siop.ss revision 1.19
1 ; $NetBSD: siop.ss,v 1.19 2005/02/27 00:27:29 perry 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 ; interrupts that don't have a valid DSA 51 ABSOLUTE int_reseltarg = 0xff80; 52 ABSOLUTE int_resellun = 0xff81; 53 ABSOLUTE int_reseltag = 0xff82; 54 ABSOLUTE int_resfail = 0xff83; 55 ABSOLUTE int_err = 0xffff; 56 57 ; flags for scratcha0 58 ABSOLUTE flag_sdp = 0x01 ; got save data pointer 59 ABSOLUTE flag_data = 0x02 ; we're in data phase 60 ABSOLUTE flag_data_mask = 0xfd ; ~flag_data 61 62 ; main script symbols 63 64 ENTRY waitphase; 65 ENTRY send_msgout; 66 ENTRY msgout; 67 ENTRY msgin; 68 ENTRY handle_msgin; 69 ENTRY msgin_ack; 70 ENTRY dataout; 71 ENTRY datain; 72 ENTRY cmdout; 73 ENTRY status; 74 ENTRY disconnect; 75 ENTRY reselect; 76 ENTRY reselected; 77 ENTRY selected; 78 ENTRY script_sched; 79 ENTRY script_sched_slot0; 80 ENTRY get_extmsgdata; 81 ENTRY resel_targ0; 82 ENTRY msgin_space; 83 ENTRY lunsw_return; 84 ENTRY led_on1; 85 ENTRY led_on2; 86 ENTRY led_off; 87 EXTERN abs_script_sched_slot0; 88 EXTERN abs_targ0; 89 EXTERN abs_msgin; 90 91 ; lun switch symbols 92 ENTRY lun_switch_entry; 93 ENTRY resel_lun0; 94 ENTRY restore_scntl3; 95 EXTERN abs_lunsw_return; 96 97 ; tag switch symbols 98 ENTRY tag_switch_entry; 99 ENTRY resel_tag0; 100 EXTERN abs_tag0; 101 102 ; command reselect script symbols 103 ENTRY rdsa0; 104 ENTRY rdsa1; 105 ENTRY rdsa2; 106 ENTRY rdsa3; 107 ENTRY ldsa_reload_dsa; 108 ENTRY ldsa_select; 109 ENTRY ldsa_data; 110 111 EXTERN ldsa_abs_reselected; 112 EXTERN ldsa_abs_reselect; 113 EXTERN ldsa_abs_selected; 114 EXTERN ldsa_abs_data; 115 EXTERN ldsa_abs_slot; 116 117 ; main script 118 119 PROC siop_script: 120 121 reselected: 122 ; starting a new session, init 'local variables' 123 MOVE 0 to SCRATCHA0 ; flags 124 MOVE 0 to SCRATCHA1 ; DSA offset (for S/G save data pointer) 125 MOVE SCRATCHA3 to SFBR ; pending message ? 126 JUMP REL(handle_msgin), IF not 0x20; 127 waitphase: 128 JUMP REL(msgout), WHEN MSG_OUT; 129 JUMP REL(msgin), WHEN MSG_IN; 130 JUMP REL(dataout), WHEN DATA_OUT; 131 JUMP REL(datain), WHEN DATA_IN; 132 JUMP REL(cmdout), WHEN CMD; 133 JUMP REL(status), WHEN STATUS; 134 INT int_err; 135 136 reselect_fail: 137 ; check that host asserted SIGP, this'll clear SIGP in ISTAT 138 MOVE CTEST2 & 0x40 TO SFBR; 139 INT int_resfail, IF 0x00; 140 ; a NOP by default; patched with MOVE GPREG & 0xfe to GPREG on compile-time 141 ; option "SIOP_SYMLED" 142 led_on1: 143 NOP; 144 script_sched: 145 ; Clear DSA and init status 146 MOVE 0xff to DSA0; 147 MOVE 0xff to DSA1; 148 MOVE 0xff to DSA2; 149 MOVE 0xff to DSA3; 150 MOVE 0 to SCRATCHA0 ; flags 151 MOVE 0 to SCRATCHA1 ; DSA offset (for S/G save data pointer) 152 ; the script scheduler: siop_start() we set the absolute jump addr, and then 153 ; changes the FALSE to TRUE. The select script will change it back to false 154 ; once the target is selected. 155 ; The RAM could hold 370 slot entry, we limit it to 40. Should be more than 156 ; enough. 