/** @file\r
SMI management.\r
\r
- Copyright (c) 2009 - 2010, Intel Corporation. All rights reserved.<BR>\r
+ Copyright (c) 2009 - 2018, Intel Corporation. All rights reserved.<BR>\r
This program and the accompanying materials are licensed and made available \r
under the terms and conditions of the BSD License which accompanies this \r
distribution. The full text of the license may be found at \r
\r
#include "PiSmmCore.h"\r
\r
-//\r
-// SMM_HANDLER - used for each SMM handler\r
-//\r
-\r
-#define SMI_ENTRY_SIGNATURE SIGNATURE_32('s','m','i','e')\r
-\r
- typedef struct {\r
- UINTN Signature;\r
- LIST_ENTRY AllEntries; // All entries\r
-\r
- EFI_GUID HandlerType; // Type of interrupt\r
- LIST_ENTRY SmiHandlers; // All handlers\r
-} SMI_ENTRY;\r
-\r
-#define SMI_HANDLER_SIGNATURE SIGNATURE_32('s','m','i','h')\r
-\r
- typedef struct {\r
- UINTN Signature;\r
- LIST_ENTRY Link; // Link on SMI_ENTRY.SmiHandlers\r
- EFI_SMM_HANDLER_ENTRY_POINT2 Handler; // The smm handler's entry point\r
- SMI_ENTRY *SmiEntry;\r
-} SMI_HANDLER;\r
-\r
-LIST_ENTRY mRootSmiHandlerList = INITIALIZE_LIST_HEAD_VARIABLE (mRootSmiHandlerList);\r
LIST_ENTRY mSmiEntryList = INITIALIZE_LIST_HEAD_VARIABLE (mSmiEntryList);\r
\r
+SMI_ENTRY mRootSmiEntry = {\r
+ SMI_ENTRY_SIGNATURE,\r
+ INITIALIZE_LIST_HEAD_VARIABLE (mRootSmiEntry.AllEntries),\r
+ {0},\r
+ INITIALIZE_LIST_HEAD_VARIABLE (mRootSmiEntry.SmiHandlers),\r
+};\r
+\r
/**\r
Finds the SMI entry for the requested handler type.\r
\r
@param CommBuffer Points to the optional communication buffer.\r
@param CommBufferSize Points to the size of the optional communication buffer.\r
\r
- @retval EFI_SUCCESS Interrupt source was processed successfully but not quiesced.\r
+ @retval EFI_WARN_INTERRUPT_SOURCE_PENDING Interrupt source was processed successfully but not quiesced.\r
@retval EFI_INTERRUPT_PENDING One or more SMI sources could not be quiesced.\r
- @retval EFI_WARN_INTERRUPT_SOURCE_PENDING Interrupt source was not handled or quiesced.\r
- @retval EFI_WARN_INTERRUPT_SOURCE_QUIESCED Interrupt source was handled and quiesced.\r
+ @retval EFI_NOT_FOUND Interrupt source was not handled or quiesced.\r
+ @retval EFI_SUCCESS Interrupt source was handled and quiesced.\r
\r
**/\r
EFI_STATUS\r
LIST_ENTRY *Head;\r
SMI_ENTRY *SmiEntry;\r
SMI_HANDLER *SmiHandler;\r
- BOOLEAN InterruptQuiesced;\r
+ BOOLEAN SuccessReturn;\r
EFI_STATUS Status;\r
\r
+ Status = EFI_NOT_FOUND;\r
+ SuccessReturn = FALSE;\r
if (HandlerType == NULL) {\r
//\r
// Root SMI handler\r
//\r
- Status = EFI_WARN_INTERRUPT_SOURCE_PENDING;\r
-\r
- Head = &mRootSmiHandlerList;\r
- for (Link = Head->ForwardLink; Link != Head; Link = Link->ForwardLink) {\r
