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 static const char *op_type_names[4] = {
  25     "BYTE",
  26     "WORD",
  27     "LONGWORD",
  28     "MEM",
  29 };
  30 #else
  31 #define DEBUG(...)
  32 #endif
  33
  34 #define PIDEV_SWREV 0x0105
  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                     uint8_t *src_ptr = &cfg->map_data[src][(pi_ptr[0] - cfg->map_offset[src])];
 196                     uint8_t *dst_ptr = &cfg->map_data[dst][(pi_ptr[1] - cfg->map_offset[dst])];
 197                     memcpy(dst_ptr, src_ptr, val);
 198                 } else {
 199                     uint8_t tmp = 0;
 200                     uint16_t tmps = 0;
 201                     for (uint32_t i = 0; i < val; i++) {
 202                         while (i + 2 < val) {
 203                             if (src == -1) tmps = (uint16_t)m68k_read_memory_16(pi_ptr[0] + i);
 204                             else memcpy(&tmps, &cfg->map_data[src][pi_ptr[0] - cfg->map_offset[src] + i], 2);
 205
 206                             if (dst == -1) m68k_write_memory_16(pi_ptr[1] + i, tmps);
 207                             else memcpy(&cfg->map_data[dst][pi_ptr[1] - cfg->map_offset[dst] + i], &tmps, 2);
 208                             i += 2;
 209                         }
 210                         if (src == -1) tmp = (uint8_t)m68k_read_memory_8(pi_ptr[0] + i);
 211                         else tmp = cfg->map_data[src][pi_ptr[0] - cfg->map_offset[src] + i];
 212
 213                         if (dst == -1) m68k_write_memory_8(pi_ptr[1] + i, tmp);
 214                         else cfg->map_data[dst][pi_ptr[1] - cfg->map_offset[dst] + i] = tmp;
 215                     }
 216                 }
 217                 //DEBUG("[PISTORM-DEV] Copied %d bytes from $%.8X to $%.8X\n", val, pi_ptr[0], pi_ptr[1]);
 218             }
 219             break;
 220         case PI_CMD_MEMSET:
 221             //DEBUG("[PISTORM-DEV} Write to MEMSET: %d (%.8X)\n", val, val);
 222             if (pi_ptr[0] == 0) {
 223                 printf("[PISTORM-DEV] MEMSET with null pointer not allowed. Aborting.\n");
 224                 pi_cmd_result = PI_RES_INVALIDVALUE;
 225             } else if (val == 0) {
 226                 printf("[PISTORM-DEV] MEMSET called with size 0. Aborting.\n");
 227                 pi_cmd_result = PI_RES_INVALIDVALUE;
 228             } else {
 229                 int32_t dst = get_mapped_item_by_address(cfg, pi_ptr[0]);
 230                 if (dst != -1) {
 231                     uint8_t *dst_ptr = &cfg->map_data[dst][(pi_ptr[0] - cfg->map_offset[dst])];
 232                     memset(dst_ptr, pi_byte[0], val);
 233                 } else {
 234                     for (uint32_t i = 0; i < val; i++) {
 235                         m68k_write_memory_8(pi_ptr[0] + i, pi_byte[0]);
 236                     }
 237                 }
 238             }
 239             break;
 240         case PI_CMD_COPYRECT:
 241         case PI_CMD_COPYRECT_EX:
 242             if (pi_ptr[0] == 0 || pi_ptr[1] == 0) {
 243                 printf("[PISTORM-DEV] COPYRECT/EX from/to null pointer not allowed. Aborting.\n");
 244                 pi_cmd_result = PI_RES_INVALIDVALUE;
 245             } else if (pi_word[2] == 0 || pi_word[3] == 0) {
 246                 printf("[PISTORM-DEV] COPYRECT/EX called with a width/height of 0. Aborting.\n");
 247                 pi_cmd_result = PI_RES_INVALIDVALUE;
 248             } else {
 249                 int32_t src = get_mapped_item_by_address(cfg, pi_ptr[0]);
 250                 int32_t dst = get_mapped_item_by_address(cfg, pi_ptr[1]);
 251
 252                 if (addr != PI_CMD_COPYRECT_EX) {
 253                     // Clear out the src/dst coordinates in case something else set them previously.
