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

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Revision 34 - (show annotations)
Mon Oct 8 16:21:17 2007 UTC (16 years, 6 months ago) by dpavlin
File MIME type: text/plain
File size: 15329 byte(s)
++ trunk/HISTORY	(local)
$Id: HISTORY,v 1.1480 2007/02/19 01:34:42 debug Exp $
20061029	Changing usleep(1) calls in the debugger to usleep(10000)
20061107	Adding a new disk image option (-d o...) which sets the ISO9660
		filesystem base offset; also making some other hacks to allow
		NetBSD/dreamcast and homebrew demos/games to boot directly
		from a filesystem image.
		Moving Dreamcast-specific stuff in the documentation to its
		own page (dreamcast.html).
		Adding a border to the Dreamcast PVR framebuffer.
20061108	Adding a -T command line option (again?), for halting the
		emulator on unimplemented memory accesses.
20061109	Continuing on various SH4 and Dreamcast related things.
		The emulator should now halt on more unimplemented device
		accesses, instead of just printing a warning, forcing me to
		actually implement missing stuff :)
20061111	Continuing on SH4 and Dreamcast stuff.
		Adding a bogus Landisk (SH4) machine mode.
20061112	Implementing some parts of the Dreamcast GDROM device. With
		some ugly hacks, NetBSD can (barely) mount an ISO image.
20061113	NetBSD/dreamcast now starts booting from the Live CD image,
		but crashes randomly quite early on in the boot process.
20061122	Beginning on a skeleton interrupt.h and interrupt.c for the
		new interrupt subsystem.
20061124	Continuing on the new interrupt system; taking the first steps
		to attempt to connect CPUs (SuperH and MIPS) and devices
		(dev_cons and SH4 timer interrupts) to it. Many things will
		probably break from now on.
20061125	Converting dev_ns16550, dev_8253 to the new interrupt system.
		Attempting to begin to convert the ISA bus.
20061130	Incorporating a patch from Brian Foley for the configure
		script, which checks for X11 libs in /usr/X11R6/lib64 (which
		is used on some Linux systems).
20061227	Adding a note in the man page about booting from Dreamcast
		CDROM images (i.e. that no external kernel is needed).
20061229	Continuing on the interrupt system rewrite: beginning to
		convert more devices, adding abort() calls for legacy interrupt
		system calls so that everything now _has_ to be rewritten!
		Almost all machine modes are now completely broken.
20061230	More progress on removing old interrupt code, mostly related
		to the ISA bus + devices, the LCA bus (on AlphaBook1), and
		the Footbridge bus (for CATS). And some minor PCI stuff.
		Connecting the ARM cpu to the new interrupt system.
		The CATS, NetWinder, and QEMU_MIPS machine modes now work with
		the new interrupt system :)
20061231	Connecting PowerPC CPUs to the new interrupt system.
		Making PReP machines (IBM 6050) work again.
		Beginning to convert the GT PCI controller (for e.g. Malta
		and Cobalt emulation). Some things work, but not everything.
		Updating Copyright notices for 2007.
20070101	Converting dev_kn02 from legacy style to devinit; the 3max
		machine mode now works with the new interrupt system :-]
20070105	Beginning to convert the SGI O2 machine to the new interrupt
		system; finally converting O2 (IP32) devices to devinit, etc.
20070106	Continuing on the interrupt system redesign/rewrite; KN01
		(PMAX), KN230, and Dreamcast ASIC interrupts should work again,
		moving out stuff from machine.h and devices.h into the
		corresponding devices, beginning the rewrite of i80321
		interrupts, etc.
20070107	Beginning on the rewrite of Eagle interrupt stuff (PReP, etc).
20070117	Beginning the rewrite of Algor (V3) interrupts (finally
		changing dev_v3 into devinit style).
20070118	Removing the "bus" registry concept from machine.h, because
		it was practically meaningless.
		Continuing on the rewrite of Algor V3 ISA interrupts.
20070121	More work on Algor interrupts; they are now working again,
		well enough to run NetBSD/algor. :-)
20070122	Converting VR41xx (HPCmips) interrupts. NetBSD/hpcmips
		can be installed using the new interrupt system :-)
20070123	Making the testmips mode work with the new interrupt system.
20070127	Beginning to convert DEC5800 devices to devinit, and to the
		new interrupt system.
