mfb.c revision 1.1 1 /* $NetBSD: mfb.c,v 1.1 1998/10/29 12:24:24 nisimura Exp $ */
2
3 #include <sys/cdefs.h> /* RCS ID & Copyright macro defns */
4
5 __KERNEL_RCSID(0, "$NetBSD: mfb.c,v 1.1 1998/10/29 12:24:24 nisimura Exp $");
6
7 #include <sys/param.h>
8 #include <sys/systm.h>
9 #include <sys/kernel.h>
10 #include <sys/device.h>
11 #include <sys/malloc.h>
12 #include <sys/buf.h>
13 #include <sys/ioctl.h>
14 #include <vm/vm.h>
15
16 #include <machine/bus.h>
17 #include <machine/intr.h>
18
19 #include <dev/rcons/raster.h>
20 #include <dev/wscons/wsconsio.h>
21 #include <dev/wscons/wscons_raster.h>
22 #include <dev/wscons/wsdisplayvar.h>
23 #include <machine/autoconf.h>
24
25 #include <dev/tc/tcvar.h>
26 #include <dev/ic/bt431reg.h>
27
28 #include "opt_uvm.h"
29 #if defined(UVM)
30 #include <uvm/uvm_extern.h>
31 #define useracc uvm_useracc
32 #endif
33
34 /* XXX BUS'IFYING XXX */
35
36 #if defined(__pmax__)
37 #define machine_btop(x) mips_btop(x)
38 #define MACHINE_KSEG0_TO_PHYS(x) MIPS_KSEG0_TO_PHYS(x)
39
40 struct bt455reg {
41 u_int8_t bt_reg;
42 unsigned : 24;
43 u_int8_t bt_cmap;
44 unsigned : 24;
45 u_int8_t bt_clr;
46 unsigned : 24;
47 u_int8_t bt_ovly;
48 };
49
50 /* it's really painful to manipulate 'twined' registers... */
51 struct bt431reg {
52 u_int16_t bt_lo;
53 unsigned : 16;
54 u_int16_t bt_hi;
55 unsigned : 16;
56 u_int16_t bt_ram;
57 unsigned : 16;
58 u_int16_t bt_ctl;
59 };
60
61 #endif
62
63 #if defined(__alpha__) || defined(alpha)
64 /*
65 * Digital UNIX never supports PMAG-AA
66 */
67 #define machine_btop(x) alpha_btop(x)
68 #define MACHINE_KSEG0_TO_PHYS(x) ALPHA_K0SEG_TO_PHYS(x)
69
70 struct bt455reg {
71 u_int32_t bt_reg;
72 u_int32_t bt_cmap;
73 u_int32_t bt_clr;
74 u_int32_t bt_ovly;
75 };
76
77 /* it's really painful to manipulate 'twined' registers... */
78 struct bt431reg {
79 u_int32_t bt_lo;
80 u_int32_t bt_hi;
81 u_int32_t bt_ram;
82 u_int32_t bt_ctl;
83 };
84 #endif
85
86 /* XXX XXX XXX */
87
88 struct fb_devconfig {
89 vaddr_t dc_vaddr; /* memory space virtual base address */
90 paddr_t dc_paddr; /* memory space physical base address */
91 vsize_t dc_size; /* size of slot memory */
92 int dc_wid; /* width of frame buffer */
93 int dc_ht; /* height of frame buffer */
94 int dc_depth; /* depth, bits per pixel */
95 int dc_rowbytes; /* bytes in a FB scan line */
96 vaddr_t dc_videobase; /* base of flat frame buffer */
97 struct raster dc_raster; /* raster description */
98 struct rcons dc_rcons; /* raster blitter control info */
99 int dc_blanked; /* currently has video disabled */
100 };
101
102 struct hwcursor {
103 struct wsdisplay_curpos cc_pos;
104 struct wsdisplay_curpos cc_hot;
105 struct wsdisplay_curpos cc_size;
106 #define CURSOR_MAX_SIZE 64
107 u_int8_t cc_color[6];
108 u_int64_t cc_image[64 + 64];
109 };
110
111 struct mfb_softc {
112 struct device sc_dev;
113 struct fb_devconfig *sc_dc; /* device configuration */
114 struct hwcursor sc_cursor; /* software copy of cursor */
115 int sc_curenb; /* cursor sprite enabled */
116 int sc_changed; /* need update of colormap */
117 #define DATA_ENB_CHANGED 0x01 /* cursor enable changed */
118 #define DATA_CURCMAP_CHANGED 0x02 /* cursor colormap changed */