 254                     pi_word[4] = pi_word[5] = pi_word[6] = pi_word[7] = 0;
 255                 }
 256
 257                 if (dst != -1 && src != -1) {
 258                     uint8_t *src_ptr = &cfg->map_data[src][(pi_ptr[0] - cfg->map_offset[src])];
 259                     uint8_t *dst_ptr = &cfg->map_data[dst][(pi_ptr[1] - cfg->map_offset[dst])];
 260
 261                     if (addr == PI_CMD_COPYRECT_EX) {
 262                         // Adjust pointers in the case of available src/dst coordinates.
 263                         src_ptr += pi_word[4] + (pi_word[5] * pi_word[0]);
 264                         dst_ptr += pi_word[6] + (pi_word[7] * pi_word[1]);
 265                     }
 266
 267                     for (int i = 0; i < pi_word[3]; i++) {
 268                         memcpy(dst_ptr, src_ptr, pi_word[2]);
 269
 270                         src_ptr += pi_word[0];
 271                         dst_ptr += pi_word[1];
 272                     }
 273                 } else {
 274                     uint32_t src_offset = 0, dst_offset = 0;
 275                     uint8_t tmp = 0;
 276
 277                     if (addr == PI_CMD_COPYRECT_EX) {
 278                         src_offset += pi_word[4] + (pi_word[5] * pi_word[0]);
 279                         dst_offset += pi_word[6] + (pi_word[7] * pi_word[1]);
 280                     }
 281
 282                     for (uint32_t y = 0; y < pi_word[3]; y++) {
 283                         for (uint32_t x = 0; x < pi_word[2]; x++) {
 284                             if (src == -1) tmp = (unsigned char)m68k_read_memory_8(pi_ptr[0] + src_offset + x);
 285                             else tmp = cfg->map_data[src][(pi_ptr[0] + src_offset + x) - cfg->map_offset[src]];
 286
 287                             if (dst == -1) m68k_write_memory_8(pi_ptr[1] + dst_offset + x, tmp);
 288                             else cfg->map_data[dst][(pi_ptr[1] + dst_offset + x) - cfg->map_offset[dst]] = tmp;
 289                         }
 290                         src_offset += pi_word[0];
 291                         dst_offset += pi_word[1];
 292                     }
 293                 }
 294             }
 295             break;
 296
 297         case PI_CMD_SHOWFPS: rtg_show_fps((uint8_t)val); break;
 298         case PI_CMD_PALETTEDEBUG: rtg_palette_debug((uint8_t)val); break;
 299         case PI_CMD_RTGSTATUS:
 300             DEBUG("[PISTORM-DEV] Write to RTGSTATUS: %d\n", val);
 301             if (val == 1 && !rtg_enabled) {
 302                 init_rtg_data(cfg);
 303                 rtg_enabled = 1;
 304                 pi_cmd_result = PI_RES_OK;
 305             } else if (val == 0 && rtg_enabled) {
 306                 if (!rtg_on) {
 307                     shutdown_rtg();
 308                     rtg_enabled = 0;
 309                     pi_cmd_result = PI_RES_OK;
 310                 } else {
 311                     // Refuse to disable RTG if it's currently in use.
 312                     pi_cmd_result = PI_RES_FAILED;
 313                 }
 314             } else {
 315                 pi_cmd_result = PI_RES_NOCHANGE;
 316             }
 317             adjust_ranges_amiga(cfg);
 318             break;
 319         case PI_CMD_NETSTATUS:
 320             DEBUG("[PISTORM-DEV] Write to NETSTATUS: %d\n", val);
 321             if (val == 1 && !pinet_enabled) {
 322                 pinet_init(NULL);
 323                 pinet_enabled = 1;
 324                 pi_cmd_result = PI_RES_OK;
 325             } else if (val == 0 && pinet_enabled) {
 326                 pinet_shutdown();
 327                 pinet_enabled = 0;
 328                 pi_cmd_result = PI_RES_OK;
 329             } else {
 330                 pi_cmd_result = PI_RES_NOCHANGE;
 331             }
 332             adjust_ranges_amiga(cfg);
 333             break;
 334         case PI_CMD_PISCSI_CTRL:
 335             DEBUG("[PISTORM-DEV] Write to PISCSI_CTRL: ");
 336             switch(val) {
 337                 case PISCSI_CTRL_DISABLE:
 338                     DEBUG("DISABLE\n");
 339                     if (piscsi_enabled) {
 340                         piscsi_shutdown();
 341                         piscsi_enabled = 0;
 342                         // Probably not OK... depends on if you booted from floppy, I guess.
