siop.ss revision 1.20
1 ; $NetBSD: siop.ss,v 1.20 2005/11/18 23:10:32 bouyer Exp $ 2 3 ; 4 ; Copyright (c) 2000 Manuel Bouyer. 5 ; 6 ; Redistribution and use in source and binary forms, with or without 7 ; modification, are permitted provided that the following conditions 8 ; are met: 9 ; 1. Redistributions of source code must retain the above copyright 10 ; notice, this list of conditions and the following disclaimer. 11 ; 2. Redistributions in binary form must reproduce the above copyright 12 ; notice, this list of conditions and the following disclaimer in the 13 ; documentation and/or other materials provided with the distribution. 14 ; 3. All advertising materials mentioning features or use of this software 15 ; must display the following acknowledgement: 16 ; This product includes software developed by Manuel Bouyer. 17 ; 4. The name of the author may not be used to endorse or promote products 18 ; derived from this software without specific prior written permission. 19 ; 20 ; THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 21 ; IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 22 ; OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 23 ; IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 24 ; INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 25 ; NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 26 ; DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 27 ; THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 28 ; (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 29 ; THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 31 ARCH 720 32 33 ; offsets in siop_common_xfer 34 ABSOLUTE t_id = 40; 35 ABSOLUTE t_msg_in = 48; 36 ABSOLUTE t_ext_msg_in = 56; 37 ABSOLUTE t_ext_msg_data = 64; 38 ABSOLUTE t_msg_out = 72; 39 ABSOLUTE t_cmd = 80; 40 ABSOLUTE t_status = 88; 41 ABSOLUTE t_data = 96; 42 43 ;; interrupt codes 44 ; interrupts that need a valid DSA 45 ABSOLUTE int_done = 0xff00; 46 ABSOLUTE int_msgin = 0xff01; 47 ABSOLUTE int_extmsgin = 0xff02; 48 ABSOLUTE int_extmsgdata = 0xff03; 49 ABSOLUTE int_disc = 0xff04; 50 ABSOLUTE int_saveoffset = 0xff05; 51 ; interrupts that don't have a valid DSA 52 ABSOLUTE int_reseltarg = 0xff80; 53 ABSOLUTE int_resellun = 0xff81; 54 ABSOLUTE int_reseltag = 0xff82; 55 ABSOLUTE int_resfail = 0xff83; 56 ABSOLUTE int_err = 0xffff; 57 58 ; flags for scratcha0 59 ABSOLUTE flag_sdp = 0x01 ; got save data pointer 60 ABSOLUTE flag_data = 0x02 ; we're in data phase 61 ABSOLUTE flag_data_mask = 0xfd ; ~flag_data 62 63 ; main script symbols 64 65 ENTRY waitphase; 66 ENTRY send_msgout; 67 ENTRY msgout; 68 ENTRY msgin; 69 ENTRY