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

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Revision 22 - (show annotations)
Mon Oct 8 16:19:37 2007 UTC (16 years, 6 months ago) by dpavlin
File MIME type: text/plain
File size: 12513 byte(s)
++ 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 /*
2 * Copyright (C) 2003-2006 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_sgi_gbe.c,v 1.32 2006/01/01 13:17:17 debug Exp $
29 *
30 * SGI "gbe", graphics controller. Framebuffer.
31 * Loosely inspired by Linux code.
32 */
33
34 #include <stdio.h>
35 #include <stdlib.h>
36 #include <string.h>
37
38 #include "console.h"
39 #include "cpu.h"
40 #include "devices.h"
41 #include "machine.h"
42 #include "memory.h"
43 #include "misc.h"
44
45
46 /* Let's hope nothing is there already... */
47 #define FAKE_GBE_FB_ADDRESS 0x38000000
48
49 #define GBE_DEBUG
50 /* #define debug fatal */
51
52 #define MTE_TEST
53
54 #define GBE_DEFAULT_XRES 640
55 #define GBE_DEFAULT_YRES 480
56
57
58 struct sgi_gbe_data {
59 int xres, yres;
60
61 uint32_t control; /* 0x00000 */
62 uint32_t dotclock; /* 0x00004 */
63 uint32_t i2c; /* 0x00008 */
64 uint32_t i2cfp; /* 0x00010 */
65 uint32_t plane0ctrl; /* 0x30000 */
66 uint32_t frm_control; /* 0x3000c */
67 int freeze;
68
69 int bitdepth;
70 struct vfb_data *fb_data;
71 };
72
73
74 /*
75 * dev_sgi_gbe_tick():
76 *
77 * Every now and then, copy data from the framebuffer in normal ram
78 * to the actual framebuffer (which will then redraw the window).
79 * TODO: This is utterly slow, even slower than the normal framebuffer
80 * which is really slow as it is.
81 *
82 * frm_control (bits 31..9) is a pointer to an array of uint16_t.
83 * These numbers (when << 16 bits) are pointers to the tiles. Tiles are
84 * 512x128 in 8-bit mode, 256x128 in 16-bit mode, and 128x128 in 32-bit mode.
85 */
86 void dev_sgi_gbe_tick(struct cpu *cpu, void *extra)
87 {
88 struct sgi_gbe_data *d = extra;
89 int tile_nr = 0, on_screen = 1, xbase = 0, ybase = 0;
90 unsigned char tileptr_buf[sizeof(uint16_t)];
91 uint64_t tileptr, tiletable;
92 int lines_to_copy, pixels_per_line, y;
93 unsigned char buf[16384]; /* must be power of 2, at most 65536 */
94 int copy_len, copy_offset;
95 uint64_t old_fb_offset = 0;
96 int tweaked = 1;
97
98 #ifdef MTE_TEST
99 return;
100 #endif
101
102 /* debug("[ sgi_gbe: dev_sgi_gbe_tick() ]\n"); */
103
104 tiletable = (d->frm_control & 0xfffffe00);
105 if (tiletable == 0)
106 on_screen = 0;
107 /*
108 tweaked = 0;
109 */
110 while (on_screen) {
111 /* Get pointer to a tile: */
112 cpu->memory_rw(cpu, cpu->mem, tiletable +
113 sizeof(tileptr_buf) * tile_nr,
114 tileptr_buf, sizeof(tileptr_buf), MEM_READ,
115 NO_EXCEPTIONS | PHYSICAL);
116 tileptr = 256 * tileptr_buf[0] + tileptr_buf[1];
117 /* TODO: endianness */
118 tileptr <<= 16;
119
120 /* tileptr is now a physical address of a tile. */
121 debug("[ sgi_gbe: tile_nr = %2i, tileptr = 0x%08lx, xbase"
122 " = %4i, ybase = %4i ]\n", tile_nr, tileptr, xbase, ybase);
123
124 if (tweaked) {
125 /* Tweaked (linear) mode: */
126
127 /*
128 * Copy data from this 64KB physical RAM block to the
129 * framebuffer:
130 *
131 * NOTE: Copy it in smaller chunks than 64KB, in case
132 * the framebuffer device can optimize away
133 * portions that aren't modified that way.
