xref: /freebsd/sys/dev/syscons/syscons.c (revision 6adf353a56a161443406b44a45d00c688ca7b857)
1 /*-
2  * Copyright (c) 1992-1998 S�ren Schmidt
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  * 1. Redistributions of source code must retain the above copyright
9  *    notice, this list of conditions and the following disclaimer,
10  *    without modification, immediately at the beginning of the file.
11  * 2. Redistributions in binary form must reproduce the above copyright
12  *    notice, this list of conditions and the following disclaimer in the
13  *    documentation and/or other materials provided with the distribution.
14  * 3. The name of the author may not be used to endorse or promote products
15  *    derived from this software without specific prior written permission.
16  *
17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27  *
28  * $FreeBSD$
29  */
30 
31 #include "opt_syscons.h"
32 #include "opt_splash.h"
33 #include "opt_ddb.h"
34 #ifdef __i386__
35 #include "opt_apm.h"
36 #endif
37 
38 #include <sys/param.h>
39 #include <sys/systm.h>
40 #include <sys/conf.h>
41 #include <sys/cons.h>
42 #include <sys/consio.h>
43 #include <sys/eventhandler.h>
44 #include <sys/fbio.h>
45 #include <sys/kbio.h>
46 #include <sys/kernel.h>
47 #include <sys/lock.h>
48 #include <sys/malloc.h>
49 #include <sys/mutex.h>
50 #include <sys/proc.h>
51 #include <sys/random.h>
52 #include <sys/reboot.h>
53 #include <sys/signalvar.h>
54 #include <sys/sysctl.h>
55 #include <sys/tty.h>
56 
57 #include <machine/clock.h>
58 #include <machine/psl.h>
59 #include <machine/pc/display.h>
60 #ifdef __i386__
61 #include <machine/apm_bios.h>
62 #include <machine/frame.h>
63 #endif
64 
65 #include <dev/kbd/kbdreg.h>
66 #include <dev/fb/fbreg.h>
67 #include <dev/fb/splashreg.h>
68 #include <dev/syscons/syscons.h>
69 
70 #define COLD 0
71 #define WARM 1
72 
73 #define DEFAULT_BLANKTIME	(5*60)		/* 5 minutes */
74 #define MAX_BLANKTIME		(7*24*60*60)	/* 7 days!? */
75 
76 #define KEYCODE_BS		0x0e		/* "<-- Backspace" key, XXX */
77 
78 typedef struct default_attr {
79 	int		std_color;		/* normal hardware color */
80 	int		rev_color;		/* reverse hardware color */
81 } default_attr;
82 
83 static default_attr user_default = {
84     SC_NORM_ATTR,
85     SC_NORM_REV_ATTR,
86 };
87 
88 static default_attr kernel_default = {
89     SC_KERNEL_CONS_ATTR,
90     SC_KERNEL_CONS_REV_ATTR,
91 };
92 
93 static	int		sc_console_unit = -1;
94 static  scr_stat    	*sc_console;
95 static	struct tty	*sc_console_tty;
96 static	void		*kernel_console_ts;
97 
98 static  char        	init_done = COLD;
99 static  char		shutdown_in_progress = FALSE;
100 static	char		sc_malloc = FALSE;
101 
102 static	int		saver_mode = CONS_NO_SAVER; /* LKM/user saver */
103 static	int		run_scrn_saver = FALSE;	/* should run the saver? */
104 static	long        	scrn_blank_time = 0;    /* screen saver timeout value */
105 #ifdef DEV_SPLASH
106 static	int     	scrn_blanked;		/* # of blanked screen */
107 static	int		sticky_splash = FALSE;
108 
109 static	void		none_saver(sc_softc_t *sc, int blank) { }
110 static	void		(*current_saver)(sc_softc_t *, int) = none_saver;
111 #endif
112 
113 #if !defined(SC_NO_FONT_LOADING) && defined(SC_DFLT_FONT)
114 #include "font.h"
115 #endif
116 
117 	d_ioctl_t	*sc_user_ioctl;
118 
119 static	bios_values_t	bios_value;
120 
121 static	int		enable_panic_key;
122 SYSCTL_INT(_machdep, OID_AUTO, enable_panic_key, CTLFLAG_RW, &enable_panic_key,
123 	   0, "");
124 
125 #define SC_CONSOLECTL	255
126 
127 #define VIRTUAL_TTY(sc, x) (SC_DEV((sc), (x)) != NULL ?	\
128 	SC_DEV((sc), (x))->si_tty : NULL)
129 #define ISTTYOPEN(tp)	((tp) && ((tp)->t_state & TS_ISOPEN))
130 
131 static	int		debugger;
132 
133 /* prototypes */
134 static int scvidprobe(int unit, int flags, int cons);
135 static int sckbdprobe(int unit, int flags, int cons);
136 static void scmeminit(void *arg);
137 static int scdevtounit(dev_t dev);
138 static kbd_callback_func_t sckbdevent;
139 static int scparam(struct tty *tp, struct termios *t);
140 static void scstart(struct tty *tp);
141 static void scinit(int unit, int flags);
142 #if __i386__
143 static void scterm(int unit, int flags);
144 #endif
145 static void scshutdown(void *arg, int howto);
146 static u_int scgetc(sc_softc_t *sc, u_int flags);
147 #define SCGETC_CN	1
148 #define SCGETC_NONBLOCK	2
149 static int sccngetch(int flags);
150 static void sccnupdate(scr_stat *scp);
151 static scr_stat *alloc_scp(sc_softc_t *sc, int vty);
152 static void init_scp(sc_softc_t *sc, int vty, scr_stat *scp);
153 static timeout_t scrn_timer;
154 static int and_region(int *s1, int *e1, int s2, int e2);
155 static void scrn_update(scr_stat *scp, int show_cursor);
156 
157 #ifdef DEV_SPLASH
158 static int scsplash_callback(int event, void *arg);
159 static void scsplash_saver(sc_softc_t *sc, int show);
160 static int add_scrn_saver(void (*this_saver)(sc_softc_t *, int));
161 static int remove_scrn_saver(void (*this_saver)(sc_softc_t *, int));
162 static int set_scrn_saver_mode(scr_stat *scp, int mode, u_char *pal, int border);
163 static int restore_scrn_saver_mode(scr_stat *scp, int changemode);
164 static void stop_scrn_saver(sc_softc_t *sc, void (*saver)(sc_softc_t *, int));
165 static int wait_scrn_saver_stop(sc_softc_t *sc);
166 #define scsplash_stick(stick)		(sticky_splash = (stick))
167 #else /* !DEV_SPLASH */
168 #define scsplash_stick(stick)
169 #endif /* DEV_SPLASH */
170 
171 static int do_switch_scr(sc_softc_t *sc, int s);
172 static int vt_proc_alive(scr_stat *scp);
173 static int signal_vt_rel(scr_stat *scp);
174 static int signal_vt_acq(scr_stat *scp);
175 static int finish_vt_rel(scr_stat *scp, int release, int *s);
176 static int finish_vt_acq(scr_stat *scp);
177 static void exchange_scr(sc_softc_t *sc);
178 static void update_cursor_image(scr_stat *scp);
179 static void change_cursor_shape(scr_stat *scp, int flags, int base, int height);
180 static int save_kbd_state(scr_stat *scp);
181 static int update_kbd_state(scr_stat *scp, int state, int mask);
182 static int update_kbd_leds(scr_stat *scp, int which);
183 static timeout_t blink_screen;
184 
185 #define	CDEV_MAJOR	12
186 
187 static cn_probe_t	sccnprobe;
188 static cn_init_t	sccninit;
189 static cn_getc_t	sccngetc;
190 static cn_checkc_t	sccncheckc;
191 static cn_putc_t	sccnputc;
192 static cn_dbctl_t	sccndbctl;
193 static cn_term_t	sccnterm;
194 
195 #if __alpha__
196 void sccnattach(void);
197 #endif
198 
199 CONS_DRIVER(sc, sccnprobe, sccninit, sccnterm, sccngetc, sccncheckc, sccnputc,
200 	    sccndbctl);
201 
202 static	d_open_t	scopen;
203 static	d_close_t	scclose;
204 static	d_read_t	scread;
205 static	d_ioctl_t	scioctl;
206 static	d_mmap_t	scmmap;
207 
208 static struct cdevsw sc_cdevsw = {
209 	/* open */	scopen,
210 	/* close */	scclose,
211 	/* read */	scread,
212 	/* write */	ttywrite,
213 	/* ioctl */	scioctl,
214 	/* poll */	ttypoll,
215 	/* mmap */	scmmap,
216 	/* strategy */	nostrategy,
217 	/* name */	"sc",
218 	/* maj */	CDEV_MAJOR,
219 	/* dump */	nodump,
220 	/* psize */	nopsize,
221 	/* flags */	D_TTY,
222 };
223 
224 int
225 sc_probe_unit(int unit, int flags)
226 {
227     if (!scvidprobe(unit, flags, FALSE)) {
228 	if (bootverbose)
229 	    printf("sc%d: no video adapter found.\n", unit);
230 	return ENXIO;
231     }
232 
233     /* syscons will be attached even when there is no keyboard */
234     sckbdprobe(unit, flags, FALSE);
235 
236     return 0;
237 }
238 
239 /* probe video adapters, return TRUE if found */
240 static int
241 scvidprobe(int unit, int flags, int cons)
242 {
243     /*
244      * Access the video adapter driver through the back door!
245      * Video adapter drivers need to be configured before syscons.
246      * However, when syscons is being probed as the low-level console,
247      * they have not been initialized yet.  We force them to initialize
248      * themselves here. XXX
249      */
250     vid_configure(cons ? VIO_PROBE_ONLY : 0);
251 
252     return (vid_find_adapter("*", unit) >= 0);
253 }
254 
255 /* probe the keyboard, return TRUE if found */
256 static int
257 sckbdprobe(int unit, int flags, int cons)
258 {
259     /* access the keyboard driver through the backdoor! */
260     kbd_configure(cons ? KB_CONF_PROBE_ONLY : 0);
261 
262     return (kbd_find_keyboard("*", unit) >= 0);
263 }
264 
265 static char
266 *adapter_name(video_adapter_t *adp)
267 {
268     static struct {
269 	int type;
270 	char *name[2];
271     } names[] = {
272 	{ KD_MONO,	{ "MDA",	"MDA" } },
273 	{ KD_HERCULES,	{ "Hercules",	"Hercules" } },
274 	{ KD_CGA,	{ "CGA",	"CGA" } },
275 	{ KD_EGA,	{ "EGA",	"EGA (mono)" } },
276 	{ KD_VGA,	{ "VGA",	"VGA (mono)" } },
277 	{ KD_PC98,	{ "PC-98x1",	"PC-98x1" } },
278 	{ KD_TGA,	{ "TGA",	"TGA" } },
279 	{ -1,		{ "Unknown",	"Unknown" } },
280     };
281     int i;
282 
283     for (i = 0; names[i].type != -1; ++i)
284 	if (names[i].type == adp->va_type)
285 	    break;
286     return names[i].name[(adp->va_flags & V_ADP_COLOR) ? 0 : 1];
287 }
288 
289 int
290 sc_attach_unit(int unit, int flags)
291 {
292     sc_softc_t *sc;
293     scr_stat *scp;
294 #ifdef SC_PIXEL_MODE
295     video_info_t info;
296 #endif
297     int vc;
298     dev_t dev;
299 
300     flags &= ~SC_KERNEL_CONSOLE;
301 
302     if (sc_console_unit == unit) {
303 	/*
304 	 * If this unit is being used as the system console, we need to
305 	 * adjust some variables and buffers before and after scinit().
306 	 */
307 	/* assert(sc_console != NULL) */
308 	flags |= SC_KERNEL_CONSOLE;
309 	scmeminit(NULL);
310 
311 	scinit(unit, flags);
312 
313 	if (sc_console->tsw->te_size > 0) {
314 	    /* assert(sc_console->ts != NULL); */
315 	    kernel_console_ts = sc_console->ts;
316 	    sc_console->ts = malloc(sc_console->tsw->te_size,
317 				    M_DEVBUF, M_WAITOK);
318 	    bcopy(kernel_console_ts, sc_console->ts, sc_console->tsw->te_size);
319     	    (*sc_console->tsw->te_default_attr)(sc_console,
320 						user_default.std_color,
321 						user_default.rev_color);
322 	}
323     } else {
324 	scinit(unit, flags);
325     }
326 
327     sc = sc_get_softc(unit, flags & SC_KERNEL_CONSOLE);
328     sc->config = flags;
329     scp = SC_STAT(sc->dev[0]);
330     if (sc_console == NULL)	/* sc_console_unit < 0 */
331 	sc_console = scp;
332 
333 #ifdef SC_PIXEL_MODE
334     if ((sc->config & SC_VESA800X600)
335 	&& ((*vidsw[sc->adapter]->get_info)(sc->adp, M_VESA_800x600, &info) == 0)) {
336 #ifdef DEV_SPLASH
337 	if (sc->flags & SC_SPLASH_SCRN)
338 	    splash_term(sc->adp);
339 #endif
340 	sc_set_graphics_mode(scp, NULL, M_VESA_800x600);
341 	sc_set_pixel_mode(scp, NULL, COL, ROW, 16);
342 	sc->initial_mode = M_VESA_800x600;
343 #ifdef DEV_SPLASH
344 	/* put up the splash again! */
345 	if (sc->flags & SC_SPLASH_SCRN)
346     	    splash_init(sc->adp, scsplash_callback, sc);
347 #endif
348     }
349 #endif /* SC_PIXEL_MODE */
350 
351     /* initialize cursor */
352     if (!ISGRAPHSC(scp))
353     	update_cursor_image(scp);
354 
355     /* get screen update going */
356     scrn_timer(sc);
357 
358     /* set up the keyboard */
359     kbd_ioctl(sc->kbd, KDSKBMODE, (caddr_t)&scp->kbd_mode);
360     update_kbd_state(scp, scp->status, LOCK_MASK);
361 
362     printf("sc%d: %s <%d virtual consoles, flags=0x%x>\n",
363 	   unit, adapter_name(sc->adp), sc->vtys, sc->config);
364     if (bootverbose) {
365 	printf("sc%d:", unit);
366     	if (sc->adapter >= 0)
367 	    printf(" fb%d", sc->adapter);
368 	if (sc->keyboard >= 0)
369 	    printf(", kbd%d", sc->keyboard);
370 	if (scp->tsw)
371 	    printf(", terminal emulator: %s (%s)",
372 		   scp->tsw->te_name, scp->tsw->te_desc);
373 	printf("\n");
374     }
375 
376     /* register a shutdown callback for the kernel console */
377     if (sc_console_unit == unit)
378 	EVENTHANDLER_REGISTER(shutdown_pre_sync, scshutdown,
379 			      (void *)(uintptr_t)unit, SHUTDOWN_PRI_DEFAULT);
380 
381     for (vc = 0; vc < sc->vtys; vc++) {
382 	dev = make_dev(&sc_cdevsw, vc + unit * MAXCONS,
383 	    UID_ROOT, GID_WHEEL, 0600, "ttyv%r", vc + unit * MAXCONS);
384 	sc->dev[vc] = dev;
385 	/*
386 	 * The first vty already has struct tty and scr_stat initialized
387 	 * in scinit().  The other vtys will have these structs when
388 	 * first opened.
389 	 */
390     }
391 
392     dev = make_dev(&sc_cdevsw, SC_CONSOLECTL,
393 		   UID_ROOT, GID_WHEEL, 0600, "consolectl");
394     dev->si_tty = sc_console_tty = ttymalloc(sc_console_tty);
395     SC_STAT(dev) = sc_console;
396 
397     return 0;
398 }
399 
400 static void
401 scmeminit(void *arg)
402 {
403     if (sc_malloc)
404 	return;
405     sc_malloc = TRUE;
406 
407     /*
408      * As soon as malloc() becomes functional, we had better allocate
409      * various buffers for the kernel console.
