git.sesse.net Git - pistorm/blob - platforms/amiga/pistorm-dev/pistorm-dev.c

   1 // SPDX-License-Identifier: MIT
   2
   3 #include <stdio.h>
   4 #include <stdlib.h>
   5 #include <string.h>
   6 #include <time.h>
   7
   8 #include "pistorm-dev.h"
   9 #include "pistorm-dev-enums.h"
  10 #include "platforms/platforms.h"
  11 #include "gpio/ps_protocol.h"
  12 #include "platforms/amiga/rtg/rtg.h"
  13 #include "platforms/amiga/piscsi/piscsi.h"
  14 #include "platforms/amiga/net/pi-net.h"
  15
  16 #include <linux/reboot.h>
  17 #include <sys/reboot.h>
  18
  19 #define DEBUG_PISTORM_DEVICE
  20
  21 #ifdef DEBUG_PISTORM_DEVICE
  22 #define DEBUG printf
  23
  24 #define PIDEV_SWREV 0x0105
  25
  26 static const char *op_type_names[4] = {
  27     "BYTE",
  28     "WORD",
  29     "LONGWORD",
  30     "MEM",
  31 };
  32 #else
  33 #define DEBUG(...)
  34 #endif
  35
  36 extern uint32_t pistorm_dev_base;
  37 extern uint32_t do_reset;
  38
  39 extern void adjust_ranges_amiga(struct emulator_config *cfg);
  40 extern uint8_t rtg_enabled, rtg_on, pinet_enabled, piscsi_enabled, load_new_config, end_signal;
  41 extern struct emulator_config *cfg;
  42
  43 char cfg_filename[256] = "default.cfg";
  44 char tmp_string[256];
  45
  46 static uint8_t pi_byte[32];
  47 static uint16_t pi_word[32];
  48 static uint32_t pi_longword[32];
  49 static uint32_t pi_string[32];
  50 static uint32_t pi_ptr[32];
  51
  52 static uint32_t pi_dbg_val[32];
  53 static uint32_t pi_dbg_string[32];
  54
  55 static uint32_t pi_cmd_result = 0, shutdown_confirm = 0xFFFFFFFF;
  56
  57 int32_t grab_amiga_string(uint32_t addr, uint8_t *dest, uint32_t str_max_len) {
  58     int32_t r = get_mapped_item_by_address(cfg, addr);
  59     uint32_t index = 0;
  60
  61     if (r == -1) {
  62         DEBUG("[GRAB_AMIGA_STRING] No mapped range found for address $%.8X. Grabbing string data over the bus.\n", addr);
  63         do {
  64             dest[index] = (unsigned char)m68k_read_memory_8(addr + index);
  65             index++;
  66         } while (dest[index - 1] != 0x00 && index < str_max_len);
  67     }
  68     else {
  69         uint8_t *src = cfg->map_data[r] + (addr - cfg->map_offset[r]);
  70         do {
  71             dest[index] = src[index];
  72             index++;
  73         } while (dest[index - 1] != 0x00 && index < str_max_len);
  74     }
  75     if (index == str_max_len) {
  76         memset(dest, 0x00, str_max_len + 1);
  77         return -1;
  78     }
  79     DEBUG("[GRAB_AMIGA_STRING] Grabbed string: %s\n", dest);
  80     return (int32_t)strlen((const char*)dest);
  81 }
  82
  83 int32_t amiga_transfer_file(uint32_t addr, char *filename) {
  84     FILE *in = fopen(filename, "rb");
  85     if (in == NULL) {
  86         DEBUG("[AMIGA_TRANSFER_FILE] Failed to open file %s for reading.\n", filename);
  87         return -1;
  88     }
  89     fseek(in, 0, SEEK_END);
  90
  91     int32_t r = get_mapped_item_by_address(cfg, addr);
  92     uint32_t filesize = ftell(in);
  93
  94     fseek(in, 0, SEEK_SET);
  95     if (r == -1) {
  96         DEBUG("[GRAB_AMIGA_STRING] No mapped range found for address $%.8X. Transferring file data over the bus.\n", addr);
  97         uint8_t tmp_read = 0;
  98
  99         for (uint32_t i = 0; i < filesize; i++) {
 100             tmp_read = (uint8_t)fgetc(in);
 101             m68k_write_memory_8(addr + i, tmp_read);
 102         }
 103     } else {
 104         uint8_t *dst = cfg->map_data[r] + (addr - cfg->map_offset[r]);
 105         fread(dst, filesize, 1, in);
 106     }
 107     fclose(in);
 108     DEBUG("[AMIGA_TRANSFER_FILE] Copied %d bytes to address $%.8X.\n", filesize, addr);
 109
 110     return 0;
 111 }
 112
 113 char *get_pistorm_devcfg_filename() {
 114     return cfg_filename;
 115 }
 116
 117 void set_pistorm_devcfg_filename(char *filename) {
 118     strcpy(cfg_filename, filename);
 119 }
 120
 121 void handle_pistorm_dev_write(uint32_t addr_, uint32_t val, uint8_t type) {
 122     uint32_t addr = (addr_ & 0xFFFF);
 123
 124     switch((addr)) {
 125         case PI_DBG_MSG:
 126             // Output debug message based on value written and data in val/str registers.
