audk/MdeModulePkg/Universal/DebugSupportDxe/Ipf/PlDebugSupport.h

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/** @file
IPF specific types, macros, and definitions for Debug Support Driver.
Copyright (c) 2004 - 2010, Intel Corporation
All rights reserved. This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which 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.
**/
#ifndef _PLDEBUG_SUPPORT_H_
#define _PLDEBUG_SUPPORT_H_
#include <Uefi.h>
#include <Protocol/DebugSupport.h>
#include <Protocol/LoadedImage.h>
#include <Library/DebugLib.h>
#include <Library/UefiDriverEntryPoint.h>
#include <Library/BaseMemoryLib.h>
#include <Library/MemoryAllocationLib.h>
#include <Library/UefiBootServicesTableLib.h>
#define DISABLE_INTERRUPTS 0UL
#define EFI_ISA IsaIpf
typedef struct {
UINT64 Low;
UINT64 High;
} BUNDLE;
typedef
VOID
(*CALLBACK_FUNC) (
);
/**
IPF specific DebugSupport driver initialization.
Must be public because it's referenced from DebugSupport.c
@retval EFI_SUCCESS Always.
**/
EFI_STATUS
PlInitializeDebugSupportDriver (
VOID
);
/**
Unload handler that is called during UnloadImage() - deallocates pool memory
used by the driver.
Must be public because it's referenced from DebugSuport.c
@param ImageHandle The firmware allocated handle for the EFI image.
@retval EFI_SUCCESS Always.
**/
EFI_STATUS
EFIAPI
PlUnloadDebugSupportDriver (
IN EFI_HANDLE ImageHandle
);
/**
C callable function to obtain the current value of IVA.
@return Current value of IVA.
**/
VOID *
GetIva (
VOID
);
/**
C callable function that HookStub will be copied from it's loaded location into the IVT when
an IVT entry is hooked.
**/
VOID
HookStub (
VOID
);
/**
C callable function to chain an interrupt handler.
**/
VOID
ChainHandler (
VOID
);
/**
C callable function to unchain an interrupt handler.
**/
VOID
UnchainHandler (
VOID
);
/**
C callable function to enable/disable interrupts.
@param NewInterruptState New Interrupt State.
@return Previous state of psr.ic.
**/
UINT64
ProgramInterruptFlags (
IN UINT64 NewInterruptState
);
/**
Flushes instruction cache for specified number of bytes.
@param StartAddress Cache Start Address.
@param SizeInBytes Cache Size.
**/
VOID
InstructionCacheFlush (
IN VOID *StartAddress,
IN UINTN SizeInBytes
);
/**
Returns the maximum value that may be used for the ProcessorIndex parameter in
RegisterPeriodicCallback() and RegisterExceptionCallback().
Hard coded to support only 1 processor for now.
@param This A pointer to the EFI_DEBUG_SUPPORT_PROTOCOL instance.
@param MaxProcessorIndex Pointer to a caller-allocated UINTN in which the maximum supported
processor index is returned. Always 0 returned.
@retval EFI_SUCCESS Always returned with **MaxProcessorIndex set to 0.
**/
EFI_STATUS
EFIAPI
GetMaximumProcessorIndex (
IN EFI_DEBUG_SUPPORT_PROTOCOL *This,
OUT UINTN *MaxProcessorIndex
);
/**
Registers a function to be called back periodically in interrupt context.
@param This A pointer to the EFI_DEBUG_SUPPORT_PROTOCOL instance.
@param ProcessorIndex Specifies which processor the callback function applies to.
@param PeriodicCallback A pointer to a function of type PERIODIC_CALLBACK that is the main
periodic entry point of the debug agent.
@retval EFI_SUCCESS The function completed successfully.
@retval EFI_ALREADY_STARTED Non-NULL PeriodicCallback parameter when a callback
function was previously registered.
@retval EFI_OUT_OF_RESOURCES System has insufficient memory resources to register new callback
function.
**/
EFI_STATUS
EFIAPI
RegisterPeriodicCallback (
IN EFI_DEBUG_SUPPORT_PROTOCOL *This,
IN UINTN ProcessorIndex,
IN EFI_PERIODIC_CALLBACK PeriodicCallback
);
/**
Registers a function to be called when a given processor exception occurs.
