예제 #1
0
int getBootOptions(bool firstRun)
{
	int     i;
	int     key;
	int     nextRow;
	int     timeout;
	int     bvCount;
	BVRef   bvr;
	BVRef   menuBVR;
	bool    showPrompt, newShowPrompt, isCDROM;

	// Initialize default menu selection entry.
	gBootVolume = menuBVR = selectBootVolume(bvChain);

	if (biosDevIsCDROM(gBIOSDev)) {
		isCDROM = true;
	} else {
		isCDROM = false;
	}

	// ensure we're in graphics mode if gui is setup
	if (gui.initialised && bootArgs->Video.v_display == VGA_TEXT_MODE)
	{
		setVideoMode(GRAPHICS_MODE, 0);
	}

	// Clear command line boot arguments
	clearBootArgs();

	// Allow user to override default timeout.
	if (multiboot_timeout_set) {
		timeout = multiboot_timeout;
	} else if (!getIntForKey(kTimeoutKey, &timeout, &bootInfo->bootConfig)) {
		/*  If there is no timeout key in the file use the default timeout
		    which is different for CDs vs. hard disks.  However, if not booting
		    a CD and no config file could be loaded set the timeout
		    to zero which causes the menu to display immediately.
		    This way, if no partitions can be found, that is the disk is unpartitioned
		    or simply cannot be read) then an empty menu is displayed.
		    If some partitions are found, for example a Windows partition, then
		    these will be displayed in the menu as foreign partitions.
		 */
		if (isCDROM) {
			timeout = kCDBootTimeout;
		} else {
			timeout = sysConfigValid ? kBootTimeout : 0;
		}
	}

	if (timeout < 0) {
		gBootMode |= kBootModeQuiet;
	}

	// If the user is holding down a modifier key, enter safe mode.
	if ((readKeyboardShiftFlags() & 0x0F) != 0) {
		gBootMode |= kBootModeSafe;
	}

	//	 18seven's Quick-args macro
		bool f8 = false, altf = false, shiftf = false, alts = false, 
		altv = false, altx = false; // x32 = false,  x64 = false;
		while (readKeyboardStatus())
		{
			key = bgetc ();
			if (key == 0x4200) f8 = true;
			if (key == 0x2100) altf = true;
			if (key == 0x0046) shiftf = true;
			if (key == 0x1F00) alts = true;
			if (key == 0x2F00) altv = true;
			if (key == 0x2D00) altx = true;
/*			if (key == 0x0004) x32 = true;
			if (key == 0x0007) x64 = true;
*/		}

	// If user typed F8, abort quiet mode, and display the menu.
	if (f8) {
		gBootMode &= ~kBootModeQuiet;
		timeout = 0;
	}

	// If user typed 'alt-v', boot in verbose mode.
	if ((gBootMode & kBootModeQuiet) && firstRun && altv) {
		addBootArg(kVerboseModeFlag);
	}

	// If user typed 'alt-s', boot in single user mode.
	if ((gBootMode & kBootModeQuiet) && firstRun && alts) {
		addBootArg(kSingleUserModeFlag);
	}

	if ((gBootMode & kBootModeQuiet) && firstRun && altf) {
		addBootArg(kIgnoreCachesFlag);
	}

	if ((gBootMode & kBootModeQuiet) && firstRun && shiftf) {
		addBootArg(kIgnoreBootFileFlag);
	}

	if ((gBootMode & kBootModeQuiet) && firstRun && altx) {
		addBootArg(kSafeModeFlag);
	}
/*
	if ((gBootMode & kBootModeQuiet) && firstRun && x32) {
		addBootArg(k32BitModeFlag);
	}

	if ((gBootMode & kBootModeQuiet) && firstRun && x64) {
		addBootArg(k64BitModeFlag);
	}
*/
	if (bootArgs->Video.v_display == VGA_TEXT_MODE) {
		setCursorPosition(0, 0, 0);
		clearScreenRows(0, kScreenLastRow);
		if (!(gBootMode & kBootModeQuiet)) {
			// Display banner and show hardware info.
			printf(bootBanner, (bootInfo->convmem + bootInfo->extmem) / 1024);
			printf(getVBEInfoString());
		}
		changeCursor(0, kMenuTopRow, kCursorTypeUnderline, 0);
		verbose("Scanning device %x...", gBIOSDev);
	}

	// When booting from CD, default to hard drive boot when possible.
	if (isCDROM && firstRun) {
		const char *val;
		char *prompt = NULL;
		char *name = NULL;
		int cnt;
		int optionKey;

		if (getValueForKey(kCDROMPromptKey, &val, &cnt, &bootInfo->bootConfig)) {
			prompt = malloc(cnt + 1);
			strncat(prompt, val, cnt);
		} else {
			name = malloc(80);
			getBootVolumeDescription(gBootVolume, name, 79, false);
			prompt = malloc(256);
			sprintf(prompt, "Press any key to start up from %s, or press F8 to enter startup options.", name);
			free(name);
		}

		if (getIntForKey( kCDROMOptionKey, &optionKey, &bootInfo->bootConfig )) {
			// The key specified is a special key.
		} else {
			// Default to F8.
			optionKey = 0x4200;
		}

		// If the timeout is zero then it must have been set above due to the
		// early catch of F8 which means the user wants to set boot options
		// which we ought to interpret as meaning he wants to boot the CD.
		if (timeout != 0) {
			key = countdown(prompt, kMenuTopRow, timeout);
		} else {
			key = optionKey;
		}

		if (prompt != NULL) {
			free(prompt);
		}

		clearScreenRows( kMenuTopRow, kMenuTopRow + 2 );

		// Hit the option key ?
		if (key == optionKey) {
			gBootMode &= ~kBootModeQuiet;
			timeout = 0;
		} else {
			key = key & 0xFF;

			// Try booting hard disk if user pressed 'h'
			if (biosDevIsCDROM(gBIOSDev) && key == 'h') {
				BVRef bvr;

				// Look at partitions hosting OS X other than the CD-ROM
				for (bvr = bvChain; bvr; bvr=bvr->next) {
					if ((bvr->flags & kBVFlagSystemVolume) && bvr->biosdev != gBIOSDev) {
						gBootVolume = bvr;
					}
				}
			}
			goto done;
		}
	}

	if (gBootMode & kBootModeQuiet) {
		// No input allowed from user.
		goto done;
	}

	if (firstRun && timeout > 0 && countdown("Press any key to enter startup options.", kMenuTopRow, timeout) == 0) {
		// If the user is holding down a modifier key,
		// enter safe mode.
		if ((readKeyboardShiftFlags() & 0x0F) != 0) {
			gBootMode |= kBootModeSafe;
		}
		goto done;
	}

	if (gDeviceCount) {
		// Allocate memory for an array of menu items.
		menuItems = malloc(sizeof(MenuItem) * gDeviceCount);
		if (menuItems == NULL) {
			goto done;
		}