410      */
411 
412     if (sc_console_unit < 0)	/* sc_console == NULL */
413 	return;
414 
415     /* copy the temporary buffer to the final buffer */
416     sc_alloc_scr_buffer(sc_console, FALSE, FALSE);
417 
418 #ifndef SC_NO_CUTPASTE
419     sc_alloc_cut_buffer(sc_console, FALSE);
420 #endif
421 
422 #ifndef SC_NO_HISTORY
423     /* initialize history buffer & pointers */
424     sc_alloc_history_buffer(sc_console, 0, 0, FALSE);
425 #endif
426 }
427 
428 /* XXX */
429 SYSINIT(sc_mem, SI_SUB_KMEM, SI_ORDER_ANY, scmeminit, NULL);
430 
431 static int
432 scdevtounit(dev_t dev)
433 {
434     int vty = SC_VTY(dev);
435 
436     if (vty == SC_CONSOLECTL)
437 	return ((sc_console != NULL) ? sc_console->sc->unit : -1);
438     else if ((vty < 0) || (vty >= MAXCONS*sc_max_unit()))
439 	return -1;
440     else
441 	return vty/MAXCONS;
442 }
443 
444 int
445 scopen(dev_t dev, int flag, int mode, struct proc *p)
446 {
447     int unit = scdevtounit(dev);
448     sc_softc_t *sc;
449     struct tty *tp;
450     scr_stat *scp;
451     keyarg_t key;
452     int error;
453 
454     DPRINTF(5, ("scopen: dev:%d,%d, unit:%d, vty:%d\n",
455 		major(dev), minor(dev), unit, SC_VTY(dev)));
456 
457     sc = sc_get_softc(unit, (sc_console_unit == unit) ? SC_KERNEL_CONSOLE : 0);
458     if (sc == NULL)
459 	return ENXIO;
460 
461     tp = dev->si_tty = ttymalloc(dev->si_tty);
462     tp->t_oproc = scstart;
463     tp->t_param = scparam;
464     tp->t_stop = nottystop;
465     tp->t_dev = dev;
466     if (!ISTTYOPEN(tp)) {
467 	ttychars(tp);
468         /* Use the current setting of the <-- key as default VERASE. */
469         /* If the Delete key is preferable, an stty is necessary     */
470 	if (sc->kbd != NULL) {
471 	    key.keynum = KEYCODE_BS;
472 	    kbd_ioctl(sc->kbd, GIO_KEYMAPENT, (caddr_t)&key);
473             tp->t_cc[VERASE] = key.key.map[0];
474 	}
475 	tp->t_iflag = TTYDEF_IFLAG;
476 	tp->t_oflag = TTYDEF_OFLAG;
477 	tp->t_cflag = TTYDEF_CFLAG;
478 	tp->t_lflag = TTYDEF_LFLAG;
479 	tp->t_ispeed = tp->t_ospeed = TTYDEF_SPEED;
480 	scparam(tp, &tp->t_termios);
481 	(*linesw[tp->t_line].l_modem)(tp, 1);
482     }
483     else
484 	if (tp->t_state & TS_XCLUDE && suser(p))
485 	    return(EBUSY);
486 
487     error = (*linesw[tp->t_line].l_open)(dev, tp);
488 
489     scp = SC_STAT(dev);
490     if (scp == NULL) {
491 	scp = SC_STAT(dev) = alloc_scp(sc, SC_VTY(dev));
492 	if (ISGRAPHSC(scp))
493 	    sc_set_pixel_mode(scp, NULL, COL, ROW, 16);
494     }
495     if (!tp->t_winsize.ws_col && !tp->t_winsize.ws_row) {
496 	tp->t_winsize.ws_col = scp->xsize;
497 	tp->t_winsize.ws_row = scp->ysize;
498     }
499 
500     return error;
501 }
502 
503 int
504 scclose(dev_t dev, int flag, int mode, struct proc *p)
505 {
506     struct tty *tp = dev->si_tty;
507     scr_stat *scp;
508     int s;
509 
510     if (SC_VTY(dev) != SC_CONSOLECTL) {
511 	scp = SC_STAT(tp->t_dev);
512 	/* were we in the middle of the VT switching process? */
513 	DPRINTF(5, ("sc%d: scclose(), ", scp->sc->unit));
514 	s = spltty();
515 	if ((scp == scp->sc->cur_scp) && (scp->sc->unit == sc_console_unit))
516 	    cons_unavail = FALSE;
517 	if (finish_vt_rel(scp, TRUE, &s) == 0)	/* force release */
518 	    DPRINTF(5, ("reset WAIT_REL, "));
519 	if (finish_vt_acq(scp) == 0)		/* force acknowledge */
520 	    DPRINTF(5, ("reset WAIT_ACQ, "));
521 #if not_yet_done
522 	if (scp == &main_console) {
523 	    scp->pid = 0;
524 	    scp->proc = NULL;
525 	    scp->smode.mode = VT_AUTO;
526 	}
527 	else {
528 	    sc_vtb_destroy(&scp->vtb);
529 	    sc_vtb_destroy(&scp->scr);
530 	    sc_free_history_buffer(scp, scp->ysize);
531 	    SC_STAT(dev) = NULL;
532 	    free(scp, M_DEVBUF);
533 	}
534 #else
535 	scp->pid = 0;
536 	scp->proc = NULL;
537 	scp->smode.mode = VT_AUTO;
538 #endif
539 	scp->kbd_mode = K_XLATE;
540 	if (scp == scp->sc->cur_scp)
541 	    kbd_ioctl(scp->sc->kbd, KDSKBMODE, (caddr_t)&scp->kbd_mode);
542 	DPRINTF(5, ("done.\n"));
543     }
544     spltty();
545     (*linesw[tp->t_line].l_close)(tp, flag);
546     ttyclose(tp);
547     spl0();
548     return(0);
549 }
550 
551 int
552 scread(dev_t dev, struct uio *uio, int flag)
553 {
554     sc_touch_scrn_saver();
555     return ttyread(dev, uio, flag);
556 }
557 
558 static int
559 sckbdevent(keyboard_t *thiskbd, int event, void *arg)
560 {
561     sc_softc_t *sc;
562     struct tty *cur_tty;
563     int c;
564     size_t len;
565     u_char *cp;
566 
567     sc = (sc_softc_t *)arg;
568     /* assert(thiskbd == sc->kbd) */
569 
570     switch (event) {
571     case KBDIO_KEYINPUT:
572 	break;
573     case KBDIO_UNLOADING:
574 	sc->kbd = NULL;
575 	sc->keyboard = -1;
576 	kbd_release(thiskbd, (void *)&sc->keyboard);
577 	return 0;
578     default:
579 	return EINVAL;
580     }
581 
582     /*
583      * Loop while there is still input to get from the keyboard.
584      * I don't think this is nessesary, and it doesn't fix
585      * the Xaccel-2.1 keyboard hang, but it can't hurt.		XXX
586      */
587     while ((c = scgetc(sc, SCGETC_NONBLOCK)) != NOKEY) {
588 
589 	cur_tty = VIRTUAL_TTY(sc, sc->cur_scp->index);
590 	if (!ISTTYOPEN(cur_tty)) {
591 	    cur_tty = sc_console_tty;
592 	    if (!ISTTYOPEN(cur_tty))
593 		continue;
594 	}
595 
596 	if ((*sc->cur_scp->tsw->te_input)(sc->cur_scp, c, cur_tty))
597 	    continue;
598 
599 	switch (KEYFLAGS(c)) {
600 	case 0x0000: /* normal key */
601 	    (*linesw[cur_tty->t_line].l_rint)(KEYCHAR(c), cur_tty);
602 	    break;
603 	case FKEY:  /* function key, return string */
604 	    cp = kbd_get_fkeystr(thiskbd, KEYCHAR(c), &len);
605 	    if (cp != NULL) {
606 	    	while (len-- >  0)
607 		    (*linesw[cur_tty->t_line].l_rint)(*cp++, cur_tty);
608 	    }
609 	    break;
610 	case MKEY:  /* meta is active, prepend ESC */
611 	    (*linesw[cur_tty->t_line].l_rint)(0x1b, cur_tty);
612 	    (*linesw[cur_tty->t_line].l_rint)(KEYCHAR(c), cur_tty);
613 	    break;
614 	case BKEY:  /* backtab fixed sequence (esc [ Z) */
615 	    (*linesw[cur_tty->t_line].l_rint)(0x1b, cur_tty);
616 	    (*linesw[cur_tty->t_line].l_rint)('[', cur_tty);
617 	    (*linesw[cur_tty->t_line].l_rint)('Z', cur_tty);
618 	    break;
619 	}
620     }
621 
622     sc->cur_scp->status |= MOUSE_HIDDEN;
623 
624     return 0;
625 }
626 
627 static int
628 scparam(struct tty *tp, struct termios *t)
629 {
630     tp->t_ispeed = t->c_ispeed;
631     tp->t_ospeed = t->c_ospeed;
632     tp->t_cflag = t->c_cflag;
633     return 0;
634 }
635 
636 int
637 scioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p)
638 {
639     int error;
640     int i;
641     struct tty *tp;
642     sc_softc_t *sc;
643     scr_stat *scp;
644     int s;
645 
646     tp = dev->si_tty;
647 
648     /* If there is a user_ioctl function call that first */
649     if (sc_user_ioctl) {
650 	error = (*sc_user_ioctl)(dev, cmd, data, flag, p);
651 	if (error != ENOIOCTL)
652 	    return error;
653     }
654 
655     error = sc_vid_ioctl(tp, cmd, data, flag, p);
656     if (error != ENOIOCTL)
657 	return error;
658 
659 #ifndef SC_NO_HISTORY
660     error = sc_hist_ioctl(tp, cmd, data, flag, p);
661     if (error != ENOIOCTL)
662 	return error;
663 #endif
664 
665 #ifndef SC_NO_SYSMOUSE
666     error = sc_mouse_ioctl(tp, cmd, data, flag, p);
667     if (error != ENOIOCTL)
668 	return error;
669 #endif
670 
671     scp = SC_STAT(tp->t_dev);
672     /* assert(scp != NULL) */
673     /* scp is sc_console, if SC_VTY(dev) == SC_CONSOLECTL. */
674     sc = scp->sc;
675 
676     if (scp->tsw) {
677 	error = (*scp->tsw->te_ioctl)(scp, tp, cmd, data, flag, p);
678 	if (error != ENOIOCTL)
679 	    return error;
680     }
681 
682     switch (cmd) {  		/* process console hardware related ioctl's */
683 
684     case GIO_ATTR:      	/* get current attributes */
685 	/* this ioctl is not processed here, but in the terminal emulator */
686 	return ENOTTY;
687 
688     case GIO_COLOR:     	/* is this a color console ? */
689 	*(int *)data = (sc->adp->va_flags & V_ADP_COLOR) ? 1 : 0;
690 	return 0;
691 
692     case CONS_BLANKTIME:    	/* set screen saver timeout (0 = no saver) */
693 	if (*(int *)data < 0 || *(int *)data > MAX_BLANKTIME)
694             return EINVAL;
695 	s = spltty();
696 	scrn_blank_time = *(int *)data;
697 	run_scrn_saver = (scrn_blank_time != 0);
698 	splx(s);
699 	return 0;
700 
701     case CONS_CURSORTYPE:   	/* set cursor type (obsolete) */
702 	s = spltty();
703 	*(int *)data &= CONS_CURSOR_ATTRS;
704 	sc_change_cursor_shape(scp, *(int *)data, -1, -1);
705 	splx(s);
706 	return 0;
707 
708     case CONS_GETCURSORSHAPE:   /* get cursor shape (new interface) */
709 	if (((int *)data)[0] & CONS_LOCAL_CURSOR) {
710 	    ((int *)data)[0] = scp->curr_curs_attr.flags;
711 	    ((int *)data)[1] = scp->curr_curs_attr.base;
712 	    ((int *)data)[2] = scp->curr_curs_attr.height;
713 	} else {
714 	    ((int *)data)[0] = sc->curs_attr.flags;
715 	    ((int *)data)[1] = sc->curs_attr.base;
716 	    ((int *)data)[2] = sc->curs_attr.height;
717 	}
718 	return 0;
719 
720     case CONS_SETCURSORSHAPE:   /* set cursor shape (new interface) */
721 	s = spltty();
722 	sc_change_cursor_shape(scp, ((int *)data)[0],
723 	    ((int *)data)[1], ((int *)data)[2]);
724 	splx(s);
725 	return 0;
726 
727     case CONS_BELLTYPE: 	/* set bell type sound/visual */
728 	if ((*(int *)data) & 0x01)
729 	    sc->flags |= SC_VISUAL_BELL;
730 	else
731 	    sc->flags &= ~SC_VISUAL_BELL;
732 	if ((*(int *)data) & 0x02)
733 	    sc->flags |= SC_QUIET_BELL;
734 	else
735 	    sc->flags &= ~SC_QUIET_BELL;
736 	return 0;
737 
738     case CONS_GETINFO:  	/* get current (virtual) console info */
739     {
740 	vid_info_t *ptr = (vid_info_t*)data;
741 	if (ptr->size == sizeof(struct vid_info)) {
742 	    ptr->m_num = sc->cur_scp->index;
743 	    ptr->mv_col = scp->xpos;
744 	    ptr->mv_row = scp->ypos;
745 	    ptr->mv_csz = scp->xsize;
746 	    ptr->mv_rsz = scp->ysize;
747 	    /*
748 	     * The following fields are filled by the terminal emulator. XXX
749 	     *
750 	     * ptr->mv_norm.fore
751 	     * ptr->mv_norm.back
752 	     * ptr->mv_rev.fore
753 	     * ptr->mv_rev.back
754 	     */
755 	    ptr->mv_grfc.fore = 0;      /* not supported */
756 	    ptr->mv_grfc.back = 0;      /* not supported */
757 	    ptr->mv_ovscan = scp->border;
758 	    if (scp == sc->cur_scp)
759 		save_kbd_state(scp);
760 	    ptr->mk_keylock = scp->status & LOCK_MASK;
761 	    return 0;
762 	}
763 	return EINVAL;
764     }
765 
766     case CONS_GETVERS:  	/* get version number */
767 	*(int*)data = 0x200;    /* version 2.0 */
768 	return 0;
769 
770     case CONS_IDLE:		/* see if the screen has been idle */
771 	/*
772 	 * When the screen is in the GRAPHICS_MODE or UNKNOWN_MODE,
773 	 * the user process may have been writing something on the
774 	 * screen and syscons is not aware of it. Declare the screen
775 	 * is NOT idle if it is in one of these modes. But there is
776 	 * an exception to it; if a screen saver is running in the
777 	 * graphics mode in the current screen, we should say that the
778 	 * screen has been idle.
779 	 */
780 	*(int *)data = (sc->flags & SC_SCRN_IDLE)
781 		       && (!ISGRAPHSC(sc->cur_scp)
782 			   || (sc->cur_scp->status & SAVER_RUNNING));
783 	return 0;
784 
785     case CONS_SAVERMODE:	/* set saver mode */
786 	switch(*(int *)data) {
787 	case CONS_NO_SAVER:
788 	case CONS_USR_SAVER:
789 	    /* if a LKM screen saver is running, stop it first. */
790 	    scsplash_stick(FALSE);
791 	    saver_mode = *(int *)data;
792 	    s = spltty();
793 #ifdef DEV_SPLASH
794 	    if ((error = wait_scrn_saver_stop(NULL))) {
795 		splx(s);
796 		return error;
797 	    }
798 #endif
799 	    run_scrn_saver = TRUE;
800 	    if (saver_mode == CONS_USR_SAVER)
801 		scp->status |= SAVER_RUNNING;
802 	    else
803 		scp->status &= ~SAVER_RUNNING;
804 	    scsplash_stick(TRUE);
805 	    splx(s);
806 	    break;
807 	case CONS_LKM_SAVER:
808 	    s = spltty();
809 	    if ((saver_mode == CONS_USR_SAVER) && (scp->status & SAVER_RUNNING))
810 		scp->status &= ~SAVER_RUNNING;
811 	    saver_mode = *(int *)data;
812 	    splx(s);
813 	    break;
814 	default:
815 	    return EINVAL;
816 	}
817 	return 0;
818 
819     case CONS_SAVERSTART:	/* immediately start/stop the screen saver */
820 	/*
821 	 * Note that this ioctl does not guarantee the screen saver
822 	 * actually starts or stops. It merely attempts to do so...
823 	 */
824 	s = spltty();
825 	run_scrn_saver = (*(int *)data != 0);
826 	if (run_scrn_saver)
827 	    sc->scrn_time_stamp -= scrn_blank_time;
828 	splx(s);
829 	return 0;
830 
831     case CONS_SCRSHOT:		/* get a screen shot */
832     {
833 	scrshot_t *ptr = (scrshot_t*)data;
834 	s = spltty();
835 	if (ISGRAPHSC(scp)) {
836 	    splx(s);
837 	    return EOPNOTSUPP;
838 	}
839 	if (scp->xsize != ptr->xsize || scp->ysize != ptr->ysize) {
840 	    splx(s);
841 	    return EINVAL;
842 	}
843 	copyout ((void*)scp->vtb.vtb_buffer, ptr->buf,
844 		 ptr->xsize * ptr->ysize * sizeof(u_int16_t));
845 	splx(s);
846 	return 0;
847     }
848 
849     case VT_SETMODE:    	/* set screen switcher mode */
850     {
851 	struct vt_mode *mode;
852 	struct proc *p1;
853 
854 	mode = (struct vt_mode *)data;
855 	DPRINTF(5, ("sc%d: VT_SETMODE ", sc->unit));
856 	if (scp->smode.mode == VT_PROCESS) {
857 	    p1 = pfind(scp->pid);
858     	    if (scp->proc == p1 && scp->proc != p) {
859 		if (p1)
860 		    PROC_UNLOCK(p1);
861 		DPRINTF(5, ("error EPERM\n"));
862 		return EPERM;
863 	    }
864 	    if (p1)
865 		PROC_UNLOCK(p1);
866 	}
867 	s = spltty();
868 	if (mode->mode == VT_AUTO) {
869 	    scp->smode.mode = VT_AUTO;
870 	    scp->proc = NULL;
871 	    scp->pid = 0;
872 	    DPRINTF(5, ("VT_AUTO, "));
873 	    if ((scp == sc->cur_scp) && (sc->unit == sc_console_unit))
874 		cons_unavail = FALSE;
875 	    /* were we in the middle of the vty switching process? */
876 	    if (finish_vt_rel(scp, TRUE, &s) == 0)
877 		DPRINTF(5, ("reset WAIT_REL, "));
878 	    if (finish_vt_acq(scp) == 0)
879 		DPRINTF(5, ("reset WAIT_ACQ, "));
880 	} else {
881 	    if (!ISSIGVALID(mode->relsig) || !ISSIGVALID(mode->acqsig)
882 		|| !ISSIGVALID(mode->frsig)) {
883 		splx(s);
884 		DPRINTF(5, ("error EINVAL\n"));
885 		return EINVAL;
886 	    }
887 	    DPRINTF(5, ("VT_PROCESS %d, ", p->p_pid));
888 	    bcopy(data, &scp->smode, sizeof(struct vt_mode));
889 	    scp->proc = p;
890 	    scp->pid = scp->proc->p_pid;
891 	    if ((scp == sc->cur_scp) && (sc->unit == sc_console_unit))
892 		cons_unavail = TRUE;
893 	}
894 	splx(s);
895 	DPRINTF(5, ("\n"));
896 	return 0;
897     }
898 
899     case VT_GETMODE:    	/* get screen switcher mode */
900 	bcopy(&scp->smode, data, sizeof(struct vt_mode));
901 	return 0;
902 
903     case VT_RELDISP:    	/* screen switcher ioctl */
904 	s = spltty();
905 	/*
906 	 * This must be the current vty which is in the VT_PROCESS
907 	 * switching mode...
