[mirror_edk2.git] / SourceLevelDebugPkg / Library / DebugAgent / SmmDebugAgent / SmmDebugAgentLib.c

/** @file\r
  Debug Agent library implementition.\r
\r
  Copyright (c) 2010 - 2013, Intel Corporation. All rights reserved.<BR>\r
  This program and the accompanying materials\r
  are licensed and made available under the terms and conditions of the BSD License\r
  which accompanies this distribution.  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 "SmmDebugAgentLib.h"\r
\r
DEBUG_AGENT_MAILBOX         *mMailboxPointer = NULL;\r
DEBUG_AGENT_MAILBOX         mLocalMailbox;\r
UINTN                       mSavedDebugRegisters[6];\r
IA32_IDT_GATE_DESCRIPTOR    mIdtEntryTable[33];\r
BOOLEAN                     mSkipBreakpoint = FALSE;\r
\r
CHAR8 mWarningMsgIgnoreSmmEntryBreak[] = "Ignore smmentrybreak setting for SMI issued during DXE debugging!\r\n";\r
\r
/**\r
  Check if debug agent support multi-processor.\r
\r
  @retval TRUE    Multi-processor is supported.\r
  @retval FALSE   Multi-processor is not supported.\r
\r
**/\r
BOOLEAN\r
MultiProcessorDebugSupport (\r
  VOID\r
  )\r
{\r
  return FALSE;\r
}\r
\r
/**\r
  Read the Attach/Break-in symbols from the debug port.\r
\r
  @param[in]  Handle         Pointer to Debug Port handle.\r
  @param[out] BreakSymbol    Returned break symbol.\r
\r
  @retval EFI_SUCCESS        Read the symbol in BreakSymbol.\r
  @retval EFI_NOT_FOUND      No read the break symbol.\r
\r
**/\r
EFI_STATUS\r
DebugReadBreakSymbol (\r
  IN  DEBUG_PORT_HANDLE      Handle,\r
  OUT UINT8                  *BreakSymbol\r
  )\r
{\r
  //\r
  // Smm instance has no debug timer to poll break symbol.\r
  //\r
  return EFI_NOT_FOUND;\r
}\r
\r
/**\r
  Get the pointer to Mailbox from the GUIDed HOB.\r
\r
  @return Pointer to Mailbox.\r
\r
**/\r
DEBUG_AGENT_MAILBOX *\r
GetMailboxFromHob (\r
  VOID\r
  )\r
{\r
  EFI_HOB_GUID_TYPE        *GuidHob;\r
  UINT64                   *MailboxLocation;  \r
  DEBUG_AGENT_MAILBOX      *Mailbox;\r
\r
  GuidHob = GetFirstGuidHob (&gEfiDebugAgentGuid);\r
  if (GuidHob == NULL) {\r
    return NULL;\r
  }\r
  MailboxLocation = (UINT64 *) (GET_GUID_HOB_DATA(GuidHob));\r
  Mailbox = (DEBUG_AGENT_MAILBOX *)(UINTN)(*MailboxLocation);\r
  VerifyMailboxChecksum (Mailbox);\r
  \r
  return Mailbox;\r
}\r
\r
/**\r
  Get Debug Agent Mailbox pointer.\r
\r
  @return Mailbox pointer.\r
\r
**/\r
DEBUG_AGENT_MAILBOX *\r
GetMailboxPointer (\r
  VOID\r
  )\r
{\r
  VerifyMailboxChecksum (mMailboxPointer);\r
  return mMailboxPointer;\r
}\r
\r
/**\r
  Get debug port handle.\r
\r
  @return Debug port handle.\r
\r
**/\r
DEBUG_PORT_HANDLE\r
GetDebugPortHandle (\r
  VOID\r
  )\r
{\r
  return (DEBUG_PORT_HANDLE) (UINTN)(GetMailboxPointer()->DebugPortHandle);\r
}\r
\r
/**\r
  Store debug register when SMI exit.\r
\r
**/\r
VOID\r
SaveDebugRegister (\r
  VOID\r
  )\r
{\r
  mSavedDebugRegisters[0] = AsmReadDr0 ();\r
  mSavedDebugRegisters[1] = AsmReadDr1 ();\r