		// Associate a menu item for each BVRef.
		for (bvr=bvChain, i=gDeviceCount-1, selectIndex=0; bvr; bvr=bvr->next) {
			if (bvr->visible) {
				getBootVolumeDescription(bvr, menuItems[i].name, sizeof(menuItems[i].name) - 1, true);
				menuItems[i].param = (void *) bvr;
				if (bvr == menuBVR) {
					selectIndex = i;
				}
				i--;
			}
		}
	}

	if (bootArgs->Video.v_display == GRAPHICS_MODE) {
		// redraw the background buffer
		gui.logo.draw = true;
		drawBackground();
		gui.devicelist.draw = true;
		gui.redraw = true;
		if (!(gBootMode & kBootModeQuiet)) {
			bool showBootBanner = true;
 
			// Check if "Boot Banner"=N switch is present in config file.
			getBoolForKey(kBootBannerKey, &showBootBanner, &bootInfo->bootConfig); 
			if (showBootBanner) {
				// Display banner and show hardware info.
				gprintf(&gui.screen, bootBanner + 1, (bootInfo->convmem + bootInfo->extmem) / 1024);
			}

			// redraw background
			memcpy(gui.backbuffer->pixels, gui.screen.pixmap->pixels, gui.backbuffer->width * gui.backbuffer->height * 4);
		}
	} else {
		// Clear screen and hide the blinking cursor.
		clearScreenRows(kMenuTopRow, kMenuTopRow + 2);
		changeCursor(0, kMenuTopRow, kCursorTypeHidden, 0);
	}

	nextRow = kMenuTopRow;
	showPrompt = true;

	if (gDeviceCount) {
		if( bootArgs->Video.v_display == VGA_TEXT_MODE ) {
			printf("Use \30\31 keys to select the startup volume.");
		}
		showMenu( menuItems, gDeviceCount, selectIndex, kMenuTopRow + 2, kMenuMaxItems );
		nextRow += min( gDeviceCount, kMenuMaxItems ) + 3;
	}

	// Show the boot prompt.
	showPrompt = (gDeviceCount == 0) || (menuBVR->flags & kBVFlagNativeBoot);
	showBootPrompt( nextRow, showPrompt );
	
	do {
		if (bootArgs->Video.v_display == GRAPHICS_MODE) {
			// redraw background
			memcpy( gui.backbuffer->pixels, gui.screen.pixmap->pixels, gui.backbuffer->width * gui.backbuffer->height * 4 );
			// reset cursor co-ords
			gui.debug.cursor = pos( gui.screen.width - 160 , 10 );
		}
		key = getc();
		updateMenu( key, (void **) &menuBVR );
		newShowPrompt = (gDeviceCount == 0) || (menuBVR->flags & kBVFlagNativeBoot);

		if (newShowPrompt != showPrompt) {
			showPrompt = newShowPrompt;
			showBootPrompt( nextRow, showPrompt );
		}

		if (showPrompt) {
			updateBootArgs(key);
		}

		switch (key) {
		case kReturnKey:
			if (gui.menu.draw) { 
				key=0;
				break;
			}
			if (*gBootArgs == '?') {
				char * argPtr = gBootArgs;

				// Skip the leading "?" character.
				argPtr++;
				getNextArg(&argPtr, booterCommand);
				getNextArg(&argPtr, booterParam);

				/*
				* TODO: this needs to be refactored.
				*/
				if (strcmp( booterCommand, "video" ) == 0) {
					if (bootArgs->Video.v_display == GRAPHICS_MODE) {
						showInfoBox(getVBEInfoString(), getVBEModeInfoString());
					} else {
						printVBEModeInfo();
					}
				} else if ( strcmp( booterCommand, "memory" ) == 0) {
					if (bootArgs->Video.v_display == GRAPHICS_MODE ) {
						showInfoBox("Memory Map", getMemoryInfoString());
					} else {
						printMemoryInfo();
					}
				} else if (strcmp(booterCommand, "lspci") == 0) {
					lspci();
				} else if (strcmp(booterCommand, "more") == 0) {
					showTextFile(booterParam);
				} else if (strcmp(booterCommand, "rd") == 0) {
					processRAMDiskCommand(&argPtr, booterParam);
				} else if (strcmp(booterCommand, "norescan") == 0) {
					if (gEnableCDROMRescan) {
						gEnableCDROMRescan = false;
						break;
					}
				} else {
					showHelp();
				}
				key = 0;
				showBootPrompt(nextRow, showPrompt);
				break;
			}
			gBootVolume = menuBVR;
			setRootVolume(menuBVR);
			gBIOSDev = menuBVR->biosdev;
			break;

		case kEscapeKey:
			clearBootArgs();
			break;
		
		case kF2Key:
			
			/*
			 * AutoResolution - Reapply the patch if Graphics Mode was incorrect or EDID Info was insane
			 */
			
			if ((gAutoResolution == TRUE) && map)
			{
				// get the new Graphics Mode key
				processBootOptions();
				
				UInt32 params[4];
				params[3] = 0;
				//Has the target Resolution Changed ?
				int count = getNumberArrayFromProperty(kGraphicsModeKey, params, 4);
				if ( count < 3 )
					getResolution(params);
				
				if ((params[0] != 0) && (params[1] != 0)
				&& (params[0] != map->currentX) && (params[1] != map->currentY))
				{
				
					//Go back to TEXT mode while we change  the mode
					if (bootArgs->Video.v_display == GRAPHICS_MODE)
					{
						CursorState cursorState;
						
						setVideoMode(VGA_TEXT_MODE, 0);
						
						setCursorPosition(0, 0, 0);
						clearScreenRows(0, kScreenLastRow);
						changeCursor( 0, 0, kCursorTypeHidden, &cursorState );
						
						//Reapply patch in case resolution have changed
						
						patchVbios(map, params[0], params[1], params[2], 0, 0);
						
						if (useGUI && (gui.initialised == true))
							initGUI();
						// Make sure all values are set
						if (bootArgs->Video.v_display != GRAPHICS_MODE)
							bootArgs->Video.v_display = GRAPHICS_MODE;
						
						if (!useGUI)
							useGUI = true;
						
						// redraw the background buffer
						drawBackground();
						gui.devicelist.draw = true;
						gui.redraw = true;
						if (!(gBootMode & kBootModeQuiet))
						{
							bool showBootBanner = true;
							
							// Check config file.
							getBoolForKey(kBootBannerKey, &showBootBanner, &bootInfo->bootConfig); 
							if (showBootBanner)
								// Display banner and show hardware info.
								gprintf(&gui.screen, bootBanner + 1, (bootInfo->convmem + bootInfo->extmem) / 1024);
								
							// redraw background
							memcpy(gui.backbuffer->pixels, gui.screen.pixmap->pixels, gui.backbuffer->width * gui.backbuffer->height * 4);
						}
						
						nextRow = kMenuTopRow;
						showPrompt = true;
						
						if (gDeviceCount)
						{
							showMenu( menuItems, gDeviceCount, selectIndex, kMenuTopRow + 2, kMenuMaxItems );
							nextRow += min( gDeviceCount, kMenuMaxItems ) + 3;
						}
						
