1 /* 2 * ARM PrimeCell PL330 DMA Controller 3 * 4 * Copyright (c) 2009 Samsung Electronics. 5 * Contributed by Kirill Batuzov <batuzovk@ispras.ru> 6 * Copyright (c) 2012 Peter A.G. Crosthwaite (peter.crosthwaite@petalogix.com) 7 * Copyright (c) 2012 PetaLogix Pty Ltd. 8 * 9 * This program is free software; you can redistribute it and/or 10 * modify it under the terms of the GNU General Public License 11 * as published by the Free Software Foundation; version 2 or later. 12 * 13 * You should have received a copy of the GNU General Public License along 14 * with this program; if not, see <http://www.gnu.org/licenses/>. 15 */ 16 17 #include "qemu/osdep.h" 18 #include "hw/sysbus.h" 19 #include "qapi/error.h" 20 #include "qemu/timer.h" 21 #include "sysemu/dma.h" 22 #include "qemu/log.h" 23 24 #ifndef PL330_ERR_DEBUG 25 #define PL330_ERR_DEBUG 0 26 #endif 27 28 #define DB_PRINT_L(lvl, fmt, args...) do {\ 29 if (PL330_ERR_DEBUG >= lvl) {\ 30 fprintf(stderr, "PL330: %s:" fmt, __func__, ## args);\ 31 } \ 32 } while (0); 33 34 #define DB_PRINT(fmt, args...) DB_PRINT_L(1, fmt, ## args) 35 36 #define PL330_PERIPH_NUM 32 37 #define PL330_MAX_BURST_LEN 128 38 #define PL330_INSN_MAXSIZE 6 39 40 #define PL330_FIFO_OK 0 41 #define PL330_FIFO_STALL 1 42 #define PL330_FIFO_ERR (-1) 43 44 #define PL330_FAULT_UNDEF_INSTR (1 << 0) 45 #define PL330_FAULT_OPERAND_INVALID (1 << 1) 46 #define PL330_FAULT_DMAGO_ERR (1 << 4) 47 #define PL330_FAULT_EVENT_ERR (1 << 5) 48 #define PL330_FAULT_CH_PERIPH_ERR (1 << 6) 49 #define PL330_FAULT_CH_RDWR_ERR (1 << 7) 50 #define PL330_FAULT_ST_DATA_UNAVAILABLE (1 << 12) 51 #define PL330_FAULT_FIFOEMPTY_ERR (1 << 13) 52 #define PL330_FAULT_INSTR_FETCH_ERR (1 << 16) 53 #define PL330_FAULT_DATA_WRITE_ERR (1 << 17) 54 #define PL330_FAULT_DATA_READ_ERR (1 << 18) 55 #define PL330_FAULT_DBG_INSTR (1 << 30) 56 #define PL330_FAULT_LOCKUP_ERR (1 << 31) 57 58 #define PL330_UNTAGGED 0xff 59 60 #define PL330_SINGLE 0x0 61 #define PL330_BURST 0x1 62 63 #define PL330_WATCHDOG_LIMIT 1024 64 65 /* IOMEM mapped registers */ 66 #define PL330_REG_DSR 0x000 67 #define PL330_REG_DPC 0x004 68 #define PL330_REG_INTEN 0x020 69 #define PL330_REG_INT_EVENT_RIS 0x024 70 #define PL330_REG_INTMIS 0x028 71 #define PL330_REG_INTCLR 0x02C 72 #define PL330_REG_FSRD 0x030 73 #define PL330_REG_FSRC 0x034 74 #define PL330_REG_FTRD 0x038 75 #define PL330_REG_FTR_BASE 0x040 76 #define PL330_REG_CSR_BASE 0x100 77 #define PL330_REG_CPC_BASE 0x104 78 #define PL330_REG_CHANCTRL 0x400 79 #define PL330_REG_DBGSTATUS 0xD00 80 #define PL330_REG_DBGCMD 0xD04 81 #define PL330_REG_DBGINST0 0xD08 82 #define PL330_REG_DBGINST1 0xD0C 83 #define PL330_REG_CR0_BASE 0xE00 84 #define PL330_REG_PERIPH_ID 0xFE0 85 86 #define PL330_IOMEM_SIZE 0x1000 87 88 #define CFG_BOOT_ADDR 2 89 #define CFG_INS 3 90 #define CFG_PNS 4 91 #define CFG_CRD 5 92 93 static const uint32_t pl330_id[] = { 94 0x30, 0x13, 0x24, 0x00, 0x0D, 0xF0, 0x05, 0xB1 95 }; 96 97 /* DMA channel states as they are described in PL330 Technical Reference Manual 98 * Most of them will not be used in emulation. 99 */ 100 typedef enum { 101 pl330_chan_stopped = 0, 102 pl330_chan_executing = 1, 103 pl330_chan_cache_miss = 2, 104 pl330_chan_updating_pc = 3, 105 pl330_chan_waiting_event = 4, 106 pl330_chan_at_barrier = 5, 107 pl330_chan_queue_busy = 6, 108 pl330_chan_waiting_periph = 7, 109 pl330_chan_killing = 8, 110 pl330_chan_completing = 9, 111 pl330_chan_fault_completing = 14, 112 pl330_chan_fault = 15, 113 } PL330ChanState; 114 115 typedef struct PL330State PL330State; 116 117 typedef struct PL330Chan { 118 uint32_t src; 119 uint32_t dst; 120 uint32_t pc; 121 uint32_t control; 122 uint32_t status; 123 uint32_t lc[2]; 124 uint32_t fault_type; 125 uint32_t watchdog_timer; 126 127 bool ns; 128 uint8_t request_flag; 129 uint8_t wakeup; 130 uint8_t wfp_sbp; 131 132 uint8_t state; 133 uint8_t stall; 134 135 bool is_manager; 136 PL330State *parent; 137 uint8_t tag; 138 } PL330Chan; 139 140 static const VMStateDescription vmstate_pl330_chan = { 141 .name = "pl330_chan", 142 .version_id = 1, 143 .minimum_version_id = 1, 144 .fields = (VMStateField[]) { 145 VMSTATE_UINT32(src, PL330Chan), 146 VMSTATE_UINT32(dst, PL330Chan), 147 VMSTATE_UINT32(pc, PL330Chan), 148 VMSTATE_UINT32(control, PL330Chan), 149 VMSTATE_UINT32(status, PL330Chan), 150 VMSTATE_UINT32_ARRAY(lc, PL330Chan, 2), 151 VMSTATE_UINT32(fault_type, PL330Chan), 152 VMSTATE_UINT32(watchdog_timer, PL330Chan), 153 VMSTATE_BOOL(ns, PL330Chan), 154 VMSTATE_UINT8(request_flag, PL330Chan), 155 VMSTATE_UINT8(wakeup, PL330Chan), 156 VMSTATE_UINT8(wfp_sbp, PL330Chan), 157 VMSTATE_UINT8(state, PL330Chan), 158 VMSTATE_UINT8(stall, PL330Chan), 159 VMSTATE_END_OF_LIST() 160 } 161 }; 162 163 typedef struct PL330Fifo { 164 uint8_t *buf; 165 uint8_t *tag; 166 uint32_t head; 167 uint32_t num; 168 uint32_t buf_size; 169 } PL330Fifo; 170 171 static const VMStateDescription vmstate_pl330_fifo = { 172 .name = "pl330_chan", 173 .version_id = 1, 174 .minimum_version_id = 1, 175 .fields = (VMStateField[]) { 176 VMSTATE_VBUFFER_UINT32(buf, PL330Fifo, 1, NULL, buf_size), 177 VMSTATE_VBUFFER_UINT32(tag, PL330Fifo, 1, NULL, buf_size), 178 VMSTATE_UINT32(head, PL330Fifo), 179 VMSTATE_UINT32(num, PL330Fifo), 180 VMSTATE_UINT32(buf_size, PL330Fifo), 181 VMSTATE_END_OF_LIST() 182 } 183 }; 184 185 typedef struct PL330QueueEntry { 186 uint32_t addr; 187 uint32_t len; 188 uint8_t n; 189 bool inc; 190 bool z; 191 uint8_t tag; 192 uint8_t seqn; 193 } PL330QueueEntry; 194 195 static const VMStateDescription vmstate_pl330_queue_entry = { 196 .name = "pl330_queue_entry", 197 .version_id = 1, 198 .minimum_version_id = 1, 199 .fields = (VMStateField[]) { 200 VMSTATE_UINT32(addr, PL330QueueEntry), 201 VMSTATE_UINT32(len, PL330QueueEntry), 202 VMSTATE_UINT8(n, PL330QueueEntry), 203 VMSTATE_BOOL(inc, PL330QueueEntry), 204 VMSTATE_BOOL(z, PL330QueueEntry), 205 VMSTATE_UINT8(tag, PL330QueueEntry), 206 VMSTATE_UINT8(seqn, PL330QueueEntry), 207 VMSTATE_END_OF_LIST() 208 } 209 }; 210 211 typedef struct PL330Queue { 212 PL330State *parent; 213 