/[gxemul]/trunk/src/dec_prom.c
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Contents of /trunk/src/dec_prom.c

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Revision 10 - (show annotations)
Mon Oct 8 16:18:27 2007 UTC (12 years, 1 month ago) by dpavlin
File MIME type: text/plain
File size: 19543 byte(s)
++ trunk/HISTORY	(local)
$Id: HISTORY,v 1.815 2005/06/27 23:04:35 debug Exp $
20050617	Experimenting some more with netbooting OpenBSD/sgi. Adding
		a hack which allows emulated ethernet networks to be
		distributed across multiple emulator processes.
20050618	Minor updates (documentation, dummy YAMON emulation, etc).
20050620	strcpy/strcat -> strlcpy/strlcat updates.
		Some more progress on evbmips (Malta).
20050621	Adding a section to doc/configfiles.html about ethernet
		emulation across multiple hosts.
		Beginning the work on the ARM translation engine (using the
		dynamic-but-not-binary translation method).
		Fixing a bintrans bug: 0x9fc00000 should always be treated as
		PROM area, just as 0xbfc00000 is.
		Minor progress on Malta emulation (the PCI-ISA bus).
20050622	NetBSD/evbmips can now be installed (using another emulated
		machine) and run (including userland and so on). :-)
		Spliting up the bintrans haddr_entry field into two (one for
		read, one for write). Probably not much of a speed increase,
		though.
		Updating some NetBSD 2.0 -> 2.0.2 in the documentation.
20050623	Minor updates (documentation, the TODO file, etc).
		gzipped kernels are now always automagically gunzipped when
		loaded.
20050624	Adding a dummy Playstation Portable (PSP) mode, just barely
		enough to run Hello World (in weird colors :-).
		Removing the -b command line option; old bintrans is enabled
		by default instead. It makes more sense.
		Trying to finally fix the non-working performance measurement
		thing (instr/second etc).
20050625	Continuing on the essential basics for ARM emulation. Two
		instructions seem to work, a branch and a simple "mov". (The
		mov arguments are not correct yet.) Performance is definitely
		reasonable.
		Various other minor updates.
		Adding the ARM "bl" instruction.
		Adding support for combining multiple ARM instructions into one
		function call. ("mov" + "mov" is the only one implemented so
		far, but it seems to work.)
		Cleaning up some IP32 interrupt things (crime/mace); disabling
		the PS/2 keyboard controller on IP32, so that NetBSD/sgimips
		boots into userland again.
20050626	Finally! NetBSD/sgimips netboots. Adding instructions to
		doc/guestoses.html on how to set up an nfs server etc.
		Various other minor fixes.
		Playstation Portable ".pbp" files can now be used directly.
		(The ELF part of the .pbp is extracted transparently.)
		Converting some sprintf -> snprintf.
		Adding some more instructions to the ARM disassembler.
20050627	More ARM updates. Adding some simple ldr(b), str(b),
		cmps, and conditional branch instructions, enough to run
		a simple Hello World program.
		All ARM instructions are now inlined/generated for all possible
		condition codes.
		Adding add and sub, and more load/store instructions.
		Removing dummy files: cpu_alpha.c, cpu_hppa.c, and cpu_sparc.c.
		Some minor documentation updates; preparing for a 0.3.4
		release. Updating some URLs.

==============  RELEASE 0.3.4  ==============


1 /*
2 * Copyright (C) 2003-2005 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: dec_prom.c,v 1.60 2005/06/26 11:36:28 debug Exp $
29 *
30 * DECstation PROM emulation.
31 */
32
33 #include <stdio.h>
34 #include <stdlib.h>
35 #include <string.h>
36 #include <sys/types.h>
37 #include <sys/time.h>
38 #include <sys/resource.h>
39
40 #include "console.h"
41 #include "cpu.h"
42 #include "cpu_mips.h"
43 #include "diskimage.h"
44 #include "machine.h"
45 #include "memory.h"
46 #include "misc.h"
47
48 #include "dec_prom.h"
49 #include "dec_5100.h"
50 #include "dec_kn01.h"
51 #include "dec_kn02.h"
52 #include "dec_kn03.h"
53
54
55 extern int quiet_mode;
56
57
58 /*
59 * mem_readchar():
60 *
61 * Reads a byte from emulated RAM, using a MIPS register as a base address.
62 * (Helper function.)
