1 /* $NetBSD: modelist.c,v 1.1.1.1 2014/04/01 16:16:06 jakllsch Exp $ */ 2 3 #include <efi.h> 4 #include <efilib.h> 5 6 extern EFI_GUID GraphicsOutputProtocol; 7 8 static int memcmp(const void *s1, const void *s2, UINTN n) 9 { 10 const unsigned char *c1 = s1, *c2 = s2; 11 int d = 0; 12 13 if (!s1 && !s2) 14 return 0; 15 if (s1 && !s2) 16 return 1; 17 if (!s1 && s2) 18 return -1; 19 20 while (n--) { 21 d = (int)*c1++ - (int)*c2++; 22 if (d) 23 break; 24 } 25 return d; 26 } 27 28 static void 29 print_modes(EFI_GRAPHICS_OUTPUT_PROTOCOL *gop) 30 { 31 int i, imax; 32 EFI_STATUS rc; 33 34 imax = gop->Mode->MaxMode; 35 36 Print(L"GOP reports MaxMode %d\n", imax); 37 for (i = 0; i < imax; i++) { 38 EFI_GRAPHICS_OUTPUT_MODE_INFORMATION *info; 39 UINTN SizeOfInfo; 40 rc = uefi_call_wrapper(gop->QueryMode, 4, gop, i, &SizeOfInfo, 41 &info); 42 if (EFI_ERROR(rc) && rc == EFI_NOT_STARTED) { 43 rc = uefi_call_wrapper(gop->SetMode, 2, gop, 44 gop->Mode->Mode); 45 rc = uefi_call_wrapper(gop->QueryMode, 4, gop, i, 46 &SizeOfInfo, &info); 47 } 48 49 if (EFI_ERROR(rc)) { 50 CHAR16 Buffer[64]; 51 StatusToString(Buffer, rc); 52 Print(L"%d: Bad response from QueryMode: %s (%d)\n", 53 i, Buffer, rc); 54 continue; 55 } 56 Print(L"%c%d: %dx%d ", memcmp(info,gop->Mode->Info,sizeof(*info)) == 0 ? '*' : ' ', i, 57 info->HorizontalResolution, 58 info->VerticalResolution); 59 switch(info->PixelFormat) { 60 case PixelRedGreenBlueReserved8BitPerColor: 61 Print(L"RGBR"); 62 break; 63 case PixelBlueGreenRedReserved8BitPerColor: 64 Print(L"BGRR"); 65 break; 66 case PixelBitMask: 67 Print(L"R:%08x G:%08x B:%08x X:%08x", 68 info->PixelInformation.RedMask, 69 info->PixelInformation.GreenMask, 70 info->PixelInformation.BlueMask, 71 info->PixelInformation.ReservedMask); 72 break; 73 case PixelBltOnly: 74 Print(L"(blt only)"); 75 break; 76 default: 77 Print(L"(Invalid pixel format)"); 78 break; 79 } 80 Print(L" pitch %d\n", info->PixelsPerScanLine); 81 } 82 } 83 84 static EFI_STATUS 85 SetWatchdog(UINTN seconds) 86 { 87 EFI_STATUS rc; 88 rc = uefi_call_wrapper(BS->SetWatchdogTimer, 4, seconds, 0x1ffff, 89 0, NULL); 90 if (EFI_ERROR(rc)) { 91 CHAR16 Buffer[64]; 92 StatusToString(Buffer, rc); 93 Print(L"Bad response from QueryMode: %s (%d)\n", Buffer, rc); 94 } 95 return rc; 96 } 97 98 EFI_STATUS 99 efi_main (EFI_HANDLE image_handle, EFI_SYSTEM_TABLE *systab) 100 { 101 EFI_STATUS rc; 102 EFI_GRAPHICS_OUTPUT_PROTOCOL *gop; 103 104 InitializeLib(image_handle, systab); 105 106 SetWatchdog(10); 107 108 rc = LibLocateProtocol(&GraphicsOutputProtocol, (void **)&gop); 109 if (EFI_ERROR(rc)) 110 return rc; 111 112 print_modes(gop); 113 114 SetWatchdog(0); 115 return EFI_SUCCESS; 116 } 117