110 lines
3.3 KiB
C
110 lines
3.3 KiB
C
/**
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* PROJECT: ExectOS
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* COPYRIGHT: See COPYING.md in the top level directory
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* FILE: xtldr/protocol.c
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* DESCRIPTION: XT Boot Loader protocol support
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* DEVELOPERS: Rafal Kupiec <belliash@codingworkshop.eu.org>
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*/
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#include <xtldr.h>
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/**
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* This routine locates and opens the requested XT boot loader protocol.
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*
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* @param ProtocolHandler
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* Supplies the address where a pointer to the opened protocol is returned.
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*
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* @param ProtocolGuid
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* Supplies a pointer to the unique protocol GUID.
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*
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* @return This routine returns status code.
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*
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* @since XT 1.0
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*/
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XTCDECL
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EFI_STATUS
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BlOpenXtProtocol(OUT PVOID *ProtocolHandler,
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IN PEFI_GUID ProtocolGuid)
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{
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PEFI_HANDLE Handles = NULL;
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EFI_STATUS Status;
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UINT_PTR Count;
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UINT Index;
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/* Try to locate the handles */
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Status = EfiSystemTable->BootServices->LocateHandleBuffer(ByProtocol, ProtocolGuid, NULL, &Count, &Handles);
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if(Status != STATUS_EFI_SUCCESS)
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{
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/* Unable to get handles */
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return Status;
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}
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/* Check if any handles returned */
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if(Count > 0)
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{
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/* Iterate through all given handles */
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for(Index = 0; Index < Count; Index++)
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{
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/* Try to open protocol */
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Status = EfiSystemTable->BootServices->OpenProtocol(Handles[Index], ProtocolGuid,
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ProtocolHandler, EfiImageHandle, NULL,
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EFI_OPEN_PROTOCOL_BY_HANDLE_PROTOCOL);
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/* Check if successfully opened the loader protocol */
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if(Status == STATUS_EFI_SUCCESS)
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{
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/* Protocol found and successfully opened */
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break;
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}
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}
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}
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/* Free handles */
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EfiSystemTable->BootServices->FreePool(Handles);
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/* Make sure the loaded protocol has been found */
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if(*ProtocolHandler == NULL)
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{
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/* Protocol not found */
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return STATUS_EFI_NOT_FOUND;
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}
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/* Return success */
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return STATUS_EFI_SUCCESS;
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}
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/**
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* This routine registers XTLDR protocol for further usage by modules.
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*
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* @return This routine returns status code.
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*
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* @since XT 1.0
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*/
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XTCDECL
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EFI_STATUS
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BlpRegisterXtLoaderProtocol()
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{
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EFI_GUID Guid = XT_BOOT_LOADER_PROTOCOL_GUID;
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XTBL_LOADER_PROTOCOL LdrProtocol;
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EFI_HANDLE Handle = NULL;
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/* Set all routines available via loader protocol */
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LdrProtocol.Console.ClearScreen = BlConsoleClearScreen;
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LdrProtocol.Console.DisableCursor = BlConsoleDisableCursor;
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LdrProtocol.Console.EnableCursor = BlConsoleEnableCursor;
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LdrProtocol.Console.Print = BlConsolePrint;
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LdrProtocol.Debug.Print = BlDebugPrint;
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LdrProtocol.Memory.AllocatePages = BlMemoryAllocatePages;
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LdrProtocol.Memory.AllocatePool = BlMemoryAllocatePool;
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LdrProtocol.Memory.FreePages = BlMemoryFreePages;
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LdrProtocol.Memory.FreePool = BlMemoryFreePool;
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LdrProtocol.Protocol.Open = BlOpenXtProtocol;
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LdrProtocol.Util.ExitBootServices = BlExitBootServices;
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LdrProtocol.Util.SleepExecution = BlSleepExecution;
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/* Register XTLDR loader protocol */
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BlDebugPrint(L"Registering XT loader protocol\n");
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return EfiSystemTable->BootServices->InstallProtocolInterface(&Handle, &Guid, EFI_NATIVE_INTERFACE, &LdrProtocol);
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}
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