[mirror_edk2.git] / UefiCpuPkg / Library / CpuExceptionHandlerLib / PeiDxeSmmCpuException.c

/** @file\r
  CPU Exception Library provides PEI/DXE/SMM CPU common exception handler.\r
\r
Copyright (c) 2012 - 2016, Intel Corporation. All rights reserved.<BR>\r
This program and the accompanying materials are licensed and made available under\r
the terms and conditions of the BSD License that accompanies this distribution.\r
The full text of the license may be found at\r
http://opensource.org/licenses/bsd-license.php.\r
\r
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
\r
**/\r
\r
#include "CpuExceptionCommon.h"\r
#include <Library/DebugLib.h>\r
\r
//\r
// Spinlock for CPU information display\r
//\r
SPIN_LOCK        mDisplayMessageSpinLock;\r
\r
//\r
// Image align size for DXE/SMM\r
//\r
CONST UINTN      mImageAlignSize = SIZE_4KB;\r
\r
RESERVED_VECTORS_DATA       mReservedVectorsData[CPU_EXCEPTION_NUM];\r
EFI_CPU_INTERRUPT_HANDLER   mExternalInterruptHandlerTable[CPU_EXCEPTION_NUM];\r
EFI_CPU_INTERRUPT_HANDLER   *mExternalInterruptHandler = NULL;\r
UINTN                       mEnabledInterruptNum = 0;\r
\r
/**\r
  Common exception handler.\r
\r
  @param ExceptionType  Exception type.\r
  @param SystemContext  Pointer to EFI_SYSTEM_CONTEXT.\r
**/\r
VOID\r
EFIAPI\r
CommonExceptionHandler (\r
  IN EFI_EXCEPTION_TYPE          ExceptionType, \r
  IN EFI_SYSTEM_CONTEXT          SystemContext\r
  )\r
{\r
  EXCEPTION_HANDLER_CONTEXT      *ExceptionHandlerContext;\r
\r
  ExceptionHandlerContext = (EXCEPTION_HANDLER_CONTEXT *) (UINTN) (SystemContext.SystemContextIa32);\r
\r
  switch (mReservedVectors[ExceptionType].Attribute) {\r
  case EFI_VECTOR_HANDOFF_HOOK_BEFORE:\r
    //\r
    // Need to jmp to old IDT handler after this exception handler\r
    //\r
    ExceptionHandlerContext->ExceptionDataFlag = (mErrorCodeFlag & (1 << ExceptionType)) ? TRUE : FALSE;\r
    ExceptionHandlerContext->OldIdtHandler     = mReservedVectors[ExceptionType].ExceptonHandler;\r
    break;\r
  case EFI_VECTOR_HANDOFF_HOOK_AFTER:\r
    while (TRUE) {\r
      //\r
      // If if anyone has gotten SPIN_LOCK for owner running hook after\r
      //\r
      if (AcquireSpinLockOrFail (&mReservedVectors[ExceptionType].SpinLock)) {\r
        //\r
        // Need to execute old IDT handler before running this exception handler\r
        //\r
        mReservedVectors[ExceptionType].ApicId = GetApicId ();\r
        ArchSaveExceptionContext (ExceptionType, SystemContext);\r
        ExceptionHandlerContext->ExceptionDataFlag = (mErrorCodeFlag & (1 << ExceptionType)) ? TRUE : FALSE;\r
        ExceptionHandlerContext->OldIdtHandler     = mReservedVectors[ExceptionType].ExceptonHandler;\r
        return;\r
      }\r
      //\r
      // If failed to acquire SPIN_LOCK, check if it was locked by processor itself\r
      //\r
      if (mReservedVectors[ExceptionType].ApicId == GetApicId ()) {\r
        //\r
        // Old IDT handler has been executed, then retore CPU exception content to\r
        // run new exception handler.\r
        //\r
        ArchRestoreExceptionContext (ExceptionType, SystemContext);\r