PL330QueueEntry *queue; 214 uint32_t queue_size; 215 } PL330Queue; 216 217 static const VMStateDescription vmstate_pl330_queue = { 218 .name = "pl330_queue", 219 .version_id = 1, 220 .minimum_version_id = 1, 221 .fields = (VMStateField[]) { 222 VMSTATE_STRUCT_VARRAY_UINT32(queue, PL330Queue, queue_size, 1, 223 vmstate_pl330_queue_entry, PL330QueueEntry), 224 VMSTATE_END_OF_LIST() 225 } 226 }; 227 228 struct PL330State { 229 SysBusDevice parent_obj; 230 231 MemoryRegion iomem; 232 qemu_irq irq_abort; 233 qemu_irq *irq; 234 235 /* Config registers. cfg[5] = CfgDn. */ 236 uint32_t cfg[6]; 237 #define EVENT_SEC_STATE 3 238 #define PERIPH_SEC_STATE 4 239 /* cfg 0 bits and pieces */ 240 uint32_t num_chnls; 241 uint8_t num_periph_req; 242 uint8_t num_events; 243 uint8_t mgr_ns_at_rst; 244 /* cfg 1 bits and pieces */ 245 uint8_t i_cache_len; 246 uint8_t num_i_cache_lines; 247 /* CRD bits and pieces */ 248 uint8_t data_width; 249 uint8_t wr_cap; 250 uint8_t wr_q_dep; 251 uint8_t rd_cap; 252 uint8_t rd_q_dep; 253 uint16_t data_buffer_dep; 254 255 PL330Chan manager; 256 PL330Chan *chan; 257 PL330Fifo fifo; 258 PL330Queue read_queue; 259 PL330Queue write_queue; 260 uint8_t *lo_seqn; 261 uint8_t *hi_seqn; 262 QEMUTimer *timer; /* is used for restore dma. */ 263 264 uint32_t inten; 265 uint32_t int_status; 266 uint32_t ev_status; 267 uint32_t dbg[2]; 268 uint8_t debug_status; 269 uint8_t num_faulting; 270 uint8_t periph_busy[PL330_PERIPH_NUM]; 271 272 }; 273 274 #define TYPE_PL330 "pl330" 275 #define PL330(obj) OBJECT_CHECK(PL330State, (obj), TYPE_PL330) 276 277 static const VMStateDescription vmstate_pl330 = { 278 .name = "pl330", 279 .version_id = 1, 280 .minimum_version_id = 1, 281 .fields = (VMStateField[]) { 282 VMSTATE_STRUCT(manager, PL330State, 0, vmstate_pl330_chan, PL330Chan), 283 VMSTATE_STRUCT_VARRAY_UINT32(chan, PL330State, num_chnls, 0, 284 vmstate_pl330_chan, PL330Chan), 285 VMSTATE_VBUFFER_UINT32(lo_seqn, PL330State, 1, NULL, num_chnls), 286 VMSTATE_VBUFFER_UINT32(hi_seqn, PL330State, 1, NULL, num_chnls), 287 VMSTATE_STRUCT(fifo, PL330State, 0, vmstate_pl330_fifo, PL330Fifo), 288 VMSTATE_STRUCT(read_queue, PL330State, 0, vmstate_pl330_queue, 289 PL330Queue), 290 VMSTATE_STRUCT(write_queue, PL330State, 0, vmstate_pl330_queue, 291 PL330Queue), 292 VMSTATE_TIMER_PTR(timer, PL330State), 293 VMSTATE_UINT32(inten, PL330State), 294 VMSTATE_UINT32(int_status, PL330State), 295 VMSTATE_UINT32(ev_status, PL330State), 296 VMSTATE_UINT32_ARRAY(dbg, PL330State, 2), 297 VMSTATE_UINT8(debug_status, PL330State), 298 VMSTATE_UINT8(num_faulting, PL330State), 299 VMSTATE_UINT8_ARRAY(periph_busy, PL330State, PL330_PERIPH_NUM), 300 VMSTATE_END_OF_LIST() 301 } 302 }; 303 304 typedef struct PL330InsnDesc { 305 /* OPCODE of the instruction */ 306 uint8_t opcode; 307 /* Mask so we can select several sibling instructions, such as 308 DMALD, DMALDS and DMALDB */ 309 uint8_t opmask; 310 /* Size of instruction in bytes */ 311 uint8_t size; 312 /* Interpreter */ 313 void (*exec)(PL330Chan *, uint8_t opcode, uint8_t *args, int len); 314 } PL330InsnDesc; 315 316 317 /* MFIFO Implementation 318 * 319 * MFIFO is implemented as a cyclic buffer of BUF_SIZE size. Tagged bytes are 320 * stored in this buffer. Data is stored in BUF field, tags - in the 321 * corresponding array elements of TAG field. 322 */ 323 324 /* Initialize queue. */ 325 326 static void pl330_fifo_init(PL330Fifo *s, uint32_t size) 327 { 328 s->buf = g_malloc0(size); 329 s->tag = g_malloc0(size); 330 s->buf_size = size; 331 } 332 333 /* Cyclic increment */ 334 335 static inline int pl330_fifo_inc(PL330Fifo *s, int x) 336 { 337 return (x + 1) % s->buf_size; 338 } 339 340 /* Number of empty bytes in MFIFO */ 341 342 static inline int pl330_fifo_num_free(PL330Fifo *s) 343 { 344 return s->buf_size - s->num; 345 } 346 347 /* Push LEN bytes of data stored in BUF to MFIFO and tag it with TAG. 348 * Zero returned on success, PL330_FIFO_STALL if there is no enough free 349 * space in MFIFO to store requested amount of data. If push was unsuccessful 350 * no data is stored to MFIFO. 351 */ 352 353 static int pl330_fifo_push(PL330Fifo *s, uint8_t *buf, int len, uint8_t tag) 354 { 355 int i; 356 357 if (s->buf_size - s->num < len) { 358 return PL330_FIFO_STALL; 359 } 360 for (i = 0; i < len; i++) { 361 int push_idx = (s->head + s->num + i) % s->buf_size; 362 s->buf[push_idx] = buf[i]; 363 s->tag[push_idx] = tag; 364 } 365 s->num += len; 366 return PL330_FIFO_OK; 367 } 368 369 /* Get LEN bytes of data from MFIFO and store it to BUF. Tag value of each 370 * byte is verified. Zero returned on success, PL330_FIFO_ERR on tag mismatch 371 * and PL330_FIFO_STALL if there is no enough data in MFIFO. If get was 372 * unsuccessful no data is removed from MFIFO. 373 */ 374 375 static int pl330_fifo_get(PL330Fifo *s, uint8_t *buf, int len, uint8_t tag) 376 { 377 int i; 378 379 if (s->num < len) { 380 return PL330_FIFO_STALL; 381 } 382 for (i = 0; i < len; i++) { 383 if (s->tag[s->head] == tag) { 384 int get_idx = (s->head + i) % s->buf_size; 385 buf[i] = s->buf[get_idx]; 386 } else { /* Tag mismatch - Rollback transaction */ 387 return PL330_FIFO_ERR; 388 } 389 } 390 s->head = (s->head + len) % s->buf_size; 391 s->num -= len; 392 return PL330_FIFO_OK; 393 } 394 395 /* Reset MFIFO. This completely erases all data in it. */ 396 397 static inline void pl330_fifo_reset(PL330Fifo *s) 398 { 399 s->head = 0; 400 s->num = 0; 401 } 402 403 /* Return tag of the first byte stored in MFIFO. If MFIFO is empty 404 * PL330_UNTAGGED is returned. 405 */ 406 407 static inline uint8_t pl330_fifo_tag(PL330Fifo *s) 408 { 409 return (!s->num) ? PL330_UNTAGGED : s->tag[s->head]; 410 } 411 412 /* Returns non-zero if tag TAG is present in fifo or zero otherwise */ 413 414 static int pl330_fifo_has_tag(PL330Fifo *s, uint8_t tag) 415 { 416 int i, n; 417 418 i = s->head; 419 for (n = 0; n < s->num; n++) { 420 if (s->tag[i] == tag) { 421 return 1; 422 } 423 i = pl330_fifo_inc(s, i); 424 } 425 return 0; 426 } 427 428 /* Remove all entry tagged with TAG from MFIFO */ 429 430 static void pl330_fifo_tagged_remove(PL330Fifo *s, uint8_t tag) 431 { 432 int i, t, n; 433 434 t = i = s->head; 435 for (n = 0; n < s->num; n++) { 436 if (s->tag[i] != tag) { 437 s->buf[t] = s->buf[i]; 438 s->tag[t] = s->tag[i]; 439 t = pl330_fifo_inc(s, t); 440 } else { 441 s->num = s->num - 1; 442 } 443 i = pl330_fifo_inc(s, i); 444 } 445 } 446 447 /* Read-Write Queue implementation 448 * 449 * A Read-Write Queue stores up to QUEUE_SIZE instructions (loads or stores). 