- SmiHandler = CR (Link, SMI_HANDLER, Link, SMI_HANDLER_SIGNATURE);\r
-\r
- Status = SmiHandler->Handler (\r
- (EFI_HANDLE) SmiHandler,\r
- Context,\r
- CommBuffer,\r
- CommBufferSize\r
- );\r
- if (Status == EFI_SUCCESS || Status == EFI_INTERRUPT_PENDING) {\r
- return Status;\r
- }\r
- }\r
- return Status;\r
- }\r
-\r
- //\r
- // Non-root SMI handler\r
- //\r
- SmiEntry = SmmCoreFindSmiEntry ((EFI_GUID *) HandlerType, FALSE);\r
- if (SmiEntry == NULL) {\r
+ SmiEntry = &mRootSmiEntry;\r
+ } else {\r
//\r
- // There is no handler registered for this interrupt source\r
+ // Non-root SMI handler\r
//\r
- return EFI_WARN_INTERRUPT_SOURCE_PENDING;\r
+ SmiEntry = SmmCoreFindSmiEntry ((EFI_GUID *) HandlerType, FALSE);\r
+ if (SmiEntry == NULL) {\r
+ //\r
+ // There is no handler registered for this interrupt source\r
+ //\r
+ return Status;\r
+ }\r
}\r
-\r
- InterruptQuiesced = FALSE;\r
Head = &SmiEntry->SmiHandlers;\r
+\r
for (Link = Head->ForwardLink; Link != Head; Link = Link->ForwardLink) {\r
SmiHandler = CR (Link, SMI_HANDLER, Link, SMI_HANDLER_SIGNATURE);\r
\r
switch (Status) {\r
case EFI_INTERRUPT_PENDING:\r
//\r
- // If a handler returns EFI_INTERRUPT_PENDING, the interrupt could not be\r
- // quiesced, then no additional handlers will be processed,\r
- // and EFI_INTERRUPT_PENDING will be returned\r
+ // If a handler returns EFI_INTERRUPT_PENDING and HandlerType is not NULL then\r
+ // no additional handlers will be processed and EFI_INTERRUPT_PENDING will be returned.\r
//\r
- return EFI_INTERRUPT_PENDING;\r
+ if (HandlerType != NULL) {\r
+ return EFI_INTERRUPT_PENDING;\r
+ }\r
+ break;\r
\r
case EFI_SUCCESS:\r
//\r
- // If handler return EFI_SUCCESS, the interrupt was handled and quiesced,\r
- // no other handlers should still be called,\r
- // and EFI_WARN_INTERRUPT_SOURCE_QUIESCED will be returned\r
+ // If at least one of the handlers returns EFI_SUCCESS then the function will return\r
+ // EFI_SUCCESS. If a handler returns EFI_SUCCESS and HandlerType is not NULL then no\r
+ // additional handlers will be processed.\r
//\r
- return EFI_WARN_INTERRUPT_SOURCE_QUIESCED;\r
+ if (HandlerType != NULL) {\r
+ return EFI_SUCCESS;\r
+ }\r
+ SuccessReturn = TRUE;\r
+ break;\r
\r
case EFI_WARN_INTERRUPT_SOURCE_QUIESCED:\r
//\r
- // If at least one of the handlers report EFI_WARN_INTERRUPT_SOURCE_QUIESCED,\r
- // then this function will return EFI_WARN_INTERRUPT_SOURCE_QUIESCED\r
+ // If at least one of the handlers returns EFI_WARN_INTERRUPT_SOURCE_QUIESCED\r
+ // then the function will return EFI_SUCCESS. \r
+ //\r
+ SuccessReturn = TRUE;\r
+ break;\r
+\r
+ case EFI_WARN_INTERRUPT_SOURCE_PENDING:\r
+ //\r