        //\r
        // Rlease spin lock for ApicId\r
        //\r
        ReleaseSpinLock (&mReservedVectors[ExceptionType].SpinLock);\r
        break;\r
      }\r
      CpuPause ();\r
    }\r
    break;\r
  case 0xffffffff:\r
    break;\r
  default:\r
    //\r
    // It should never reach here\r
    //\r
    CpuDeadLoop ();\r
    break;\r
  }\r
  \r
  if (mExternalInterruptHandler[ExceptionType] != NULL) {\r
    (mExternalInterruptHandler[ExceptionType]) (ExceptionType, SystemContext);\r
  } else if (ExceptionType < CPU_EXCEPTION_NUM) {\r
    //\r
    // Get Spinlock to display CPU information\r
    //\r
    while (!AcquireSpinLockOrFail (&mDisplayMessageSpinLock)) {\r
      CpuPause ();\r
    }\r
    //\r
    // Display ExceptionType, CPU information and Image information\r
    //  \r
    DumpCpuContent (ExceptionType, SystemContext);\r
    //\r
    // Release Spinlock of output message\r
    //\r
    ReleaseSpinLock (&mDisplayMessageSpinLock);\r
    //\r
    // Enter a dead loop if needn't to execute old IDT handler further\r
    //\r
    if (mReservedVectors[ExceptionType].Attribute != EFI_VECTOR_HANDOFF_HOOK_BEFORE) {\r
      CpuDeadLoop ();\r
    }\r
  }\r
}\r
\r
/**\r
  Internal worker function to update IDT entries accordling to vector attributes.\r
\r
  @param[in] IdtTable       Pointer to IDT table.\r
  @param[in] TemplateMap    Pointer to a buffer where the address map is returned.\r
  @param[in] IdtEntryCount  IDT entries number to be updated.\r
\r
**/\r
VOID\r
UpdateIdtTable (\r
  IN IA32_IDT_GATE_DESCRIPTOR        *IdtTable,\r
  IN EXCEPTION_HANDLER_TEMPLATE_MAP  *TemplateMap,\r
  IN UINTN                           IdtEntryCount\r
  )\r
{\r
  UINT16                             CodeSegment;\r
  UINTN                              Index;\r
  UINTN                              InterruptHandler;\r
\r
  //\r
  // Use current CS as the segment selector of interrupt gate in IDT\r
  //\r
  CodeSegment = AsmReadCs ();\r
\r
  for (Index = 0; Index < IdtEntryCount; Index ++) {\r
    IdtTable[Index].Bits.Selector = CodeSegment;\r
    //\r
    // Check reserved vectors attributes\r
    //\r
    switch (mReservedVectors[Index].Attribute) {\r
    case EFI_VECTOR_HANDOFF_DO_NOT_HOOK:\r
      //\r
      // Keep original IDT entry\r
      //\r
      continue;\r
    case EFI_VECTOR_HANDOFF_HOOK_AFTER:\r
      InitializeSpinLock (&mReservedVectors[Index].SpinLock);\r
      CopyMem (\r
        (VOID *) mReservedVectors[Index].HookAfterStubHeaderCode,\r
        (VOID *) TemplateMap->HookAfterStubHeaderStart,\r
        TemplateMap->ExceptionStubHeaderSize\r
        );\r
      AsmVectorNumFixup (\r
        (VOID *) mReservedVectors[Index].HookAfterStubHeaderCode,\r
        (UINT8) Index,\r
        (VOID *) TemplateMap->HookAfterStubHeaderStart\r
        );\r
      //\r
      // Go on the following code\r
      //\r
    case EFI_VECTOR_HANDOFF_HOOK_BEFORE:\r
      //\r
      // Save original IDT handler address\r
      //\r
      mReservedVectors[Index].ExceptonHandler = ArchGetIdtHandler (&IdtTable[Index]);\r
      //\r
      // Go on the following code\r
      //\r
    default:\r
