mirror of https://github.com/acidanthera/audk.git
138 lines
5.3 KiB
C
138 lines
5.3 KiB
C
/** @file
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CPU exception handler library implemenation for DXE modules.
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Copyright (c) 2013 - 2022, Intel Corporation. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#include <PiDxe.h>
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#include "CpuExceptionCommon.h"
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#include <Library/DebugLib.h>
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#include <Library/MemoryAllocationLib.h>
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#include <Library/UefiBootServicesTableLib.h>
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CONST UINTN mDoFarReturnFlag = 0;
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RESERVED_VECTORS_DATA mReservedVectorsData[CPU_INTERRUPT_NUM];
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EFI_CPU_INTERRUPT_HANDLER mExternalInterruptHandlerTable[CPU_INTERRUPT_NUM];
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EXCEPTION_HANDLER_DATA mExceptionHandlerData = {
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CPU_INTERRUPT_NUM,
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0, // To be fixed
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mReservedVectorsData,
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mExternalInterruptHandlerTable
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};
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UINT8 mBuffer[CPU_STACK_SWITCH_EXCEPTION_NUMBER * CPU_KNOWN_GOOD_STACK_SIZE
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+ CPU_TSS_GDT_SIZE];
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/**
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Common exception handler.
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@param ExceptionType Exception type.
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@param SystemContext Pointer to EFI_SYSTEM_CONTEXT.
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**/
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VOID
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EFIAPI
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CommonExceptionHandler (
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IN EFI_EXCEPTION_TYPE ExceptionType,
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IN EFI_SYSTEM_CONTEXT SystemContext
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)
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{
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CommonExceptionHandlerWorker (ExceptionType, SystemContext, &mExceptionHandlerData);
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}
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/**
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Initializes all CPU exceptions entries and provides the default exception handlers.
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Caller should try to get an array of interrupt and/or exception vectors that are in use and need to
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persist by EFI_VECTOR_HANDOFF_INFO defined in PI 1.3 specification.
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If caller cannot get reserved vector list or it does not exists, set VectorInfo to NULL.
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If VectorInfo is not NULL, the exception vectors will be initialized per vector attribute accordingly.
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@param[in] VectorInfo Pointer to reserved vector list.
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@retval EFI_SUCCESS CPU Exception Entries have been successfully initialized
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with default exception handlers.
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@retval EFI_INVALID_PARAMETER VectorInfo includes the invalid content if VectorInfo is not NULL.
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@retval EFI_UNSUPPORTED This function is not supported.
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**/
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EFI_STATUS
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EFIAPI
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InitializeCpuExceptionHandlers (
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IN EFI_VECTOR_HANDOFF_INFO *VectorInfo OPTIONAL
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)
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{
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InitializeSpinLock (&mExceptionHandlerData.DisplayMessageSpinLock);
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return InitializeCpuExceptionHandlersWorker (VectorInfo, &mExceptionHandlerData);
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}
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/**
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Registers a function to be called from the processor interrupt handler.
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This function registers and enables the handler specified by InterruptHandler for a processor
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interrupt or exception type specified by InterruptType. If InterruptHandler is NULL, then the
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handler for the processor interrupt or exception type specified by InterruptType is uninstalled.
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The installed handler is called once for each processor interrupt or exception.
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NOTE: This function should be invoked after InitializeCpuExceptionHandlers() is invoked,
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otherwise EFI_UNSUPPORTED returned.
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@param[in] InterruptType Defines which interrupt or exception to hook.
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@param[in] InterruptHandler A pointer to a function of type EFI_CPU_INTERRUPT_HANDLER that is called
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when a processor interrupt occurs. If this parameter is NULL, then the handler
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will be uninstalled.
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@retval EFI_SUCCESS The handler for the processor interrupt was successfully installed or uninstalled.
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@retval EFI_ALREADY_STARTED InterruptHandler is not NULL, and a handler for InterruptType was
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previously installed.
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@retval EFI_INVALID_PARAMETER InterruptHandler is NULL, and a handler for InterruptType was not
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previously installed.
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@retval EFI_UNSUPPORTED The interrupt specified by InterruptType is not supported,
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or this function is not supported.
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**/
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EFI_STATUS
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EFIAPI
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RegisterCpuInterruptHandler (
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IN EFI_EXCEPTION_TYPE InterruptType,
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IN EFI_CPU_INTERRUPT_HANDLER InterruptHandler
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)
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{
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return RegisterCpuInterruptHandlerWorker (InterruptType, InterruptHandler, &mExceptionHandlerData);
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}
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/**
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Setup separate stacks for certain exception handlers.
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If the input Buffer and BufferSize are both NULL, use global variable if possible.
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@param[in] Buffer Point to buffer used to separate exception stack.
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@param[in, out] BufferSize On input, it indicates the byte size of Buffer.
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If the size is not enough, the return status will
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be EFI_BUFFER_TOO_SMALL, and output BufferSize
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will be the size it needs.
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@retval EFI_SUCCESS The stacks are assigned successfully.
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@retval EFI_UNSUPPORTED This function is not supported.
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@retval EFI_BUFFER_TOO_SMALL This BufferSize is too small.
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**/
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EFI_STATUS
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EFIAPI
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InitializeSeparateExceptionStacks (
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IN VOID *Buffer,
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IN OUT UINTN *BufferSize
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)
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{
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UINTN LocalBufferSize;
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EFI_STATUS Status;
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if ((Buffer == NULL) && (BufferSize == NULL)) {
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SetMem (mBuffer, sizeof (mBuffer), 0);
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LocalBufferSize = sizeof (mBuffer);
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Status = ArchSetupExceptionStack (mBuffer, &LocalBufferSize);
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ASSERT_EFI_ERROR (Status);
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return Status;
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} else {
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return ArchSetupExceptionStack (Buffer, BufferSize);
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}
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}
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