63 */
64 static unsigned char mem_readchar(struct cpu *cpu, int regbase, int offset)
65 {
66 unsigned char ch;
67 cpu->memory_rw(cpu, cpu->mem, cpu->cd.mips.gpr[regbase] + offset,
68 &ch, sizeof(ch), MEM_READ, CACHE_DATA | NO_EXCEPTIONS);
69 return ch;
70 }
71
72
73 /*
74 * dec_jumptable_func():
75 *
76 * The jumptable is located at the beginning of the PROM, at 0xbfc00000 + i*8,
77 * where i is the decimal function number. Many of these can be converted to
78 * an identical callback function.
79 *
80 * Return value is non-zero if the vector number was converted into a callback
81 * function number, otherwise 0.
82 *
83 * Vector (dec) Function
84 * 0x0 0 reset()
85 * 0x10 2 restart()
86 * 0x18 3 reinit()
87 * 0x30 6 open()
88 * 0x38 7 read()
89 * 0x58 11 lseek()
90 * 0x68 13 putchar()
91 * 0x88 17 printf()
92 * 0x108 33 getenv2()
93 */
94 int dec_jumptable_func(struct cpu *cpu, int vector)
95 {
96 int i;
97 static int file_opened = 0;
98 static int current_file_offset = 0;
99
100 switch (vector) {
101 case 0x0: /* reset() */
102 /* TODO */
103 cpu->machine->exit_without_entering_debugger = 1;
104 cpu->running = 0;
105 cpu->dead = 1;
106 break;
107 case 0x10: /* restart() */
108 /* TODO */
109 cpu->machine->exit_without_entering_debugger = 1;
110 cpu->running = 0;
111 cpu->dead = 1;
112 break;
113 case 0x18: /* reinit() */
114 /* TODO */
115 cpu->machine->exit_without_entering_debugger = 1;
116 cpu->cd.mips.gpr[MIPS_GPR_V0] = 0;
117 break;
118 case 0x30: /* open() */
119 /*
120 * TODO: This is just a hack to allow Sprite/pmax' bootblock
121 * code to load /vmsprite. The filename argument (in A0)
122 * is ignored, and a file handle value of 1 is returned.
123 */
124 if (file_opened) {
125 fatal("\ndec_jumptable_func(): opening more than one "
126 "file isn't supported yet.\n");
127 cpu->running = 0;
128 cpu->dead = 1;
129 }
130 file_opened = 1;
131 cpu->cd.mips.gpr[MIPS_GPR_V0] = 1;
132 break;
133 case 0x38: /* read(handle, ptr, length) */
134 cpu->cd.mips.gpr[MIPS_GPR_V0] = -1;
135 if ((int32_t)cpu->cd.mips.gpr[MIPS_GPR_A2] > 0) {
136 int disk_id = diskimage_bootdev(cpu->machine, NULL);
137 int res;
138 unsigned char *tmp_buf;
139
140 tmp_buf = malloc(cpu->cd.mips.gpr[MIPS_GPR_A2]);
141 if (tmp_buf == NULL) {
142 fprintf(stderr, "[ *** Out of memory in "
143 "dec_prom.c, allocating %i bytes ]\n",
144 (int)cpu->cd.mips.gpr[MIPS_GPR_A2]);
145 break;
146 }
147
148 res = diskimage_access(cpu->machine, disk_id,
149 DISKIMAGE_SCSI, 0, current_file_offset, tmp_buf,
150 cpu->cd.mips.gpr[MIPS_GPR_A2]);
151
152 /* If the transfer was successful, transfer the data
153 to emulated memory: */
154 if (res) {
155 uint64_t dst = cpu->cd.mips.gpr[MIPS_GPR_A1];
156 store_buf(cpu, dst, (char *)tmp_buf,
157 cpu->cd.mips.gpr[MIPS_GPR_A2]);
158 cpu->cd.mips.gpr[MIPS_GPR_V0] =
159 cpu->cd.mips.gpr[MIPS_GPR_A2];
160 current_file_offset +=
