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/irq.h" 19 #include "hw/qdev-properties.h" 20 #include "hw/sysbus.h" 21 #include "migration/vmstate.h" 22 #include "qapi/error.h" 23 #include "qemu/timer.h" 24 #include "sysemu/dma.h" 25 #include "qemu/log.h" 26 #include "qemu/module.h" 27 #include "trace.h" 28 #include "qom/object.h" 29 30 #ifndef PL330_ERR_DEBUG 31 #define PL330_ERR_DEBUG 0 32 #endif 33 34 #define PL330_PERIPH_NUM 32 35 #define PL330_MAX_BURST_LEN 128 36 #define PL330_INSN_MAXSIZE 6 37 38 #define PL330_FIFO_OK 0 39 #define PL330_FIFO_STALL 1 40 #define PL330_FIFO_ERR (-1) 41 42 #define PL330_FAULT_UNDEF_INSTR (1 << 0) 43 #define PL330_FAULT_OPERAND_INVALID (1 << 1) 44 #define PL330_FAULT_DMAGO_ERR (1 << 4) 45 #define PL330_FAULT_EVENT_ERR (1 << 5) 46 #define PL330_FAULT_CH_PERIPH_ERR (1 << 6) 47 #define PL330_FAULT_CH_RDWR_ERR (1 << 7) 48 #define PL330_FAULT_ST_DATA_UNAVAILABLE (1 << 12) 49 #define PL330_FAULT_FIFOEMPTY_ERR (1 << 13) 50 #define PL330_FAULT_INSTR_FETCH_ERR (1 << 16) 51 #define PL330_FAULT_DATA_WRITE_ERR (1 << 17) 52 #define PL330_FAULT_DATA_READ_ERR (1 << 18) 53 #define PL330_FAULT_DBG_INSTR (1 << 30) 54 #define PL330_FAULT_LOCKUP_ERR (1 << 31) 55 56 #define PL330_UNTAGGED 0xff 57 58 #define PL330_SINGLE 0x0 59 #define PL330_BURST 0x1 60 61 #define PL330_WATCHDOG_LIMIT 1024 62 63 /* IOMEM mapped registers */ 64 #define PL330_REG_DSR 0x000 65 #define PL330_REG_DPC 0x004 66 #define PL330_REG_INTEN 0x020 67 #define PL330_REG_INT_EVENT_RIS 0x024 68 #define PL330_REG_INTMIS 0x028 69 #define PL330_REG_INTCLR 0x02C 70 #define PL330_REG_FSRD 0x030 71 #define PL330_REG_FSRC 0x034 72 #define PL330_REG_FTRD 0x038 73 #define PL330_REG_FTR_BASE 0x040 74 #define PL330_REG_CSR_BASE 0x100 75 #define PL330_REG_CPC_BASE 0x104 76 #define PL330_REG_CHANCTRL 0x400 77 #define PL330_REG_DBGSTATUS 0xD00 78 #define PL330_REG_DBGCMD 0xD04 79 #define PL330_REG_DBGINST0 0xD08 80 #define PL330_REG_DBGINST1 0xD0C 81 #define PL330_REG_CR0_BASE 0xE00 82 #define PL330_REG_PERIPH_ID 0xFE0 83 84 #define PL330_IOMEM_SIZE 0x1000 85 86 #define CFG_BOOT_ADDR 2 87 #define CFG_INS 3 88 #define CFG_PNS 4 89 #define CFG_CRD 5 90 91 static const uint32_t pl330_id[] = { 92 0x30, 0x13, 0x24, 0x00, 0x0D, 0xF0, 0x05, 0xB1 93 }; 94 95 /* DMA channel states as they are described in PL330 Technical Reference Manual 96 * Most of them will not be used in emulation. 97 */ 98 typedef enum { 99 pl330_chan_stopped = 0, 100 pl330_chan_executing = 1, 101 pl330_chan_cache_miss = 2, 102 pl330_chan_updating_pc = 3, 103 pl330_chan_waiting_event = 4, 104 pl330_chan_at_barrier = 5, 105 pl330_chan_queue_busy = 6, 106 pl330_chan_waiting_periph = 7, 107 pl330_chan_killing = 8, 108 pl330_chan_completing = 9, 109 pl330_chan_fault_completing = 14, 110 pl330_chan_fault = 15, 111 } PL330ChanState; 112 113 typedef struct PL330State PL330State; 114 115 typedef struct PL330Chan { 116 uint32_t src; 117 uint32_t dst; 118 uint32_t pc; 119 uint32_t control; 120 uint32_t status; 121 uint32_t lc[2]; 122 uint32_t fault_type; 123 uint32_t watchdog_timer; 124 125 bool ns; 126 uint8_t request_flag; 127 uint8_t wakeup; 128 uint8_t wfp_sbp; 129 130 uint8_t state; 131 uint8_t stall; 132 133 bool is_manager; 134 PL330State *parent; 135 uint8_t tag; 136 } PL330Chan; 137 138 static const VMStateDescription vmstate_pl330_chan = { 139 .name = "pl330_chan", 140 .version_id = 1, 141 .minimum_version_id = 1, 142 .fields = (const VMStateField[]) { 143 VMSTATE_UINT32(src, PL330Chan), 144 VMSTATE_UINT32(dst, PL330Chan), 145 VMSTATE_UINT32(pc, PL330Chan), 146 VMSTATE_UINT32(control, PL330Chan), 147 VMSTATE_UINT32(status, PL330Chan), 148 VMSTATE_UINT32_ARRAY(lc, PL330Chan, 2), 149 VMSTATE_UINT32(fault_type, PL330Chan), 