450 * Each instruction is described by source (for loads) or destination (for 451 * stores) address ADDR, width of data to be loaded/stored LEN, number of 452 * stores/loads to be performed N, INC bit, Z bit and TAG to identify channel 453 * this instruction belongs to. Queue does not store any information about 454 * nature of the instruction: is it load or store. PL330 has different queues 455 * for loads and stores so this is already known at the top level where it 456 * matters. 457 * 458 * Queue works as FIFO for instructions with equivalent tags, but can issue 459 * instructions with different tags in arbitrary order. SEQN field attached to 460 * each instruction helps to achieve this. For each TAG queue contains 461 * instructions with consecutive SEQN values ranging from LO_SEQN[TAG] to 462 * HI_SEQN[TAG]-1 inclusive. SEQN is 8-bit unsigned integer, so SEQN=255 is 463 * followed by SEQN=0. 464 * 465 * Z bit indicates that zeroes should be stored. No MFIFO fetches are performed 466 * in this case. 467 */ 468 469 static void pl330_queue_reset(PL330Queue *s) 470 { 471 int i; 472 473 for (i = 0; i < s->queue_size; i++) { 474 s->queue[i].tag = PL330_UNTAGGED; 475 } 476 } 477 478 /* Initialize queue */ 479 static void pl330_queue_init(PL330Queue *s, int size, PL330State *parent) 480 { 481 s->parent = parent; 482 s->queue = g_new0(PL330QueueEntry, size); 483 s->queue_size = size; 484 } 485 486 /* Returns pointer to an empty slot or NULL if queue is full */ 487 static PL330QueueEntry *pl330_queue_find_empty(PL330Queue *s) 488 { 489 int i; 490 491 for (i = 0; i < s->queue_size; i++) { 492 if (s->queue[i].tag == PL330_UNTAGGED) { 493 return &s->queue[i]; 494 } 495 } 496 return NULL; 497 } 498 499 /* Put instruction in queue. 500 * Return value: 501 * - zero - OK 502 * - non-zero - queue is full 503 */ 504 505 static int pl330_queue_put_insn(PL330Queue *s, uint32_t addr, 506 int len, int n, bool inc, bool z, uint8_t tag) 507 { 508 PL330QueueEntry *entry = pl330_queue_find_empty(s); 509 510 if (!entry) { 511 return 1; 512 } 513 entry->tag = tag; 514 entry->addr = addr; 515 entry->len = len; 516 entry->n = n; 517 entry->z = z; 518 entry->inc = inc; 519 entry->seqn = s->parent->hi_seqn[tag]; 520 s->parent->hi_seqn[tag]++; 521 return 0; 522 } 523 524 /* Returns a pointer to queue slot containing instruction which satisfies 525 * following conditions: 526 * - it has valid tag value (not PL330_UNTAGGED) 527 * - if enforce_seq is set it has to be issuable without violating queue 528 * logic (see above) 529 * - if TAG argument is not PL330_UNTAGGED this instruction has tag value 530 * equivalent to the argument TAG value. 531 * If such instruction cannot be found NULL is returned. 532 */ 533 534 static PL330QueueEntry *pl330_queue_find_insn(PL330Queue *s, uint8_t tag, 535 bool enforce_seq) 536 { 537 int i; 538 539 for (i = 0; i < s->queue_size; i++) { 540 if (s->queue[i].tag != PL330_UNTAGGED) { 541 if ((!enforce_seq || 542 s->queue[i].seqn == s->parent->lo_seqn[s->queue[i].tag]) && 543 (s->queue[i].tag == tag || tag == PL330_UNTAGGED || 544 s->queue[i].z)) { 545 return &s->queue[i]; 546 } 547 } 548 } 549 return NULL; 550 } 551 552 /* Removes instruction from queue. */ 553 554 static inline void pl330_queue_remove_insn(PL330Queue *s, PL330QueueEntry *e) 555 { 556 s->parent->lo_seqn[e->tag]++; 557 e->tag = PL330_UNTAGGED; 558 } 559 560 /* Removes all instructions tagged with TAG from queue. */ 561 562 static inline void pl330_queue_remove_tagged(PL330Queue *s, uint8_t tag) 563 { 564 int i; 565 566 for (i = 0; i < s->queue_size; i++) { 567 if (s->queue[i].tag == tag) { 568 s->queue[i].tag = PL330_UNTAGGED; 569 } 570 } 571 } 572 573 /* DMA instruction execution engine */ 574 575 /* Moves DMA channel to the FAULT state and updates it's status. */ 576 577 static inline void pl330_fault(PL330Chan *ch, uint32_t flags) 578 { 579 DB_PRINT("ch: %p, flags: %" PRIx32 "\n", ch, flags); 580 ch->fault_type |= flags; 581 if (ch->state == pl330_chan_fault) { 582 return; 583 } 584 ch->state = pl330_chan_fault; 585 ch->parent->num_faulting++; 586 if (ch->parent->num_faulting == 1) { 587 DB_PRINT("abort interrupt raised\n"); 588 qemu_irq_raise(ch->parent->irq_abort); 589 } 590 } 591 592 /* 593 * For information about instructions see PL330 Technical Reference Manual. 594 * 595 * Arguments: 596 * CH - channel executing the instruction 597 * OPCODE - opcode 598 * ARGS - array of 8-bit arguments 599 * LEN - number of elements in ARGS array 600 */ 601 602 static void pl330_dmaadxh(PL330Chan *ch, uint8_t *args, bool ra, bool neg) 603 { 604 uint32_t im = (args[1] << 8) | args[0]; 605 if (neg) { 606 im |= 0xffffu << 16; 607 } 608 609 if (ch->is_manager) { 610 pl330_fault(ch, PL330_FAULT_UNDEF_INSTR); 611 return; 612 } 613 if (ra) { 614 ch->dst += im; 615 } else { 616 ch->src += im; 617 } 618 } 619 620 static void pl330_dmaaddh(PL330Chan *ch, uint8_t opcode, uint8_t *args, int len) 621 { 622 pl330_dmaadxh(ch, args, extract32(opcode, 1, 1), false); 623 } 624 625 static void pl330_dmaadnh(PL330Chan *ch, uint8_t opcode, uint8_t *args, int len) 626 { 627 pl330_dmaadxh(ch, args, extract32(opcode, 1, 1), true); 628 } 629 630 static void pl330_dmaend(PL330Chan *ch, uint8_t opcode, 631 uint8_t *args, int len) 632 { 633 PL330State *s = ch->parent; 634 635 if (ch->state == pl330_chan_executing && !ch->is_manager) { 636 /* Wait for all transfers to complete */ 637 if (pl330_fifo_has_tag(&s->fifo, ch->tag) || 638 pl330_queue_find_insn(&s->read_queue, ch->tag, false) != NULL || 639 pl330_queue_find_insn(&s->write_queue, ch->tag, false) != NULL) { 640 641 ch->stall = 1; 642 return; 643 } 644 } 645 DB_PRINT("DMA ending!