		Converting Playstation 2 devices to devinit, and converting
		the interrupt system. Also fixing a severe bug: the interrupt
		mask register on Playstation 2 is bitwise _toggled_ on writes.
20070128	Removing the dummy NetGear machine mode and the 8250 device
		(which was only used by the NetGear machine).
		Beginning to convert the MacPPC GC (Grand Central) interrupt
		controller to the new interrupt system.
		Converting Jazz interrupts (PICA61 etc.) to the new interrupt
		system. NetBSD/arc can be installed again :-)
		Fixing the JAZZ timer (hardcoding it at 100 Hz, works with
		NetBSD and it is better than a completely dummy timer as it
		was before).
		Converting dev_mp to the new interrupt system, although I
		haven't had time to actually test it yet.
		Completely removing src/machines/interrupts.c, cpu_interrupt
		and cpu_interrupt_ack in src/cpu.c, and
		src/include/machine_interrupts.h! Adding fatal error messages
		+ abort() in the few places that are left to fix.
		Converting dev_z8530 to the new interrupt system.
		FINALLY removing the md_int struct completely from the
		machine struct.
		SH4 fixes (adding a PADDR invalidation in the ITLB replacement
		code in memory_sh.c); the NetBSD/dreamcast LiveCD now runs
		all the way to the login prompt, and can be interacted with :-)
		Converting the CPC700 controller (PCI and interrupt controller
		for PM/PPC) to the new interrupt system.
20070129	Fixing MACE ISA interrupts (SGI IP32 emulation). Both NetBSD/
		sgimips' and OpenBSD/sgi's ramdisk kernels can now be
		interacted with again.
20070130	Moving out the MIPS multi_lw and _sw instruction combinations
		so that they are auto-generated at compile time instead.
20070131	Adding detection of amd64/x86_64 hosts in the configure script,
		for doing initial experiments (again :-) with native code
		generation.
		Adding a -k command line option to set the size of the dyntrans
		cache, and a -B command line option to disable native code
		generation, even if GXemul was compiled with support for
		native code generation for the specific host CPU architecture.
20070201	Experimenting with a skeleton for native code generation.
		Changing the default behaviour, so that native code generation
		is now disabled by default, and has to be enabled by using
		-b on the command line.
20070202	Continuing the native code generation experiments.
		Making PCI interrupts work for Footbridge again.
20070203	More native code generation experiments.
		Removing most of the native code generation experimental code,
		it does not make sense to include any quick hacks like this.
		Minor cleanup/removal of some more legacy MIPS interrupt code.
20070204	Making i80321 interrupts work again (for NetBSD/evbarm etc.),
		and fixing the timer at 100 Hz.
20070206	Experimenting with removing the wdc interrupt slowness hack.
20070207	Lowering the number of dyntrans TLB entries for MIPS from
		192 to 128, resulting in a minor speed improvement.
		Minor optimization to the code invalidation routine in
		cpu_dyntrans.c.
20070208	Increasing (experimentally) the nr of dyntrans instructions per
		loop from 60 to 120.
20070210	Commenting out (experimentally) the dyntrans_device_danger
		detection in memory_rw.c.
		Changing the testmips and baremips machines to use a revision 2
		MIPS64 CPU by default, instead of revision 1.
		Removing the dummy i960, IA64, x86, AVR32, and HP PA-RISC
		files, the PC bios emulation, and the Olivetti M700 (ARC) and
		db64360 emulation modes.
20070211	Adding an "mp" demo to the demos directory, which tests the
		SMP functionality of the testmips machine.
		Fixing PReP interrupts some more. NetBSD/prep now boots again.
20070216	Adding a "nop workaround" for booting Mach/PMAX to the
		documentation; thanks to Artur Bujdoso for the values.
		Converting more of the MacPPC interrupt stuff to the new
		system.
		Beginning to convert BeBox interrupts to the new system.
		PPC603e should NOT have the PPC_NO_DEC flag! Removing it.
		Correcting BeBox clock speed (it was set to 100 in the NetBSD
		bootinfo block, but should be 33000000/4), allowing NetBSD
		to start without using the (incorrect) PPC_NO_DEC hack.
20070217	Implementing (slow) AltiVec vector loads and stores, allowing
		NetBSD/macppc to finally boot using the GENERIC kernel :-)
		Updating the documentation with install instructions for
		NetBSD/macppc.