handle_msgin; 70 ENTRY msgin_ack; 71 ENTRY dataout; 72 ENTRY datain; 73 ENTRY cmdout; 74 ENTRY status; 75 ENTRY disconnect; 76 ENTRY reselect; 77 ENTRY reselected; 78 ENTRY selected; 79 ENTRY script_sched; 80 ENTRY script_sched_slot0; 81 ENTRY get_extmsgdata; 82 ENTRY resel_targ0; 83 ENTRY msgin_space; 84 ENTRY lunsw_return; 85 ENTRY led_on1; 86 ENTRY led_on2; 87 ENTRY led_off; 88 EXTERN abs_script_sched_slot0; 89 EXTERN abs_targ0; 90 EXTERN abs_msgin; 91 92 ; lun switch symbols 93 ENTRY lun_switch_entry; 94 ENTRY resel_lun0; 95 ENTRY restore_scntl3; 96 EXTERN abs_lunsw_return; 97 98 ; tag switch symbols 99 ENTRY tag_switch_entry; 100 ENTRY resel_tag0; 101 EXTERN abs_tag0; 102 103 ; command reselect script symbols 104 ENTRY rdsa0; 105 ENTRY rdsa1; 106 ENTRY rdsa2; 107 ENTRY rdsa3; 108 ENTRY ldsa_reload_dsa; 109 ENTRY ldsa_select; 110 ENTRY ldsa_data; 111 112 EXTERN ldsa_abs_reselected; 113 EXTERN ldsa_abs_reselect; 114 EXTERN ldsa_abs_selected; 115 EXTERN ldsa_abs_data; 116 EXTERN ldsa_abs_slot; 117 118 ; main script 119 120 PROC siop_script: 121 122 reselected: 123 ; starting a new session, init 'local variables' 124 MOVE 0 to SCRATCHA0 ; flags 125 MOVE 0 to SCRATCHA1 ; DSA offset (for S/G save data pointer) 126 MOVE SCRATCHA3 to SFBR ; pending message ? 127 JUMP REL(handle_msgin), IF not 0x20; 128 waitphase: 129 JUMP REL(msgout), WHEN MSG_OUT; 130 JUMP REL(msgin), WHEN MSG_IN; 131 JUMP REL(dataout), WHEN DATA_OUT; 132 JUMP REL(datain), WHEN DATA_IN; 133 JUMP REL(cmdout), WHEN CMD; 134 JUMP REL(status), WHEN STATUS; 135 INT int_err; 136 137 reselect_fail: 138 ; check that host asserted SIGP, this'll clear SIGP in ISTAT 139 MOVE CTEST2 & 0x40 TO SFBR; 140 INT int_resfail, IF 0x00; 141 ; a NOP by default; patched with MOVE GPREG & 0xfe to GPREG on compile-time 142 ; option "SIOP_SYMLED" 143 led_on1: 144 NOP; 145 script_sched: 146 ; Clear DSA and init status 147 MOVE 0xff to DSA0; 148 MOVE 0xff to DSA1; 149 MOVE 0xff to DSA2; 150 MOVE 0xff to DSA3; 151 MOVE 0 to SCRATCHA0 ; flags 152 MOVE 0 to SCRATCHA1 ; DSA offset (for S/G save data pointer) 153 ; the script scheduler: siop_start() we set the absolute jump addr, and then 154 ; changes the FALSE to TRUE. The select script will change it back to false 155 ; once the target is selected. 156 ; The RAM could hold 370 slot entry, we limit it to 40. Should be more than 157 ; enough. 