161 cpu->cd.mips.gpr[MIPS_GPR_A2];
162 }
163
164 free(tmp_buf);
165 }
166 break;
167 case 0x58: /* lseek(handle, offset[, whence]) */
168 /* TODO */
169 if (cpu->cd.mips.gpr[MIPS_GPR_A2] == 0)
170 current_file_offset = cpu->cd.mips.gpr[MIPS_GPR_A1];
171 else
172 fatal("WARNING! Unimplemented whence in "
173 "dec_jumptable_func()\n");
174 cpu->cd.mips.gpr[MIPS_GPR_V0] = 0;
175 break;
176 case 0x68: /* putchar() */
177 console_putchar(cpu->machine->main_console_handle,
178 cpu->cd.mips.gpr[MIPS_GPR_A0]);
179 break;
180 case 0x88: /* printf() */
181 return 0x30;
182 case 0x108: /* getenv2() */
183 return 0x64;
184 default:
185 cpu_register_dump(cpu->machine, cpu, 1, 0x1);
186 printf("a0 points to: ");
187 for (i=0; i<40; i++) {
188 unsigned char ch = '\0';
189 cpu->memory_rw(cpu, cpu->mem,
190 cpu->cd.mips.gpr[MIPS_GPR_A0] + i, &ch,
191 sizeof(ch), MEM_READ, CACHE_DATA | NO_EXCEPTIONS);
192 if (ch >= ' ' && ch < 126)
193 printf("%c", ch);
194 else
195 printf("[%02x]", ch);
196 }
197 printf("\n");
198 fatal("PROM emulation: unimplemented JUMP TABLE vector "
199 "0x%x (decimal function %i)\n", vector, vector/8);
200 cpu->running = 0;
201 cpu->dead = 1;
202 }
203
204 return 0;
205 }
206
207
208 /*
209 * decstation_prom_emul():
210 *
211 * DECstation PROM emulation.
212 *
213 * Callback functions:
214 * 0x0c strcmp()
215 * 0x14 strlen()
216 * 0x24 getchar()
217 * 0x28 gets()
218 * 0x2c puts()
219 * 0x30 printf()
220 * 0x38 iopoll()
221 * 0x54 bootinit()
222 * 0x58 bootread()
223 * 0x64 getenv()
224 * 0x6c slot_address()
225 * 0x70 wbflush()
226 * 0x7c clear_cache()
227 * 0x80 getsysid()
228 * 0x84 getbitmap()
229 * 0x88 disableintr()
230 * 0x8c enableintr()
231 * 0x9c halt()
232 * 0xa4 gettcinfo()
233 * 0xa8 execute_cmd()
234 * 0xac rex()
235 */
236 int decstation_prom_emul(struct cpu *cpu)
237 {
238 int i, j, ch, argreg, argdata;
239 int vector = cpu->pc & 0xfff;
240 int callback = (cpu->pc & 0xf000)? 1 : 0;
241 unsigned char buf[100];
242 unsigned char ch1, ch2, ch3;
243 uint64_t tmpaddr, slot_base = 0x10000000, slot_size = 0;
244
245 if (!callback) {
246 vector = dec_jumptable_func(cpu, vector);
247 if (vector == 0)
248 return 1;
249 } else {
250 /* Vector number is n*4, PC points to n*8. */
251 vector /= 2;
252 }
253
254 switch (vector) {
255 case 0x0c: /* strcmp(): */
256 i = j = 0;
257 do {
258 ch1 = mem_readchar(cpu, MIPS_GPR_A0, i++);
259 ch2 = mem_readchar(cpu, MIPS_GPR_A1, j++);
260 } while (ch1 == ch2 && ch1 != '\0');
261
262 /* If ch1=='\0', then strings are equal. */
263 if (ch1 == '\0')
264 cpu->cd.mips.gpr[MIPS_GPR_V0] = 0;
265 if ((signed char)ch1 > (signed char)ch2)
266 cpu->cd.mips.gpr[MIPS_GPR_V0] = 1;
267 if ((signed char)ch1 < (signed char)ch2)
268 cpu->cd.mips.gpr[MIPS_GPR_V0] = -1;
269 break;
270 case 0x14: /* strlen(): */
271 i = 0;
272 do {
273 ch2 = mem_readchar(cpu, MIPS_GPR_A0, i++);
274 } while (ch2 != 0);
