/[gxemul]/trunk/src/devices/dev_bt459.c
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Annotation of /trunk/src/devices/dev_bt459.c

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Mon Oct 8 16:19:37 2007 UTC (13 years, 3 months ago) by dpavlin
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++ trunk/HISTORY	(local)
$Id: HISTORY,v 1.1121 2006/02/18 21:03:08 debug Exp $
20051126	Cobalt and PReP now work with the 21143 NIC.
		Continuing on Alpha dyntrans things.
		Fixing some more left-shift-by-24 to unsigned.
20051127	Working on OpenFirmware emulation; major cleanup/redesign.
		Progress on MacPPC emulation: NetBSD detects two CPUs (when
		running with -n 2), framebuffer output (for text) works.
		Adding quick-hack Bandit PCI controller and "gc" interrupt
		controller for MacPPC.
20051128	Changing from a Bandit to a Uni-North controller for macppc.
		Continuing on OpenFirmware and MacPPC emulation in general
		(obio controller, and wdc attached to the obio seems to work).
20051129	More work on MacPPC emulation (adding a dummy ADB controller).
		Continuing the PCI bus cleanup (endianness and tag composition)
		and rewriting all PCI controllers' access functions.
20051130	Various minor PPC dyntrans optimizations.
		Manually inlining some parts of the framebuffer redraw routine.
		Slowly beginning the conversion of the old MIPS emulation into
		dyntrans (but this will take quite some time to get right).
		Generalizing quick_pc_to_pointers.
20051201	Documentation update (David Muse has made available a kernel
		which simplifies Debian/DECstation installation).
		Continuing on the ADB bus controller.
20051202	Beginning a rewrite of the Zilog serial controller (dev_zs).
20051203	Continuing on the zs rewrite (now called dev_z8530); conversion
		to devinit style.
		Reworking some of the input-only vs output-only vs input-output
		details of src/console.c, better warning messages, and adding
		a debug dump.
		Removing the concept of "device state"; it wasn't really used.
		Changing some debug output (-vv should now be used to show all
		details about devices and busses; not shown during normal
		startup anymore).
		Beginning on some SPARC instruction disassembly support.
20051204	Minor PPC updates (WALNUT skeleton stuff).
		Continuing on the MIPS dyntrans rewrite.
		More progress on the ADB controller (a keyboard is "detected"
		by NetBSD and OpenBSD).
		Downgrading OpenBSD/arc as a guest OS from "working" to
		"almost working" in the documentation.
		Progress on Algor emulation ("v3" PCI controller).
20051205	Minor updates.
20051207	Sorting devices according to address; this reduces complexity
		of device lookups from O(n) to O(log n) in memory_rw (but no
		real performance increase (yet) in experiments).
20051210	Beginning the work on native dyntrans backends (by making a
		simple skeleton; so far only for Alpha hosts).
20051211	Some very minor SPARC updates.
20051215	Fixing a bug in the MIPS mul (note: not mult) instruction,
		so it also works with non-64-bit emulation. (Thanks to Alec
		Voropay for noticing the problem.)
20051216	More work on the fake/empty/simple/skeleton/whatever backend;
		performance doesn't increase, so this isn't really worth it,
		but it was probably worth it to prepare for a real backend
		later.
20051219	More instr call statistics gathering and analysis stuff.
20051220	Another fix for MIPS 'mul'. Also converting mul and {d,}cl{o,z}
		to dyntrans.
		memory_ppc.c syntax error fix (noticed by Peter Valchev).
		Beginning to move out machines from src/machine.c into
		individual files in src/machines (in a way similar to the
		autodev system for devices).
20051222	Updating the documentation regarding NetBSD/pmax 3.0.
20051223	- " - NetBSD/cats 3.0.
20051225	- " - NetBSD/hpcmips 3.0.
20051226	Continuing on the machine registry redesign.
		Adding support for ARM rrx (33-bit rotate).