						// Show the boot prompt.
						showPrompt = (gDeviceCount == 0) || (menuBVR->flags & kBVFlagNativeBoot);
						showBootPrompt( nextRow, showPrompt );
						
						//this is used to avoid resetting the incorrect mode while quiting the boot menu
						map->hasSwitched = true;
					}
				}
				clearBootArgs();
				key = 0;
			}
			break;

		case kF5Key:
			// New behavior:
			// Clear gBootVolume to restart the loop
			// if the user enabled rescanning the optical drive.
			// Otherwise boot the default boot volume.
			if (gEnableCDROMRescan) {
				gBootVolume = NULL;
				clearBootArgs();
			}
			break;

		case kF10Key:
			gScanSingleDrive = false;
			scanDisks(gBIOSDev, &bvCount);
			gBootVolume = NULL;
			clearBootArgs();
			break;

		case kTabKey:
			// New behavior:
			// Switch between text & graphic interfaces
			// Only Permitted if started in graphics interface
			if (useGUI)
			{
				setVideoMode(VGA_TEXT_MODE, 0);

				setCursorPosition(0, 0, 0);
				clearScreenRows(0, kScreenLastRow);

				// Display banner and show hardware info.
				printf(bootBanner, (bootInfo->convmem + bootInfo->extmem) / 1024);
				printf(getVBEInfoString());

				clearScreenRows(kMenuTopRow, kMenuTopRow + 2);
				changeCursor(0, kMenuTopRow, kCursorTypeHidden, 0);

				nextRow = kMenuTopRow;
				showPrompt = true;

				if (gDeviceCount)
				{
					printf("Use \30\31 keys to select the startup volume.");
					showMenu(menuItems, gDeviceCount, selectIndex, kMenuTopRow + 2, kMenuMaxItems);
					nextRow += min(gDeviceCount, kMenuMaxItems) + 3;
				}

				showPrompt = (gDeviceCount == 0) || (menuBVR->flags & kBVFlagNativeBoot);
				showBootPrompt(nextRow, showPrompt);
				//changeCursor( 0, kMenuTopRow, kCursorTypeUnderline, 0 );
				
				/*
				 * AutoResolution - make sure all values are set
				 */
				
				bootArgs->Video.v_display = VGA_TEXT_MODE;
				useGUI = false;
			}
			else
			{
				gui.redraw = true;
				setVideoMode(GRAPHICS_MODE, 0);
				
				/*
				 * AutoResolution - make sure all values are set
				 */
				bootArgs->Video.v_display = GRAPHICS_MODE;
				useGUI = true;
				
				updateVRAM();
			}
			key = 0;
			break;

		default:
			key = 0;
			break;
		}
	} while (0 == key);

done:
	if (bootArgs->Video.v_display == VGA_TEXT_MODE) {
		clearScreenRows(kMenuTopRow, kScreenLastRow);
		changeCursor(0, kMenuTopRow, kCursorTypeUnderline, 0);
	}
	shouldboot = false;
	gui.menu.draw = false;
	if (menuItems) {
		free(menuItems);
		menuItems = NULL;
	}
	return 0;
}
예제 #2
0
int getBootOptions(bool firstRun)
{
	int     i;
	int     key;
	int     nextRow;
	int     timeout;
	int     bvCount;
	BVRef   bvr;
	BVRef   menuBVR;
	bool    showPrompt, newShowPrompt, isCDROM;

	// Initialize default menu selection entry.
	gBootVolume = menuBVR = selectBootVolume(bvChain);

	if (biosDevIsCDROM(gBIOSDev)) {
		isCDROM = true;
	} else {
		isCDROM = false;
	}

	// ensure we're in graphics mode if gui is setup
	if (firstRun && gui.initialised && bootArgs->Video.v_display == VGA_TEXT_MODE)
	{
		setVideoMode(GRAPHICS_MODE, 0);
	}

	// Clear command line boot arguments
	clearBootArgs();

	// Allow user to override default timeout.
	if (multiboot_timeout_set) {
		timeout = multiboot_timeout;
	} else if (!getIntForKey(kTimeoutKey, &timeout, &bootInfo->chameleonConfig)) {
		/*  If there is no timeout key in the file use the default timeout
		    which is different for CDs vs. hard disks.  However, if not booting
		    a CD and no config file could be loaded set the timeout
		    to zero which causes the menu to display immediately.
		    This way, if no partitions can be found, that is the disk is unpartitioned
		    or simply cannot be read) then an empty menu is displayed.
		    If some partitions are found, for example a Windows partition, then
		    these will be displayed in the menu as foreign partitions.
		 */
		if (isCDROM) {
			timeout = kCDBootTimeout;
		} else {
			timeout = sysConfigValid ? kBootTimeout : 0;
		}
	}

	if (timeout < 0) {
		gBootMode |= kBootModeQuiet;
	}

	// If the user is holding down a modifier key, enter safe mode.
	if ((readKeyboardShiftFlags() & 0x0F) != 0) {
		gBootMode |= kBootModeSafe;
	}

	// Checking user pressed keys
	bool f8press = false, spress = false, vpress = false;
	while (readKeyboardStatus()) {
		key = bgetc ();
		if (key == 0x4200) f8press = true;
		if ((key & 0xff) == 's' || (key & 0xff) == 'S') spress = true;
		if ((key & 0xff) == 'v' || (key & 0xff) == 'V') vpress = true;
	}
	// If user typed F8, abort quiet mode, and display the menu.
	if (f8press) {
		gBootMode &= ~kBootModeQuiet;
		timeout = 0;
	}
	// If user typed 'v' or 'V', boot in verbose mode.
	if ((gBootMode & kBootModeQuiet) && firstRun && vpress) {
		addBootArg(kVerboseModeFlag);
	}
	// If user typed 's' or 'S', boot in single user mode.
	if ((gBootMode & kBootModeQuiet) && firstRun && spress) {
		addBootArg(kSingleUserModeFlag);
	}

	if (bootArgs->Video.v_display == VGA_TEXT_MODE) {
		setCursorPosition(0, 0, 0);
		clearScreenRows(0, kScreenLastRow);
		if (!(gBootMode & kBootModeQuiet)) {
			// Display banner and show hardware info.
			printf(bootBanner, (bootInfo->convmem + bootInfo->extmem) / 1024);
			printf(getVBEInfoString());
		}
		changeCursor(0, kMenuTopRow, kCursorTypeUnderline, 0);
		verbose("Scanning device %x...", gBIOSDev);
	}