275 cpu->cd.mips.gpr[MIPS_GPR_V0] = i - 1;
276 break;
277 case 0x24: /* getchar() */
278 /* debug("[ DEC PROM getchar() ]\n"); */
279 cpu->cd.mips.gpr[MIPS_GPR_V0] = console_readchar(
280 cpu->machine->main_console_handle);
281 break;
282 case 0x28: /* gets() */
283 /* debug("[ DEC PROM gets() ]\n"); */
284 tmpaddr = cpu->cd.mips.gpr[MIPS_GPR_A0];
285 i = 0;
286
287 /* TODO: Make this not hang (block) the entire emulator */
288
289 do {
290 while ((ch = console_readchar(
291 cpu->machine->main_console_handle)) < 1)
292 ;
293 if (ch == '\r')
294 ch = '\n';
295 ch2 = ch;
296
297 if (ch == '\b') {
298 if (i > 0) {
299 console_putchar(cpu->machine->
300 main_console_handle, ch2);
301 console_putchar(cpu->machine->
302 main_console_handle, ' ');
303 console_putchar(cpu->machine->
304 main_console_handle, ch2);
305 }
306 } else
307 console_putchar(cpu->machine->
308 main_console_handle, ch2);
309
310 fflush(stdout);
311
312 if (ch == '\n') {
313 /* It seems that trailing newlines
314 are not included in the buffer. */
315 } else if (ch != '\b') {
316 cpu->memory_rw(cpu, cpu->mem,
317 cpu->cd.mips.gpr[MIPS_GPR_A0] + i,
318 &ch2, sizeof(ch2), MEM_WRITE,
319 CACHE_DATA | NO_EXCEPTIONS);
320 i++;
321 } else {
322 if (i > 0)
323 i--;
324 }
325 } while (ch2 != '\n');
326
327 /* Trailing nul-byte: */
328 ch2 = '\0';
329 cpu->memory_rw(cpu, cpu->mem, cpu->cd.mips.gpr[MIPS_GPR_A0] +
330 i, &ch2, sizeof(ch2), MEM_WRITE,
331 CACHE_DATA | NO_EXCEPTIONS);
332
333 /* Return the input argument: */
334 cpu->cd.mips.gpr[MIPS_GPR_V0] = cpu->cd.mips.gpr[MIPS_GPR_A0];
335 break;
336 case 0x2c: /* puts() */
337 i = 0;
338 while ((ch = mem_readchar(cpu, MIPS_GPR_A0, i++)) != '\0')
339 console_putchar(cpu->machine->main_console_handle, ch);
340 console_putchar(cpu->machine->main_console_handle, '\n');
341 cpu->cd.mips.gpr[MIPS_GPR_V0] = 0;
342 break;
343 case 0x30: /* printf() */
344 if (cpu->machine->register_dump ||
345 cpu->machine->instruction_trace)
346 debug("PROM printf(0x%08lx): \n",
347 (long)cpu->cd.mips.gpr[MIPS_GPR_A0]);
348
349 i = 0; ch = -1; argreg = MIPS_GPR_A1;
350 while (ch != '\0') {
351 char printfbuf[8000];
352 int x;
353
354 printfbuf[0] = printfbuf[sizeof(printfbuf)-1] = '\0';
355
356 ch = mem_readchar(cpu, MIPS_GPR_A0, i++);
357 switch (ch) {
358 case '%':
359 ch = '0';
360 while (ch >= '0' && ch <= '9')
361 ch = mem_readchar(cpu,
362 MIPS_GPR_A0, i++);
363
364 switch (ch) {
365 case '%':
366 strlcpy(printfbuf, "%%",
367 sizeof(printfbuf));
368 break;
369 case 'c':
370 case 'd':
371 case 's':
372 case 'x':
373 /* Get argument: */
374 if (argreg > MIPS_GPR_A3) {
375 #if 1
376 /* Linux booters seem to go
377 over the edge sometimes: */
378 ch = '\0';
379 strlcpy(printfbuf, "[...]\n",
380 sizeof(printfbuf));
381 #else
382 printf("[ decstation_prom_emul"
383 "(): too many arguments ]");
384 /* This reuses the last arg,
385 which is utterly incorrect.