  mSavedDebugRegisters[2] = AsmReadDr2 ();\r
  mSavedDebugRegisters[3] = AsmReadDr3 ();\r
  mSavedDebugRegisters[4] = AsmReadDr6 ();\r
  mSavedDebugRegisters[5] = AsmReadDr7 ();\r
}\r
\r
/**\r
  Restore debug register when SMI exit.\r
\r
**/\r
VOID\r
RestoreDebugRegister (\r
  VOID\r
  )\r
{\r
  AsmWriteDr7 (0);\r
  AsmWriteDr0 (mSavedDebugRegisters[0]);\r
  AsmWriteDr1 (mSavedDebugRegisters[1]);\r
  AsmWriteDr2 (mSavedDebugRegisters[2]);\r
  AsmWriteDr3 (mSavedDebugRegisters[3]);\r
  AsmWriteDr6 (mSavedDebugRegisters[4]);\r
  AsmWriteDr7 (mSavedDebugRegisters[5]);\r
}\r
\r
/**\r
  Initialize debug agent.\r
\r
  This function is used to set up debug enviroment for source level debug\r
  in SMM code.\r
\r
  If InitFlag is DEBUG_AGENT_INIT_SMM, it will overirde IDT table entries\r
  and initialize debug port. It will get debug agent Mailbox from GUIDed HOB,\r
  it it exists, debug agent wiil copied it into the local Mailbox in SMM space.\r
  it will overirde IDT table entries and initialize debug port. Context will be\r
  NULL.\r
  If InitFlag is DEBUG_AGENT_INIT_ENTER_SMI, debug agent will save Debug\r
  Registers and get local Mailbox in SMM space. Context will be NULL.\r
  If InitFlag is DEBUG_AGENT_INIT_EXIT_SMI, debug agent will restore Debug\r
  Registers. Context will be NULL.\r
\r
  @param[in] InitFlag     Init flag is used to decide initialize process.\r
  @param[in] Context      Context needed according to InitFlag.\r
  @param[in] Function     Continue function called by debug agent library; it was\r
                          optional.\r
\r
**/\r
VOID\r
EFIAPI\r
InitializeDebugAgent (\r
  IN UINT32                InitFlag,\r
  IN VOID                  *Context, OPTIONAL\r
  IN DEBUG_AGENT_CONTINUE  Function  OPTIONAL\r
  )\r
{\r
  EFI_STATUS                    Status;\r
  UINT64                        DebugPortHandle;\r
  IA32_IDT_GATE_DESCRIPTOR      IdtEntry[33];\r
  IA32_DESCRIPTOR               IdtDescriptor;\r
  IA32_DESCRIPTOR               *Ia32Idtr;\r
  IA32_IDT_ENTRY                *Ia32IdtEntry;\r
  IA32_DESCRIPTOR               Idtr;\r
  UINT16                        IdtEntryCount;\r
  DEBUG_AGENT_MAILBOX           *Mailbox;\r
  UINT64                        *MailboxLocation;\r
\r
  switch (InitFlag) {\r
  case DEBUG_AGENT_INIT_SMM:\r
    //\r
    // Check if Debug Agent initialized in DXE phase\r
    //\r
    Status = EfiGetSystemConfigurationTable (&gEfiDebugAgentGuid, (VOID **) &Mailbox);\r
    if (Status == EFI_SUCCESS && Mailbox != NULL) {\r
      VerifyMailboxChecksum (Mailbox);\r
      mMailboxPointer = Mailbox;\r
      break;\r
    }\r
    //\r
    // Check if Debug Agent initialized in SEC/PEI phase\r
    //\r
    Mailbox = GetMailboxFromHob (); \r
    if (Mailbox != NULL) {\r
      mMailboxPointer = Mailbox;\r
      break;\r
    }\r
    //\r
    // Debug Agent was not initialized before, uset the local mailbox.\r
    //\r
    ZeroMem (&mLocalMailbox, sizeof (DEBUG_AGENT_MAILBOX));\r