20070218-19	Regression testing for the release.

==============  RELEASE 0.4.4  ==============


1 /*
2 * Copyright (C) 2003-2007 Anders Gavare. All rights reserved.
3 *
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 * $Id: dev_bt459.c,v 1.67 2006/12/30 13:30:57 debug Exp $
29 *
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 struct interrupt irq;
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 DEVICE_TICK(bt459)
248 {
249 struct bt459_data *d = extra;
250 int old_cursor_on = d->cursor_on;
251
252 if (d->need_to_update_cursor_shape) {
253 d->need_to_update_cursor_shape = 0;
254 bt459_update_X_cursor(cpu, d);
255 bt459_update_cursor_position(d, old_cursor_on);
256 }
257
258 if (d->need_to_redraw_whole_screen) {
259 d->vfb_data->update_x1 = 0;
260 d->vfb_data->update_x2 = d->vfb_data->xsize - 1;
261 d->vfb_data->update_y1 = 0;
262 d->vfb_data->update_y2 = d->vfb_data->ysize - 1;
263 d->need_to_redraw_whole_screen = 0;
264 }
265
266 /*
267 * Vertical retrace interrupts. (This hack is kind of ugly.)
268 * Once every 'interrupt_time_reset_value', the interrupt is
269 * asserted. It is acked either manually (by someone reading
270 * a normal BT459 register or the Interrupt ack register),
271 * or after another tick has passed. (This is to prevent
272 * lockups from unhandled interrupts.)
273 */
274 if (d->type != BT459_PX && d->interrupts_enable) {
275 d->interrupt_time --;
276 if (d->interrupt_time < 0) {
277 d->interrupt_time = d->interrupt_time_reset_value;
278 INTERRUPT_ASSERT(d->irq);
279 } else
280 INTERRUPT_DEASSERT(d->irq);
281 }
282 }
283
284
285 DEVICE_ACCESS(bt459_irq)
286 {
287 struct bt459_data *d = (struct bt459_data *) extra;
288 uint64_t idata = 0, odata = 0;
289
290 if (writeflag == MEM_WRITE)
291 idata = memory_readmax64(cpu, data, len);
292
293 #ifdef BT459_DEBUG
294 fatal("[ bt459: IRQ ack ]\n");
295 #endif
296
297 d->interrupts_enable = 1;
298
299 INTERRUPT_DEASSERT(d->irq);
300
301 if (writeflag == MEM_READ)
302 memory_writemax64(cpu, data, len, odata);
303
304 return 1;
305 }
306
307
308 /*
309 * dev_bt459_access():
310 */
311 DEVICE_ACCESS(bt459)
312 {
313 struct bt459_data *d = (struct bt459_data *) extra;
314 uint64_t idata = 0, odata = 0;
315 int btaddr, old_cursor_on = d->cursor_on, modified;
316
317 idata = memory_readmax64(cpu, data, len);
318
319 #ifdef BT459_DEBUG
320 if (writeflag == MEM_WRITE)
321 fatal("[ bt459: write to addr 0x%02x: %08x ]\n",
322 (int)relative_addr, (int)idata);
323 #endif
324
325 /*
326 * Vertical retrace interrupts are acked either by
327 * accessing a normal BT459 register, or the irq register,
328 * or by simply "missing" it.
329 */
330 INTERRUPT_DEASSERT(d->irq);
331
332 /* ID register is read-only, should always be 0x4a or 0x4a4a4a: */
333 if (d->planes == 24)
334 d->bt459_reg[BT459_REG_ID] = 0x4a4a4a;
335 else {
336 /*
337 * TODO: Is it really 0x4a, or 0x4a0000?
338 * Ultrix panics with a "bad VDAC ID" message if 0x4a
339 * is returned.