119 #define DATA_CURSHAPE_CHANGED 0x04 /* cursor size, image, mask changed */
120 #define DATA_CMAP_CHANGED 0x08 /* colormap changed */
121 #define DATA_ALL_CHANGED 0x0f
122 int nscreens;
123 };
124
125 int mfbmatch __P((struct device *, struct cfdata *, void *));
126 void mfbattach __P((struct device *, struct device *, void *));
127
128 struct cfattach mfb_ca = {
129 sizeof(struct mfb_softc), mfbmatch, mfbattach,
130 };
131
132 void mfb_getdevconfig __P((tc_addr_t, struct fb_devconfig *));
133 struct fb_devconfig mfb_console_dc;
134 tc_addr_t mfb_consaddr;
135
136 struct wsdisplay_emulops mfb_emulops = {
137 rcons_cursor, /* could use hardware cursor; punt */
138 rcons_mapchar,
139 rcons_putchar,
140 rcons_copycols,
141 rcons_erasecols,
142 rcons_copyrows,
143 rcons_eraserows,
144 rcons_alloc_attr
145 };
146
147 struct wsscreen_descr mfb_stdscreen = {
148 "std", 0, 0,
149 &mfb_emulops,
150 0, 0,
151 0
152 };
153
154 const struct wsscreen_descr *_mfb_scrlist[] = {
155 &mfb_stdscreen,
156 };
157
158 struct wsscreen_list mfb_screenlist = {
159 sizeof(_mfb_scrlist) / sizeof(struct wsscreen_descr *), _mfb_scrlist
160 };
161
162 int mfbioctl __P((void *, u_long, caddr_t, int, struct proc *));
163 int mfbmmap __P((void *, off_t, int));
164
165 int mfb_alloc_screen __P((void *, const struct wsscreen_descr *,
166 void **, int *, int *, long *));
167 void mfb_free_screen __P((void *, void *));
168 void mfb_show_screen __P((void *, void *));
169 int mfb_load_font __P((void *, void *, int, int, int, void *));
170
171 struct wsdisplay_accessops mfb_accessops = {
172 mfbioctl,
173 mfbmmap,
174 mfb_alloc_screen,
175 mfb_free_screen,
176 mfb_show_screen,
177 mfb_load_font
178 };
179
180 int mfb_cnattach __P((tc_addr_t));
181 int mfbintr __P((void *));
182 void mfbinit __P((struct fb_devconfig *));
183
184 static int set_cursor __P((struct mfb_softc *, struct wsdisplay_cursor *));
185 static int get_cursor __P((struct mfb_softc *, struct wsdisplay_cursor *));
186 static void set_curpos __P((struct mfb_softc *, struct wsdisplay_curpos *));
187 void bt431_set_curpos __P((struct mfb_softc *));
188
189 #define TWIN_LO(x) (twin = (x) & 0x00ff, twin << 8 | twin)
190 #define TWIN_HI(x) (twin = (x) & 0xff00, twin | twin >> 8)
191
192 /* XXX XXX XXX */
193 #define BT431_SELECT(curs, regno) do { \
194 u_int16_t twin; \
195 curs->bt_lo = TWIN_LO(regno); \
196 curs->bt_hi = TWIN_HI(regno); \
197 tc_wmb(); \
198 } while (0)
199
200 #define BT455_SELECT(vdac, index) do { \
201 vdac->bt_reg = index; \
202 vdac->bt_clr = 0; \
203 tc_wmb(); \
204 } while (0)
205 /* XXX XXX XXX */
206
207 #define MFB_FB_OFFSET 0x200000
208 #define MFB_FB_SIZE 0x40000
209 #define MFB_BT455_OFFSET 0x100000
210 #define MFB_BT431_OFFSET 0x180000
211 #define MFB_IREQ_OFFSET 0x080000 /* Interrupt req. control */
212
213 int
214 mfbmatch(parent, match, aux)
215 struct device *parent;
216 struct cfdata *match;
217 void *aux;
218 {
219 struct tc_attach_args *ta = aux;
220
221 if (strncmp("PMAG-AA ", ta->ta_modname, TC_ROM_LLEN) != 0)
222 return (0);
223
224 return (1);
225 }
226
227 void
228 mfb_getdevconfig(dense_addr, dc)
229 tc_addr_t dense_addr;
230 struct fb_devconfig *dc;
231 {
232 struct raster *rap;
233 struct rcons *rcp;
234 int i;
235
236 dc->dc_vaddr = dense_addr;
