diff options
Diffstat (limited to 'gnu-efi/gnu-efi-3.0/apps/modelist.c')
-rw-r--r-- | gnu-efi/gnu-efi-3.0/apps/modelist.c | 114 |
1 files changed, 114 insertions, 0 deletions
diff --git a/gnu-efi/gnu-efi-3.0/apps/modelist.c b/gnu-efi/gnu-efi-3.0/apps/modelist.c new file mode 100644 index 0000000..8d816d1 --- /dev/null +++ b/gnu-efi/gnu-efi-3.0/apps/modelist.c @@ -0,0 +1,114 @@ +#include <efi.h> +#include <efilib.h> + +extern EFI_GUID GraphicsOutputProtocol; + +static int memcmp(const void *s1, const void *s2, UINTN n) +{ + const unsigned char *c1 = s1, *c2 = s2; + int d = 0; + + if (!s1 && !s2) + return 0; + if (s1 && !s2) + return 1; + if (!s1 && s2) + return -1; + + while (n--) { + d = (int)*c1++ - (int)*c2++; + if (d) + break; + } + return d; +} + +static void +print_modes(EFI_GRAPHICS_OUTPUT_PROTOCOL *gop) +{ + int i, imax; + EFI_STATUS rc; + + imax = gop->Mode->MaxMode; + + Print(L"GOP reports MaxMode %d\n", imax); + for (i = 0; i < imax; i++) { + EFI_GRAPHICS_OUTPUT_MODE_INFORMATION *info; + UINTN SizeOfInfo; + rc = uefi_call_wrapper(gop->QueryMode, 4, gop, i, &SizeOfInfo, + &info); + if (EFI_ERROR(rc) && rc == EFI_NOT_STARTED) { + rc = uefi_call_wrapper(gop->SetMode, 2, gop, + gop->Mode->Mode); + rc = uefi_call_wrapper(gop->QueryMode, 4, gop, i, + &SizeOfInfo, &info); + } + + if (EFI_ERROR(rc)) { + CHAR16 Buffer[64]; + StatusToString(Buffer, rc); + Print(L"%d: Bad response from QueryMode: %s (%d)\n", + i, Buffer, rc); + continue; + } + Print(L"%c%d: %dx%d ", memcmp(info,gop->Mode->Info,sizeof(*info)) == 0 ? '*' : ' ', i, + info->HorizontalResolution, + info->VerticalResolution); + switch(info->PixelFormat) { + case PixelRedGreenBlueReserved8BitPerColor: + Print(L"RGBR"); + break; + case PixelBlueGreenRedReserved8BitPerColor: + Print(L"BGRR"); + break; + case PixelBitMask: + Print(L"R:%08x G:%08x B:%08x X:%08x", + info->PixelInformation.RedMask, + info->PixelInformation.GreenMask, + info->PixelInformation.BlueMask, + info->PixelInformation.ReservedMask); + break; + case PixelBltOnly: + Print(L"(blt only)"); + break; + default: + Print(L"(Invalid pixel format)"); + break; + } + Print(L" pitch %d\n", info->PixelsPerScanLine); + } +} + +static EFI_STATUS +SetWatchdog(UINTN seconds) +{ + EFI_STATUS rc; + rc = uefi_call_wrapper(BS->SetWatchdogTimer, 4, seconds, 0x1ffff, + 0, NULL); + if (EFI_ERROR(rc)) { + CHAR16 Buffer[64]; + StatusToString(Buffer, rc); + Print(L"Bad response from QueryMode: %s (%d)\n", Buffer, rc); + } + return rc; +} + +EFI_STATUS +efi_main (EFI_HANDLE image_handle, EFI_SYSTEM_TABLE *systab) +{ + EFI_STATUS rc; + EFI_GRAPHICS_OUTPUT_PROTOCOL *gop; + + InitializeLib(image_handle, systab); + + SetWatchdog(10); + + rc = LibLocateProtocol(&GraphicsOutputProtocol, (void **)&gop); + if (EFI_ERROR(rc)) + return rc; + + print_modes(gop); + + SetWatchdog(0); + return EFI_SUCCESS; +} |