| 1 | /* |
|---|
| 2 | * |
|---|
| 3 | * This file contains the entry point for the application. |
|---|
| 4 | * The name of this entry point is compiler dependent. |
|---|
| 5 | * It jumps to the BSP which is responsible for performing |
|---|
| 6 | * all initialization. |
|---|
| 7 | * |
|---|
| 8 | * COPYRIGHT (c) 1989-1998. |
|---|
| 9 | * On-Line Applications Research Corporation (OAR). |
|---|
| 10 | * Copyright assigned to U.S. Government, 1994. |
|---|
| 11 | * |
|---|
| 12 | * The license and distribution terms for this file may in |
|---|
| 13 | * the file LICENSE in this distribution or at |
|---|
| 14 | * http://www.OARcorp.com/rtems/license.html. |
|---|
| 15 | * |
|---|
| 16 | * Based on the `gen68302' board support package, and covered by the |
|---|
| 17 | * original distribution terms. |
|---|
| 18 | * |
|---|
| 19 | * W. Eric Norum |
|---|
| 20 | * Saskatchewan Accelerator Laboratory |
|---|
| 21 | * University of Saskatchewan |
|---|
| 22 | * Saskatoon, Saskatchewan, CANADA |
|---|
| 23 | * eric@skatter.usask.ca |
|---|
| 24 | * |
|---|
| 25 | * $Id$ |
|---|
| 26 | */ |
|---|
| 27 | |
|---|
| 28 | #include "asm.h" |
|---|
| 29 | |
|---|
| 30 | BEGIN_CODE |
|---|
| 31 | /* |
|---|
| 32 | * Step 1: Decide on Reset Stack Pointer and Initial Program Counter |
|---|
| 33 | */ |
|---|
| 34 | Entry: |
|---|
| 35 | .long SYM(m360)+1024 | 0: Initial SSP |
|---|
| 36 | .long start | 1: Initial PC |
|---|
| 37 | .long SYM(_uhoh) | 2: Bus error |
|---|
| 38 | .long SYM(_uhoh) | 3: Address error |
|---|
| 39 | .long SYM(_uhoh) | 4: Illegal instruction |
|---|
| 40 | .long SYM(_uhoh) | 5: Zero division |
|---|
| 41 | .long SYM(_uhoh) | 6: CHK, CHK2 instruction |
|---|
| 42 | .long SYM(_uhoh) | 7: TRAPcc, TRAPV instructions |
|---|
| 43 | .long SYM(_uhoh) | 8: Privilege violation |
|---|
| 44 | .long SYM(_uhoh) | 9: Trace |
|---|
| 45 | .long SYM(_uhoh) | 10: Line 1010 emulator |
|---|
| 46 | .long SYM(_uhoh) | 11: Line 1111 emulator |
|---|
| 47 | .long SYM(_uhoh) | 12: Hardware breakpoint |
|---|
| 48 | .long SYM(_uhoh) | 13: Reserved for coprocessor violation |
|---|
| 49 | .long SYM(_uhoh) | 14: Format error |
|---|
| 50 | .long SYM(_uhoh) | 15: Uninitialized interrupt |
|---|
| 51 | .long SYM(_uhoh) | 16: Unassigned, reserved |
|---|
| 52 | .long SYM(_uhoh) | 17: |
|---|
| 53 | .long SYM(_uhoh) | 18: |
|---|
| 54 | .long SYM(_uhoh) | 19: |
|---|
| 55 | .long SYM(_uhoh) | 20: |
|---|
| 56 | .long SYM(_uhoh) | 21: |
|---|
| 57 | .long SYM(_uhoh) | 22: |
|---|