 343                         pi_cmd_result = PI_RES_OK;
 344                     } else {
 345                         pi_cmd_result = PI_RES_NOCHANGE;
 346                     }
 347                     break;
 348                 case PISCSI_CTRL_ENABLE:
 349                     DEBUG("ENABLE\n");
 350                     if (!piscsi_enabled) {
 351                         piscsi_init();
 352                         piscsi_enabled = 1;
 353                         piscsi_refresh_drives();
 354                         pi_cmd_result = PI_RES_OK;
 355                     } else {
 356                         pi_cmd_result = PI_RES_NOCHANGE;
 357                     }
 358                     break;
 359                 case PISCSI_CTRL_MAP:
 360                     DEBUG("MAP\n");
 361                     if (pi_string[0] == 0 || grab_amiga_string(pi_string[0], (uint8_t *)tmp_string, 255) == -1)  {
 362                         printf("[PISTORM-DEV] Failed to grab string for PISCSI drive filename. Aborting.\n");
 363                         pi_cmd_result = PI_RES_FAILED;
 364                     } else {
 365                         FILE *tmp = fopen(tmp_string, "rb");
 366                         if (tmp == NULL) {
 367                             printf("[PISTORM-DEV] Failed to open file %s for PISCSI drive mapping. Aborting.\n", tmp_string);
 368                             pi_cmd_result = PI_RES_FILENOTFOUND;
 369                         } else {
 370                             fclose(tmp);
 371                             printf("[PISTORM-DEV] Attempting to map file %s as PISCSI drive %d...\n", tmp_string, pi_word[0]);
 372                             piscsi_unmap_drive(pi_word[0]);
 373                             piscsi_map_drive(tmp_string, pi_word[0]);
 374                             pi_cmd_result = PI_RES_OK;
 375                         }
 376                     }
 377                     pi_string[0] = 0;
 378                     break;
 379                 case PISCSI_CTRL_UNMAP:
 380                     DEBUG("UNMAP\n");
 381                     if (pi_word[0] > 7) {
 382                         printf("[PISTORM-DEV] Invalid drive ID %d for PISCSI unmap command.", pi_word[0]);
 383                         pi_cmd_result = PI_RES_INVALIDVALUE;
 384                     } else {
 385                         if (piscsi_get_dev(pi_word[0])->fd != -1) {
 386                             piscsi_unmap_drive(pi_word[0]);
 387                             pi_cmd_result = PI_RES_OK;
 388                         } else {
 389                             pi_cmd_result = PI_RES_NOCHANGE;
 390                         }
 391                     }
 392                     break;
 393                 case PISCSI_CTRL_EJECT:
 394                     DEBUG("EJECT (NYI)\n");
 395                     pi_cmd_result = PI_RES_NOCHANGE;
 396                     break;
 397                 case PISCSI_CTRL_INSERT:
 398                     DEBUG("INSERT (NYI)\n");
 399                     pi_cmd_result = PI_RES_NOCHANGE;
 400                     break;
 401                 default:
 402                     DEBUG("UNKNOWN/UNHANDLED. Aborting.\n");
 403                     pi_cmd_result = PI_RES_INVALIDVALUE;
 404                     break;
 405             }
 406             adjust_ranges_amiga(cfg);
 407             break;
 408
 409         case PI_CMD_KICKROM:
 410             DEBUG("[PISTORM-DEV] Write to KICKROM.\n");
 411             if (pi_string[0] == 0 || grab_amiga_string(pi_string[0], (uint8_t *)tmp_string, 255) == -1)  {
 412                 printf("[PISTORM-DEV] Failed to grab string KICKROM filename. Aborting.\n");
 413                 pi_cmd_result = PI_RES_FAILED;
 414             } else {
 415                 FILE *tmp = fopen(tmp_string, "rb");
 416                 if (tmp == NULL) {
 417                     printf("[PISTORM-DEV] Failed to open file %s for KICKROM mapping. Aborting.\n", tmp_string);
 418                     pi_cmd_result = PI_RES_FILENOTFOUND;
 419                 } else {
 420                     fclose(tmp);
 421                     if (get_named_mapped_item(cfg, "kickstart") != -1) {
 422                         uint32_t index = get_named_mapped_item(cfg, "kickstart");
 423                         free(cfg->map_data[index]);
 424                         free(cfg->map_id[index]);
 425                         cfg->map_type[index] = MAPTYPE_NONE;
 426                         // Dirty hack, I am sleepy and lazy.