	// When booting from CD, default to hard drive boot when possible. 
	if (isCDROM && firstRun) {
		const char *val;
		char *prompt = NULL;
		char *name = NULL;
		int cnt;
		int optionKey;

		if (getValueForKey(kCDROMPromptKey, &val, &cnt, &bootInfo->chameleonConfig)) {
			prompt = malloc(cnt + 1);
			strncat(prompt, val, cnt);
		} else {
			name = malloc(80);
			getBootVolumeDescription(gBootVolume, name, 79, false);
			prompt = malloc(256);
			sprintf(prompt, "Press any key to start up from %s, or press F8 to enter startup options.", name);
			free(name);
		}

		if (getIntForKey( kCDROMOptionKey, &optionKey, &bootInfo->chameleonConfig )) {
			// The key specified is a special key.
		} else {
			// Default to F8.
			optionKey = 0x4200;
		}

		// If the timeout is zero then it must have been set above due to the
		// early catch of F8 which means the user wants to set boot options
		// which we ought to interpret as meaning he wants to boot the CD.
		if (timeout != 0) {
			key = countdown(prompt, kMenuTopRow, timeout);
		} else {
			key = optionKey;
		}

		if (prompt != NULL) {
			free(prompt);
		}

		clearScreenRows( kMenuTopRow, kMenuTopRow + 2 );

		// Hit the option key ?
		if (key == optionKey) {
			gBootMode &= ~kBootModeQuiet;
			timeout = 0;
		} else {
			key = key & 0xFF;

			// Try booting hard disk if user pressed 'h'
			if (biosDevIsCDROM(gBIOSDev) && key == 'h') {
				BVRef bvr;

				// Look at partitions hosting OS X other than the CD-ROM
				for (bvr = bvChain; bvr; bvr=bvr->next) {
					if ((bvr->flags & kBVFlagSystemVolume) && bvr->biosdev != gBIOSDev) {
						gBootVolume = bvr;
					}
				}
			}
			goto done;
		}
	}

	if (gBootMode & kBootModeQuiet) {
		// No input allowed from user.
		goto done;
	}

	if (firstRun && timeout > 0 && countdown("Press any key to enter startup options.", kMenuTopRow, timeout) == 0) {
		// If the user is holding down a modifier key,
		// enter safe mode.
		if ((readKeyboardShiftFlags() & 0x0F) != 0) {
			gBootMode |= kBootModeSafe;
		}
		goto done;
	}

	if (gDeviceCount > 0) {
		// Allocate memory for an array of menu items.
		menuItems = malloc(sizeof(MenuItem) * gDeviceCount);
		if (menuItems == NULL) {
			goto done;
		}

		// Associate a menu item for each BVRef.
		for (bvr=bvChain, i=gDeviceCount-1, selectIndex=-1; bvr; bvr=bvr->next) {
			if (bvr->visible) {
				getBootVolumeDescription(bvr, menuItems[i].name, sizeof(menuItems[i].name) - 1, true);
				menuItems[i].param = (void *) bvr;
				if (bvr == menuBVR) {
					selectIndex = i;
				}
				i--;
			}
		}
		// Jief : In case the default partition (returned by selectBootVolume) is not in the menu
		if ( selectIndex == -1 )
		{
			selectIndex = 0;

			// gDeviceCount is actually > 0, so menuItems[selectIndex] exists
			menuBVR = (BVRef)(menuItems[selectIndex].param);
			// what happen is bvChain is empty ?
		}
	}

	if (bootArgs->Video.v_display != VGA_TEXT_MODE) {
		// redraw the background buffer
		gui.logo.draw = true;
		drawBackground();
		gui.devicelist.draw = true;
		gui.redraw = true;
		if (!(gBootMode & kBootModeQuiet)) {
 
			// Check if "Boot Banner"=N switch is present in config file.
			getBoolForKey(kBootBannerKey, &showBootBanner, &bootInfo->chameleonConfig); 
			if (showBootBanner) {
				// Display banner and show hardware info.
				gprintf(&gui.screen, bootBanner + 1, (bootInfo->convmem + bootInfo->extmem) / 1024);
			}

			// redraw background
			memcpy(gui.backbuffer->pixels, gui.screen.pixmap->pixels, gui.backbuffer->width * gui.backbuffer->height * 4);
		}
	} else {
		// Clear screen and hide the blinking cursor.
		clearScreenRows(kMenuTopRow, kMenuTopRow + 2);
		changeCursor(0, kMenuTopRow, kCursorTypeHidden, 0);
	}

	nextRow = kMenuTopRow;
	showPrompt = true;

	if (gDeviceCount) {
		if( bootArgs->Video.v_display == VGA_TEXT_MODE ) {
			printf("Use \30\31 keys to select the startup volume.");
		}
		showMenu( menuItems, gDeviceCount, selectIndex, kMenuTopRow + 2, kMenuMaxItems );
		nextRow += MIN( gDeviceCount, kMenuMaxItems ) + 3;
	}

	// Show the boot prompt.
	showPrompt = (gDeviceCount == 0) || (menuBVR->flags & kBVFlagNativeBoot);
	showBootPrompt( nextRow, showPrompt );
	
	do {
		if (bootArgs->Video.v_display != VGA_TEXT_MODE) {
			// redraw background
			memcpy( gui.backbuffer->pixels, gui.screen.pixmap->pixels, gui.backbuffer->width * gui.backbuffer->height * 4 );
			// reset cursor co-ords
			gui.debug.cursor = pos( gui.screen.width - 160 , 10 );
		}
		key = getchar();
		updateMenu( key, (void **) &menuBVR );
		newShowPrompt = (gDeviceCount == 0) || (menuBVR->flags & kBVFlagNativeBoot);

		if (newShowPrompt != showPrompt) {
			showPrompt = newShowPrompt;
			showBootPrompt( nextRow, showPrompt );
		}

		if (showPrompt) {
			updateBootArgs(key);
		}

		switch (key) {
		case KEY_ENTER:
			if (gui.menu.draw) { 
				key=0;
				break;
			}
			if (*gBootArgs == '?') {
				char * argPtr = gBootArgs;

				// Skip the leading "?" character.
				argPtr++;
				getNextArg(&argPtr, booterCommand);
				getNextArg(&argPtr, booterParam);