    Mailbox = &mLocalMailbox;\r
    //\r
    // Save original IDT entries\r
    //\r
    AsmReadIdtr (&IdtDescriptor);      \r
    CopyMem (&IdtEntry, (VOID *)IdtDescriptor.Base, 33 * sizeof(IA32_IDT_GATE_DESCRIPTOR));\r
    //\r
    // Initialized Debug Agent\r
    //\r
    InitializeDebugIdt ();\r
    DebugPortHandle = (UINT64) (UINTN)DebugPortInitialize ((DEBUG_PORT_HANDLE) (UINTN)Mailbox->DebugPortHandle, NULL);\r
    UpdateMailboxContent (Mailbox, DEBUG_MAILBOX_DEBUG_PORT_HANDLE_INDEX, DebugPortHandle);\r
    mMailboxPointer = Mailbox;\r
    //\r
    // Trigger one software interrupt to inform HOST\r
    //\r
    TriggerSoftInterrupt (SYSTEM_RESET_SIGNATURE);\r
\r
    SetDebugFlag (DEBUG_AGENT_FLAG_MEMORY_READY, 1);\r
    //\r
    // Memory has been ready\r
    //\r
    if (IsHostAttached ()) {\r
      //\r
      // Trigger one software interrupt to inform HOST\r
      //\r
      TriggerSoftInterrupt (MEMORY_READY_SIGNATURE);\r
    }\r
    //\r
    // Find and report PE/COFF image info to HOST\r
    //  \r
    FindAndReportModuleImageInfo (SIZE_4KB);\r
    //\r
    // Restore saved IDT entries\r
    //     \r
    CopyMem ((VOID *)IdtDescriptor.Base, &IdtEntry, 33 * sizeof(IA32_IDT_GATE_DESCRIPTOR));\r
\r
    break;\r
\r
  case DEBUG_AGENT_INIT_ENTER_SMI:\r
    SaveDebugRegister ();\r
    InitializeDebugIdt ();\r
\r
    Mailbox = GetMailboxPointer ();\r
    if (GetDebugFlag (DEBUG_AGENT_FLAG_AGENT_IN_PROGRESS) == 1) {\r
      //\r
      // If Debug Agent has been communicaton state with HOST, we need skip\r
      // any break points set in SMM, set Skip Breakpoint flag\r
      //\r
      mSkipBreakpoint = TRUE;\r
    }\r
    if (GetDebugFlag (DEBUG_AGENT_FLAG_BREAK_ON_NEXT_SMI) == 1) {\r
      if (mSkipBreakpoint) {\r
        //\r
        // Print warning message if ignore smm entry break\r
        //\r
        DebugPortWriteBuffer ((DEBUG_PORT_HANDLE) (UINTN)Mailbox->DebugPortHandle,\r
                               (UINT8 *)mWarningMsgIgnoreSmmEntryBreak,\r
                               AsciiStrLen (mWarningMsgIgnoreSmmEntryBreak)\r
                               );\r
      } else {\r
        //\r
        // If SMM entry break is set, SMM code will be break at here.\r
        //\r
        CpuBreakpoint ();\r
      }\r
    }\r
    break;\r
\r
  case DEBUG_AGENT_INIT_EXIT_SMI:\r
    Mailbox = GetMailboxPointer ();\r
    //\r
    // Clear Skip Breakpoint flag\r
    //\r
    mSkipBreakpoint = FALSE;\r
    RestoreDebugRegister ();\r
    break;\r
\r
  case DEBUG_AGENT_INIT_THUNK_PEI_IA32TOX64:\r
    if (Context == NULL) {\r
      DEBUG ((EFI_D_ERROR, "DebugAgent: Input parameter Context cannot be NULL!\n"));\r
      CpuDeadLoop ();\r
    } else {\r
      Ia32Idtr =  (IA32_DESCRIPTOR *) Context;\r
      Ia32IdtEntry = (IA32_IDT_ENTRY *)(Ia32Idtr->Base);\r
      MailboxLocation = (UINT64 *) (UINTN) (Ia32IdtEntry[DEBUG_MAILBOX_VECTOR].Bits.OffsetLow + \r