		Fixing some signed/unsigned issues (exposed by gcc -W).
20051227	Fixing the bug which prevented a NetBSD/prep 3.0 install kernel
		from starting (triggered when an mtmsr was the last instruction
		on a page). Unfortunately not enough to get the kernel to run
		as well as the 2.1 kernels did.
20051230	Some dyntrans refactoring.
20051231	Continuing on the machine registry redesign.
20060101-10	Continuing... moving more machines. Moving MD interrupt stuff
		from machine.c into a new src/machines/interrupts.c.
20060114	Adding various mvmeppc machine skeletons.
20060115	Continuing on mvme* stuff. NetBSD/mvmeppc prints boot messages
		(for MVME1600) and reaches the root device prompt, but no
		specific hardware devices are emulated yet.
20060116	Minor updates to the mvme1600 emulation mode; the Eagle PCI bus
		seems to work without much modification, and a 21143 can be
		detected, interrupts might work (but untested so far).
		Adding a fake MK48Txx (mkclock) device, for NetBSD/mvmeppc.
20060121	Adding an aux control register for ARM. (A BIG thank you to
		Olivier Houchard for tracking down this bug.)
20060122	Adding more ARM instructions (smulXY), and dev_iq80321_7seg.
20060124	Adding disassembly of more ARM instructions (mia*, mra/mar),
		and some semi-bogus XScale and i80321 registers.
20060201-02	Various minor updates. Moving the last machines out of
		machine.c.
20060204	Adding a -c command line option, for running debugger commands
		before the simulation starts, but after all files have been
		loaded.
		Minor iq80321-related updates.
20060209	Minor hacks (DEVINIT macro, etc).
		Preparing for the generalization of the 64-bit dyntrans address
		translation subsystem.
20060216	Adding ARM ldrd (double-register load).
20060217	Continuing on various ARM-related stuff.
20060218	More progress on the ATA/wdc emulation for NetBSD/iq80321.
		NetBSD/evbarm can now be installed :-)  Updating the docs, etc.
		Continuing on Algor emulation.

==============  RELEASE 0.3.8  ==============


1 dpavlin 4 /*
2 dpavlin 22 * Copyright (C) 2003-2006 Anders Gavare. All rights reserved.
3 dpavlin 4 *
4     * Redistribution and use in source and binary forms, with or without
5     * modification, are permitted provided that the following conditions are met:
6     *
7     * 1. Redistributions of source code must retain the above copyright
8     * notice, this list of conditions and the following disclaimer.
9     * 2. Redistributions in binary form must reproduce the above copyright
10     * notice, this list of conditions and the following disclaimer in the
11     * documentation and/or other materials provided with the distribution.
12     * 3. The name of the author may not be used to endorse or promote products
13     * derived from this software without specific prior written permission.
14     *
15     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18     * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25     * SUCH DAMAGE.
26     *
27     *
28 dpavlin 22 * $Id: dev_bt459.c,v 1.63 2006/01/01 13:17:16 debug Exp $
29 dpavlin 4 *
30     * Brooktree 459 vdac, used by TURBOchannel graphics cards.