908 	 */
909 	if ((scp != sc->cur_scp) || (scp->smode.mode != VT_PROCESS)) {
910 	    splx(s);
911 	    return EINVAL;
912 	}
913 	/* ...and this process is controlling it. */
914 	if (scp->proc != p) {
915 	    splx(s);
916 	    return EPERM;
917 	}
918 	error = EINVAL;
919 	switch(*(int *)data) {
920 	case VT_FALSE:  	/* user refuses to release screen, abort */
921 	    if ((error = finish_vt_rel(scp, FALSE, &s)) == 0)
922 		DPRINTF(5, ("sc%d: VT_FALSE\n", sc->unit));
923 	    break;
924 	case VT_TRUE:   	/* user has released screen, go on */
925 	    if ((error = finish_vt_rel(scp, TRUE, &s)) == 0)
926 		DPRINTF(5, ("sc%d: VT_TRUE\n", sc->unit));
927 	    break;
928 	case VT_ACKACQ: 	/* acquire acknowledged, switch completed */
929 	    if ((error = finish_vt_acq(scp)) == 0)
930 		DPRINTF(5, ("sc%d: VT_ACKACQ\n", sc->unit));
931 	    break;
932 	default:
933 	    break;
934 	}
935 	splx(s);
936 	return error;
937 
938     case VT_OPENQRY:    	/* return free virtual console */
939 	for (i = sc->first_vty; i < sc->first_vty + sc->vtys; i++) {
940 	    tp = VIRTUAL_TTY(sc, i);
941 	    if (!ISTTYOPEN(tp)) {
942 		*(int *)data = i + 1;
943 		return 0;
944 	    }
945 	}
946 	return EINVAL;
947 
948     case VT_ACTIVATE:   	/* switch to screen *data */
949 	i = (*(int *)data == 0) ? scp->index : (*(int *)data - 1);
950 	s = spltty();
951 	sc_clean_up(sc->cur_scp);
952 	splx(s);
953 	return sc_switch_scr(sc, i);
954 
955     case VT_WAITACTIVE: 	/* wait for switch to occur */
956 	i = (*(int *)data == 0) ? scp->index : (*(int *)data - 1);
957 	if ((i < sc->first_vty) || (i >= sc->first_vty + sc->vtys))
958 	    return EINVAL;
959 	s = spltty();
960 	error = sc_clean_up(sc->cur_scp);
961 	splx(s);
962 	if (error)
963 	    return error;
964 	scp = SC_STAT(SC_DEV(sc, i));
965 	if (scp == scp->sc->cur_scp)
966 	    return 0;
967 	while ((error=tsleep((caddr_t)&scp->smode, PZERO|PCATCH,
968 			     "waitvt", 0)) == ERESTART) ;
969 	return error;
970 
971     case VT_GETACTIVE:		/* get active vty # */
972 	*(int *)data = sc->cur_scp->index + 1;
973 	return 0;
974 
975     case VT_GETINDEX:		/* get this vty # */
976 	*(int *)data = scp->index + 1;
977 	return 0;
978 
979     case KDENABIO:      	/* allow io operations */
980 	error = suser(p);
981 	if (error != 0)
982 	    return error;
983 	if (securelevel > 0)
984 	    return EPERM;
985 #ifdef __i386__
986 	p->p_frame->tf_eflags |= PSL_IOPL;
987 #endif
988 	return 0;
989 
990     case KDDISABIO:     	/* disallow io operations (default) */
991 #ifdef __i386__
992 	p->p_frame->tf_eflags &= ~PSL_IOPL;
993 #endif
994 	return 0;
995 
996     case KDSKBSTATE:    	/* set keyboard state (locks) */
997 	if (*(int *)data & ~LOCK_MASK)
998 	    return EINVAL;
999 	scp->status &= ~LOCK_MASK;
1000 	scp->status |= *(int *)data;
1001 	if (scp == sc->cur_scp)
1002 	    update_kbd_state(scp, scp->status, LOCK_MASK);
1003 	return 0;
1004 
1005     case KDGKBSTATE:    	/* get keyboard state (locks) */
1006 	if (scp == sc->cur_scp)
1007 	    save_kbd_state(scp);
1008 	*(int *)data = scp->status & LOCK_MASK;
1009 	return 0;
1010 
1011     case KDGETREPEAT:      	/* get keyboard repeat & delay rates */
1012     case KDSETREPEAT:      	/* set keyboard repeat & delay rates (new) */
1013 	error = kbd_ioctl(sc->kbd, cmd, data);
1014 	if (error == ENOIOCTL)
1015 	    error = ENODEV;
1016 	return error;
1017 
1018     case KDSETRAD:      	/* set keyboard repeat & delay rates (old) */
1019 	if (*(int *)data & ~0x7f)
1020 	    return EINVAL;
1021 	error = kbd_ioctl(sc->kbd, cmd, data);
1022 	if (error == ENOIOCTL)
1023 	    error = ENODEV;
1024 	return error;
1025 
1026     case KDSKBMODE:     	/* set keyboard mode */
1027 	switch (*(int *)data) {
1028 	case K_XLATE:   	/* switch to XLT ascii mode */
1029 	case K_RAW: 		/* switch to RAW scancode mode */
1030 	case K_CODE: 		/* switch to CODE mode */
1031 	    scp->kbd_mode = *(int *)data;
1032 	    if (scp == sc->cur_scp)
1033 		kbd_ioctl(sc->kbd, cmd, data);
1034 	    return 0;
1035 	default:
1036 	    return EINVAL;
1037 	}
1038 	/* NOT REACHED */
1039 
1040     case KDGKBMODE:     	/* get keyboard mode */
1041 	*(int *)data = scp->kbd_mode;
1042 	return 0;
1043 
1044     case KDGKBINFO:
1045 	error = kbd_ioctl(sc->kbd, cmd, data);
1046 	if (error == ENOIOCTL)
1047 	    error = ENODEV;
1048 	return error;
1049 
1050     case KDMKTONE:      	/* sound the bell */
1051 	if (*(int*)data)
1052 	    sc_bell(scp, (*(int*)data)&0xffff,
1053 		    (((*(int*)data)>>16)&0xffff)*hz/1000);
1054 	else
1055 	    sc_bell(scp, scp->bell_pitch, scp->bell_duration);
1056 	return 0;
1057 
1058     case KIOCSOUND:     	/* make tone (*data) hz */
1059 	if (scp == sc->cur_scp) {
1060 	    if (*(int *)data)
1061 		return sc_tone(*(int *)data);
1062 	    else
1063 		return sc_tone(0);
1064 	}
1065 	return 0;
1066 
1067     case KDGKBTYPE:     	/* get keyboard type */
1068 	error = kbd_ioctl(sc->kbd, cmd, data);
1069 	if (error == ENOIOCTL) {
1070 	    /* always return something? XXX */
1071 	    *(int *)data = 0;
1072 	}
1073 	return 0;
1074 
1075     case KDSETLED:      	/* set keyboard LED status */
1076 	if (*(int *)data & ~LED_MASK)	/* FIXME: LOCK_MASK? */
1077 	    return EINVAL;
1078 	scp->status &= ~LED_MASK;
1079 	scp->status |= *(int *)data;
1080 	if (scp == sc->cur_scp)
1081 	    update_kbd_leds(scp, scp->status);
1082 	return 0;
1083 
1084     case KDGETLED:      	/* get keyboard LED status */
1085 	if (scp == sc->cur_scp)
1086 	    save_kbd_state(scp);
1087 	*(int *)data = scp->status & LED_MASK;
1088 	return 0;
1089 
1090     case CONS_SETKBD: 		/* set the new keyboard */
1091 	{
1092 	    keyboard_t *newkbd;
1093 
1094 	    s = spltty();
1095 	    newkbd = kbd_get_keyboard(*(int *)data);
1096 	    if (newkbd == NULL) {
1097 		splx(s);
1098 		return EINVAL;
1099 	    }
1100 	    error = 0;
1101 	    if (sc->kbd != newkbd) {
1102 		i = kbd_allocate(newkbd->kb_name, newkbd->kb_unit,
1103 				 (void *)&sc->keyboard, sckbdevent, sc);
1104 		/* i == newkbd->kb_index */
1105 		if (i >= 0) {
1106 		    if (sc->kbd != NULL) {
1107 			save_kbd_state(sc->cur_scp);
1108 			kbd_release(sc->kbd, (void *)&sc->keyboard);
1109 		    }
1110 		    sc->kbd = kbd_get_keyboard(i); /* sc->kbd == newkbd */
1111 		    sc->keyboard = i;
1112 		    kbd_ioctl(sc->kbd, KDSKBMODE,
1113 			      (caddr_t)&sc->cur_scp->kbd_mode);
1114 		    update_kbd_state(sc->cur_scp, sc->cur_scp->status,
1115 				     LOCK_MASK);
1116 		} else {
1117 		    error = EPERM;	/* XXX */
1118 		}
1119 	    }
1120 	    splx(s);
1121 	    return error;
1122 	}
1123 
1124     case CONS_RELKBD: 		/* release the current keyboard */
1125 	s = spltty();
1126 	error = 0;
1127 	if (sc->kbd != NULL) {
1128 	    save_kbd_state(sc->cur_scp);
1129 	    error = kbd_release(sc->kbd, (void *)&sc->keyboard);
1130 	    if (error == 0) {
1131 		sc->kbd = NULL;
1132 		sc->keyboard = -1;
1133 	    }
1134 	}
1135 	splx(s);
1136 	return error;
1137 
1138     case CONS_GETTERM:		/* get the current terminal emulator info */
1139 	{
1140 	    sc_term_sw_t *sw;
1141 
1142 	    if (((term_info_t *)data)->ti_index == 0) {
1143 		sw = scp->tsw;
1144 	    } else {
1145 		sw = sc_term_match_by_number(((term_info_t *)data)->ti_index);
1146 	    }
1147 	    if (sw != NULL) {
1148 		strncpy(((term_info_t *)data)->ti_name, sw->te_name,
1149 			sizeof(((term_info_t *)data)->ti_name));
1150 		strncpy(((term_info_t *)data)->ti_desc, sw->te_desc,
1151 			sizeof(((term_info_t *)data)->ti_desc));
1152 		((term_info_t *)data)->ti_flags = 0;
1153 		return 0;
1154 	    } else {
1155 		((term_info_t *)data)->ti_name[0] = '\0';
1156 		((term_info_t *)data)->ti_desc[0] = '\0';
1157 		((term_info_t *)data)->ti_flags = 0;
1158 		return EINVAL;
1159 	    }
1160 	}
1161 
1162     case CONS_SETTERM:		/* set the current terminal emulator */
1163 	s = spltty();
1164 	error = sc_init_emulator(scp, ((term_info_t *)data)->ti_name);
1165 	/* FIXME: what if scp == sc_console! XXX */
1166 	splx(s);
1167 	return error;
1168 
1169     case GIO_SCRNMAP:   	/* get output translation table */
1170 	bcopy(&sc->scr_map, data, sizeof(sc->scr_map));
1171 	return 0;
1172 
1173     case PIO_SCRNMAP:   	/* set output translation table */
1174 	bcopy(data, &sc->scr_map, sizeof(sc->scr_map));
1175 	for (i=0; i<sizeof(sc->scr_map); i++) {
1176 	    sc->scr_rmap[sc->scr_map[i]] = i;
1177 	}
1178 	return 0;
1179 
1180     case GIO_KEYMAP:		/* get keyboard translation table */
1181     case PIO_KEYMAP:		/* set keyboard translation table */
1182     case GIO_DEADKEYMAP:	/* get accent key translation table */
1183     case PIO_DEADKEYMAP:	/* set accent key translation table */
1184     case GETFKEY:		/* get function key string */
1185     case SETFKEY:		/* set function key string */
1186 	error = kbd_ioctl(sc->kbd, cmd, data);
1187 	if (error == ENOIOCTL)
1188 	    error = ENODEV;
1189 	return error;
1190 
1191 #ifndef SC_NO_FONT_LOADING
1192 
1193     case PIO_FONT8x8:   	/* set 8x8 dot font */
1194 	if (!ISFONTAVAIL(sc->adp->va_flags))
1195 	    return ENXIO;
1196 	bcopy(data, sc->font_8, 8*256);
1197 	sc->fonts_loaded |= FONT_8;
1198 	/*
1199 	 * FONT KLUDGE
1200 	 * Always use the font page #0. XXX
1201 	 * Don't load if the current font size is not 8x8.
1202 	 */
1203 	if (ISTEXTSC(sc->cur_scp) && (sc->cur_scp->font_size < 14))
1204 	    sc_load_font(sc->cur_scp, 0, 8, sc->font_8, 0, 256);
1205 	return 0;
1206 
1207     case GIO_FONT8x8:   	/* get 8x8 dot font */
1208 	if (!ISFONTAVAIL(sc->adp->va_flags))
1209 	    return ENXIO;
1210 	if (sc->fonts_loaded & FONT_8) {
1211 	    bcopy(sc->font_8, data, 8*256);
1212 	    return 0;
1213 	}
1214 	else
1215 	    return ENXIO;
1216 
1217     case PIO_FONT8x14:  	/* set 8x14 dot font */
1218 	if (!ISFONTAVAIL(sc->adp->va_flags))
1219 	    return ENXIO;
1220 	bcopy(data, sc->font_14, 14*256);
1221 	sc->fonts_loaded |= FONT_14;
1222 	/*
1223 	 * FONT KLUDGE
1224 	 * Always use the font page #0. XXX
1225 	 * Don't load if the current font size is not 8x14.
1226 	 */
1227 	if (ISTEXTSC(sc->cur_scp)
1228 	    && (sc->cur_scp->font_size >= 14)
1229 	    && (sc->cur_scp->font_size < 16))
1230 	    sc_load_font(sc->cur_scp, 0, 14, sc->font_14, 0, 256);
1231 	return 0;
1232 
1233     case GIO_FONT8x14:  	/* get 8x14 dot font */
1234 	if (!ISFONTAVAIL(sc->adp->va_flags))
1235 	    return ENXIO;
1236 	if (sc->fonts_loaded & FONT_14) {
1237 	    bcopy(sc->font_14, data, 14*256);
1238 	    return 0;
1239 	}
1240 	else
1241 	    return ENXIO;
1242 
1243     case PIO_FONT8x16:  	/* set 8x16 dot font */
1244 	if (!ISFONTAVAIL(sc->adp->va_flags))
1245 	    return ENXIO;
1246 	bcopy(data, sc->font_16, 16*256);
1247 	sc->fonts_loaded |= FONT_16;
1248 	/*
1249 	 * FONT KLUDGE
1250 	 * Always use the font page #0. XXX
1251 	 * Don't load if the current font size is not 8x16.
1252 	 */
1253 	if (ISTEXTSC(sc->cur_scp) && (sc->cur_scp->font_size >= 16))
1254 	    sc_load_font(sc->cur_scp, 0, 16, sc->font_16, 0, 256);
1255 	return 0;
1256 
1257     case GIO_FONT8x16:  	/* get 8x16 dot font */
1258 	if (!ISFONTAVAIL(sc->adp->va_flags))
1259 	    return ENXIO;
1260 	if (sc->fonts_loaded & FONT_16) {
1261 	    bcopy(sc->font_16, data, 16*256);
1262 	    return 0;
1263 	}
1264 	else
1265 	    return ENXIO;
1266 
1267 #endif /* SC_NO_FONT_LOADING */
1268 
1269     default:
1270 	break;
1271     }
1272 
1273     error = (*linesw[tp->t_line].l_ioctl)(tp, cmd, data, flag, p);
1274     if (error != ENOIOCTL)
1275 	return(error);
1276     error = ttioctl(tp, cmd, data, flag);
1277     if (error != ENOIOCTL)
1278 	return(error);
1279     return(ENOTTY);
1280 }
1281 
1282 static void
1283 scstart(struct tty *tp)
1284 {
1285     struct clist *rbp;
1286     int s, len;
1287     u_char buf[PCBURST];
1288     scr_stat *scp = SC_STAT(tp->t_dev);
1289 
1290     if (scp->status & SLKED || scp->sc->blink_in_progress)
1291 	return;
1292     s = spltty();
1293     if (!(tp->t_state & (TS_TIMEOUT | TS_BUSY | TS_TTSTOP))) {
1294 	tp->t_state |= TS_BUSY;
1295 	rbp = &tp->t_outq;
1296 	while (rbp->c_cc) {
1297 	    len = q_to_b(rbp, buf, PCBURST);
1298 	    splx(s);
1299 	    sc_puts(scp, buf, len);
1300 	    s = spltty();
1301 	}
1302 	tp->t_state &= ~TS_BUSY;
1303 	ttwwakeup(tp);
1304     }
1305     splx(s);
1306 }
1307 
1308 static void
1309 sccnprobe(struct consdev *cp)
1310 {
1311 #if __i386__
1312     int unit;
1313     int flags;
1314 
1315     cp->cn_pri = sc_get_cons_priority(&unit, &flags);
1316 
1317     /* a video card is always required */
1318     if (!scvidprobe(unit, flags, TRUE))
1319 	cp->cn_pri = CN_DEAD;
1320 
1321     /* syscons will become console even when there is no keyboard */
1322     sckbdprobe(unit, flags, TRUE);
1323 
1324     if (cp->cn_pri == CN_DEAD)
1325 	return;
1326 
1327     /* initialize required fields */
1328     cp->cn_dev = makedev(CDEV_MAJOR, SC_CONSOLECTL);
1329 #endif /* __i386__ */
1330 
1331 #if __alpha__
1332     /*
1333      * alpha use sccnattach() rather than cnprobe()/cninit()/cnterm()
1334      * interface to install the console.  Always return CN_DEAD from
1335      * here.
