| 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 |
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* 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) |
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 23 |
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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* SUCH DAMAGE. |
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* |
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* |
| 28 |
* $Id: dec_prom.c,v 1.58 2005/05/15 01:55:49 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() |
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* 0x68 13 putchar() |
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* 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; |
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break; |
| 107 |
case 0x10: /* restart() */ |
| 108 |
/* TODO */ |
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cpu->machine->exit_without_entering_debugger = 1; |
| 110 |
cpu->running = 0; |
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cpu->dead = 1; |
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break; |
| 113 |
case 0x18: /* reinit() */ |
| 114 |
/* TODO */ |
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cpu->machine->exit_without_entering_debugger = 1; |
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cpu->cd.mips.gpr[MIPS_GPR_V0] = 0; |
| 117 |
break; |
| 118 |
case 0x30: /* open() */ |
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/* |
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* 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 |
} |
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|
| 164 |
free(tmp_buf); |
| 165 |
} |
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break; |
| 167 |
case 0x58: /* lseek(handle, offset[, whence]) */ |
| 168 |
/* TODO */ |
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if (cpu->cd.mips.gpr[MIPS_GPR_A2] == 0) |
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current_file_offset = cpu->cd.mips.gpr[MIPS_GPR_A1]; |
| 171 |
else |
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fatal("WARNING! Unimplemented whence in " |
| 173 |
"dec_jumptable_func()\n"); |
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cpu->cd.mips.gpr[MIPS_GPR_V0] = 0; |
| 175 |
break; |
| 176 |
case 0x68: /* putchar() */ |
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console_putchar(cpu->machine->main_console_handle, |
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cpu->cd.mips.gpr[MIPS_GPR_A0]); |
| 179 |
break; |
| 180 |
case 0x88: /* printf() */ |
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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) |
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printf("%c", ch); |
| 194 |
else |
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printf("[%02x]", ch); |
| 196 |
} |
| 197 |
printf("\n"); |
| 198 |
fatal("PROM emulation: unimplemented JUMP TABLE vector " |
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"0x%x (decimal function %i)\n", vector, vector/8); |