| 58 | .long SYM(_uhoh) | 23: |
|---|
| 59 | .long SYM(_spuriousInterrupt) | 24: Spurious interrupt |
|---|
| 60 | .long SYM(_uhoh) | 25: Level 1 interrupt autovector |
|---|
| 61 | .long SYM(_uhoh) | 26: Level 2 interrupt autovector |
|---|
| 62 | .long SYM(_uhoh) | 27: Level 3 interrupt autovector |
|---|
| 63 | .long SYM(_uhoh) | 28: Level 4 interrupt autovector |
|---|
| 64 | .long SYM(_uhoh) | 29: Level 5 interrupt autovector |
|---|
| 65 | .long SYM(_uhoh) | 30: Level 6 interrupt autovector |
|---|
| 66 | .long SYM(_uhoh) | 31: Level 7 interrupt autovector |
|---|
| 67 | .long SYM(_uhoh) | 32: Trap instruction (0-15) |
|---|
| 68 | .long SYM(_uhoh) | 33: |
|---|
| 69 | .long SYM(_uhoh) | 34: |
|---|
| 70 | .long SYM(_uhoh) | 35: |
|---|
| 71 | .long SYM(_uhoh) | 36: |
|---|
| 72 | .long SYM(_uhoh) | 37: |
|---|
| 73 | .long SYM(_uhoh) | 38: |
|---|
| 74 | .long SYM(_uhoh) | 39: |
|---|
| 75 | .long SYM(_uhoh) | 40: |
|---|
| 76 | .long SYM(_uhoh) | 41: |
|---|
| 77 | .long SYM(_uhoh) | 42: |
|---|
| 78 | .long SYM(_uhoh) | 43: |
|---|
| 79 | .long SYM(_uhoh) | 44: |
|---|
| 80 | .long SYM(_uhoh) | 45: |
|---|
| 81 | .long SYM(_uhoh) | 46: |
|---|
| 82 | .long SYM(_uhoh) | 47: |
|---|
| 83 | .long SYM(_uhoh) | 48: Reserved for coprocessor |
|---|
| 84 | .long SYM(_uhoh) | 49: |
|---|
| 85 | .long SYM(_uhoh) | 50: |
|---|
| 86 | .long SYM(_uhoh) | 51: |
|---|
| 87 | .long SYM(_uhoh) | 52: |
|---|
| 88 | .long SYM(_uhoh) | 53: |
|---|
| 89 | .long SYM(_uhoh) | 54: |
|---|
| 90 | .long SYM(_uhoh) | 55: |
|---|
| 91 | .long SYM(_uhoh) | 56: |
|---|
| 92 | .long SYM(_uhoh) | 57: |
|---|
| 93 | .long SYM(_uhoh) | 58: |
|---|
| 94 | .long SYM(_uhoh) | 59: Unassigned, reserved |
|---|
| 95 | .long SYM(_uhoh) | 60: |
|---|
| 96 | .long SYM(_uhoh) | 61: |
|---|
| 97 | .long SYM(_uhoh) | 62: |
|---|
| 98 | .long SYM(_uhoh) | 63: |
|---|
| 99 | .long SYM(_uhoh) | 64: User defined vectors (192) |
|---|
| 100 | .long SYM(_uhoh) | 65: |
|---|
| 101 | .long SYM(_uhoh) | 66: |
|---|
| 102 | .long SYM(_uhoh) | 67: |
|---|
| 103 | .long SYM(_uhoh) | 68: |
|---|
| 104 | .long SYM(_uhoh) | 69: |
|---|
| 105 | .long SYM(_uhoh) | 70: |
|---|
| 106 | .long SYM(_uhoh) | 71: |
|---|
| 107 | .long SYM(_uhoh) | 72: |
|---|
| 108 | .long SYM(_uhoh) | 73: |
|---|
| 109 | .long SYM(_uhoh) | 74: |
|---|
| 110 | .long SYM(_uhoh) | 75: |
|---|
| 111 | .long SYM(_uhoh) | 76: |
|---|
| 112 | .long SYM(_uhoh) | 77: |
|---|
| 113 | .long SYM(_uhoh) | 78: |
|---|
| 114 | .long SYM(_uhoh) | 79: |
|---|
| 115 | .long SYM(_uhoh) | 80: |