158 script_sched_slot0: 159 JUMP abs_script_sched_slot0, IF FALSE; 160 JUMP abs_script_sched_slot0, IF FALSE; 161 JUMP abs_script_sched_slot0, IF FALSE; 162 JUMP abs_script_sched_slot0, IF FALSE; 163 JUMP abs_script_sched_slot0, IF FALSE; 164 JUMP abs_script_sched_slot0, IF FALSE; 165 JUMP abs_script_sched_slot0, IF FALSE; 166 JUMP abs_script_sched_slot0, IF FALSE; 167 JUMP abs_script_sched_slot0, IF FALSE; 168 JUMP abs_script_sched_slot0, IF FALSE; 169 JUMP abs_script_sched_slot0, IF FALSE; 170 JUMP abs_script_sched_slot0, IF FALSE; 171 JUMP abs_script_sched_slot0, IF FALSE; 172 JUMP abs_script_sched_slot0, IF FALSE; 173 JUMP abs_script_sched_slot0, IF FALSE; 174 JUMP abs_script_sched_slot0, IF FALSE; 175 JUMP abs_script_sched_slot0, IF FALSE; 176 JUMP abs_script_sched_slot0, IF FALSE; 177 JUMP abs_script_sched_slot0, IF FALSE; 178 JUMP abs_script_sched_slot0, IF FALSE; 179 JUMP abs_script_sched_slot0, IF FALSE; 180 JUMP abs_script_sched_slot0, IF FALSE; 181 JUMP abs_script_sched_slot0, IF FALSE; 182 JUMP abs_script_sched_slot0, IF FALSE; 183 JUMP abs_script_sched_slot0, IF FALSE; 184 JUMP abs_script_sched_slot0, IF FALSE; 185 JUMP abs_script_sched_slot0, IF FALSE; 186 JUMP abs_script_sched_slot0, IF FALSE; 187 JUMP abs_script_sched_slot0, IF FALSE; 188 JUMP abs_script_sched_slot0, IF FALSE; 189 JUMP abs_script_sched_slot0, IF FALSE; 190 JUMP abs_script_sched_slot0, IF FALSE; 191 JUMP abs_script_sched_slot0, IF FALSE; 192 JUMP abs_script_sched_slot0, IF FALSE; 193 JUMP abs_script_sched_slot0, IF FALSE; 194 JUMP abs_script_sched_slot0, IF FALSE; 195 JUMP abs_script_sched_slot0, IF FALSE; 196 JUMP abs_script_sched_slot0, IF FALSE; 197 JUMP abs_script_sched_slot0, IF FALSE; 198 JUMP abs_script_sched_slot0, IF FALSE; 199 ; Nothing to do, wait for reselect 200 reselect: 201 ; Clear DSA and init status 202 MOVE 0xff to DSA0; 203 MOVE 0xff to DSA1; 204 MOVE 0xff to DSA2; 205 MOVE 0xff to DSA3; 206 MOVE 0x00 to SCRATCHA2; no tag 207 MOVE 0x20 to SCRATCHA3; simple tag msg, ignored by reselected: 208 ; a NOP by default; patched with MOVE GPREG | 0x01 to GPREG on compile-time 209 ; option "SIOP_SYMLED" 210 led_off: 211 NOP; 212 WAIT RESELECT REL(reselect_fail) 213 ; a NOP by default; patched with MOVE GPREG & 0xfe to GPREG on compile-time 214 ; option "SIOP_SYMLED" 215 led_on2: 216 NOP; 217 MOVE SSID & 0x8f to SFBR 218 MOVE SFBR to SCRATCHA0 ; save reselect ID 219 ; find the right param for this target 220 resel_targ0: 221 JUMP abs_targ0, IF 0xff; 222 JUMP abs_targ0, IF 0xff; 223 JUMP abs_targ0, IF 0xff; 224 JUMP abs_targ0, IF 0xff; 225 JUMP abs_targ0, IF 0xff; 226 JUMP abs_targ0, IF 0xff; 227 JUMP abs_targ0, IF 0xff; 228 JUMP abs_targ0, IF 0xff; 229 JUMP abs_targ0, IF 0xff; 230 JUMP abs_targ0, IF 0xff; 231 JUMP abs_targ0, IF 0xff; 232 JUMP abs_targ0, IF 0xff; 233 JUMP abs_targ0, IF 0xff; 234 JUMP abs_targ0, IF 0xff; 235 JUMP abs_targ0, IF 0xff; 236 INT int_reseltarg; 237 