386 (TODO) */
387 argreg = MIPS_GPR_A3;
388 #endif
389 }
390
391 ch2 = argdata =
392 cpu->cd.mips.gpr[argreg];
393
394 switch (ch) {
395 case 'c':
396 snprintf(printfbuf, sizeof(
397 printfbuf), "%c", ch2);
398 break;
399 case 'd':
400 snprintf(printfbuf, sizeof(
401 printfbuf), "%d", argdata);
402 break;
403 case 'x':
404 snprintf(printfbuf, sizeof(
405 printfbuf), "%x", argdata);
406 break;
407 case 's':
408 /* Print a "%s" string. */
409 j = 0; ch3 = '\n';
410 while (ch2) {
411 ch2 = mem_readchar(cpu,
412 argreg, j++);
413 if (ch2) {
414 snprintf(
415 printfbuf +
416 strlen(
417 printfbuf),
418 sizeof(
419 printfbuf)-
420 1-strlen(
421 printfbuf),
422 "%c", ch2);
423 ch3 = ch2;
424 }
425 }
426 break;
427 }
428 argreg ++;
429 break;
430 default:
431 printf("[ unknown printf format char"
432 " '%c' ]", ch);
433 }
434 break;
435 case '\0':
436 break;
437 default:
438 snprintf(printfbuf, sizeof(printfbuf),
439 "%c", ch);
440 }
441
442 printfbuf[sizeof(printfbuf)-1] = '\0';
443
444 for (x=0; x<strlen(printfbuf); x++)
445 console_putchar(cpu->machine->
446 main_console_handle, printfbuf[x]);
447 }
448 if (cpu->machine->register_dump ||
449 cpu->machine->instruction_trace)
450 debug("\n");
451 fflush(stdout);
452 cpu->cd.mips.gpr[MIPS_GPR_V0] = 0;
453 break;
454 case 0x54: /* bootinit() */
455 /* debug("[ DEC PROM bootinit(0x%08x): TODO ]\n",
456 (int)cpu->cd.mips.gpr[MIPS_GPR_A0]); */
457 cpu->cd.mips.gpr[MIPS_GPR_V0] = 0;
458 break;
459 case 0x58: /* bootread(int b, void *buffer, int n) */
460 /*
461 * Read data from the boot device.
462 * b is a sector number (512 bytes per sector),
463 * buffer is the destination address, and n
464 * is the number of _bytes_ to read.
465 *
466 * TODO: Return value? NetBSD thinks that 0 is ok.
467 */
468 debug("[ DEC PROM bootread(0x%x, 0x%08x, 0x%x) ]\n",
469 (int)cpu->cd.mips.gpr[MIPS_GPR_A0],
470 (int)cpu->cd.mips.gpr[MIPS_GPR_A1],
471 (int)cpu->cd.mips.gpr[MIPS_GPR_A2]);
472
473 cpu->cd.mips.gpr[MIPS_GPR_V0] = 0;
474
475 if ((int32_t)cpu->cd.mips.gpr[MIPS_GPR_A2] > 0) {
476 int disk_id = diskimage_bootdev(cpu->machine, NULL);
477 int res;
478 unsigned char *tmp_buf;
479
480 tmp_buf = malloc(cpu->cd.mips.gpr[MIPS_GPR_A2]);
481 if (tmp_buf == NULL) {
482 fprintf(stderr, "[ *** Out of memory in "
483 "dec_prom.c, allocating %i bytes ]\n",
484 (int)cpu->cd.mips.gpr[MIPS_GPR_A2]);
485 break;
486 }
487
488 res = diskimage_access(cpu->machine, disk_id,
489 DISKIMAGE_SCSI, 0,
490 cpu->cd.mips.gpr[MIPS_GPR_A0] * 512, tmp_buf,
491 cpu->cd.mips.gpr[MIPS_GPR_A2]);
492
493 /* If the transfer was successful, transfer the data
494 to emulated memory: */
495 if (res) {
496 uint64_t dst = cpu->cd.mips.gpr[MIPS_GPR_A1];
497 if (dst < 0x80000000ULL)
498 dst |= 0x80000000;
499
500 store_buf(cpu, dst, (char *)tmp_buf,
501 cpu->cd.mips.gpr[MIPS_GPR_A2]);
502 cpu->cd.mips.gpr[MIPS_GPR_V0] =
503 cpu->cd.mips.gpr[MIPS_GPR_A2];
504 }
505
506 free(tmp_buf);
507 }
508 break;
509 case 0x64: /* getenv() */
510 /* Find the environment variable given by a0: */
511 for (i=0; i<sizeof(buf); i++)
512 cpu->memory_rw(cpu, cpu->mem,
513 cpu->cd.mips.gpr[MIPS_GPR_A0] + i, &buf[i],
514 sizeof(char), MEM_READ, CACHE_DATA | NO_EXCEPTIONS);
515 buf[sizeof(buf)-1] = '\0';
516 debug("[ DEC PROM getenv(\"%s\") ]\n", buf);
517 for (i=0; i<0x1000; i++) {
518 /* Matching string at offset i? */
519 int nmatches = 0;