                                           (Ia32IdtEntry[DEBUG_MAILBOX_VECTOR].Bits.OffsetHigh << 16));\r
      mMailboxPointer = (DEBUG_AGENT_MAILBOX *)(UINTN)(*MailboxLocation);\r
      VerifyMailboxChecksum (mMailboxPointer);\r
      //\r
      // Get original IDT address and size.\r
      //\r
      AsmReadIdtr ((IA32_DESCRIPTOR *) &Idtr);\r
      IdtEntryCount = (UINT16) ((Idtr.Limit + 1) / sizeof (IA32_IDT_GATE_DESCRIPTOR));\r
      if (IdtEntryCount < 33) {\r
        Idtr.Limit = (UINT16) (sizeof (IA32_IDT_GATE_DESCRIPTOR) * 33 - 1);\r
        Idtr.Base  = (UINTN) &mIdtEntryTable;\r
        ZeroMem (&mIdtEntryTable, Idtr.Limit + 1);\r
        AsmWriteIdtr ((IA32_DESCRIPTOR *) &Idtr);\r
      }\r
\r
      InitializeDebugIdt ();\r
      //\r
      // Initialize Debug Timer hardware and enable interrupt.\r
      //\r
      InitializeDebugTimer ();\r
      EnableInterrupts ();\r
\r
      FindAndReportModuleImageInfo (SIZE_4KB);\r
    }\r
    break;\r
\r
  default:\r
    //\r
    // Only DEBUG_AGENT_INIT_PREMEM_SEC and DEBUG_AGENT_INIT_POSTMEM_SEC are allowed for this \r
    // Debug Agent library instance.\r
    //\r
    DEBUG ((EFI_D_ERROR, "Debug Agent: The InitFlag value is not allowed!\n"));\r
    CpuDeadLoop ();\r
    break;    \r
  }\r
}\r
\r
Commit	Line	Data
18b144ea	1	/** @file\r
	2	Debug Agent library implementition.\r
	3	\r
b422b62c	4	Copyright (c) 2010 - 2013, Intel Corporation. All rights reserved.<BR>\r
18b144ea	5	This program and the accompanying materials\r
	6	are licensed and made available under the terms and conditions of the BSD License\r
	7	which accompanies this distribution. 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
	15	#include "SmmDebugAgentLib.h"\r
	16	\r
	17	DEBUG_AGENT_MAILBOX *mMailboxPointer = NULL;\r
b6ee5898	18	DEBUG_AGENT_MAILBOX mLocalMailbox;\r
b6ee5898	19	UINTN mSavedDebugRegisters[6];\r
b422b62c	20	IA32_IDT_GATE_DESCRIPTOR mIdtEntryTable[33];\r
	21	BOOLEAN mSkipBreakpoint = FALSE;\r
	22	\r
	23	CHAR8 mWarningMsgIgnoreSmmEntryBreak[] = "Ignore smmentrybreak setting for SMI issued during DXE debugging!\r\n";\r
	24	\r
	25	/**\r
	26	Check if debug agent support multi-processor.\r
	27	\r
	28	@retval TRUE Multi-processor is supported.\r
	29	@retval FALSE Multi-processor is not supported.\r
	30	\r
	31	**/\r
	32	BOOLEAN\r
	33	MultiProcessorDebugSupport (\r
	34	VOID\r
	35	)\r
	36	{\r
	37	return FALSE;\r
	38	}\r
18b144ea	39	\r
93c0bdec	40	/**\r
	41	Read the Attach/Break-in symbols from the debug port.\r
	42	\r
	43	@param[in] Handle Pointer to Debug Port handle.\r
	44	@param[out] BreakSymbol Returned break symbol.\r
	45	\r
	46	@retval EFI_SUCCESS Read the symbol in BreakSymbol.\r
	47	@retval EFI_NOT_FOUND No read the break symbol.\r
	48	\r
	49	**/\r
	50	EFI_STATUS\r
	51	DebugReadBreakSymbol (\r
	52	IN DEBUG_PORT_HANDLE Handle,\r
	53	OUT UINT8 *BreakSymbol\r
	54	)\r
	55	{\r
	56	//\r
	57	// Smm instance has no debug timer to poll break symbol.\r