\n"); 646 pl330_fifo_tagged_remove(&s->fifo, ch->tag); 647 pl330_queue_remove_tagged(&s->read_queue, ch->tag); 648 pl330_queue_remove_tagged(&s->write_queue, ch->tag); 649 ch->state = pl330_chan_stopped; 650 } 651 652 static void pl330_dmaflushp(PL330Chan *ch, uint8_t opcode, 653 uint8_t *args, int len) 654 { 655 uint8_t periph_id; 656 657 if (args[0] & 7) { 658 pl330_fault(ch, PL330_FAULT_OPERAND_INVALID); 659 return; 660 } 661 periph_id = (args[0] >> 3) & 0x1f; 662 if (periph_id >= ch->parent->num_periph_req) { 663 pl330_fault(ch, PL330_FAULT_OPERAND_INVALID); 664 return; 665 } 666 if (ch->ns && !(ch->parent->cfg[CFG_PNS] & (1 << periph_id))) { 667 pl330_fault(ch, PL330_FAULT_CH_PERIPH_ERR); 668 return; 669 } 670 /* Do nothing */ 671 } 672 673 static void pl330_dmago(PL330Chan *ch, uint8_t opcode, uint8_t *args, int len) 674 { 675 uint8_t chan_id; 676 uint8_t ns; 677 uint32_t pc; 678 PL330Chan *s; 679 680 DB_PRINT("\n"); 681 682 if (!ch->is_manager) { 683 pl330_fault(ch, PL330_FAULT_UNDEF_INSTR); 684 return; 685 } 686 ns = !!(opcode & 2); 687 chan_id = args[0] & 7; 688 if ((args[0] >> 3)) { 689 pl330_fault(ch, PL330_FAULT_OPERAND_INVALID); 690 return; 691 } 692 if (chan_id >= ch->parent->num_chnls) { 693 pl330_fault(ch, PL330_FAULT_OPERAND_INVALID); 694 return; 695 } 696 pc = (((uint32_t)args[4]) << 24) | (((uint32_t)args[3]) << 16) | 697 (((uint32_t)args[2]) << 8) | (((uint32_t)args[1])); 698 if (ch->parent->chan[chan_id].state != pl330_chan_stopped) { 699 pl330_fault(ch, PL330_FAULT_OPERAND_INVALID); 700 return; 701 } 702 if (ch->ns && !ns) { 703 pl330_fault(ch, PL330_FAULT_DMAGO_ERR); 704 return; 705 } 706 s = &ch->parent->chan[chan_id]; 707 s->ns = ns; 708 s->pc = pc; 709 s->state = pl330_chan_executing; 710 } 711 712 static void pl330_dmald(PL330Chan *ch, uint8_t opcode, uint8_t *args, int len) 713 { 714 uint8_t bs = opcode & 3; 715 uint32_t size, num; 716 bool inc; 717 718 if (bs == 2) { 719 pl330_fault(ch, PL330_FAULT_OPERAND_INVALID); 720 return; 721 } 722 if ((bs == 1 && ch->request_flag == PL330_BURST) || 723 (bs == 3 && ch->request_flag == PL330_SINGLE)) { 724 /* Perform NOP */ 725 return; 726 } 727 if (bs == 1 && ch->request_flag == PL330_SINGLE) { 728 num = 1; 729 } else { 730 num = ((ch->control >> 4) & 0xf) + 1; 731 } 732 size = (uint32_t)1 << ((ch->control >> 1) & 0x7); 733 inc = !!(ch->control & 1); 734 ch->stall = pl330_queue_put_insn(&ch->parent->read_queue, ch->src, 735 size, num, inc, 0, ch->tag); 736 if (!ch->stall) { 737 DB_PRINT("channel:%" PRId8 " address:%08" PRIx32 " size:%" PRIx32 738 " num:%" PRId32 " %c\n", 739 ch->tag, ch->src, size, num, inc ? 'Y' : 'N'); 740 ch->src += inc ? size * num - (ch->src & (size - 1)) : 0; 741 } 742 } 743 744 static void pl330_dmaldp(PL330Chan *ch, uint8_t opcode, uint8_t *args, int len) 745 { 746 uint8_t periph_id; 747 748 if (args[0] & 7) { 749 pl330_fault(ch, PL330_FAULT_OPERAND_INVALID); 750 return; 751 } 752 periph_id = (args[0] >> 3) & 0x1f; 753 if (periph_id >= ch->parent->num_periph_req) { 754 pl330_fault(ch, PL330_FAULT_OPERAND_INVALID); 755 return; 756 } 757 if (ch->ns && !(ch->parent->cfg[CFG_PNS] & (1 << periph_id))) { 758 pl330_fault(ch, PL330_FAULT_CH_PERIPH_ERR); 759 return; 760 } 761 pl330_dmald(ch, opcode, args, len); 762 } 763 764 static void pl330_dmalp(PL330Chan *ch, uint8_t opcode, uint8_t *args, int len) 765 { 766 uint8_t lc = (opcode & 2) >> 1; 767 768 ch->lc[lc] = args[0]; 769 } 770 771 static void pl330_dmakill(PL330Chan *ch, uint8_t opcode, uint8_t *args, int len) 772 { 773 if (ch->state == pl330_chan_fault || 774 ch->state == pl330_chan_fault_completing) { 775 /* This is the only way for a channel to leave the faulting state */ 776 ch->fault_type = 0; 777 ch->parent->num_faulting--; 778 if (ch->parent->num_faulting == 0) { 779 DB_PRINT("abort interrupt lowered\n"); 780 qemu_irq_lower(ch->parent->irq_abort); 781 } 782 } 783 ch->state = pl330_chan_killing; 784 pl330_fifo_tagged_remove(&ch->parent->fifo, ch->tag); 785 pl330_queue_remove_tagged(&ch->parent->read_queue, ch->tag); 786 pl330_queue_remove_tagged(&ch->parent->write_queue, ch->tag); 787 ch->state = pl330_chan_stopped; 788 } 789 790 static void pl330_dmalpend(PL330Chan *ch, uint8_t opcode, 791 uint8_t *args, int len) 792 { 793 uint8_t nf = (opcode & 0x10) >> 4; 794 uint8_t bs = opcode & 3; 795 uint8_t lc = (opcode & 4) >> 2; 796 797 if (bs == 2) { 798 pl330_fault(ch, PL330_FAULT_OPERAND_INVALID); 799 return; 800 } 801 if ((bs == 1 && ch->request_flag == PL330_BURST) || 802 (bs == 3 && ch->request_flag == PL330_SINGLE)) { 803 /* Perform NOP */ 804 return; 805 } 806 if (!nf || ch->lc[lc]) { 807 if (nf) { 808 ch->lc[lc]--; 809 } 810 DB_PRINT("loop reiteration\n"); 811 ch->pc -= args[0]; 812 ch->pc -= len + 1; 813 /* "ch->pc -= args[0] + len + 1" is incorrect when args[0] == 256 */ 814 } else { 815 DB_PRINT("loop fallthrough\n"); 816 } 817 } 818 819 820 static void pl330_dmamov(PL330Chan *ch, uint8_t opcode, uint8_t *args, int len) 821 { 822 uint8_t rd = args[0] & 7; 823 uint32_t im; 824 825 if ((args[0] >> 3)) { 826 pl330_fault(ch, PL330_FAULT_OPERAND_INVALID); 827 return; 828 } 829 im = (((uint32_t)args[4]) << 24) | (((uint32_t)args[3]) << 16) | 830 (((uint32_t)args[2]) << 8) | (((uint32_t)args[1])); 831 switch (rd) { 832 case 0: 833 ch->src = im; 834 break; 835 case 1: 836 ch->control = im; 837 break; 838 case 2: 839 ch->dst = im; 840 break; 841 default: 842 pl330_fault(ch, PL330_FAULT_OPERAND_INVALID); 843 return; 844 } 845 } 846 847 static void pl330_dmanop(PL330Chan *ch, uint8_t opcode, 848 uint8_t *args, int len) 849 { 850 /* NOP is NOP. */ 851 } 852 853 static void pl330_dmarmb(PL330Chan *ch, uint8_t opcode, uint8_t *args, int len) 854 { 855 if (pl330_queue_find_insn(&ch->parent->read_queue, ch->tag, false)) { 856 ch->state = pl330_chan_at_barrier; 857 ch->stall = 1; 858 return; 859 } else { 860 ch->state = pl330_chan_executing; 861 } 862 } 863 864 static void pl330_dmasev(PL330Chan *ch, uint8_t opcode, uint8_t *args, int len) 865 { 866 uint8_t ev_id; 867 868 if (args[0] & 7) { 869 pl330_fault(ch, PL330_FAULT_OPERAND_INVALID); 870 return; 871 } 872 ev_id = (args[0] >> 3) & 0x1f; 873 if (ev_id >= ch->parent->num_events) { 874 pl330_fault(ch, PL330_FAULT_OPERAND_INVALID); 875 return; 876 } 877 if (ch->ns && !