31     */
32    
33     #include <stdio.h>
34     #include <stdlib.h>
35     #include <string.h>
36    
37     #include "cpu.h"
38     #include "devices.h"
39     #include "machine.h"
40     #include "memory.h"
41     #include "misc.h"
42     #include "x11.h"
43    
44     #include "bt459.h"
45    
46    
47     #ifdef WITH_X11
48     #include <X11/Xlib.h>
49     #include <X11/Xutil.h>
50     #endif
51    
52     extern int quiet_mode;
53    
54    
55     /* #define BT459_DEBUG */
56     /* #define WITH_CURSOR_DEBUG */
57     #define BT459_TICK_SHIFT 14
58    
59     struct bt459_data {
60     uint32_t bt459_reg[DEV_BT459_NREGS];
61    
62     unsigned char cur_addr_hi;
63     unsigned char cur_addr_lo;
64    
65     int planes;
66     int type;
67    
68     int irq_nr;
69     int interrupts_enable;
70     int interrupt_time;
71     int interrupt_time_reset_value;
72    
73     int cursor_x_add;
74     int cursor_y_add;
75    
76     int need_to_redraw_whole_screen;
77    
78     int need_to_update_cursor_shape;
79     int cursor_on;
80     int cursor_x;
81     int cursor_y;
82     int cursor_xsize;
83     int cursor_ysize;
84    
85     int palette_sub_offset; /* 0, 1, or 2 */
86    
87     struct vfb_data *vfb_data;
88    
89     /*
90     * There is one pointer to the framebuffer's RGB palette,
91     * and then a local copy of the palette. 256 * 3 bytes (r,g,b).
92     * The reason for this is that when we need to blank the screen
93     * (ie video_on = 0), we can set the framebuffer's palette to all
94     * zeroes, but keep our own copy intact, to be reused later again
95     * when the screen is unblanked.
96     */
97     int video_on;
98     unsigned char *rgb_palette; /* 256 * 3 (r,g,b) */
99     unsigned char local_rgb_palette[256 * 3];
100     };
101    
102    
103     /*
104     * bt459_update_X_cursor():
105     *
106     * This routine takes the color values in the cursor RAM area, and put them
107     * in the framebuffer window's cursor_pixels.
108     *
109     * d->cursor_xsize and ysize are also updated.
110     */
111     static void bt459_update_X_cursor(struct cpu *cpu, struct bt459_data *d)
112     {
113     int i, x,y, xmax=0, ymax=0;
114     int bw_only = 1;
115    
116     /* First, let's calculate the size of the cursor: */
117     for (y=0; y<64; y++)
118     for (x=0; x<64; x+=4) {
119     int reg = BT459_REG_CRAM_BASE + y*16 + x/4;
120     unsigned char data = d->bt459_reg[reg];
121    
122     if (data)
123     ymax = y;
124    
125     for (i=0; i<4; i++) {
126     int color = (data >> (6-2*i)) & 3;
127     if (color != 0)
128     xmax = x + i;
129     if (color != 0 && color != 3)
130     bw_only = 0;
131     }
132     }
133    
134     d->cursor_xsize = xmax + 1;
135     d->cursor_ysize = ymax + 1;
136    
137     /*
138     * The 'bw_only' hack is because it is nicer to have the b/w
139     * text cursor invert whatever it is standing on, not just overwrite
140     * it with a big white box.
141     *
142     * The following seems to work with NetBSD/OpenBSD/Ultrix/Sprite:
143     * 0 = transparent, 1 and 2 = use the color specified by
144     * BT459_REG_CCOLOR_2, 3 = reverse of color 1/2.
145     */
146    
147     #ifdef WITH_X11
148     if (cpu->machine->use_x11 && d->vfb_data->fb_window != NULL) {
149     for (y=0; y<=ymax; y++) {
150     for (x=0; x<=xmax; x+=4) {
151     struct fb_window *win = d->vfb_data->fb_window;
152     int reg = BT459_REG_CRAM_BASE + y*16 + x/4;
153     unsigned char data = d->bt459_reg[reg];
154    
155     for (i=0; i<4; i++) {
156     int color = (data >> (6-2*i)) & 3;
157     int pixelvalue;
158    
159     if (bw_only) {
160     if (color)
161     pixelvalue =
162     CURSOR_COLOR_INVERT;
163     else
164     pixelvalue = 0;
165     } else {
166     pixelvalue =
167     CURSOR_COLOR_TRANSPARENT;
168     switch (color) {
169     case 1:
170     case 2: pixelvalue = (d->
171     bt459_reg[
172     BT459_REG_CCOLOR_2]
173     >> 4) & 0xf;
174     break;
175     case 3: pixelvalue = 15 -
176     ((d->bt459_reg[
177     BT459_REG_CCOLOR_2]
178     >> 4) & 0xf);
179     break;
180     }
181     }
182    
183     win->cursor_pixels[y][x+i] =
184     pixelvalue;
185     #ifdef WITH_CURSOR_DEBUG
186     printf("%i", color);
187     #endif
188     }
189     }
190     #ifdef WITH_CURSOR_DEBUG
191     printf("\n");
192     #endif
193     }
194     #ifdef WITH_CURSOR_DEBUG
195     printf("color 1,2,3 = 0x%02x, 0x%02x, 0x%02x\n",
196     d->bt459_reg[BT459_REG_CCOLOR_1],
197     d->bt459_reg[BT459_REG_CCOLOR_2],
198     d->bt459_reg[BT459_REG_CCOLOR_3]);
199     printf("\n");
200     #endif
201     /*
202     * Make sure the cursor is redrawn, if it is on:
203     *
204     * How does this work? Well, 0 is off, and non-zero is on,
205     * but if the old and new differ, the cursor is redrawn.