|---|
| 116 | .long SYM(_uhoh) | 81: |
|---|
| 117 | .long SYM(_uhoh) | 82: |
|---|
| 118 | .long SYM(_uhoh) | 83: |
|---|
| 119 | .long SYM(_uhoh) | 84: |
|---|
| 120 | .long SYM(_uhoh) | 85: |
|---|
| 121 | .long SYM(_uhoh) | 86: |
|---|
| 122 | .long SYM(_uhoh) | 87: |
|---|
| 123 | .long SYM(_uhoh) | 88: |
|---|
| 124 | .long SYM(_uhoh) | 89: |
|---|
| 125 | .long SYM(_uhoh) | 90: |
|---|
| 126 | .long SYM(_uhoh) | 91: |
|---|
| 127 | .long SYM(_uhoh) | 92: |
|---|
| 128 | .long SYM(_uhoh) | 93: |
|---|
| 129 | .long SYM(_uhoh) | 94: |
|---|
| 130 | .long SYM(_uhoh) | 95: |
|---|
| 131 | .long SYM(_uhoh) | 96: |
|---|
| 132 | .long SYM(_uhoh) | 97: |
|---|
| 133 | .long SYM(_uhoh) | 98: |
|---|
| 134 | .long SYM(_uhoh) | 99: |
|---|
| 135 | .long SYM(_uhoh) | 100: |
|---|
| 136 | .long SYM(_uhoh) | 101: |
|---|
| 137 | .long SYM(_uhoh) | 102: |
|---|
| 138 | .long SYM(_uhoh) | 103: |
|---|
| 139 | .long SYM(_uhoh) | 104: |
|---|
| 140 | .long SYM(_uhoh) | 105: |
|---|
| 141 | .long SYM(_uhoh) | 106: |
|---|
| 142 | .long SYM(_uhoh) | 107: |
|---|
| 143 | .long SYM(_uhoh) | 108: |
|---|
| 144 | .long SYM(_uhoh) | 109: |
|---|
| 145 | .long SYM(_uhoh) | 110: |
|---|
| 146 | .long SYM(_uhoh) | 111: |
|---|
| 147 | .long SYM(_uhoh) | 112: |
|---|
| 148 | .long SYM(_uhoh) | 113: |
|---|
| 149 | .long SYM(_uhoh) | 114: |
|---|
| 150 | .long SYM(_uhoh) | 115: |
|---|
| 151 | .long SYM(_uhoh) | 116: |
|---|
| 152 | .long SYM(_uhoh) | 117: |
|---|
| 153 | .long SYM(_uhoh) | 118: |
|---|
| 154 | .long SYM(_uhoh) | 119: |
|---|
| 155 | .long SYM(_uhoh) | 120: |
|---|
| 156 | .long SYM(_uhoh) | 121: |
|---|
| 157 | .long SYM(_uhoh) | 122: |
|---|
| 158 | .long SYM(_uhoh) | 123: |
|---|
| 159 | .long SYM(_uhoh) | 124: |
|---|
| 160 | .long SYM(_uhoh) | 125: |
|---|
| 161 | .long SYM(_uhoh) | 126: |
|---|
| 162 | .long SYM(_uhoh) | 127: |
|---|
| 163 | .long SYM(_uhoh) | 128: |
|---|
| 164 | .long SYM(_uhoh) | 129: |
|---|
| 165 | .long SYM(_uhoh) | 130: |
|---|
| 166 | .long SYM(_uhoh) | 131: |
|---|
| 167 | .long SYM(_uhoh) | 132: |
|---|
| 168 | .long SYM(_uhoh) | 133: |
|---|
| 169 | .long SYM(_uhoh) | 134: |
|---|
| 170 | .long SYM(_uhoh) | 135: |
|---|
| 171 | .long SYM(_uhoh) | 136: |
|---|
| 172 | .long SYM(_uhoh) | 137: |
|---|
| 173 | .long SYM(_uhoh) | 138: |
|---|
| 174 | .long SYM(_uhoh) | 139: |
|---|
| 175 | .long SYM(_uhoh) | 140: |
|---|
| 176 | .long SYM(_uhoh) | 141: |
|---|
| 177 | .long SYM(_uhoh) | 142: |
|---|
| 178 | .long SYM(_uhoh) | 143: |
|---|