				/*
				* TODO: this needs to be refactored.
				*/
				if (strcmp( booterCommand, "video" ) == 0) {
					if (bootArgs->Video.v_display != VGA_TEXT_MODE) {
						showInfoBox(getVBEInfoString(), getVBEModeInfoString());
					} else {
						printVBEModeInfo();
					}
				} else if ( strcmp( booterCommand, "memory" ) == 0) {
					if (bootArgs->Video.v_display != VGA_TEXT_MODE ) {
						showInfoBox("Memory Map", getMemoryInfoString());
					} else {
						printMemoryInfo();
					}
				} else if (strcmp(booterCommand, "lspci") == 0) {
					lspci();
				} else if (strcmp(booterCommand, "log") == 0) {
			                showTextBuffer(msgbuf, strlen(msgbuf));
				} else if (strcmp(booterCommand, "more") == 0) {
					showTextFile(booterParam);
				} else if (strcmp(booterCommand, "rd") == 0) {
					processRAMDiskCommand(&argPtr, booterParam);
				} else if (strcmp(booterCommand, "norescan") == 0) {
					if (gEnableCDROMRescan) {
						gEnableCDROMRescan = false;
						break;
					}
				} else {
					showHelp();
				}
				key = 0;
				showBootPrompt(nextRow, showPrompt);
				break;
			}
			gBootVolume = menuBVR;
			setRootVolume(menuBVR);
			gBIOSDev = menuBVR->biosdev;
			break;

		case KEY_ESC:
			clearBootArgs();
			break;

		case KEY_F5:
			// New behavior:
			// Clear gBootVolume to restart the loop
			// if the user enabled rescanning the optical drive.
			// Otherwise boot the default boot volume.
			if (gEnableCDROMRescan) {
				gBootVolume = NULL;
				clearBootArgs();
			}
			break;

		case KEY_F10:
			gScanSingleDrive = false;
			scanDisks(gBIOSDev, &bvCount);
			gBootVolume = NULL;
			clearBootArgs();
			break;

		case KEY_TAB:
			// New behavior:
			// Switch between text & graphic interfaces
			// Only Permitted if started in graphics interface
			if (useGUI) {
				if (bootArgs->Video.v_display != VGA_TEXT_MODE) {
					setVideoMode(VGA_TEXT_MODE, 0);

					setCursorPosition(0, 0, 0);
					clearScreenRows(0, kScreenLastRow);

					// Display banner and show hardware info.
					printf(bootBanner, (bootInfo->convmem + bootInfo->extmem) / 1024);
					printf(getVBEInfoString());

					clearScreenRows(kMenuTopRow, kMenuTopRow + 2);
					changeCursor(0, kMenuTopRow, kCursorTypeHidden, 0);

					nextRow = kMenuTopRow;
					showPrompt = true;

					if (gDeviceCount) {
						printf("Use \30\31 keys to select the startup volume.");
						showMenu(menuItems, gDeviceCount, selectIndex, kMenuTopRow + 2, kMenuMaxItems);
						nextRow += MIN(gDeviceCount, kMenuMaxItems) + 3;
					}

					showPrompt = (gDeviceCount == 0) || (menuBVR->flags & kBVFlagNativeBoot);
					showBootPrompt(nextRow, showPrompt);
					//changeCursor( 0, kMenuTopRow, kCursorTypeUnderline, 0 );
				} else {
					gui.redraw = true;
					setVideoMode(GRAPHICS_MODE, 0);
					updateVRAM();
                    			updateGraphicBootPrompt();
				}
			}
			key = 0;
			break;

		default:
			key = 0;
			break;
		}
	} while (0 == key);

done:
	if (bootArgs->Video.v_display == VGA_TEXT_MODE) {
		clearScreenRows(kMenuTopRow, kScreenLastRow);
		changeCursor(0, kMenuTopRow, kCursorTypeUnderline, 0);
	}
	shouldboot = false;
	gui.menu.draw = false;
	if (menuItems) {
		free(menuItems);
		menuItems = NULL;
	}
	execute_hook("BootOptions", gBootArgs, gBootArgsPtr, NULL, NULL);
	return 0;
}
예제 #3
0
파일: options.c 프로젝트: carriercomm/osx-2
int
getBootOptions(BOOL firstRun)
{
    int     i;
    int     key;
    int     selectIndex = 0;
    int     bvCount;
    int     nextRow;
    int     timeout;
    BVRef   bvr;
    BVRef   bvChain;
    BVRef   menuBVR;
    BOOL    showPrompt, newShowPrompt, isCDROM;
    MenuItem *  menuItems = NULL;

    if ( diskIsCDROM(gBootVolume) )
        isCDROM = TRUE;
    else
        isCDROM = FALSE;

    // Allow user to override default timeout.

    if ( getIntForKey(kTimeoutKey, &timeout) == NO )
    {
        if ( isCDROM )
            timeout = kCDBootTimeout;
        else
            timeout = kBootTimeout;
    }
    if (timeout < 0) gBootMode |= kBootModeQuiet;

    // If the user is holding down a modifier key,
    // enter safe mode.
    if ( ( readKeyboardShiftFlags() & 0x0F ) != 0 ) {
        gBootMode |= kBootModeSafe;
    }

    // If user typed F8, abort quiet mode,
    // and display the menu.
    if (flushKeyboardBuffer()) {
        gBootMode &= ~kBootModeQuiet;
        timeout = 0;
    }

    clearBootArgs();

    setCursorPosition( 0, 0, 0 );
    clearScreenRows( 0, kScreenLastRow );
    if ( ! ( gBootMode & kBootModeQuiet ) ) {
        // Display banner and show hardware info. 
        printf( bootBanner, (bootInfo->convmem + bootInfo->extmem) / 1024 );
        printVBEInfo();
    }

    changeCursor( 0, kMenuTopRow, kCursorTypeUnderline, 0 );

    verbose("Scanning device %x...", gBIOSDev);

    // Get a list of bootable volumes on the device.

    bvChain = scanBootVolumes( gBIOSDev, &bvCount );
    gBootVolume = menuBVR = selectBootVolume( bvChain );

    // When booting from CD, default to hard
    // drive boot when possible. 

    if ( isCDROM )
    {
        const char *val;
        char *prompt;
        int cnt;
        int optionKey;

        if (getValueForKey( kCDROMPromptKey, &val, &cnt )) {
            cnt += 1;
            prompt = malloc(cnt);
            strlcpy(prompt, val, cnt);
        } else {
            prompt = "Press any key to start up from CD-ROM, "
                "or press F8 to enter startup options.";
            cnt = 0;
        }

        if (getIntForKey( kCDROMOptionKey, &optionKey )) {
            // The key specified is a special key.
        } else if (getValueForKey( kCDROMOptionKey, &val, &cnt) && cnt >= 1) {
            optionKey = val[0];
        } else {
            // Default to F8.
            optionKey = 0x4200;
        }

        key = countdown(prompt, kMenuTopRow, timeout);
        if (cnt)
            free(prompt);

        clearScreenRows( kMenuTopRow, kMenuTopRow + 2 );

        if (key == 0) {
            // Boot from hard disk.
            // Scan the original device 0x80.