206     * (Hopefully this will "never" overflow.)
207     */
208     if (d->cursor_on)
209     d->cursor_on ++;
210     }
211     #endif
212     }
213    
214    
215     /*
216     * bt459_update_cursor_position():
217     */
218     static void bt459_update_cursor_position(struct bt459_data *d,
219     int old_cursor_on)
220     {
221     int new_cursor_x = (d->bt459_reg[BT459_REG_CXLO] & 255) +
222     ((d->bt459_reg[BT459_REG_CXHI] & 255) << 8) - d->cursor_x_add;
223     int new_cursor_y = (d->bt459_reg[BT459_REG_CYLO] & 255) +
224     ((d->bt459_reg[BT459_REG_CYHI] & 255) << 8) - d->cursor_y_add;
225    
226     if (new_cursor_x != d->cursor_x || new_cursor_y != d->cursor_y ||
227     d->cursor_on != old_cursor_on) {
228     int on;
229    
230     d->cursor_x = new_cursor_x;
231     d->cursor_y = new_cursor_y;
232    
233     if (!quiet_mode)
234     debug("[ bt459: cursor = %03i,%03i ]\n",
235     d->cursor_x, d->cursor_y);
236    
237     on = d->cursor_on;
238     if (d->cursor_xsize == 0 || d->cursor_ysize == 0)
239     on = 0;
240    
241     dev_fb_setcursor(d->vfb_data, d->cursor_x, d->cursor_y,
242     on, d->cursor_xsize, d->cursor_ysize);
243     }
244     }
245    
246    
247     /*
248     * dev_bt459_tick():
249     */
250     void dev_bt459_tick(struct cpu *cpu, void *extra)
251     {
252     struct bt459_data *d = extra;
253     int old_cursor_on = d->cursor_on;
254    
255     if (d->need_to_update_cursor_shape) {
256     d->need_to_update_cursor_shape = 0;
257     bt459_update_X_cursor(cpu, d);
258     bt459_update_cursor_position(d, old_cursor_on);
259     }
260    
261     if (d->need_to_redraw_whole_screen) {
262     d->vfb_data->update_x1 = 0;
263     d->vfb_data->update_x2 = d->vfb_data->xsize - 1;
264     d->vfb_data->update_y1 = 0;
265     d->vfb_data->update_y2 = d->vfb_data->ysize - 1;
266     d->need_to_redraw_whole_screen = 0;
267     }
268    
269     /*
270     * Vertical retrace interrupts. (This hack is kind of ugly.)
271     * Once every 'interrupt_time_reset_value', the interrupt is
272     * asserted. It is acked either manually (by someone reading
273     * a normal BT459 register or the Interrupt ack register),
274     * or after another tick has passed. (This is to prevent
275     * lockups from unhandled interrupts.)
