mirror of https://github.com/acidanthera/audk.git
128 lines
3.7 KiB
C
128 lines
3.7 KiB
C
/** @file
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Top level C file for debug support driver. Contains initialization function.
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Copyright (c) 2006 - 2018, 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 "PlDebugSupport.h"
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EFI_DEBUG_SUPPORT_PROTOCOL mDebugSupportProtocolInterface = {
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EFI_ISA,
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GetMaximumProcessorIndex,
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RegisterPeriodicCallback,
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RegisterExceptionCallback,
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InvalidateInstructionCache
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};
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/**
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Debug Support Driver entry point.
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Checks to see if there's not already a Debug Support protocol installed for
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the selected processor before installing it.
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@param[in] ImageHandle The firmware allocated handle for the EFI image.
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@param[in] SystemTable A pointer to the EFI System Table.
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@retval EFI_SUCCESS The entry point is executed successfully.
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@retval EFI_ALREADY_STARTED Debug Support protocol is installed already.
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@retval other Some error occurs when executing this entry point.
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**/
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EFI_STATUS
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EFIAPI
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InitializeDebugSupportDriver (
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IN EFI_HANDLE ImageHandle,
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IN EFI_SYSTEM_TABLE *SystemTable
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)
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{
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EFI_LOADED_IMAGE_PROTOCOL *LoadedImageProtocolPtr;
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EFI_STATUS Status;
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EFI_HANDLE Handle;
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EFI_HANDLE *HandlePtr;
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UINTN NumHandles;
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EFI_DEBUG_SUPPORT_PROTOCOL *DebugSupportProtocolPtr;
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//
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// First check to see that the debug support protocol for this processor
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// type is not already installed
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//
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Status = gBS->LocateHandleBuffer (
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ByProtocol,
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&gEfiDebugSupportProtocolGuid,
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NULL,
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&NumHandles,
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&HandlePtr
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);
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if (Status != EFI_NOT_FOUND) {
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do {
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NumHandles--;
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Status = gBS->OpenProtocol (
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HandlePtr[NumHandles],
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&gEfiDebugSupportProtocolGuid,
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(VOID **) &DebugSupportProtocolPtr,
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ImageHandle,
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NULL,
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EFI_OPEN_PROTOCOL_GET_PROTOCOL
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);
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if ((Status == EFI_SUCCESS) && (DebugSupportProtocolPtr->Isa == EFI_ISA)) {
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//
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// a Debug Support protocol has been installed for this processor
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//
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FreePool (HandlePtr);
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Status = EFI_ALREADY_STARTED;
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goto ErrExit;
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}
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} while (NumHandles > 0);
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FreePool (HandlePtr);
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}
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//
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// Get our image information and install platform specific unload handler
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//
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Status = gBS->OpenProtocol (
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ImageHandle,
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&gEfiLoadedImageProtocolGuid,
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(VOID **) &LoadedImageProtocolPtr,
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ImageHandle,
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NULL,
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EFI_OPEN_PROTOCOL_GET_PROTOCOL
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);
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ASSERT (!EFI_ERROR (Status));
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if (Status != EFI_SUCCESS) {
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goto ErrExit;
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}
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LoadedImageProtocolPtr->Unload = PlUnloadDebugSupportDriver;
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//
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// Call hook for processor specific initialization
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//
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Status = PlInitializeDebugSupportDriver ();
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ASSERT (!EFI_ERROR (Status));
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if (Status != EFI_SUCCESS) {
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goto ErrExit;
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}
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//
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// Install Debug Support protocol to new handle
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//
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Handle = NULL;
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Status = gBS->InstallProtocolInterface (
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&Handle,
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&gEfiDebugSupportProtocolGuid,
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EFI_NATIVE_INTERFACE,
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&mDebugSupportProtocolInterface
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);
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ASSERT (!EFI_ERROR (Status));
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if (Status != EFI_SUCCESS) {
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goto ErrExit;
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}
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ErrExit:
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return Status;
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}
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