lunsw_return: 238 MOVE 1, abs_msgin, WHEN MSG_IN; 239 MOVE SFBR & 0x07 to SCRATCHA1; save LUN 240 CLEAR ACK; 241 RETURN, WHEN NOT MSG_IN; If no more message, jump to lun sw 242 MOVE 1, abs_msgin, WHEN MSG_IN; 243 CLEAR ACK; 244 MOVE SFBR to SCRATCHA3; save message 245 RETURN, IF NOT 0x20; jump to lun sw if not simple tag msg 246 MOVE 1, abs_msgin, WHEN MSG_IN; get tag 247 CLEAR ACK; 248 MOVE SFBR to SCRATCHA2; save tag 249 RETURN; jump to lun sw 250 251 handle_sdp: 252 CLEAR ACK; 253 MOVE SCRATCHA0 | flag_sdp TO SCRATCHA0; 254 ; should get a disconnect message now 255 msgin: 256 CLEAR ATN 257 MOVE FROM t_msg_in, WHEN MSG_IN; 258 handle_msgin: 259 JUMP REL(handle_cmpl), IF 0x00 ; command complete message 260 JUMP REL(handle_sdp), IF 0x02 ; save data pointer message 261 JUMP REL(handle_extin), IF 0x01 ; extended message 262 INT int_msgin, IF not 0x04; 263 CALL REL(disconnect) ; disconnect message; 264 ; if we didn't get sdp, no need to interrupt 265 MOVE SCRATCHA0 & flag_sdp TO SFBR; 266 INT int_disc, IF not 0x00; 267 ; update offset if we did some data transfer 268 MOVE SCRATCHA1 TO SFBR; 269 JUMP REL(script_sched), if 0x00; 270 INT int_saveoffset; 271 272 msgin_ack: 273 selected: 274 CLEAR ACK; 275 JUMP REL(waitphase); 276 277 ; entry point for msgout after a msgin or status phase 278 send_msgout: 279 SET ATN; 280 CLEAR ACK; 281 msgout: 282 MOVE FROM t_msg_out, WHEN MSG_OUT; 283 CLEAR ATN; 284 JUMP REL(waitphase); 285 cmdout: 286 MOVE FROM t_cmd, WHEN CMD; 287 JUMP REL(waitphase); 288 status: 289 MOVE FROM t_status, WHEN STATUS; 290 JUMP REL(waitphase); 291 datain: 292 CALL REL(savedsa); 293 MOVE SCRATCHA0 | flag_data TO SCRATCHA0; 294 datain_loop: 295 MOVE FROM t_data, WHEN DATA_IN; 296 MOVE SCRATCHA1 + 1 TO SCRATCHA1 ; adjust offset 297 MOVE DSA0 + 8 to DSA0; 298 MOVE DSA1 + 0 to DSA1 WITH CARRY; 299 MOVE DSA2 + 0 to DSA2 WITH CARRY; 300 MOVE DSA3 + 0 to DSA3 WITH CARRY; 301 JUMP REL(datain_loop), WHEN DATA_IN; 302 CALL REL(restoredsa); 303 MOVE SCRATCHA0 & flag_data_mask TO SCRATCHA0; 304 JUMP REL(waitphase); 305 306 dataout: 307 CALL REL(savedsa); 308 MOVE SCRATCHA0 | flag_data TO SCRATCHA0; 309 dataout_loop: 310 MOVE FROM t_data, WHEN DATA_OUT; 311 MOVE SCRATCHA1 + 1 TO SCRATCHA1 ; adjust offset 312 MOVE DSA0 + 8 to DSA0; 313 MOVE DSA1 + 0 to DSA1 WITH CARRY; 314 MOVE DSA2 + 0 to DSA2 WITH CARRY; 315 MOVE DSA3 + 0 to DSA3 WITH CARRY; 316 JUMP REL(dataout_loop), WHEN DATA_OUT; 317 CALL REL(restoredsa); 318 MOVE SCRATCHA0 & flag_data_mask TO SCRATCHA0; 319 JUMP REL(waitphase); 320 321 savedsa: 322 MOVE DSA0 to SFBR; 323 MOVE SFBR to SCRATCHB0; 324 MOVE DSA1 to SFBR; 325 MOVE SFBR to SCRATCHB1; 