1336      */
1337     cp->cn_pri = CN_DEAD;
1338 #endif /* __alpha__ */
1339 }
1340 
1341 static void
1342 sccninit(struct consdev *cp)
1343 {
1344 #if __i386__
1345     int unit;
1346     int flags;
1347 
1348     sc_get_cons_priority(&unit, &flags);
1349     scinit(unit, flags | SC_KERNEL_CONSOLE);
1350     sc_console_unit = unit;
1351     sc_console = SC_STAT(sc_get_softc(unit, SC_KERNEL_CONSOLE)->dev[0]);
1352 #endif /* __i386__ */
1353 
1354 #if __alpha__
1355     /* SHOULDN'T REACH HERE */
1356 #endif /* __alpha__ */
1357 }
1358 
1359 static void
1360 sccnterm(struct consdev *cp)
1361 {
1362     /* we are not the kernel console any more, release everything */
1363 
1364     if (sc_console_unit < 0)
1365 	return;			/* shouldn't happen */
1366 
1367 #if __i386__
1368 #if 0 /* XXX */
1369     sc_clear_screen(sc_console);
1370     sccnupdate(sc_console);
1371 #endif
1372     scterm(sc_console_unit, SC_KERNEL_CONSOLE);
1373     sc_console_unit = -1;
1374     sc_console = NULL;
1375 #endif /* __i386__ */
1376 
1377 #if __alpha__
1378     /* do nothing XXX */
1379 #endif /* __alpha__ */
1380 }
1381 
1382 #ifdef __alpha__
1383 
1384 void
1385 sccnattach(void)
1386 {
1387     static struct consdev consdev;
1388     int unit;
1389     int flags;
1390 
1391     bcopy(&sc_consdev, &consdev, sizeof(sc_consdev));
1392     consdev.cn_pri = sc_get_cons_priority(&unit, &flags);
1393 
1394     /* a video card is always required */
1395     if (!scvidprobe(unit, flags, TRUE))
1396 	consdev.cn_pri = CN_DEAD;
1397 
1398     /* alpha doesn't allow the console being without a keyboard... Why? */
1399     if (!sckbdprobe(unit, flags, TRUE))
1400 	consdev.cn_pri = CN_DEAD;
1401 
1402     if (consdev.cn_pri == CN_DEAD)
1403 	return;
1404 
1405     scinit(unit, flags | SC_KERNEL_CONSOLE);
1406     sc_console_unit = unit;
1407     sc_console = SC_STAT(sc_get_softc(unit, SC_KERNEL_CONSOLE)->dev[0]);
1408     consdev.cn_dev = makedev(CDEV_MAJOR, 0);
1409     cn_tab = &consdev;
1410 }
1411 
1412 #endif /* __alpha__ */
1413 
1414 static void
1415 sccnputc(dev_t dev, int c)
1416 {
1417     u_char buf[1];
1418     scr_stat *scp = sc_console;
1419     void *save;
1420 #ifndef SC_NO_HISTORY
1421     struct tty *tp;
1422 #endif /* !SC_NO_HISTORY */
1423     int s;
1424 
1425     /* assert(sc_console != NULL) */
1426 
1427 #ifndef SC_NO_HISTORY
1428     if (scp == scp->sc->cur_scp && scp->status & SLKED) {
1429 	scp->status &= ~SLKED;
1430 	update_kbd_state(scp, scp->status, SLKED);
1431 	if (scp->status & BUFFER_SAVED) {
1432 	    if (!sc_hist_restore(scp))
1433 		sc_remove_cutmarking(scp);
1434 	    scp->status &= ~BUFFER_SAVED;
1435 	    scp->status |= CURSOR_ENABLED;
1436 	    sc_draw_cursor_image(scp);
1437 	}
1438 	tp = VIRTUAL_TTY(scp->sc, scp->index);
1439 	if (ISTTYOPEN(tp))
1440 	    scstart(tp);
1441     }
1442 #endif /* !SC_NO_HISTORY */
1443 
1444     save = scp->ts;
1445     if (kernel_console_ts != NULL)
1446 	scp->ts = kernel_console_ts;
1447     buf[0] = c;
1448     sc_puts(scp, buf, 1);
1449     scp->ts = save;
1450 
1451     s = spltty();	/* block sckbdevent and scrn_timer */
1452     sccnupdate(scp);
1453     splx(s);
1454 }
1455 
1456 static int
1457 sccngetc(dev_t dev)
1458 {
1459     return sccngetch(0);
1460 }
1461 
1462 static int
1463 sccncheckc(dev_t dev)
1464 {
1465     return sccngetch(SCGETC_NONBLOCK);
1466 }
1467 
1468 static void
1469 sccndbctl(dev_t dev, int on)
1470 {
1471     /* assert(sc_console_unit >= 0) */
1472     /* try to switch to the kernel console screen */
1473     if (on && debugger == 0) {
1474 	/*
1475 	 * TRY to make sure the screen saver is stopped,
1476 	 * and the screen is updated before switching to
1477 	 * the vty0.
1478 	 */
1479 	scrn_timer(NULL);
1480 	if (!cold
1481 	    && sc_console->sc->cur_scp->smode.mode == VT_AUTO
1482 	    && sc_console->smode.mode == VT_AUTO) {
1483 	    sc_console->sc->cur_scp->status |= MOUSE_HIDDEN;
1484 	    sc_switch_scr(sc_console->sc, sc_console->index);
1485 	}
1486     }
1487     if (on)
1488 	++debugger;
1489     else
1490 	--debugger;
1491 }
1492 
1493 static int
1494 sccngetch(int flags)
1495 {
1496     static struct fkeytab fkey;
1497     static int fkeycp;
1498     scr_stat *scp;
1499     u_char *p;
1500     int cur_mode;
1501     int s = spltty();	/* block sckbdevent and scrn_timer while we poll */
1502     int c;
1503 
1504     /* assert(sc_console != NULL) */
1505 
1506     /*
1507      * Stop the screen saver and update the screen if necessary.
1508      * What if we have been running in the screen saver code... XXX
1509      */
1510     sc_touch_scrn_saver();
1511     scp = sc_console->sc->cur_scp;	/* XXX */
1512     sccnupdate(scp);
1513 
1514     if (fkeycp < fkey.len) {
1515 	splx(s);
1516 	return fkey.str[fkeycp++];
1517     }
1518 
1519     if (scp->sc->kbd == NULL) {
1520 	splx(s);
1521 	return -1;
1522     }
1523 
1524     /*
1525      * Make sure the keyboard is accessible even when the kbd device
1526      * driver is disabled.
1527      */
1528     kbd_enable(scp->sc->kbd);
1529 
1530     /* we shall always use the keyboard in the XLATE mode here */
1531     cur_mode = scp->kbd_mode;
1532     scp->kbd_mode = K_XLATE;
1533     kbd_ioctl(scp->sc->kbd, KDSKBMODE, (caddr_t)&scp->kbd_mode);
1534 
1535     kbd_poll(scp->sc->kbd, TRUE);
1536     c = scgetc(scp->sc, SCGETC_CN | flags);
1537     kbd_poll(scp->sc->kbd, FALSE);
1538 
1539     scp->kbd_mode = cur_mode;
1540     kbd_ioctl(scp->sc->kbd, KDSKBMODE, (caddr_t)&scp->kbd_mode);
1541     kbd_disable(scp->sc->kbd);
1542     splx(s);
1543 
1544     switch (KEYFLAGS(c)) {
1545     case 0:	/* normal char */
1546 	return KEYCHAR(c);
1547     case FKEY:	/* function key */
1548 	p = kbd_get_fkeystr(scp->sc->kbd, KEYCHAR(c), (size_t *)&fkeycp);
1549 	fkey.len = fkeycp;
1550 	if ((p != NULL) && (fkey.len > 0)) {
1551 	    bcopy(p, fkey.str, fkey.len);
1552 	    fkeycp = 1;
1553 	    return fkey.str[0];
1554 	}
1555 	return c;	/* XXX */
1556     case NOKEY:
1557     case ERRKEY:
1558     default:
1559 	return -1;
1560     }
1561     /* NOT REACHED */
1562 }
1563 
1564 static void
1565 sccnupdate(scr_stat *scp)
1566 {
1567     /* this is a cut-down version of scrn_timer()... */
1568 
1569     if (scp->sc->font_loading_in_progress || scp->sc->videoio_in_progress)
1570 	return;
1571 
1572     if (debugger > 0 || panicstr || shutdown_in_progress) {
1573 	sc_touch_scrn_saver();
1574     } else if (scp != scp->sc->cur_scp) {
1575 	return;
1576     }
1577 
1578     if (!run_scrn_saver)
1579 	scp->sc->flags &= ~SC_SCRN_IDLE;
1580 #ifdef DEV_SPLASH
1581     if ((saver_mode != CONS_LKM_SAVER) || !(scp->sc->flags & SC_SCRN_IDLE))
1582 	if (scp->sc->flags & SC_SCRN_BLANKED)
1583             stop_scrn_saver(scp->sc, current_saver);
1584 #endif
1585 
1586     if (scp != scp->sc->cur_scp || scp->sc->blink_in_progress
1587 	|| scp->sc->switch_in_progress)
1588 	return;
1589     /*
1590      * FIXME: unlike scrn_timer(), we call scrn_update() from here even
1591      * when write_in_progress is non-zero.  XXX
1592      */
1593 
1594     if (!ISGRAPHSC(scp) && !(scp->sc->flags & SC_SCRN_BLANKED))
1595 	scrn_update(scp, TRUE);
1596 }
1597 
1598 static void
1599 scrn_timer(void *arg)
1600 {
1601     static int kbd_interval = 0;
1602     struct timeval tv;
1603     sc_softc_t *sc;
1604     scr_stat *scp;
1605     int again;
1606     int s;
1607 
1608     again = (arg != NULL);
1609     if (arg != NULL)
1610 	sc = (sc_softc_t *)arg;
1611     else if (sc_console != NULL)
1612 	sc = sc_console->sc;
1613     else
1614 	return;
1615 
1616     /* don't do anything when we are performing some I/O operations */
1617     if (sc->font_loading_in_progress || sc->videoio_in_progress) {
1618 	if (again)
1619 	    timeout(scrn_timer, sc, hz / 10);
1620 	return;
1621     }
1622     s = spltty();
1623 
1624     if ((sc->kbd == NULL) && (sc->config & SC_AUTODETECT_KBD)) {
1625 	/* try to allocate a keyboard automatically */
1626 	if (++kbd_interval >= 25) {
1627 	    sc->keyboard = kbd_allocate("*", -1, (void *)&sc->keyboard,
1628 					sckbdevent, sc);
1629 	    if (sc->keyboard >= 0) {
1630 		sc->kbd = kbd_get_keyboard(sc->keyboard);
1631 		kbd_ioctl(sc->kbd, KDSKBMODE,
1632 			  (caddr_t)&sc->cur_scp->kbd_mode);
1633 		update_kbd_state(sc->cur_scp, sc->cur_scp->status,
1634 				 LOCK_MASK);
1635 	    }
1636 	    kbd_interval = 0;
1637 	}
1638     }
1639 
1640     /* find the vty to update */
1641     scp = sc->cur_scp;
1642 
1643     /* should we stop the screen saver? */
1644     getmicrouptime(&tv);
1645     if (debugger > 0 || panicstr || shutdown_in_progress)
1646 	sc_touch_scrn_saver();
1647     if (run_scrn_saver) {
1648 	if (tv.tv_sec > sc->scrn_time_stamp + scrn_blank_time)
1649 	    sc->flags |= SC_SCRN_IDLE;
1650 	else
1651 	    sc->flags &= ~SC_SCRN_IDLE;
1652     } else {
1653 	sc->scrn_time_stamp = tv.tv_sec;
1654 	sc->flags &= ~SC_SCRN_IDLE;
1655 	if (scrn_blank_time > 0)
1656 	    run_scrn_saver = TRUE;
1657     }
1658 #ifdef DEV_SPLASH
1659     if ((saver_mode != CONS_LKM_SAVER) || !(sc->flags & SC_SCRN_IDLE))
1660 	if (sc->flags & SC_SCRN_BLANKED)
1661             stop_scrn_saver(sc, current_saver);
1662 #endif
1663 
1664     /* should we just return ? */
1665     if (sc->blink_in_progress || sc->switch_in_progress
1666 	|| sc->write_in_progress) {
1667 	if (again)
1668 	    timeout(scrn_timer, sc, hz / 10);
1669 	splx(s);
1670 	return;
1671     }
1672 
1673     /* Update the screen */
1674     scp = sc->cur_scp;		/* cur_scp may have changed... */
1675     if (!ISGRAPHSC(scp) && !(sc->flags & SC_SCRN_BLANKED))
1676 	scrn_update(scp, TRUE);
1677 
1678 #ifdef DEV_SPLASH
1679     /* should we activate the screen saver? */
1680     if ((saver_mode == CONS_LKM_SAVER) && (sc->flags & SC_SCRN_IDLE))
1681 	if (!ISGRAPHSC(scp) || (sc->flags & SC_SCRN_BLANKED))
1682 	    (*current_saver)(sc, TRUE);
1683 #endif
1684 
1685     if (again)
1686 	timeout(scrn_timer, sc, hz / 25);
1687     splx(s);
1688 }
1689 
1690 static int
1691 and_region(int *s1, int *e1, int s2, int e2)
1692 {
1693     if (*e1 < s2 || e2 < *s1)
1694 	return FALSE;
1695     *s1 = imax(*s1, s2);
1696     *e1 = imin(*e1, e2);
1697     return TRUE;
1698 }
1699 
1700 static void
1701 scrn_update(scr_stat *scp, int show_cursor)
1702 {
1703     int start;
1704     int end;
1705     int s;
1706     int e;
1707 
1708     /* assert(scp == scp->sc->cur_scp) */
1709 
1710     ++scp->sc->videoio_in_progress;
1711 
1712 #ifndef SC_NO_CUTPASTE
1713     /* remove the previous mouse pointer image if necessary */
1714     if (scp->status & MOUSE_VISIBLE) {
1715 	s = scp->mouse_pos;
1716 	e = scp->mouse_pos + scp->xsize + 1;
1717 	if ((scp->status & (MOUSE_MOVED | MOUSE_HIDDEN))
1718 	    || and_region(&s, &e, scp->start, scp->end)
1719 	    || ((scp->status & CURSOR_ENABLED) &&
1720 		(scp->cursor_pos != scp->cursor_oldpos) &&
1721 		(and_region(&s, &e, scp->cursor_pos, scp->cursor_pos)
1722 		 || and_region(&s, &e, scp->cursor_oldpos, scp->cursor_oldpos)))) {
1723 	    sc_remove_mouse_image(scp);
1724 	    if (scp->end >= scp->xsize*scp->ysize)
1725 		scp->end = scp->xsize*scp->ysize - 1;
1726 	}
1727     }
1728 #endif /* !SC_NO_CUTPASTE */
1729 
1730 #if 1
1731     /* debug: XXX */
1732     if (scp->end >= scp->xsize*scp->ysize) {
1733 	printf("scrn_update(): scp->end %d > size_of_screen!!\n", scp->end);
1734 	scp->end = scp->xsize*scp->ysize - 1;
1735     }
1736     if (scp->start < 0) {
1737 	printf("scrn_update(): scp->start %d < 0\n", scp->start);
1738 	scp->start = 0;
1739     }
1740 #endif
1741 
1742     /* update screen image */
1743     if (scp->start <= scp->end)  {
1744 	if (scp->mouse_cut_end >= 0) {
1745 	    /* there is a marked region for cut & paste */
1746 	    if (scp->mouse_cut_start <= scp->mouse_cut_end) {
1747 		start = scp->mouse_cut_start;
1748 		end = scp->mouse_cut_end;
1749 	    } else {
1750 		start = scp->mouse_cut_end;
1751 		end = scp->mouse_cut_start - 1;
1752 	    }
1753 	    s = start;
1754 	    e = end;
1755 	    /* does the cut-mark region overlap with the update region? */
1756 	    if (and_region(&s, &e, scp->start, scp->end)) {
1757 		(*scp->rndr->draw)(scp, s, e - s + 1, TRUE);
1758 		s = 0;
1759 		e = start - 1;
1760 		if (and_region(&s, &e, scp->start, scp->end))
1761 		    (*scp->rndr->draw)(scp, s, e - s + 1, FALSE);
1762 		s = end + 1;
1763 		e = scp->xsize*scp->ysize - 1;
1764 		if (and_region(&s, &e, scp->start, scp->end))
1765 		    (*scp->rndr->draw)(scp, s, e - s + 1, FALSE);
1766 	    } else {
1767 		(*scp->rndr->draw)(scp, scp->start,
1768 				   scp->end - scp->start + 1, FALSE);
1769 	    }
1770 	} else {
1771 	    (*scp->rndr->draw)(scp, scp->start,
1772 			       scp->end - scp->start + 1, FALSE);
1773 	}
1774     }
1775 