 127             break;
 128         case PI_DBG_VAL1: case PI_DBG_VAL2: case PI_DBG_VAL3: case PI_DBG_VAL4:
 129         case PI_DBG_VAL5: case PI_DBG_VAL6: case PI_DBG_VAL7: case PI_DBG_VAL8:
 130             DEBUG("[PISTORM-DEV] Set DEBUG VALUE %d to %d ($%.8X)\n", (addr - PI_DBG_VAL1) / 4, val, val);
 131             pi_dbg_val[(addr - PI_DBG_VAL1) / 4] = val;
 132             break;
 133         case PI_DBG_STR1: case PI_DBG_STR2: case PI_DBG_STR3: case PI_DBG_STR4:
 134             DEBUG("[PISTORM-DEV] Set DEBUG STRING POINTER %d to $%.8X\n", (addr - PI_DBG_STR1) / 4, val);
 135             pi_dbg_string[(addr - PI_DBG_STR1) / 4] = val;
 136             break;
 137
 138         case PI_BYTE1: case PI_BYTE2: case PI_BYTE3: case PI_BYTE4:
 139         case PI_BYTE5: case PI_BYTE6: case PI_BYTE7: case PI_BYTE8:
 140             DEBUG("[PISTORM-DEV] Set BYTE %d to %d ($%.2X)\n", addr - PI_BYTE1, (val & 0xFF), (val & 0xFF));
 141             pi_byte[addr - PI_BYTE1] = (val & 0xFF);
 142             break;
 143         case PI_WORD1: case PI_WORD2: case PI_WORD3: case PI_WORD4:
 144             //DEBUG("[PISTORM-DEV] Set WORD %d to %d ($%.4X)\n", (addr - PI_WORD1) / 2, (val & 0xFFFF), (val & 0xFFFF));
 145             pi_word[(addr - PI_WORD1) / 2] = (val & 0xFFFF);
 146             break;
 147         case PI_WORD5: case PI_WORD6: case PI_WORD7: case PI_WORD8:
 148         case PI_WORD9: case PI_WORD10: case PI_WORD11: case PI_WORD12:
 149             //DEBUG("[PISTORM-DEV] Set WORD %d to %d ($%.4X)\n", (addr - PI_WORD5) / 2, (val & 0xFFFF), (val & 0xFFFF));
 150             pi_word[(addr - PI_WORD5) / 2] = (val & 0xFFFF);
 151             break;
 152         case PI_LONGWORD1: case PI_LONGWORD2: case PI_LONGWORD3: case PI_LONGWORD4:
 153             //DEBUG("[PISTORM-DEV] Set LONGWORD %d to %d ($%.8X)\n", (addr - PI_LONGWORD1) / 4, val, val);
 154             pi_longword[(addr - PI_LONGWORD1) / 4] = val;
 155             break;
 156         case PI_STR1: case PI_STR2: case PI_STR3: case PI_STR4:
 157             DEBUG("[PISTORM-DEV] Set STRING POINTER %d to $%.8X\n", (addr - PI_STR1) / 4, val);
 158             pi_string[(addr - PI_STR1) / 4] = val;
 159             break;
 160         case PI_PTR1: case PI_PTR2: case PI_PTR3: case PI_PTR4:
 161             //DEBUG("[PISTORM-DEV] Set DATA POINTER %d to $%.8X\n", (addr - PI_PTR1) / 4, val);
 162             pi_ptr[(addr - PI_PTR1) / 4] = val;
 163             break;
 164
 165         case PI_CMD_TRANSFERFILE:
 166             DEBUG("[PISTORM-DEV] Write to TRANSFERFILE.\n");
 167             if (pi_string[0] == 0 || grab_amiga_string(pi_string[0], (uint8_t *)tmp_string, 255) == -1)  {
 168                 printf("[PISTORM-DEV] No or invalid filename for TRANSFERFILE. Aborting.\n");
 169                 pi_cmd_result = PI_RES_INVALIDVALUE;
 170             } else if (pi_ptr[0] == 0) {
 171                 printf("[PISTORM-DEV] Null pointer specified for TRANSFERFILE destination. Aborting.\n");
 172                 pi_cmd_result = PI_RES_INVALIDVALUE;
 173             } else {
 174                 if (amiga_transfer_file(pi_ptr[0], tmp_string) == -1) {
 175                     pi_cmd_result = PI_RES_FAILED;
 176                 } else {
 177                     pi_cmd_result = PI_RES_OK;
 178                 }
 179             }
 180             pi_string[0] = 0;
 181             pi_ptr[0] = 0;
 182             break;
 183         case PI_CMD_MEMCPY:
 184             //DEBUG("[PISTORM-DEV} Write to MEMCPY: %d (%.8X)\n", val, val);
 185             if (pi_ptr[0] == 0 || pi_ptr[1] == 0) {
 186                 printf("[PISTORM-DEV] MEMCPY from/to null pointer not allowed. Aborting.\n");