237 dc->dc_paddr = MACHINE_KSEG0_TO_PHYS(dc->dc_vaddr + MFB_FB_OFFSET);
238
239 dc->dc_wid = 1280;
240 dc->dc_ht = 1024;
241 dc->dc_depth = 1;
242 dc->dc_rowbytes = 2048 / 8;
243 dc->dc_videobase = dc->dc_vaddr + MFB_FB_OFFSET;
244 dc->dc_blanked = 0;
245
246 /* initialize colormap and cursor resource */
247 mfbinit(dc);
248
249 /* clear the screen */
250 for (i = 0; i < dc->dc_ht * dc->dc_rowbytes; i += sizeof(u_int32_t))
251 *(u_int32_t *)(dc->dc_videobase + i) = 0;
252
253 /* initialize the raster */
254 rap = &dc->dc_raster;
255 rap->width = dc->dc_wid;
256 rap->height = dc->dc_ht;
257 rap->depth = dc->dc_depth;
258 rap->linelongs = dc->dc_rowbytes / sizeof(u_int32_t);
259 rap->pixels = (u_int32_t *)dc->dc_videobase;
260
261 /* initialize the raster console blitter */
262 rcp = &dc->dc_rcons;
263 rcp->rc_sp = rap;
264 rcp->rc_crow = rcp->rc_ccol = -1;
265 rcp->rc_crowp = &rcp->rc_crow;
266 rcp->rc_ccolp = &rcp->rc_ccol;
267 rcons_init(rcp, 34, 80);
268
269 mfb_stdscreen.nrows = dc->dc_rcons.rc_maxrow;
270 mfb_stdscreen.ncols = dc->dc_rcons.rc_maxcol;
271 }
272
273 void
274 mfbattach(parent, self, aux)
275 struct device *parent, *self;
276 void *aux;
277 {
278 struct mfb_softc *sc = (struct mfb_softc *)self;
279 struct tc_attach_args *ta = aux;
280 struct wsemuldisplaydev_attach_args waa;
281 caddr_t mfbbase;
282 int console;
283 volatile register int junk;
284
285 console = (ta->ta_addr == mfb_consaddr);
286 if (console) {
287 sc->sc_dc = &mfb_console_dc;
288 sc->nscreens = 1;
289 }
290 else {
291 sc->sc_dc = (struct fb_devconfig *)
292 malloc(sizeof(struct fb_devconfig), M_DEVBUF, M_WAITOK);
293 mfb_getdevconfig(ta->ta_addr, sc->sc_dc);
294 }
295 printf(": %d x %d, %dbpp\n", sc->sc_dc->dc_wid, sc->sc_dc->dc_ht,
296 sc->sc_dc->dc_depth);
297
298 tc_intr_establish(parent, ta->ta_cookie, TC_IPL_TTY, mfbintr, sc);
299
300 mfbbase = (caddr_t)sc->sc_dc->dc_vaddr;
301 *(u_int8_t *)(mfbbase + MFB_IREQ_OFFSET) = 0;
302 junk = *(u_int8_t *)(mfbbase + MFB_IREQ_OFFSET);
303 *(u_int8_t *)(mfbbase + MFB_IREQ_OFFSET) = 1;
304
305 waa.console = console;
306 waa.scrdata = &mfb_screenlist;
307 waa.accessops = &mfb_accessops;
308 waa.accesscookie = sc;
309
310 config_found(self, &waa, wsemuldisplaydevprint);
311 }
312
313 int
314 mfbioctl(v, cmd, data, flag, p)
315 void *v;
316 u_long cmd;
317 caddr_t data;
318 int flag;
319 struct proc *p;
320 {
321 struct mfb_softc *sc = v;
322 struct fb_devconfig *dc = sc->sc_dc;
323 int turnoff;
324
325 switch (cmd) {
326 case WSDISPLAYIO_GTYPE:
327 *(u_int *)data = WSDISPLAY_TYPE_MFB;
328 return (0);
329
330 case WSDISPLAYIO_GINFO:
331 #define wsd_fbip ((struct wsdisplay_fbinfo *)data)
332 wsd_fbip->height = sc->sc_dc->dc_ht;
333 wsd_fbip->width = sc->sc_dc->dc_wid;
334 wsd_fbip->depth = sc->sc_dc->dc_depth;
335 wsd_fbip->cmsize = 0;
336 #undef fbt
337 return (0);
338
339 case WSDISPLAYIO_GETCMAP:
340 case WSDISPLAYIO_PUTCMAP:
341 return (ENOTTY);
342
343 case WSDISPLAYIO_SVIDEO:
344 turnoff = *(int *)data == WSDISPLAYIO_VIDEO_OFF;
345 if ((dc->dc_blanked == 0) ^ turnoff) {
346 /* sc->sc_changed |= DATA_ALL_CHANGED; */
347 dc->dc_blanked = turnoff;
348 }
349 return (0);
350
351 case WSDISPLAYIO_GVIDEO:
352 *(u_int *)data = dc->dc_blanked ?