1776     /* we are not to show the cursor and the mouse pointer... */
1777     if (!show_cursor) {
1778         scp->end = 0;
1779         scp->start = scp->xsize*scp->ysize - 1;
1780 	--scp->sc->videoio_in_progress;
1781 	return;
1782     }
1783 
1784     /* update cursor image */
1785     if (scp->status & CURSOR_ENABLED) {
1786 	s = scp->start;
1787 	e = scp->end;
1788         /* did cursor move since last time ? */
1789         if (scp->cursor_pos != scp->cursor_oldpos) {
1790             /* do we need to remove old cursor image ? */
1791             if (!and_region(&s, &e, scp->cursor_oldpos, scp->cursor_oldpos))
1792                 sc_remove_cursor_image(scp);
1793             sc_draw_cursor_image(scp);
1794         } else {
1795             if (and_region(&s, &e, scp->cursor_pos, scp->cursor_pos))
1796 		/* cursor didn't move, but has been overwritten */
1797 		sc_draw_cursor_image(scp);
1798 	    else if (scp->curs_attr.flags & CONS_BLINK_CURSOR)
1799 		/* if it's a blinking cursor, update it */
1800 		(*scp->rndr->blink_cursor)(scp, scp->cursor_pos,
1801 					   sc_inside_cutmark(scp,
1802 					       scp->cursor_pos));
1803         }
1804     }
1805 
1806 #ifndef SC_NO_CUTPASTE
1807     /* update "pseudo" mouse pointer image */
1808     if (scp->sc->flags & SC_MOUSE_ENABLED) {
1809 	if (!(scp->status & (MOUSE_VISIBLE | MOUSE_HIDDEN))) {
1810 	    scp->status &= ~MOUSE_MOVED;
1811 	    sc_draw_mouse_image(scp);
1812 	}
1813     }
1814 #endif /* SC_NO_CUTPASTE */
1815 
1816     scp->end = 0;
1817     scp->start = scp->xsize*scp->ysize - 1;
1818 
1819     --scp->sc->videoio_in_progress;
1820 }
1821 
1822 #ifdef DEV_SPLASH
1823 static int
1824 scsplash_callback(int event, void *arg)
1825 {
1826     sc_softc_t *sc;
1827     int error;
1828 
1829     sc = (sc_softc_t *)arg;
1830 
1831     switch (event) {
1832     case SPLASH_INIT:
1833 	if (add_scrn_saver(scsplash_saver) == 0) {
1834 	    sc->flags &= ~SC_SAVER_FAILED;
1835 	    run_scrn_saver = TRUE;
1836 	    if (cold && !(boothowto & (RB_VERBOSE | RB_CONFIG))) {
1837 		scsplash_stick(TRUE);
1838 		(*current_saver)(sc, TRUE);
1839 	    }
1840 	}
1841 	return 0;
1842 
1843     case SPLASH_TERM:
1844 	if (current_saver == scsplash_saver) {
1845 	    scsplash_stick(FALSE);
1846 	    error = remove_scrn_saver(scsplash_saver);
1847 	    if (error)
1848 		return error;
1849 	}
1850 	return 0;
1851 
1852     default:
1853 	return EINVAL;
1854     }
1855 }
1856 
1857 static void
1858 scsplash_saver(sc_softc_t *sc, int show)
1859 {
1860     static int busy = FALSE;
1861     scr_stat *scp;
1862 
1863     if (busy)
1864 	return;
1865     busy = TRUE;
1866 
1867     scp = sc->cur_scp;
1868     if (show) {
1869 	if (!(sc->flags & SC_SAVER_FAILED)) {
1870 	    if (!(sc->flags & SC_SCRN_BLANKED))
1871 		set_scrn_saver_mode(scp, -1, NULL, 0);
1872 	    switch (splash(sc->adp, TRUE)) {
1873 	    case 0:		/* succeeded */
1874 		break;
1875 	    case EAGAIN:	/* try later */
1876 		restore_scrn_saver_mode(scp, FALSE);
1877 		sc_touch_scrn_saver();		/* XXX */
1878 		break;
1879 	    default:
1880 		sc->flags |= SC_SAVER_FAILED;
1881 		scsplash_stick(FALSE);
1882 		restore_scrn_saver_mode(scp, TRUE);
1883 		printf("scsplash_saver(): failed to put up the image\n");
1884 		break;
1885 	    }
1886 	}
1887     } else if (!sticky_splash) {
1888 	if ((sc->flags & SC_SCRN_BLANKED) && (splash(sc->adp, FALSE) == 0))
1889 	    restore_scrn_saver_mode(scp, TRUE);
1890     }
1891     busy = FALSE;
1892 }
1893 
1894 static int
1895 add_scrn_saver(void (*this_saver)(sc_softc_t *, int))
1896 {
1897 #if 0
1898     int error;
1899 
1900     if (current_saver != none_saver) {
1901 	error = remove_scrn_saver(current_saver);
1902 	if (error)
1903 	    return error;
1904     }
1905 #endif
1906     if (current_saver != none_saver)
1907 	return EBUSY;
1908 
1909     run_scrn_saver = FALSE;
1910     saver_mode = CONS_LKM_SAVER;
1911     current_saver = this_saver;
1912     return 0;
1913 }
1914 
1915 static int
1916 remove_scrn_saver(void (*this_saver)(sc_softc_t *, int))
1917 {
1918     if (current_saver != this_saver)
1919 	return EINVAL;
1920 
1921 #if 0
1922     /*
1923      * In order to prevent `current_saver' from being called by
1924      * the timeout routine `scrn_timer()' while we manipulate
1925      * the saver list, we shall set `current_saver' to `none_saver'
1926      * before stopping the current saver, rather than blocking by `splXX()'.
1927      */
1928     current_saver = none_saver;
1929     if (scrn_blanked)
1930         stop_scrn_saver(this_saver);
1931 #endif
1932 
1933     /* unblank all blanked screens */
1934     wait_scrn_saver_stop(NULL);
1935     if (scrn_blanked)
1936 	return EBUSY;
1937 
1938     current_saver = none_saver;
1939     return 0;
1940 }
1941 
1942 static int
1943 set_scrn_saver_mode(scr_stat *scp, int mode, u_char *pal, int border)
1944 {
1945     int s;
1946 
1947     /* assert(scp == scp->sc->cur_scp) */
1948     s = spltty();
1949     if (!ISGRAPHSC(scp))
1950 	sc_remove_cursor_image(scp);
1951     scp->splash_save_mode = scp->mode;
1952     scp->splash_save_status = scp->status & (GRAPHICS_MODE | PIXEL_MODE);
1953     scp->status &= ~(GRAPHICS_MODE | PIXEL_MODE);
1954     scp->status |= (UNKNOWN_MODE | SAVER_RUNNING);
1955     scp->sc->flags |= SC_SCRN_BLANKED;
1956     ++scrn_blanked;
1957     splx(s);
1958     if (mode < 0)
1959 	return 0;
1960     scp->mode = mode;
1961     if (set_mode(scp) == 0) {
1962 	if (scp->sc->adp->va_info.vi_flags & V_INFO_GRAPHICS)
1963 	    scp->status |= GRAPHICS_MODE;
1964 #ifndef SC_NO_PALETTE_LOADING
1965 	if (pal != NULL)
1966 	    load_palette(scp->sc->adp, pal);
1967 #endif
1968 	sc_set_border(scp, border);
1969 	return 0;
1970     } else {
1971 	s = spltty();
1972 	scp->mode = scp->splash_save_mode;
1973 	scp->status &= ~(UNKNOWN_MODE | SAVER_RUNNING);
1974 	scp->status |= scp->splash_save_status;
1975 	splx(s);
1976 	return 1;
1977     }
1978 }
1979 
1980 static int
1981 restore_scrn_saver_mode(scr_stat *scp, int changemode)
1982 {
1983     int mode;
1984     int status;
1985     int s;
1986 
1987     /* assert(scp == scp->sc->cur_scp) */
1988     s = spltty();
1989     mode = scp->mode;
1990     status = scp->status;
1991     scp->mode = scp->splash_save_mode;
1992     scp->status &= ~(UNKNOWN_MODE | SAVER_RUNNING);
1993     scp->status |= scp->splash_save_status;
1994     scp->sc->flags &= ~SC_SCRN_BLANKED;
1995     if (!changemode) {
1996 	if (!ISGRAPHSC(scp))
1997 	    sc_draw_cursor_image(scp);
1998 	--scrn_blanked;
1999 	splx(s);
2000 	return 0;
2001     }
2002     if (set_mode(scp) == 0) {
2003 #ifndef SC_NO_PALETTE_LOADING
2004 	load_palette(scp->sc->adp, scp->sc->palette);
2005 #endif
2006 	--scrn_blanked;
2007 	splx(s);
2008 	return 0;
2009     } else {
2010 	scp->mode = mode;
2011 	scp->status = status;
2012 	splx(s);
2013 	return 1;
2014     }
2015 }
2016 
2017 static void
2018 stop_scrn_saver(sc_softc_t *sc, void (*saver)(sc_softc_t *, int))
2019 {
2020     (*saver)(sc, FALSE);
2021     run_scrn_saver = FALSE;
2022     /* the screen saver may have chosen not to stop after all... */
2023     if (sc->flags & SC_SCRN_BLANKED)
2024 	return;
2025 
2026     mark_all(sc->cur_scp);
2027     if (sc->delayed_next_scr)
2028 	sc_switch_scr(sc, sc->delayed_next_scr - 1);
2029     wakeup((caddr_t)&scrn_blanked);
2030 }
2031 
2032 static int
2033 wait_scrn_saver_stop(sc_softc_t *sc)
2034 {
2035     int error = 0;
2036 
2037     while (scrn_blanked > 0) {
2038 	run_scrn_saver = FALSE;
2039 	if (sc && !(sc->flags & SC_SCRN_BLANKED)) {
2040 	    error = 0;
2041 	    break;
2042 	}
2043 	error = tsleep((caddr_t)&scrn_blanked, PZERO | PCATCH, "scrsav", 0);
2044 	if ((error != 0) && (error != ERESTART))
2045 	    break;
2046     }
2047     run_scrn_saver = FALSE;
2048     return error;
2049 }
2050 #endif /* DEV_SPLASH */
2051 
2052 void
2053 sc_touch_scrn_saver(void)
2054 {
2055     scsplash_stick(FALSE);
2056     run_scrn_saver = FALSE;
2057 }
2058 
2059 int
2060 sc_switch_scr(sc_softc_t *sc, u_int next_scr)
2061 {
2062     scr_stat *cur_scp;
2063     struct tty *tp;
2064     struct proc *p;
2065     int s;
2066 
2067     DPRINTF(5, ("sc0: sc_switch_scr() %d ", next_scr + 1));
2068 
2069     /* delay switch if the screen is blanked or being updated */
2070     if ((sc->flags & SC_SCRN_BLANKED) || sc->write_in_progress
2071 	|| sc->blink_in_progress || sc->videoio_in_progress) {
2072 	sc->delayed_next_scr = next_scr + 1;
2073 	sc_touch_scrn_saver();
2074 	DPRINTF(5, ("switch delayed\n"));
2075 	return 0;
2076     }
2077 
2078     s = spltty();
2079     cur_scp = sc->cur_scp;
2080 
2081     /* we are in the middle of the vty switching process... */
2082     if (sc->switch_in_progress
2083 	&& (cur_scp->smode.mode == VT_PROCESS)
2084 	&& cur_scp->proc) {
2085 	p = pfind(cur_scp->pid);
2086 	if (cur_scp->proc != p) {
2087 	    if (p)
2088 		PROC_UNLOCK(p);
2089 	    /*
2090 	     * The controlling process has died!!.  Do some clean up.
2091 	     * NOTE:`cur_scp->proc' and `cur_scp->smode.mode'
2092 	     * are not reset here yet; they will be cleared later.
2093 	     */
2094 	    DPRINTF(5, ("cur_scp controlling process %d died, ",
2095 	       cur_scp->pid));
2096 	    if (cur_scp->status & SWITCH_WAIT_REL) {
2097 		/*
2098 		 * Force the previous switch to finish, but return now
2099 		 * with error.
2100 		 */
2101 		DPRINTF(5, ("reset WAIT_REL, "));
2102 		finish_vt_rel(cur_scp, TRUE, &s);
2103 		splx(s);
2104 		DPRINTF(5, ("finishing previous switch\n"));
2105 		return EINVAL;
2106 	    } else if (cur_scp->status & SWITCH_WAIT_ACQ) {
2107 		/* let's assume screen switch has been completed. */
2108 		DPRINTF(5, ("reset WAIT_ACQ, "));
2109 		finish_vt_acq(cur_scp);
2110 	    } else {
2111 		/*
2112 	 	 * We are in between screen release and acquisition, and
2113 		 * reached here via scgetc() or scrn_timer() which has
2114 		 * interrupted exchange_scr(). Don't do anything stupid.
2115 		 */
2116 		DPRINTF(5, ("waiting nothing, "));
2117 	    }
2118 	} else {
2119 	    if (p)
2120 		PROC_UNLOCK(p);
2121 	    /*
2122 	     * The controlling process is alive, but not responding...
2123 	     * It is either buggy or it may be just taking time.
2124 	     * The following code is a gross kludge to cope with this
2125 	     * problem for which there is no clean solution. XXX
2126 	     */
2127 	    if (cur_scp->status & SWITCH_WAIT_REL) {
2128 		switch (sc->switch_in_progress++) {
2129 		case 1:
2130 		    break;
2131 		case 2:
2132 		    DPRINTF(5, ("sending relsig again, "));
2133 		    signal_vt_rel(cur_scp);
2134 		    break;
2135 		case 3:
2136 		    break;
2137 		case 4:
2138 		default:
2139 		    /*
2140 		     * Act as if the controlling program returned
2141 		     * VT_FALSE.
2142 		     */
2143 		    DPRINTF(5, ("force reset WAIT_REL, "));
2144 		    finish_vt_rel(cur_scp, FALSE, &s);
2145 		    splx(s);
2146 		    DPRINTF(5, ("act as if VT_FALSE was seen\n"));
2147 		    return EINVAL;
2148 		}
2149 	    } else if (cur_scp->status & SWITCH_WAIT_ACQ) {
2150 		switch (sc->switch_in_progress++) {
2151 		case 1:
2152 		    break;
2153 		case 2:
2154 		    DPRINTF(5, ("sending acqsig again, "));
2155 		    signal_vt_acq(cur_scp);
2156 		    break;
2157 		case 3:
2158 		    break;
2159 		case 4:
2160 		default:
2161 		     /* clear the flag and finish the previous switch */
2162 		    DPRINTF(5, ("force reset WAIT_ACQ, "));
2163 		    finish_vt_acq(cur_scp);
2164 		    break;
2165 		}
2166 	    }
2167 	}
2168     }
2169 
2170     /*
2171      * Return error if an invalid argument is given, or vty switch
2172      * is still in progress.
2173      */
2174     if ((next_scr < sc->first_vty) || (next_scr >= sc->first_vty + sc->vtys)
2175 	|| sc->switch_in_progress) {
2176 	splx(s);
2177 	sc_bell(cur_scp, bios_value.bell_pitch, BELL_DURATION);
2178 	DPRINTF(5, ("error 1\n"));
2179 	return EINVAL;
2180     }
2181 
2182     /*
2183      * Don't allow switching away from the graphics mode vty
2184      * if the switch mode is VT_AUTO, unless the next vty is the same
2185      * as the current or the current vty has been closed (but showing).
2186      */
2187     tp = VIRTUAL_TTY(sc, cur_scp->index);
2188     if ((cur_scp->index != next_scr)
2189 	&& ISTTYOPEN(tp)
2190 	&& (cur_scp->smode.mode == VT_AUTO)
2191 	&& ISGRAPHSC(cur_scp)) {
2192 	splx(s);
2193 	sc_bell(cur_scp, bios_value.bell_pitch, BELL_DURATION);
2194 	DPRINTF(5, ("error, graphics mode\n"));
2195 	return EINVAL;
2196     }
2197 
2198     /*
2199      * Is the wanted vty open? Don't allow switching to a closed vty.
2200      * If we are in DDB, don't switch to a vty in the VT_PROCESS mode.
2201      * Note that we always allow the user to switch to the kernel
2202      * console even if it is closed.
