/** @file\r
CPU exception handler library implemenation for DXE modules.\r
\r
- Copyright (c) 2013 - 2016, 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
+ Copyright (c) 2013 - 2022, Intel Corporation. All rights reserved.<BR>\r
+ SPDX-License-Identifier: BSD-2-Clause-Patent\r
\r
**/\r
\r
#include "CpuExceptionCommon.h"\r
#include <Library/DebugLib.h>\r
#include <Library/MemoryAllocationLib.h>\r
+#include <Library/UefiBootServicesTableLib.h>\r
\r
-CONST UINTN mDoFarReturnFlag = 0;\r
+CONST UINTN mDoFarReturnFlag = 0;\r
\r
-extern SPIN_LOCK mDisplayMessageSpinLock;\r
-extern EFI_CPU_INTERRUPT_HANDLER *mExternalInterruptHandler;\r
-extern RESERVED_VECTORS_DATA mReservedVectorsData[CPU_EXCEPTION_NUM];\r
-extern EFI_CPU_INTERRUPT_HANDLER mExternalInterruptHandlerTable[CPU_EXCEPTION_NUM];\r
-EXCEPTION_HANDLER_DATA mExceptionHandlerData;\r
+RESERVED_VECTORS_DATA mReservedVectorsData[CPU_INTERRUPT_NUM];\r
+EFI_CPU_INTERRUPT_HANDLER mExternalInterruptHandlerTable[CPU_INTERRUPT_NUM];\r
+EXCEPTION_HANDLER_DATA mExceptionHandlerData = {\r
+ CPU_INTERRUPT_NUM,\r
+ 0, // To be fixed\r
+ mReservedVectorsData,\r
+ mExternalInterruptHandlerTable\r
+};\r
\r
-/**\r
- Initializes all CPU exceptions entries and provides the default exception handlers.\r
- \r
- Caller should try to get an array of interrupt and/or exception vectors that are in use and need to\r
- persist by EFI_VECTOR_HANDOFF_INFO defined in PI 1.3 specification.\r
- If caller cannot get reserved vector list or it does not exists, set VectorInfo to NULL. \r
- If VectorInfo is not NULL, the exception vectors will be initialized per vector attribute accordingly.\r
+UINT8 mNewStack[CPU_STACK_SWITCH_EXCEPTION_NUMBER *\r
+ CPU_KNOWN_GOOD_STACK_SIZE];\r
+UINT8 mNewGdt[CPU_TSS_GDT_SIZE];\r
\r
- @param[in] VectorInfo Pointer to reserved vector list.\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
+ Common exception handler.\r
\r
+ @param ExceptionType Exception type.\r
+ @param SystemContext Pointer to EFI_SYSTEM_CONTEXT.\r
**/\r
-EFI_STATUS\r
+VOID\r
EFIAPI\r
-InitializeCpuExceptionHandlers (\r
- IN EFI_VECTOR_HANDOFF_INFO *VectorInfo OPTIONAL\r
+CommonExceptionHandler (\r
+ IN EFI_EXCEPTION_TYPE ExceptionType,\r
+ IN EFI_SYSTEM_CONTEXT SystemContext\r
)\r
{\r
- mExceptionHandlerData.ReservedVectors = mReservedVectorsData;\r
- mExceptionHandlerData.ExternalInterruptHandler = mExternalInterruptHandlerTable;\r
- InitializeSpinLock (&mExceptionHandlerData.DisplayMessageSpinLock);\r
- return InitializeCpuExceptionHandlersWorker (VectorInfo, &mExceptionHandlerData);\r
+ CommonExceptionHandlerWorker (ExceptionType, SystemContext, &mExceptionHandlerData);\r
}\r
\r
/**\r
- Initializes all CPU interrupt/exceptions entries and provides the default interrupt/exception handlers.\r
- \r
+ Initializes all CPU exceptions entries and provides the default exception handlers.\r
+\r
Caller should try to get an array of interrupt and/or exception vectors that are in use and need to\r
persist by EFI_VECTOR_HANDOFF_INFO defined in PI 1.3 specification.\r
- If caller cannot get reserved vector list or it does not exists, set VectorInfo to NULL. \r
+ If caller cannot get reserved vector list or it does not exists, set VectorInfo to NULL.\r