(ch->parent->cfg[CFG_INS] & (1 << ev_id))) { 878 pl330_fault(ch, PL330_FAULT_EVENT_ERR); 879 return; 880 } 881 if (ch->parent->inten & (1 << ev_id)) { 882 ch->parent->int_status |= (1 << ev_id); 883 DB_PRINT("event interrupt raised %" PRId8 "\n", ev_id); 884 qemu_irq_raise(ch->parent->irq[ev_id]); 885 } 886 DB_PRINT("event raised %" PRId8 "\n", ev_id); 887 ch->parent->ev_status |= (1 << ev_id); 888 } 889 890 static void pl330_dmast(PL330Chan *ch, uint8_t opcode, uint8_t *args, int len) 891 { 892 uint8_t bs = opcode & 3; 893 uint32_t size, num; 894 bool inc; 895 896 if (bs == 2) { 897 pl330_fault(ch, PL330_FAULT_OPERAND_INVALID); 898 return; 899 } 900 if ((bs == 1 && ch->request_flag == PL330_BURST) || 901 (bs == 3 && ch->request_flag == PL330_SINGLE)) { 902 /* Perform NOP */ 903 return; 904 } 905 num = ((ch->control >> 18) & 0xf) + 1; 906 size = (uint32_t)1 << ((ch->control >> 15) & 0x7); 907 inc = !!((ch->control >> 14) & 1); 908 ch->stall = pl330_queue_put_insn(&ch->parent->write_queue, ch->dst, 909 size, num, inc, 0, ch->tag); 910 if (!ch->stall) { 911 DB_PRINT("channel:%" PRId8 " address:%08" PRIx32 " size:%" PRIx32 912 " num:%" PRId32 " %c\n", 913 ch->tag, ch->dst, size, num, inc ? 'Y' : 'N'); 914 ch->dst += inc ? size * num - (ch->dst & (size - 1)) : 0; 915 } 916 } 917 918 static void pl330_dmastp(PL330Chan *ch, uint8_t opcode, 919 uint8_t *args, int len) 920 { 921 uint8_t periph_id; 922 923 if (args[0] & 7) { 924 pl330_fault(ch, PL330_FAULT_OPERAND_INVALID); 925 return; 926 } 927 periph_id = (args[0] >> 3) & 0x1f; 928 if (periph_id >= ch->parent->num_periph_req) { 929 pl330_fault(ch, PL330_FAULT_OPERAND_INVALID); 930 return; 931 } 932 if (ch->ns && !(ch->parent->cfg[CFG_PNS] & (1 << periph_id))) { 933 pl330_fault(ch, PL330_FAULT_CH_PERIPH_ERR); 934 return; 935 } 936 pl330_dmast(ch, opcode, args, len); 937 } 938 939 static void pl330_dmastz(PL330Chan *ch, uint8_t opcode, 940 uint8_t *args, int len) 941 { 942 uint32_t size, num; 943 bool inc; 944 945 num = ((ch->control >> 18) & 0xf) + 1; 946 size = (uint32_t)1 << ((ch->control >> 15) & 0x7); 947 inc = !!((ch->control >> 14) & 1); 948 ch->stall = pl330_queue_put_insn(&ch->parent->write_queue, ch->dst, 949 size, num, inc, 1, ch->tag); 950 if (inc) { 951 ch->dst += size * num; 952 } 953 } 954 955 static void pl330_dmawfe(PL330Chan *ch, uint8_t opcode, 956 uint8_t *args, int len) 957 { 958 uint8_t ev_id; 959 int i; 960 961 if (args[0] & 5) { 962 pl330_fault(ch, PL330_FAULT_OPERAND_INVALID); 963 return; 964 } 965 ev_id = (args[0] >> 3) & 0x1f; 966 if (ev_id >= ch->parent->num_events) { 967 pl330_fault(ch, PL330_FAULT_OPERAND_INVALID); 968 return; 969 } 970 if (ch->ns && !(ch->parent->cfg[CFG_INS] & (1 << ev_id))) { 971 pl330_fault(ch, PL330_FAULT_EVENT_ERR); 972 return; 973 } 974 ch->wakeup = ev_id; 975 ch->state = pl330_chan_waiting_event; 976 if (~ch->parent->inten & ch->parent->ev_status & 1 << ev_id) { 977 ch->state = pl330_chan_executing; 978 /* If anyone else is currently waiting on the same event, let them 979 * clear the ev_status so they pick up event as well 980 */ 981 for (i = 0; i < ch->parent->num_chnls; ++i) { 982 PL330Chan *peer = &ch->parent->chan[i]; 983 if (peer->state == pl330_chan_waiting_event && 984 peer->wakeup == ev_id) { 985 return; 986 } 987 } 988 ch->parent->ev_status &= ~(1 << ev_id); 989 DB_PRINT("event lowered %" PRIx8 "\n", ev_id); 990 } else { 991 ch->stall = 1; 992 } 993 } 994 995 static void pl330_dmawfp(PL330Chan *ch, uint8_t opcode, 996 uint8_t *args, int len) 997 { 998 uint8_t bs = opcode & 3; 999 uint8_t periph_id; 1000 1001 if (args[0] & 7) { 1002 pl330_fault(ch, PL330_FAULT_OPERAND_INVALID); 1003 return; 1004 } 1005 periph_id = (args[0] >> 3) & 0x1f; 1006 if (periph_id >= ch->parent->num_periph_req) { 1007 pl330_fault(ch, PL330_FAULT_OPERAND_INVALID); 1008 return; 1009 } 1010 if (ch->ns && !(ch->parent->cfg[CFG_PNS] & (1 << periph_id))) { 1011 pl330_fault(ch, PL330_FAULT_CH_PERIPH_ERR); 1012 return; 1013 } 1014 switch (bs) { 1015 case 0: /* S */ 1016 ch->request_flag = PL330_SINGLE; 1017 ch->wfp_sbp = 0; 1018 break; 1019 case 1: /* P */ 1020 ch->request_flag = PL330_BURST; 1021 ch->wfp_sbp = 2; 1022 break; 1023 case 2: /* B */ 1024 ch->request_flag = PL330_BURST; 1025 ch->wfp_sbp = 1; 1026 break; 1027 default: 1028 pl330_fault(ch, PL330_FAULT_OPERAND_INVALID); 1029 return; 1030 } 1031 1032 if (ch->parent->periph_busy[periph_id]) { 1033 ch->state = pl330_chan_waiting_periph; 1034 ch->stall = 1; 1035 } else if (ch->state == pl330_chan_waiting_periph) { 1036 ch->state = pl330_chan_executing; 1037 } 1038 } 1039 1040 static void pl330_dmawmb(PL330Chan *ch, uint8_t opcode, 1041 uint8_t *args, int len) 1042 { 1043 if (pl330_queue_find_insn(&ch->parent->write_queue, ch->tag, false)) { 1044 ch->state = pl330_chan_at_barrier; 1045 ch->stall = 1; 1046 return; 1047 } else { 1048 ch->state = pl330_chan_executing; 1049 } 1050 } 1051 1052 /* NULL terminated array of the instruction descriptions. */ 1053 static const PL330InsnDesc insn_desc[] = { 1054 { .opcode = 0x54, .opmask = 0xFD, .size = 3, .exec = pl330_dmaaddh, }, 1055 { .opcode = 0x5c, .opmask = 0xFD, .size = 3, .exec = pl330_dmaadnh, }, 1056 { .opcode = 0x00, .opmask = 0xFF, .size = 1, .exec = pl330_dmaend, }, 1057 { .opcode = 0x35, .opmask = 0xFF, .size = 2, .exec = pl330_dmaflushp, }, 1058 { .opcode = 0xA0, .opmask = 0xFD, .size = 6, .exec = pl330_dmago, }, 1059 { .opcode = 0x04, .opmask = 0xFC, .size = 1, .exec = pl330_dmald, }, 1060 { .opcode = 0x25, .opmask = 0xFD, .size = 2, .exec = pl330_dmaldp, }, 1061 { .opcode = 0x20, .opmask = 0xFD, .size = 2, .exec = pl330_dmalp, }, 1062 /* dmastp must be before dmalpend in this list, because their maps 1063 * are overlapping 1064 */ 1065 { .opcode = 0x29, .opmask = 0xFD, .size = 2, .exec = pl330_dmastp, }, 1066 { .opcode = 0x28, .opmask = 0xE8, .size = 2, .exec = pl330_dmalpend, }, 1067 { .opcode = 0x01, .opmask = 0xFF, .size = 1, .exec = pl330_dmakill, }, 1068 { .opcode = 0xBC, .opmask = 0xFF, .size = 6, .exec = pl330_dmamov, }, 1069 { .opcode = 0x18, .opmask = 0xFF, .size = 1, .exec = pl330_dmanop, }, 1070 { .opcode = 0x12, .opmask = 0xFF, .size = 1, .exec = pl330_dmarmb, }, 1071 { .opcode = 0x34, .opmask = 0xFF, .size = 2, .exec = pl330_dmasev, }, 1072 { .opcode = 0x08, .opmask = 0xFC, .size = 1, .exec = pl330_dmast, }, 1073 { .opcode = 0x0C, .opmask = 0xFF, .size = 1, .exec = pl330_dmastz, }, 1074 { .opcode = 0x36, .opmask = 0xFF, .size = 2, .exec = pl330_dmawfe, }, 1075 { .opcode = 0x30, .opmask = 0xFC, .size = 2, .exec = pl330_dmawfp, }, 1076 { .opcode = 0x13, .opmask = 0xFF, .size = 1, .exec = pl330_dmawmb, }, 1077 { .opcode = 0x00, .opmask = 0x00, .size = 0, .exec = NULL, } 1078 }; 1079 1080 /* Instructions which can be issued via debug registers. */ 1081 static const PL330InsnDesc debug_insn_desc[] = { 1082 { .opcode = 0xA0, .opmask = 0xFD, .size = 6, .exec = pl330_dmago, }, 1083 { .opcode = 0x01, .opmask = 0xFF, .size = 1, .exec = pl330_dmakill, }, 1084 { .opcode = 0x34, .opmask = 0xFF, .size = 2, .exec = pl330_dmasev, }, 1085 { .opcode = 0x00, .opmask = 0x00, .size = 0, .exec = NULL, } 1086 }; 1087 1088 static inline const PL330InsnDesc *pl330_fetch_insn(PL330Chan *ch) 1089 { 1090 uint8_t opcode; 1091 int i; 1092 1093 dma_memory_read(&address_space_memory, ch->pc, &opcode, 1); 1094 for (i = 0; insn_desc[i].size; i++) { 1095 if ((opcode & insn_desc[i].opmask) == insn_desc[i].opcode) { 1096 return &insn_desc[i]; 1097 } 1098 } 1099 return NULL; 1100 } 1101 1102 static inline void pl330_exec_insn(PL330Chan *ch, const PL330InsnDesc *insn) 1103 { 1104 uint8_t buf[PL330_INSN_MAXSIZE]; 1105 1106 assert(insn->size <= PL330_INSN_MAXSIZE); 1107 dma_memory_read(&address_space_memory, ch->pc, buf, insn->size); 1108 insn->exec(ch, buf[0], &buf[1], insn->size - 1); 1109 } 1110 1111 static inline void pl330_update_pc(PL330Chan *ch, 1112 const PL330InsnDesc *insn) 1113 { 1114 ch->pc += insn->size; 1115 } 1116 1117 /* Try to execute current instruction in channel CH. Number of executed 1118 instructions is returned (0 or 1). */ 1119 static int pl330_chan_exec(PL330Chan *ch) 1120 { 1121 const PL330InsnDesc *insn; 1122 1123 if (ch->state != pl330_chan_executing && 1124 ch->state != pl330_chan_waiting_periph && 1125 ch->state != pl330_chan_at_barrier && 1126 ch->state != pl330_chan_waiting_event) { 1127 return 0; 1128 } 1129 ch->stall = 0; 1130 insn = pl330_fetch_insn(ch); 1131 if (!insn) { 1132 DB_PRINT("pl330 undefined instruction\n"); 1133 pl330_fault(ch, PL330_FAULT_UNDEF_INSTR); 1134 return 0; 1135 } 1136 pl330_exec_insn(ch, insn); 1137 if (!ch->stall) { 1138 pl330_update_pc(ch, insn); 1139 ch->watchdog_timer = 0; 1140 return 1; 1141 /* WDT only active in exec state */ 1142 } else if (ch->state == pl330_chan_executing) { 1143 ch->watchdog_timer++; 1144 if (ch->watchdog_timer >= PL330_WATCHDOG_LIMIT) { 1145 pl330_fault(ch, PL330_FAULT_LOCKUP_ERR); 1146 } 1147 } 1148 return 0; 1149 } 1150 1151 /* Try to execute 1 instruction in each channel, one instruction from read 1152 queue and one instruction from write queue. Number of successfully executed 1153 instructions is returned. */ 1154 static int pl330_exec_cycle(PL330Chan *channel) 1155 { 1156 PL330State *s = channel->parent; 1157 PL330QueueEntry *q; 1158 int i; 1159 int num_exec = 0; 1160 int fifo_res = 0; 1161 uint8_t buf[PL330_MAX_BURST_LEN]; 1162 1163 /* Execute one instruction in each channel */ 1164 num_exec += pl330_chan_exec(channel); 1165 1166 /* Execute one instruction from read queue */ 1167 q = pl330_queue_find_insn(&s->read_queue, PL330_UNTAGGED, true); 1168 if (q != NULL && q->len <= pl330_fifo_num_free(&s->fifo)) { 1169 int len = q->len - (q->addr & (q->len - 1)); 1170 1171 dma_memory_read(&address_space_memory, q->addr, buf, len); 1172 if (PL330_ERR_DEBUG > 1) { 1173 DB_PRINT("PL330 read from memory @%08" PRIx32 " (size = %08x):\n", 1174 q->addr, len); 1175 qemu_hexdump((char *)buf, stderr, "", len); 1176 } 1177 fifo_res = pl330_fifo_push(&s->fifo, buf, len, q->tag); 1178 if (fifo_res == PL330_FIFO_OK) { 1179 if (q->inc) { 1180 q->addr += len; 1181 } 1182 q->n--; 1183 if (!q->n) { 1184 pl330_queue_remove_insn(&s->read_queue, q); 1185 } 1186 num_exec++; 1187 } 1188 } 1189 1190 /* Execute one instruction from write queue. */ 1191 q = pl330_queue_find_insn(&s->write_queue, pl330_fifo_tag(&s->fifo), true); 1192 if (q != NULL) { 1193 int len = q->len - (q->addr & (q->len - 1)); 1194 1195 if (q->z) { 1196 for (i = 0; i < len; i++) { 1197 buf[i] = 0; 1198 } 1199 } else { 1200 fifo_res = pl330_fifo_get(&s->fifo, buf, len, q->tag); 1201 } 1202 if (fifo_res == PL330_FIFO_OK || q->z) { 1203 dma_memory_write(&address_space_memory, q->addr, buf, len); 1204 if (PL330_ERR_DEBUG > 1) { 1205 DB_PRINT("PL330 read from memory @%08" PRIx32 1206 " (size = %08x):\n", q->addr, len); 1207 qemu_hexdump((char *)buf, stderr, "", len); 1208 } 1209 if (q->inc) { 1210 q->addr += len; 1211 } 1212 num_exec++; 1213 } else if (fifo_res == PL330_FIFO_STALL) { 1214 pl330_fault(&channel->parent->chan[q->tag], 1215 PL330_FAULT_FIFOEMPTY_ERR); 1216 } 1217 q->n--; 1218 if (!q->n) { 1219 pl330_queue_remove_insn(&s->write_queue, q); 1220 } 1221 } 1222 1223 return num_exec; 1224 } 1225 1226 static int pl330_exec_channel(PL330Chan *channel) 1227 { 1228 int insr_exec = 0; 1229 1230 /* TODO: Is it all right to execute everything or should we do per-cycle 1231 simulation? */ 1232 while (pl330_exec_cycle(channel)) { 1233 insr_exec++; 1234 } 1235 1236 /* Detect deadlock */ 1237 if (channel->state == pl330_chan_executing) { 1238 pl330_fault(channel, PL330_FAULT_LOCKUP_ERR); 1239 } 1240 /* Situation when one of the queues has deadlocked but all channels 1241 * have finished their programs should be impossible. 