353 WSDISPLAYIO_VIDEO_OFF : WSDISPLAYIO_VIDEO_ON;
354 return (0);
355
356 case WSDISPLAYIO_GCURPOS:
357 *(struct wsdisplay_curpos *)data = sc->sc_cursor.cc_pos;
358 return (0);
359
360 case WSDISPLAYIO_SCURPOS:
361 set_curpos(sc, (struct wsdisplay_curpos *)data);
362 bt431_set_curpos(sc);
363 return (0);
364
365 case WSDISPLAYIO_GCURMAX:
366 ((struct wsdisplay_curpos *)data)->x =
367 ((struct wsdisplay_curpos *)data)->y = CURSOR_MAX_SIZE;
368 return (0);
369
370 case WSDISPLAYIO_GCURSOR:
371 return get_cursor(sc, (struct wsdisplay_cursor *)data);
372
373 case WSDISPLAYIO_SCURSOR:
374 return set_cursor(sc, (struct wsdisplay_cursor *)data);
375 }
376 return ENOTTY;
377 }
378
379 int
380 mfbmmap(v, offset, prot)
381 void *v;
382 off_t offset;
383 int prot;
384 {
385 struct mfb_softc *sc = v;
386
387 if (offset > MFB_FB_SIZE)
388 return (-1);
389 return machine_btop(sc->sc_dc->dc_paddr + offset);
390 }
391
392 int
393 mfb_alloc_screen(v, type, cookiep, curxp, curyp, attrp)
394 void *v;
395 const struct wsscreen_descr *type;
396 void **cookiep;
397 int *curxp, *curyp;
398 long *attrp;
399 {
400 struct mfb_softc *sc = v;
401 long defattr;
402
403 if (sc->nscreens > 0)
404 return (ENOMEM);
405
406 *cookiep = &sc->sc_dc->dc_rcons; /* one and only for now */
407 *curxp = 0;
408 *curyp = 0;
409 rcons_alloc_attr(&sc->sc_dc->dc_rcons, 0, 0, 0, &defattr);
410 *attrp = defattr;
411 sc->nscreens++;
412 return (0);
413 }
414
415 void
416 mfb_free_screen(v, cookie)
417 void *v;
418 void *cookie;
419 {
420 struct mfb_softc *sc = v;
421
422 if (sc->sc_dc == &mfb_console_dc)
423 panic("mfb_free_screen: console");
424
425 sc->nscreens--;
426 }
427
428 void
429 mfb_show_screen(v, cookie)
430 void *v;
431 void *cookie;
432 {
433 }
434
435 int
436 mfb_load_font(v, cookie, first, num, stride, data)
437 void *v;
438 void *cookie;
439 int first, num, stride;
440 void *data;
441 {
442 return (EINVAL);
443 }
444
445 int
446 mfb_cnattach(addr)
447 tc_addr_t addr;
448 {
449 struct fb_devconfig *dcp = &mfb_console_dc;
450 long defattr;
451
452 mfb_getdevconfig(addr, dcp);
453
454 rcons_alloc_attr(&dcp->dc_rcons, 0, 0, 0, &defattr);
455
456 wsdisplay_cnattach(&mfb_stdscreen, &dcp->dc_rcons,
457 0, 0, defattr);
458 mfb_consaddr = addr;
459 return(0);
460 }
461
462
463 int
464 mfbintr(arg)
465 void *arg;
466 {
467 struct mfb_softc *sc = arg;
468 caddr_t mfbbase = (caddr_t)sc->sc_dc->dc_vaddr;
469 struct bt455reg *vdac;
470 struct bt431reg *curs;
471 int v;
472 volatile register int junk;
473
474 junk = *(u_int8_t *)(mfbbase + MFB_IREQ_OFFSET);
