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

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Revision 42 - (show annotations)
Mon Oct 8 16:22:32 2007 UTC (12 years, 4 months ago) by dpavlin
File MIME type: text/plain
File size: 15212 byte(s)
++ trunk/HISTORY	(local)
$Id: HISTORY,v 1.1613 2007/06/15 20:11:26 debug Exp $
20070501	Continuing a little on m88k disassembly (control registers,
		more instructions).
		Adding a dummy mvme88k machine mode.
20070502	Re-adding MIPS load/store alignment exceptions.
20070503	Implementing more of the M88K disassembly code.
20070504	Adding disassembly of some more M88K load/store instructions.
		Implementing some relatively simple M88K instructions (br.n,
		xor[.u] imm, and[.u] imm).
20070505	Implementing M88K three-register and, or, xor, and jmp[.n],
		bsr[.n] including function call trace stuff.
		Applying a patch from Bruce M. Simpson which implements the
		SYSCON_BOARD_CPU_CLOCK_FREQ_ID object of the syscon call in
		the yamon PROM emulation.
20070506	Implementing M88K bb0[.n] and bb1[.n], and skeletons for
		ldcr and stcr (although no control regs are implemented yet).
20070509	Found and fixed the bug which caused Linux for QEMU_MIPS to
		stop working in 0.4.5.1: It was a faulty change to the MIPS
		'sc' and 'scd' instructions I made while going through gcc -W
		warnings on 20070428.
20070510	Updating the Linux/QEMU_MIPS section in guestoses.html to
		use mips-test-0.2.tar.gz instead of 0.1.
		A big thank you to Miod Vallat for sending me M88K manuals.
		Implementing more M88K instructions (addu, subu, div[u], mulu,
		ext[u], clr, set, cmp).
20070511	Fixing bugs in the M88K "and" and "and.u" instructions (found
		by comparing against the manual).
		Implementing more M88K instructions (mask[.u], mak, bcnd (auto-
		generated)) and some more control register details.
		Cleanup: Removing the experimental AVR emulation mode and
		corresponding devices; AVR emulation wasn't really meaningful.
		Implementing autogeneration of most M88K loads/stores. The
		rectangle drawing demo (with -O0) for M88K runs :-)
		Beginning on M88K exception handling.
		More M88K instructions: tb0, tb1, rte, sub, jsr[.n].
		Adding some skeleton MVME PROM ("BUG") emulation.
20070512	Fixing a bug in the M88K cmp instruction.
		Adding the M88K lda (scaled register) instruction.
		Fixing bugs in 64-bit (32-bit pairs) M88K loads/stores.
		Removing the unused tick_hz stuff from the machine struct.
		Implementing the M88K xmem instruction. OpenBSD/mvme88k gets
		far enough to display the Copyright banner :-)
		Implementing subu.co (guess), addu.co, addu.ci, ff0, and ff1.
		Adding a dev_mvme187, for MVME187-specific devices/registers.
		OpenBSD/mvme88k prints more boot messages. :)
20070515	Continuing on MVME187 emulation (adding more devices, beginning
		on the CMMUs, etc).
		Adding the M88K and.c, xor.c, and or.c instructions, and making
		sure that mul, div, etc cause exceptions if executed when SFD1
		is disabled.
20070517	Continuing on M88K and MVME187 emulation in general; moving
		the CMMU registers to the CPU struct, separating dev_pcc2 from
		dev_mvme187, and beginning on memory_m88k.c (BATC and PATC).
		Fixing a bug in 64-bit (32-bit pairs) M88K fast stores.
		Implementing the clock part of dev_mk48txx.
		Implementing the M88K fstcr and xcr instructions.
		Implementing m88k_cpu_tlbdump().
		Beginning on the implementation of a separate address space
		for M88K .usr loads/stores.
20070520	Removing the non-working (skeleton) Sandpoint, SonyNEWS, SHARK
		Dnard, and Zaurus machine modes.
		Experimenting with dyntrans to_be_translated read-ahead. It
		seems to give a very small performance increase for MIPS
		emulation, but a large performance degradation for SuperH. Hm.
20070522	Disabling correct SuperH ITLB emulation; it does not seem to be
		necessary in order to let SH4 guest OSes run, and it slows down
		userspace code.
		Implementing "samepage" branches for SuperH emulation, and some
		other minor speed hacks.
20070525	Continuing on M88K memory-related stuff: exceptions, memory
		transaction register contents, etc.
		Implementing the M88K subu.ci instruction.
		Removing the non-working (skeleton) Iyonix machine mode.
		OpenBSD/mvme88k reaches userland :-), starts executing
		/sbin/init's instructions, and issues a few syscalls, before
		crashing.