 187                 pi_cmd_result = PI_RES_INVALIDVALUE;
 188             } else if (val == 0) {
 189                 printf("[PISTORM-DEV] MEMCPY called with size 0. Aborting.\n");
 190                 pi_cmd_result = PI_RES_INVALIDVALUE;
 191             } else {
 192                 int32_t src = get_mapped_item_by_address(cfg, pi_ptr[0]);
 193                 int32_t dst = get_mapped_item_by_address(cfg, pi_ptr[1]);
 194                 if (dst != -1 && src != -1) {
 195                     //printf("doing super memcpy\n");
 196                     uint8_t *src_ptr = &cfg->map_data[src][(pi_ptr[0] - cfg->map_offset[src])];
 197                     uint8_t *dst_ptr = &cfg->map_data[dst][(pi_ptr[1] - cfg->map_offset[dst])];
 198                     memcpy(dst_ptr, src_ptr, val);
 199                 } else {
 200                     printf("!!! doing manual memcpy\n");
 201                     uint8_t tmp = 0;
 202                     for (uint32_t i = 0; i < val; i++) {
 203                         if (src == -1) tmp = (unsigned char)m68k_read_memory_8(pi_ptr[0] + i);
 204                         else tmp = cfg->map_data[src][pi_ptr[0] - cfg->map_offset[src] + i];
 205
 206                         if (dst == -1) m68k_write_memory_8(pi_ptr[1] + i, tmp);
 207                         else cfg->map_data[dst][pi_ptr[1] - cfg->map_offset[dst] + i] = tmp;
 208                     }
 209                 }
 210                 //DEBUG("[PISTORM-DEV] Copied %d bytes from $%.8X to $%.8X\n", val, pi_ptr[0], pi_ptr[1]);
 211             }
 212             break;
 213         case PI_CMD_MEMSET:
 214             //DEBUG("[PISTORM-DEV} Write to MEMSET: %d (%.8X)\n", val, val);
 215             if (pi_ptr[0] == 0) {
 216                 printf("[PISTORM-DEV] MEMSET with null pointer not allowed. Aborting.\n");
 217                 pi_cmd_result = PI_RES_INVALIDVALUE;
 218             } else if (val == 0) {
 219                 printf("[PISTORM-DEV] MEMSET called with size 0. Aborting.\n");
 220                 pi_cmd_result = PI_RES_INVALIDVALUE;
 221             } else {
 222                 int32_t dst = get_mapped_item_by_address(cfg, pi_ptr[0]);
 223                 if (dst != -1) {
 224                     uint8_t *dst_ptr = &cfg->map_data[dst][(pi_ptr[0] - cfg->map_offset[dst])];
 225                     memset(dst_ptr, pi_byte[0], val);
 226                 } else {
 227                     for (uint32_t i = 0; i < val; i++) {
 228                         m68k_write_memory_8(pi_ptr[0] + i, val);
 229                     }
 230                 }
 231             }
 232             break;
 233         case PI_CMD_COPYRECT:
 234         case PI_CMD_COPYRECT_EX:
 235             if (pi_ptr[0] == 0 || pi_ptr[1] == 0) {
 236                 printf("[PISTORM-DEV] COPYRECT/EX from/to null pointer not allowed. Aborting.\n");
 237                 pi_cmd_result = PI_RES_INVALIDVALUE;
 238             } else if (pi_word[2] == 0 || pi_word[3] == 0) {
 239                 printf("[PISTORM-DEV] COPYRECT/EX called with a width/height of 0. Aborting.\n");
 240                 pi_cmd_result = PI_RES_INVALIDVALUE;
 241             } else {
 242                 int32_t src = get_mapped_item_by_address(cfg, pi_ptr[0]);
 243                 int32_t dst = get_mapped_item_by_address(cfg, pi_ptr[1]);
 244
 245                 if (dst != -1 && src != -1) {
 246                     uint8_t *src_ptr = &cfg->map_data[src][(pi_ptr[0] - cfg->map_offset[src])];
 247                     uint8_t *dst_ptr = &cfg->map_data[dst][(pi_ptr[1] - cfg->map_offset[dst])];
 248
 249                     if (addr == PI_CMD_COPYRECT_EX) {
 250                         // Adjust pointers in the case of available src/dst coordinates.