| 179 | .long SYM(_uhoh) | 144: |
|---|
| 180 | .long SYM(_uhoh) | 145: |
|---|
| 181 | .long SYM(_uhoh) | 146: |
|---|
| 182 | .long SYM(_uhoh) | 147: |
|---|
| 183 | .long SYM(_uhoh) | 148: |
|---|
| 184 | .long SYM(_uhoh) | 149: |
|---|
| 185 | .long SYM(_uhoh) | 150: |
|---|
| 186 | .long SYM(_uhoh) | 151: |
|---|
| 187 | .long SYM(_uhoh) | 152: |
|---|
| 188 | .long SYM(_uhoh) | 153: |
|---|
| 189 | .long SYM(_uhoh) | 154: |
|---|
| 190 | .long SYM(_uhoh) | 155: |
|---|
| 191 | .long SYM(_uhoh) | 156: |
|---|
| 192 | .long SYM(_uhoh) | 157: |
|---|
| 193 | .long SYM(_uhoh) | 158: |
|---|
| 194 | .long SYM(_uhoh) | 159: |
|---|
| 195 | .long SYM(_uhoh) | 160: |
|---|
| 196 | .long SYM(_uhoh) | 161: |
|---|
| 197 | .long SYM(_uhoh) | 162: |
|---|
| 198 | .long SYM(_uhoh) | 163: |
|---|
| 199 | .long SYM(_uhoh) | 164: |
|---|
| 200 | .long SYM(_uhoh) | 165: |
|---|
| 201 | .long SYM(_uhoh) | 166: |
|---|
| 202 | .long SYM(_uhoh) | 167: |
|---|
| 203 | .long SYM(_uhoh) | 168: |
|---|
| 204 | .long SYM(_uhoh) | 169: |
|---|
| 205 | .long SYM(_uhoh) | 170: |
|---|
| 206 | .long SYM(_uhoh) | 171: |
|---|
| 207 | .long SYM(_uhoh) | 172: |
|---|
| 208 | .long SYM(_uhoh) | 173: |
|---|
| 209 | .long SYM(_uhoh) | 174: |
|---|
| 210 | .long SYM(_uhoh) | 175: |
|---|
| 211 | .long SYM(_uhoh) | 176: |
|---|
| 212 | .long SYM(_uhoh) | 177: |
|---|
| 213 | .long SYM(_uhoh) | 178: |
|---|
| 214 | .long SYM(_uhoh) | 179: |
|---|
| 215 | .long SYM(_uhoh) | 180: |
|---|
| 216 | .long SYM(_uhoh) | 181: |
|---|
| 217 | .long SYM(_uhoh) | 182: |
|---|
| 218 | .long SYM(_uhoh) | 183: |
|---|
| 219 | .long SYM(_uhoh) | 184: |
|---|
| 220 | .long SYM(_uhoh) | 185: |
|---|
| 221 | .long SYM(_uhoh) | 186: |
|---|
| 222 | .long SYM(_uhoh) | 187: |
|---|
| 223 | .long SYM(_uhoh) | 188: |
|---|
| 224 | .long SYM(_uhoh) | 189: |
|---|
| 225 | .long SYM(_uhoh) | 190: |
|---|
| 226 | .long SYM(_uhoh) | 191: |
|---|
| 227 | .long SYM(_uhoh) | 192: |
|---|
| 228 | .long SYM(_uhoh) | 193: |
|---|
| 229 | .long SYM(_uhoh) | 194: |
|---|
| 230 | .long SYM(_uhoh) | 195: |
|---|
| 231 | .long SYM(_uhoh) | 196: |
|---|
| 232 | .long SYM(_uhoh) | 197: |
|---|
| 233 | .long SYM(_uhoh) | 198: |
|---|
| 234 | .long SYM(_uhoh) | 199: |
|---|
| 235 | .long SYM(_uhoh) | 200: |
|---|
| 236 | .long SYM(_uhoh) | 201: |
|---|
| 237 | .long SYM(_uhoh) | 202: |
|---|
| 238 | .long SYM(_uhoh) | 203: |
|---|
| 239 | .long SYM(_uhoh) | 204: |
|---|
| 240 | .long SYM(_uhoh) | 205: |
|---|
| 241 | .long SYM(_uhoh) | 206: |
|---|