	58	//\r
	59	return EFI_NOT_FOUND;\r
	60	}\r
18b144ea	61	\r
b422b62c	62	/**\r
	63	Get the pointer to Mailbox from the GUIDed HOB.\r
	64	\r
	65	@return Pointer to Mailbox.\r
	66	\r
	67	**/\r
	68	DEBUG_AGENT_MAILBOX *\r
	69	GetMailboxFromHob (\r
	70	VOID\r
	71	)\r
	72	{\r
	73	EFI_HOB_GUID_TYPE *GuidHob;\r
	74	UINT64 *MailboxLocation; \r
	75	DEBUG_AGENT_MAILBOX *Mailbox;\r
	76	\r
	77	GuidHob = GetFirstGuidHob (&gEfiDebugAgentGuid);\r
	78	if (GuidHob == NULL) {\r
	79	return NULL;\r
	80	}\r
	81	MailboxLocation = (UINT64 *) (GET_GUID_HOB_DATA(GuidHob));\r
	82	Mailbox = (DEBUG_AGENT_MAILBOX )(UINTN)(MailboxLocation);\r
	83	VerifyMailboxChecksum (Mailbox);\r
	84	\r
	85	return Mailbox;\r
	86	}\r
	87	\r
18b144ea	88	/**\r
	89	Get Debug Agent Mailbox pointer.\r
	90	\r
	91	@return Mailbox pointer.\r
	92	\r
	93	**/\r
	94	DEBUG_AGENT_MAILBOX *\r
	95	GetMailboxPointer (\r
	96	VOID\r
	97	)\r
	98	{\r
b422b62c	99	VerifyMailboxChecksum (mMailboxPointer);\r
18b144ea	100	return mMailboxPointer;\r
	101	}\r
	102	\r
	103	/**\r
	104	Get debug port handle.\r
	105	\r
	106	@return Debug port handle.\r
	107	\r
	108	**/\r
	109	DEBUG_PORT_HANDLE\r
	110	GetDebugPortHandle (\r
	111	VOID\r
	112	)\r
	113	{\r
b422b62c	114	return (DEBUG_PORT_HANDLE) (UINTN)(GetMailboxPointer()->DebugPortHandle);\r
18b144ea	115	}\r
	116	\r
	117	/**\r
	118	Store debug register when SMI exit.\r
	119	\r
	120	**/\r
	121	VOID\r
	122	SaveDebugRegister (\r
	123	VOID\r
	124	)\r
	125	{\r
	126	mSavedDebugRegisters[0] = AsmReadDr0 ();\r
	127	mSavedDebugRegisters[1] = AsmReadDr1 ();\r
	128	mSavedDebugRegisters[2] = AsmReadDr2 ();\r
	129	mSavedDebugRegisters[3] = AsmReadDr3 ();\r
	130	mSavedDebugRegisters[4] = AsmReadDr6 ();\r
	131	mSavedDebugRegisters[5] = AsmReadDr7 ();\r
	132	}\r
	133	\r
	134	/**\r
	135	Restore debug register when SMI exit.\r
	136	\r
	137	**/\r
	138	VOID\r
	139	RestoreDebugRegister (\r
	140	VOID\r
	141	)\r
	142	{\r
	143	AsmWriteDr7 (0);\r
	144	AsmWriteDr0 (mSavedDebugRegisters[0]);\r
	145	AsmWriteDr1 (mSavedDebugRegisters[1]);\r
	146	AsmWriteDr2 (mSavedDebugRegisters[2]);\r
	147	AsmWriteDr3 (mSavedDebugRegisters[3]);\r
	148	AsmWriteDr6 (mSavedDebugRegisters[4]);\r
	149	AsmWriteDr7 (mSavedDebugRegisters[5]);\r
	150	}\r
	151	\r
	152	/**\r
	153	Initialize debug agent.\r
	154	\r
	155	This function is used to set up debug enviroment for source level debug\r
	156	in SMM code.\r
	157	\r
	158	If InitFlag is DEBUG_AGENT_INIT_SMM, it will overirde IDT table entries\r
	159	and initialize debug port. It will get debug agent Mailbox from GUIDed HOB,\r
	160	it it exists, debug agent wiil copied it into the local Mailbox in SMM space.\r
	161	it will overirde IDT table entries and initialize debug port. Context will be\r
	162	NULL.\r
	163	If InitFlag is DEBUG_AGENT_INIT_ENTER_SMI, debug agent will save Debug\r
	164	Registers and get local Mailbox in SMM space. Context will be NULL.\r
	165	If InitFlag is DEBUG_AGENT_INIT_EXIT_SMI, debug agent will restore Debug\r
