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

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Revision 42 - (show annotations)
Mon Oct 8 16:22:32 2007 UTC (16 years, 6 months ago) by dpavlin
File MIME type: text/plain
File size: 8419 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_sgi_mardigras.c,v 1.25 2007/06/15 19:57:34 debug Exp $
29 *
30 * COMMENT: MardiGras graphics controller on SGI IP30 (Octane)
31 *
32 * Most of this is just guesses based on the behaviour of Linux/Octane.
33 *
34 * TODO
35 */
36
37 #include <stdio.h>
38 #include <stdlib.h>
39 #include <string.h>
40
41 #include "cpu.h"
42 #include "device.h"
43 #include "devices.h"
44 #include "memory.h"
45 #include "machine.h"
46 #include "misc.h"
47
48
49 #define debug fatal
50
51
52 #define DEV_SGI_MARDIGRAS_LENGTH 0x800000
53
54 #define MARDIGRAS_FAKE_OFFSET 0x500000000ULL /* hopefully available */
55 #define MARDIGRAS_DEFAULT_XSIZE 1280
56 #define MARDIGRAS_DEFAULT_YSIZE 1024
57
58 #define MICROCODE_START 0x50000
59 #define MICROCODE_END 0x55000
60
61 static int mardigras_xsize = MARDIGRAS_DEFAULT_XSIZE;
62 static int mardigras_ysize = MARDIGRAS_DEFAULT_YSIZE;
63
64 struct sgi_mardigras_data {
65 struct vfb_data *fb;
66 unsigned char microcode_ram[MICROCODE_END - MICROCODE_START];
67 uint64_t palette_reg_select;
68 int currentx;
69 int currenty;
70 int color;
71 int startx;
72 int starty;
73 int stopx;
74 int stopy;
75 uint64_t draw_mode;
76 };
77
78
79 /*
80 * mardigras_20400():
81 */
82 void mardigras_20400(struct cpu *cpu, struct sgi_mardigras_data *d,
83 uint64_t idata)
84 {
85 int i, x, y, r,g,b, len, addr;
86 unsigned char pixels[3 * 8000];
87
88 /* Get rgb from palette: */
89 r = d->fb->rgb_palette[d->color * 3 + 0];
90 g = d->fb->rgb_palette[d->color * 3 + 1];
91 b = d->fb->rgb_palette[d->color * 3 + 2];
92
93 /* Set color: */
94 if ((idata & 0x00ffffff00000000ULL) == 0x00185C0400000000ULL) {
95 int color = (idata >> 12) & 0xff;
96 d->color = color;
97 return;
98 }
99
100 /* Set start XY: */
101 if ((idata & 0x00ffffff00000000ULL) == 0x0018460400000000ULL) {
102 d->startx = (idata >> 16) & 0xffff;
103 d->starty = idata & 0xffff;
104 if (d->startx >= mardigras_xsize)
105 d->startx = 0;
106 if (d->starty >= mardigras_ysize)
107 d->starty = 0;
108 d->currentx = d->startx;
109 d->currenty = d->starty;
110 return;
111 }
112
113 /* Set stop XY: */
114 if ((idata & 0x00ffffff00000000ULL) == 0x0018470400000000ULL) {
115 d->stopx = (idata >> 16) & 0xffff;
116 d->stopy = idata & 0xffff;
117 if (d->stopx >= mardigras_xsize)
118 d->stopx = 0;
119 if (d->stopy >= mardigras_ysize)
120 d->stopy = 0;
121 return;
122 }
123
124 /* Draw modes: (Rectangle or Bitmap, respectively) */
125 if (idata == 0x0019100400018000ULL ||
126 idata == 0x0019100400418008ULL) {
127 d->draw_mode = idata;
128 return;
129 }
130
131 /* Send command: */
132 if (idata == 0x001C130400000018ULL) {
133 switch (d->draw_mode) {
134 /* Rectangle: */
135 case 0x0019100400018000ULL:
136 /* Fill pixels[] with pixels: */
137 len = 0;
138 for (x=d->startx; x<=d->stopx; x++) {
139 pixels[len + 0] = r;
140 pixels[len + 1] = g;
141 pixels[len + 2] = b;
142 len += 3;
143 }
144 if (len == 0)
145 break;
146 for (y=d->starty; y<=d->stopy; y++) {
147 addr = (mardigras_xsize * (mardigras_ysize -
148 1 - y) + d->startx) * 3;
149 /* printf("addr = %i\n", addr); */
150
151 /* Write a line: */
152 dev_fb_access(cpu, cpu->mem,
153 addr, pixels, len, MEM_WRITE, d->fb);
154 }
155 break;
156 /* Bitmap: */
157 case 0x0019100400418008ULL:
158 break;
159 default:
160 fatal("[ sgi_mardigras: unknown draw mode ]\n");
161 }
162 return;
163 }
164
165 /* Send a line of bitmap data: */
166 if ((idata & 0x00ffffff00000000ULL) == 0x001C700400000000ULL) {
167 addr = (mardigras_xsize * (mardigras_ysize - 1 - d->currenty)
168 + d->currentx) * 3;
169 /*