340 */
341 d->bt459_reg[BT459_REG_ID] = 0x4a0000;
342 }
343
344 btaddr = ((d->cur_addr_hi << 8) + d->cur_addr_lo) % DEV_BT459_NREGS;
345
346 /* Read from/write to the bt459: */
347 switch (relative_addr) {
348 case 0x00: /* Low byte of address: */
349 if (writeflag == MEM_WRITE) {
350 if (!quiet_mode)
351 debug("[ bt459: write to Low Address Byte, "
352 "0x%02x ]\n", (int)idata);
353 d->cur_addr_lo = idata;
354 d->palette_sub_offset = 0;
355 } else {
356 odata = d->cur_addr_lo;
357 if (!quiet_mode)
358 debug("[ bt459: read from Low Address Byte: "
359 "0x%0x ]\n", (int)odata);
360 }
361 break;
362 case 0x04: /* High byte of address: */
363 if (writeflag == MEM_WRITE) {
364 if (!quiet_mode)
365 debug("[ bt459: write to High Address Byte, "
366 "0x%02x ]\n", (int)idata);
367 d->cur_addr_hi = idata;
368 d->palette_sub_offset = 0;
369 } else {
370 odata = d->cur_addr_hi;
371 if (!quiet_mode)
372 debug("[ bt459: read from High Address Byte: "
373 "0x%0x ]\n", (int)odata);
374 }
375 break;
376 case 0x08: /* Register access: */
377 if (writeflag == MEM_WRITE) {
378 if (!quiet_mode)
379 debug("[ bt459: write to BT459 register "
380 "0x%04x, value 0x%02x ]\n", btaddr,
381 (int)idata);
382 modified = (d->bt459_reg[btaddr] != idata);
383 d->bt459_reg[btaddr] = idata;
384
385 switch (btaddr) {
386 case BT459_REG_CCOLOR_1:
387 case BT459_REG_CCOLOR_2:
388 case BT459_REG_CCOLOR_3:
389 if (modified)
390 d->need_to_update_cursor_shape = 1;
391 break;
392 case BT459_REG_PRM:
393 /*
394 * NetBSD writes 0x00 to this register to
395 * blank the screen (video off), and 0xff
396 * to turn the screen on.
397 */
398 switch (idata & 0xff) {
399 case 0: d->video_on = 0;
400 memset(d->rgb_palette, 0, 256*3);
401 d->need_to_redraw_whole_screen = 1;
402 debug("[ bt459: video OFF ]\n");
403 break;
404 default:d->video_on = 1;
405 memcpy(d->rgb_palette,
406 d->local_rgb_palette, 256*3);
407 d->need_to_redraw_whole_screen = 1;
408 debug("[ bt459: video ON ]\n");
409 }
410 break;
411 case BT459_REG_CCR:
412 /* Cursor control register: */
413 switch (idata & 0xff) {
414 case 0x00: d->cursor_on = 0; break;
415 case 0xc0:
416 case 0xc1: d->cursor_on = 1; break;
417 default:
418 fatal("[ bt459: unimplemented CCR "
419 "value 0x%08x ]\n", (int)idata);
420 }
421 if (modified)
422 d->need_to_update_cursor_shape = 1;
423 break;
424 default:
425 if (btaddr < 0x100)
426 fatal("[ bt459: write to BT459 "
427 "register 0x%04x, value 0x%02x ]\n",
428 btaddr, (int)idata);
429 }
430
431 /* Write to cursor bitmap: */
432 if (btaddr >= BT459_REG_CRAM_BASE && modified)
433 d->need_to_update_cursor_shape = 1;
434 } else {
435 odata = d->bt459_reg[btaddr];
436
437 /* Perhaps this hack is not necessary: */
438 if (btaddr == BT459_REG_ID && len==1)
439 odata = (odata >> 16) & 255;
440
441 if (!quiet_mode)
442 debug("[ bt459: read from BT459 register "
443 "0x%04x, value 0x%02x ]\n", btaddr,
444 (int)odata);
445 }
446
447 /* Go to next register: */
448 d->cur_addr_lo ++;
449 if (d->cur_addr_lo == 0)
450 d->cur_addr_hi ++;
451 break;
452 case 0xc: /* Color map: */
453 if (writeflag == MEM_WRITE) {
454 idata &= 255;
455 if (!quiet_mode)
456 debug("[ bt459: write to BT459 colormap "
457 "0x%04x subaddr %i, value 0x%02x ]\n",
458 btaddr, d->palette_sub_offset, (int)idata);
459
460 if (btaddr < 0x100) {
461 if (d->video_on &&