 251                         src_ptr += pi_word[4] + (pi_word[5] * pi_word[0]);
 252                         dst_ptr += pi_word[6] + (pi_word[7] * pi_word[1]);
 253                     }
 254
 255                     for (int i = 0; i < pi_word[3]; i++) {
 256                         memcpy(dst_ptr, src_ptr, pi_word[2]);
 257
 258                         src_ptr += pi_word[0];
 259                         dst_ptr += pi_word[1];
 260                     }
 261                 } else {
 262                     printf("!!! doing manual copyrect\n");
 263
 264                     if (addr != PI_CMD_COPYRECT_EX) {
 265                         // Clear out the src/dst coordinates in case something else set them previously.
 266                         pi_word[4] = pi_word[5] = pi_word[6] = pi_word[7] = 0;
 267                     }
 268
 269                     uint32_t src_offset = 0, dst_offset = 0;
 270                     uint8_t tmp = 0;
 271
 272                     if (addr == PI_CMD_COPYRECT_EX) {
 273                         src_offset += pi_word[4] + (pi_word[5] * pi_word[0]);
 274                         dst_offset += pi_word[6] + (pi_word[7] * pi_word[1]);
 275                     }
 276
 277                     for (uint32_t y = 0; y < pi_word[3]; y++) {
 278                         for (uint32_t x = 0; x < pi_word[2]; x++) {
 279                             if (src == -1) tmp = (unsigned char)m68k_read_memory_8(pi_ptr[0] + src_offset + x);
 280                             else tmp = cfg->map_data[src][(pi_ptr[0] + src_offset + x) - cfg->map_offset[src]];
 281
 282                             if (dst == -1) m68k_write_memory_8(pi_ptr[1] + dst_offset + x, tmp);
 283                             else cfg->map_data[dst][(pi_ptr[1] + dst_offset + x) - cfg->map_offset[dst]] = tmp;
 284                         }
 285                         src_offset += pi_word[0];
 286                         dst_offset += pi_word[1];
 287                     }
 288                 }
 289             }
 290             break;
 291
 292         case PI_CMD_RTGSTATUS:
 293             DEBUG("[PISTORM-DEV] Write to RTGSTATUS: %d\n", val);
 294             if (val == 1 && !rtg_enabled) {
 295                 init_rtg_data(cfg);
 296                 rtg_enabled = 1;
 297                 pi_cmd_result = PI_RES_OK;
 298             } else if (val == 0 && rtg_enabled) {
 299                 if (!rtg_on) {
 300                     shutdown_rtg();
 301                     rtg_enabled = 0;
 302                     pi_cmd_result = PI_RES_OK;
 303                 } else {
 304                     // Refuse to disable RTG if it's currently in use.