157 script_sched_slot0: 158 JUMP abs_script_sched_slot0, IF FALSE; 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 ; Nothing to do, wait for reselect 199 reselect: 200 ; Clear DSA and init status 201 MOVE 0xff to DSA0; 202 MOVE 0xff to DSA1; 203 MOVE 0xff to DSA2; 204 MOVE 0xff to DSA3; 205 MOVE 0x00 to SCRATCHA2; no tag 206 MOVE 0x20 to SCRATCHA3; simple tag msg, ignored by reselected: 207 ; a NOP by default; patched with MOVE GPREG | 0x01 to GPREG on compile-time 208 ; option "SIOP_SYMLED" 209 led_off: 210 NOP; 211 WAIT RESELECT REL(reselect_fail) 212 ; a NOP by default; patched with MOVE GPREG & 0xfe to GPREG on compile-time 213 ; option "SIOP_SYMLED" 214 led_on2: 215 NOP; 216 MOVE SSID & 0x8f to SFBR 217 MOVE SFBR to SCRATCHA0 ; save reselect ID 218 ; find the right param for this target 219 resel_targ0: 220 JUMP abs_targ0, IF 0xff; 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 INT int_reseltarg; 236 lunsw_return: 237 MOVE 1, abs_msgin, WHEN MSG_IN; 238 MOVE SFBR & 0x07 to SCRATCHA1; save LUN 239 CLEAR ACK; 240 RETURN, WHEN NOT MSG_IN; If no more message, jump to lun sw 241 MOVE 1, abs_msgin, WHEN MSG_IN; 242 CLEAR ACK; 243 MOVE SFBR to SCRATCHA3; save message 244 RETURN, IF NOT 0x20; jump to lun sw if not simple tag msg 245 MOVE 1, abs_msgin, WHEN MSG_IN; get tag 246 CLEAR ACK; 247 MOVE SFBR to SCRATCHA2; save tag 248 RETURN; jump to lun sw 249 250 handle_sdp: 251 CLEAR ACK; 252 MOVE SCRATCHA0 | flag_sdp TO SCRATCHA0; 253 ; should get a disconnect message now 254 msgin: 255 CLEAR ATN 256 MOVE FROM t_msg_in, WHEN MSG_IN; 257 handle_msgin: 258 JUMP REL(handle_cmpl), IF 0x00 ; command complete message 259 JUMP REL(handle_sdp), IF 0x02 ; save data pointer message 260 JUMP REL(handle_extin), IF 0x01 ; extended message 261 INT int_msgin, IF not 0x04; 262 CALL REL(disconnect) ; disconnect message; 263 ; if we didn't get sdp, no need to interrupt 264 MOVE SCRATCHA0 & flag_sdp TO SFBR; 265 JUMP REL(script_sched), if 0x00; 266 ; Ok, we need to save data pointers 267 INT int_disc; 268 msgin_ack: 269 selected: 270 CLEAR ACK; 271 JUMP REL(waitphase); 272 273 ; entry point for msgout after a msgin or status phase 274 send_msgout: 275 SET ATN; 276 CLEAR ACK; 277 msgout: 278 MOVE FROM t_msg_out, WHEN MSG_OUT; 279 CLEAR ATN; 280 JUMP REL(waitphase); 281 cmdout: 282 MOVE FROM t_cmd, WHEN CMD; 283 JUMP REL(waitphase); 284 status: 285 MOVE FROM t_status, WHEN STATUS; 286 JUMP REL(waitphase); 287 datain: 288 CALL REL(savedsa); 289 MOVE SCRATCHA0 | flag_data TO SCRATCHA0; 290 datain_loop: 291 MOVE FROM t_data, WHEN DATA_IN; 292 MOVE SCRATCHA1 + 1 TO SCRATCHA1 ; adjust offset 293 MOVE DSA0 + 8 to DSA0; 294 MOVE DSA1 + 0 to DSA1 WITH CARRY; 295 MOVE DSA2 + 0 to DSA2 WITH CARRY; 296 MOVE DSA3 + 0 to DSA3 WITH CARRY; 297 JUMP REL(datain_loop), WHEN DATA_IN; 298 CALL REL(restoredsa); 299 MOVE SCRATCHA0 & flag_data_mask TO SCRATCHA0; 300 JUMP REL(waitphase); 301 302 dataout: 303 CALL REL(savedsa); 304 MOVE SCRATCHA0 | flag_data TO SCRATCHA0; 305 dataout_loop: 306 MOVE FROM t_data, WHEN DATA_OUT; 307 MOVE SCRATCHA1 + 1 TO SCRATCHA1 ; adjust