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cpu->running = 0; |
| 201 |
cpu->dead = 1; |
| 202 |
} |
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|
| 204 |
return 0; |
| 205 |
} |
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|
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|
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/* |
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* decstation_prom_emul(): |
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* |
| 211 |
* DECstation PROM emulation. |
| 212 |
* |
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* Callback functions: |
| 214 |
* 0x0c strcmp() |
| 215 |
* 0x14 strlen() |
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* 0x24 getchar() |
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* 0x28 gets() |
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* 0x2c puts() |
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* 0x30 printf() |
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* 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 |
strcpy(printfbuf, "%%"); |
| 367 |
break; |
| 368 |
case 'c': |
| 369 |
case 'd': |
| 370 |
case 's': |
| 371 |
case 'x': |
| 372 |
/* Get argument: */ |
| 373 |
if (argreg > MIPS_GPR_A3) { |
| 374 |
#if 1 |
| 375 |
/* Linux booters seem to go |
| 376 |
over the edge sometimes: */ |
| 377 |
ch = '\0'; |
| 378 |
strcpy(printfbuf, "[...]\n"); |
| 379 |
#else |
| 380 |
printf("[ decstation_prom_emul" |
| 381 |
"(): too many arguments ]"); |
| 382 |
/* This reuses the last arg, |
| 383 |
which is utterly incorrect. |
| 384 |
(TODO) */ |
| 385 |
argreg = MIPS_GPR_A3; |
| 386 |
#endif |
| 387 |
} |
| 388 |
|
| 389 |
ch2 = argdata = |
| 390 |
cpu->cd.mips.gpr[argreg]; |
| 391 |
|
| 392 |
switch (ch) { |
| 393 |
case 'c': |
| 394 |
sprintf(printfbuf, "%c", ch2); |
| 395 |
break; |
| 396 |
case 'd': |
| 397 |
sprintf(printfbuf, "%d", |
| 398 |
argdata); |
| 399 |
break; |
| 400 |
case 'x': |
| 401 |
sprintf(printfbuf, "%x", |
| 402 |
argdata); |
| 403 |
break; |
| 404 |
case 's': |
| 405 |
/* Print a "%s" string. */ |
| 406 |
j = 0; ch3 = '\n'; |
| 407 |
while (ch2) { |
| 408 |
ch2 = mem_readchar(cpu, |
| 409 |
argreg, j++); |
| 410 |
if (ch2) { |
| 411 |
snprintf( |
| 412 |
printfbuf + |
| 413 |
strlen( |
| 414 |
printfbuf), |
| 415 |
sizeof( |
| 416 |
printfbuf)- |
| 417 |
1-strlen( |
| 418 |
printfbuf), |
| 419 |
"%c", ch2); |
| 420 |
ch3 = ch2; |
| 421 |
} |
| 422 |
} |
| 423 |
break; |
| 424 |
} |
| 425 |
argreg ++; |
| 426 |
break; |
| 427 |
default: |
| 428 |
printf("[ unknown printf format char" |
| 429 |
" '%c' ]", ch); |
| 430 |
} |
| 431 |
break; |
| 432 |
case '\0': |
| 433 |
break; |
| 434 |
default: |
| 435 |
sprintf(printfbuf, "%c", ch); |
| 436 |
} |
| 437 |
|
| 438 |
printfbuf[sizeof(printfbuf)-1] = '\0'; |
| 439 |
|
| 440 |
for (x=0; x<strlen(printfbuf); x++) |
| 441 |
console_putchar(cpu->machine-> |
| 442 |
main_console_handle, printfbuf[x]); |
| 443 |
} |
| 444 |
if (cpu->machine->register_dump || |
| 445 |
cpu->machine->instruction_trace) |
| 446 |
debug("\n"); |
| 447 |