 305                     pi_cmd_result = PI_RES_FAILED;
 306                 }
 307             } else {
 308                 pi_cmd_result = PI_RES_NOCHANGE;
 309             }
 310             adjust_ranges_amiga(cfg);
 311             break;
 312         case PI_CMD_NETSTATUS:
 313             DEBUG("[PISTORM-DEV] Write to NETSTATUS: %d\n", val);
 314             if (val == 1 && !pinet_enabled) {
 315                 pinet_init(NULL);
 316                 pinet_enabled = 1;
 317                 pi_cmd_result = PI_RES_OK;
 318             } else if (val == 0 && pinet_enabled) {
 319                 pinet_shutdown();
 320                 pinet_enabled = 0;
 321                 pi_cmd_result = PI_RES_OK;
 322             } else {
 323                 pi_cmd_result = PI_RES_NOCHANGE;
 324             }
 325             adjust_ranges_amiga(cfg);
 326             break;
 327         case PI_CMD_PISCSI_CTRL:
 328             DEBUG("[PISTORM-DEV] Write to PISCSI_CTRL: ");
 329             switch(val) {
 330                 case PISCSI_CTRL_DISABLE:
 331                     DEBUG("DISABLE\n");
 332                     if (piscsi_enabled) {
 333                         piscsi_shutdown();
 334                         piscsi_enabled = 0;
 335                         // Probably not OK... depends on if you booted from floppy, I guess.
 336                         pi_cmd_result = PI_RES_OK;
 337                     } else {
 338                         pi_cmd_result = PI_RES_NOCHANGE;
 339                     }
 340                     break;
 341                 case PISCSI_CTRL_ENABLE:
 342                     DEBUG("ENABLE\n");
 343                     if (!piscsi_enabled) {
 344                         piscsi_init();
 345                         piscsi_enabled = 1;
 346                         piscsi_refresh_drives();
 347                         pi_cmd_result = PI_RES_OK;
 348                     } else {
 349                         pi_cmd_result = PI_RES_NOCHANGE;
 350                     }
 351                     break;
 352                 case PISCSI_CTRL_MAP:
 353                     DEBUG("MAP\n");
 354                     if (pi_string[0] == 0 || grab_amiga_string(pi_string[0], (uint8_t *)tmp_string, 255) == -1)  {
 355                         printf("[PISTORM-DEV] Failed to grab string for PISCSI drive filename. Aborting.\n");
 356                         pi_cmd_result = PI_RES_FAILED;
 357                     } else {
 358                         FILE *tmp = fopen(tmp_string, "rb");
 359                         if (tmp == NULL) {
 360                             printf("[PISTORM-DEV] Failed to open file %s for PISCSI drive mapping. Aborting.\n", tmp_string);
 361                             pi_cmd_result = PI_RES_FILENOTFOUND;
 362                         } else {
 363                             fclose(tmp);
 364                             printf("[PISTORM-DEV] Attempting to map file %s as PISCSI drive %d...\n", tmp_string, pi_word[0]);
 365                             piscsi_unmap_drive(pi_word[0]);
 366                             piscsi_map_drive(tmp_string, pi_word[0]);
 367                             pi_cmd_result = PI_RES_OK;
 368                         }
 369                     }
 370                     pi_string[0] = 0;
 371                     break;
 372                 case PISCSI_CTRL_UNMAP:
 373                     DEBUG("UNMAP\n");
 374                     if (pi_word[0] > 7) {
 375                         printf("[PISTORM-DEV] Invalid drive ID %d for PISCSI unmap command.", pi_word[0]);
 376                         pi_cmd_result = PI_RES_INVALIDVALUE;
 377                     } else {
 378                         if (piscsi_get_dev(pi_word[0])->fd != -1) {
 379                             piscsi_unmap_drive(pi_word[0]);
 380                             pi_cmd_result = PI_RES_OK;
 381                         } else {
 382                             pi_cmd_result = PI_RES_NOCHANGE;
 383                         }
 384                     }
 385                     break;
 386                 case PISCSI_CTRL_EJECT:
 387                     DEBUG("EJECT (NYI)\n");
 388                     pi_cmd_result = PI_RES_NOCHANGE;
 389                     break;
 390                 case PISCSI_CTRL_INSERT:
 391                     DEBUG("INSERT (NYI)\n");
 392                     pi_cmd_result = PI_RES_NOCHANGE;
 393                     break;
 394                 default:
 395                     DEBUG("UNKNOWN/UNHANDLED. Aborting.\n");
 396                     pi_cmd_result = PI_RES_INVALIDVALUE;
 397                     break;
 398             }
 399             adjust_ranges_amiga(cfg);
 400             break;
 401
 402         case PI_CMD_KICKROM:
 403             DEBUG("[PISTORM-DEV] Write to KICKROM.\n");
 404             if (pi_string[0] == 0 || grab_amiga_string(pi_string[0], (uint8_t *)tmp_string, 255) == -1)  {
 405                 printf("[PISTORM-DEV] Failed to grab string KICKROM filename. Aborting.\n");
 406                 pi_cmd_result = PI_RES_FAILED;
 407             } else {
 408                 FILE *tmp = fopen(tmp_string, "rb");
 409                 if (tmp == NULL) {
 410                     printf("[PISTORM-DEV] Failed to open file %s for KICKROM mapping. Aborting.\n", tmp_string);
 411                     pi_cmd_result = PI_RES_FILENOTFOUND;
 412                 } else {
 413                     fclose(tmp);
 414                     if (get_named_mapped_item(cfg, "kickstart") != -1) {
 415                         uint32_t index = get_named_mapped_item(cfg, "kickstart");
 416                         free(cfg->map_data[index]);
 417                         free(cfg->map_id[index]);
 418                         cfg->map_type[index] = MAPTYPE_NONE;
 419                         // Dirty hack, I am sleepy and lazy.
