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