520 for (j=0; j<strlen((char *)buf); j++) {
521 cpu->memory_rw(cpu, cpu->mem, (uint64_t)
522 (DEC_PROM_STRINGS + i + j), &ch2,
523 sizeof(char), MEM_READ, CACHE_DATA |
524 NO_EXCEPTIONS);
525 if (ch2 == buf[j])
526 nmatches++;
527 }
528 cpu->memory_rw(cpu, cpu->mem,
529 (uint64_t)(DEC_PROM_STRINGS
530 + i + strlen((char *)buf)), &ch2, sizeof(char),
531 MEM_READ, CACHE_DATA | NO_EXCEPTIONS);
532 if (nmatches == strlen((char *)buf) && ch2 == '=') {
533 cpu->cd.mips.gpr[MIPS_GPR_V0] =
534 DEC_PROM_STRINGS + i +
535 strlen((char *)buf) + 1;
536 return 1;
537 }
538 }
539 /* Return NULL if string wasn't found. */
540 fatal("[ DEC PROM getenv(\"%s\"): WARNING: Not in "
541 "environment! ]\n", buf);
542 cpu->cd.mips.gpr[MIPS_GPR_V0] = 0;
543 break;
544 case 0x6c: /* ulong slot_address(int sn) */
545 debug("[ DEC PROM slot_address(%i) ]\n",
546 (int)cpu->cd.mips.gpr[MIPS_GPR_A0]);
547 /* TODO: This is too hardcoded. */
548 /* TODO 2: Should these be physical or virtual addresses? */
549 switch (cpu->machine->machine_subtype) {
550 case MACHINE_DEC_3MAX_5000:
551 slot_base = KN02_PHYS_TC_0_START;/* 0x1e000000 */
552 slot_size = 4*1048576; /* 4 MB */
553 break;
554 case MACHINE_DEC_3MIN_5000:
555 slot_base = 0x10000000;
556 slot_size = 0x4000000; /* 64 MB */
557 break;
558 case MACHINE_DEC_3MAXPLUS_5000:
559 slot_base = 0x1e000000;
560 slot_size = 0x800000; /* 8 MB */
561 break;
562 case MACHINE_DEC_MAXINE_5000:
563 slot_base = 0x10000000;
564 slot_size = 0x4000000; /* 64 MB */
565 break;
566 default:
567 fatal("warning: DEC PROM slot_address() "
568 "unimplemented for this machine type\n");
569 }
570 cpu->cd.mips.gpr[MIPS_GPR_V0] = (int64_t)(int32_t)
571 (0x80000000 + slot_base + slot_size *
572 cpu->cd.mips.gpr[MIPS_GPR_A0]);
573 break;
574 case 0x70: /* wbflush() */
575 debug("[ DEC PROM wbflush(): TODO ]\n");
576 cpu->cd.mips.gpr[MIPS_GPR_V0] = 0;
577 break;
578 case 0x7c: /* clear_cache(addr, len) */
579 debug("[ DEC PROM clear_cache(0x%x,%i) ]\n",
580 (uint32_t)cpu->cd.mips.gpr[MIPS_GPR_A0],
581 (int)cpu->cd.mips.gpr[MIPS_GPR_A1]);
582 /* TODO */
583 cpu->cd.mips.gpr[MIPS_GPR_V0] = 0; /* ? */
584 break;
585 case 0x80: /* getsysid() */
586 /* debug("[ DEC PROM getsysid() ]\n"); */
587 /* TODO: why did I add the 0x82 stuff??? */
588 cpu->cd.mips.gpr[MIPS_GPR_V0] = ((uint32_t)0x82 << 24)
589 + (cpu->machine->machine_subtype << 16) + (0x3 << 8);
590 cpu->cd.mips.gpr[MIPS_GPR_V0] =
591 (int64_t)(int32_t)cpu->cd.mips.gpr[MIPS_GPR_V0];
592 break;
593 case 0x84: /* getbitmap() */
594 debug("[ DEC PROM getbitmap(0x%08x) ]\n",
595 (int)cpu->cd.mips.gpr[MIPS_GPR_A0]);
596 store_buf(cpu, cpu->cd.mips.gpr[MIPS_GPR_A0],
597 (char *)&memmap, sizeof(memmap));
598 cpu->cd.mips.gpr[MIPS_GPR_V0] = sizeof((memmap.bitmap));
599 break;
600 case 0x88: /* disableintr() */
601 debug("[ DEC PROM disableintr(): TODO ]\n");
602 cpu->cd.mips.gpr[MIPS_GPR_V0] = 0;
603 break;
604 case 0x8c: /* enableintr() */
605 debug("[ DEC PROM enableintr(): TODO ]\n");
606 cpu->cd.mips.gpr[MIPS_GPR_V0] = 0;
607 break;
608 case 0x9c: /* halt() */
609 debug("[ DEC PROM halt() ]\n");
610 cpu->machine->exit_without_entering_debugger = 1;
611 cpu->running = 0;
612 cpu->dead = 1;
613 break;
614 case 0xa4: /* gettcinfo() */
615 /*
616 * These are just bogus values... TODO
617 *
618 * 0: revision
619 * 4: clock period in nano seconds
620 * 8: slot size in megabytes TODO: not same for all models!
