1/* $NetBSD: drv0_use.c,v 1.1.1.1 2018/08/16 18:17:47 jmcneill Exp $ */ 2 3/* 4 * Copyright (C) 2013 David Decotigny <decot@googlers.com> 5 * 6 * See drv0.c for an example session. 7 */ 8 9#include <efi.h> 10#include <efilib.h> 11#include "drv0.h" 12 13 14static EFI_GUID GnuEfiAppsDrv0ProtocolGuid 15 = GNU_EFI_APPS_DRV0_PROTOCOL_GUID; 16 17 18static 19EFI_STATUS 20PlayWithGnuEfiAppsDrv0Protocol(IN EFI_HANDLE DrvHandle) { 21 EFI_STATUS Status; 22 GNU_EFI_APPS_DRV0_PROTOCOL *drv = NULL; 23 UINTN NumberOfHello = 0; 24 25 Status = uefi_call_wrapper(BS->OpenProtocol, 6, 26 DrvHandle, 27 &GnuEfiAppsDrv0ProtocolGuid, 28 (void**)&drv, 29 DrvHandle, 30 NULL, 31 EFI_OPEN_PROTOCOL_GET_PROTOCOL); 32 if (EFI_ERROR(Status)) { 33 Print(L"Cannot open proto: %d\n", Status); 34 return Status; 35 } 36 37 Status = uefi_call_wrapper(drv->SayHello, 2, L"Sample UEFI Driver"); 38 if (EFI_ERROR(Status)) { 39 Print(L"Cannot call SayHello: %d\n", Status); 40 } 41 42 Status = uefi_call_wrapper(drv->GetNumberOfHello, 2, &NumberOfHello); 43 if (EFI_ERROR(Status)) { 44 Print(L"Cannot call GetNumberOfHello: %d\n", Status); 45 } else { 46 Print(L"Hello was called %d time(s).\n", NumberOfHello); 47 } 48 49 return EFI_SUCCESS; 50} 51 52 53EFI_STATUS 54efi_main (EFI_HANDLE Image, EFI_SYSTEM_TABLE *SysTab) 55{ 56 EFI_STATUS Status; 57 EFI_HANDLE *Handles = NULL; 58 UINTN i, NoHandles = 0; 59 60 InitializeLib(Image, SysTab); 61 62 Status = LibLocateHandle(ByProtocol, &GnuEfiAppsDrv0ProtocolGuid, 63 NULL, &NoHandles, &Handles); 64 if (EFI_ERROR(Status)) { 65 Print(L"Error looking up handles for proto: %d\n", Status); 66 return Status; 67 } 68 69 for (i = 0 ; i < NoHandles ; ++i) 70 { 71 Print(L"Playing with driver instance %d...\n", i); 72 Status = PlayWithGnuEfiAppsDrv0Protocol(Handles[i]); 73 if (EFI_ERROR(Status)) 74 Print(L"Error playing with instance %d, skipping\n", i); 75 } 76 77 if (Handles) 78 FreePool(Handles); 79 80 return EFI_SUCCESS; 81} 82