      //\r
      // Update new IDT entry\r
      //\r
      InterruptHandler = TemplateMap->ExceptionStart + Index * TemplateMap->ExceptionStubHeaderSize;\r
      ArchUpdateIdtEntry (&IdtTable[Index], InterruptHandler);\r
      break;\r
    }\r
  }\r
 \r
  //\r
  // Save Interrupt number to global variable used for RegisterCpuInterruptHandler ()\r
  //\r
  mEnabledInterruptNum = IdtEntryCount;\r
}\r
\r
/**\r
  Internal worker function to initialize exception handler.\r
\r
  @param[in]      VectorInfo            Pointer to reserved vector list.\r
  @param[in, out] ExceptionHandlerData  Pointer to exception handler data.\r
  \r
  @retval EFI_SUCCESS           CPU Exception Entries have been successfully initialized \r
                                with default exception handlers.\r
  @retval EFI_INVALID_PARAMETER VectorInfo includes the invalid content if VectorInfo is not NULL.\r
  @retval EFI_UNSUPPORTED       This function is not supported.\r
\r
**/\r
EFI_STATUS\r
InitializeCpuExceptionHandlersWorker (\r
  IN EFI_VECTOR_HANDOFF_INFO       *VectorInfo OPTIONAL,\r
  IN OUT EXCEPTION_HANDLER_DATA    *ExceptionHandlerData\r
  )\r
{\r
  EFI_STATUS                       Status;\r
  IA32_DESCRIPTOR                  IdtDescriptor;\r
  UINTN                            IdtEntryCount;\r
  EXCEPTION_HANDLER_TEMPLATE_MAP   TemplateMap;\r
  IA32_IDT_GATE_DESCRIPTOR         *IdtTable;\r
  RESERVED_VECTORS_DATA            *ReservedVectors;\r
\r
  ReservedVectors = ExceptionHandlerData->ReservedVectors;\r
  SetMem ((VOID *) ReservedVectors, sizeof (RESERVED_VECTORS_DATA) * CPU_EXCEPTION_NUM, 0xff);\r
  if (VectorInfo != NULL) {\r
    Status = ReadAndVerifyVectorInfo (VectorInfo, ReservedVectors, CPU_EXCEPTION_NUM);\r
    if (EFI_ERROR (Status)) {\r
      return EFI_INVALID_PARAMETER;\r
    }\r
  }\r
  InitializeSpinLock (&mDisplayMessageSpinLock);\r
\r
  mExternalInterruptHandler = mExternalInterruptHandlerTable;\r
  //\r
  // Read IDT descriptor and calculate IDT size\r
  //\r
  AsmReadIdtr (&IdtDescriptor);\r
  IdtEntryCount = (IdtDescriptor.Limit + 1) / sizeof (IA32_IDT_GATE_DESCRIPTOR);\r
  if (IdtEntryCount > CPU_EXCEPTION_NUM) {\r
    //\r
    // CPU exeption library only setup CPU_EXCEPTION_NUM exception handler at most\r
    //\r
    IdtEntryCount = CPU_EXCEPTION_NUM;\r
  }\r
\r
  IdtTable = (IA32_IDT_GATE_DESCRIPTOR *) IdtDescriptor.Base;\r
  AsmGetTemplateAddressMap (&TemplateMap);\r
  ASSERT (TemplateMap.ExceptionStubHeaderSize <= HOOKAFTER_STUB_SIZE);\r
  UpdateIdtTable (IdtTable, &TemplateMap, IdtEntryCount);\r
  mEnabledInterruptNum = IdtEntryCount;\r
  return EFI_SUCCESS;\r
}\r
\r
/**\r
  Registers a function to be called from the processor interrupt handler.\r
\r
  @param[in]  InterruptType     Defines which interrupt or exception to hook.\r
  @param[in]  InterruptHandler  A pointer to a function of type EFI_CPU_INTERRUPT_HANDLER that is called\r
                                when a processor interrupt occurs. If this parameter is NULL, then the handler\r
                                will be uninstalled.\r
\r