This code executes in boot services context.
@param This A pointer to the EFI_DEBUG_SUPPORT_PROTOCOL instance.
@param ProcessorIndex Specifies which processor the callback function applies to.
@param ExceptionCallback A pointer to a function of type EXCEPTION_CALLBACK that is called
when the processor exception specified by ExceptionType occurs.
@param ExceptionType Specifies which processor exception to hook.
@retval EFI_SUCCESS The function completed successfully.
@retval EFI_ALREADY_STARTED Non-NULL PeriodicCallback parameter when a callback
function was previously registered.
@retval EFI_OUT_OF_RESOURCES System has insufficient memory resources to register new callback
function.
**/
EFI_STATUS
EFIAPI
RegisterExceptionCallback (
IN EFI_DEBUG_SUPPORT_PROTOCOL *This,
IN UINTN ProcessorIndex,
IN EFI_EXCEPTION_CALLBACK ExceptionCallback,
IN EFI_EXCEPTION_TYPE ExceptionType
);
/**
Invalidates processor instruction cache for a memory range. Subsequent execution in this range
causes a fresh memory fetch to retrieve code to be executed.
@param This A pointer to the EFI_DEBUG_SUPPORT_PROTOCOL instance.
@param ProcessorIndex Specifies which processor's instruction cache is to be invalidated.
@param Start Specifies the physical base of the memory range to be invalidated.
@param Length Specifies the minimum number of bytes in the processor's instruction
cache to invalidate.
@retval EFI_SUCCESS Always returned.
**/
EFI_STATUS
EFIAPI
InvalidateInstructionCache (
IN EFI_DEBUG_SUPPORT_PROTOCOL *This,
IN UINTN ProcessorIndex,
IN VOID *Start,
IN UINTN Length
);
/**
C routine that is called for all registered exceptions. This is the main
exception dispatcher.
Must be public because it's referenced from AsmFuncs.s.
@param ExceptionType Specifies which processor exception.
@param Context System Context.
**/
VOID
CommonHandler (
IN EFI_EXCEPTION_TYPE ExceptionType,
IN EFI_SYSTEM_CONTEXT Context
);
/**
This is the worker function that uninstalls and removes all handlers.
@param ExceptionType Specifies which processor exception.
@param NewBundles New Boundles.
@param NewCallback A pointer to the new function to be registered.
@retval EFI_ALEADY_STARTED Ivt already hooked.
@retval EFI_SUCCESS Successfully uninstalled.
**/
EFI_STATUS
ManageIvtEntryTable (
IN EFI_EXCEPTION_TYPE ExceptionType,
IN BUNDLE NewBundles[4],
IN CALLBACK_FUNC NewCallback
);
/**
Saves original IVT contents and inserts a few new bundles which are fixed up
to store the ExceptionType and then call the common handler.
@param ExceptionType Specifies which processor exception.
@param NewBundles New Boundles.
@param NewCallback A pointer to the new function to be hooked.
**/
VOID
HookEntry (
IN EFI_EXCEPTION_TYPE ExceptionType,
IN BUNDLE NewBundles[4],
IN CALLBACK_FUNC NewCallback
);
/**
Restores original IVT contents when unregistering a callback function.
@param ExceptionType Specifies which processor exception.
**/
VOID
UnhookEntry (
IN EFI_EXCEPTION_TYPE ExceptionType
);
/**
Sets up cache flush and calls assembly function to chain external interrupt.
Records new callback in IvtEntryTable.
@param NewCallback A pointer to the interrupt handle.
**/
VOID
ChainExternalInterrupt (
IN CALLBACK_FUNC NewCallback
);
/**
Sets up cache flush and calls assembly function to restore external interrupt.
Removes registered callback from IvtEntryTable.
**/
VOID
UnchainExternalInterrupt (
VOID
);
/**
Given an integer number, return the physical address of the entry point in the IFT.
@param HandlerIndex Index of the Handler
@param EntryPoint IFT Entrypoint
**/
VOID
GetHandlerEntryPoint (
UINTN HandlerIndex,
VOID **EntryPoint
);
#endif