2203      */
2204     if ((sc_console == NULL) || (next_scr != sc_console->index)) {
2205 	tp = VIRTUAL_TTY(sc, next_scr);
2206 	if (!ISTTYOPEN(tp)) {
2207 	    splx(s);
2208 	    sc_bell(cur_scp, bios_value.bell_pitch, BELL_DURATION);
2209 	    DPRINTF(5, ("error 2, requested vty isn't open!\n"));
2210 	    return EINVAL;
2211 	}
2212 	if ((debugger > 0) && (SC_STAT(tp->t_dev)->smode.mode == VT_PROCESS)) {
2213 	    splx(s);
2214 	    DPRINTF(5, ("error 3, requested vty is in the VT_PROCESS mode\n"));
2215 	    return EINVAL;
2216 	}
2217     }
2218 
2219     /* this is the start of vty switching process... */
2220     ++sc->switch_in_progress;
2221     sc->delayed_next_scr = 0;
2222     sc->old_scp = cur_scp;
2223     sc->new_scp = SC_STAT(SC_DEV(sc, next_scr));
2224     if (sc->new_scp == sc->old_scp) {
2225 	sc->switch_in_progress = 0;
2226 	wakeup((caddr_t)&sc->new_scp->smode);
2227 	splx(s);
2228 	DPRINTF(5, ("switch done (new == old)\n"));
2229 	return 0;
2230     }
2231 
2232     /* has controlling process died? */
2233     vt_proc_alive(sc->old_scp);
2234     vt_proc_alive(sc->new_scp);
2235 
2236     /* wait for the controlling process to release the screen, if necessary */
2237     if (signal_vt_rel(sc->old_scp)) {
2238 	splx(s);
2239 	return 0;
2240     }
2241 
2242     /* go set up the new vty screen */
2243     splx(s);
2244     exchange_scr(sc);
2245     s = spltty();
2246 
2247     /* wake up processes waiting for this vty */
2248     wakeup((caddr_t)&sc->cur_scp->smode);
2249 
2250     /* wait for the controlling process to acknowledge, if necessary */
2251     if (signal_vt_acq(sc->cur_scp)) {
2252 	splx(s);
2253 	return 0;
2254     }
2255 
2256     sc->switch_in_progress = 0;
2257     if (sc->unit == sc_console_unit)
2258 	cons_unavail = FALSE;
2259     splx(s);
2260     DPRINTF(5, ("switch done\n"));
2261 
2262     return 0;
2263 }
2264 
2265 static int
2266 do_switch_scr(sc_softc_t *sc, int s)
2267 {
2268     vt_proc_alive(sc->new_scp);
2269 
2270     splx(s);
2271     exchange_scr(sc);
2272     s = spltty();
2273     /* sc->cur_scp == sc->new_scp */
2274     wakeup((caddr_t)&sc->cur_scp->smode);
2275 
2276     /* wait for the controlling process to acknowledge, if necessary */
2277     if (!signal_vt_acq(sc->cur_scp)) {
2278 	sc->switch_in_progress = 0;
2279 	if (sc->unit == sc_console_unit)
2280 	    cons_unavail = FALSE;
2281     }
2282 
2283     return s;
2284 }
2285 
2286 static int
2287 vt_proc_alive(scr_stat *scp)
2288 {
2289     struct proc *p;
2290 
2291     if (scp->proc) {
2292 	if ((p = pfind(scp->pid)) != NULL)
2293 	    PROC_UNLOCK(p);
2294 	if (scp->proc == p)
2295 	    return TRUE;
2296 	scp->proc = NULL;
2297 	scp->smode.mode = VT_AUTO;
2298 	DPRINTF(5, ("vt controlling process %d died\n", scp->pid));
2299     }
2300     return FALSE;
2301 }
2302 
2303 static int
2304 signal_vt_rel(scr_stat *scp)
2305 {
2306     if (scp->smode.mode != VT_PROCESS)
2307 	return FALSE;
2308     scp->status |= SWITCH_WAIT_REL;
2309     PROC_LOCK(scp->proc);
2310     psignal(scp->proc, scp->smode.relsig);
2311     PROC_UNLOCK(scp->proc);
2312     DPRINTF(5, ("sending relsig to %d\n", scp->pid));
2313     return TRUE;
2314 }
2315 
2316 static int
2317 signal_vt_acq(scr_stat *scp)
2318 {
2319     if (scp->smode.mode != VT_PROCESS)
2320 	return FALSE;
2321     if (scp->sc->unit == sc_console_unit)
2322 	cons_unavail = TRUE;
2323     scp->status |= SWITCH_WAIT_ACQ;
2324     PROC_LOCK(scp->proc);
2325     psignal(scp->proc, scp->smode.acqsig);
2326     PROC_UNLOCK(scp->proc);
2327     DPRINTF(5, ("sending acqsig to %d\n", scp->pid));
2328     return TRUE;
2329 }
2330 
2331 static int
2332 finish_vt_rel(scr_stat *scp, int release, int *s)
2333 {
2334     if (scp == scp->sc->old_scp && scp->status & SWITCH_WAIT_REL) {
2335 	scp->status &= ~SWITCH_WAIT_REL;
2336 	if (release)
2337 	    *s = do_switch_scr(scp->sc, *s);
2338 	else
2339 	    scp->sc->switch_in_progress = 0;
2340 	return 0;
2341     }
2342     return EINVAL;
2343 }
2344 
2345 static int
2346 finish_vt_acq(scr_stat *scp)
2347 {
2348     if (scp == scp->sc->new_scp && scp->status & SWITCH_WAIT_ACQ) {
2349 	scp->status &= ~SWITCH_WAIT_ACQ;
2350 	scp->sc->switch_in_progress = 0;
2351 	return 0;
2352     }
2353     return EINVAL;
2354 }
2355 
2356 static void
2357 exchange_scr(sc_softc_t *sc)
2358 {
2359     scr_stat *scp;
2360 
2361     /* save the current state of video and keyboard */
2362     sc_move_cursor(sc->old_scp, sc->old_scp->xpos, sc->old_scp->ypos);
2363     if (!ISGRAPHSC(sc->old_scp))
2364 	sc_remove_cursor_image(sc->old_scp);
2365     if (sc->old_scp->kbd_mode == K_XLATE)
2366 	save_kbd_state(sc->old_scp);
2367 
2368     /* set up the video for the new screen */
2369     scp = sc->cur_scp = sc->new_scp;
2370     if (sc->old_scp->mode != scp->mode || ISUNKNOWNSC(sc->old_scp))
2371 	set_mode(scp);
2372     else
2373 	sc_vtb_init(&scp->scr, VTB_FRAMEBUFFER, scp->xsize, scp->ysize,
2374 		    (void *)sc->adp->va_window, FALSE);
2375     scp->status |= MOUSE_HIDDEN;
2376     sc_move_cursor(scp, scp->xpos, scp->ypos);
2377     if (!ISGRAPHSC(scp))
2378 	sc_set_cursor_image(scp);
2379 #ifndef SC_NO_PALETTE_LOADING
2380     if (ISGRAPHSC(sc->old_scp))
2381 	load_palette(sc->adp, sc->palette);
2382 #endif
2383     sc_set_border(scp, scp->border);
2384 
2385     /* set up the keyboard for the new screen */
2386     if (sc->old_scp->kbd_mode != scp->kbd_mode)
2387 	kbd_ioctl(sc->kbd, KDSKBMODE, (caddr_t)&scp->kbd_mode);
2388     update_kbd_state(scp, scp->status, LOCK_MASK);
2389 
2390     mark_all(scp);
2391 }
2392 
2393 void
2394 sc_puts(scr_stat *scp, u_char *buf, int len)
2395 {
2396 #ifdef DEV_SPLASH
2397     /* make screensaver happy */
2398     if (!sticky_splash && scp == scp->sc->cur_scp)
2399 	run_scrn_saver = FALSE;
2400 #endif
2401 
2402     if (scp->tsw)
2403 	(*scp->tsw->te_puts)(scp, buf, len);
2404 
2405     if (scp->sc->delayed_next_scr)
2406 	sc_switch_scr(scp->sc, scp->sc->delayed_next_scr - 1);
2407 }
2408 
2409 void
2410 sc_draw_cursor_image(scr_stat *scp)
2411 {
2412     /* assert(scp == scp->sc->cur_scp); */
2413     ++scp->sc->videoio_in_progress;
2414     (*scp->rndr->draw_cursor)(scp, scp->cursor_pos,
2415 			      scp->curs_attr.flags & CONS_BLINK_CURSOR, TRUE,
2416 			      sc_inside_cutmark(scp, scp->cursor_pos));
2417     scp->cursor_oldpos = scp->cursor_pos;
2418     --scp->sc->videoio_in_progress;
2419 }
2420 
2421 void
2422 sc_remove_cursor_image(scr_stat *scp)
2423 {
2424     /* assert(scp == scp->sc->cur_scp); */
2425     ++scp->sc->videoio_in_progress;
2426     (*scp->rndr->draw_cursor)(scp, scp->cursor_oldpos,
2427 			      scp->curs_attr.flags & CONS_BLINK_CURSOR, FALSE,
2428 			      sc_inside_cutmark(scp, scp->cursor_oldpos));
2429     --scp->sc->videoio_in_progress;
2430 }
2431 
2432 static void
2433 update_cursor_image(scr_stat *scp)
2434 {
2435     /* assert(scp == scp->sc->cur_scp); */
2436     sc_remove_cursor_image(scp);
2437     sc_set_cursor_image(scp);
2438     sc_draw_cursor_image(scp);
2439 }
2440 
2441 void
2442 sc_set_cursor_image(scr_stat *scp)
2443 {
2444     scp->curs_attr.flags = scp->curr_curs_attr.flags;
2445     if (scp->curs_attr.flags & CONS_HIDDEN_CURSOR) {
2446 	/* hidden cursor is internally represented as zero-height underline */
2447 	scp->curs_attr.flags = CONS_CHAR_CURSOR;
2448 	scp->curs_attr.base = scp->curs_attr.height = 0;
2449     } else if (scp->curs_attr.flags & CONS_CHAR_CURSOR) {
2450 	scp->curs_attr.base = imin(scp->curr_curs_attr.base,
2451 				  scp->font_size - 1);
2452 	scp->curs_attr.height = imin(scp->curr_curs_attr.height,
2453 				    scp->font_size - scp->curs_attr.base);
2454     } else {	/* block cursor */
2455 	scp->curs_attr.base = 0;
2456 	scp->curs_attr.height = scp->font_size;
2457     }
2458 
2459     /* assert(scp == scp->sc->cur_scp); */
2460     ++scp->sc->videoio_in_progress;
2461     (*scp->rndr->set_cursor)(scp, scp->curs_attr.base, scp->curs_attr.height,
2462 			     scp->curs_attr.flags & CONS_BLINK_CURSOR);
2463     --scp->sc->videoio_in_progress;
2464 }
2465 
2466 static void
2467 change_cursor_shape(scr_stat *scp, int flags, int base, int height)
2468 {
2469     if ((scp == scp->sc->cur_scp) && !ISGRAPHSC(scp))
2470 	sc_remove_cursor_image(scp);
2471 
2472     if (base >= 0)
2473 	scp->curr_curs_attr.base = base;
2474     if (height >= 0)
2475 	scp->curr_curs_attr.height = height;
2476     if (flags & CONS_RESET_CURSOR)
2477 	scp->curr_curs_attr = scp->dflt_curs_attr;
2478     else
2479 	scp->curr_curs_attr.flags = flags & CONS_CURSOR_ATTRS;
2480 
2481     if ((scp == scp->sc->cur_scp) && !ISGRAPHSC(scp)) {
2482 	sc_set_cursor_image(scp);
2483 	sc_draw_cursor_image(scp);
2484     }
2485 }
2486 
2487 void
2488 sc_change_cursor_shape(scr_stat *scp, int flags, int base, int height)
2489 {
2490     sc_softc_t *sc;
2491     dev_t dev;
2492     int s;
2493     int i;
2494 
2495     s = spltty();
2496     if ((flags != -1) && (flags & CONS_LOCAL_CURSOR)) {
2497 	/* local (per vty) change */
2498 	change_cursor_shape(scp, flags, base, height);
2499 	splx(s);
2500 	return;
2501     }
2502 
2503     /* global change */
2504     sc = scp->sc;
2505     if (base >= 0)
2506 	sc->curs_attr.base = base;
2507     if (height >= 0)
2508 	sc->curs_attr.height = height;
2509     if (flags != -1) {
2510 	if (flags & CONS_RESET_CURSOR)
2511 	    sc->curs_attr = sc->dflt_curs_attr;
2512 	else
2513 	    sc->curs_attr.flags = flags & CONS_CURSOR_ATTRS;
2514     }
2515 
2516     for (i = sc->first_vty; i < sc->first_vty + sc->vtys; ++i) {
2517 	if ((dev = SC_DEV(sc, i)) == NODEV)
2518 	    continue;
2519 	if ((scp = SC_STAT(dev)) == NULL)
2520 	    continue;
2521 	scp->dflt_curs_attr = sc->curs_attr;
2522 	change_cursor_shape(scp, CONS_RESET_CURSOR, -1, -1);
2523     }
2524     splx(s);
2525 }
2526 
2527 static void
2528 scinit(int unit, int flags)
2529 {
2530     /*
2531      * When syscons is being initialized as the kernel console, malloc()
2532      * is not yet functional, because various kernel structures has not been
2533      * fully initialized yet.  Therefore, we need to declare the following
2534      * static buffers for the console.  This is less than ideal,
2535      * but is necessry evil for the time being.  XXX
2536      */
2537     static scr_stat main_console;
2538     static dev_t main_devs[MAXCONS];
2539     static struct tty main_tty;
2540     static u_short sc_buffer[ROW*COL];	/* XXX */
2541 #ifndef SC_NO_FONT_LOADING
2542     static u_char font_8[256*8];
2543     static u_char font_14[256*14];
2544     static u_char font_16[256*16];
2545 #endif
2546 
2547     sc_softc_t *sc;
2548     scr_stat *scp;
2549     video_adapter_t *adp;
2550     int col;
2551     int row;
2552     int i;
2553 
2554     /* one time initialization */
2555     if (init_done == COLD)
2556 	sc_get_bios_values(&bios_value);
2557     init_done = WARM;
2558 
2559     /*
2560      * Allocate resources.  Even if we are being called for the second
2561      * time, we must allocate them again, because they might have
2562      * disappeared...