170 printf("addr=%08x curx,y=%4i,%4i startx,y=%4i,%4i "
171 "stopx,y=%4i,%4i\n", addr, d->currentx, d->currenty,
172 d->startx, d->starty, d->stopx, d->stopy);
173 */
174 len = 8*3;
175
176 if (addr > mardigras_xsize * mardigras_ysize * 3 || addr < 0)
177 return;
178
179 /* Read a line: */
180 dev_fb_access(cpu, cpu->mem,
181 addr, pixels, len, MEM_READ, d->fb);
182
183 i = 0;
184 while (i < 8) {
185 if ((idata >> (24 + (7-i))) & 1) {
186 pixels[i*3 + 0] = r;
187 pixels[i*3 + 1] = g;
188 pixels[i*3 + 2] = b;
189 }
190 i ++;
191
192 d->currentx ++;
193 if (d->currentx > d->stopx) {
194 d->currentx = d->startx;
195 d->currenty ++;
196 if (d->currenty > d->stopy)
197 d->currenty = d->starty;
198 }
199 }
200
201 /* Write a line: */
202 dev_fb_access(cpu, cpu->mem,
203 addr, pixels, len, MEM_WRITE, d->fb);
204
205 return;
206 }
207
208 debug("mardigras_20400(): 0x%016"PRIx64"\n", (uint64_t) idata);
209 }
210
211
212 DEVICE_ACCESS(sgi_mardigras)
213 {
214 uint64_t idata = 0, odata = 0;
215 struct sgi_mardigras_data *d = extra;
216 int i;
217
218 if (writeflag == MEM_WRITE)
219 idata = memory_readmax64(cpu, data, len);
220
221 /* Accessing the microcode_ram works like ordinary ram: */
222 if (relative_addr >= MICROCODE_START &&
223 relative_addr < MICROCODE_END) {
224 relative_addr -= MICROCODE_START;
225 if (writeflag == MEM_WRITE)
226 memcpy(d->microcode_ram + relative_addr, data, len);
227 else
228 memcpy(data, d->microcode_ram + relative_addr, len);
229 return 1;
230 }
231
232 switch (relative_addr) {
233
234 case 0x00004:
235 /* xtalk data: (according to Linux/IP30) */
236 /* (mfgr & 0x7ff) << 1 */
237 /* (part & 0xffff) << 12 */
238 /* (rev & 0xf) << 28 */
239 odata = (2 << 28) | (0xc003 << 12) | (0x2aa << 1);
240 break;
241
242 case 0x20008: /* Fifo status */
243 break;
244
245 case 0x20200:
246 break;
247
248 case 0x20400:
249 if (writeflag == MEM_WRITE)
250 mardigras_20400(cpu, d, idata);
251 else
252 debug("[ sgi_mardigras: read from 0x20400? ]\n");
253 break;
254
255 case 0x58040:
256 /* HQ4 microcode stuff */
257 break;
258
259 case 0x70c30:
260 /* Palette register select? */
261 if (writeflag == MEM_WRITE)
262 d->palette_reg_select = idata;
263 else
264 odata = d->palette_reg_select;
265 break;
266
267 case 0x70d18:
268 /* Palette register read/write? */
269 i = 3 * ((d->palette_reg_select >> 8) & 0xff);
270 if (writeflag == MEM_WRITE) {
271 d->fb->rgb_palette[i + 0] = (idata >> 24) & 0xff;
272 d->fb->rgb_palette[i + 1] = (idata >> 16) & 0xff;
273 d->fb->rgb_palette[i + 2] = (idata >> 8) & 0xff;
274 } else {
275 odata = (d->fb->rgb_palette[i+0] << 24) +
276 (d->fb->rgb_palette[i+1] << 16) +
277 (d->fb->rgb_palette[i+2] << 8);
278 }
279 break;
280
281 case 0x71208:
282 odata = 8;
283 break;
284
285 default:
286 if (writeflag==MEM_READ) {
287 debug("[ sgi_mardigras: read from 0x%08lx ]\n",
288 (long)relative_addr);
289 } else {
290 debug("[ sgi_mardigras: write to 0x%08lx: 0x%016"PRIx64
291 " ]\n", (long) relative_addr, (uint64_t) idata);
292 }
293 }
294
295 if (writeflag == MEM_READ)
296 memory_writemax64(cpu, data, len, odata);
297
298 return 1;
299 }
300
301
302 DEVINIT(sgi_mardigras)
303 {
304 struct sgi_mardigras_data *d;
305
306 CHECK_ALLOCATION(d = malloc(sizeof(struct sgi_mardigras_data)));
307 memset(d, 0, sizeof(struct sgi_mardigras_data));
308
309 d->fb = dev_fb_init(devinit->machine, devinit->machine->memory,
310 MARDIGRAS_FAKE_OFFSET, VFB_GENERIC,
311 mardigras_xsize, mardigras_ysize,
312 mardigras_xsize, mardigras_ysize, 24, "SGI MardiGras");
313 if (d->fb == NULL) {
314 fprintf(stderr, "dev_sgi_mardigras_init(): out of memory\n");
315 exit(1);
316 }
317
318 memory_device_register(devinit->machine->memory, devinit->name,
319 devinit->addr, DEV_SGI_MARDIGRAS_LENGTH, dev_sgi_mardigras_access,
320 d, DM_DEFAULT, NULL);
321
322 return 1;
323 }
324
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