276     */
277     if (d->type != BT459_PX && d->interrupts_enable && d->irq_nr > 0) {
278     d->interrupt_time --;
279     if (d->interrupt_time < 0) {
280     d->interrupt_time = d->interrupt_time_reset_value;
281     cpu_interrupt(cpu, d->irq_nr);
282     } else
283     cpu_interrupt_ack(cpu, d->irq_nr);
284     }
285     }
286    
287    
288     /*
289     * dev_bt459_irq_access():
290     */
291 dpavlin 22 DEVICE_ACCESS(bt459_irq)
292 dpavlin 4 {
293     struct bt459_data *d = (struct bt459_data *) extra;
294     uint64_t idata = 0, odata = 0;
295    
296 dpavlin 18 if (writeflag == MEM_WRITE)
297     idata = memory_readmax64(cpu, data, len);
298 dpavlin 4
299     #ifdef BT459_DEBUG
300     fatal("[ bt459: IRQ ack ]\n");
301     #endif
302    
303     d->interrupts_enable = 1;
304     if (d->irq_nr > 0)
305     cpu_interrupt_ack(cpu, d->irq_nr);
306    
307     if (writeflag == MEM_READ)
308     memory_writemax64(cpu, data, len, odata);
309    
310     return 1;
311     }
312    
313    
314     /*
315     * dev_bt459_access():
316     */
317 dpavlin 22 DEVICE_ACCESS(bt459)
318 dpavlin 4 {
319     struct bt459_data *d = (struct bt459_data *) extra;
320     uint64_t idata = 0, odata = 0;
321     int btaddr, old_cursor_on = d->cursor_on, modified;
322    
323     idata = memory_readmax64(cpu, data, len);
324    
325     #ifdef BT459_DEBUG
326     if (writeflag == MEM_WRITE)
327     fatal("[ bt459: write to addr 0x%02x: %08x ]\n",
328     (int)relative_addr, (int)idata);
329     #endif
330    
331     /*
332     * Vertical retrace interrupts are acked either by
333     * accessing a normal BT459 register, or the irq register,
334     * or by simply "missing" it.
335     */
336     if (d->irq_nr > 0)
337     cpu_interrupt_ack(cpu, d->irq_nr);
338    
339     /* ID register is read-only, should always be 0x4a or 0x4a4a4a: */
340     if (d->planes == 24)
341     d->bt459_reg[BT459_REG_ID] = 0x4a4a4a;
342     else {
343     /*
344     * TODO: Is it really 0x4a, or 0x4a0000?
345     * Ultrix panics with a "bad VDAC ID" message if 0x4a
346     * is returned.
347     */
348     d->bt459_reg[BT459_REG_ID] = 0x4a0000;
349     }
350    
351     btaddr = ((d->cur_addr_hi << 8) + d->cur_addr_lo) % DEV_BT459_NREGS;
352    
353     /* Read from/write to the bt459: */
354     switch (relative_addr) {
355     case 0x00: /* Low byte of address: */
356     if (writeflag == MEM_WRITE) {
357     if (!quiet_mode)
358     debug("[ bt459: write to Low Address Byte, "
359     "0x%02x ]\n", (int)idata);
360     d->cur_addr_lo = idata;
361     d->palette_sub_offset = 0;
362     } else {
363     odata = d->cur_addr_lo;
364     if (!quiet_mode)
365     debug("[ bt459: read from Low Address Byte: "
366     "0x%0x ]\n", (int)odata);
367     }
368     break;
369     case 0x04: /* High byte of address: */
370     if (writeflag == MEM_WRITE) {
371     if (!quiet_mode)
372     debug("[ bt459: write to High Address Byte, "
373     "0x%02x ]\n", (int)idata);
374     d->cur_addr_hi = idata;
375     d->palette_sub_offset = 0;
376     } else {
377     odata = d->cur_addr_hi;
378     if (!quiet_mode)
379     debug("[ bt459: read from High Address Byte: "
380     "0x%0x ]\n", (int)odata);
381     }
382     break;
383     case 0x08: /* Register access: */
384     if (writeflag == MEM_WRITE) {
385     if (!quiet_mode)
386     debug("[ bt459: write to BT459 register "
387     "0x%04x, value 0x%02x ]\n", btaddr,
388     (int)idata);
389     modified = (d->bt459_reg[btaddr] != idata);
390     d->bt459_reg[btaddr] = idata;
391    
392     switch (btaddr) {
393     case BT459_REG_CCOLOR_1:
394     case BT459_REG_CCOLOR_2:
395     case BT459_REG_CCOLOR_3:
396     if (modified)
397     d->need_to_update_cursor_shape = 1;
398     break;
399     case BT459_REG_PRM:
400     /*
401     * NetBSD writes 0x00 to this register to
402     * blank the screen (video off), and 0xff
403     * to turn the screen on.