20070526	Fixing bugs in dev_mk48txx, so that OpenBSD/mvme88k detects
		the correct time-of-day.
		Implementing a generic IRQ controller for the test machines
		(dev_irqc), similar to a proposed patch from Petr Stepan.
		Experimenting some more with translation read-ahead.
		Adding an "expect" script for automated OpenBSD/landisk
		install regression/performance tests.
20070527	Adding a dummy mmEye (SH3) machine mode skeleton.
		FINALLY found the strange M88K bug I have been hunting: I had
		not emulated the SNIP value for exceptions occurring in
		branch delay slots correctly.
		Implementing correct exceptions for 64-bit M88K loads/stores.
		Address to symbol lookups are now disabled when M88K is
		running in usermode (because usermode addresses don't have
		anything to do with supervisor addresses).
20070531	Removing the mmEye machine mode skeleton.
20070604	Some minor code cleanup.
20070605	Moving src/useremul.c into a subdir (src/useremul/), and
		cleaning up some more legacy constructs.
		Adding -Wstrict-aliasing and -fstrict-aliasing detection to
		the configure script.
20070606	Adding a check for broken GCC on Solaris to the configure
		script. (GCC 3.4.3 on Solaris cannot handle static variables
		which are initialized to 0 or NULL. :-/)
		Removing the old (non-working) ARC emulation modes: NEC RD94,
		R94, R96, and R98, and the last traces of Olivetti M700 and
		Deskstation Tyne.
		Removing the non-working skeleton WDSC device (dev_wdsc).
20070607	Thinking about how to use the host's cc + ld at runtime to
		generate native code. (See experiments/native_cc_ld_test.i
		for an example.)
20070608	Adding a program counter sampling timer, which could be useful
		for native code generation experiments.
		The KN02_CSR_NRMMOD bit in the DECstation 5000/200 (KN02) CSR
		should always be set, to allow a 5000/200 PROM to boot.
20070609	Moving out breakpoint details from the machine struct into
		a helper struct, and removing the limit on max nr of
		breakpoints.
20070610	Moving out tick functions into a helper struct as well (which
		also gets rid of the max limit).
20070612	FINALLY figured out why Debian/DECstation stopped working when
		translation read-ahead was enabled: in src/memory_rw.c, the
		call to invalidate_code_translation was made also if the
		memory access was an instruction load (if the page was mapped
		as writable); it shouldn't be called in that case.
20070613	Implementing some more MIPS32/64 revision 2 instructions: di,
		ei, ext, dext, dextm, dextu, and ins.
20070614	Implementing an instruction combination for the NetBSD/arm
		idle loop (making the host not use any cpu if NetBSD/arm
		inside the emulator is not using any cpu).
		Increasing the nr of ARM VPH entries from 128 to 384.
20070615	Removing the ENABLE_arch stuff from the configure script, so
		that all included architectures are included in both release
		and development builds.
		Moving memory related helper functions from misc.c to memory.c.
		Adding preliminary instructions for netbooting NetBSD/pmppc to
		guestoses.html; it doesn't work yet, there are weird timeouts.
		Beginning a total rewrite of the userland emulation modes
		(removing all emulation modes, beginning from scratch with
		NetBSD/MIPS and FreeBSD/Alpha only).
20070616	After fixing a bug in the DEC21143 NIC (the TDSTAT_OWN bit was
		only cleared for the last segment when transmitting, not all
		segments), NetBSD/pmppc boots with root-on-nfs without the
		timeouts. Updating guestoses.html.
		Removing the skeleton PSP (Playstation Portable) mode.
		Moving X11-related stuff in the machine struct into a helper
		struct.
		Cleanup of out-of-memory checks, to use a new CHECK_ALLOCATION
		macro (which prints a meaningful error message).
		Adding a COMMENT to each machine and device (for automagic
		.index comment generation).
		Doing regression testing for the next release.

==============  RELEASE 0.4.6  ==============


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 1.70 2007/06/15 18:44:19 debug Exp $
29 *
30 * COMMENT: Brooktree BT459, 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->x11_md.in_use && 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 = 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 DEVICE_ACCESS(bt459)
309 {
310 struct bt459_data *d = extra;
311 uint64_t idata = 0, odata = 0;
312 int btaddr, old_cursor_on = d->cursor_on, modified;
313
314 idata = memory_readmax64(cpu, data, len);
315
316 #ifdef BT459_DEBUG
317 if (writeflag == MEM_WRITE)
318 fatal("[ bt459: write to addr 0x%02x: %08x ]\n",
319 (int)relative_addr, (int)idata);
320 #endif
321
322 /*
323 * Vertical retrace interrupts are acked either by
324 * accessing a normal BT459 register, or the irq register,
325 * or by simply "missing" it.