 420                         add_mapping(cfg, MAPTYPE_ROM, cfg->map_offset[index], cfg->map_size[index], 0, tmp_string, "kickstart");
 421                         pi_cmd_result = PI_RES_OK;
 422                         do_reset = 1;
 423                     } else {
 424                         printf ("[PISTORM-DEV] Could not find mapped range 'kickstart', cannot remap KICKROM.\n");
 425                         pi_cmd_result = PI_RES_FAILED;
 426                     }
 427                 }
 428             }
 429             adjust_ranges_amiga(cfg);
 430             pi_string[0] = 0;
 431             break;
 432         case PI_CMD_EXTROM:
 433             DEBUG("[PISTORM-DEV] Write to EXTROM.\n");
 434             if (pi_string[0] == 0 || grab_amiga_string(pi_string[0], (uint8_t *)tmp_string, 255) == -1)  {
 435                 printf("[PISTORM-DEV] Failed to grab string EXTROM filename. Aborting.\n");
 436                 pi_cmd_result = PI_RES_FAILED;
 437             } else {
 438                 FILE *tmp = fopen(tmp_string, "rb");
 439                 if (tmp == NULL) {
 440                     printf("[PISTORM-DEV] Failed to open file %s for EXTROM mapping. Aborting.\n", tmp_string);
 441                     pi_cmd_result = PI_RES_FILENOTFOUND;
 442                 } else {
 443                     fclose(tmp);
 444                     if (get_named_mapped_item(cfg, "extended") != -1) {
 445                         uint32_t index = get_named_mapped_item(cfg, "extended");
 446                         free(cfg->map_data[index]);
 447                         free(cfg->map_id[index]);
 448                         cfg->map_type[index] = MAPTYPE_NONE;
 449                         // Dirty hack, I am tired and lazy.
 450                         add_mapping(cfg, MAPTYPE_ROM, cfg->map_offset[index], cfg->map_size[index], 0, tmp_string, "extended");
 451                         pi_cmd_result = PI_RES_OK;
 452                         do_reset = 1;
 453                     } else {
 454                         printf ("[PISTORM-DEV] Could not find mapped range 'extrom', cannot remap EXTROM.\n");
 455                         pi_cmd_result = PI_RES_FAILED;
 456                     }
 457                 }
 458             }
 459             adjust_ranges_amiga(cfg);
 460             pi_string[0] = 0;
 461             break;
 462
 463         case PI_CMD_RESET:
 464             DEBUG("[PISTORM-DEV] System reset called, code %d\n", (val & 0xFFFF));
 465             do_reset = 1;
 466             break;
 467         case PI_CMD_SHUTDOWN:
 468             DEBUG("[PISTORM-DEV] Shutdown requested. Confirm by replying with return value to CONFIRMSHUTDOWN.\n");
 469             shutdown_confirm = rand() % 0xFFFF;
 470             pi_cmd_result = shutdown_confirm;
 471             break;
 472         case PI_CMD_CONFIRMSHUTDOWN:
 473             if (val != shutdown_confirm) {
 474                 DEBUG("[PISTORM-DEV] Attempted shutdown with wrong shutdown confirm value. Not shutting down.\n");
 475                 shutdown_confirm = 0xFFFFFFFF;
 476                 pi_cmd_result = PI_RES_FAILED;
 477             } else {
 478                 printf("[PISTORM-DEV] Shutting down the PiStorm. Good night, fight well, until we meet again.\n");
 479                 reboot(LINUX_REBOOT_CMD_POWER_OFF);
 480                 pi_cmd_result = PI_RES_OK;
 481                 end_signal = 1;
 482             }
 483             break;
 484         case PI_CMD_SWITCHCONFIG:
 485             DEBUG("[PISTORM-DEV] Config switch called, command: ");
 486             switch (val) {
 487                 case PICFG_LOAD:
 488                     DEBUG("LOAD\n");
