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[netbsd-mini2440.git] / sys / arch / atari / dev / grfabs_fal.c
blob3eaacbfebebc693997af9871e691a0236cb1aa7a
1 /* $NetBSD: grfabs_fal.c,v 1.25 2009/07/19 05:43:22 tsutsui Exp $ */
2
3 /*
4 * Copyright (c) 1995 Thomas Gerner.
5 * Copyright (c) 1995 Leo Weppelman.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
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
29 #include <sys/cdefs.h>
30 __KERNEL_RCSID(0, "$NetBSD: grfabs_fal.c,v 1.25 2009/07/19 05:43:22 tsutsui Exp $");
31
32 #ifdef FALCON_VIDEO
33 /*
34 * atari abstract graphics driver: Falcon-interface
35 */
36 #include <sys/param.h>
37 #include <sys/queue.h>
38 #include <sys/malloc.h>
39 #include <sys/device.h>
40 #include <sys/systm.h>
41
42 #include <uvm/uvm_extern.h>
43
44 #include <machine/iomap.h>
45 #include <machine/video.h>
46 #include <machine/mfp.h>
47 #include <atari/atari/device.h>
48 #include <atari/atari/stalloc.h>
49 #include <atari/dev/grfabs_reg.h>
50 #include <atari/dev/grfabs_fal.h>
51
52 /*
53 * Function decls
54 */
55 static void init_view(view_t *, bmap_t *, dmode_t *, box_t *);
56 static bmap_t *alloc_bitmap(u_long, u_long, u_char);
57 static colormap_t *alloc_colormap(dmode_t *);
58 static void free_bitmap(bmap_t *);
59 static void falcon_display_view(view_t *);
60 static view_t *falcon_alloc_view(dmode_t *, dimen_t *, u_char);
61 static void falcon_free_view(view_t *);
62 static void falcon_remove_view(view_t *);
63 static void falcon_save_view(view_t *);
64 static int falcon_use_colormap(view_t *, colormap_t *);
65 static void falcon_detect(dmode_t *);
66 static struct videl *falcon_getreg(u_short);
67
68 /*
69 * Our function switch table
70 */
71 struct grfabs_sw fal_vid_sw = {
72 falcon_display_view,
73 falcon_alloc_view,
74 falcon_free_view,
75 falcon_remove_view,
76 falcon_save_view,
77 falcon_use_colormap
78 };
79
80 struct falcon_hwregs {
81 u_short fal_mode; /* falcon mode */
82 struct videl *fal_regs; /* videl register values */
83 };
84 #define vm_mode(dm) (((struct falcon_hwregs*)(dm->data))->fal_mode)
85 #define vm_regs(dm) (((struct falcon_hwregs*)(dm->data))->fal_regs)
86
87 /*
88 * Note that the order of this table *must* match the order of
89 * the table below!
90 */
91 static struct falcon_hwregs fal_hwregs[] = {
92 { RES_FALAUTO },
93 { RES_FAL_STHIGH },
94 { RES_FAL_STMID },
95 { RES_FAL_STLOW },
96 { RES_FAL_TTLOW },
97 { RES_VGA2 },
98 { RES_VGA4 },
99 { RES_VGA16 },
100 { RES_VGA256 },
101 { RES_DIRECT }
102 };
103
104
105 static dmode_t vid_modes[] = {
106 { {NULL,NULL}, "falauto", { 0, 0 }, 0, NULL, &fal_vid_sw},
107 { {NULL,NULL}, "sthigh", { 640,400 }, 1, NULL, &fal_vid_sw},
108 { {NULL,NULL}, "stmid", { 640,200 }, 2, NULL, &fal_vid_sw},
109 { {NULL,NULL}, "stlow", { 320,200 }, 4, NULL, &fal_vid_sw},
110 { {NULL,NULL}, "ttlow", { 320,480 }, 8, NULL, &fal_vid_sw},
111 { {NULL,NULL}, "vga2", { 640,480 }, 1, NULL, &fal_vid_sw},
112 { {NULL,NULL}, "vga4", { 640,480 }, 2, NULL, &fal_vid_sw},
113 { {NULL,NULL}, "vga16", { 640,480 }, 4, NULL, &fal_vid_sw},
114 { {NULL,NULL}, "vga256", { 640,480 }, 8, NULL, &fal_vid_sw},
115 { {NULL,NULL}, "highcol", { 320,200 }, 16, NULL, &fal_vid_sw},
116 { {NULL,NULL}, NULL, }
117 };
118
119 /*
120 * The following table contains timing values for the various video modes.