404     */
405     switch (idata & 0xff) {
406     case 0: d->video_on = 0;
407     memset(d->rgb_palette, 0, 256*3);
408     d->need_to_redraw_whole_screen = 1;
409     debug("[ bt459: video OFF ]\n");
410     break;
411     default:d->video_on = 1;
412     memcpy(d->rgb_palette,
413     d->local_rgb_palette, 256*3);
414     d->need_to_redraw_whole_screen = 1;
415     debug("[ bt459: video ON ]\n");
416     }
417     break;
418     case BT459_REG_CCR:
419     /* Cursor control register: */
420     switch (idata & 0xff) {
421     case 0x00: d->cursor_on = 0; break;
422     case 0xc0:
423     case 0xc1: d->cursor_on = 1; break;
424     default:
425     fatal("[ bt459: unimplemented CCR "
426     "value 0x%08x ]\n", (int)idata);
427     }
428     if (modified)
429     d->need_to_update_cursor_shape = 1;
430     break;
431     default:
432     if (btaddr < 0x100)
433     fatal("[ bt459: write to BT459 "
434     "register 0x%04x, value 0x%02x ]\n",
435     btaddr, (int)idata);
436     }
437    
438     /* Write to cursor bitmap: */
439     if (btaddr >= BT459_REG_CRAM_BASE && modified)
440     d->need_to_update_cursor_shape = 1;
441     } else {
442     odata = d->bt459_reg[btaddr];
443    
444     /* Perhaps this hack is not necessary: */
445     if (btaddr == BT459_REG_ID && len==1)
446     odata = (odata >> 16) & 255;
447    
448     if (!quiet_mode)
449     debug("[ bt459: read from BT459 register "
450     "0x%04x, value 0x%02x ]\n", btaddr,
451     (int)odata);
452     }
453    
454     /* Go to next register: */
455     d->cur_addr_lo ++;
456     if (d->cur_addr_lo == 0)
457     d->cur_addr_hi ++;
458     break;
459     case 0xc: /* Color map: */
460     if (writeflag == MEM_WRITE) {
461     idata &= 255;
462     if (!quiet_mode)
463     debug("[ bt459: write to BT459 colormap "
464     "0x%04x subaddr %i, value 0x%02x ]\n",
465     btaddr, d->palette_sub_offset, (int)idata);
466    
467     if (btaddr < 0x100) {
468     if (d->video_on &&
469     d->local_rgb_palette[(btaddr & 0xff) * 3
470     + d->palette_sub_offset] != idata)
471     d->need_to_redraw_whole_screen = 1;
472    
473     /*
474     * Actually, the palette should only be
475     * updated after the third write,
476     * but this should probably work fine too:
477     */
478     d->local_rgb_palette[(btaddr & 0xff) * 3
479     + d->palette_sub_offset] = idata;
480    
481     if (d->video_on)
482     d->rgb_palette[(btaddr & 0xff) * 3
483     + d->palette_sub_offset] = idata;
484     }
485     } else {
486     if (btaddr < 0x100)
487     odata = d->local_rgb_palette[(btaddr & 0xff)
488     * 3 + d->palette_sub_offset];
489     if (!quiet_mode)
490     debug("[ bt459: read from BT459 colormap "
491     "0x%04x subaddr %i, value 0x%02x ]\n",
492     btaddr, d->palette_sub_offset, (int)odata);
493     }
494    
495     d->palette_sub_offset ++;
496     if (d->palette_sub_offset >= 3) {