+ // If all the handlers returned EFI_WARN_INTERRUPT_SOURCE_PENDING\r
+ // then EFI_WARN_INTERRUPT_SOURCE_PENDING will be returned.\r
//\r
- InterruptQuiesced = TRUE;\r
break;\r
\r
default:\r
+ //\r
+ // Unexpected status code returned.\r
+ //\r
+ ASSERT (FALSE);\r
break;\r
}\r
}\r
\r
- if (InterruptQuiesced) {\r
- Status = EFI_WARN_INTERRUPT_SOURCE_QUIESCED;\r
- } else {\r
- //\r
- // If no handler report EFI_WARN_INTERRUPT_SOURCE_QUIESCED, then this\r
- // function will return EFI_INTERRUPT_PENDING\r
- //\r
- Status = EFI_INTERRUPT_PENDING;\r
+ if (SuccessReturn) {\r
+ Status = EFI_SUCCESS;\r
}\r
+\r
return Status;\r
}\r
\r
\r
SmiHandler->Signature = SMI_HANDLER_SIGNATURE;\r
SmiHandler->Handler = Handler;\r
+ SmiHandler->CallerAddr = (UINTN)RETURN_ADDRESS (0);\r
\r
if (HandlerType == NULL) {\r
//\r
// This is root SMI handler\r
//\r
- SmiEntry = NULL;\r
- List = &mRootSmiHandlerList;\r
+ SmiEntry = &mRootSmiEntry;\r
} else {\r
//\r
// None root SMI handler\r
if (SmiEntry == NULL) {\r
return EFI_OUT_OF_RESOURCES;\r
}\r
-\r
- List = &SmiEntry->SmiHandlers;\r
}\r
+ List = &SmiEntry->SmiHandlers;\r
\r
SmiHandler->SmiEntry = SmiEntry;\r
InsertTailList (List, &SmiHandler->Link);\r
{\r
SMI_HANDLER *SmiHandler;\r
SMI_ENTRY *SmiEntry;\r
+ LIST_ENTRY *EntryLink;\r
+ LIST_ENTRY *HandlerLink;\r
\r
- SmiHandler = (SMI_HANDLER *) DispatchHandle;\r
-\r
- if (SmiHandler == NULL) {\r
+ if (DispatchHandle == NULL) {\r
return EFI_INVALID_PARAMETER;\r
}\r
\r
- if (SmiHandler->Signature != SMI_HANDLER_SIGNATURE) {\r
+ //\r
+ // Look for it in root SMI handlers\r
+ //\r
+ SmiHandler = NULL;\r
+ for ( HandlerLink = GetFirstNode (&mRootSmiEntry.SmiHandlers)\r
+ ; !IsNull (&mRootSmiEntry.SmiHandlers, HandlerLink) && (SmiHandler != DispatchHandle)\r
+ ; HandlerLink = GetNextNode (&mRootSmiEntry.SmiHandlers, HandlerLink)\r
+ ) {\r
+ SmiHandler = CR (HandlerLink, SMI_HANDLER, Link, SMI_HANDLER_SIGNATURE);\r
+ }\r
+\r
+ //\r
+ // Look for it in non-root SMI handlers\r
+ //\r
+ for ( EntryLink = GetFirstNode (&mSmiEntryList)\r
+ ; !IsNull (&mSmiEntryList, EntryLink) && (SmiHandler != DispatchHandle)\r
+ ; EntryLink = GetNextNode (&mSmiEntryList, EntryLink)\r
+ ) {\r
+ SmiEntry = CR (EntryLink, SMI_ENTRY, AllEntries, SMI_ENTRY_SIGNATURE);\r
+ for ( HandlerLink = GetFirstNode (&SmiEntry->SmiHandlers)\r
+ ; !IsNull (&SmiEntry->SmiHandlers, HandlerLink) && (SmiHandler != DispatchHandle)\r
+ ; HandlerLink = GetNextNode (&SmiEntry->SmiHandlers, HandlerLink)\r
+ ) {\r
+ SmiHandler = CR (HandlerLink, SMI_HANDLER, Link, SMI_HANDLER_SIGNATURE);\r
+ }\r
+ }\r
+\r
+ if (SmiHandler != DispatchHandle) {\r
return EFI_INVALID_PARAMETER;\r
}\r
\r
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