 427                         add_mapping(cfg, MAPTYPE_ROM, cfg->map_offset[index], cfg->map_size[index], 0, tmp_string, "kickstart", 0);
 428                         pi_cmd_result = PI_RES_OK;
 429                         do_reset = 1;
 430                     } else {
 431                         printf ("[PISTORM-DEV] Could not find mapped range 'kickstart', cannot remap KICKROM.\n");
 432                         pi_cmd_result = PI_RES_FAILED;
 433                     }
 434                 }
 435             }
 436             adjust_ranges_amiga(cfg);
 437             pi_string[0] = 0;
 438             break;
 439         case PI_CMD_EXTROM:
 440             DEBUG("[PISTORM-DEV] Write to EXTROM.\n");
 441             if (pi_string[0] == 0 || grab_amiga_string(pi_string[0], (uint8_t *)tmp_string, 255) == -1)  {
 442                 printf("[PISTORM-DEV] Failed to grab string EXTROM filename. Aborting.\n");
 443                 pi_cmd_result = PI_RES_FAILED;
 444             } else {
 445                 FILE *tmp = fopen(tmp_string, "rb");
 446                 if (tmp == NULL) {
 447                     printf("[PISTORM-DEV] Failed to open file %s for EXTROM mapping. Aborting.\n", tmp_string);
 448                     pi_cmd_result = PI_RES_FILENOTFOUND;
 449                 } else {
 450                     fclose(tmp);
 451                     if (get_named_mapped_item(cfg, "extended") != -1) {
 452                         uint32_t index = get_named_mapped_item(cfg, "extended");
 453                         free(cfg->map_data[index]);
 454                         free(cfg->map_id[index]);
 455                         cfg->map_type[index] = MAPTYPE_NONE;
 456                         // Dirty hack, I am tired and lazy.