121 * I have only a multisync display, therefore I can not say if this values
122 * are useful at other displays.
123 * Use other video modes at YOUR OWN RISK.
124 * THERE IS NO WARRENTY ABOUT THIS VALUES TO WORK WITH A PARTICULAR
125 * DISPLAY. -- Thomas
126 */
127 static struct videl videlinit[] = {
128 { RES_FALAUTO, /* autodedect */
129 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
130 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0 },
131
132 { FAL_VGA | RES_FAL_STHIGH, /* sthigh, 640x400, 2 colors */
133 0x2, 0x0, 0x28, 0x0, 0x400, 0xc6, 0x8d, 0x15, 0x273, 0x50, 0x96, 0x0,
134 0x0, 0x419, 0x3af, 0x8f, 0x8f, 0x3af, 0x415, 0x186, 0x8 },
135
136 #if 0 /* not yet */
137 { FAL_SM | RES_FAL_STHIGH, /* sthigh, 640x400, 2 colors */
138 0x0, 0x0, 0x28, 0x2, 0x0, 0x1a, 0x0, 0x0, 0x20f, 0xc, 0x14, 0x0,
139 0x0, 0x3e9, 0x0, 0x0, 0x43, 0x363, 0x3e7, 0x80, 0x8 },
140 #endif
141
142 { FAL_VGA | RES_FAL_STMID, /* stmid, 640x200, 4 colors */
143 0x2, 0x0, 0x50, 0x1, 0x0, 0x17, 0x12, 0x1, 0x20e, 0xd, 0x11, 0x0,
144 0x0, 0x419, 0x3af, 0x8f, 0x8f, 0x3af, 0x415, 0x186, 0x9 },
145
146 { FAL_VGA | RES_FAL_STLOW, /* stlow, 320x200, 16 colors */
147 0x2, 0x0, 0x50, 0x0, 0x0, 0x17, 0x12, 0x1, 0x20e, 0xd, 0x11, 0x0,
148 0x0, 0x419, 0x3af, 0x8f, 0x8f, 0x3af, 0x415, 0x186, 0x5 },
149
150 { FAL_VGA | RES_FAL_TTLOW, /* ttlow, 320x480, 256 colors */
151 0x2, 0x0, 0xa0, 0x0, 0x10, 0xc6, 0x8d, 0x15, 0x29a, 0x7b, 0x96, 0x0,
152 0x0, 0x419, 0x3ff, 0x3f, 0x3f, 0x3ff, 0x415, 0x186, 0x4 },
153
154 { FAL_VGA | RES_VGA2, /* vga, 640x480, 2 colors */
155 0x2, 0x0, 0x28, 0x0, 0x400, 0xc6, 0x8d, 0x15, 0x273, 0x50, 0x96, 0x0,
156 0x0, 0x419, 0x3ff, 0x3f, 0x3f, 0x3ff, 0x415, 0x186, 0x8 },
157
158 { FAL_VGA | RES_VGA4, /* vga, 640x480, 4 colors */
159 0x2, 0x0, 0x50, 0x1, 0x0, 0x17, 0x12, 0x1, 0x20e, 0xd, 0x11, 0x0,
160 0x0, 0x419, 0x3ff, 0x3f, 0x3f, 0x3ff, 0x415, 0x186, 0x8 },
161
162 { FAL_VGA | RES_VGA16, /* vga, 640x480, 16 colors */
163 0x2, 0x0, 0xa0, 0x1, 0x0, 0xc6, 0x8d, 0x15, 0x2a3, 0x7c, 0x96, 0x0,
164 0x0, 0x419, 0x3ff, 0x3f, 0x3f, 0x3ff, 0x415, 0x186, 0x8 },
165
166 { FAL_VGA | RES_VGA256, /* vga, 640x480, 256 colors */
167 0x2, 0x0, 0x140, 0x1, 0x10, 0xc6, 0x8d, 0x15, 0x2ab, 0x84, 0x96, 0x0,
168 0x0, 0x419, 0x3ff, 0x3f, 0x3f, 0x3ff, 0x415, 0x186, 0x8 },
169
170 { FAL_VGA | RES_DIRECT, /* direct video, 320x200, 65536 colors */
171 0x2, 0x0, 0x140, 0x0, 0x100, 0xc6, 0x8d, 0x15, 0x2ac, 0x91, 0x96, 0x0,
172 0x0, 0x419, 0x3ff, 0x3f, 0x3f, 0x3ff, 0x415, 0x186, 0x4 },
173
174 { 0xffff } /* end of list */
175 };
176
177 static u_short mon_type;
178 /*
179 * XXX: called from ite console init routine.