2563      */
2564     sc = sc_get_softc(unit, flags & SC_KERNEL_CONSOLE);
2565     adp = NULL;
2566     if (sc->adapter >= 0) {
2567 	vid_release(sc->adp, (void *)&sc->adapter);
2568 	adp = sc->adp;
2569 	sc->adp = NULL;
2570     }
2571     if (sc->keyboard >= 0) {
2572 	DPRINTF(5, ("sc%d: releasing kbd%d\n", unit, sc->keyboard));
2573 	i = kbd_release(sc->kbd, (void *)&sc->keyboard);
2574 	DPRINTF(5, ("sc%d: kbd_release returned %d\n", unit, i));
2575 	if (sc->kbd != NULL) {
2576 	    DPRINTF(5, ("sc%d: kbd != NULL!, index:%d, unit:%d, flags:0x%x\n",
2577 		unit, sc->kbd->kb_index, sc->kbd->kb_unit, sc->kbd->kb_flags));
2578 	}
2579 	sc->kbd = NULL;
2580     }
2581     sc->adapter = vid_allocate("*", unit, (void *)&sc->adapter);
2582     sc->adp = vid_get_adapter(sc->adapter);
2583     /* assert((sc->adapter >= 0) && (sc->adp != NULL)) */
2584     sc->keyboard = kbd_allocate("*", unit, (void *)&sc->keyboard,
2585 				sckbdevent, sc);
2586     DPRINTF(1, ("sc%d: keyboard %d\n", unit, sc->keyboard));
2587     sc->kbd = kbd_get_keyboard(sc->keyboard);
2588     if (sc->kbd != NULL) {
2589 	DPRINTF(1, ("sc%d: kbd index:%d, unit:%d, flags:0x%x\n",
2590 		unit, sc->kbd->kb_index, sc->kbd->kb_unit, sc->kbd->kb_flags));
2591     }
2592 
2593     if (!(sc->flags & SC_INIT_DONE) || (adp != sc->adp)) {
2594 
2595 	sc->initial_mode = sc->adp->va_initial_mode;
2596 
2597 #ifndef SC_NO_FONT_LOADING
2598 	if (flags & SC_KERNEL_CONSOLE) {
2599 	    sc->font_8 = font_8;
2600 	    sc->font_14 = font_14;
2601 	    sc->font_16 = font_16;
2602 	} else if (sc->font_8 == NULL) {
2603 	    /* assert(sc_malloc) */
2604 	    sc->font_8 = malloc(sizeof(font_8), M_DEVBUF, M_WAITOK);
2605 	    sc->font_14 = malloc(sizeof(font_14), M_DEVBUF, M_WAITOK);
2606 	    sc->font_16 = malloc(sizeof(font_16), M_DEVBUF, M_WAITOK);
2607 	}
2608 #endif
2609 
2610 	/* extract the hardware cursor location and hide the cursor for now */
2611 	(*vidsw[sc->adapter]->read_hw_cursor)(sc->adp, &col, &row);
2612 	(*vidsw[sc->adapter]->set_hw_cursor)(sc->adp, -1, -1);
2613 
2614 	/* set up the first console */
2615 	sc->first_vty = unit*MAXCONS;
2616 	sc->vtys = MAXCONS;		/* XXX: should be configurable */
2617 	if (flags & SC_KERNEL_CONSOLE) {
2618 	    sc->dev = main_devs;
2619 	    sc->dev[0] = makedev(CDEV_MAJOR, unit*MAXCONS);
2620 	    sc->dev[0]->si_tty = &main_tty;
2621 	    ttyregister(&main_tty);
2622 	    scp = &main_console;
2623 	    init_scp(sc, sc->first_vty, scp);
2624 	    sc_vtb_init(&scp->vtb, VTB_MEMORY, scp->xsize, scp->ysize,
2625 			(void *)sc_buffer, FALSE);
2626 	    if (sc_init_emulator(scp, SC_DFLT_TERM))
2627 		sc_init_emulator(scp, "*");
2628 	    (*scp->tsw->te_default_attr)(scp,
2629 					 kernel_default.std_color,
2630 					 kernel_default.rev_color);
2631 	} else {
2632 	    /* assert(sc_malloc) */
2633 	    sc->dev = malloc(sizeof(dev_t)*sc->vtys, M_DEVBUF, M_WAITOK|M_ZERO);
2634 	    sc->dev[0] = makedev(CDEV_MAJOR, unit*MAXCONS);
2635 	    sc->dev[0]->si_tty = ttymalloc(sc->dev[0]->si_tty);
2636 	    scp = alloc_scp(sc, sc->first_vty);
2637 	}
2638 	SC_STAT(sc->dev[0]) = scp;
2639 	sc->cur_scp = scp;
2640 
2641 	/* copy screen to temporary buffer */
2642 	sc_vtb_init(&scp->scr, VTB_FRAMEBUFFER, scp->xsize, scp->ysize,
2643 		    (void *)scp->sc->adp->va_window, FALSE);
2644 	if (ISTEXTSC(scp))
2645 	    sc_vtb_copy(&scp->scr, 0, &scp->vtb, 0, scp->xsize*scp->ysize);
2646 
2647 	/* move cursors to the initial positions */
2648 	if (col >= scp->xsize)
2649 	    col = 0;
2650 	if (row >= scp->ysize)
2651 	    row = scp->ysize - 1;
2652 	scp->xpos = col;
2653 	scp->ypos = row;
2654 	scp->cursor_pos = scp->cursor_oldpos = row*scp->xsize + col;
2655 
2656 	if (bios_value.cursor_end < scp->font_size)
2657 	    sc->dflt_curs_attr.base = scp->font_size -
2658 					  bios_value.cursor_end - 1;
2659 	else
2660 	    sc->dflt_curs_attr.base = 0;
2661 	i = bios_value.cursor_end - bios_value.cursor_start + 1;
2662 	sc->dflt_curs_attr.height = imin(i, scp->font_size);
2663 	sc->dflt_curs_attr.flags = 0;
2664 	sc->curs_attr = sc->dflt_curs_attr;
2665 	scp->curr_curs_attr = scp->dflt_curs_attr = sc->curs_attr;
2666 
2667 #ifndef SC_NO_SYSMOUSE
2668 	sc_mouse_move(scp, scp->xpixel/2, scp->ypixel/2);
2669 #endif
2670 	if (!ISGRAPHSC(scp)) {
2671     	    sc_set_cursor_image(scp);
2672     	    sc_draw_cursor_image(scp);
2673 	}
2674 
2675 	/* save font and palette */
2676 #ifndef SC_NO_FONT_LOADING
2677 	sc->fonts_loaded = 0;
2678 	if (ISFONTAVAIL(sc->adp->va_flags)) {
2679 #ifdef SC_DFLT_FONT
2680 	    bcopy(dflt_font_8, sc->font_8, sizeof(dflt_font_8));
2681 	    bcopy(dflt_font_14, sc->font_14, sizeof(dflt_font_14));
2682 	    bcopy(dflt_font_16, sc->font_16, sizeof(dflt_font_16));
2683 	    sc->fonts_loaded = FONT_16 | FONT_14 | FONT_8;
2684 	    if (scp->font_size < 14) {
2685 		sc_load_font(scp, 0, 8, sc->font_8, 0, 256);
2686 	    } else if (scp->font_size >= 16) {
2687 		sc_load_font(scp, 0, 16, sc->font_16, 0, 256);
2688 	    } else {
2689 		sc_load_font(scp, 0, 14, sc->font_14, 0, 256);
2690 	    }
2691 #else /* !SC_DFLT_FONT */
2692 	    if (scp->font_size < 14) {
2693 		sc_save_font(scp, 0, 8, sc->font_8, 0, 256);
2694 		sc->fonts_loaded = FONT_8;
2695 	    } else if (scp->font_size >= 16) {
2696 		sc_save_font(scp, 0, 16, sc->font_16, 0, 256);
2697 		sc->fonts_loaded = FONT_16;
2698 	    } else {
2699 		sc_save_font(scp, 0, 14, sc->font_14, 0, 256);
2700 		sc->fonts_loaded = FONT_14;
2701 	    }
2702 #endif /* SC_DFLT_FONT */
2703 	    /* FONT KLUDGE: always use the font page #0. XXX */
2704 	    sc_show_font(scp, 0);
2705 	}
2706 #endif /* !SC_NO_FONT_LOADING */
2707 
2708 #ifndef SC_NO_PALETTE_LOADING
2709 	save_palette(sc->adp, sc->palette);
2710 #endif
2711 
2712 #ifdef DEV_SPLASH
2713 	if (!(sc->flags & SC_SPLASH_SCRN) && (flags & SC_KERNEL_CONSOLE)) {
2714 	    /* we are ready to put up the splash image! */
2715 	    splash_init(sc->adp, scsplash_callback, sc);
2716 	    sc->flags |= SC_SPLASH_SCRN;
2717 	}
2718 #endif
2719     }
2720 
2721     /* the rest is not necessary, if we have done it once */
2722     if (sc->flags & SC_INIT_DONE)
2723 	return;
2724 
2725     /* initialize mapscrn arrays to a one to one map */
2726     for (i = 0; i < sizeof(sc->scr_map); i++)
2727 	sc->scr_map[i] = sc->scr_rmap[i] = i;
2728 
2729     sc->flags |= SC_INIT_DONE;
2730 }
2731 
2732 #if __i386__
2733 static void
2734 scterm(int unit, int flags)
2735 {
2736     sc_softc_t *sc;
2737     scr_stat *scp;
2738 
2739     sc = sc_get_softc(unit, flags & SC_KERNEL_CONSOLE);
2740     if (sc == NULL)
2741 	return;			/* shouldn't happen */
2742 
2743 #ifdef DEV_SPLASH
2744     /* this console is no longer available for the splash screen */
2745     if (sc->flags & SC_SPLASH_SCRN) {
2746 	splash_term(sc->adp);
2747 	sc->flags &= ~SC_SPLASH_SCRN;
2748     }
2749 #endif
2750 
2751 #if 0 /* XXX */
2752     /* move the hardware cursor to the upper-left corner */
2753     (*vidsw[sc->adapter]->set_hw_cursor)(sc->adp, 0, 0);
2754 #endif
2755 
2756     /* release the keyboard and the video card */
2757     if (sc->keyboard >= 0)
2758 	kbd_release(sc->kbd, &sc->keyboard);
2759     if (sc->adapter >= 0)
2760 	vid_release(sc->adp, &sc->adapter);
2761 
2762     /* stop the terminal emulator, if any */
2763     scp = SC_STAT(sc->dev[0]);
2764     if (scp->tsw)
2765 	(*scp->tsw->te_term)(scp, &scp->ts);
2766     if (scp->ts != NULL)
2767 	free(scp->ts, M_DEVBUF);
2768 
2769     /* clear the structure */
2770     if (!(flags & SC_KERNEL_CONSOLE)) {
2771 	/* XXX: We need delete_dev() for this */
2772 	free(sc->dev, M_DEVBUF);
2773 #if 0
2774 	/* XXX: We need a ttyunregister for this */
2775 	free(sc->tty, M_DEVBUF);
2776 #endif
2777 #ifndef SC_NO_FONT_LOADING
2778 	free(sc->font_8, M_DEVBUF);
2779 	free(sc->font_14, M_DEVBUF);
2780 	free(sc->font_16, M_DEVBUF);
2781 #endif
2782 	/* XXX vtb, history */
2783     }
2784     bzero(sc, sizeof(*sc));
2785     sc->keyboard = -1;
2786     sc->adapter = -1;
2787 }
2788 #endif
2789 
2790 static void
2791 scshutdown(void *arg, int howto)
2792 {
2793     /* assert(sc_console != NULL) */
2794 
2795     sc_touch_scrn_saver();
2796     if (!cold && sc_console
2797 	&& sc_console->sc->cur_scp->smode.mode == VT_AUTO
2798 	&& sc_console->smode.mode == VT_AUTO)
2799 	sc_switch_scr(sc_console->sc, sc_console->index);
2800     shutdown_in_progress = TRUE;
2801 }
2802 
2803 int
2804 sc_clean_up(scr_stat *scp)
2805 {
2806 #ifdef DEV_SPLASH
2807     int error;
2808 #endif
2809 
2810     if (scp->sc->flags & SC_SCRN_BLANKED) {
2811 	sc_touch_scrn_saver();
2812 #ifdef DEV_SPLASH
2813 	if ((error = wait_scrn_saver_stop(scp->sc)))
2814 	    return error;
2815 #endif
2816     }
2817     scp->status |= MOUSE_HIDDEN;
2818     sc_remove_mouse_image(scp);
2819     sc_remove_cutmarking(scp);
2820     return 0;
2821 }
2822 
2823 void
2824 sc_alloc_scr_buffer(scr_stat *scp, int wait, int discard)
2825 {
2826     sc_vtb_t new;
2827     sc_vtb_t old;
2828 
2829     old = scp->vtb;
2830     sc_vtb_init(&new, VTB_MEMORY, scp->xsize, scp->ysize, NULL, wait);
2831     if (!discard && (old.vtb_flags & VTB_VALID)) {
2832 	/* retain the current cursor position and buffer contants */
2833 	scp->cursor_oldpos = scp->cursor_pos;
2834 	/*
2835 	 * This works only if the old buffer has the same size as or larger
2836 	 * than the new one. XXX
2837 	 */
2838 	sc_vtb_copy(&old, 0, &new, 0, scp->xsize*scp->ysize);
2839 	scp->vtb = new;
2840     } else {
2841 	scp->vtb = new;
2842 	sc_vtb_destroy(&old);
2843     }
2844 
2845 #ifndef SC_NO_SYSMOUSE
2846     /* move the mouse cursor at the center of the screen */
2847     sc_mouse_move(scp, scp->xpixel / 2, scp->ypixel / 2);
2848 #endif
2849 }
2850 
2851 static scr_stat
2852 *alloc_scp(sc_softc_t *sc, int vty)
2853 {
2854     scr_stat *scp;
2855 
2856     /* assert(sc_malloc) */
2857 
2858     scp = (scr_stat *)malloc(sizeof(scr_stat), M_DEVBUF, M_WAITOK);
2859     init_scp(sc, vty, scp);
2860 
2861     sc_alloc_scr_buffer(scp, TRUE, TRUE);
2862     if (sc_init_emulator(scp, SC_DFLT_TERM))
2863 	sc_init_emulator(scp, "*");
2864 
2865 #ifndef SC_NO_CUTPASTE
2866     sc_alloc_cut_buffer(scp, TRUE);
2867 #endif
2868 
2869 #ifndef SC_NO_HISTORY
2870     sc_alloc_history_buffer(scp, 0, 0, TRUE);
2871 #endif
2872 
2873     return scp;
2874 }
2875 
2876 static void
2877 init_scp(sc_softc_t *sc, int vty, scr_stat *scp)
2878 {
2879     video_info_t info;
2880 
2881     bzero(scp, sizeof(*scp));
2882 
2883     scp->index = vty;
2884     scp->sc = sc;
2885     scp->status = 0;
2886     scp->mode = sc->initial_mode;
2887     (*vidsw[sc->adapter]->get_info)(sc->adp, scp->mode, &info);
2888     if (info.vi_flags & V_INFO_GRAPHICS) {
2889 	scp->status |= GRAPHICS_MODE;
2890 	scp->xpixel = info.vi_width;
2891 	scp->ypixel = info.vi_height;
2892 	scp->xsize = info.vi_width/8;
2893 	scp->ysize = info.vi_height/info.vi_cheight;
2894 	scp->font_size = 0;
2895 	scp->font = NULL;
2896     } else {
2897 	scp->xsize = info.vi_width;
2898 	scp->ysize = info.vi_height;
2899 	scp->xpixel = scp->xsize*8;
2900 	scp->ypixel = scp->ysize*info.vi_cheight;
2901 	if (info.vi_cheight < 14) {
2902 	    scp->font_size = 8;
2903 #ifndef SC_NO_FONT_LOADING
2904 	    scp->font = sc->font_8;
2905 #else
2906 	    scp->font = NULL;
2907 #endif
2908 	} else if (info.vi_cheight >= 16) {
2909 	    scp->font_size = 16;
2910 #ifndef SC_NO_FONT_LOADING
2911 	    scp->font = sc->font_16;
2912 #else
2913 	    scp->font = NULL;
2914 #endif
2915 	} else {
2916 	    scp->font_size = 14;
2917 #ifndef SC_NO_FONT_LOADING
2918 	    scp->font = sc->font_14;
2919 #else
2920 	    scp->font = NULL;
2921 #endif
2922 	}
2923     }
2924     sc_vtb_init(&scp->vtb, VTB_MEMORY, 0, 0, NULL, FALSE);
2925     sc_vtb_init(&scp->scr, VTB_FRAMEBUFFER, 0, 0, NULL, FALSE);
2926     scp->xoff = scp->yoff = 0;
2927     scp->xpos = scp->ypos = 0;
2928     scp->start = scp->xsize * scp->ysize - 1;
2929     scp->end = 0;
2930     scp->tsw = NULL;
2931     scp->ts = NULL;
2932     scp->rndr = NULL;
2933     scp->border = BG_BLACK;
2934     scp->curr_curs_attr = scp->dflt_curs_attr = sc->curs_attr;
2935     scp->mouse_cut_start = scp->xsize*scp->ysize;
2936     scp->mouse_cut_end = -1;
2937     scp->mouse_signal = 0;
2938     scp->mouse_pid = 0;
2939     scp->mouse_proc = NULL;
2940     scp->kbd_mode = K_XLATE;
2941     scp->bell_pitch = bios_value.bell_pitch;
2942     scp->bell_duration = BELL_DURATION;
2943     scp->status |= (bios_value.shift_state & NLKED);
2944     scp->status |= CURSOR_ENABLED | MOUSE_HIDDEN;
2945     scp->pid = 0;
2946     scp->proc = NULL;
2947     scp->smode.mode = VT_AUTO;
2948     scp->history = NULL;
2949     scp->history_pos = 0;
2950     scp->history_size = 0;
2951 }
2952 
2953 int
2954 sc_init_emulator(scr_stat *scp, char *name)
2955 {
2956     sc_term_sw_t *sw;
2957     sc_rndr_sw_t *rndr;
2958     void *p;
2959     int error;
2960 
2961     if (name == NULL)	/* if no name is given, use the current emulator */
2962 	sw = scp->tsw;
2963     else		/* ...otherwise find the named emulator */
2964 	sw = sc_term_match(name);
2965     if (sw == NULL)
2966 	return EINVAL;
2967 
2968     rndr = NULL;
2969     if (strcmp(sw->te_renderer, "*") != 0) {
2970 	rndr = sc_render_match(scp, sw->te_renderer,
2971 			       scp->status & (GRAPHICS_MODE | PIXEL_MODE));
2972     }
2973     if (rndr == NULL) {
2974 	rndr = sc_render_match(scp, scp->sc->adp->va_name,
2975 			       scp->status & (GRAPHICS_MODE | PIXEL_MODE));
2976 	if (rndr == NULL)
2977 	    return ENODEV;
2978     }
2979 
2980     if (sw == scp->tsw) {
2981 	error = (*sw->te_init)(scp, &scp->ts, SC_TE_WARM_INIT);
2982 	scp->rndr = rndr;
2983 	sc_clear_screen(scp);
2984 	/* assert(error == 0); */
2985 	return error;
2986     }
2987 
2988     if (sc_malloc && (sw->te_size > 0))
2989 	p = malloc(sw->te_size, M_DEVBUF, M_NOWAIT);
2990     else
2991 	p = NULL;
2992     error = (*sw->te_init)(scp, &p, SC_TE_COLD_INIT);
2993     if (error)
2994 	return error;
2995 
2996     if (scp->tsw)
2997 	(*scp->tsw->te_term)(scp, &scp->ts);
2998     if (scp->ts != NULL)
2999 	free(scp->ts, M_DEVBUF);
3000     scp->tsw = sw;
3001     scp->ts = p;
3002     scp->rndr = rndr;
3003 
3004     /* XXX */
3005     (*sw->te_default_attr)(scp, user_default.std_color, user_default.rev_color);
3006     sc_clear_screen(scp);
3007 
3008     return 0;
3009 }
3010 
3011 /*
3012  * scgetc(flags) - get character from keyboard.
3013  * If flags & SCGETC_CN, then avoid harmful side effects.
3014  * If flags & SCGETC_NONBLOCK, then wait until a key is pressed, else
3015  * return NOKEY if there is nothing there.