621 * 12: I/O timeout in cycles
622 * 16: DMA address range in megabytes
623 * 20: maximum DMA burst length
624 * 24: turbochannel parity (yes = 1)
625 * 28: reserved
626 */
627 store_32bit_word(cpu, DEC_PROM_TCINFO + 0, 0);
628 store_32bit_word(cpu, DEC_PROM_TCINFO + 4, 50);
629 store_32bit_word(cpu, DEC_PROM_TCINFO + 8, 4);
630 store_32bit_word(cpu, DEC_PROM_TCINFO + 12, 10);
631 store_32bit_word(cpu, DEC_PROM_TCINFO + 16, 1);
632 store_32bit_word(cpu, DEC_PROM_TCINFO + 20, 100);
633 store_32bit_word(cpu, DEC_PROM_TCINFO + 24, 0);
634 store_32bit_word(cpu, DEC_PROM_TCINFO + 28, 0);
635 cpu->cd.mips.gpr[MIPS_GPR_V0] = DEC_PROM_TCINFO;
636 break;
637 case 0xa8: /* int execute_cmd(char *) */
638 i = 0;
639 while ((ch = mem_readchar(cpu, MIPS_GPR_A0, i++)) != '\0')
640 console_putchar(cpu->machine->main_console_handle, ch);
641 console_putchar(cpu->machine->main_console_handle, '\n');
642 cpu->cd.mips.gpr[MIPS_GPR_V0] = 0;
643 break;
644 case 0xac: /* rex() */
645 debug("[ DEC PROM rex('%c') ]\n",
646 (int)cpu->cd.mips.gpr[MIPS_GPR_A0]);
647 switch (cpu->cd.mips.gpr[MIPS_GPR_A0]) {
648 case 'h':
649 debug("DEC PROM: rex('h') ==> halt\n");
650 cpu->machine->exit_without_entering_debugger = 1;
651 cpu->running = 0;
652 cpu->dead = 1;
653 break;
654 case 'b':
655 debug("DEC PROM: rex('b') ==> reboot: TODO "
656 "(halting CPU instead)\n");
657 cpu->machine->exit_without_entering_debugger = 1;
658 cpu->running = 0;
659 cpu->dead = 1;
660 break;
661 default:
662 fatal("DEC prom emulation: unknown rex() a0=0x%llx ("
663 "'%c')\n", (long long)cpu->cd.mips.gpr[MIPS_GPR_A0],
664 (char)cpu->cd.mips.gpr[MIPS_GPR_A0]);
665 cpu->running = 0;
666 cpu->dead = 1;
667 }
668 break;
669 default:
670 cpu_register_dump(cpu->machine, cpu, 1, 0x1);
671 printf("a0 points to: ");
672 for (i=0; i<40; i++) {
673 unsigned char ch = '\0';
674 cpu->memory_rw(cpu, cpu->mem,
675 cpu->cd.mips.gpr[MIPS_GPR_A0] + i, &ch,
676 sizeof(ch), MEM_READ, CACHE_DATA | NO_EXCEPTIONS);
677 if (ch >= ' ' && ch < 126)
678 printf("%c", ch);
679 else
680 printf("[%02x]", ch);
681 }
682 printf("\n");
683 fatal("PROM emulation: unimplemented callback vector 0x%x\n",
684 vector);
685 cpu->running = 0;
686 cpu->dead = 1;
687 }
688
689 return 1;
690 }
691

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