180 * Initialize list of possible video modes.
181 */
182 void
183 falcon_probe_video(MODES *modelp)
184 {
185 dmode_t *dm;
186 struct videl *vregs;
187 int i;
188
189 mon_type = *(volatile unsigned char *)(AD_FAL_MON_TYPE);
190 mon_type = (mon_type & 0xc0) << 2;
191
192 /*
193 * get all possible modes
194 */
195
196 for (i = 0; (dm = &vid_modes[i])->name != NULL; i++) {
197 dm->data = (void *)&fal_hwregs[i];
198 if (vm_mode(dm) == RES_FALAUTO) {
199 vm_regs(dm) = falcon_getreg(RES_FALAUTO);
200 falcon_detect(dm);
201 LIST_INSERT_HEAD(modelp, dm, link);
202 } else {
203 vregs = falcon_getreg(vm_mode(dm) | mon_type);
204 if (vregs) {
205 vm_regs(dm) = vregs;
206 LIST_INSERT_HEAD(modelp, dm, link);
207 }
208 }
209 }
210
211 /*
212 * This seems to prevent bordered screens.
213 */
214 for (i=0; i < 16; i++)
215 VIDEO->vd_fal_rgb[i] = CM_L2FAL(gra_def_color16[i]);
216 }
217
218 static struct videl *
219 falcon_getreg(u_short mode)
220 {
221 int i;
222 struct videl *vregs;
223
224 for (i = 0; (vregs = &videlinit[i])->video_mode != 0xffff; i++)
225 if ((vregs->video_mode) == mode)
226 return vregs;
227
228 return NULL; /* mode not found */
229 }
230
231 static void
232 falcon_detect(dmode_t *dm)
233 {
234 u_short falshift, stshift;
235 struct videl *vregs = vm_regs(dm);
236
237 /*
238 * First get the videl register values
239 */
240
241 vregs->vd_syncmode = VIDEO->vd_sync;
242 vregs->vd_line_wide = VIDEO->vd_line_wide;
243 vregs->vd_vert_wrap = VIDEO->vd_vert_wrap;
244 vregs->vd_st_res = VIDEO->vd_st_res;
245 vregs->vd_fal_res = VIDEO->vd_fal_res;
246 vregs->vd_h_hold_tim = VIDEO->vd_h_hold_tim;
247 vregs->vd_h_bord_beg = VIDEO->vd_h_bord_beg;
248 vregs->vd_h_bord_end = VIDEO->vd_h_bord_end;
249 vregs->vd_h_dis_beg = VIDEO->vd_h_dis_beg;
250 vregs->vd_h_dis_end = VIDEO->vd_h_dis_end;
251 vregs->vd_h_ss = VIDEO->vd_h_ss;
252 vregs->vd_h_fs = VIDEO->vd_h_fs;
253 vregs->vd_h_hh = VIDEO->vd_h_hh;
254 vregs->vd_v_freq_tim = VIDEO->vd_v_freq_tim;
255 vregs->vd_v_bord_beg = VIDEO->vd_v_bord_beg;
256 vregs->vd_v_bord_end = VIDEO->vd_v_bord_end;
257 vregs->vd_v_dis_beg = VIDEO->vd_v_dis_beg;
258 vregs->vd_v_dis_end = VIDEO->vd_v_dis_end;
259 vregs->vd_v_ss = VIDEO->vd_v_ss;
260 vregs->vd_fal_ctrl = VIDEO->vd_fal_ctrl;
261 vregs->vd_fal_mode = VIDEO->vd_fal_mode;
262
263
264 /*
265 * Calculate the depth of the screen
266 */
267
268 falshift = vregs->vd_fal_res;
269 stshift = vregs->vd_st_res;
270
271 if (falshift & 0x400) /* 2 color */
272 dm->depth = 1;
273 else if (falshift & 0x100) /* high color, direct */
274 dm->depth = 16;
275 else if (falshift & 0x10) /* 256 color */
276 dm->depth = 8;
277 else if (stshift == 0) /* 16 color */