462 d->local_rgb_palette[(btaddr & 0xff) * 3
463 + d->palette_sub_offset] != idata)
464 d->need_to_redraw_whole_screen = 1;
465
466 /*
467 * Actually, the palette should only be
468 * updated after the third write,
469 * but this should probably work fine too:
470 */
471 d->local_rgb_palette[(btaddr & 0xff) * 3
472 + d->palette_sub_offset] = idata;
473
474 if (d->video_on)
475 d->rgb_palette[(btaddr & 0xff) * 3
476 + d->palette_sub_offset] = idata;
477 }
478 } else {
479 if (btaddr < 0x100)
480 odata = d->local_rgb_palette[(btaddr & 0xff)
481 * 3 + d->palette_sub_offset];
482 if (!quiet_mode)
483 debug("[ bt459: read from BT459 colormap "
484 "0x%04x subaddr %i, value 0x%02x ]\n",
485 btaddr, d->palette_sub_offset, (int)odata);
486 }
487
488 d->palette_sub_offset ++;
489 if (d->palette_sub_offset >= 3) {
490 d->palette_sub_offset = 0;
491
492 d->cur_addr_lo ++;
493 if (d->cur_addr_lo == 0)
494 d->cur_addr_hi ++;
495 }
496
497 break;
498 default:
499 if (writeflag == MEM_WRITE) {
500 debug("[ bt459: unimplemented write to address 0x%x, "
501 "data=0x%02x ]\n", (int)relative_addr, (int)idata);
502 } else {
503 debug("[ bt459: unimplemented read from address "
504 "0x%x ]\n", (int)relative_addr);
505 }
506 }
507
508
509 bt459_update_cursor_position(d, old_cursor_on);
510
511 if (writeflag == MEM_READ)
512 memory_writemax64(cpu, data, len, odata);
513
514 #ifdef BT459_DEBUG
515 if (writeflag == MEM_READ)
516 fatal("[ bt459: read from addr 0x%02x: %08x ]\n",
517 (int)relative_addr, (int)idata);
518 #endif
519
520 return 1;
521 }
522
523
524 /*
525 * dev_bt459_init():
526 */
527 void dev_bt459_init(struct machine *machine, struct memory *mem,
528 uint64_t baseaddr, uint64_t baseaddr_irq, struct vfb_data *vfb_data,
529 int planes, char *irq_path, int type)
530 {
531 struct bt459_data *d = malloc(sizeof(struct bt459_data));
532 if (d == NULL) {
533 fprintf(stderr, "out of memory\n");
534 exit(1);
535 }
536
537 memset(d, 0, sizeof(struct bt459_data));
538
539 INTERRUPT_CONNECT(irq_path, d->irq);
540
541 d->vfb_data = vfb_data;
542 d->rgb_palette = vfb_data->rgb_palette;
543 d->planes = planes;
544 d->type = type;
545 d->cursor_x = -1;
546 d->cursor_y = -1;
547 d->cursor_xsize = d->cursor_ysize = 0; /* anything */
548 d->video_on = 1;
549
550 /*
551 * These offsets are based on those mentioned in NetBSD,
552 * and then adjusted to look good with both NetBSD and
553 * Ultrix:
554 */
555 switch (d->type) {
556 case BT459_PX:
557 d->cursor_x_add = 370;
558 d->cursor_y_add = 37;
559 break;
560 case BT459_BA:
561 d->cursor_x_add = 220;
562 d->cursor_y_add = 35;
563 break;
564 case BT459_BBA:
565 if (vfb_data->xsize == 1280) {
566 /* 1280x1024: */
567 d->cursor_x_add = 368;
568 d->cursor_y_add = 38;
569 } else {
570 /* 1024x864: */
571 d->cursor_x_add = 220;
572 d->cursor_y_add = 35;
573 }
574 break;
575 }
576
577 d->interrupt_time_reset_value = 500;
578
579 memory_device_register(mem, "bt459", baseaddr, DEV_BT459_LENGTH,
580 dev_bt459_access, (void *)d, DM_DEFAULT, NULL);
581
582 if (baseaddr_irq != 0)
583 memory_device_register(mem, "bt459_irq", baseaddr_irq, 0x10000,
584 dev_bt459_irq_access, (void *)d, DM_DEFAULT, NULL);
585
586 machine_add_tickfunction(machine, dev_bt459_tick, d,
587 BT459_TICK_SHIFT, 0.0);
588 }
589

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