fflush(stdout); |
| 448 |
cpu->cd.mips.gpr[MIPS_GPR_V0] = 0; |
| 449 |
break; |
| 450 |
case 0x54: /* bootinit() */ |
| 451 |
/* debug("[ DEC PROM bootinit(0x%08x): TODO ]\n", |
| 452 |
(int)cpu->cd.mips.gpr[MIPS_GPR_A0]); */ |
| 453 |
cpu->cd.mips.gpr[MIPS_GPR_V0] = 0; |
| 454 |
break; |
| 455 |
case 0x58: /* bootread(int b, void *buffer, int n) */ |
| 456 |
/* |
| 457 |
* Read data from the boot device. |
| 458 |
* b is a sector number (512 bytes per sector), |
| 459 |
* buffer is the destination address, and n |
| 460 |
* is the number of _bytes_ to read. |
| 461 |
* |
| 462 |
* TODO: Return value? NetBSD thinks that 0 is ok. |
| 463 |
*/ |
| 464 |
debug("[ DEC PROM bootread(0x%x, 0x%08x, 0x%x) ]\n", |
| 465 |
(int)cpu->cd.mips.gpr[MIPS_GPR_A0], |
| 466 |
(int)cpu->cd.mips.gpr[MIPS_GPR_A1], |
| 467 |
(int)cpu->cd.mips.gpr[MIPS_GPR_A2]); |
| 468 |
|
| 469 |
cpu->cd.mips.gpr[MIPS_GPR_V0] = 0; |
| 470 |
|
| 471 |
if ((int32_t)cpu->cd.mips.gpr[MIPS_GPR_A2] > 0) { |
| 472 |
int disk_id = diskimage_bootdev(cpu->machine, NULL); |
| 473 |
int res; |
| 474 |
unsigned char *tmp_buf; |
| 475 |
|
| 476 |
tmp_buf = malloc(cpu->cd.mips.gpr[MIPS_GPR_A2]); |
| 477 |
if (tmp_buf == NULL) { |
| 478 |
fprintf(stderr, "[ *** Out of memory in " |
| 479 |
"dec_prom.c, allocating %i bytes ]\n", |
| 480 |
(int)cpu->cd.mips.gpr[MIPS_GPR_A2]); |
| 481 |
break; |
| 482 |
} |
| 483 |
|
| 484 |
res = diskimage_access(cpu->machine, disk_id, |
| 485 |
DISKIMAGE_SCSI, 0, |
| 486 |
cpu->cd.mips.gpr[MIPS_GPR_A0] * 512, tmp_buf, |
| 487 |
cpu->cd.mips.gpr[MIPS_GPR_A2]); |
| 488 |
|
| 489 |
/* If the transfer was successful, transfer the data |
| 490 |
to emulated memory: */ |
| 491 |
if (res) { |
| 492 |
uint64_t dst = cpu->cd.mips.gpr[MIPS_GPR_A1]; |
| 493 |
if (dst < 0x80000000ULL) |
| 494 |
dst |= 0x80000000; |
| 495 |
|
| 496 |
store_buf(cpu, dst, (char *)tmp_buf, |
| 497 |
cpu->cd.mips.gpr[MIPS_GPR_A2]); |
| 498 |
cpu->cd.mips.gpr[MIPS_GPR_V0] = |
| 499 |
cpu->cd.mips.gpr[MIPS_GPR_A2]; |
| 500 |
} |
| 501 |
|
| 502 |
free(tmp_buf); |
| 503 |
} |
| 504 |
break; |
| 505 |
case 0x64: /* getenv() */ |
| 506 |
/* Find the environment variable given by a0: */ |
| 507 |
for (i=0; i<sizeof(buf); i++) |
| 508 |
cpu->memory_rw(cpu, cpu->mem, |
| 509 |
cpu->cd.mips.gpr[MIPS_GPR_A0] + i, &buf[i], |
| 510 |
sizeof(char), MEM_READ, CACHE_DATA | NO_EXCEPTIONS); |
| 511 |
buf[sizeof(buf)-1] = '\0'; |
| 512 |
debug("[ DEC PROM getenv(\"%s\") ]\n", buf); |
| 513 |
for (i=0; i<0x1000; i++) { |
| 514 |
/* Matching string at offset i? */ |
| 515 |
int nmatches = 0; |
| 516 |
for (j=0; j<strlen((char *)buf); j++) { |
| 517 |
cpu->memory_rw(cpu, cpu->mem, (uint64_t) |
| 518 |
(DEC_PROM_STRINGS + i + j), &ch2, |
| 519 |
sizeof(char), MEM_READ, CACHE_DATA | |
| 520 |
NO_EXCEPTIONS); |
| 521 |
if (ch2 == buf[j]) |
| 522 |
nmatches++; |
| 523 |
} |
| 524 |
cpu->memory_rw(cpu, cpu->mem, |
| 525 |
(uint64_t)(DEC_PROM_STRINGS |
| 526 |
+ i + strlen((char *)buf)), &ch2, sizeof(char), |
| 527 |
MEM_READ, CACHE_DATA | NO_EXCEPTIONS); |
| 528 |
if (nmatches == strlen((char *)buf) && ch2 == '=') { |
| 529 |