| 242 | .long SYM(_uhoh) | 207: |
|---|
| 243 | .long SYM(_uhoh) | 208: |
|---|
| 244 | .long SYM(_uhoh) | 209: |
|---|
| 245 | .long SYM(_uhoh) | 210: |
|---|
| 246 | .long SYM(_uhoh) | 211: |
|---|
| 247 | .long SYM(_uhoh) | 212: |
|---|
| 248 | .long SYM(_uhoh) | 213: |
|---|
| 249 | .long SYM(_uhoh) | 214: |
|---|
| 250 | .long SYM(_uhoh) | 215: |
|---|
| 251 | .long SYM(_uhoh) | 216: |
|---|
| 252 | .long SYM(_uhoh) | 217: |
|---|
| 253 | .long SYM(_uhoh) | 218: |
|---|
| 254 | .long SYM(_uhoh) | 219: |
|---|
| 255 | .long SYM(_uhoh) | 220: |
|---|
| 256 | .long SYM(_uhoh) | 221: |
|---|
| 257 | .long SYM(_uhoh) | 222: |
|---|
| 258 | .long SYM(_uhoh) | 223: |
|---|
| 259 | .long SYM(_uhoh) | 224: |
|---|
| 260 | .long SYM(_uhoh) | 225: |
|---|
| 261 | .long SYM(_uhoh) | 226: |
|---|
| 262 | .long SYM(_uhoh) | 227: |
|---|
| 263 | .long SYM(_uhoh) | 228: |
|---|
| 264 | .long SYM(_uhoh) | 229: |
|---|
| 265 | .long SYM(_uhoh) | 230: |
|---|
| 266 | .long SYM(_uhoh) | 231: |
|---|
| 267 | .long SYM(_uhoh) | 232: |
|---|
| 268 | .long SYM(_uhoh) | 233: |
|---|
| 269 | .long SYM(_uhoh) | 234: |
|---|
| 270 | .long SYM(_uhoh) | 235: |
|---|
| 271 | .long SYM(_uhoh) | 236: |
|---|
| 272 | .long SYM(_uhoh) | 237: |
|---|
| 273 | .long SYM(_uhoh) | 238: |
|---|
| 274 | .long SYM(_uhoh) | 239: |
|---|
| 275 | .long SYM(_uhoh) | 240: |
|---|
| 276 | .long SYM(_uhoh) | 241: |
|---|
| 277 | .long SYM(_uhoh) | 242: |
|---|
| 278 | .long SYM(_uhoh) | 243: |
|---|
| 279 | .long SYM(_uhoh) | 244: |
|---|
| 280 | .long SYM(_uhoh) | 245: |
|---|
| 281 | .long SYM(_uhoh) | 246: |
|---|
| 282 | .long SYM(_uhoh) | 247: |
|---|
| 283 | .long SYM(_uhoh) | 248: |
|---|
| 284 | .long SYM(_uhoh) | 249: |
|---|
| 285 | .long SYM(_uhoh) | 250: |
|---|
| 286 | .long SYM(_uhoh) | 251: |
|---|
| 287 | .long SYM(_uhoh) | 252: |
|---|
| 288 | .long SYM(_uhoh) | 253: |
|---|
| 289 | .long SYM(_uhoh) | 254: |
|---|
| 290 | .long SYM(_uhoh) | 255: |
|---|
| 291 | |
|---|
| 292 | /* |
|---|
| 293 | * Default trap handler |
|---|
| 294 | * With an oscilloscope you can see AS* stop |
|---|
| 295 | */ |
|---|
| 296 | PUBLIC (_uhoh) |
|---|
| 297 | SYM(_uhoh): nop | Leave spot for breakpoint |
|---|
| 298 | stop #0x2700 | Stop with interrupts disabled |
|---|
| 299 | bra.s SYM(_uhoh) | Stuck forever |
|---|
| 300 | |
|---|
| 301 | /* |
|---|
| 302 | * Log, but otherwise ignore, spurious interrupts |
|---|
| 303 | */ |
|---|
| 304 | PUBLIC (_spuriousInterrupt) |
|---|
| 305 | SYM(_spuriousInterrupt): |
|---|
