2c3b5ec562
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@2456 6f19259b-4bc3-4df7-8a09-765794883524
152 lines
4.3 KiB
C
152 lines
4.3 KiB
C
/*++
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Copyright (c) 2006, Intel Corporation
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All rights reserved. This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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Module Name:
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DebugSupport.c
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Abstract:
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Top level C file for debug support driver. Contains initialization function.
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Revision History
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--*/
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//
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// private header files
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//
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#include "plDebugSupport.h"
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//
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// This is a global that is the actual interface
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//
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EFI_DEBUG_SUPPORT_PROTOCOL gDebugSupportProtocolInterface = {
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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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// Driver Entry Point
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//
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EFI_STATUS
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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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Routine Description:
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Driver entry point. Checks to see there's not already a DebugSupport protocol
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installed for the selected processor before installing protocol.
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Arguments:
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IN EFI_HANDLE ImageHandle,
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IN EFI_SYSTEM_TABLE *SystemTable
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Returns:
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EFI_STATUS
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--*/
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// TODO: ImageHandle - add argument and description to function comment
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// TODO: SystemTable - add argument and description to function comment
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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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// Install Protocol Interface...
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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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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 platform 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 DebugSupport 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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&gDebugSupportProtocolInterface
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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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