475 /* *(u_int8_t *)(mfbbase + MFB_IREQ_OFFSET) = 1; */
476
477 if (sc->sc_changed == 0)
478 return (1);
479
480 vdac = (void *)(mfbbase + MFB_BT455_OFFSET);
481 curs = (void *)(mfbbase + MFB_BT431_OFFSET);
482
483 v = sc->sc_changed;
484 sc->sc_changed = 0;
485 if (v & DATA_ENB_CHANGED) {
486 BT431_SELECT(curs, BT431_REG_COMMAND);
487 curs->bt_ctl = (sc->sc_curenb) ? 0x4444 : 0x0404;
488 }
489 if (v & DATA_CURSHAPE_CHANGED) {
490 u_int8_t *bp1, *bp2;
491 u_int16_t twin;
492 int index;
493
494 bp1 = (u_int8_t *)&sc->sc_cursor.cc_image;
495 bp2 = (u_int8_t *)(&sc->sc_cursor.cc_image + CURSOR_MAX_SIZE);
496
497 BT431_SELECT(curs, BT431_REG_CRAM_BASE+0);
498 for (index = 0;
499 index < sizeof(sc->sc_cursor.cc_image)/sizeof(u_int16_t);
500 index++) {
501 twin = *bp1++ | (*bp2++ << 8);
502 curs->bt_ram = twin;
503 tc_wmb();
504 }
505 }
506 return (1);
507 }
508
509 void
510 mfbinit(dc)
511 struct fb_devconfig *dc;
512 {
513 caddr_t mfbbase = (caddr_t)dc->dc_vaddr;
514 struct bt431reg *curs = (void *)(mfbbase + MFB_BT431_OFFSET);
515 struct bt455reg *vdac = (void *)(mfbbase + MFB_BT455_OFFSET);
516 int i;
517
518 BT455_SELECT(vdac, 0);
519 vdac->bt_cmap = 0; tc_wmb();
520 vdac->bt_cmap = 0; tc_wmb();
521 vdac->bt_cmap = 0; tc_wmb();
522
523 vdac->bt_cmap = 0; tc_wmb();
524 vdac->bt_cmap = 0xff; tc_wmb();
525 vdac->bt_cmap = 0; tc_wmb();
526
527 for (i = 2; i < 16; i++) {
528 vdac->bt_cmap = 0; tc_wmb();
529 vdac->bt_cmap = 0; tc_wmb();
530 vdac->bt_cmap = 0; tc_wmb();
531 }
532
533 BT455_SELECT(vdac, 8);
534 vdac->bt_cmap = 0; tc_wmb();
535 vdac->bt_cmap = 0; tc_wmb();
536 vdac->bt_cmap = 0; tc_wmb();
537
538 vdac->bt_cmap = 0; tc_wmb();
539 vdac->bt_cmap = 0; tc_wmb();
540 vdac->bt_cmap = 0; tc_wmb();
541
542 vdac->bt_ovly = 0; tc_wmb();
543 vdac->bt_ovly = 0xff; tc_wmb();
544 vdac->bt_ovly = 0; tc_wmb();
545
546 BT431_SELECT(curs, BT431_REG_COMMAND);
547 curs->bt_ctl = 0x0404; tc_wmb();
548 curs->bt_ctl = 0; tc_wmb();
549 curs->bt_ctl = 0; tc_wmb();
550 curs->bt_ctl = 0; tc_wmb();
551 curs->bt_ctl = 0; tc_wmb();
552 curs->bt_ctl = 0; tc_wmb();
553 curs->bt_ctl = 0; tc_wmb();
554 curs->bt_ctl = 0; tc_wmb();
555 curs->bt_ctl = 0; tc_wmb();
556 curs->bt_ctl = 0; tc_wmb();
557 curs->bt_ctl = 0; tc_wmb();
558 curs->bt_ctl = 0; tc_wmb();
559 curs->bt_ctl = 0; tc_wmb();
560 }
561
562 static int
563 set_cursor(sc, p)
564 struct mfb_softc *sc;
565 struct wsdisplay_cursor *p;
566 {
567 #define cc (&sc->sc_cursor)
568 int v, count;
569
570 v = p->which;
571 if (v & WSDISPLAY_CURSOR_DOSHAPE) {