1242 */ 1243 1244 return insr_exec; 1245 } 1246 1247 static inline void pl330_exec(PL330State *s) 1248 { 1249 DB_PRINT("\n"); 1250 int i, insr_exec; 1251 do { 1252 insr_exec = pl330_exec_channel(&s->manager); 1253 1254 for (i = 0; i < s->num_chnls; i++) { 1255 insr_exec += pl330_exec_channel(&s->chan[i]); 1256 } 1257 } while (insr_exec); 1258 } 1259 1260 static void pl330_exec_cycle_timer(void *opaque) 1261 { 1262 PL330State *s = (PL330State *)opaque; 1263 pl330_exec(s); 1264 } 1265 1266 /* Stop or restore dma operations */ 1267 1268 static void pl330_dma_stop_irq(void *opaque, int irq, int level) 1269 { 1270 PL330State *s = (PL330State *)opaque; 1271 1272 if (s->periph_busy[irq] != level) { 1273 s->periph_busy[irq] = level; 1274 timer_mod(s->timer, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL)); 1275 } 1276 } 1277 1278 static void pl330_debug_exec(PL330State *s) 1279 { 1280 uint8_t args[5]; 1281 uint8_t opcode; 1282 uint8_t chan_id; 1283 int i; 1284 PL330Chan *ch; 1285 const PL330InsnDesc *insn; 1286 1287 s->debug_status = 1; 1288 chan_id = (s->dbg[0] >> 8) & 0x07; 1289 opcode = (s->dbg[0] >> 16) & 0xff; 1290 args[0] = (s->dbg[0] >> 24) & 0xff; 1291 args[1] = (s->dbg[1] >> 0) & 0xff; 1292 args[2] = (s->dbg[1] >> 8) & 0xff; 1293 args[3] = (s->dbg[1] >> 16) & 0xff; 1294 args[4] = (s->dbg[1] >> 24) & 0xff; 1295 DB_PRINT("chan id: %" PRIx8 "\n", chan_id); 1296 if (s->dbg[0] & 1) { 1297 ch = &s->chan[chan_id]; 1298 } else { 1299 ch = &s->manager; 1300 } 1301 insn = NULL; 1302 for (i = 0; debug_insn_desc[i].size; i++) { 1303 if ((opcode & debug_insn_desc[i].opmask) == debug_insn_desc[i].opcode) { 1304 insn = &debug_insn_desc[i]; 1305 } 1306 } 1307 if (!insn) { 1308 pl330_fault(ch, PL330_FAULT_UNDEF_INSTR | PL330_FAULT_DBG_INSTR); 1309 return ; 1310 } 1311 ch->stall = 0; 1312 insn->exec(ch, opcode, args, insn->size - 1); 1313 if (ch->fault_type) { 1314 ch->fault_type |= PL330_FAULT_DBG_INSTR; 1315 } 1316 if (ch->stall) { 1317 qemu_log_mask(LOG_UNIMP, "pl330: stall of debug instruction not " 1318 "implemented\n"); 1319 } 1320 s->debug_status = 0; 1321 } 1322 1323 /* IOMEM mapped registers */ 1324 1325 static void pl330_iomem_write(void *opaque, hwaddr offset, 1326 uint64_t value, unsigned size) 1327 { 1328 PL330State *s = (PL330State *) opaque; 1329 int i; 1330 1331 DB_PRINT("addr: %08x data: %08x\n", (unsigned)offset, (unsigned)value); 1332 1333 switch (offset) { 1334 case PL330_REG_INTEN: 1335 s->inten = value; 1336 break; 1337 case PL330_REG_INTCLR: 1338 for (i = 0; i < s->num_events; i++) { 1339 if (s->int_status & s->inten & value & (1 << i)) { 1340 DB_PRINT("event interrupt lowered %d\n", i); 1341 qemu_irq_lower(s->irq[i]); 1342 } 1343 } 1344 s->ev_status &= ~(value & s->inten); 1345 s->int_status &= ~(value & s->inten); 1346 break; 1347 case PL330_REG_DBGCMD: 1348 if ((value & 3) == 0) { 1349 pl330_debug_exec(s); 1350 pl330_exec(s); 1351 } else { 1352 qemu_log_mask(LOG_GUEST_ERROR, "pl330: write of illegal value %u " 1353 "for offset " TARGET_FMT_plx "\n", (unsigned)value, 1354 offset); 1355 } 1356 break; 1357 case PL330_REG_DBGINST0: 1358 DB_PRINT("s->dbg[0] = %08x\n", (unsigned)value); 1359 s->dbg[0] = value; 1360 break; 1361 case PL330_REG_DBGINST1: 1362 DB_PRINT("s->dbg[1] = %08x\n", (unsigned)value); 1363 s->dbg[1] = value; 1364 break; 1365 default: 1366 qemu_log_mask(LOG_GUEST_ERROR, "pl330: bad write offset " TARGET_FMT_plx 1367 "\n", offset); 1368 break; 1369 } 1370 } 1371 1372 static inline uint32_t pl330_iomem_read_imp(void *opaque, 1373 hwaddr offset) 1374 { 1375 PL330State *s = (PL330State *)opaque; 1376 int chan_id; 1377 int i; 1378 uint32_t res; 1379 1380 if (offset >= PL330_REG_PERIPH_ID && offset < PL330_REG_PERIPH_ID + 32) { 1381 return pl330_id[(offset - PL330_REG_PERIPH_ID) >> 2]; 1382 } 1383 if (offset >= PL330_REG_CR0_BASE && offset < PL330_REG_CR0_BASE + 24) { 1384 return s->cfg[(offset - PL330_REG_CR0_BASE) >> 2]; 1385 } 1386 if (offset >= PL330_REG_CHANCTRL && offset < PL330_REG_DBGSTATUS) { 1387 offset -= PL330_REG_CHANCTRL; 1388 chan_id = offset >> 5; 1389 if (chan_id >= s->num_chnls) { 1390 qemu_log_mask(LOG_GUEST_ERROR, "pl330: bad read offset " 1391 TARGET_FMT_plx "\n", offset); 1392 return 0; 1393 } 1394 switch (offset & 0x1f) { 1395 case 0x00: 1396 return s->chan[chan_id].src; 1397 case 0x04: 1398 return s->chan[chan_id].dst; 1399 case 0x08: 1400 return s->chan[chan_id].control; 1401 case 0x0C: 1402 return s->chan[chan_id].lc[0]; 1403 case 0x10: 1404 return s->chan[chan_id].lc[1]; 1405 default: 1406 qemu_log_mask(LOG_GUEST_ERROR, "pl330: bad read offset " 1407 TARGET_FMT_plx "\n", offset); 1408 return 0; 1409 } 1410 } 1411 if (offset >= PL330_REG_CSR_BASE && offset < 0x400) { 1412 offset -= PL330_REG_CSR_BASE; 1413 chan_id = offset >> 3; 1414 if (chan_id >= s->num_chnls) { 1415 qemu_log_mask(LOG_GUEST_ERROR, "pl330: bad read offset " 1416 TARGET_FMT_plx "\n", offset); 1417 return 0; 1418 } 1419 switch ((offset >> 2) & 1) { 1420 case 0x0: 1421 res = (s->chan[chan_id].ns << 21) | 1422 (s->chan[chan_id].wakeup << 4) | 1423 (s->chan[chan_id].state) | 1424 (s->chan[chan_id].wfp_sbp << 14); 1425 return res; 1426 case 0x1: 1427 return s->chan[chan_id].pc; 1428 default: 1429 qemu_log_mask(LOG_GUEST_ERROR, "pl330: read error\n"); 1430 return 0; 1431 } 1432 } 1433 if (offset >= PL330_REG_FTR_BASE && offset < 0x100) { 1434 offset -= PL330_REG_FTR_BASE; 1435 chan_id = offset >> 2; 1436 if (chan_id >= s->num_chnls) { 1437 qemu_log_mask(LOG_GUEST_ERROR, "pl330: bad read offset " 1438 TARGET_FMT_plx "\n", offset); 1439 return 0; 1440 } 1441 return s->chan[chan_id].fault_type; 1442 } 1443 switch (offset) { 1444 case PL330_REG_DSR: 1445 return (s->manager.ns << 9) | (s->manager.wakeup << 4) | 1446 (s->manager.state & 0xf); 1447 case PL330_REG_DPC: 1448 return s->manager.pc; 1449 case PL330_REG_INTEN: 1450 return s->inten; 1451 case PL330_REG_INT_EVENT_RIS: 1452 return s->ev_status; 1453 case PL330_REG_INTMIS: 1454 return s->int_status; 1455 case PL330_REG_INTCLR: 1456 /* Documentation says that we can't read this register 1457 * but linux kernel does it 1458 */ 1459 return 0; 1460 case PL330_REG_FSRD: 1461 return s->manager.state ? 