offset 308 MOVE DSA0 + 8 to DSA0; 309 MOVE DSA1 + 0 to DSA1 WITH CARRY; 310 MOVE DSA2 + 0 to DSA2 WITH CARRY; 311 MOVE DSA3 + 0 to DSA3 WITH CARRY; 312 JUMP REL(dataout_loop), WHEN DATA_OUT; 313 CALL REL(restoredsa); 314 MOVE SCRATCHA0 & flag_data_mask TO SCRATCHA0; 315 JUMP REL(waitphase); 316 317 savedsa: 318 MOVE DSA0 to SFBR; 319 MOVE SFBR to SCRATCHB0; 320 MOVE DSA1 to SFBR; 321 MOVE SFBR to SCRATCHB1; 322 MOVE DSA2 to SFBR; 323 MOVE SFBR to SCRATCHB2; 324 MOVE DSA3 to SFBR; 325 MOVE SFBR to SCRATCHB3; 326 RETURN; 327 328 restoredsa: 329 MOVE SCRATCHB0 TO SFBR; 330 MOVE SFBR TO DSA0; 331 MOVE SCRATCHB1 TO SFBR; 332 MOVE SFBR TO DSA1; 333 MOVE SCRATCHB2 TO SFBR; 334 MOVE SFBR TO DSA2; 335 MOVE SCRATCHB3 TO SFBR; 336 MOVE SFBR TO DSA3; 337 RETURN; 338 339 disconnect: 340 MOVE SCNTL2 & 0x7f TO SCNTL2; 341 CLEAR ATN; 342 CLEAR ACK; 343 WAIT DISCONNECT; 344 RETURN; 345 346 handle_cmpl: 347 CALL REL(disconnect); 348 INT int_done; 349 350 handle_extin: 351 CLEAR ACK; 352 MOVE FROM t_ext_msg_in, WHEN MSG_IN; 353 INT int_extmsgin; /* let host fill in t_ext_msg_data */ 354 get_extmsgdata: 355 CLEAR ACK; 356 MOVE FROM t_ext_msg_data, WHEN MSG_IN; 357 INT int_extmsgdata; 358 msgin_space: 359 NOP; space to store msgin when reselect 360 361 362 ;; per-target switch script for LUNs 363 ; hack: we first do a call to the target-specific code, so that a return 364 ; in the main switch will jump to the lun switch. 365 PROC lun_switch: 366 restore_scntl3: 367 MOVE 0xff TO SCNTL3; 368 MOVE 0xff TO SXFER; 369 JUMP abs_lunsw_return; 370 lun_switch_entry: 371 CALL REL(restore_scntl3); 372 MOVE SCRATCHA1 TO SFBR; 373 resel_lun0: 374 INT int_resellun; 375 376 ;; Per-device switch script for tag 377 PROC tag_switch: 378 tag_switch_entry: 379 MOVE SCRATCHA2 TO SFBR; restore tag 380 resel_tag0: 381 JUMP abs_tag0, IF 0x00; 382 JUMP abs_tag0, IF 0x01; 383 JUMP abs_tag0, IF 0x02; 384 JUMP abs_tag0, IF 0x03; 385 JUMP abs_tag0, IF 0x04; 386 JUMP abs_tag0, IF 0x05; 387 JUMP abs_tag0, IF 0x06; 388 JUMP abs_tag0, IF 0x07; 389 JUMP abs_tag0, IF 0x08; 390 JUMP abs_tag0, IF 0x09; 391 JUMP abs_tag0, IF 0x0a; 392 JUMP abs_tag0, IF 0x0b; 393 JUMP abs_tag0, IF 0x0c; 394 JUMP abs_tag0, IF 0x0d; 395 JUMP abs_tag0, IF 0x0e; 396 JUMP abs_tag0, IF 0x0f; 397 INT int_reseltag; 398 399 ;; per-command script: select, and called after a reselect to load DSA 400 401 PROC load_dsa: 402 ; Can't use MOVE MEMORY to load DSA, doesn't work I/O mapped 403 rdsa0: 404 MOVE 0xf0 to DSA0; 405 rdsa1: 406 MOVE 0xf1 to DSA1; 407 rdsa2: 408 MOVE 0xf2 to DSA2; 409 rdsa3: 410 MOVE 0xf3 to DSA3; 411 RETURN; 412 ldsa_reload_dsa: 413 CALL REL(rdsa0); 414 JUMP ldsa_abs_reselected; 415 ldsa_select: 416 CALL REL(rdsa0); 417 SELECT ATN FROM t_id, ldsa_abs_reselect; 418 MOVE MEMORY 4, ldsa_abs_data, ldsa_abs_slot; 419 JUMP ldsa_abs_selected; 420 ldsa_data: 421 NOP; contains data used by the MOVE MEMORY 422 423 PROC siop_led_on: 424 MOVE GPREG & 0xfe TO GPREG; 425 426 PROC siop_led_off: 427 MOVE GPREG | 0x01 TO GPREG; 428
Indexes created Wed Oct 01 07:09:59 GMT 2025