278 dm->depth = 4;
279 else if (stshift == 1) /* 4 color */
280 dm->depth = 2;
281 else dm->depth = 1; /* 2 color */
282
283 /*
284 * Now calculate the screen hight
285 */
286
287 dm->size.height = vregs->vd_v_dis_end - vregs->vd_v_dis_beg;
288 if (!((vregs->vd_fal_mode & 0x2) >> 1)) /* if not interlaced */
289 dm->size.height >>=1;
290 if (vregs->vd_fal_mode & 0x1) /* if doublescan */
291 dm->size.height >>=1;
292
293 /*
294 * And the width
295 */
296
297 dm->size.width = vregs->vd_vert_wrap * 16 / dm->depth;
298
299 }
300
301 u_long falcon_needs_vbl;
302 void falcon_display_switch(void);
303
304 static void
305 falcon_display_view(view_t *v)
306 {
307 dmode_t *dm = v->mode;
308 bmap_t *bm;
309 struct videl *vregs;
310 static u_short last_mode = 0xffff;
311
312 if (dm->current_view) {
313 /*
314 * Mark current view for this mode as no longer displayed
315 */
316 dm->current_view->flags &= ~VF_DISPLAY;
317 }
318 dm->current_view = v;
319 v->flags |= VF_DISPLAY;
320 vregs = vm_regs(v->mode);
321
322 falcon_use_colormap(v, v->colormap);
323
324 bm = v->bitmap;
325 VIDEO->vd_ramh = ((u_long)bm->hw_address >> 16) & 0xff;
326 VIDEO->vd_ramm = ((u_long)bm->hw_address >> 8) & 0xff;
327 VIDEO->vd_raml = (u_long)bm->hw_address & 0xff;
328
329 if (last_mode != vregs->video_mode) {
330 last_mode = vregs->video_mode;
331
332 if (dm->depth == 1) {
333 /*
334 * Set the resolution registers to a mode, which guarantee
335 * no shifting when the register are written during vbl.
336 */
337 VIDEO->vd_fal_res = 0;
338 VIDEO->vd_st_res = 0;
339 }
340
341 /*
342 * Arrange for them to be activated
343 * at the second vbl interrupt.
344 */
345 falcon_needs_vbl = (u_long)v;
346 }
347 }
348
349 void
350 falcon_display_switch(void)
351 {
352 view_t *v;
353 struct videl *vregs;
354 static int vbl_count = 1;
355
356 if(vbl_count--) return;
357
358 v = (view_t*)falcon_needs_vbl;
359
360 vbl_count = 1;
361 falcon_needs_vbl = 0;
362
363 /*
364 * Write to videl registers only on VGA displays
365 * This is only a hack. Must be fixed soon. XXX -- Thomas
366 */
367 if(mon_type != FAL_VGA) return;
368
369 vregs = vm_regs(v->mode);
370
371 VIDEO->vd_v_freq_tim = vregs->vd_v_freq_tim;
372 VIDEO->vd_v_ss = vregs->vd_v_ss;
373 VIDEO->vd_v_bord_beg = vregs->vd_v_bord_beg;
374 VIDEO->vd_v_bord_end = vregs->vd_v_bord_end;
375 VIDEO->vd_v_dis_beg = vregs->vd_v_dis_beg;
376 VIDEO->vd_v_dis_end = vregs->vd_v_dis_end;
377 VIDEO->vd_h_hold_tim = vregs->vd_h_hold_tim;
378 VIDEO->vd_h_ss = vregs->vd_h_ss;
379 VIDEO->vd_h_bord_beg = vregs->vd_h_bord_beg;
380 VIDEO->vd_h_bord_end = vregs->vd_h_bord_end;
381 VIDEO->vd_h_dis_beg = vregs->vd_h_dis_beg;
382 VIDEO->vd_h_dis_end = vregs->vd_h_dis_end;