  @retval EFI_SUCCESS           The handler for the processor interrupt was successfully installed or uninstalled.\r
  @retval EFI_ALREADY_STARTED   InterruptHandler is not NULL, and a handler for InterruptType was\r
                                previously installed.\r
  @retval EFI_INVALID_PARAMETER InterruptHandler is NULL, and a handler for InterruptType was not\r
                                previously installed.\r
  @retval EFI_UNSUPPORTED       The interrupt specified by InterruptType is not supported,\r
                                or this function is not supported.\r
**/\r
EFI_STATUS\r
RegisterCpuInterruptHandlerWorker (\r
  IN EFI_EXCEPTION_TYPE            InterruptType,\r
  IN EFI_CPU_INTERRUPT_HANDLER     InterruptHandler\r
  )\r
{\r
  if (InterruptType < 0 || InterruptType >= (EFI_EXCEPTION_TYPE)mEnabledInterruptNum ||\r
      mReservedVectors[InterruptType].Attribute == EFI_VECTOR_HANDOFF_DO_NOT_HOOK) {\r
    return EFI_UNSUPPORTED;\r
  }\r
\r
  if (InterruptHandler == NULL && mExternalInterruptHandler[InterruptType] == NULL) {\r
    return EFI_INVALID_PARAMETER;\r
  }\r
\r
  if (InterruptHandler != NULL && mExternalInterruptHandler[InterruptType] != NULL) {\r
    return EFI_ALREADY_STARTED;\r
  }\r
\r
  mExternalInterruptHandler[InterruptType] = InterruptHandler;\r
  return EFI_SUCCESS;\r
}\r
\r
Commit	Line	Data
8f07f895	1	/** @file\r
9b4aa760	2	CPU Exception Library provides PEI/DXE/SMM CPU common exception handler.\r
8f07f895	3	\r
9b4aa760	4	Copyright (c) 2012 - 2016, Intel Corporation. All rights reserved.<BR>\r
8f07f895	5	This program and the accompanying materials are licensed and made available under\r
	6	the terms and conditions of the BSD License that accompanies this distribution.\r
	7	The full text of the license may be found at\r
	8	http://opensource.org/licenses/bsd-license.php.\r
	9	\r
	10	THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
	11	WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
	12	\r
	13	**/\r
	14	\r
8f07f895	15	#include "CpuExceptionCommon.h"\r
e41aad15	16	#include <Library/DebugLib.h>\r
8f07f895	17	\r
	18	//\r
	19	// Spinlock for CPU information display\r
	20	//\r
	21	SPIN_LOCK mDisplayMessageSpinLock;\r
	22	\r
	23	//\r
	24	// Image align size for DXE/SMM\r
	25	//\r
	26	CONST UINTN mImageAlignSize = SIZE_4KB;\r
	27	\r
e41aad15 JF	28	RESERVED_VECTORS_DATA mReservedVectorsData[CPU_EXCEPTION_NUM];\r
	29	EFI_CPU_INTERRUPT_HANDLER mExternalInterruptHandlerTable[CPU_EXCEPTION_NUM];\r
	30	EFI_CPU_INTERRUPT_HANDLER *mExternalInterruptHandler = NULL;\r
	31	UINTN mEnabledInterruptNum = 0;\r
	32	\r
8f07f895	33	/**\r
	34	Common exception handler.\r
	35	\r
	36	@param ExceptionType Exception type.\r
	37	@param SystemContext Pointer to EFI_SYSTEM_CONTEXT.\r
	38	**/\r
	39	VOID\r
	40	EFIAPI\r
	41	CommonExceptionHandler (\r
e41aad15 JF	42	IN EFI_EXCEPTION_TYPE ExceptionType, \r
e41aad15 JF	43	IN EFI_SYSTEM_CONTEXT SystemContext\r
8f07f895	44	)\r
8f07f895	45	{\r
e41aad15 JF	46	EXCEPTION_HANDLER_CONTEXT *ExceptionHandlerContext;\r
	47	\r
	48	ExceptionHandlerContext = (EXCEPTION_HANDLER_CONTEXT *) (UINTN) (SystemContext.SystemContextIa32);\r
	49	\r