134 */
135 copy_len = sizeof(buf);
136 copy_offset = 0;
137
138 while (on_screen && copy_offset < 65536) {
139 if (old_fb_offset + copy_len > (uint64_t)
140 (d->xres * d->yres * d->bitdepth / 8)) {
141 copy_len = d->xres * d->yres *
142 d->bitdepth / 8 - old_fb_offset;
143 /* Stop after copying this block... */
144 on_screen = 0;
145 }
146
147 /* debug("old_fb_offset = %08x copylen"
148 "=%i\n", old_fb_offset, copy_len); */
149
150 cpu->memory_rw(cpu, cpu->mem, tileptr +
151 copy_offset, buf, copy_len, MEM_READ,
152 NO_EXCEPTIONS | PHYSICAL);
153 dev_fb_access(cpu, cpu->mem, old_fb_offset,
154 buf, copy_len, MEM_WRITE, d->fb_data);
155 copy_offset += sizeof(buf);
156 old_fb_offset += sizeof(buf);
157 }
158 } else {
159 /* This is for non-tweaked (tiled) mode. Not really
160 tested with correct image data, but might work: */
161
162 lines_to_copy = 128;
163 if (ybase + lines_to_copy > d->yres)
164 lines_to_copy = d->yres - ybase;
165
166 pixels_per_line = 512 * 8 / d->bitdepth;
167 if (xbase + pixels_per_line > d->xres)
168 pixels_per_line = d->xres - xbase;
169
170 for (y=0; y<lines_to_copy; y++) {
171 cpu->memory_rw(cpu, cpu->mem, tileptr + 512 * y,
172 buf, pixels_per_line * d->bitdepth / 8,
173 MEM_READ, NO_EXCEPTIONS | PHYSICAL);
174 #if 0
175 {
176 int i;
177 for (i=0; i<pixels_per_line * d->bitdepth / 8; i++)
178 buf[i] ^= (random() & 0x20);
179 }
180 #endif
181 dev_fb_access(cpu, cpu->mem, ((ybase + y) *
182 d->xres + xbase) * d->bitdepth / 8,
183 buf, pixels_per_line * d->bitdepth / 8,
184 MEM_WRITE, d->fb_data);
185 }
186
187 /* Go to next tile: */
188 xbase += (512 * 8 / d->bitdepth);
189 if (xbase >= d->xres) {
190 xbase = 0;
191 ybase += 128;
192 if (ybase >= d->yres)
193 on_screen = 0;
194 }
195 }
196
197 /* Go to next tile: */
198 tile_nr ++;
199 }
200
201 /* debug("[ sgi_gbe: dev_sgi_gbe_tick() end]\n"); */
202 }
203
204
205 /*
206 * dev_sgi_gbe_access():
207 */
208 DEVICE_ACCESS(sgi_gbe)
209 {
210 struct sgi_gbe_data *d = extra;
211 uint64_t idata = 0, odata = 0;
212
213 if (writeflag == MEM_WRITE)
214 idata = memory_readmax64(cpu, data, len);
215
216 #ifdef GBE_DEBUG
217 if (writeflag == MEM_WRITE)
218 debug("[ sgi_gbe: DEBUG: write to address 0x%llx, data"
219 "=0x%llx ]\n", (long long)relative_addr, (long long)idata);
220 #endif
221
222 switch (relative_addr) {
223
224 case 0x0:
225 if (writeflag == MEM_WRITE)
226 d->control = idata;
227 else
228 odata = d->control;
229 break;
230
231 case 0x4:
232 if (writeflag == MEM_WRITE)
233 d->dotclock = idata;
234 else
235 odata = d->dotclock;
236 break;
237
238 case 0x8: /* i2c? */
239 /*
240 * "CRT I2C control".
