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
14 static EFI_GUID GnuEfiAppsDrv0ProtocolGuid
15 = GNU_EFI_APPS_DRV0_PROTOCOL_GUID;
16
17
18 static
19 EFI_STATUS
PlayWithGnuEfiAppsDrv0Protocol(IN EFI_HANDLE DrvHandle)20 PlayWithGnuEfiAppsDrv0Protocol(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
53 EFI_STATUS
efi_main(EFI_HANDLE Image,EFI_SYSTEM_TABLE * SysTab)54 efi_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