| 306 | addql #1,SYM(_M68kSpuriousInterruptCount) |
|---|
| 307 | rte |
|---|
| 308 | |
|---|
| 309 | /* |
|---|
| 310 | * Place the low-order 3 octets of the board's ethernet address at |
|---|
| 311 | * a `well-known' fixed location relative to the beginning of ROM. |
|---|
| 312 | */ |
|---|
| 313 | .align 2 |
|---|
| 314 | .long ETHERNET_ADDRESS | Low-order 3 octets of ethernet address |
|---|
| 315 | |
|---|
| 316 | /* |
|---|
| 317 | * For some reason, the symbol start must not be global. |
|---|
| 318 | * |
|---|
| 319 | * .global start |
|---|
| 320 | */ |
|---|
| 321 | |
|---|
| 322 | /* |
|---|
| 323 | * Initial PC |
|---|
| 324 | */ |
|---|
| 325 | .globl start |
|---|
| 326 | start: |
|---|
| 327 | /* |
|---|
| 328 | * Step 2: Stay in Supervisor Mode |
|---|
| 329 | */ |
|---|
| 330 | #if ( M68K_HAS_SEPARATE_STACKS == 1 ) |
|---|
| 331 | oriw #0x3000,sr | Switch to Master Stack Pointer |
|---|
| 332 | lea SYM(m360)+1024-64,a7 | Load stack pointer with space |
|---|
| 333 | | for the Interrupt Stack |
|---|
| 334 | #endif |
|---|
| 335 | |
|---|
| 336 | /* |
|---|
| 337 | * Step 3: Write the VBR |
|---|
| 338 | */ |
|---|
| 339 | lea Entry,a0 | Get base of vector table |
|---|
| 340 | movec a0,vbr | Set up the VBR |
|---|
| 341 | |
|---|
| 342 | /* |
|---|
| 343 | * Step 4: Write the MBAR |
|---|
| 344 | */ |
|---|
| 345 | movec dfc,d1 | Save destination register |
|---|
| 346 | moveq #7,d0 | CPU-space funcction code |
|---|
| 347 | movec d0,dfc | Set destination function code register |
|---|
| 348 | movel #SYM(m360)+0x101,d0 | MBAR value (mask CPU space accesses) |
|---|
| 349 | movesl d0,0x3FF00 | Set MBAR |
|---|
| 350 | movec d1,dfc | Restore destination register |
|---|
| 351 | |
|---|
| 352 | /* |
|---|
| 353 | * Step 5: Verify a dual-port RAM location |
|---|
| 354 | */ |
|---|
| 355 | lea SYM(m360),a0 | Point a0 to first DPRAM location |
|---|
| 356 | moveb #0x33,d0 | Set the test value |
|---|
| 357 | moveb d0,a0@ | Set the memory location |
|---|
| 358 | cmpb a0@,d0 | Does it read back? |
|---|
| 359 | bne SYM(_uhoh) | If not, bad news! |
|---|
| 360 | notb d0 | Flip bits |
|---|
| 361 | moveb d0,a0@ | Set the memory location |
|---|
| 362 | cmpb a0@,d0 | Does it read back? |
|---|
| 363 | bne SYM(_uhoh) | If not, bad news! |
|---|
| 364 | |
|---|
| 365 | /* |
|---|
| 366 | * Remaining steps are handled by C code |
|---|
| 367 | */ |
|---|
| 368 | jmp SYM(_Init68360) | Start C code (which never returns) |
|---|
| 369 | |
|---|
| 370 | /* |
|---|