	50	switch (mReservedVectors[ExceptionType].Attribute) {\r
	51	case EFI_VECTOR_HANDOFF_HOOK_BEFORE:\r
	52	//\r
	53	// Need to jmp to old IDT handler after this exception handler\r
	54	//\r
	55	ExceptionHandlerContext->ExceptionDataFlag = (mErrorCodeFlag & (1 << ExceptionType)) ? TRUE : FALSE;\r
	56	ExceptionHandlerContext->OldIdtHandler = mReservedVectors[ExceptionType].ExceptonHandler;\r
	57	break;\r
	58	case EFI_VECTOR_HANDOFF_HOOK_AFTER:\r
	59	while (TRUE) {\r
	60	//\r
	61	// If if anyone has gotten SPIN_LOCK for owner running hook after\r
	62	//\r
	63	if (AcquireSpinLockOrFail (&mReservedVectors[ExceptionType].SpinLock)) {\r
	64	//\r
	65	// Need to execute old IDT handler before running this exception handler\r
	66	//\r
	67	mReservedVectors[ExceptionType].ApicId = GetApicId ();\r
	68	ArchSaveExceptionContext (ExceptionType, SystemContext);\r
	69	ExceptionHandlerContext->ExceptionDataFlag = (mErrorCodeFlag & (1 << ExceptionType)) ? TRUE : FALSE;\r
	70	ExceptionHandlerContext->OldIdtHandler = mReservedVectors[ExceptionType].ExceptonHandler;\r
	71	return;\r
	72	}\r
	73	//\r
	74	// If failed to acquire SPIN_LOCK, check if it was locked by processor itself\r
	75	//\r
	76	if (mReservedVectors[ExceptionType].ApicId == GetApicId ()) {\r
	77	//\r
	78	// Old IDT handler has been executed, then retore CPU exception content to\r
	79	// run new exception handler.\r
	80	//\r
	81	ArchRestoreExceptionContext (ExceptionType, SystemContext);\r
	82	//\r
	83	// Rlease spin lock for ApicId\r
	84	//\r
	85	ReleaseSpinLock (&mReservedVectors[ExceptionType].SpinLock);\r
	86	break;\r
	87	}\r
	88	CpuPause ();\r
	89	}\r
	90	break;\r
	91	case 0xffffffff:\r
	92	break;\r
	93	default:\r
	94	//\r
	95	// It should never reach here\r
	96	//\r
	97	CpuDeadLoop ();\r
	98	break;\r
8f07f895	99	}\r
e41aad15 JF	100	\r
	101	if (mExternalInterruptHandler[ExceptionType] != NULL) {\r
	102	(mExternalInterruptHandler[ExceptionType]) (ExceptionType, SystemContext);\r
f3b113bf	103	} else if (ExceptionType < CPU_EXCEPTION_NUM) {\r
e41aad15 JF	104	//\r
	105	// Get Spinlock to display CPU information\r
	106	//\r
	107	while (!AcquireSpinLockOrFail (&mDisplayMessageSpinLock)) {\r
	108	CpuPause ();\r
	109	}\r
	110	//\r
	111	// Display ExceptionType, CPU information and Image information\r
	112	// \r
	113	DumpCpuContent (ExceptionType, SystemContext);\r
	114	//\r
	115	// Release Spinlock of output message\r
	116	//\r
	117	ReleaseSpinLock (&mDisplayMessageSpinLock);\r
	118	//\r
	119	// Enter a dead loop if needn't to execute old IDT handler further\r
	120	//\r
	121	if (mReservedVectors[ExceptionType].Attribute != EFI_VECTOR_HANDOFF_HOOK_BEFORE) {\r
	122	CpuDeadLoop ();\r
	123	}\r
	124	}\r
	125	}\r
8f07f895	126	\r
e41aad15 JF	127	/**\r
	128	Internal worker function to update IDT entries accordling to vector attributes.\r
	129	\r
	130	@param[in] IdtTable Pointer to IDT table.\r
	131	@param[in] TemplateMap Pointer to a buffer where the address map is returned.\r
	132	@param[in] IdtEntryCount IDT entries number to be updated.\r
	133	\r
	134	**/\r
	135	VOID\r
	136	UpdateIdtTable (\r
	137	IN IA32_IDT_GATE_DESCRIPTOR *IdtTable,\r