 457                         add_mapping(cfg, MAPTYPE_ROM, cfg->map_offset[index], cfg->map_size[index], 0, tmp_string, "extended", 0);
 458                         pi_cmd_result = PI_RES_OK;
 459                         do_reset = 1;
 460                     } else {
 461                         printf ("[PISTORM-DEV] Could not find mapped range 'extrom', cannot remap EXTROM.\n");
 462                         pi_cmd_result = PI_RES_FAILED;
 463                     }
 464                 }
 465             }
 466             adjust_ranges_amiga(cfg);
 467             pi_string[0] = 0;
 468             break;
 469
 470         case PI_CMD_RESET:
 471             DEBUG("[PISTORM-DEV] System reset called, code %d\n", (val & 0xFFFF));
 472             do_reset = 1;
 473             break;
 474         case PI_CMD_SHUTDOWN:
 475             DEBUG("[PISTORM-DEV] Shutdown requested. Confirm by replying with return value to CONFIRMSHUTDOWN.\n");
 476             shutdown_confirm = rand() % 0xFFFF;
 477             pi_cmd_result = shutdown_confirm;
 478             break;
 479         case PI_CMD_CONFIRMSHUTDOWN:
 480             if (val != shutdown_confirm) {
 481                 DEBUG("[PISTORM-DEV] Attempted shutdown with wrong shutdown confirm value. Not shutting down.\n");
 482                 shutdown_confirm = 0xFFFFFFFF;
 483                 pi_cmd_result = PI_RES_FAILED;
 484             } else {
 485                 printf("[PISTORM-DEV] Shutting down the PiStorm. Good night, fight well, until we meet again.\n");
 486                 reboot(LINUX_REBOOT_CMD_POWER_OFF);
 487                 pi_cmd_result = PI_RES_OK;
 488                 end_signal = 1;
 489             }
 490             break;
 491         case PI_CMD_SWITCHCONFIG:
 492             DEBUG("[PISTORM-DEV] Config switch called, command: ");
 493             switch (val) {
 494                 case PICFG_LOAD:
 495                     DEBUG("LOAD\n");
 496                     if (pi_string[0] == 0 || grab_amiga_string(pi_string[0], (uint8_t *)cfg_filename, 255) == -1) {
 497                         printf("[PISTORM-DEV] Failed to grab string for CONFIG filename. Aborting.\n");
 498                         pi_cmd_result = PI_RES_FAILED;
 499                     } else {
 500                         FILE *tmp = fopen(cfg_filename, "rb");
 501                         if (tmp == NULL) {
 502                             printf("[PISTORM-DEV] Failed to open CONFIG file %s for reading. Aborting.\n", cfg_filename);
 503                             pi_cmd_result = PI_RES_FILENOTFOUND;
 504                         } else {
 505                             fclose(tmp);
 506                             printf("[PISTORM-DEV] Attempting to load config file %s...\n", cfg_filename);
 507                             load_new_config = val + 1;
 508                             pi_cmd_result = PI_RES_OK;
 509                         }
 510                     }
 511                     pi_string[0] = 0;
 512                     break;
 513                 case PICFG_RELOAD:
 514                     DEBUG("RELOAD\n");
 515                     printf("[PISTORM-DEV] Reloading current config file (%s)...\n", cfg_filename);
 516                     load_new_config = val + 1;
 517                     break;
 518                 case PICFG_DEFAULT:
 519                     DEBUG("DEFAULT\n");
 520                     printf("[PISTORM-DEV] Loading default.cfg...\n");
 521                     load_new_config = val + 1;
 522                     break;
 523                 default:
 524                     DEBUG("UNKNOWN/UNHANDLED. Command ignored.\n");
 525                     pi_cmd_result = PI_RES_INVALIDVALUE;
 526                     break;
 527             }
 528             break;
 529         default:
 530             DEBUG("[PISTORM-DEV] WARN: Unhandled %s register write to %.4X: %d\n", op_type_names[type], addr - pistorm_dev_base, val);
 531             pi_cmd_result = PI_RES_INVALIDCMD;
 532             break;
 533     }
 534 }
 535
 536 uint32_t handle_pistorm_dev_read(uint32_t addr_, uint8_t type) {
 537     uint32_t addr = (addr_ & 0xFFFF);
 538
 539     switch((addr)) {
 540         case PI_CMD_FILESIZE:
 541             DEBUG("[PISTORM-DEV] %s read from FILESIZE.\n", op_type_names[type]);
 542             if (pi_string[0] == 0 || grab_amiga_string(pi_string[0], (uint8_t *)tmp_string, 255) == -1)  {
 543                 DEBUG("[PISTORM-DEV] Failed to grab string for FILESIZE command. Aborting.\n");
 544                 pi_cmd_result = PI_RES_FAILED;
 545                 pi_longword[0] = 0;
 546                 return 0;
 547             } else {
 548                 FILE *tmp = fopen(tmp_string, "rb");
 549                 if (tmp == NULL) {
 550                     DEBUG("[PISTORM-DEV] Failed to open file %s for FILESIZE command. Aborting.\n", tmp_string);
 551                     pi_longword[0] = 0;
 552                     pi_cmd_result = PI_RES_FILENOTFOUND;
 553                 } else {
 554                     fseek(tmp, 0, SEEK_END);
 555                     pi_longword[0] = ftell(tmp);
 556                     DEBUG("[PISTORM-DEV] Returning file size for file %s: %d bytes.\n", tmp_string, pi_longword[0]);
 557                     fclose(tmp);
 558                     pi_cmd_result = PI_RES_OK;
 559                 }
 560             }
 561             pi_string[0] = 0;
 562             return pi_longword[0];
 563             break;
 564
 565         case PI_CMD_HWREV:
 566             // Probably replace this with some read from the CPLD to get a simple hardware revision.