1 : 0; 1462 case PL330_REG_FSRC: 1463 res = 0; 1464 for (i = 0; i < s->num_chnls; i++) { 1465 if (s->chan[i].state == pl330_chan_fault || 1466 s->chan[i].state == pl330_chan_fault_completing) { 1467 res |= 1 << i; 1468 } 1469 } 1470 return res; 1471 case PL330_REG_FTRD: 1472 return s->manager.fault_type; 1473 case PL330_REG_DBGSTATUS: 1474 return s->debug_status; 1475 default: 1476 qemu_log_mask(LOG_GUEST_ERROR, "pl330: bad read offset " 1477 TARGET_FMT_plx "\n", offset); 1478 } 1479 return 0; 1480 } 1481 1482 static uint64_t pl330_iomem_read(void *opaque, hwaddr offset, 1483 unsigned size) 1484 { 1485 uint32_t ret = pl330_iomem_read_imp(opaque, offset); 1486 DB_PRINT("addr: %08" HWADDR_PRIx " data: %08" PRIx32 "\n", offset, ret); 1487 return ret; 1488 } 1489 1490 static const MemoryRegionOps pl330_ops = { 1491 .read = pl330_iomem_read, 1492 .write = pl330_iomem_write, 1493 .endianness = DEVICE_NATIVE_ENDIAN, 1494 .impl = { 1495 .min_access_size = 4, 1496 .max_access_size = 4, 1497 } 1498 }; 1499 1500 /* Controller logic and initialization */ 1501 1502 static void pl330_chan_reset(PL330Chan *ch) 1503 { 1504 ch->src = 0; 1505 ch->dst = 0; 1506 ch->pc = 0; 1507 ch->state = pl330_chan_stopped; 1508 ch->watchdog_timer = 0; 1509 ch->stall = 0; 1510 ch->control = 0; 1511 ch->status = 0; 1512 ch->fault_type = 0; 1513 } 1514 1515 static void pl330_reset(DeviceState *d) 1516 { 1517 int i; 1518 PL330State *s = PL330(d); 1519 1520 s->inten = 0; 1521 s->int_status = 0; 1522 s->ev_status = 0; 1523 s->debug_status = 0; 1524 s->num_faulting = 0; 1525 s->manager.ns = s->mgr_ns_at_rst; 1526 pl330_fifo_reset(&s->fifo); 1527 pl330_queue_reset(&s->read_queue); 1528 pl330_queue_reset(&s->write_queue); 1529 1530 for (i = 0; i < s->num_chnls; i++) { 1531 pl330_chan_reset(&s->chan[i]); 1532 } 1533 for (i = 0; i < s->num_periph_req; i++) { 1534 s->periph_busy[i] = 0; 1535 } 1536 1537 timer_del(s->timer); 1538 } 1539 1540 static void pl330_realize(DeviceState *dev, Error **errp) 1541 { 1542 int i; 1543 PL330State *s = PL330(dev); 1544 1545 sysbus_init_irq(SYS_BUS_DEVICE(dev), &s->irq_abort); 1546 memory_region_init_io(&s->iomem, OBJECT(s), &pl330_ops, s, 1547 "dma", PL330_IOMEM_SIZE); 1548 sysbus_init_mmio(SYS_BUS_DEVICE(dev), &s->iomem); 1549 1550 s->timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, pl330_exec_cycle_timer, s); 1551 1552 s->cfg[0] = (s->mgr_ns_at_rst ? 0x4 : 0) | 1553 (s->num_periph_req > 0 ? 1 : 0) | 1554 ((s->num_chnls - 1) & 0x7) << 4 | 1555 ((s->num_periph_req - 1) & 0x1f) << 12 | 1556 ((s->num_events - 1) & 0x1f) << 17; 1557 1558 switch (s->i_cache_len) { 1559 case (4): 1560 s->cfg[1] |= 2; 1561 break; 1562 case (8): 1563 s->cfg[1] |= 3; 1564 break; 1565 case (16): 1566 s->cfg[1] |= 4; 1567 break; 1568 case (32): 1569 s->cfg[1] |= 5; 1570 break; 1571 default: 1572 error_setg(errp, "Bad value for i-cache_len property: %" PRIx8, 1573 s->i_cache_len); 1574 return; 1575 } 1576 s->cfg[1] |= ((s->num_i_cache_lines - 1) & 0xf) << 4; 1577 1578 s->chan = g_new0(PL330Chan, s->num_chnls); 1579 s->hi_seqn = g_new0(uint8_t, s->num_chnls); 1580 s->lo_seqn = g_new0(uint8_t, s->num_chnls); 1581 for (i = 0; i < s->num_chnls; i++) { 1582 s->chan[i].parent = s; 1583 s->chan[i].tag = (uint8_t)i; 1584 } 1585 s->manager.parent = s; 1586 s->manager.tag = s->num_chnls; 1587 s->manager.is_manager = true; 1588 1589 s->irq = g_new0(qemu_irq, s->num_events); 1590 for (i = 0; i < s->num_events; i++) { 1591 sysbus_init_irq(SYS_BUS_DEVICE(dev), &s->irq[i]); 1592 } 1593 1594 qdev_init_gpio_in(dev, pl330_dma_stop_irq, PL330_PERIPH_NUM); 1595 1596 switch (s->data_width) { 1597 case (32): 1598 s->cfg[CFG_CRD] |= 0x2; 1599 break; 1600 case (64): 1601 s->cfg[CFG_CRD] |= 0x3; 1602 break; 1603 case (128): 1604 s->cfg[CFG_CRD] |= 0x4; 1605 break; 1606 default: 1607 error_setg(errp, "Bad value for data_width property: %" PRIx8, 1608 s->data_width); 1609 return; 1610 } 1611 1612 s->cfg[CFG_CRD] |= ((s->wr_cap - 1) & 0x7) << 4 | 1613 ((s->wr_q_dep - 1) & 0xf) << 8 | 1614 ((s->rd_cap - 1) & 0x7) << 12 | 1615 ((s->rd_q_dep - 1) & 0xf) << 16 | 1616 ((s->data_buffer_dep - 1) & 0x1ff) << 20; 1617 1618 pl330_queue_init(&s->read_queue, s->rd_q_dep, s); 1619 pl330_queue_init(&s->write_queue, s->wr_q_dep, s); 1620 pl330_fifo_init(&s->fifo, s->data_width / 4 * s->data_buffer_dep); 1621 } 1622 1623 static Property pl330_properties[] = { 1624 /* CR0 */ 1625 DEFINE_PROP_UINT32("num_chnls", PL330State, num_chnls, 8), 1626 DEFINE_PROP_UINT8("num_periph_req", PL330State, num_periph_req, 4), 1627 DEFINE_PROP_UINT8("num_events", PL330State, num_events, 16), 1628 DEFINE_PROP_UINT8("mgr_ns_at_rst", PL330State, mgr_ns_at_rst, 0), 1629 /* CR1 */ 1630 DEFINE_PROP_UINT8("i-cache_len", PL330State, i_cache_len, 4), 1631 DEFINE_PROP_UINT8("num_i-cache_lines", PL330State, num_i_cache_lines, 8), 1632 /* CR2-4 */ 1633 DEFINE_PROP_UINT32("boot_addr", PL330State, cfg[CFG_BOOT_ADDR], 0), 1634 DEFINE_PROP_UINT32("INS", PL330State, cfg[CFG_INS], 0), 1635 DEFINE_PROP_UINT32("PNS", PL330State, cfg[CFG_PNS], 0), 1636 /* CRD */ 1637 DEFINE_PROP_UINT8("data_width", PL330State, data_width, 64), 1638 DEFINE_PROP_UINT8("wr_cap", PL330State, wr_cap, 8), 1639 DEFINE_PROP_UINT8("wr_q_dep", PL330State, wr_q_dep, 16), 1640 DEFINE_PROP_UINT8("rd_cap", PL330State, rd_cap, 8), 1641 DEFINE_PROP_UINT8("rd_q_dep", PL330State, rd_q_dep, 16), 1642 DEFINE_PROP_UINT16("data_buffer_dep", PL330State, data_buffer_dep, 256), 1643 1644 DEFINE_PROP_END_OF_LIST(), 1645 }; 1646 1647 static void pl330_class_init(ObjectClass *klass, void *data) 1648 { 1649 DeviceClass *dc = DEVICE_CLASS(klass); 1650 1651 dc->realize = pl330_realize; 1652 dc->reset = pl330_reset; 1653 dc->props = pl330_properties; 1654 dc->vmsd = &vmstate_pl330; 1655 } 1656 1657 static const TypeInfo pl330_type_info = { 1658 .name = TYPE_PL330, 1659 .parent = TYPE_SYS_BUS_DEVICE, 1660 .instance_size = sizeof(PL330State), 1661 .class_init = pl330_class_init, 1662 }; 1663 1664 static void pl330_register_types(void) 1665 { 1666 type_register_static(&pl330_type_info); 1667 } 1668 1669 type_init(pl330_register_types) 1670