	138	IN EXCEPTION_HANDLER_TEMPLATE_MAP *TemplateMap,\r
	139	IN UINTN IdtEntryCount\r
	140	)\r
	141	{\r
	142	UINT16 CodeSegment;\r
	143	UINTN Index;\r
	144	UINTN InterruptHandler;\r
8f07f895	145	\r
8f07f895	146	//\r
e41aad15	147	// Use current CS as the segment selector of interrupt gate in IDT\r
8f07f895	148	//\r
e41aad15	149	CodeSegment = AsmReadCs ();\r
8f07f895	150	\r
e41aad15 JF	151	for (Index = 0; Index < IdtEntryCount; Index ++) {\r
	152	IdtTable[Index].Bits.Selector = CodeSegment;\r
	153	//\r
	154	// Check reserved vectors attributes\r
	155	//\r
	156	switch (mReservedVectors[Index].Attribute) {\r
	157	case EFI_VECTOR_HANDOFF_DO_NOT_HOOK:\r
	158	//\r
	159	// Keep original IDT entry\r
	160	//\r
	161	continue;\r
	162	case EFI_VECTOR_HANDOFF_HOOK_AFTER:\r
	163	InitializeSpinLock (&mReservedVectors[Index].SpinLock);\r
	164	CopyMem (\r
	165	(VOID *) mReservedVectors[Index].HookAfterStubHeaderCode,\r
	166	(VOID *) TemplateMap->HookAfterStubHeaderStart,\r
	167	TemplateMap->ExceptionStubHeaderSize\r
	168	);\r
07da1ac8 AF	169	AsmVectorNumFixup (\r
	170	(VOID *) mReservedVectors[Index].HookAfterStubHeaderCode,\r
	171	(UINT8) Index,\r
	172	(VOID *) TemplateMap->HookAfterStubHeaderStart\r
	173	);\r
e41aad15 JF	174	//\r
	175	// Go on the following code\r
	176	//\r
	177	case EFI_VECTOR_HANDOFF_HOOK_BEFORE:\r
	178	//\r
	179	// Save original IDT handler address\r
	180	//\r
	181	mReservedVectors[Index].ExceptonHandler = ArchGetIdtHandler (&IdtTable[Index]);\r
	182	//\r
	183	// Go on the following code\r
	184	//\r
	185	default:\r
	186	//\r
	187	// Update new IDT entry\r
	188	//\r
	189	InterruptHandler = TemplateMap->ExceptionStart + Index * TemplateMap->ExceptionStubHeaderSize;\r
	190	ArchUpdateIdtEntry (&IdtTable[Index], InterruptHandler);\r
	191	break;\r
	192	}\r
	193	}\r
	194	\r
8f07f895	195	//\r
e41aad15	196	// Save Interrupt number to global variable used for RegisterCpuInterruptHandler ()\r
8f07f895	197	//\r
e41aad15	198	mEnabledInterruptNum = IdtEntryCount;\r
8f07f895	199	}\r
	200	\r
	201	/**\r
e41aad15	202	Internal worker function to initialize exception handler.\r
8f07f895	203	\r
ab95e54d JF	204	@param[in] VectorInfo Pointer to reserved vector list.\r
ab95e54d JF	205	@param[in, out] ExceptionHandlerData Pointer to exception handler data.\r
8f07f895	206	\r
e41aad15 JF	207	@retval EFI_SUCCESS CPU Exception Entries have been successfully initialized \r
	208	with default exception handlers.\r
	209	@retval EFI_INVALID_PARAMETER VectorInfo includes the invalid content if VectorInfo is not NULL.\r
	210	@retval EFI_UNSUPPORTED This function is not supported.\r
	211	\r
8f07f895	212	**/\r
e41aad15 JF	213	EFI_STATUS\r
e41aad15 JF	214	InitializeCpuExceptionHandlersWorker (\r
ab95e54d JF	215	IN EFI_VECTOR_HANDOFF_INFO *VectorInfo OPTIONAL,\r
ab95e54d JF	216	IN OUT EXCEPTION_HANDLER_DATA *ExceptionHandlerData\r
8f07f895	217	)\r
8f07f895	218	{\r
e41aad15 JF	219	EFI_STATUS Status;\r
	220	IA32_DESCRIPTOR IdtDescriptor;\r
	221	UINTN IdtEntryCount;\r
	222	EXCEPTION_HANDLER_TEMPLATE_MAP TemplateMap;\r
	223	IA32_IDT_GATE_DESCRIPTOR *IdtTable;\r
ab95e54d	224	RESERVED_VECTORS_DATA *ReservedVectors;\r