cpu->cd.mips.gpr[MIPS_GPR_V0] = |
| 530 |
DEC_PROM_STRINGS + i + |
| 531 |
strlen((char *)buf) + 1; |
| 532 |
return 1; |
| 533 |
} |
| 534 |
} |
| 535 |
/* Return NULL if string wasn't found. */ |
| 536 |
fatal("[ DEC PROM getenv(\"%s\"): WARNING: Not in " |
| 537 |
"environment! ]\n", buf); |
| 538 |
cpu->cd.mips.gpr[MIPS_GPR_V0] = 0; |
| 539 |
break; |
| 540 |
case 0x6c: /* ulong slot_address(int sn) */ |
| 541 |
debug("[ DEC PROM slot_address(%i) ]\n", |
| 542 |
(int)cpu->cd.mips.gpr[MIPS_GPR_A0]); |
| 543 |
/* TODO: This is too hardcoded. */ |
| 544 |
/* TODO 2: Should these be physical or virtual addresses? */ |
| 545 |
switch (cpu->machine->machine_subtype) { |
| 546 |
case MACHINE_DEC_3MAX_5000: |
| 547 |
slot_base = KN02_PHYS_TC_0_START;/* 0x1e000000 */ |
| 548 |
slot_size = 4*1048576; /* 4 MB */ |
| 549 |
break; |
| 550 |
case MACHINE_DEC_3MIN_5000: |
| 551 |
slot_base = 0x10000000; |
| 552 |
slot_size = 0x4000000; /* 64 MB */ |
| 553 |
break; |
| 554 |
case MACHINE_DEC_3MAXPLUS_5000: |
| 555 |
slot_base = 0x1e000000; |
| 556 |
slot_size = 0x800000; /* 8 MB */ |
| 557 |
break; |
| 558 |
case MACHINE_DEC_MAXINE_5000: |
| 559 |
slot_base = 0x10000000; |
| 560 |
slot_size = 0x4000000; /* 64 MB */ |
| 561 |
break; |
| 562 |
default: |
| 563 |
fatal("warning: DEC PROM slot_address() " |
| 564 |
"unimplemented for this machine type\n"); |
| 565 |
} |
| 566 |
cpu->cd.mips.gpr[MIPS_GPR_V0] = (int64_t)(int32_t) |
| 567 |
(0x80000000 + slot_base + slot_size * |
| 568 |
cpu->cd.mips.gpr[MIPS_GPR_A0]); |
| 569 |
break; |
| 570 |
case 0x70: /* wbflush() */ |
| 571 |
debug("[ DEC PROM wbflush(): TODO ]\n"); |
| 572 |
cpu->cd.mips.gpr[MIPS_GPR_V0] = 0; |
| 573 |
break; |
| 574 |
case 0x7c: /* clear_cache(addr, len) */ |
| 575 |
debug("[ DEC PROM clear_cache(0x%x,%i) ]\n", |
| 576 |
(uint32_t)cpu->cd.mips.gpr[MIPS_GPR_A0], |
| 577 |
(int)cpu->cd.mips.gpr[MIPS_GPR_A1]); |
| 578 |
/* TODO */ |
| 579 |
cpu->cd.mips.gpr[MIPS_GPR_V0] = 0; /* ? */ |
| 580 |
break; |
| 581 |
case 0x80: /* getsysid() */ |
| 582 |
/* debug("[ DEC PROM getsysid() ]\n"); */ |
| 583 |
/* TODO: why did I add the 0x82 stuff??? */ |
| 584 |
cpu->cd.mips.gpr[MIPS_GPR_V0] = ((uint32_t)0x82 << 24) |
| 585 |
+ (cpu->machine->machine_subtype << 16) + (0x3 << 8); |
| 586 |
cpu->cd.mips.gpr[MIPS_GPR_V0] = |
| 587 |
(int64_t)(int32_t)cpu->cd.mips.gpr[MIPS_GPR_V0]; |
| 588 |
break; |
| 589 |
case 0x84: /* getbitmap() */ |
| 590 |
debug("[ DEC PROM getbitmap(0x%08x) ]\n", |
| 591 |
(int)cpu->cd.mips.gpr[MIPS_GPR_A0]); |
| 592 |
store_buf(cpu, cpu->cd.mips.gpr[MIPS_GPR_A0], |
| 593 |
(char *)&memmap, sizeof(memmap)); |
| 594 |
cpu->cd.mips.gpr[MIPS_GPR_V0] = sizeof((memmap.bitmap)); |
| 595 |
break; |
| 596 |
case 0x88: /* disableintr() */ |
| 597 |
debug("[ DEC PROM disableintr(): TODO ]\n"); |
| 598 |
cpu->cd.mips.gpr[MIPS_GPR_V0] = 0; |
| 599 |
break; |
| 600 |
case 0x8c: /* enableintr() */ |
| 601 |
debug("[ DEC PROM enableintr(): TODO ]\n"); |
| 602 |
cpu->cd.mips.gpr[MIPS_GPR_V0] = 0; |
| 603 |
break; |
| 604 |
case 0x9c: /* halt() */ |
| 605 |
debug("[ DEC PROM halt() ]\n"); |