326 */
327 INTERRUPT_DEASSERT(d->irq);
328
329 /* ID register is read-only, should always be 0x4a or 0x4a4a4a: */
330 if (d->planes == 24)
331 d->bt459_reg[BT459_REG_ID] = 0x4a4a4a;
332 else {
333 /*
334 * TODO: Is it really 0x4a, or 0x4a0000?
335 * Ultrix panics with a "bad VDAC ID" message if 0x4a
336 * is returned.
337 */
338 d->bt459_reg[BT459_REG_ID] = 0x4a0000;
339 }
340
341 btaddr = ((d->cur_addr_hi << 8) + d->cur_addr_lo) % DEV_BT459_NREGS;
342
343 /* Read from/write to the bt459: */
344 switch (relative_addr) {
345 case 0x00: /* Low byte of address: */
346 if (writeflag == MEM_WRITE) {
347 if (!quiet_mode)
348 debug("[ bt459: write to Low Address Byte, "
349 "0x%02x ]\n", (int)idata);
350 d->cur_addr_lo = idata;
351 d->palette_sub_offset = 0;
352 } else {
353 odata = d->cur_addr_lo;
354 if (!quiet_mode)
355 debug("[ bt459: read from Low Address Byte: "
356 "0x%0x ]\n", (int)odata);
357 }
358 break;
359 case 0x04: /* High byte of address: */
360 if (writeflag == MEM_WRITE) {
361 if (!quiet_mode)
362 debug("[ bt459: write to High Address Byte, "
363 "0x%02x ]\n", (int)idata);
364 d->cur_addr_hi = idata;
365 d->palette_sub_offset = 0;
366 } else {
367 odata = d->cur_addr_hi;
368 if (!quiet_mode)
369 debug("[ bt459: read from High Address Byte: "
370 "0x%0x ]\n", (int)odata);
371 }
372 break;
373 case 0x08: /* Register access: */
374 if (writeflag == MEM_WRITE) {
375 if (!quiet_mode)
376 debug("[ bt459: write to BT459 register "
377 "0x%04x, value 0x%02x ]\n", btaddr,
378 (int)idata);
379 modified = (d->bt459_reg[btaddr] != idata);
380 d->bt459_reg[btaddr] = idata;
381
382 switch (btaddr) {
383 case BT459_REG_CCOLOR_1:
384 case BT459_REG_CCOLOR_2:
385 case BT459_REG_CCOLOR_3:
386 if (modified)
387 d->need_to_update_cursor_shape = 1;
388 break;
389 case BT459_REG_PRM:
390 /*
391 * NetBSD writes 0x00 to this register to
392 * blank the screen (video off), and 0xff
393 * to turn the screen on.
394 */
395 switch (idata & 0xff) {
396 case 0: d->video_on = 0;
397 memset(d->rgb_palette, 0, 256*3);
398 d->need_to_redraw_whole_screen = 1;
399 debug("[ bt459: video OFF ]\n");
400 break;
401 default:d->video_on = 1;
402 memcpy(d->rgb_palette,
403 d->local_rgb_palette, 256*3);
404 d->need_to_redraw_whole_screen = 1;
405 debug("[ bt459: video ON ]\n");
406 }
407 break;
408 case BT459_REG_CCR:
409 /* Cursor control register: */
410 switch (idata & 0xff) {
411 case 0x00: d->cursor_on = 0; break;
412 case 0xc0:
413 case 0xc1: d->cursor_on = 1; break;
414 default:
415 fatal("[ bt459: unimplemented CCR "
416 "value 0x%08x ]\n", (int)idata);
417 }
418 if (modified)
419 d->need_to_update_cursor_shape = 1;
420 break;
421 default:
422 if (btaddr < 0x100)
423 fatal("[ bt459: write to BT459 "
424 "register 0x%04x, value 0x%02x ]\n",
425 btaddr, (int)idata);
426 }
427
428 /* Write to cursor bitmap: */
429 if (btaddr >= BT459_REG_CRAM_BASE && modified)
430 d->need_to_update_cursor_shape = 1;
431 } else {
432 odata = d->bt459_reg[btaddr];
433
434 /* Perhaps this hack is not necessary: */
435 if (btaddr == BT459_REG_ID && len==1)
436 odata = (odata >> 16) & 255;
437
438 if (!quiet_mode)
439 debug("[ bt459: read from BT459 register "
440 "0x%04x, value 0x%02x ]\n", btaddr,
441 (int)odata);
442 }
443
444 /* Go to next register: */
445 d->cur_addr_lo ++;
446 if (d->cur_addr_lo == 0)
447 d->cur_addr_hi ++;
448 break;
449 case 0xc: /* Color map: */
450 if (writeflag == MEM_WRITE) {
451 idata &= 255;
452 if (!quiet_mode)