497     d->palette_sub_offset = 0;
498    
499     d->cur_addr_lo ++;
500     if (d->cur_addr_lo == 0)
501     d->cur_addr_hi ++;
502     }
503    
504     break;
505     default:
506     if (writeflag == MEM_WRITE) {
507     debug("[ bt459: unimplemented write to address 0x%x, "
508     "data=0x%02x ]\n", (int)relative_addr, (int)idata);
509     } else {
510     debug("[ bt459: unimplemented read from address "
511     "0x%x ]\n", (int)relative_addr);
512     }
513     }
514    
515    
516     bt459_update_cursor_position(d, old_cursor_on);
517    
518     if (writeflag == MEM_READ)
519     memory_writemax64(cpu, data, len, odata);
520    
521     #ifdef BT459_DEBUG
522     if (writeflag == MEM_READ)
523     fatal("[ bt459: read from addr 0x%02x: %08x ]\n",
524     (int)relative_addr, (int)idata);
525     #endif
526    
527     return 1;
528     }
529    
530    
531     /*
532     * dev_bt459_init():
533     */
534     void dev_bt459_init(struct machine *machine, struct memory *mem,
535     uint64_t baseaddr, uint64_t baseaddr_irq, struct vfb_data *vfb_data,
536     int planes, int irq_nr, int type)
537     {
538     struct bt459_data *d = malloc(sizeof(struct bt459_data));
539     if (d == NULL) {
540     fprintf(stderr, "out of memory\n");
541     exit(1);
542     }
543    
544     memset(d, 0, sizeof(struct bt459_data));
545    
546     d->vfb_data = vfb_data;
547     d->rgb_palette = vfb_data->rgb_palette;
548     d->planes = planes;
549     d->irq_nr = irq_nr;
550     d->type = type;
551     d->cursor_x = -1;
552     d->cursor_y = -1;
553     d->cursor_xsize = d->cursor_ysize = 0; /* anything */
554     d->video_on = 1;
555    
556     /*
557     * These offsets are based on those mentioned in NetBSD,
558     * and then adjusted to look good with both NetBSD and
559     * Ultrix:
560     */
561     switch (d->type) {
562     case BT459_PX:
563     d->cursor_x_add = 370;
564     d->cursor_y_add = 37;
565     break;
566     case BT459_BA:
567     d->cursor_x_add = 220;
568     d->cursor_y_add = 35;
569     break;
570     case BT459_BBA:
571     if (vfb_data->xsize == 1280) {
572     /* 1280x1024: */
573     d->cursor_x_add = 368;
574     d->cursor_y_add = 38;
575     } else {
576     /* 1024x864: */
577     d->cursor_x_add = 220;
578     d->cursor_y_add = 35;
579     }
580     break;
581     }
582    
583     d->interrupt_time_reset_value = 500;
584    
585     memory_device_register(mem, "bt459", baseaddr, DEV_BT459_LENGTH,
586 dpavlin 20 dev_bt459_access, (void *)d, DM_DEFAULT, NULL);
587 dpavlin 4
588     if (baseaddr_irq != 0)
589     memory_device_register(mem, "bt459_irq", baseaddr_irq, 0x10000,
590 dpavlin 20 dev_bt459_irq_access, (void *)d, DM_DEFAULT, NULL);
591 dpavlin 4
592     machine_add_tickfunction(machine, dev_bt459_tick, d, BT459_TICK_SHIFT);
593     }
594    

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