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

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Mon Oct 8 16:19:37 2007 UTC (16 years, 6 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_sgi_gbe.c,v 1.32 2006/01/01 13:17:17 debug Exp $
29 dpavlin 4 *
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 dpavlin 12 /* #define debug fatal */
51 dpavlin 4
52 dpavlin 14 #define MTE_TEST
53 dpavlin 12
54 dpavlin 4 #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 dpavlin 12 unsigned char buf[16384]; /* must be power of 2, at most 65536 */
94 dpavlin 4 int copy_len, copy_offset;
95     uint64_t old_fb_offset = 0;
96     int tweaked = 1;
97    
98 dpavlin 12 #ifdef MTE_TEST
99     return;
100     #endif
101    
102 dpavlin 4 /* debug("[ sgi_gbe: dev_sgi_gbe_tick() ]\n"); */
103    
104     tiletable = (d->frm_control & 0xfffffe00);
105     if (tiletable == 0)
106     on_screen = 0;
107 dpavlin 12 /*
108     tweaked = 0;
109     */
110 dpavlin 4 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 dpavlin 22 /*
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 dpavlin 4 copy_len = sizeof(buf);
136     copy_offset = 0;
137    
138     while (on_screen && copy_offset < 65536) {
139 dpavlin 22 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 dpavlin 4 /* 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 dpavlin 22 /* This is for non-tweaked (tiled) mode. Not really
160     tested with correct image data, but might work: */
161 dpavlin 4
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 dpavlin 12 #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 dpavlin 4 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 dpavlin 22 DEVICE_ACCESS(sgi_gbe)
209 dpavlin 4 {
210     struct sgi_gbe_data *d = extra;
211     uint64_t idata = 0, odata = 0;
212    
213 dpavlin 18 if (writeflag == MEM_WRITE)
214     idata = memory_readmax64(cpu, data, len);
215 dpavlin 4
216     #ifdef GBE_DEBUG
217     if (writeflag == MEM_WRITE)
218 dpavlin 22 debug("[ sgi_gbe: DEBUG: write to address 0x%llx, data"
219     "=0x%llx ]\n", (long long)relative_addr, (long long)idata);
220 dpavlin 4 #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 dpavlin 22 + (random() % (d->xres + 10)) +
271     (d->freeze? ((uint32_t)1 << 31) : 0);
272 dpavlin 4 odata = random(); /* testhack for the ip32 prom */
273     }
274     break;
275    
276     case 0x10004: /* vt_xymax, according to Linux */
277 dpavlin 22 odata = ((d->yres-1) << 12) + d->xres-1;
278     /* ... 12 bits maxy, 12 bits maxx. */
279 dpavlin 4 break;
280    
281     case 0x10034: /* vt_hpixen, according to Linux */
282 dpavlin 22 odata = (0 << 12) + d->xres-1;
283     /* ... 12 bits on, 12 bits off. */
284 dpavlin 4 break;
285    
286     case 0x10038: /* vt_vpixen, according to Linux */
287 dpavlin 22 odata = (0 << 12) + d->yres-1;
288     /* ... 12 bits on, 12 bits off. */
289 dpavlin 4 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 dpavlin 22 /* bit 15 = fifo reset, 14..13 = depth,
300     12..5 = tile width, 4..0 = rhs */
301 dpavlin 4 if (writeflag == MEM_WRITE) {
302     d->plane0ctrl = idata;
303     d->bitdepth = 8 << ((d->plane0ctrl >> 13) & 3);
304 dpavlin 22 debug("[ sgi_gbe: setting color depth to %i bits ]\n",
305     d->bitdepth);
306 dpavlin 4 if (d->bitdepth != 8)
307 dpavlin 22 fatal("sgi_gbe: warning: bitdepth %i not "
308     "really implemented yet\n", d->bitdepth);
309 dpavlin 4 } 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 dpavlin 22 /*
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 dpavlin 4 if (writeflag == MEM_WRITE) {
330     d->frm_control = idata;
331 dpavlin 22 debug("[ sgi_gbe: frm_control = 0x%08x ]\n",
332     d->frm_control);
333 dpavlin 4 } 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 dpavlin 22 * 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 dpavlin 4 *
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 dpavlin 22 /* If the palette has been changed, the entire
384     image needs to be redrawn... :-/ */
385 dpavlin 4 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 dpavlin 22 debug("[ sgi_gbe: unimplemented write to address "
395     "0x%llx, data=0x%llx ]\n",
396     (long long)relative_addr, (long long)idata);
397 dpavlin 4 else
398 dpavlin 22 debug("[ sgi_gbe: unimplemented read from address "
399     "0x%llx ]\n", (long long)relative_addr);
400 dpavlin 4 }
401    
402     if (writeflag == MEM_READ) {
403     #ifdef GBE_DEBUG
404 dpavlin 22 debug("[ sgi_gbe: DEBUG: read from address 0x%llx: 0x%llx ]\n",
405     (long long)relative_addr, (long long)odata);
406 dpavlin 4 #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 dpavlin 14
429     /* 640x480 for Linux: */
430 dpavlin 4 d->xres = GBE_DEFAULT_XRES;
431     d->yres = GBE_DEFAULT_YRES;
432     d->bitdepth = 8;
433     d->control = 0x20aa000; /* or 0x00000001? */
434 dpavlin 14
435     /* 1280x1024 for booting the O2's PROM: */
436     d->xres = 1280; d->yres = 1024;
437    
438 dpavlin 4 d->fb_data = dev_fb_init(machine, mem, FAKE_GBE_FB_ADDRESS,
439 dpavlin 12 VFB_GENERIC, d->xres, d->yres, d->xres, d->yres, 8, "SGI GBE");
440 dpavlin 4 set_grayscale_palette(d->fb_data, 256);
441    
442     memory_device_register(mem, "sgi_gbe", baseaddr, DEV_SGI_GBE_LENGTH,
443 dpavlin 20 dev_sgi_gbe_access, d, DM_DEFAULT, NULL);
444 dpavlin 4 machine_add_tickfunction(machine, dev_sgi_gbe_tick, d, 18);
445     }
446    

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