 567             DEBUG("[PISTORM-DEV] %s Read from HWREV\n", op_type_names[type]);
 568             return 0x0101; // 1.1
 569             break;
 570         case PI_CMD_SWREV:
 571             DEBUG("[PISTORM-DEV] %s Read from SWREV\n", op_type_names[type]);
 572             return PIDEV_SWREV;
 573             break;
 574         case PI_CMD_RTGSTATUS:
 575             DEBUG("[PISTORM-DEV] %s Read from RTGSTATUS\n", op_type_names[type]);
 576             return (rtg_on << 1) | rtg_enabled;
 577             break;
 578         case PI_CMD_NETSTATUS:
 579             DEBUG("[PISTORM-DEV] %s Read from NETSTATUS\n", op_type_names[type]);
 580             return pinet_enabled;
 581             break;
 582         case PI_CMD_PISCSI_CTRL:
 583             DEBUG("[PISTORM-DEV] %s Read from PISCSI_CTRL\n", op_type_names[type]);
 584             return piscsi_enabled;
 585             break;
 586         case PI_CMD_GET_FB:
 587             //DEBUG("[PISTORM-DEV] %s read from GET_FB: %.8X\n", op_type_names[type], rtg_get_fb());
 588             return rtg_get_fb();
 589
 590         case PI_DBG_VAL1: case PI_DBG_VAL2: case PI_DBG_VAL3: case PI_DBG_VAL4:
 591         case PI_DBG_VAL5: case PI_DBG_VAL6: case PI_DBG_VAL7: case PI_DBG_VAL8:
 592             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]);
 593             return pi_dbg_val[(addr - PI_DBG_VAL1) / 4];
 594             break;
 595
 596         case PI_BYTE1: case PI_BYTE2: case PI_BYTE3: case PI_BYTE4:
 597         case PI_BYTE5: case PI_BYTE6: case PI_BYTE7: case PI_BYTE8:
 598             DEBUG("[PISTORM-DEV] Read BYTE %d (%d / $%.2X)\n", addr - PI_BYTE1, pi_byte[addr - PI_BYTE1], pi_byte[addr - PI_BYTE1]);
 599             return pi_byte[addr - PI_BYTE1];
 600             break;
 601         case PI_WORD1: case PI_WORD2: case PI_WORD3: case PI_WORD4:
 602             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]);
 603             return pi_word[(addr - PI_WORD1) / 2];
 604             break;
 605         case PI_WORD5: case PI_WORD6: case PI_WORD7: case PI_WORD8:
 606         case PI_WORD9: case PI_WORD10: case PI_WORD11: case PI_WORD12:
 607             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]);
 608             return pi_word[(addr - PI_WORD5) / 2];
 609             break;
 610         case PI_LONGWORD1: case PI_LONGWORD2: case PI_LONGWORD3: case PI_LONGWORD4:
 611             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]);
 612             return pi_longword[(addr - PI_LONGWORD1) / 4];
 613             break;
 614
 615         case PI_CMDRESULT:
 616             //DEBUG("[PISTORM-DEV] %s Read from CMDRESULT: %d\n", op_type_names[type], pi_cmd_result);
 617             return pi_cmd_result;
 618             break;
 619
 620         default:
 621             DEBUG("[PISTORM-DEV] WARN: Unhandled %s register read from %.4X\n", op_type_names[type], addr - pistorm_dev_base);
 622             break;
 623     }
 624     return 0;
 625 }