1 /* 2 * Copyright (C) 2013 David Decotigny <decot (at) googlers.com> 3 * 4 * See drv0.c for an example session. 5 */ 6 7 #include <efi.h> 8 #include <efilib.h> 9 #include "drv0.h" 10 11 12 static EFI_GUID GnuEfiAppsDrv0ProtocolGuid 13 = GNU_EFI_APPS_DRV0_PROTOCOL_GUID; 14 15 16 static 17 EFI_STATUS 18 PlayWithGnuEfiAppsDrv0Protocol(IN EFI_HANDLE DrvHandle) { 19 EFI_STATUS Status; 20 GNU_EFI_APPS_DRV0_PROTOCOL *drv = NULL; 21 UINTN NumberOfHello = 0; 22 23 Status = uefi_call_wrapper(BS->OpenProtocol, 6, 24 DrvHandle, 25 &GnuEfiAppsDrv0ProtocolGuid, 26 &drv, 27 DrvHandle, 28 NULL, 29 EFI_OPEN_PROTOCOL_GET_PROTOCOL); 30 if (EFI_ERROR(Status)) { 31 Print(L"Cannot open proto: %d\n", Status); 32 return Status; 33 } 34 35 Status = uefi_call_wrapper(drv->SayHello, 2, drv, L"Sample UEFI Driver"); 36 if (EFI_ERROR(Status)) { 37 Print(L"Cannot call SayHello: %d\n", Status); 38 } 39 40 Status = uefi_call_wrapper(drv->GetNumberOfHello, 2, drv, &NumberOfHello); 41 if (EFI_ERROR(Status)) { 42 Print(L"Cannot call GetNumberOfHello: %d\n", Status); 43 } else { 44 Print(L"Hello was called %d time(s).\n", NumberOfHello); 45 } 46 47 return EFI_SUCCESS; 48 } 49 50 51 EFI_STATUS 52 efi_main (EFI_HANDLE Image, EFI_SYSTEM_TABLE *SysTab) 53 { 54 EFI_STATUS Status; 55 EFI_HANDLE *Handles = NULL; 56 UINTN i, NoHandles = 0; 57 58 InitializeLib(Image, SysTab); 59 60 Status = LibLocateHandle(ByProtocol, &GnuEfiAppsDrv0ProtocolGuid, 61 NULL, &NoHandles, &Handles); 62 if (EFI_ERROR(Status)) { 63 Print(L"Error looking up handles for proto: %d\n", Status); 64 return Status; 65 } 66 67 for (i = 0 ; i < NoHandles ; ++i) 68 { 69 Print(L"Playing with driver instance %d...\n", i); 70 Status = PlayWithGnuEfiAppsDrv0Protocol(Handles[i]); 71 if (EFI_ERROR(Status)) 72 Print(L"Error playing with instance %d, skipping\n", i); 73 } 74 75 if (Handles) 76 FreePool(Handles); 77 78 return EFI_SUCCESS; 79 } 80