	166	Registers. Context will be NULL.\r
	167	\r
	168	@param[in] InitFlag Init flag is used to decide initialize process.\r
	169	@param[in] Context Context needed according to InitFlag.\r
	170	@param[in] Function Continue function called by debug agent library; it was\r
	171	optional.\r
	172	\r
	173	**/\r
	174	VOID\r
	175	EFIAPI\r
	176	InitializeDebugAgent (\r
	177	IN UINT32 InitFlag,\r
	178	IN VOID *Context, OPTIONAL\r
179	IN DEBUG_AGENT_CONTINUE Function OPTIONAL\r
180	)\r
181	{\r
b422b62c	182	EFI_STATUS Status;\r
	183	UINT64 DebugPortHandle;\r
	184	IA32_IDT_GATE_DESCRIPTOR IdtEntry[33];\r
	185	IA32_DESCRIPTOR IdtDescriptor;\r
	186	IA32_DESCRIPTOR *Ia32Idtr;\r
	187	IA32_IDT_ENTRY *Ia32IdtEntry;\r
	188	IA32_DESCRIPTOR Idtr;\r
	189	UINT16 IdtEntryCount;\r
	190	DEBUG_AGENT_MAILBOX *Mailbox;\r
	191	UINT64 *MailboxLocation;\r
18b144ea	192	\r
	193	switch (InitFlag) {\r
	194	case DEBUG_AGENT_INIT_SMM:\r
b422b62c	195	//\r
	196	// Check if Debug Agent initialized in DXE phase\r
	197	//\r
	198	Status = EfiGetSystemConfigurationTable (&gEfiDebugAgentGuid, (VOID **) &Mailbox);\r
	199	if (Status == EFI_SUCCESS && Mailbox != NULL) {\r
	200	VerifyMailboxChecksum (Mailbox);\r
	201	mMailboxPointer = Mailbox;\r
	202	break;\r
18b144ea	203	}\r
b422b62c	204	//\r
	205	// Check if Debug Agent initialized in SEC/PEI phase\r
	206	//\r
	207	Mailbox = GetMailboxFromHob (); \r
	208	if (Mailbox != NULL) {\r
	209	mMailboxPointer = Mailbox;\r
	210	break;\r
	211	}\r
	212	//\r
	213	// Debug Agent was not initialized before, uset the local mailbox.\r
	214	//\r
	215	ZeroMem (&mLocalMailbox, sizeof (DEBUG_AGENT_MAILBOX));\r
	216	Mailbox = &mLocalMailbox;\r
	217	//\r
	218	// Save original IDT entries\r
	219	//\r
	220	AsmReadIdtr (&IdtDescriptor); \r
	221	CopyMem (&IdtEntry, (VOID )IdtDescriptor.Base, 33 sizeof(IA32_IDT_GATE_DESCRIPTOR));\r
	222	//\r
	223	// Initialized Debug Agent\r
	224	//\r
	225	InitializeDebugIdt ();\r
	226	DebugPortHandle = (UINT64) (UINTN)DebugPortInitialize ((DEBUG_PORT_HANDLE) (UINTN)Mailbox->DebugPortHandle, NULL);\r
	227	UpdateMailboxContent (Mailbox, DEBUG_MAILBOX_DEBUG_PORT_HANDLE_INDEX, DebugPortHandle);\r
	228	mMailboxPointer = Mailbox;\r
	229	//\r
	230	// Trigger one software interrupt to inform HOST\r
	231	//\r
	232	TriggerSoftInterrupt (SYSTEM_RESET_SIGNATURE);\r
	233	\r
	234	SetDebugFlag (DEBUG_AGENT_FLAG_MEMORY_READY, 1);\r
	235	//\r
	236	// Memory has been ready\r
	237	//\r
	238	if (IsHostAttached ()) {\r
	239	//\r
	240	// Trigger one software interrupt to inform HOST\r
	241	//\r
	242	TriggerSoftInterrupt (MEMORY_READY_SIGNATURE);\r
	243	}\r
	244	//\r
	245	// Find and report PE/COFF image info to HOST\r
	246	// \r
	247	FindAndReportModuleImageInfo (SIZE_4KB);\r
	248	//\r
	249	// Restore saved IDT entries\r
	250	// \r
	251	CopyMem ((VOID )IdtDescriptor.Base, &IdtEntry, 33 sizeof(IA32_IDT_GATE_DESCRIPTOR));\r
18b144ea	252	\r
	253	break;\r
	254	\r
