57 CommonExceptionHandler (
  58   IN EFI_EXCEPTION_TYPE   ExceptionType,
  59   IN EFI_SYSTEM_CONTEXT   SystemContext
  60   )
  61 {
  62   EXCEPTION_HANDLER_DATA  *ExceptionHandlerData;
  63
  64   ExceptionHandlerData = GetExceptionHandlerData ();
  65   CommonExceptionHandlerWorker (ExceptionType, SystemContext, ExceptionHandlerData);
  66 }
  67
  68 /**
  69   Initializes all CPU exceptions entries and provides the default exception handlers.
  70
  71   Caller should try to get an array of interrupt and/or exception vectors that are in use and need to
  72   persist by EFI_VECTOR_HANDOFF_INFO defined in PI 1.3 specification.
  73   If caller cannot get reserved vector list or it does not exists, set VectorInfo to NULL.
  74   If VectorInfo is not NULL, the exception vectors will be initialized per vector attribute accordingly.
  75   Note: Before invoking this API, caller must allocate memory for IDT table and load
  76         IDTR by AsmWriteIdtr().
  77
  78   @param[in]  VectorInfo    Pointer to reserved vector list.
  79
  80   @retval EFI_SUCCESS           CPU Exception Entries have been successfully initialized
  81                                 with default exception handlers.
  82   @retval EFI_INVALID_PARAMETER VectorInfo includes the invalid content if VectorInfo is not NULL.
  83   @retval EFI_UNSUPPORTED       This function is not supported.
  84
  85 **/
  86 EFI_STATUS
  87 EFIAPI
  88 InitializeCpuExceptionHandlers (
  89   IN EFI_VECTOR_HANDOFF_INFO       *VectorInfo OPTIONAL
  90   )
  91 {
  92   EFI_STATUS                       Status;
  93   EXCEPTION_HANDLER_DATA           *ExceptionHandlerData;
  94   RESERVED_VECTORS_DATA            *ReservedVectors;
  95
  96   ReservedVectors = AllocatePool (sizeof (RESERVED_VECTORS_DATA) * CPU_EXCEPTION_NUM);
  97   ASSERT (ReservedVectors != NULL);
  98
  99   ExceptionHandlerData = AllocatePool (sizeof (EXCEPTION_HANDLER_DATA));
 100   ASSERT (ExceptionHandlerData != NULL);
 101   ExceptionHandlerData->ReservedVectors          = ReservedVectors;
 102   ExceptionHandlerData->ExternalInterruptHandler = NULL;
 103   InitializeSpinLock (&ExceptionHandlerData->DisplayMessageSpinLock);
 104
 105   Status = InitializeCpuExceptionHandlersWorker (VectorInfo, ExceptionHandlerData);
 106   if (EFI_ERROR (Status)) {
 107     FreePool (ReservedVectors);
 108     FreePool (ExceptionHandlerData);
 109     return Status;
 110   }
 111
 112   //
 113   // Build location of CPU MP DATA buffer in HOB
 114   //
 115   BuildGuidDataHob (
 116     &mCpuExceptrionHandlerLibHobGuid,
 117     (VOID *)&ExceptionHandlerData,
 118     sizeof(UINT64)
 119     );
 120
 121   return EFI_SUCCESS;
 122 }
 123
 124 /**
 125   Initializes all CPU interrupt/exceptions entries and provides the default interrupt/exception handlers.
 126
 127   Caller should try to get an array of interrupt and/or exception vectors that are in use and need to
 128   persist by EFI_VECTOR_HANDOFF_INFO defined in PI 1.3 specification.
 129   If caller cannot get reserved vector list or it does not exists, set VectorInfo to NULL.
 130   If VectorInfo is not NULL, the exception vectors will be initialized per vector attribute accordingly.
 131
 132   @param[in]  VectorInfo    Pointer to reserved vector list.
 133
 134   @retval EFI_SUCCESS           All CPU interrupt/exception entries have been successfully initialized
 135                                 with default interrupt/exception handlers.
 136   @retval EFI_INVALID_PARAMETER VectorInfo includes the invalid content if VectorInfo is not NULL.
 137   @retval EFI_UNSUPPORTED       This function is not supported.
 138
 139 **/
 140 EFI_STATUS
 141 EFIAPI
 142 InitializeCpuInterruptHandlers (
 143   IN EFI_VECTOR_HANDOFF_INFO       *VectorInfo OPTIONAL
 144   )
 145 {
 146   return EFI_UNSUPPORTED;
 147 }
 148
 149 /**
 150   Registers a function to be called from the processor interrupt handler.
 151
 152   This function registers and enables the handler specified by InterruptHandler for a processor
 153   interrupt or exception type specified by InterruptType. If InterruptHandler is NULL, then the
 154   handler for the processor interrupt or exception type specified by InterruptType is uninstalled.
 155   The installed handler is called once for each processor interrupt or exception.
 156   NOTE: This function should be invoked after InitializeCpuExceptionHandlers() or
 157   InitializeCpuInterruptHandlers() invoked, otherwise EFI_UNSUPPORTED returned.
 158
 159   @param[in]  InterruptType     Defines which interrupt or exception to hook.
 160   @param[in]  InterruptHandler  A pointer to a function of type EFI_CPU_INTERRUPT_HANDLER that is called
 161                                 when a processor interrupt occurs. If this parameter is NULL, then the handler
 162                                 will be uninstalled.
 163
 164   @retval EFI_SUCCESS           The handler for the processor interrupt was successfully installed or uninstalled.
 165   @retval EFI_ALREADY_STARTED   InterruptHandler is not NULL, and a handler for InterruptType was
 166                                 previously installed.
 167   @retval EFI_INVALID_PARAMETER InterruptHandler is NULL, and a handler for InterruptType was not
 168                                 previously installed.
 169   @retval EFI_UNSUPPORTED       The interrupt specified by InterruptType is not supported,
 170                                 or this function is not supported.
 171 **/
 172 EFI_STATUS
 173 EFIAPI
 174 RegisterCpuInterruptHandler (
 175   IN EFI_EXCEPTION_TYPE            InterruptType,
 176   IN EFI_CPU_INTERRUPT_HANDLER     InterruptHandler
 177   )
 178 {
 179   return EFI_UNSUPPORTED;
 180 }