| 371 | * Copy DATA segment, clear BSS segment, set up real stack, |
|---|
| 372 | * initialize heap, start C program. |
|---|
| 373 | * Assume that DATA and BSS sizes are multiples of 4. |
|---|
| 374 | */ |
|---|
| 375 | PUBLIC (_CopyDataClearBSSAndStart) |
|---|
| 376 | SYM(_CopyDataClearBSSAndStart): |
|---|
| 377 | lea copy_start,a0 | Get start of DATA in RAM |
|---|
| 378 | lea SYM(etext),a2 | Get start of DATA in ROM |
|---|
| 379 | cmpl a0,a2 | Are they the same? |
|---|
| 380 | beq.s NOCOPY | Yes, no copy necessary |
|---|
| 381 | lea copy_end,a1 | Get end of DATA in RAM |
|---|
| 382 | bra.s COPYLOOPTEST | Branch into copy loop |
|---|
| 383 | COPYLOOP: |
|---|
| 384 | movel a2@+,a0@+ | Copy word from ROM to RAM |
|---|
| 385 | COPYLOOPTEST: |
|---|
| 386 | cmpl a1,a0 | Done? |
|---|
| 387 | bcs.s COPYLOOP | No, skip |
|---|
| 388 | NOCOPY: |
|---|
| 389 | |
|---|
| 390 | lea clear_start,a0 | Get start of BSS |
|---|
| 391 | lea clear_end,a1 | Get end of BSS |
|---|
| 392 | clrl d0 | Value to set |
|---|
| 393 | bra.s ZEROLOOPTEST | Branch into clear loop |
|---|
| 394 | ZEROLOOP: |
|---|
| 395 | movel d0,a0@+ | Clear a word |
|---|
| 396 | ZEROLOOPTEST: |
|---|
| 397 | cmpl a1,a0 | Done? |
|---|
| 398 | bcs.s ZEROLOOP | No, skip |
|---|
| 399 | |
|---|
| 400 | movel #stack_init,a7 | set master stack pointer |
|---|
| 401 | movel d0,a7@- | environp |
|---|
| 402 | movel d0,a7@- | argv |
|---|
| 403 | movel d0,a7@- | argc |
|---|
| 404 | jsr SYM(main) | Call C main |
|---|
| 405 | |
|---|
| 406 | PUBLIC (_mainDone) |
|---|
| 407 | SYM(_mainDone): |
|---|
| 408 | nop | Leave spot for breakpoint |
|---|
| 409 | movew #1,a7 | Force a double bus error |
|---|
| 410 | movel d0,a7@- | This should cause a RESET |
|---|
| 411 | stop #0x2700 | Stop with interrupts disabled |
|---|
| 412 | bra.s SYM(_mainDone) | Stuck forever |
|---|
| 413 | |
|---|
| 414 | .align 2 |
|---|
| 415 | PUBLIC (_HeapSize) |
|---|
| 416 | SYM (_HeapSize): |
|---|
| 417 | .long HeapSize |
|---|
| 418 | PUBLIC (_StackSize) |
|---|
| 419 | SYM (_StackSize): |
|---|
| 420 | .long StackSize |
|---|
| 421 | END_CODE |
|---|
| 422 | |
|---|
| 423 | BEGIN_DATA_DCL |
|---|
| 424 | .align 2 |
|---|
| 425 | PUBLIC (environ) |
|---|
| 426 | SYM (environ): |
|---|
| 427 | .long 0 |
|---|
| 428 | PUBLIC (_M68kSpuriousInterruptCount) |
|---|
| 429 | SYM (_M68kSpuriousInterruptCount): |
|---|
| 430 | .long 0 |
|---|
| 431 | END_DATA_DCL |
|---|
| 432 | |
|---|
| 433 | END |
|---|
| 434 | |
|---|
![[RTEMS Logo]](/images/logo.png){kind=logo}