453 debug("[ bt459: write to BT459 colormap "
454 "0x%04x subaddr %i, value 0x%02x ]\n",
455 btaddr, d->palette_sub_offset, (int)idata);
456
457 if (btaddr < 0x100) {
458 if (d->video_on &&
459 d->local_rgb_palette[(btaddr & 0xff) * 3
460 + d->palette_sub_offset] != idata)
461 d->need_to_redraw_whole_screen = 1;
462
463 /*
464 * Actually, the palette should only be
465 * updated after the third write,
466 * but this should probably work fine too:
467 */
468 d->local_rgb_palette[(btaddr & 0xff) * 3
469 + d->palette_sub_offset] = idata;
470
471 if (d->video_on)
472 d->rgb_palette[(btaddr & 0xff) * 3
473 + d->palette_sub_offset] = idata;
474 }
475 } else {
476 if (btaddr < 0x100)
477 odata = d->local_rgb_palette[(btaddr & 0xff)
478 * 3 + d->palette_sub_offset];
479 if (!quiet_mode)
480 debug("[ bt459: read from BT459 colormap "
481 "0x%04x subaddr %i, value 0x%02x ]\n",
482 btaddr, d->palette_sub_offset, (int)odata);
483 }
484
485 d->palette_sub_offset ++;
486 if (d->palette_sub_offset >= 3) {
487 d->palette_sub_offset = 0;
488
489 d->cur_addr_lo ++;
490 if (d->cur_addr_lo == 0)
491 d->cur_addr_hi ++;
492 }
493
494 break;
495 default:
496 if (writeflag == MEM_WRITE) {
497 debug("[ bt459: unimplemented write to address 0x%x, "
498 "data=0x%02x ]\n", (int)relative_addr, (int)idata);
499 } else {
500 debug("[ bt459: unimplemented read from address "
501 "0x%x ]\n", (int)relative_addr);
502 }
503 }
504
505
506 bt459_update_cursor_position(d, old_cursor_on);
507
508 if (writeflag == MEM_READ)
509 memory_writemax64(cpu, data, len, odata);
510
511 #ifdef BT459_DEBUG
512 if (writeflag == MEM_READ)
513 fatal("[ bt459: read from addr 0x%02x: %08x ]\n",
514 (int)relative_addr, (int)idata);
515 #endif
516
517 return 1;
518 }
519
520
521 /*
522 * dev_bt459_init():
523 */
524 void dev_bt459_init(struct machine *machine, struct memory *mem,
525 uint64_t baseaddr, uint64_t baseaddr_irq, struct vfb_data *vfb_data,
526 int planes, char *irq_path, int type)
527 {
528 struct bt459_data *d;
529
530 CHECK_ALLOCATION(d = malloc(sizeof(struct bt459_data)));
531 memset(d, 0, sizeof(struct bt459_data));
532
533 INTERRUPT_CONNECT(irq_path, d->irq);
534
535 d->vfb_data = vfb_data;
536 d->rgb_palette = vfb_data->rgb_palette;
537 d->planes = planes;
538 d->type = type;
539 d->cursor_x = -1;
540 d->cursor_y = -1;
541 d->cursor_xsize = d->cursor_ysize = 0; /* anything */
542 d->video_on = 1;
543
544 /*
545 * These offsets are based on those mentioned in NetBSD,
546 * and then adjusted to look good with both NetBSD and
547 * Ultrix:
548 */
549 switch (d->type) {
550 case BT459_PX:
551 d->cursor_x_add = 370;
552 d->cursor_y_add = 37;
553 break;
554 case BT459_BA:
555 d->cursor_x_add = 220;
556 d->cursor_y_add = 35;
557 break;
558 case BT459_BBA:
559 if (vfb_data->xsize == 1280) {
560 /* 1280x1024: */
561 d->cursor_x_add = 368;
562 d->cursor_y_add = 38;
563 } else {
564 /* 1024x864: */
565 d->cursor_x_add = 220;
566 d->cursor_y_add = 35;
567 }
568 break;
569 }
570
571 d->interrupt_time_reset_value = 500;
572
573 memory_device_register(mem, "bt459", baseaddr, DEV_BT459_LENGTH,
574 dev_bt459_access, (void *)d, DM_DEFAULT, NULL);
575
576 if (baseaddr_irq != 0)
577 memory_device_register(mem, "bt459_irq", baseaddr_irq, 0x10000,
578 dev_bt459_irq_access, (void *)d, DM_DEFAULT, NULL);
579
580 machine_add_tickfunction(machine, dev_bt459_tick, d,
581 BT459_TICK_SHIFT);
582 }
583

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