241 *
242 * I'm not sure what this does. It isn't really commented
243 * in the linux sources. The IP32 prom writes the values
244 * 0x03, 0x01, and then 0x00 to this address, and then
245 * reads back a value.
246 */
247 if (writeflag == MEM_WRITE) {
248 d->i2c = idata;
249 } else {
250 odata = d->i2c;
251 odata |= 1; /* ? The IP32 prom wants this? */
252 }
253 break;
254
255 case 0x10: /* i2cfp, flat panel control */
256 if (writeflag == MEM_WRITE) {
257 d->i2cfp = idata;
258 } else {
259 odata = d->i2cfp;
260 odata |= 1; /* ? The IP32 prom wants this? */
261 }
262 break;
263
264 case 0x10000: /* vt_xy, according to Linux */
265 if (writeflag == MEM_WRITE)
266 d->freeze = idata & ((uint32_t)1<<31)? 1 : 0;
267 else {
268 /* bit 31 = freeze, 23..12 = cury, 11.0 = curx */
269 odata = ((random() % (d->yres + 10)) << 12)
270 + (random() % (d->xres + 10)) +
271 (d->freeze? ((uint32_t)1 << 31) : 0);
272 odata = random(); /* testhack for the ip32 prom */
273 }
274 break;
275
276 case 0x10004: /* vt_xymax, according to Linux */
277 odata = ((d->yres-1) << 12) + d->xres-1;
278 /* ... 12 bits maxy, 12 bits maxx. */
279 break;
280
281 case 0x10034: /* vt_hpixen, according to Linux */
282 odata = (0 << 12) + d->xres-1;
283 /* ... 12 bits on, 12 bits off. */
284 break;
285
286 case 0x10038: /* vt_vpixen, according to Linux */
287 odata = (0 << 12) + d->yres-1;
288 /* ... 12 bits on, 12 bits off. */
289 break;
290
291 case 0x20004:
292 odata = random(); /* IP32 prom test hack. TODO */
293 /* IRIX wants 0x20, it seems. */
294 if (random() & 1)
295 odata = 0x20;
296 break;
297
298 case 0x30000: /* normal plane ctrl 0 */
299 /* bit 15 = fifo reset, 14..13 = depth,
300 12..5 = tile width, 4..0 = rhs */
301 if (writeflag == MEM_WRITE) {
302 d->plane0ctrl = idata;
303 d->bitdepth = 8 << ((d->plane0ctrl >> 13) & 3);
304 debug("[ sgi_gbe: setting color depth to %i bits ]\n",
305 d->bitdepth);
306 if (d->bitdepth != 8)
307 fatal("sgi_gbe: warning: bitdepth %i not "
308 "really implemented yet\n", d->bitdepth);
309 } else
310 odata = d->plane0ctrl;
311 break;
312
313 case 0x30008: /* normal plane ctrl 2 */
314 odata = random(); /* IP32 prom test hack. TODO */
315 /* IRIX wants 0x20, it seems. */
316 if (random() & 1)
317 odata = 0x20;
318 break;
319
320 case 0x3000c: /* normal plane ctrl 3 */
321 /*
322 * Writes to 3000c should be readable back at 30008?
323 * At least bit 0 (dma) ctrl 3.
324 *
325 * Bits 31..9 = tile table pointer bits,
326 * Bit 1 = linear
327 * Bit 0 = dma
328 */
329 if (writeflag == MEM_WRITE) {
330 d->frm_control = idata;
331 debug("[ sgi_gbe: frm_control = 0x%08x ]\n",
332 d->frm_control);
333 } else
334 odata = d->frm_control;
335 break;
336
337 case 0x40000:
338 odata = random(); /* IP32 prom test hack. TODO */
339 /* IRIX wants 0x20, it seems. */
340 if (random() & 1)
341 odata = 0x20;
342 break;
343
344 /*
345 * Linux/sgimips seems to write color palette data to offset 0x50000
346 * to 0x503xx, and gamma correction data to 0x60000 - 0x603ff, as
347 * 32-bit values at addresses divisible by 4 (formated as 0xrrggbb00).