572 if (p->size.x > CURSOR_MAX_SIZE || p->size.y > CURSOR_MAX_SIZE)
573 return (EINVAL);
574 count = (CURSOR_MAX_SIZE / NBBY) * p->size.y;
575 if (!useracc(p->image, count, B_READ) ||
576 !useracc(p->mask, count, B_READ))
577 return (EFAULT);
578 }
579 if (v & (WSDISPLAY_CURSOR_DOPOS | WSDISPLAY_CURSOR_DOCUR)) {
580 if (v & WSDISPLAY_CURSOR_DOCUR)
581 cc->cc_hot = p->hot;
582 if (v & WSDISPLAY_CURSOR_DOPOS)
583 set_curpos(sc, &p->pos);
584 bt431_set_curpos(sc);
585 }
586
587 sc->sc_changed = 0;
588 if (v & WSDISPLAY_CURSOR_DOCUR) {
589 sc->sc_curenb = p->enable;
590 sc->sc_changed |= DATA_ENB_CHANGED;
591 }
592 if (v & WSDISPLAY_CURSOR_DOSHAPE) {
593 cc->cc_size = p->size;
594 memset(cc->cc_image, 0, sizeof cc->cc_image);
595 copyin(p->image, (caddr_t)cc->cc_image, count);
596 copyin(p->mask, (caddr_t)(cc->cc_image+CURSOR_MAX_SIZE), count);
597 sc->sc_changed |= DATA_CURSHAPE_CHANGED;
598 }
599
600 return (0);
601 #undef cc
602 }
603
604 static int
605 get_cursor(sc, p)
606 struct mfb_softc *sc;
607 struct wsdisplay_cursor *p;
608 {
609 return (ENOTTY); /* XXX */
610 }
611
612 static void
613 set_curpos(sc, curpos)
614 struct mfb_softc *sc;
615 struct wsdisplay_curpos *curpos;
616 {
617 struct fb_devconfig *dc = sc->sc_dc;
618 int x = curpos->x, y = curpos->y;
619
620 if (y < 0)
621 y = 0;
622 else if (y > dc->dc_ht - sc->sc_cursor.cc_size.y - 1)
623 y = dc->dc_ht - sc->sc_cursor.cc_size.y - 1;
624 if (x < 0)
625 x = 0;
626 else if (x > dc->dc_wid - sc->sc_cursor.cc_size.x - 1)
627 x = dc->dc_wid - sc->sc_cursor.cc_size.x - 1;
628 sc->sc_cursor.cc_pos.x = x;
629 sc->sc_cursor.cc_pos.y = y;
630 }
631
632 void
633 bt431_set_curpos(sc)
634 struct mfb_softc *sc;
635 {
636 caddr_t mfbbase = (caddr_t)sc->sc_dc->dc_vaddr;
637 struct bt431reg *curs = (void *)(mfbbase + MFB_BT431_OFFSET);
638 int x = 360, y = 36; /* magic offset of MX coordinate */
639 u_int16_t twin;
640 int s;
641
642 x += sc->sc_cursor.cc_pos.x;
643 y += sc->sc_cursor.cc_pos.y;
644
645 #if 0 /* MACH legend tells */
646 /*
647 * Cx = x + D + H - P
648 * P = 37 if 1:1, 52 if 4:1, 57 if 5:1
649 * D = pixel skew between outdata and external data
650 * H = pixels between HSYNCH falling and active video
651 *
652 * Cy = y + V - 32
653 * V = scanlines between HSYNCH falling, two or more
654 * clocks after VSYNCH falling, and active video
655 */
656 #endif
657 s = spltty();
658
659 BT431_SELECT(curs, BT431_REG_CURSOR_X_LOW);
660 curs->bt_ctl = TWIN_LO(x);
661 curs->bt_ctl = TWIN_HI(x);
662 curs->bt_ctl = TWIN_LO(y);
663 curs->bt_ctl = TWIN_HI(y);
664
665 splx(s);
666 }
667