            BVRef hd_bvr = selectBootVolume(scanBootVolumes(0x80, 0));
            if ( hd_bvr->flags & kBVFlagNativeBoot ) {
                gBootVolume = hd_bvr;
                gBIOSDev = hd_bvr->biosdev;
                initKernBootStruct( gBIOSDev );
                goto done;
            }
        } else  {
            if (optionKey < 0x100)
                key = key & 0x5F;
            if (key != optionKey)
                goto done;
        }
        gBootMode &= ~kBootModeQuiet;
        timeout = 0;
    }

    if ( gBootMode & kBootModeQuiet )
    {
        // No input allowed from user.
        goto done;
    }

    if ( firstRun && ( timeout > 0 ) &&
         ( countdown("Press any key to enter startup options.",
                     kMenuTopRow, timeout) == 0 ) )
    {
        // If the user is holding down a modifier key,
        // enter safe mode.
        if ( ( readKeyboardShiftFlags() & 0x0F ) != 0 ) {
            gBootMode |= kBootModeSafe;
        }
        goto done;
    }

    if ( bvCount )
    {
        // Allocate memory for an array of menu items.

        menuItems = (MenuItem *) malloc( sizeof(MenuItem) * bvCount );
        if ( menuItems == NULL ) goto done;

        // Associate a menu item for each BVRef.

        for ( bvr = bvChain, i = bvCount - 1, selectIndex = 0;
              bvr; bvr = bvr->next, i-- )
        {
            getBootVolumeDescription( bvr, menuItems[i].name, 80, YES );
            menuItems[i].param = (void *) bvr;
            if ( bvr == menuBVR ) selectIndex = i;
        }
    }

    // Clear screen and hide the blinking cursor.

    clearScreenRows( kMenuTopRow, kMenuTopRow + 2 );
    changeCursor( 0, kMenuTopRow, kCursorTypeHidden, 0 );
    nextRow = kMenuTopRow;
    showPrompt = YES;

    // Show the menu.

    if ( bvCount )
    {
        printf("Use \30\31 keys to select the startup volume.");
        showMenu( menuItems, bvCount, selectIndex, kMenuTopRow + 2, kMenuMaxItems );
        nextRow += min( bvCount, kMenuMaxItems ) + 3;
    }

    // Show the boot prompt.

    showPrompt = (bvCount == 0) || (menuBVR->flags & kBVFlagNativeBoot);
    showBootPrompt( nextRow, showPrompt );

    do {
        key = getc();

        updateMenu( key, (void **) &menuBVR );

        newShowPrompt = (bvCount == 0) ||
                        (menuBVR->flags & kBVFlagNativeBoot);

        if ( newShowPrompt != showPrompt )
        {
            showPrompt = newShowPrompt;
            showBootPrompt( nextRow, showPrompt );
        }
        if ( showPrompt ) updateBootArgs( key );

        switch ( key & kASCIIKeyMask )
        {
            case kReturnKey:
                if ( *gBootArgs == '?' )
                {
                    if ( strcmp( gBootArgs, "?video" ) == 0 ) {
                        printVBEModeInfo();
                    } else if ( strcmp( gBootArgs, "?memory" ) == 0 ) {
                        printMemoryInfo();
                    } else {
                        showHelp();
                    }
                    key = 0;
                    showBootPrompt( nextRow, showPrompt );
                    break;
                }
                gBootVolume = menuBVR;
                break;

            case kEscapeKey:
                clearBootArgs();
                break;

            default:
                key = 0;
        }
    }
    while ( 0 == key );

done:
    firstRun = NO;

    clearScreenRows( kMenuTopRow, kScreenLastRow );
    changeCursor( 0, kMenuTopRow, kCursorTypeUnderline, 0 );

    if ( menuItems ) free(menuItems);

    return 0;
}
예제 #4
0
int getBootOptions(bool firstRun)
{
	int     i;
	int     key;
	int     nextRow;
	int     timeout;
#if UNUSED
	int     bvCount;
#endif
	BVRef   bvr;
	BVRef   menuBVR;
	bool    showPrompt, newShowPrompt, isCDROM;
    int     optionKey;
	
	// Initialize default menu selection entry.
	menuBVR = selectBootVolume(getBvChain());
	safe_set_env(envgBootVolume, (uint32_t)menuBVR);
	
	if (biosDevIsCDROM((int)get_env(envgBIOSDev))) {
		isCDROM = true;
	} else {
		isCDROM = false;
	}
	
	// Clear command line boot arguments
	clearBootArgs();
	
	// Allow user to override default timeout.
#if UNUSED
	if (multiboot_timeout_set) {
		timeout = multiboot_timeout;
	} else 
#endif
		if (!getIntForKey(kTimeoutKey, &timeout, DEFAULT_BOOT_CONFIG)) {
			/*  If there is no timeout key in the file use the default timeout
			 which is different for CDs vs. hard disks.  However, if not booting
			 a CD and no config file could be loaded set the timeout
			 to zero which causes the menu to display immediately.
			 This way, if no partitions can be found, that is the disk is unpartitioned
			 or simply cannot be read) then an empty menu is displayed.
			 If some partitions are found, for example a Windows partition, then
			 these will be displayed in the menu as foreign partitions.
			 */
			if (isCDROM) {
				timeout = kCDBootTimeout;
			} else {
				timeout = get_env(envSysConfigValid) ? kBootTimeout : 0;
			}
		}
	
    long gBootMode = (long)get_env(envgBootMode);
    
	if (timeout < 0) {
		gBootMode |= kBootModeQuiet;
        safe_set_env(envgBootMode,gBootMode);
		
	}
	
	// If the user is holding down a modifier key, enter safe mode.
	if ((readKeyboardShiftFlags() & 0x0F) != 0) {
		
		gBootMode |= kBootModeSafe;
        safe_set_env(envgBootMode,gBootMode);
		
	}
	
	// Checking user pressed keys
	bool f8press = false, spress = false, vpress = false;
	while (readKeyboardStatus()) {
		key = bgetc ();
		if (key == 0x4200) f8press = true;
		if ((key & 0xff) == 's' || (key & 0xff) == 'S') spress = true;
		if ((key & 0xff) == 'v' || (key & 0xff) == 'V') vpress = true;
	}
	// If user typed F8, abort quiet mode, and display the menu.
	if (f8press) {
		gBootMode &= ~kBootModeQuiet;
        safe_set_env(envgBootMode,gBootMode);
		
		timeout = 0;
	}
	// If user typed 'v' or 'V', boot in verbose mode.
	if ((gBootMode & kBootModeQuiet) && firstRun && vpress) {
		addBootArg(kVerboseModeFlag);
	}
	// If user typed 's' or 'S', boot in single user mode.
	if ((gBootMode & kBootModeQuiet) && firstRun && spress) {
		addBootArg(kSingleUserModeFlag);
	}
	
	setCursorPosition(0, 0, 0);
	clearScreenRows(0, kScreenLastRow);
	if (!(gBootMode & kBootModeQuiet)) {
		// Display banner and show hardware info.
        char * bootBanner = (char*)(uint32_t)get_env(envBootBanner);
        
		printf(bootBanner, (int)(get_env(envConvMem) + get_env(envExtMem)) / 1024);       
	}
	changeCursor(0, kMenuTopRow, kCursorTypeUnderline, 0);
	msglog("Scanning device %x...", (uint32_t)get_env(envgBIOSDev));
	