| 606 |
cpu->machine->exit_without_entering_debugger = 1; |
| 607 |
cpu->running = 0; |
| 608 |
cpu->dead = 1; |
| 609 |
break; |
| 610 |
case 0xa4: /* gettcinfo() */ |
| 611 |
/* |
| 612 |
* These are just bogus values... TODO |
| 613 |
* |
| 614 |
* 0: revision |
| 615 |
* 4: clock period in nano seconds |
| 616 |
* 8: slot size in megabytes TODO: not same for all models! |
| 617 |
* 12: I/O timeout in cycles |
| 618 |
* 16: DMA address range in megabytes |
| 619 |
* 20: maximum DMA burst length |
| 620 |
* 24: turbochannel parity (yes = 1) |
| 621 |
* 28: reserved |
| 622 |
*/ |
| 623 |
store_32bit_word(cpu, DEC_PROM_TCINFO + 0, 0); |
| 624 |
store_32bit_word(cpu, DEC_PROM_TCINFO + 4, 50); |
| 625 |
store_32bit_word(cpu, DEC_PROM_TCINFO + 8, 4); |
| 626 |
store_32bit_word(cpu, DEC_PROM_TCINFO + 12, 10); |
| 627 |
store_32bit_word(cpu, DEC_PROM_TCINFO + 16, 1); |
| 628 |
store_32bit_word(cpu, DEC_PROM_TCINFO + 20, 100); |
| 629 |
store_32bit_word(cpu, DEC_PROM_TCINFO + 24, 0); |
| 630 |
store_32bit_word(cpu, DEC_PROM_TCINFO + 28, 0); |
| 631 |
cpu->cd.mips.gpr[MIPS_GPR_V0] = DEC_PROM_TCINFO; |
| 632 |
break; |
| 633 |
case 0xa8: /* int execute_cmd(char *) */ |
| 634 |
i = 0; |
| 635 |
while ((ch = mem_readchar(cpu, MIPS_GPR_A0, i++)) != '\0') |
| 636 |
console_putchar(cpu->machine->main_console_handle, ch); |
| 637 |
console_putchar(cpu->machine->main_console_handle, '\n'); |
| 638 |
cpu->cd.mips.gpr[MIPS_GPR_V0] = 0; |
| 639 |
break; |
| 640 |
case 0xac: /* rex() */ |
| 641 |
debug("[ DEC PROM rex('%c') ]\n", |
| 642 |
(int)cpu->cd.mips.gpr[MIPS_GPR_A0]); |
| 643 |
switch (cpu->cd.mips.gpr[MIPS_GPR_A0]) { |
| 644 |
case 'h': |
| 645 |
debug("DEC PROM: rex('h') ==> halt\n"); |
| 646 |
cpu->machine->exit_without_entering_debugger = 1; |
| 647 |
cpu->running = 0; |
| 648 |
cpu->dead = 1; |
| 649 |
break; |
| 650 |
case 'b': |
| 651 |
debug("DEC PROM: rex('b') ==> reboot: TODO " |
| 652 |
"(halting CPU instead)\n"); |
| 653 |
cpu->machine->exit_without_entering_debugger = 1; |
| 654 |
cpu->running = 0; |
| 655 |
cpu->dead = 1; |
| 656 |
break; |
| 657 |
default: |
| 658 |
fatal("DEC prom emulation: unknown rex() a0=0x%llx (" |
| 659 |
"'%c')\n", (long long)cpu->cd.mips.gpr[MIPS_GPR_A0], |
| 660 |
(char)cpu->cd.mips.gpr[MIPS_GPR_A0]); |
| 661 |
cpu->running = 0; |
| 662 |
cpu->dead = 1; |
| 663 |
} |
| 664 |
break; |
| 665 |
default: |
| 666 |
cpu_register_dump(cpu->machine, cpu, 1, 0x1); |
| 667 |
printf("a0 points to: "); |
| 668 |
for (i=0; i<40; i++) { |
| 669 |
unsigned char ch = '\0'; |
| 670 |
cpu->memory_rw(cpu, cpu->mem, |
| 671 |
cpu->cd.mips.gpr[MIPS_GPR_A0] + i, &ch, |
| 672 |
sizeof(ch), MEM_READ, CACHE_DATA | NO_EXCEPTIONS); |
| 673 |
if (ch >= ' ' && ch < 126) |
| 674 |
printf("%c", ch); |
| 675 |
else |
| 676 |
printf("[%02x]", ch); |
| 677 |
} |
| 678 |
printf("\n"); |
| 679 |
fatal("PROM emulation: unimplemented callback vector 0x%x\n", |
| 680 |
vector); |
| 681 |
cpu->running = 0; |
| 682 |
cpu->dead = 1; |
| 683 |
} |
| 684 |
|
| 685 |
return 1; |
| 686 |
} |
| 687 |
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