mirror of https://github.com/acidanthera/audk.git
263 lines
10 KiB
C
263 lines
10 KiB
C
/** @file
|
|
CPU exception handler library implementation for PEIM module.
|
|
|
|
Copyright (c) 2016 - 2018, Intel Corporation. All rights reserved.<BR>
|
|
SPDX-License-Identifier: BSD-2-Clause-Patent
|
|
|
|
**/
|
|
|
|
#include <PiPei.h>
|
|
#include "CpuExceptionCommon.h"
|
|
#include <Library/DebugLib.h>
|
|
#include <Library/HobLib.h>
|
|
#include <Library/MemoryAllocationLib.h>
|
|
#include <Library/PcdLib.h>
|
|
|
|
CONST UINTN mDoFarReturnFlag = 0;
|
|
|
|
typedef struct {
|
|
UINT8 ExceptionStubHeader[HOOKAFTER_STUB_SIZE];
|
|
EXCEPTION_HANDLER_DATA *ExceptionHandlerData;
|
|
} EXCEPTION0_STUB_HEADER;
|
|
|
|
/**
|
|
Get exception handler data pointer from IDT[0].
|
|
|
|
The exception #0 stub header is duplicated in an allocated pool with extra 4-byte/8-byte to store the
|
|
exception handler data. The new allocated memory layout follows structure EXCEPTION0_STUB_HEADER.
|
|
The code assumes that all processors uses the same exception handler for #0 exception.
|
|
|
|
@return pointer to exception handler data.
|
|
**/
|
|
EXCEPTION_HANDLER_DATA *
|
|
GetExceptionHandlerData (
|
|
VOID
|
|
)
|
|
{
|
|
IA32_DESCRIPTOR IdtDescriptor;
|
|
IA32_IDT_GATE_DESCRIPTOR *IdtTable;
|
|
EXCEPTION0_STUB_HEADER *Exception0StubHeader;
|
|
|
|
AsmReadIdtr (&IdtDescriptor);
|
|
IdtTable = (IA32_IDT_GATE_DESCRIPTOR *)IdtDescriptor.Base;
|
|
|
|
Exception0StubHeader = (EXCEPTION0_STUB_HEADER *)ArchGetIdtHandler (&IdtTable[0]);
|
|
return Exception0StubHeader->ExceptionHandlerData;
|
|
}
|
|
|
|
/**
|
|
Set exception handler data pointer to IDT[0].
|
|
|
|
The exception #0 stub header is duplicated in an allocated pool with extra 4-byte/8-byte to store the
|
|
exception handler data. The new allocated memory layout follows structure EXCEPTION0_STUB_HEADER.
|
|
The code assumes that all processors uses the same exception handler for #0 exception.
|
|
|
|
@param ExceptionHandlerData pointer to exception handler data.
|
|
**/
|
|
VOID
|
|
SetExceptionHandlerData (
|
|
IN EXCEPTION_HANDLER_DATA *ExceptionHandlerData
|
|
)
|
|
{
|
|
EXCEPTION0_STUB_HEADER *Exception0StubHeader;
|
|
IA32_DESCRIPTOR IdtDescriptor;
|
|
IA32_IDT_GATE_DESCRIPTOR *IdtTable;
|
|
//
|
|
// Duplicate the exception #0 stub header in pool and cache the ExceptionHandlerData just after the stub header.
|
|
// So AP can get the ExceptionHandlerData by reading the IDT[0].
|
|
//
|
|
AsmReadIdtr (&IdtDescriptor);
|
|
IdtTable = (IA32_IDT_GATE_DESCRIPTOR *)IdtDescriptor.Base;
|
|
|
|
Exception0StubHeader = AllocatePool (sizeof (*Exception0StubHeader));
|
|
ASSERT (Exception0StubHeader != NULL);
|
|
CopyMem (
|
|
Exception0StubHeader->ExceptionStubHeader,
|
|
(VOID *)ArchGetIdtHandler (&IdtTable[0]),
|
|
sizeof (Exception0StubHeader->ExceptionStubHeader)
|
|
);
|
|
Exception0StubHeader->ExceptionHandlerData = ExceptionHandlerData;
|
|
ArchUpdateIdtEntry (&IdtTable[0], (UINTN)Exception0StubHeader->ExceptionStubHeader);
|
|
}
|
|
|
|
/**
|
|
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;
|
|
}
|
|
|
|
SetExceptionHandlerData (ExceptionHandlerData);
|
|
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;
|
|
}
|
|
|
|
/**
|
|
Initializes all CPU exceptions entries with optional extra initializations.
|
|
|
|
By default, this method should include all functionalities implemented by
|
|
InitializeCpuExceptionHandlers(), plus extra initialization works, if any.
|
|
This could be done by calling InitializeCpuExceptionHandlers() directly
|
|
in this method besides the extra works.
|
|
|
|
InitData is optional and its use and content are processor arch dependent.
|
|
The typical usage of it is to convey resources which have to be reserved
|
|
elsewhere and are necessary for the extra initializations of exception.
|
|
|
|
@param[in] VectorInfo Pointer to reserved vector list.
|
|
@param[in] InitData Pointer to data optional for extra initializations
|
|
of exception.
|
|
|
|
@retval EFI_SUCCESS The exceptions have been successfully
|
|
initialized.
|
|
@retval EFI_INVALID_PARAMETER VectorInfo or InitData contains invalid
|
|
content.
|
|
|
|
**/
|
|
EFI_STATUS
|
|
EFIAPI
|
|
InitializeCpuExceptionHandlersEx (
|
|
IN EFI_VECTOR_HANDOFF_INFO *VectorInfo OPTIONAL,
|
|
IN CPU_EXCEPTION_INIT_DATA *InitData OPTIONAL
|
|
)
|
|
{
|
|
EFI_STATUS Status;
|
|
|
|
//
|
|
// To avoid repeat initialization of default handlers, the caller should pass
|
|
// an extended init data with InitDefaultHandlers set to FALSE. There's no
|
|
// need to call this method to just initialize default handlers. Call non-ex
|
|
// version instead; or this method must be implemented as a simple wrapper of
|
|
// non-ex version of it, if this version has to be called.
|
|
//
|
|
if (InitData == NULL || InitData->Ia32.InitDefaultHandlers) {
|
|
Status = InitializeCpuExceptionHandlers (VectorInfo);
|
|
} else {
|
|
Status = EFI_SUCCESS;
|
|
}
|
|
|
|
if (!EFI_ERROR (Status)) {
|
|
//
|
|
// Initializing stack switch is only necessary for Stack Guard functionality.
|
|
//
|
|
if (PcdGetBool (PcdCpuStackGuard) && InitData != NULL) {
|
|
Status = ArchSetupExceptionStack (InitData);
|
|
}
|
|
}
|
|
|
|
return Status;
|
|
}
|