1 /* $NetBSD: modelist.c,v 1.1.1.3 2021/09/30 18:50:09 jmcneill Exp $ */
2
3 #include <efi.h>
4 #include <efilib.h>
5
6 extern EFI_GUID GraphicsOutputProtocol;
7
8 static void
print_modes(EFI_GRAPHICS_OUTPUT_PROTOCOL * gop)9 print_modes(EFI_GRAPHICS_OUTPUT_PROTOCOL *gop)
10 {
11 int i, imax;
12 EFI_STATUS rc;
13
14 if (gop->Mode) {
15 imax = gop->Mode->MaxMode;
16 Print(L"GOP reports MaxMode %d\n", imax);
17 } else {
18 Print(L"gop->Mode is NULL\n");
19 imax = 1;
20 }
21
22 for (i = 0; i < imax; i++) {
23 EFI_GRAPHICS_OUTPUT_MODE_INFORMATION *info;
24 UINTN SizeOfInfo;
25 rc = uefi_call_wrapper(gop->QueryMode, 4, gop, i, &SizeOfInfo,
26 &info);
27 if (rc == EFI_NOT_STARTED) {
28 Print(L"gop->QueryMode() returned %r\n", rc);
29 Print(L"Trying to start GOP with SetMode().\n");
30 rc = uefi_call_wrapper(gop->SetMode, 2, gop,
31 gop->Mode ? gop->Mode->Mode : 0);
32 rc = uefi_call_wrapper(gop->QueryMode, 4, gop, i,
33 &SizeOfInfo, &info);
34 }
35
36 if (EFI_ERROR(rc)) {
37 Print(L"%d: Bad response from QueryMode: %r (%d)\n",
38 i, rc, rc);
39 continue;
40 }
41 Print(L"%c%d: %dx%d ",
42 (gop->Mode &&
43 CompareMem(info,gop->Mode->Info,sizeof(*info)) == 0
44 ) ? '*' : ' ',
45 i, info->HorizontalResolution, info->VerticalResolution);
46 switch(info->PixelFormat) {
47 case PixelRedGreenBlueReserved8BitPerColor:
48 Print(L"RGBR");
49 break;
50 case PixelBlueGreenRedReserved8BitPerColor:
51 Print(L"BGRR");
52 break;
53 case PixelBitMask:
54 Print(L"R:%08x G:%08x B:%08x X:%08x",
55 info->PixelInformation.RedMask,
56 info->PixelInformation.GreenMask,
57 info->PixelInformation.BlueMask,
58 info->PixelInformation.ReservedMask);
59 break;
60 case PixelBltOnly:
61 Print(L"(blt only)");
62 break;
63 default:
64 Print(L"(Invalid pixel format)");
65 break;
66 }
67 Print(L" pitch %d\n", info->PixelsPerScanLine);
68 }
69 }
70
71 static EFI_STATUS
SetWatchdog(UINTN seconds)72 SetWatchdog(UINTN seconds)
73 {
74 EFI_STATUS rc;
75 rc = uefi_call_wrapper(BS->SetWatchdogTimer, 4, seconds, 0x1ffff,
76 0, NULL);
77 if (EFI_ERROR(rc)) {
78 CHAR16 Buffer[64];
79 StatusToString(Buffer, rc);
80 Print(L"Bad response from QueryMode: %s (%d)\n", Buffer, rc);
81 }
82 return rc;
83 }
84
85 EFI_STATUS
efi_main(EFI_HANDLE image_handle,EFI_SYSTEM_TABLE * systab)86 efi_main (EFI_HANDLE image_handle, EFI_SYSTEM_TABLE *systab)
87 {
88 EFI_STATUS rc;
89 EFI_GRAPHICS_OUTPUT_PROTOCOL *gop;
90
91 InitializeLib(image_handle, systab);
92
93 SetWatchdog(10);
94
95 rc = LibLocateProtocol(&GraphicsOutputProtocol, (void **)&gop);
96 if (EFI_ERROR(rc)) {
97 Print(L"Could not locate GOP: %r\n", rc);
98 return rc;
99 }
100
101 if (!gop) {
102 Print(L"LocateProtocol(GOP, &gop) returned %r but GOP is NULL\n", rc);
103 return EFI_UNSUPPORTED;
104 }
105
106 print_modes(gop);
107
108 SetWatchdog(0);
109 return EFI_SUCCESS;
110 }
111