69 lines
1.8 KiB
C
69 lines
1.8 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/modules/blproto.c
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* DESCRIPTION: EFI XTLDR protocol API
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* DEVELOPERS: Rafal Kupiec <belliash@codingworkshop.eu.org>
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*/
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#include <xtbl.h>
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#include <blmod.h>
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/**
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* This routine locates and opens the XT boot loader protocol.
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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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EFI_STATUS
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BlGetXtLoaderProtocol()
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{
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EFI_GUID Guid = XT_BOOT_LOADER_PROTOCOL_GUID;
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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, &Guid, 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], &Guid, (PVOID*)&EfiXtLdrProtocol,
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EfiImageHandle, NULL, 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(EfiXtLdrProtocol == 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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