1 files changed, 108 insertions, 0 deletions
diff --git a/gnu-efi/apps/modelist.c b/gnu-efi/apps/modelist.c
new file mode 100644
index 00000000..26892e1d
--- /dev/null
+++ b/gnu-efi/apps/modelist.c
@@ -0,0 +1,108 @@
+#include <efi.h>
+#include <efilib.h>
+
+extern EFI_GUID GraphicsOutputProtocol;
+
+static void
+print_modes(EFI_GRAPHICS_OUTPUT_PROTOCOL *gop)
+{
+	int i, imax;
+	EFI_STATUS rc;
+
+	if (gop->Mode) {
+		imax = gop->Mode->MaxMode;
+		Print(L"GOP reports MaxMode %d\n", imax);
+	} else {
+		Print(L"gop->Mode is NULL\n");
+		imax = 1;
+	}
+
+	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) {
+			Print(L"gop->QueryMode() returned %r\n", rc);
+			Print(L"Trying to start GOP with SetMode().\n");
+			rc = uefi_call_wrapper(gop->SetMode, 2, gop,
+				gop->Mode ? gop->Mode->Mode : 0);
+			rc = uefi_call_wrapper(gop->QueryMode, 4, gop, i,
+				&SizeOfInfo, &info);
+		}
+
+		if (EFI_ERROR(rc)) {
+			Print(L"%d: Bad response from QueryMode: %r (%d)\n",
+			      i, rc, rc);
+			continue;
+		}
+		Print(L"%c%d: %dx%d ",
+		      (gop->Mode &&
+		       CompareMem(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)) {
+		Print(L"Could not locate GOP: %r\n", rc);
+		return rc;
+	}
+
+	if (!gop) {
+		Print(L"LocateProtocol(GOP, &gop) returned %r but GOP is NULL\n", rc);
+		return EFI_UNSUPPORTED;
+	}
+
+	print_modes(gop);
+
+	SetWatchdog(0);
+	return EFI_SUCCESS;
+}