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/** @file
CPU exception handler library implementation for PEIM module.
Copyright (c) 2016, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials are licensed and made available under
the terms and conditions of the BSD License that accompanies this distribution.
The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php.
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
#include <PiPei.h>
#include "CpuExceptionCommon.h"
#include <Library/DebugLib.h>
#include <Library/HobLib.h>
#include <Library/MemoryAllocationLib.h>
//
// Image Alignment size for PEI phase
//
CONST UINTN mImageAlignSize = 4;
CONST UINTN mDoFarReturnFlag = 0;
EFI_GUID mCpuExceptrionHandlerLibHobGuid = CPU_EXCEPTION_HANDLER_LIB_HOB_GUID;
/**
Get exception handler data pointer from GUIDed HOb.
@return pointer to exception handler data.
**/
EXCEPTION_HANDLER_DATA *
GetExceptionHandlerData (
VOID
)
{
EFI_HOB_GUID_TYPE *GuidHob;
VOID *DataInHob;
EXCEPTION_HANDLER_DATA *ExceptionHandlerData;
ExceptionHandlerData = NULL;
GuidHob = GetFirstGuidHob (&mCpuExceptrionHandlerLibHobGuid);
if (GuidHob != NULL) {
DataInHob = GET_GUID_HOB_DATA (GuidHob);
ExceptionHandlerData = (EXCEPTION_HANDLER_DATA *)(*(UINTN *)DataInHob);
}
ASSERT (ExceptionHandlerData != NULL);
return ExceptionHandlerData;
}
/**
Common exception handler.
@param ExceptionType Exception type.
@param SystemContext Pointer to EFI_SYSTEM_CONTEXT.
**/
VOID
EFIAPI
CommonExceptionHandler (
IN EFI_EXCEPTION_TYPE ExceptionType,
IN EFI_SYSTEM_CONTEXT SystemContext
)
{
EXCEPTION_HANDLER_DATA *ExceptionHandlerData;
ExceptionHandlerData = GetExceptionHandlerData ();
CommonExceptionHandlerWorker (ExceptionType, SystemContext, ExceptionHandlerData);
}
/**
Initializes all CPU exceptions entries and provides the default exception handlers.
Caller should try to get an array of interrupt and/or exception vectors that are in use and need to
persist by EFI_VECTOR_HANDOFF_INFO defined in PI 1.3 specification.
If caller cannot get reserved vector list or it does not exists, set VectorInfo to NULL.
If VectorInfo is not NULL, the exception vectors will be initialized per vector attribute accordingly.
Note: Before invoking this API, caller must allocate memory for IDT table and load
IDTR by AsmWriteIdtr().
@param[in] VectorInfo Pointer to reserved vector list.
@retval EFI_SUCCESS CPU Exception Entries have been successfully initialized
with default exception handlers.
@retval EFI_INVALID_PARAMETER VectorInfo includes the invalid content if VectorInfo is not NULL.
@retval EFI_UNSUPPORTED This function is not supported.
**/
EFI_STATUS
EFIAPI
InitializeCpuExceptionHandlers (
IN EFI_VECTOR_HANDOFF_INFO *VectorInfo OPTIONAL
)
{
EFI_STATUS Status;
EXCEPTION_HANDLER_DATA *ExceptionHandlerData;
RESERVED_VECTORS_DATA *ReservedVectors;
ReservedVectors = AllocatePool (sizeof (RESERVED_VECTORS_DATA) * CPU_EXCEPTION_NUM);
ASSERT (ReservedVectors != NULL);
ExceptionHandlerData = AllocatePool (sizeof (EXCEPTION_HANDLER_DATA));
ASSERT (ExceptionHandlerData != NULL);
ExceptionHandlerData->ReservedVectors = ReservedVectors;
ExceptionHandlerData->ExternalInterruptHandler = NULL;
InitializeSpinLock (&ExceptionHandlerData->DisplayMessageSpinLock);
Status = InitializeCpuExceptionHandlersWorker (VectorInfo, ExceptionHandlerData);
if (EFI_ERROR (Status)) {
FreePool (ReservedVectors);
FreePool (ExceptionHandlerData);
return Status;
}
//
// Build location of CPU MP DATA buffer in HOB
//
BuildGuidDataHob (
&mCpuExceptrionHandlerLibHobGuid,
(VOID *)&ExceptionHandlerData,
sizeof(UINT64)
);
return EFI_SUCCESS;
}
/**
Initializes all CPU interrupt/exceptions entries and provides the default interrupt/exception handlers.
Caller should try to get an array of interrupt and/or exception vectors that are in use and need to
persist by EFI_VECTOR_HANDOFF_INFO defined in PI 1.3 specification.
If caller cannot get reserved vector list or it does not exists, set VectorInfo to NULL.
If VectorInfo is not NULL, the exception vectors will be initialized per vector attribute accordingly.
@param[in] VectorInfo Pointer to reserved vector list.
@retval EFI_SUCCESS All CPU interrupt/exception entries have been successfully initialized
with default interrupt/exception handlers.
@retval EFI_INVALID_PARAMETER VectorInfo includes the invalid content if VectorInfo is not NULL.
@retval EFI_UNSUPPORTED This function is not supported.
**/
EFI_STATUS
EFIAPI
InitializeCpuInterruptHandlers (
IN EFI_VECTOR_HANDOFF_INFO *VectorInfo OPTIONAL
)
{
return EFI_UNSUPPORTED;
}
/**
Registers a function to be called from the processor interrupt handler.
This function registers and enables the handler specified by InterruptHandler for a processor
interrupt or exception type specified by InterruptType. If InterruptHandler is NULL, then the
handler for the processor interrupt or exception type specified by InterruptType is uninstalled.
The installed handler is called once for each processor interrupt or exception.
NOTE: This function should be invoked after InitializeCpuExceptionHandlers() or
InitializeCpuInterruptHandlers() invoked, otherwise EFI_UNSUPPORTED returned.
@param[in] InterruptType Defines which interrupt or exception to hook.
@param[in] InterruptHandler A pointer to a function of type EFI_CPU_INTERRUPT_HANDLER that is called
when a processor interrupt occurs. If this parameter is NULL, then the handler
will be uninstalled.
@retval EFI_SUCCESS The handler for the processor interrupt was successfully installed or uninstalled.
@retval EFI_ALREADY_STARTED InterruptHandler is not NULL, and a handler for InterruptType was
previously installed.
@retval EFI_INVALID_PARAMETER InterruptHandler is NULL, and a handler for InterruptType was not
previously installed.
@retval EFI_UNSUPPORTED The interrupt specified by InterruptType is not supported,
or this function is not supported.
**/
EFI_STATUS
EFIAPI
RegisterCpuInterruptHandler (
IN EFI_EXCEPTION_TYPE InterruptType,
IN EFI_CPU_INTERRUPT_HANDLER InterruptHandler
)
{
return EFI_UNSUPPORTED;
}
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