383 #if 0 /* This seems not to be necessary -- Thomas */
384 VIDEO->vd_h_fs = vregs->vd_h_fs;
385 VIDEO->vd_h_hh = vregs->vd_h_hh;
386 #endif
387 VIDEO->vd_sync = vregs->vd_syncmode;
388 VIDEO->vd_fal_res = 0;
389 if (v->mode->depth == 2)
390 VIDEO->vd_st_res = vregs->vd_st_res;
391 else {
392 VIDEO->vd_st_res = 0;
393 VIDEO->vd_fal_res = vregs->vd_fal_res;
394 }
395 VIDEO->vd_vert_wrap = vregs->vd_vert_wrap;
396 VIDEO->vd_line_wide = vregs->vd_line_wide;
397 VIDEO->vd_fal_ctrl = vregs->vd_fal_ctrl;
398 VIDEO->vd_fal_mode = vregs->vd_fal_mode;
399 }
400
401 static void
402 falcon_remove_view(view_t *v)
403 {
404 dmode_t *mode = v->mode;
405
406 if (mode->current_view == v) {
407 #if 0
408 if (v->flags & VF_DISPLAY)
409 panic("Cannot shutdown display"); /* XXX */
410 #endif
411 mode->current_view = NULL;
412 }
413 v->flags &= ~VF_DISPLAY;
414 }
415
416 void
417 falcon_save_view(view_t *v)
418 {
419 }
420
421 static void
422 falcon_free_view(view_t *v)
423 {
424 if (v) {
425 falcon_remove_view(v);
426 if (v->colormap != &gra_con_cmap)
427 free(v->colormap, M_DEVBUF);
428 free_bitmap(v->bitmap);
429 if (v != &gra_con_view)
430 free(v, M_DEVBUF);
431 }
432 }
433
434 static int
435 falcon_use_colormap(view_t *v, colormap_t *cm)
436 {
437 dmode_t *dm;
438 volatile u_short *creg;
439 volatile u_long *fcreg;
440 u_long *src;
441 colormap_t *vcm;
442 u_long *vcreg;
443 u_short ncreg;
444 int last_streg;
445 int i;
446
447 dm = v->mode;
448 vcm = v->colormap;
449
450 /*
451 * I guess it seems reasonable to require the maps to be
452 * of the same type...
453 */
454 if (cm->type != vcm->type)
455 return (EINVAL);
456
457 /*
458 * First get the colormap addresses an calculate
459 * howmany colors are in it.
460 */
461 if (dm->depth == 16) /* direct color, no colormap;
462 but also not (yet) supported */
463 return(0);
464 fcreg = &VIDEO->vd_fal_rgb[0];
465 creg = &VIDEO->vd_st_rgb[0];
466 ncreg = 1 << dm->depth;
467
468 /* If first entry specified beyond capabilities -> error */
469 if (cm->first >= ncreg)
470 return (EINVAL);
471
472 /*
473 * A little tricky, the actual colormap pointer will be NULL
474 * when view is not displaying, valid otherwise.
475 */
476 if (v->flags & VF_DISPLAY) {
477 creg = &creg[cm->first];
478 fcreg = &fcreg[cm->first];
479 } else {
480 creg = NULL;
481 fcreg = NULL;
482 }
483
484 vcreg = &vcm->entry[cm->first];
485 ncreg -= cm->first;
486 last_streg = 16 - cm->first;
487 if (cm->size > ncreg)
488 return (EINVAL);
489 ncreg = cm->size;
490
491 for (i = 0, src = cm->entry; i < ncreg; i++, vcreg++) {
492 *vcreg = *src++;
493
494 /*
495 * If displaying, also update actual color register.