326 MOVE DSA2 to SFBR; 327 MOVE SFBR to SCRATCHB2; 328 MOVE DSA3 to SFBR; 329 MOVE SFBR to SCRATCHB3; 330 RETURN; 331 332 restoredsa: 333 MOVE SCRATCHB0 TO SFBR; 334 MOVE SFBR TO DSA0; 335 MOVE SCRATCHB1 TO SFBR; 336 MOVE SFBR TO DSA1; 337 MOVE SCRATCHB2 TO SFBR; 338 MOVE SFBR TO DSA2; 339 MOVE SCRATCHB3 TO SFBR; 340 MOVE SFBR TO DSA3; 341 RETURN; 342 343 disconnect: 344 MOVE SCNTL2 & 0x7f TO SCNTL2; 345 CLEAR ATN; 346 CLEAR ACK; 347 WAIT DISCONNECT; 348 RETURN; 349 350 handle_cmpl: 351 CALL REL(disconnect); 352 INT int_done; 353 354 handle_extin: 355 CLEAR ACK; 356 MOVE FROM t_ext_msg_in, WHEN MSG_IN; 357 INT int_extmsgin; /* let host fill in t_ext_msg_data */ 358 get_extmsgdata: 359 CLEAR ACK; 360 MOVE FROM t_ext_msg_data, WHEN MSG_IN; 361 INT int_extmsgdata; 362 msgin_space: 363 NOP; space to store msgin when reselect 364 365 366 ;; per-target switch script for LUNs 367 ; hack: we first do a call to the target-specific code, so that a return 368 ; in the main switch will jump to the lun switch. 369 PROC lun_switch: 370 restore_scntl3: 371 MOVE 0xff TO SCNTL3; 372 MOVE 0xff TO SXFER; 373 JUMP abs_lunsw_return; 374 lun_switch_entry: 375 CALL REL(restore_scntl3); 376 MOVE SCRATCHA1 TO SFBR; 377 resel_lun0: 378 INT int_resellun; 379 380 ;; Per-device switch script for tag 381 PROC tag_switch: 382 tag_switch_entry: 383 MOVE SCRATCHA2 TO SFBR; restore tag 384 resel_tag0: 385 JUMP abs_tag0, IF 0x00; 386 JUMP abs_tag0, IF 0x01; 387 JUMP abs_tag0, IF 0x02; 388 JUMP abs_tag0, IF 0x03; 389 JUMP abs_tag0, IF 0x04; 390 JUMP abs_tag0, IF 0x05; 391 JUMP abs_tag0, IF 0x06; 392 JUMP abs_tag0, IF 0x07; 393 JUMP abs_tag0, IF 0x08; 394 JUMP abs_tag0, IF 0x09; 395 JUMP abs_tag0, IF 0x0a; 396 JUMP abs_tag0, IF 0x0b; 397 JUMP abs_tag0, IF 0x0c; 398 JUMP abs_tag0, IF 0x0d; 399 JUMP abs_tag0, IF 0x0e; 400 JUMP abs_tag0, IF 0x0f; 401 INT int_reseltag; 402 403 ;; per-command script: select, and called after a reselect to load DSA 404 405 PROC load_dsa: 406 ; Can't use MOVE MEMORY to load DSA, doesn't work I/O mapped 407 rdsa0: 408 MOVE 0xf0 to DSA0; 409 rdsa1: 410 MOVE 0xf1 to DSA1; 411 rdsa2: 412 MOVE 0xf2 to DSA2; 413 rdsa3: 414 MOVE 0xf3 to DSA3; 415 RETURN; 416 ldsa_reload_dsa: 417 CALL REL(rdsa0); 418 JUMP ldsa_abs_reselected; 419 ldsa_select: 420 CALL REL(rdsa0); 421 SELECT ATN FROM t_id, ldsa_abs_reselect; 422 MOVE MEMORY 4, ldsa_abs_data, ldsa_abs_slot; 423 JUMP ldsa_abs_selected; 424 ldsa_data: 425 NOP; contains data used by the MOVE MEMORY 426 427 PROC siop_led_on: 428 MOVE GPREG & 0xfe TO GPREG; 429 430 PROC siop_led_off: 431 MOVE GPREG | 0x01 TO GPREG; 432
Indexes created Wed Oct 01 13:09:50 GMT 2025