svn commit: r294719 - stable/10/sys/boot/efi/boot1

[Steven Hartland]

Author: smh
Date: Mon Jan 25 10:48:58 2016
New Revision: 294719
URL: https://svnweb.freebsd.org/changeset/base/294719

Log:
  MFC r281059 (by rpaulo):
  
  boot1 EFI: reset the screen and select the best mode.
  
  Sponsored by:	Multiplay

Modified:
  stable/10/sys/boot/efi/boot1/boot1.c
Directory Properties:
  stable/10/   (props changed)

Modified: stable/10/sys/boot/efi/boot1/boot1.c
==============================================================================
--- stable/10/sys/boot/efi/boot1/boot1.c	Mon Jan 25 10:45:18 2016	(r294718)
+++ stable/10/sys/boot/efi/boot1/boot1.c	Mon Jan 25 10:48:58 2016	(r294719)
@@ -108,11 +108,12 @@ EFI_STATUS efi_main(EFI_HANDLE Ximage, E
 {
 	EFI_HANDLE handles[128];
 	EFI_BLOCK_IO *blkio;
-	UINTN i, nparts = sizeof(handles);
+	UINTN i, nparts = sizeof(handles), cols, rows, max_dim, best_mode;
 	EFI_STATUS status;
 	EFI_DEVICE_PATH *devpath;
 	EFI_BOOT_SERVICES *BS;
 	EFI_CONSOLE_CONTROL_PROTOCOL *ConsoleControl = NULL;
+	SIMPLE_TEXT_OUTPUT_INTERFACE *conout = NULL;
 	char *path = _PATH_LOADER;
 
 	systab = Xsystab;
@@ -124,6 +125,26 @@ EFI_STATUS efi_main(EFI_HANDLE Ximage, E
 	if (status == EFI_SUCCESS)
 		(void)ConsoleControl->SetMode(ConsoleControl,
 		    EfiConsoleControlScreenText);
+	/*
+	 * Reset the console and find the best text mode.
+	 */
+	conout = systab->ConOut;
+	conout->Reset(conout, TRUE);
+	max_dim = best_mode = 0;
+	for (i = 0; ; i++) {
+		status = conout->QueryMode(conout, i,
+		    &cols, &rows);
+		if (EFI_ERROR(status))
+			break;
+		if (cols * rows > max_dim) {
+			max_dim = cols * rows;
+			best_mode = i;
+		}
+	}
+	if (max_dim > 0)
+		conout->SetMode(conout, best_mode);
+	conout->EnableCursor(conout, TRUE);
+	conout->ClearScreen(conout);
 
 	printf(" \n>> FreeBSD EFI boot block\n");
 	printf("   Loader path: %s\n", path);