	255	case DEBUG_AGENT_INIT_ENTER_SMI:\r
	256	SaveDebugRegister ();\r
	257	InitializeDebugIdt ();\r
	258	\r
b422b62c	259	Mailbox = GetMailboxPointer ();\r
b422b62c	260	if (GetDebugFlag (DEBUG_AGENT_FLAG_AGENT_IN_PROGRESS) == 1) {\r
18b144ea	261	//\r
b422b62c	262	// If Debug Agent has been communicaton state with HOST, we need skip\r
b422b62c	263	// any break points set in SMM, set Skip Breakpoint flag\r
18b144ea	264	//\r
b422b62c	265	mSkipBreakpoint = TRUE;\r
	266	}\r
	267	if (GetDebugFlag (DEBUG_AGENT_FLAG_BREAK_ON_NEXT_SMI) == 1) {\r
	268	if (mSkipBreakpoint) {\r
	269	//\r
	270	// Print warning message if ignore smm entry break\r
	271	//\r
	272	DebugPortWriteBuffer ((DEBUG_PORT_HANDLE) (UINTN)Mailbox->DebugPortHandle,\r
	273	(UINT8 *)mWarningMsgIgnoreSmmEntryBreak,\r
	274	AsciiStrLen (mWarningMsgIgnoreSmmEntryBreak)\r
	275	);\r
	276	} else {\r
18b144ea	277	//\r
	278	// If SMM entry break is set, SMM code will be break at here.\r
	279	//\r
	280	CpuBreakpoint ();\r
	281	}\r
	282	}\r
	283	break;\r
	284	\r
	285	case DEBUG_AGENT_INIT_EXIT_SMI:\r
b422b62c	286	Mailbox = GetMailboxPointer ();\r
	287	//\r
	288	// Clear Skip Breakpoint flag\r
	289	//\r
	290	mSkipBreakpoint = FALSE;\r
18b144ea	291	RestoreDebugRegister ();\r
18b144ea	292	break;\r
b422b62c	293	\r
	294	case DEBUG_AGENT_INIT_THUNK_PEI_IA32TOX64:\r
	295	if (Context == NULL) {\r
	296	DEBUG ((EFI_D_ERROR, "DebugAgent: Input parameter Context cannot be NULL!\n"));\r
	297	CpuDeadLoop ();\r
	298	} else {\r
	299	Ia32Idtr = (IA32_DESCRIPTOR *) Context;\r
	300	Ia32IdtEntry = (IA32_IDT_ENTRY *)(Ia32Idtr->Base);\r
	301	MailboxLocation = (UINT64 *) (UINTN) (Ia32IdtEntry[DEBUG_MAILBOX_VECTOR].Bits.OffsetLow + \r
	302	(Ia32IdtEntry[DEBUG_MAILBOX_VECTOR].Bits.OffsetHigh << 16));\r
	303	mMailboxPointer = (DEBUG_AGENT_MAILBOX )(UINTN)(MailboxLocation);\r
	304	VerifyMailboxChecksum (mMailboxPointer);\r
	305	//\r
	306	// Get original IDT address and size.\r
	307	//\r
	308	AsmReadIdtr ((IA32_DESCRIPTOR *) &Idtr);\r
	309	IdtEntryCount = (UINT16) ((Idtr.Limit + 1) / sizeof (IA32_IDT_GATE_DESCRIPTOR));\r
	310	if (IdtEntryCount < 33) {\r
	311	Idtr.Limit = (UINT16) (sizeof (IA32_IDT_GATE_DESCRIPTOR) * 33 - 1);\r
	312	Idtr.Base = (UINTN) &mIdtEntryTable;\r
	313	ZeroMem (&mIdtEntryTable, Idtr.Limit + 1);\r
	314	AsmWriteIdtr ((IA32_DESCRIPTOR *) &Idtr);\r
	315	}\r
	316	\r
	317	InitializeDebugIdt ();\r
	318	//\r
	319	// Initialize Debug Timer hardware and enable interrupt.\r
	320	//\r
	321	InitializeDebugTimer ();\r
	322	EnableInterrupts ();\r
	323	\r
	324	FindAndReportModuleImageInfo (SIZE_4KB);\r
	325	}\r
	326	break;\r
	327	\r
	328	default:\r
	329	//\r
	330	// Only DEBUG_AGENT_INIT_PREMEM_SEC and DEBUG_AGENT_INIT_POSTMEM_SEC are allowed for this \r
	331	// Debug Agent library instance.\r
	332	//\r
	333	DEBUG ((EFI_D_ERROR, "Debug Agent: The InitFlag value is not allowed!\n"));\r
	334	CpuDeadLoop ();\r
	335	break; \r
18b144ea	336	}\r
	337	}\r
	338	\r