e41aad15	225	\r
ab95e54d JF	226	ReservedVectors = ExceptionHandlerData->ReservedVectors;\r
ab95e54d JF	227	SetMem ((VOID ) ReservedVectors, sizeof (RESERVED_VECTORS_DATA) CPU_EXCEPTION_NUM, 0xff);\r
e41aad15	228	if (VectorInfo != NULL) {\r
ab95e54d	229	Status = ReadAndVerifyVectorInfo (VectorInfo, ReservedVectors, CPU_EXCEPTION_NUM);\r
e41aad15 JF	230	if (EFI_ERROR (Status)) {\r
	231	return EFI_INVALID_PARAMETER;\r
	232	}\r
	233	}\r
8f07f895	234	InitializeSpinLock (&mDisplayMessageSpinLock);\r
e41aad15 JF	235	\r
	236	mExternalInterruptHandler = mExternalInterruptHandlerTable;\r
	237	//\r
	238	// Read IDT descriptor and calculate IDT size\r
	239	//\r
	240	AsmReadIdtr (&IdtDescriptor);\r
	241	IdtEntryCount = (IdtDescriptor.Limit + 1) / sizeof (IA32_IDT_GATE_DESCRIPTOR);\r
	242	if (IdtEntryCount > CPU_EXCEPTION_NUM) {\r
	243	//\r
	244	// CPU exeption library only setup CPU_EXCEPTION_NUM exception handler at most\r
	245	//\r
	246	IdtEntryCount = CPU_EXCEPTION_NUM;\r
	247	}\r
	248	\r
	249	IdtTable = (IA32_IDT_GATE_DESCRIPTOR *) IdtDescriptor.Base;\r
	250	AsmGetTemplateAddressMap (&TemplateMap);\r
	251	ASSERT (TemplateMap.ExceptionStubHeaderSize <= HOOKAFTER_STUB_SIZE);\r
	252	UpdateIdtTable (IdtTable, &TemplateMap, IdtEntryCount);\r
	253	mEnabledInterruptNum = IdtEntryCount;\r
	254	return EFI_SUCCESS;\r
	255	}\r
	256	\r
	257	/**\r
	258	Registers a function to be called from the processor interrupt handler.\r
	259	\r
	260	@param[in] InterruptType Defines which interrupt or exception to hook.\r
	261	@param[in] InterruptHandler A pointer to a function of type EFI_CPU_INTERRUPT_HANDLER that is called\r
	262	when a processor interrupt occurs. If this parameter is NULL, then the handler\r
	263	will be uninstalled.\r
	264	\r
	265	@retval EFI_SUCCESS The handler for the processor interrupt was successfully installed or uninstalled.\r
	266	@retval EFI_ALREADY_STARTED InterruptHandler is not NULL, and a handler for InterruptType was\r
	267	previously installed.\r
	268	@retval EFI_INVALID_PARAMETER InterruptHandler is NULL, and a handler for InterruptType was not\r
	269	previously installed.\r
	270	@retval EFI_UNSUPPORTED The interrupt specified by InterruptType is not supported,\r
	271	or this function is not supported.\r
3f25e6ea	272	**/\r
e41aad15 JF	273	EFI_STATUS\r
	274	RegisterCpuInterruptHandlerWorker (\r
	275	IN EFI_EXCEPTION_TYPE InterruptType,\r
	276	IN EFI_CPU_INTERRUPT_HANDLER InterruptHandler\r
	277	)\r
	278	{\r
f3b113bf	279	if (InterruptType < 0 \|\| InterruptType >= (EFI_EXCEPTION_TYPE)mEnabledInterruptNum \|\|\r
e41aad15 JF	280	mReservedVectors[InterruptType].Attribute == EFI_VECTOR_HANDOFF_DO_NOT_HOOK) {\r
	281	return EFI_UNSUPPORTED;\r
	282	}\r
	283	\r
	284	if (InterruptHandler == NULL && mExternalInterruptHandler[InterruptType] == NULL) {\r
	285	return EFI_INVALID_PARAMETER;\r
	286	}\r
	287	\r
	288	if (InterruptHandler != NULL && mExternalInterruptHandler[InterruptType] != NULL) {\r
	289	return EFI_ALREADY_STARTED;\r
	290	}\r
	291	\r
	292	mExternalInterruptHandler[InterruptType] = InterruptHandler;\r
	293	return EFI_SUCCESS;\r
8f07f895	294	}\r
8f07f895	295	\r