348 *
349 * sgio2fb: initializing
350 * sgio2fb: I/O at 0xffffffffb6000000
351 * sgio2fb: tiles at ffffffffa2ef5000
352 * sgio2fb: framebuffer at ffffffffa1000000
353 * sgio2fb: 8192kB memory
354 * Console: switching to colour frame buffer device 80x30
355 */
356
357 default:
358 /* Gamma correction: */
359 if (relative_addr >= 0x60000 && relative_addr <= 0x603ff) {
360 /* ignore gamma correction for now */
361 break;
362 }
363
364 /* RGB Palette: */
365 if (relative_addr >= 0x50000 && relative_addr <= 0x503ff) {
366 int color_nr, r, g, b;
367 int old_r, old_g, old_b;
368
369 color_nr = (relative_addr & 0x3ff) / 4;
370 r = (idata >> 24) & 0xff;
371 g = (idata >> 16) & 0xff;
372 b = (idata >> 8) & 0xff;
373
374 old_r = d->fb_data->rgb_palette[color_nr * 3 + 0];
375 old_g = d->fb_data->rgb_palette[color_nr * 3 + 1];
376 old_b = d->fb_data->rgb_palette[color_nr * 3 + 2];
377
378 d->fb_data->rgb_palette[color_nr * 3 + 0] = r;
379 d->fb_data->rgb_palette[color_nr * 3 + 1] = g;
380 d->fb_data->rgb_palette[color_nr * 3 + 2] = b;
381
382 if (r != old_r || g != old_g || b != old_b) {
383 /* If the palette has been changed, the entire
384 image needs to be redrawn... :-/ */
385 d->fb_data->update_x1 = 0;
386 d->fb_data->update_x2 = d->fb_data->xsize - 1;
387 d->fb_data->update_y1 = 0;
388 d->fb_data->update_y2 = d->fb_data->ysize - 1;
389 }
390 break;
391 }
392
393 if (writeflag == MEM_WRITE)
394 debug("[ sgi_gbe: unimplemented write to address "
395 "0x%llx, data=0x%llx ]\n",
396 (long long)relative_addr, (long long)idata);
397 else
398 debug("[ sgi_gbe: unimplemented read from address "
399 "0x%llx ]\n", (long long)relative_addr);
400 }
401
402 if (writeflag == MEM_READ) {
403 #ifdef GBE_DEBUG
404 debug("[ sgi_gbe: DEBUG: read from address 0x%llx: 0x%llx ]\n",
405 (long long)relative_addr, (long long)odata);
406 #endif
407 memory_writemax64(cpu, data, len, odata);
408 }
409
410 return 1;
411 }
412
413
414 /*
415 * dev_sgi_gbe_init():
416 */
417 void dev_sgi_gbe_init(struct machine *machine, struct memory *mem,
418 uint64_t baseaddr)
419 {
420 struct sgi_gbe_data *d;
421
422 d = malloc(sizeof(struct sgi_gbe_data));
423 if (d == NULL) {
424 fprintf(stderr, "out of memory\n");
425 exit(1);
426 }
427 memset(d, 0, sizeof(struct sgi_gbe_data));
428
429 /* 640x480 for Linux: */
430 d->xres = GBE_DEFAULT_XRES;
431 d->yres = GBE_DEFAULT_YRES;
432 d->bitdepth = 8;
433 d->control = 0x20aa000; /* or 0x00000001? */
434
435 /* 1280x1024 for booting the O2's PROM: */
436 d->xres = 1280; d->yres = 1024;
437
438 d->fb_data = dev_fb_init(machine, mem, FAKE_GBE_FB_ADDRESS,
439 VFB_GENERIC, d->xres, d->yres, d->xres, d->yres, 8, "SGI GBE");
440 set_grayscale_palette(d->fb_data, 256);
441
442 memory_device_register(mem, "sgi_gbe", baseaddr, DEV_SGI_GBE_LENGTH,
443 dev_sgi_gbe_access, d, DM_DEFAULT, NULL);
444 machine_add_tickfunction(machine, dev_sgi_gbe_tick, d, 18);
445 }
446

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