	// When booting from CD, default to hard drive boot when possible. 
	if (isCDROM && firstRun) {
		const char *val;
		char *prompt = NULL;
		char *name = NULL;
		int cnt;
		
		if (getValueForKey(kCDROMPromptKey, &val, &cnt, DEFAULT_BOOT_CONFIG)) {
			prompt = calloc(cnt + 1, sizeof(char));
            if (!prompt) {
                stop("Couldn't allocate memory for the prompt\n"); //TODO: Find a better stategie
                return -1;
            }
			strncat(prompt, val, cnt);
		} else {			
            prompt = calloc(256, sizeof(char));
            if (!prompt) {
                stop("Couldn't allocate memory for the prompt\n"); //TODO: Find a better stategie
                return -1;
            }
            BVRef bvr;
            if (( bvr = ((BVRef)(uint32_t)get_env(envgBootVolume)))) {
                name = calloc(80, sizeof(char));
                if (!name) {
                    stop("Couldn't allocate memory for the device name\n"); //TODO: Find a better stategie
                    return -1;
                }
                getBootVolumeDescription(bvr, name, 79, false);
                
                snprintf(prompt, 256,"Press ENTER to start up from %s, or press any key to enter startup options.", name);
                free(name);
            } else snprintf(prompt, 256,"Press ENTER to start up, or press any key to enter startup options.");
			
		}
		
		if (getIntForKey( kCDROMOptionKey, &optionKey, DEFAULT_BOOT_CONFIG )) {
			// The key specified is a special key.
		} else {
			// Default to F8.
			optionKey = 0x4200;
		}
		
		// If the timeout is zero then it must have been set above due to the
		// early catch of F8 which means the user wants to set boot options
		// which we ought to interpret as meaning he wants to boot the CD.
		if (timeout != 0) {
			key = countdown(prompt, kMenuTopRow, timeout, &optionKey);
		} else {
			key = optionKey;
		}
		
		if (prompt != NULL) {
			free(prompt);
		}
		
		clearScreenRows( kMenuTopRow, kMenuTopRow + 2 );
		
        do {
            // Hit the option key ?
            if (key == optionKey) {
				
                if (key != 0x1C0D) {
                    gBootMode &= ~kBootModeQuiet;
                    safe_set_env(envgBootMode,gBootMode);
                    timeout = 0;
                    break;
                }
                
            } 
            
            key = key & 0xFF;
            
            // Try booting hard disk if user pressed 'h'
            if (biosDevIsCDROM((int)get_env(envgBIOSDev)) && key == 'h') {
                BVRef bvr;
                
                // Look at partitions hosting OS X other than the CD-ROM
                for (bvr = getBvChain(); bvr; bvr=bvr->next) {
                    if ((bvr->flags & kBVFlagSystemVolume) && bvr->biosdev != (int)get_env(envgBIOSDev)) {
						safe_set_env(envgBootVolume, (uint32_t)bvr);
                    }
                }
            }
            goto done;
            
        } while (0);
		
	}
	
	if (get_env(envgBootMode) & kBootModeQuiet) {
		// No input allowed from user.
		goto done;
	}
	
	if (firstRun && timeout > 0 ) {
        
        key = countdown("Press ENTER to start up, or press any key to enter startup options.", kMenuTopRow, timeout, &optionKey);
        
        if (key == 0x1C0D) {
            goto done;
			
        } 
        else if (key == 0)
        {
            // If the user is holding down a modifier key,
            // enter safe mode.     
            
            if ((readKeyboardShiftFlags() & 0x0F) != 0) {
                gBootMode |= kBootModeSafe;
                safe_set_env(envgBootMode,gBootMode);
            }
            goto done;
        }
	}
	int devcnt = (int)get_env(envgDeviceCount);
    
	if (devcnt) {
		// Allocate memory for an array of menu items.
		menuItems = calloc(devcnt,sizeof(MenuItem));
		if (menuItems == NULL) {
			goto done;
		}
		
		// Associate a menu item for each BVRef.
		for (bvr=getBvChain(), i=devcnt-1, selectIndex=0; bvr; bvr=bvr->next) {
			if (bvr->visible) {
				getBootVolumeDescription(bvr, menuItems[i].name, sizeof(menuItems[i].name) - 1, true);
				menuItems[i].param = (void *) bvr;
				if (bvr == menuBVR) {
					selectIndex = i;
				}
				i--;
			}
		}
	}
	
	// Clear screen and hide the blinking cursor.
	clearScreenRows(kMenuTopRow, kMenuTopRow + 2);
	changeCursor(0, kMenuTopRow, kCursorTypeHidden, 0);
	
	nextRow = kMenuTopRow;
	/*showPrompt = true;*/
	
	if (devcnt) {
		printf("Use \30\31 keys to select the startup volume.");
		showMenu( menuItems, devcnt, selectIndex, kMenuTopRow + 2, kMenuMaxItems );
		nextRow += min( devcnt, kMenuMaxItems ) + 3;
	}
	
	// Show the boot prompt.
	showPrompt = (devcnt == 0) || (menuBVR->flags & kBVFlagNativeBoot);
	showBootPrompt( nextRow, showPrompt );
	
	do {        
        
		key = getc();
		updateMenu( key, (void **) &menuBVR );
		newShowPrompt = (devcnt == 0) || (menuBVR->flags & kBVFlagNativeBoot);
		
		if (newShowPrompt != showPrompt)
		{
			showPrompt = newShowPrompt;
			showBootPrompt( nextRow, showPrompt );
		}
		
		if (showPrompt)
		{            
			updateBootArgs(key);
		}		
        
		switch (key) {
			case kReturnKey:
				if (*gBootArgs == '?') {
					char * argPtr = gBootArgs;
					
					// Skip the leading "?" character.
					argPtr++;
					getNextArg(&argPtr, booterCommand);
					getNextArg(&argPtr, booterParam);
					
					/*
					 * TODO: this needs to be refactored.
					 */
#if UNUSED
					if (strncmp( booterCommand, "video", sizeof("video") ) == 0)
					{
						printVBEModeInfo();
					}
					else
#endif
						if ( strncmp( booterCommand, "memory", sizeof("memory") ) == 0) 
						{
							printMemoryInfo();
						}
						else if (strncmp(booterCommand, "lspci", sizeof( "lspci")) == 0) 
						{
							lspci();
						} 
						else if (strncmp(booterCommand, "more",  sizeof("more")) == 0) 
						{
							showTextFile(booterParam);
						}
						else if (strncmp(booterCommand, "rd", sizeof("rd")) == 0) 
						{
							if (execute_hook("processRAMDiskCommand", (void*)argPtr, &booterParam, NULL, NULL, NULL, NULL) != EFI_SUCCESS)
								showMessage("ramdisk module not found, please install RamdiskLoader.dylib in /Extra/modules/");
						} 
						else if (strncmp(booterCommand, "norescan", sizeof("norescan")) == 0)
						{
							if (get_env(envgEnableCDROMRescan))
							{
                                safe_set_env(envgEnableCDROMRescan,false);
								break;
							}
						}
						else
						{
							showHelp();
						}
					key = 0;
					showBootPrompt(nextRow, showPrompt);
					break;
				}
				safe_set_env(envgBootVolume, (uint32_t)menuBVR);
				setRootVolume(menuBVR);
                safe_set_env(envgBIOSDev,menuBVR->biosdev);
				break;
				
			case kEscapeKey:
				clearBootArgs();
				break;
                
			case kF5Key:
				// New behavior:
				// Clear gBootVolume to restart the loop
				// if the user enabled rescanning the optical drive.
				// Otherwise boot the default boot volume.
				if (get_env(envgEnableCDROMRescan)) {
					//gBootVolume = NULL;
					safe_set_env(envgBootVolume, (uint32_t)NULL);
					clearBootArgs();
				}
				break;
				
			case kF10Key:
                safe_set_env(envgScanSingleDrive, false);
                
                scanDisks();
                
