| /* |
| * Copyright (C) 2013 David Decotigny <decot@googlers.com> |
| * |
| * See drv0.c for an example session. |
| */ |
| |
| #include <efi.h> |
| #include <efilib.h> |
| #include "drv0.h" |
| |
| |
| static EFI_GUID GnuEfiAppsDrv0ProtocolGuid |
| = GNU_EFI_APPS_DRV0_PROTOCOL_GUID; |
| |
| |
| static |
| EFI_STATUS |
| PlayWithGnuEfiAppsDrv0Protocol(IN EFI_HANDLE DrvHandle) { |
| EFI_STATUS Status; |
| GNU_EFI_APPS_DRV0_PROTOCOL *drv = NULL; |
| UINTN NumberOfHello = 0; |
| |
| Status = uefi_call_wrapper(BS->OpenProtocol, 6, |
| DrvHandle, |
| &GnuEfiAppsDrv0ProtocolGuid, |
| &drv, |
| DrvHandle, |
| NULL, |
| EFI_OPEN_PROTOCOL_GET_PROTOCOL); |
| if (EFI_ERROR(Status)) { |
| Print(L"Cannot open proto: %d\n", Status); |
| return Status; |
| } |
| |
| Status = uefi_call_wrapper(drv->SayHello, 2, drv, L"Sample UEFI Driver"); |
| if (EFI_ERROR(Status)) { |
| Print(L"Cannot call SayHello: %d\n", Status); |
| } |
| |
| Status = uefi_call_wrapper(drv->GetNumberOfHello, 2, drv, &NumberOfHello); |
| if (EFI_ERROR(Status)) { |
| Print(L"Cannot call GetNumberOfHello: %d\n", Status); |
| } else { |
| Print(L"Hello was called %d time(s).\n", NumberOfHello); |
| } |
| |
| return EFI_SUCCESS; |
| } |
| |
| |
| EFI_STATUS |
| efi_main (EFI_HANDLE Image, EFI_SYSTEM_TABLE *SysTab) |
| { |
| EFI_STATUS Status; |
| EFI_HANDLE *Handles = NULL; |
| UINTN i, NoHandles = 0; |
| |
| InitializeLib(Image, SysTab); |
| |
| Status = LibLocateHandle(ByProtocol, &GnuEfiAppsDrv0ProtocolGuid, |
| NULL, &NoHandles, &Handles); |
| if (EFI_ERROR(Status)) { |
| Print(L"Error looking up handles for proto: %d\n", Status); |
| return Status; |
| } |
| |
| for (i = 0 ; i < NoHandles ; ++i) |
| { |
| Print(L"Playing with driver instance %d...\n", i); |
| Status = PlayWithGnuEfiAppsDrv0Protocol(Handles[i]); |
| if (EFI_ERROR(Status)) |
| Print(L"Error playing with instance %d, skipping\n", i); |
| } |
| |
| if (Handles) |
| FreePool(Handles); |
| |
| return EFI_SUCCESS; |
| } |