 489                     if (pi_string[0] == 0 || grab_amiga_string(pi_string[0], (uint8_t *)cfg_filename, 255) == -1) {
 490                         printf("[PISTORM-DEV] Failed to grab string for CONFIG filename. Aborting.\n");
 491                         pi_cmd_result = PI_RES_FAILED;
 492                     } else {
 493                         FILE *tmp = fopen(cfg_filename, "rb");
 494                         if (tmp == NULL) {
 495                             printf("[PISTORM-DEV] Failed to open CONFIG file %s for reading. Aborting.\n", cfg_filename);
 496                             pi_cmd_result = PI_RES_FILENOTFOUND;
 497                         } else {
 498                             fclose(tmp);
 499                             printf("[PISTORM-DEV] Attempting to load config file %s...\n", cfg_filename);
 500                             load_new_config = val + 1;
 501                             pi_cmd_result = PI_RES_OK;
 502                         }
 503                     }
 504                     pi_string[0] = 0;
 505                     break;
 506                 case PICFG_RELOAD:
 507                     DEBUG("RELOAD\n");
 508                     printf("[PISTORM-DEV] Reloading current config file (%s)...\n", cfg_filename);
 509                     load_new_config = val + 1;
 510                     break;
 511                 case PICFG_DEFAULT:
 512                     DEBUG("DEFAULT\n");
 513                     printf("[PISTORM-DEV] Loading default.cfg...\n");
 514                     load_new_config = val + 1;
 515                     break;
 516                 default:
 517                     DEBUG("UNKNOWN/UNHANDLED. Command ignored.\n");
 518                     pi_cmd_result = PI_RES_INVALIDVALUE;
 519                     break;
 520             }
 521             break;
 522         default:
 523             DEBUG("[PISTORM-DEV] WARN: Unhandled %s register write to %.4X: %d\n", op_type_names[type], addr - pistorm_dev_base, val);
 524             pi_cmd_result = PI_RES_INVALIDCMD;
 525             break;
 526     }
 527 }
 528
 529 uint32_t handle_pistorm_dev_read(uint32_t addr_, uint8_t type) {
 530     uint32_t addr = (addr_ & 0xFFFF);
 531
 532     switch((addr)) {
 533         case PI_CMD_FILESIZE:
 534             DEBUG("[PISTORM-DEV] %s read from FILESIZE.\n", op_type_names[type]);
 535             if (pi_string[0] == 0 || grab_amiga_string(pi_string[0], (uint8_t *)tmp_string, 255) == -1)  {
 536                 DEBUG("[PISTORM-DEV] Failed to grab string for FILESIZE command. Aborting.\n");
 537                 pi_cmd_result = PI_RES_FAILED;
 538                 pi_longword[0] = 0;
 539                 return 0;
 540             } else {
 541                 FILE *tmp = fopen(tmp_string, "rb");
 542                 if (tmp == NULL) {
 543                     DEBUG("[PISTORM-DEV] Failed to open file %s for FILESIZE command. Aborting.\n", tmp_string);
 544                     pi_longword[0] = 0;
 545                     pi_cmd_result = PI_RES_FILENOTFOUND;
 546                 } else {
 547                     fseek(tmp, 0, SEEK_END);
 548                     pi_longword[0] = ftell(tmp);
 549                     DEBUG("[PISTORM-DEV] Returning file size for file %s: %d bytes.\n", tmp_string, pi_longword[0]);
 550                     fclose(tmp);
 551                     pi_cmd_result = PI_RES_OK;
 552                 }
 553             }
 554             pi_string[0] = 0;
 555             return pi_longword[0];
 556             break;
 557
 558         case PI_CMD_HWREV:
 559             // Probably replace this with some read from the CPLD to get a simple hardware revision.