If VectorInfo is not NULL, the exception vectors will be initialized per vector attribute accordingly.\r
\r
@param[in] VectorInfo Pointer to reserved vector list.\r
- \r
- @retval EFI_SUCCESS All CPU interrupt/exception entries have been successfully initialized \r
- with default interrupt/exception handlers.\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
EFIAPI\r
-InitializeCpuInterruptHandlers (\r
- IN EFI_VECTOR_HANDOFF_INFO *VectorInfo OPTIONAL\r
+InitializeCpuExceptionHandlers (\r
+ IN EFI_VECTOR_HANDOFF_INFO *VectorInfo OPTIONAL\r
)\r
{\r
- EFI_STATUS Status;\r
- IA32_IDT_GATE_DESCRIPTOR *IdtTable;\r
- IA32_DESCRIPTOR IdtDescriptor;\r
- UINTN IdtEntryCount;\r
- EXCEPTION_HANDLER_TEMPLATE_MAP TemplateMap;\r
- UINTN Index;\r
- UINTN InterruptEntry;\r
- UINT8 *InterruptEntryCode;\r
- RESERVED_VECTORS_DATA *ReservedVectors;\r
- EFI_CPU_INTERRUPT_HANDLER *ExternalInterruptHandler;\r
-\r
- ReservedVectors = AllocatePool (sizeof (RESERVED_VECTORS_DATA) * CPU_INTERRUPT_NUM);\r
- ASSERT (ReservedVectors != NULL);\r
- SetMem ((VOID *) ReservedVectors, sizeof (RESERVED_VECTORS_DATA) * CPU_INTERRUPT_NUM, 0xff);\r
- if (VectorInfo != NULL) {\r
- Status = ReadAndVerifyVectorInfo (VectorInfo, ReservedVectors, CPU_INTERRUPT_NUM);\r
- if (EFI_ERROR (Status)) {\r
- FreePool (ReservedVectors);\r
- return EFI_INVALID_PARAMETER;\r
- }\r
- }\r
- InitializeSpinLock (&mDisplayMessageSpinLock);\r
- ExternalInterruptHandler = AllocateZeroPool (sizeof (EFI_CPU_INTERRUPT_HANDLER) * CPU_INTERRUPT_NUM);\r
- ASSERT (ExternalInterruptHandler != NULL);\r
-\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_INTERRUPT_NUM) {\r
- IdtEntryCount = CPU_INTERRUPT_NUM;\r
- }\r
- //\r
- // Create Interrupt Descriptor Table and Copy the old IDT table in\r
- //\r
- IdtTable = AllocateZeroPool (sizeof (IA32_IDT_GATE_DESCRIPTOR) * CPU_INTERRUPT_NUM);\r
- ASSERT (IdtTable != NULL);\r
- CopyMem (IdtTable, (VOID *)IdtDescriptor.Base, sizeof (IA32_IDT_GATE_DESCRIPTOR) * IdtEntryCount);\r
-\r
- AsmGetTemplateAddressMap (&TemplateMap);\r
- ASSERT (TemplateMap.ExceptionStubHeaderSize <= HOOKAFTER_STUB_SIZE);\r
- InterruptEntryCode = AllocatePool (TemplateMap.ExceptionStubHeaderSize * CPU_INTERRUPT_NUM);\r
- ASSERT (InterruptEntryCode != NULL);\r
- \r
- InterruptEntry = (UINTN) InterruptEntryCode;\r
- for (Index = 0; Index < CPU_INTERRUPT_NUM; Index ++) {\r
- CopyMem (\r
- (VOID *) InterruptEntry,\r
- (VOID *) TemplateMap.ExceptionStart,\r
- TemplateMap.ExceptionStubHeaderSize\r
- );\r
- AsmVectorNumFixup ((VOID *) InterruptEntry, (UINT8) Index, (VOID *) TemplateMap.ExceptionStart);\r
- InterruptEntry += TemplateMap.ExceptionStubHeaderSize;\r
- }\r
-\r
- TemplateMap.ExceptionStart = (UINTN) InterruptEntryCode;\r
- mExceptionHandlerData.IdtEntryCount = CPU_INTERRUPT_NUM;\r
- mExceptionHandlerData.ReservedVectors = ReservedVectors;\r
- mExceptionHandlerData.ExternalInterruptHandler = ExternalInterruptHandler;\r
InitializeSpinLock (&mExceptionHandlerData.DisplayMessageSpinLock);\r
-\r
- UpdateIdtTable (IdtTable, &TemplateMap, &mExceptionHandlerData);\r
-\r
- //\r
- // Load Interrupt Descriptor Table\r
- //\r
- IdtDescriptor.Base = (UINTN) IdtTable;\r
- IdtDescriptor.Limit = (UINT16) (sizeof (IA32_IDT_GATE_DESCRIPTOR) * CPU_INTERRUPT_NUM - 1);\r
- AsmWriteIdtr ((IA32_DESCRIPTOR *) &IdtDescriptor);\r