3016  */
3017 static u_int
3018 scgetc(sc_softc_t *sc, u_int flags)
3019 {
3020     scr_stat *scp;
3021 #ifndef SC_NO_HISTORY
3022     struct tty *tp;
3023 #endif
3024     u_int c;
3025     int this_scr;
3026     int f;
3027     int i;
3028 
3029     if (sc->kbd == NULL)
3030 	return NOKEY;
3031 
3032 next_code:
3033 #if 1
3034     /* I don't like this, but... XXX */
3035     if (flags & SCGETC_CN)
3036 	sccnupdate(sc->cur_scp);
3037 #endif
3038     scp = sc->cur_scp;
3039     /* first see if there is something in the keyboard port */
3040     for (;;) {
3041 	c = kbd_read_char(sc->kbd, !(flags & SCGETC_NONBLOCK));
3042 	if (c == ERRKEY) {
3043 	    if (!(flags & SCGETC_CN))
3044 		sc_bell(scp, bios_value.bell_pitch, BELL_DURATION);
3045 	} else if (c == NOKEY)
3046 	    return c;
3047 	else
3048 	    break;
3049     }
3050 
3051     /* make screensaver happy */
3052     if (!(c & RELKEY))
3053 	sc_touch_scrn_saver();
3054 
3055     if (!(flags & SCGETC_CN))
3056 	random_harvest(&c, sizeof(c), 1, 0, RANDOM_KEYBOARD);
3057 
3058     if (scp->kbd_mode != K_XLATE)
3059 	return KEYCHAR(c);
3060 
3061     /* if scroll-lock pressed allow history browsing */
3062     if (!ISGRAPHSC(scp) && scp->history && scp->status & SLKED) {
3063 
3064 	scp->status &= ~CURSOR_ENABLED;
3065 	sc_remove_cursor_image(scp);
3066 
3067 #ifndef SC_NO_HISTORY
3068 	if (!(scp->status & BUFFER_SAVED)) {
3069 	    scp->status |= BUFFER_SAVED;
3070 	    sc_hist_save(scp);
3071 	}
3072 	switch (c) {
3073 	/* FIXME: key codes */
3074 	case SPCLKEY | FKEY | F(49):  /* home key */
3075 	    sc_remove_cutmarking(scp);
3076 	    sc_hist_home(scp);
3077 	    goto next_code;
3078 
3079 	case SPCLKEY | FKEY | F(57):  /* end key */
3080 	    sc_remove_cutmarking(scp);
3081 	    sc_hist_end(scp);
3082 	    goto next_code;
3083 
3084 	case SPCLKEY | FKEY | F(50):  /* up arrow key */
3085 	    sc_remove_cutmarking(scp);
3086 	    if (sc_hist_up_line(scp))
3087 		if (!(flags & SCGETC_CN))
3088 		    sc_bell(scp, bios_value.bell_pitch, BELL_DURATION);
3089 	    goto next_code;
3090 
3091 	case SPCLKEY | FKEY | F(58):  /* down arrow key */
3092 	    sc_remove_cutmarking(scp);
3093 	    if (sc_hist_down_line(scp))
3094 		if (!(flags & SCGETC_CN))
3095 		    sc_bell(scp, bios_value.bell_pitch, BELL_DURATION);
3096 	    goto next_code;
3097 
3098 	case SPCLKEY | FKEY | F(51):  /* page up key */
3099 	    sc_remove_cutmarking(scp);
3100 	    for (i=0; i<scp->ysize; i++)
3101 	    if (sc_hist_up_line(scp)) {
3102 		if (!(flags & SCGETC_CN))
3103 		    sc_bell(scp, bios_value.bell_pitch, BELL_DURATION);
3104 		break;
3105 	    }
3106 	    goto next_code;
3107 
3108 	case SPCLKEY | FKEY | F(59):  /* page down key */
3109 	    sc_remove_cutmarking(scp);
3110 	    for (i=0; i<scp->ysize; i++)
3111 	    if (sc_hist_down_line(scp)) {
3112 		if (!(flags & SCGETC_CN))
3113 		    sc_bell(scp, bios_value.bell_pitch, BELL_DURATION);
3114 		break;
3115 	    }
3116 	    goto next_code;
3117 	}
3118 #endif /* SC_NO_HISTORY */
3119     }
3120 
3121     /*
3122      * Process and consume special keys here.  Return a plain char code
3123      * or a char code with the META flag or a function key code.
3124      */
3125     if (c & RELKEY) {
3126 	/* key released */
3127 	/* goto next_code */
3128     } else {
3129 	/* key pressed */
3130 	if (c & SPCLKEY) {
3131 	    c &= ~SPCLKEY;
3132 	    switch (KEYCHAR(c)) {
3133 	    /* LOCKING KEYS */
3134 	    case NLK: case CLK: case ALK:
3135 		break;
3136 	    case SLK:
3137 		kbd_ioctl(sc->kbd, KDGKBSTATE, (caddr_t)&f);
3138 		if (f & SLKED) {
3139 		    scp->status |= SLKED;
3140 		} else {
3141 		    if (scp->status & SLKED) {
3142 			scp->status &= ~SLKED;
3143 #ifndef SC_NO_HISTORY
3144 			if (scp->status & BUFFER_SAVED) {
3145 			    if (!sc_hist_restore(scp))
3146 				sc_remove_cutmarking(scp);
3147 			    scp->status &= ~BUFFER_SAVED;
3148 			    scp->status |= CURSOR_ENABLED;
3149 			    sc_draw_cursor_image(scp);
3150 			}
3151 			tp = VIRTUAL_TTY(sc, scp->index);
3152 			if (ISTTYOPEN(tp))
3153 			    scstart(tp);
3154 #endif
3155 		    }
3156 		}
3157 		break;
3158 
3159 	    case PASTE:
3160 #ifndef SC_NO_CUTPASTE
3161 		sc_mouse_paste(scp);
3162 #endif
3163 		break;
3164 
3165 	    /* NON-LOCKING KEYS */
3166 	    case NOP:
3167 	    case LSH:  case RSH:  case LCTR: case RCTR:
3168 	    case LALT: case RALT: case ASH:  case META:
3169 		break;
3170 
3171 	    case BTAB:
3172 		if (!(sc->flags & SC_SCRN_BLANKED))
3173 		    return c;
3174 		break;
3175 
3176 	    case SPSC:
3177 #ifdef DEV_SPLASH
3178 		/* force activatation/deactivation of the screen saver */
3179 		if (!(sc->flags & SC_SCRN_BLANKED)) {
3180 		    run_scrn_saver = TRUE;
3181 		    sc->scrn_time_stamp -= scrn_blank_time;
3182 		}
3183 		if (cold) {
3184 		    /*
3185 		     * While devices are being probed, the screen saver need
3186 		     * to be invoked explictly. XXX
3187 		     */
3188 		    if (sc->flags & SC_SCRN_BLANKED) {
3189 			scsplash_stick(FALSE);
3190 			stop_scrn_saver(sc, current_saver);
3191 		    } else {
3192 			if (!ISGRAPHSC(scp)) {
3193 			    scsplash_stick(TRUE);
3194 			    (*current_saver)(sc, TRUE);
3195 			}
3196 		    }
3197 		}
3198 #endif /* DEV_SPLASH */
3199 		break;
3200 
3201 	    case RBT:
3202 #ifndef SC_DISABLE_REBOOT
3203 		shutdown_nice(0);
3204 #endif
3205 		break;
3206 
3207 	    case HALT:
3208 #ifndef SC_DISABLE_REBOOT
3209 		shutdown_nice(RB_HALT);
3210 #endif
3211 		break;
3212 
3213 	    case PDWN:
3214 #ifndef SC_DISABLE_REBOOT
3215 		shutdown_nice(RB_HALT|RB_POWEROFF);
3216 #endif
3217 		break;
3218 
3219 #ifdef DEV_APM
3220 	    case SUSP:
3221 		apm_suspend(PMST_SUSPEND);
3222 		break;
3223 	    case STBY:
3224 		apm_suspend(PMST_STANDBY);
3225 		break;
3226 #else
3227 	    case SUSP:
3228 	    case STBY:
3229 		break;
3230 #endif
3231 
3232 	    case DBG:
3233 #ifndef SC_DISABLE_DDBKEY
3234 #ifdef DDB
3235 		Debugger("manual escape to debugger");
3236 #else
3237 		printf("No debugger in kernel\n");
3238 #endif
3239 #else /* SC_DISABLE_DDBKEY */
3240 		/* do nothing */
3241 #endif /* SC_DISABLE_DDBKEY */
3242 		break;
3243 
3244 	    case PNC:
3245 		if (enable_panic_key)
3246 			panic("Forced by the panic key");
3247 		break;
3248 
3249 	    case NEXT:
3250 		this_scr = scp->index;
3251 		for (i = (this_scr - sc->first_vty + 1)%sc->vtys;
3252 			sc->first_vty + i != this_scr;
3253 			i = (i + 1)%sc->vtys) {
3254 		    struct tty *tp = VIRTUAL_TTY(sc, sc->first_vty + i);
3255 		    if (ISTTYOPEN(tp)) {
3256 			sc_switch_scr(scp->sc, sc->first_vty + i);
3257 			break;
3258 		    }
3259 		}
3260 		break;
3261 
3262 	    case PREV:
3263 		this_scr = scp->index;
3264 		for (i = (this_scr - sc->first_vty + sc->vtys - 1)%sc->vtys;
3265 			sc->first_vty + i != this_scr;
3266 			i = (i + sc->vtys - 1)%sc->vtys) {
3267 		    struct tty *tp = VIRTUAL_TTY(sc, sc->first_vty + i);
3268 		    if (ISTTYOPEN(tp)) {
3269 			sc_switch_scr(scp->sc, sc->first_vty + i);
3270 			break;
3271 		    }
3272 		}
3273 		break;
3274 
3275 	    default:
3276 		if (KEYCHAR(c) >= F_SCR && KEYCHAR(c) <= L_SCR) {
3277 		    sc_switch_scr(scp->sc, sc->first_vty + KEYCHAR(c) - F_SCR);
3278 		    break;
3279 		}
3280 		/* assert(c & FKEY) */
3281 		if (!(sc->flags & SC_SCRN_BLANKED))
3282 		    return c;
3283 		break;
3284 	    }
3285 	    /* goto next_code */
3286 	} else {
3287 	    /* regular keys (maybe MKEY is set) */
3288 	    if (!(sc->flags & SC_SCRN_BLANKED))
3289 		return c;
3290 	}
3291     }
3292 
3293     goto next_code;
3294 }
3295 
3296 int
3297 scmmap(dev_t dev, vm_offset_t offset, int nprot)
3298 {
3299     scr_stat *scp;
3300 
3301     scp = SC_STAT(dev);
3302     if (scp != scp->sc->cur_scp)
3303 	return -1;
3304     return (*vidsw[scp->sc->adapter]->mmap)(scp->sc->adp, offset, nprot);
3305 }
3306 
3307 static int
3308 save_kbd_state(scr_stat *scp)
3309 {
3310     int state;
3311     int error;
3312 
3313     error = kbd_ioctl(scp->sc->kbd, KDGKBSTATE, (caddr_t)&state);
3314     if (error == ENOIOCTL)
3315 	error = ENODEV;
3316     if (error == 0) {
3317 	scp->status &= ~LOCK_MASK;
3318 	scp->status |= state;
3319     }
3320     return error;
3321 }
3322 
3323 static int
3324 update_kbd_state(scr_stat *scp, int new_bits, int mask)
3325 {
3326     int state;
3327     int error;
3328 
3329     if (mask != LOCK_MASK) {
3330 	error = kbd_ioctl(scp->sc->kbd, KDGKBSTATE, (caddr_t)&state);
3331 	if (error == ENOIOCTL)
3332 	    error = ENODEV;
3333 	if (error)
3334 	    return error;
3335 	state &= ~mask;
3336 	state |= new_bits & mask;
3337     } else {
3338 	state = new_bits & LOCK_MASK;
3339     }
3340     error = kbd_ioctl(scp->sc->kbd, KDSKBSTATE, (caddr_t)&state);
3341     if (error == ENOIOCTL)
3342 	error = ENODEV;
3343     return error;
3344 }
3345 
3346 static int
3347 update_kbd_leds(scr_stat *scp, int which)
3348 {
3349     int error;
3350 
3351     which &= LOCK_MASK;
3352     error = kbd_ioctl(scp->sc->kbd, KDSETLED, (caddr_t)&which);
3353     if (error == ENOIOCTL)
3354 	error = ENODEV;
3355     return error;
3356 }
3357 
3358 int
3359 set_mode(scr_stat *scp)
3360 {
3361     video_info_t info;
3362 
3363     /* reject unsupported mode */
3364     if ((*vidsw[scp->sc->adapter]->get_info)(scp->sc->adp, scp->mode, &info))
3365 	return 1;
3366 
3367     /* if this vty is not currently showing, do nothing */
3368     if (scp != scp->sc->cur_scp)
3369 	return 0;
3370 
3371     /* setup video hardware for the given mode */
3372     (*vidsw[scp->sc->adapter]->set_mode)(scp->sc->adp, scp->mode);
3373     sc_vtb_init(&scp->scr, VTB_FRAMEBUFFER, scp->xsize, scp->ysize,
3374 		(void *)scp->sc->adp->va_window, FALSE);
3375 
3376 #ifndef SC_NO_FONT_LOADING
3377     /* load appropriate font */
3378     if (!(scp->status & GRAPHICS_MODE)) {
3379 	if (!(scp->status & PIXEL_MODE) && ISFONTAVAIL(scp->sc->adp->va_flags)) {
3380 	    if (scp->font_size < 14) {
3381 		if (scp->sc->fonts_loaded & FONT_8)
3382 		    sc_load_font(scp, 0, 8, scp->sc->font_8, 0, 256);
3383 	    } else if (scp->font_size >= 16) {
3384 		if (scp->sc->fonts_loaded & FONT_16)
3385 		    sc_load_font(scp, 0, 16, scp->sc->font_16, 0, 256);
3386 	    } else {
3387 		if (scp->sc->fonts_loaded & FONT_14)
3388 		    sc_load_font(scp, 0, 14, scp->sc->font_14, 0, 256);
3389 	    }
3390 	    /*
3391 	     * FONT KLUDGE:
3392 	     * This is an interim kludge to display correct font.
3393 	     * Always use the font page #0 on the video plane 2.
3394 	     * Somehow we cannot show the font in other font pages on
3395 	     * some video cards... XXX
3396 	     */
3397 	    sc_show_font(scp, 0);
3398 	}
3399 	mark_all(scp);
3400     }
3401 #endif /* !SC_NO_FONT_LOADING */
3402 
3403     sc_set_border(scp, scp->border);
3404     sc_set_cursor_image(scp);
3405 
3406     return 0;
3407 }
3408 
3409 void
3410 sc_set_border(scr_stat *scp, int color)
3411 {
3412     ++scp->sc->videoio_in_progress;
3413     (*scp->rndr->draw_border)(scp, color);
3414     --scp->sc->videoio_in_progress;
3415 }
3416 
3417 #ifndef SC_NO_FONT_LOADING
3418 void
3419 sc_load_font(scr_stat *scp, int page, int size, u_char *buf,
3420 	     int base, int count)
3421 {
3422     sc_softc_t *sc;
3423 
3424     sc = scp->sc;
3425     sc->font_loading_in_progress = TRUE;
3426     (*vidsw[sc->adapter]->load_font)(sc->adp, page, size, buf, base, count);
3427     sc->font_loading_in_progress = FALSE;
3428 }
3429 
3430 void
3431 sc_save_font(scr_stat *scp, int page, int size, u_char *buf,
3432 	     int base, int count)
3433 {
3434     sc_softc_t *sc;
3435 
3436     sc = scp->sc;
3437     sc->font_loading_in_progress = TRUE;
3438     (*vidsw[sc->adapter]->save_font)(sc->adp, page, size, buf, base, count);
3439     sc->font_loading_in_progress = FALSE;
3440 }
3441 
3442 void
3443 sc_show_font(scr_stat *scp, int page)
3444 {
3445     (*vidsw[scp->sc->adapter]->show_font)(scp->sc->adp, page);
3446 }
3447 #endif /* !SC_NO_FONT_LOADING */
3448 
3449 void
3450 sc_paste(scr_stat *scp, u_char *p, int count)
3451 {
3452     struct tty *tp;
3453     u_char *rmap;
3454 
3455     tp = VIRTUAL_TTY(scp->sc, scp->sc->cur_scp->index);
3456     if (!ISTTYOPEN(tp))
3457 	return;
3458     rmap = scp->sc->scr_rmap;
3459     for (; count > 0; --count)
3460 	(*linesw[tp->t_line].l_rint)(rmap[*p++], tp);
3461 }
3462 
3463 void
3464 sc_bell(scr_stat *scp, int pitch, int duration)
3465 {
3466     if (cold || shutdown_in_progress)
3467 	return;
3468 
3469     if (scp != scp->sc->cur_scp && (scp->sc->flags & SC_QUIET_BELL))
3470 	return;
3471 
3472     if (scp->sc->flags & SC_VISUAL_BELL) {
3473 	if (scp->sc->blink_in_progress)
3474 	    return;
3475 	scp->sc->blink_in_progress = 3;
3476 	if (scp != scp->sc->cur_scp)
3477 	    scp->sc->blink_in_progress += 2;
3478 	blink_screen(scp->sc->cur_scp);
3479     } else {
3480 	if (scp != scp->sc->cur_scp)
3481 	    pitch *= 2;
3482 	sysbeep(pitch, duration);
3483     }
3484 }
3485 
3486 static void
3487 blink_screen(void *arg)
3488 {
3489     scr_stat *scp = arg;
3490     struct tty *tp;
3491 
3492     if (ISGRAPHSC(scp) || (scp->sc->blink_in_progress <= 1)) {
3493 	scp->sc->blink_in_progress = 0;
3494     	mark_all(scp);
3495 	tp = VIRTUAL_TTY(scp->sc, scp->index);
3496 	if (ISTTYOPEN(tp))
3497 	    scstart(tp);
3498 	if (scp->sc->delayed_next_scr)
3499 	    sc_switch_scr(scp->sc, scp->sc->delayed_next_scr - 1);
3500     }
3501     else {
3502 	(*scp->rndr->draw)(scp, 0, scp->xsize*scp->ysize,
3503 			   scp->sc->blink_in_progress & 1);
3504 	scp->sc->blink_in_progress--;
3505 	timeout(blink_screen, scp, hz / 10);
3506     }
3507 }
3508