 560             DEBUG("[PISTORM-DEV] %s Read from HWREV\n", op_type_names[type]);
 561             return 0x0101; // 1.1
 562             break;
 563         case PI_CMD_SWREV:
 564             DEBUG("[PISTORM-DEV] %s Read from SWREV\n", op_type_names[type]);
 565             return PIDEV_SWREV;
 566             break;
 567         case PI_CMD_RTGSTATUS:
 568             DEBUG("[PISTORM-DEV] %s Read from RTGSTATUS\n", op_type_names[type]);
 569             return (rtg_on << 1) | rtg_enabled;
 570             break;
 571         case PI_CMD_NETSTATUS:
 572             DEBUG("[PISTORM-DEV] %s Read from NETSTATUS\n", op_type_names[type]);
 573             return pinet_enabled;
 574             break;
 575         case PI_CMD_PISCSI_CTRL:
 576             DEBUG("[PISTORM-DEV] %s Read from PISCSI_CTRL\n", op_type_names[type]);
 577             return piscsi_enabled;
 578             break;
 579         case PI_CMD_GET_FB:
 580             //DEBUG("[PISTORM-DEV] %s read from GET_FB: %.8X\n", op_type_names[type], rtg_get_fb());
 581             return rtg_get_fb();
 582
 583         case PI_DBG_VAL1: case PI_DBG_VAL2: case PI_DBG_VAL3: case PI_DBG_VAL4:
 584         case PI_DBG_VAL5: case PI_DBG_VAL6: case PI_DBG_VAL7: case PI_DBG_VAL8:
 585             DEBUG("[PISTORM-DEV] Read DEBUG VALUE %d (%d / $%.8X)\n", (addr - PI_DBG_VAL1) / 4, pi_dbg_val[(addr - PI_DBG_VAL1) / 4], pi_dbg_val[(addr - PI_DBG_VAL1) / 4]);
 586             return pi_dbg_val[(addr - PI_DBG_VAL1) / 4];
 587             break;
 588
 589         case PI_BYTE1: case PI_BYTE2: case PI_BYTE3: case PI_BYTE4:
 590         case PI_BYTE5: case PI_BYTE6: case PI_BYTE7: case PI_BYTE8:
 591             DEBUG("[PISTORM-DEV] Read BYTE %d (%d / $%.2X)\n", addr - PI_BYTE1, pi_byte[addr - PI_BYTE1], pi_byte[addr - PI_BYTE1]);
 592             return pi_byte[addr - PI_BYTE1];
 593             break;
 594         case PI_WORD1: case PI_WORD2: case PI_WORD3: case PI_WORD4:
 595             DEBUG("[PISTORM-DEV] Read WORD %d (%d / $%.4X)\n", (addr - PI_WORD1) / 2, pi_word[(addr - PI_WORD1) / 2], pi_word[(addr - PI_WORD1) / 2]);
 596             return pi_word[(addr - PI_WORD1) / 2];
 597             break;
 598         case PI_WORD5: case PI_WORD6: case PI_WORD7: case PI_WORD8:
 599         case PI_WORD9: case PI_WORD10: case PI_WORD11: case PI_WORD12:
 600             DEBUG("[PISTORM-DEV] Read WORD %d (%d / $%.4X)\n", (addr - PI_WORD5) / 2, pi_word[(addr - PI_WORD5) / 2], pi_word[(addr - PI_WORD5) / 2]);
 601             return pi_word[(addr - PI_WORD5) / 2];
 602             break;
 603         case PI_LONGWORD1: case PI_LONGWORD2: case PI_LONGWORD3: case PI_LONGWORD4:
 604             DEBUG("[PISTORM-DEV] Read LONGWORD %d (%d / $%.8X)\n", (addr - PI_LONGWORD1) / 4, pi_longword[(addr - PI_LONGWORD1) / 4], pi_longword[(addr - PI_LONGWORD1) / 4]);
 605             return pi_longword[(addr - PI_LONGWORD1) / 4];
 606             break;
 607
 608         case PI_CMDRESULT:
 609             //DEBUG("[PISTORM-DEV] %s Read from CMDRESULT: %d\n", op_type_names[type], pi_cmd_result);
 610             return pi_cmd_result;
 611             break;
 612
 613         default:
 614             DEBUG("[PISTORM-DEV] WARN: Unhandled %s register read from %.4X\n", op_type_names[type], addr - pistorm_dev_base);
 615             break;
 616     }
 617     return 0;
 618 }