				//gBootVolume = NULL;
				safe_set_env(envgBootVolume, (uint32_t)NULL);
				
				clearBootArgs();
				break;
                
			default:
				key = 0;
				break;
		}
	} while (0 == key);
	
done:
	if (bootArgs->Video.v_display == VGA_TEXT_MODE) {
		clearScreenRows(kMenuTopRow, kScreenLastRow);
		changeCursor(0, kMenuTopRow, kCursorTypeUnderline, 0);
	}
    safe_set_env(envShouldboot, false);
	
	if (menuItems) {
		free(menuItems);
		menuItems = NULL;
	}
	return 0;
}
예제 #5
0
파일: options.c 프로젝트: aosm/boot
int
getBootOptions(BOOL firstRun)
{
    int     i;
    int     key;
    int     selectIndex = 0;
    int     bvCount;
    int     nextRow;
    int     timeout;
    BVRef   bvr;
    BVRef   bvChain;
    BVRef   menuBVR;
    BOOL    showPrompt, newShowPrompt;
    MenuItem *  menuItems = NULL;

    // Allow user to override default timeout.

    if ( getIntForKey(kTimeoutKey, &timeout) == NO )
    {
        timeout = kBootTimeout;
    }

    // If the user is holding down a shift key,
    // abort quiet mode.
    if ( ( readKeyboardShiftFlags() & 0x0F ) != 0 ) {
        gBootMode &= ~kBootModeQuiet;
    }

    // If user typed F8, abort quiet mode,
    // and display the menu.
    if (flushKeyboardBuffer()) {
        gBootMode &= ~kBootModeQuiet;
        timeout = 0;
    }

    clearBootArgs();

    setCursorPosition( 0, 0, 0 );
    clearScreenRows( 0, kScreenLastRow );
    if ( ! ( gBootMode & kBootModeQuiet ) ) {
        // Display banner and show hardware info. 
        printf( bootBanner, (bootArgs->convmem + bootArgs->extmem) / 1024 );
        printVBEInfo();
    }

    changeCursor( 0, kMenuTopRow, kCursorTypeUnderline, 0 );

    verbose("Scanning device %x...", gBIOSDev);

    // Get a list of bootable volumes on the device.

    bvChain = scanBootVolumes( gBIOSDev, &bvCount );
    gBootVolume = menuBVR = selectBootVolume( bvChain );

#if 0
    // When booting from CD (via HD emulation), default to hard
    // drive boot when possible. 

    if ( gBootVolume->part_type == FDISK_BOOTER &&
         gBootVolume->biosdev   == 0x80 )
    {
        // Scan the original device 0x80 that has been displaced
        // by the CD-ROM.

        BVRef hd_bvr = selectBootVolume(scanBootVolumes(0x81, 0));
        if ( hd_bvr->flags & kBVFlagNativeBoot )
        {
            int key = countdown("Press C to start up from CD-ROM.",
                                kMenuTopRow, 5);
            
            if ( (key & 0x5f) != 'c' )
            {
                gBootVolume = hd_bvr;
                gBIOSDev = hd_bvr->biosdev;
                initKernBootStruct( gBIOSDev );
                goto done;
            }
        }
    }
#endif

    if ( gBootMode & kBootModeQuiet )
    {
        // No input allowed from user.
        goto done;
    }

    if ( firstRun && ( timeout > 0 ) &&
         ( countdown("Press any key to enter startup options.",
                     kMenuTopRow, timeout) == 0 ) )
    {
        goto done;
    }

    if ( bvCount )
    {
        // Allocate memory for an array of menu items.

        menuItems = (MenuItem *) malloc( sizeof(MenuItem) * bvCount );
        if ( menuItems == NULL ) goto done;

        // Associate a menu item for each BVRef.

        for ( bvr = bvChain, i = bvCount - 1, selectIndex = 0;
              bvr; bvr = bvr->next, i-- )
        {
            getBootVolumeDescription( bvr, menuItems[i].name, 80, YES );
            menuItems[i].param = (void *) bvr;
            if ( bvr == menuBVR ) selectIndex = i;
        }
    }

    // Clear screen and hide the blinking cursor.

    clearScreenRows( kMenuTopRow, kMenuTopRow + 2 );
    changeCursor( 0, kMenuTopRow, kCursorTypeHidden, 0 );
    nextRow = kMenuTopRow;
    showPrompt = YES;

    // Show the menu.

    if ( bvCount )
    {
        printf("Use \30\31 keys to select the startup volume.");
        showMenu( menuItems, bvCount, selectIndex, kMenuTopRow + 2, kMenuMaxItems );
        nextRow += min( bvCount, kMenuMaxItems ) + 3;
    }

    // Show the boot prompt.

    showPrompt = (bvCount == 0) || (menuBVR->flags & kBVFlagNativeBoot);
    showBootPrompt( nextRow, showPrompt );

    do {
        key = getc();

        updateMenu( key, (void **) &menuBVR );

        newShowPrompt = (bvCount == 0) ||
                        (menuBVR->flags & kBVFlagNativeBoot);

        if ( newShowPrompt != showPrompt )
        {
            showPrompt = newShowPrompt;
            showBootPrompt( nextRow, showPrompt );
        }
        if ( showPrompt ) updateBootArgs( key );

        switch ( key & kASCIIKeyMask )
        {
            case kReturnKey:
                if ( *gBootArgs == '?' )
                {
                    if ( strcmp( gBootArgs, "?video" ) == 0 ) {
                        printVBEModeInfo();
                    } else if ( strcmp( gBootArgs, "?memory" ) == 0 ) {
                        printMemoryInfo();
                    } else {
                        showHelp();
                    }
                    key = 0;
                    showBootPrompt( nextRow, showPrompt );
                    break;
                }
                gBootVolume = menuBVR;
                break;

            case kEscapeKey:
                clearBootArgs();
                break;

            default:
                key = 0;
        }
    }
    while ( 0 == key );

done:
    firstRun = NO;

    clearScreenRows( kMenuTopRow, kScreenLastRow );
    changeCursor( 0, kMenuTopRow, kCursorTypeUnderline, 0 );

    if ( menuItems ) free(menuItems);

    return 0;
}