-\r
- return EFI_SUCCESS;\r
+ return InitializeCpuExceptionHandlersWorker (VectorInfo, &mExceptionHandlerData);\r
}\r
\r
/**\r
Registers a function to be called from the processor interrupt handler.\r
\r
- This function registers and enables the handler specified by InterruptHandler for a processor \r
- interrupt or exception type specified by InterruptType. If InterruptHandler is NULL, then the \r
- handler for the processor interrupt or exception type specified by InterruptType is uninstalled. \r
+ This function registers and enables the handler specified by InterruptHandler for a processor\r
+ interrupt or exception type specified by InterruptType. If InterruptHandler is NULL, then the\r
+ handler for the processor interrupt or exception type specified by InterruptType is uninstalled.\r
The installed handler is called once for each processor interrupt or exception.\r
- NOTE: This function should be invoked after InitializeCpuExceptionHandlers() or\r
- InitializeCpuInterruptHandlers() invoked, otherwise EFI_UNSUPPORTED returned.\r
+ NOTE: This function should be invoked after InitializeCpuExceptionHandlers() is invoked,\r
+ otherwise EFI_UNSUPPORTED returned.\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
EFI_STATUS\r
EFIAPI\r
RegisterCpuInterruptHandler (\r
- IN EFI_EXCEPTION_TYPE InterruptType,\r
- IN EFI_CPU_INTERRUPT_HANDLER InterruptHandler\r
+ IN EFI_EXCEPTION_TYPE InterruptType,\r
+ IN EFI_CPU_INTERRUPT_HANDLER InterruptHandler\r
)\r
{\r
return RegisterCpuInterruptHandlerWorker (InterruptType, InterruptHandler, &mExceptionHandlerData);\r
}\r
+\r
+/**\r
+ Setup separate stacks for certain exception handlers.\r
+\r
+ InitData is optional and processor arch dependent.\r
+\r
+ @param[in] InitData Pointer to data optional for information about how\r
+ to assign stacks for certain exception handlers.\r
+\r
+ @retval EFI_SUCCESS The stacks are assigned successfully.\r
+ @retval EFI_UNSUPPORTED This function is not supported.\r
+\r
+**/\r
+EFI_STATUS\r
+EFIAPI\r
+InitializeSeparateExceptionStacks (\r
+ IN CPU_EXCEPTION_INIT_DATA *InitData OPTIONAL\r
+ )\r
+{\r
+ CPU_EXCEPTION_INIT_DATA EssData;\r
+ IA32_DESCRIPTOR Idtr;\r
+ IA32_DESCRIPTOR Gdtr;\r
+\r
+ if (InitData == NULL) {\r
+ SetMem (mNewGdt, sizeof (mNewGdt), 0);\r
+\r
+ AsmReadIdtr (&Idtr);\r
+ AsmReadGdtr (&Gdtr);\r
+\r
+ EssData.X64.Revision = CPU_EXCEPTION_INIT_DATA_REV;\r
+ EssData.X64.KnownGoodStackTop = (UINTN)mNewStack + sizeof (mNewStack);\r
+ EssData.X64.KnownGoodStackSize = CPU_KNOWN_GOOD_STACK_SIZE;\r
+ EssData.X64.StackSwitchExceptions = CPU_STACK_SWITCH_EXCEPTION_LIST;\r
+ EssData.X64.StackSwitchExceptionNumber = CPU_STACK_SWITCH_EXCEPTION_NUMBER;\r
+ EssData.X64.IdtTable = (VOID *)Idtr.Base;\r
+ EssData.X64.IdtTableSize = Idtr.Limit + 1;\r
+ EssData.X64.GdtTable = mNewGdt;\r
+ EssData.X64.GdtTableSize = sizeof (mNewGdt);\r
+ EssData.X64.ExceptionTssDesc = mNewGdt + Gdtr.Limit + 1;\r
+ EssData.X64.ExceptionTssDescSize = CPU_TSS_DESC_SIZE;\r
+ EssData.X64.ExceptionTss = mNewGdt + Gdtr.Limit + 1 + CPU_TSS_DESC_SIZE;\r
+ EssData.X64.ExceptionTssSize = CPU_TSS_SIZE;\r
+\r
+ InitData = &EssData;\r
+ }\r
+\r
+ return ArchSetupExceptionStack (InitData);\r
+}\r
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