496 */
497 if (fcreg != NULL) {
498 *fcreg++ = CM_L2FAL(*vcreg);
499 if (i < last_streg)
500 *creg++ = CM_L2ST(*vcreg);
501 }
502 }
503 return (0);
504 }
505
506 static view_t *
507 falcon_alloc_view(dmode_t *mode, dimen_t *dim, u_char depth)
508 {
509 view_t *v;
510 bmap_t *bm;
511
512 if (!atari_realconfig)
513 v = &gra_con_view;
514 else v = malloc(sizeof(*v), M_DEVBUF, M_NOWAIT);
515 if (v == NULL)
516 return(NULL);
517
518 bm = alloc_bitmap(mode->size.width, mode->size.height, mode->depth);
519 if (bm) {
520 box_t box;
521
522 v->colormap = alloc_colormap(mode);
523 if (v->colormap) {
524 INIT_BOX(&box,0,0,mode->size.width,mode->size.height);
525 init_view(v, bm, mode, &box);
526 return(v);
527 }
528 free_bitmap(bm);
529 }
530 if (v != &gra_con_view)
531 free(v, M_DEVBUF);
532 return (NULL);
533 }
534
535 static void
536 init_view(view_t *v, bmap_t *bm, dmode_t *mode, box_t *dbox)
537 {
538 v->bitmap = bm;
539 v->mode = mode;
540 v->flags = 0;
541 memcpy(&v->display, dbox, sizeof(box_t));
542 }
543
544 /* bitmap functions */
545
546 static bmap_t *
547 alloc_bitmap(u_long width, u_long height, u_char depth)
548 {
549 u_long total_size, bm_size;
550 void *hw_address;
551 bmap_t *bm;
552
553 /*
554 * Sigh, it seems for mapping to work we need the bitplane data to
555 * 1: be aligned on a page boundry.
556 * 2: be n pages large.
557 *
558 * why? because the user gets a page aligned address, if this is before
559 * your allocation, too bad. Also it seems that the mapping routines
560 * do not watch to closely to the allowable length. so if you go over
561 * n pages by less than another page, the user gets to write all over
562 * the entire page. Since you did not allocate up to a page boundry
563 * (or more) the user writes into someone elses memory. -ch
564 */
565 bm_size = m68k_round_page((width * height * depth) / NBBY);
566 total_size = bm_size + sizeof(bmap_t) + PAGE_SIZE;
567
568 if ((bm = (bmap_t*)alloc_stmem(total_size, &hw_address)) == NULL)
569 return(NULL);
570
571 bm->plane = (u_char*)bm + sizeof(bmap_t);
572 bm->plane = (u_char*)m68k_round_page(bm->plane);
573 bm->hw_address = (u_char*)hw_address + sizeof(bmap_t);
574 bm->hw_address = (u_char*)m68k_round_page(bm->hw_address);
575 bm->bytes_per_row = (width * depth) / NBBY;
576 bm->rows = height;
577 bm->depth = depth;
578 bm->phys_mappable = (depth * width * height) / NBBY;
579 bm->regs = NULL;
580 bm->hw_regs = NULL;
581 bm->reg_size = 0;
582 bm->vga_address = NULL;
583 bm->vga_mappable = 0;
584 bm->lin_base = 0;
585 bm->vga_base = 0;
586
587 memset(bm->plane, 0, bm_size);
588 return (bm);
589 }
590
591 static void
592 free_bitmap(bmap_t *bm)
593 {
594 if (bm)
595 free_stmem(bm);
596 }
597
598 static colormap_t *
599 alloc_colormap(dmode_t *dm)
600 {
601 int nentries, i;
602 colormap_t *cm;
603 u_char type = CM_COLOR;
604
605 if (dm->depth == 16) /* direct color, no colormap;
606 not (yet) supported */
607 nentries = 0;
608 else
609 nentries = 1 << dm->depth;
610
611 if (!atari_realconfig) {
612 cm = &gra_con_cmap;
613 cm->entry = gra_con_colors;
614 }
615 else {
616 int size;
617
618 size = sizeof(*cm) + (nentries * sizeof(cm->entry[0]));
619 cm = malloc(size, M_DEVBUF, M_NOWAIT);
620 if (cm == NULL)
621 return(NULL);
622 cm->entry = (long *)&cm[1];
623
624 }
625
626 if ((cm->type = type) == CM_COLOR)
627 cm->red_mask = cm->green_mask = cm->blue_mask = 0x3f;
628
629 cm->first = 0;
630 cm->size = nentries;
631
632 for (i = 0; i < nentries; i++)
633 cm->entry[i] = gra_def_color16[i % 16];
634 return (cm);
635 }
636 #endif /* FALCON_VIDEO */
NetBSD on the FriendlyARM MINI2440