150 VMSTATE_UINT32(watchdog_timer, PL330Chan), 151 VMSTATE_BOOL(ns, PL330Chan), 152 VMSTATE_UINT8(request_flag, PL330Chan), 153 VMSTATE_UINT8(wakeup, PL330Chan), 154 VMSTATE_UINT8(wfp_sbp, PL330Chan), 155 VMSTATE_UINT8(state, PL330Chan), 156 VMSTATE_UINT8(stall, PL330Chan), 157 VMSTATE_END_OF_LIST() 158 } 159 }; 160 161 typedef struct PL330Fifo { 162 uint8_t *buf; 163 uint8_t *tag; 164 uint32_t head; 165 uint32_t num; 166 uint32_t buf_size; 167 } PL330Fifo; 168 169 static const VMStateDescription vmstate_pl330_fifo = { 170 .name = "pl330_chan", 171 .version_id = 1, 172 .minimum_version_id = 1, 173 .fields = (const VMStateField[]) { 174 VMSTATE_VBUFFER_UINT32(buf, PL330Fifo, 1, NULL, buf_size), 175 VMSTATE_VBUFFER_UINT32(tag, PL330Fifo, 1, NULL, buf_size), 176 VMSTATE_UINT32(head, PL330Fifo), 177 VMSTATE_UINT32(num, PL330Fifo), 178 VMSTATE_UINT32(buf_size, PL330Fifo), 179 VMSTATE_END_OF_LIST() 180 } 181 }; 182 183 typedef struct PL330QueueEntry { 184 uint32_t addr; 185 uint32_t len; 186 uint8_t n; 187 bool inc; 188 bool z; 189 uint8_t tag; 190 uint8_t seqn; 191 } PL330QueueEntry; 192 193 static const VMStateDescription vmstate_pl330_queue_entry = { 194 .name = "pl330_queue_entry", 195 .version_id = 1, 196 .minimum_version_id = 1, 197 .fields = (const VMStateField[]) { 198 VMSTATE_UINT32(addr, PL330QueueEntry), 199 VMSTATE_UINT32(len, PL330QueueEntry), 200 VMSTATE_UINT8(n, PL330QueueEntry), 201 VMSTATE_BOOL(inc, PL330QueueEntry), 202 VMSTATE_BOOL(z, PL330QueueEntry), 203 VMSTATE_UINT8(tag, PL330QueueEntry), 204 VMSTATE_UINT8(seqn, PL330QueueEntry), 205 VMSTATE_END_OF_LIST() 206 } 207 }; 208 209 typedef struct PL330Queue { 210 PL330State *parent; 211 PL330QueueEntry *queue; 212 uint32_t queue_size; 213 } PL330Queue; 214 215 static const VMStateDescription vmstate_pl330_queue = { 216 .name = "pl330_queue", 217 .version_id = 2, 218 .minimum_version_id = 2, 219 .fields = (const VMStateField[]) { 220 VMSTATE_STRUCT_VARRAY_POINTER_UINT32(queue, PL330Queue, queue_size, 221 vmstate_pl330_queue_entry, 222 PL330QueueEntry), 223 VMSTATE_END_OF_LIST() 224 } 225 }; 226 227 struct PL330State { 228 SysBusDevice parent_obj; 229 230 MemoryRegion iomem; 231 qemu_irq irq_abort; 232 qemu_irq *irq; 233 234 /* Config registers. cfg[5] = CfgDn. */ 235 uint32_t cfg[6]; 236 #define EVENT_SEC_STATE 3 237 #define PERIPH_SEC_STATE 4 238 /* cfg 0 bits and pieces */ 239 uint32_t num_chnls; 240 uint8_t num_periph_req; 241 uint8_t num_events; 242 uint8_t mgr_ns_at_rst; 243 /* cfg 1 bits and pieces */ 244 uint8_t i_cache_len; 245 uint8_t num_i_cache_lines; 246 /* CRD bits and pieces */ 247 uint8_t data_width; 248 uint8_t wr_cap; 249 uint8_t wr_q_dep; 250 uint8_t rd_cap; 251 uint8_t rd_q_dep; 252 uint16_t data_buffer_dep; 253 254 PL330Chan manager; 255 PL330Chan *chan; 256 PL330Fifo fifo; 257 PL330Queue read_queue; 258 PL330Queue write_queue; 259 uint8_t *lo_seqn; 260 uint8_t *hi_seqn; 261 QEMUTimer *timer; /* is used for restore dma. */ 262 263 uint32_t inten; 264 uint32_t int_status; 265 uint32_t ev_status; 266 uint32_t dbg[2]; 267 uint8_t debug_status; 268 uint8_t num_faulting; 269 uint8_t periph_busy[PL330_PERIPH_NUM]; 270 271 /* Memory region that DMA operation access */ 272 MemoryRegion *mem_mr; 273 AddressSpace *mem_as; 274 }; 275 276 #define TYPE_PL330 "pl330" 277 OBJECT_DECLARE_SIMPLE_TYPE(PL330State, PL330) 278 279 static const VMStateDescription vmstate_pl330 = { 280 .name = "pl330", 281 .version_id = 2, 282 .minimum_version_id = 2, 283 .fields = (const VMStateField[]) { 284 VMSTATE_STRUCT(manager, PL330State, 0, vmstate_pl330_chan, PL330Chan), 285 VMSTATE_STRUCT_VARRAY_POINTER_UINT32(chan, PL330State, num_chnls, 286 vmstate_pl330_chan, PL330Chan), 287 VMSTATE_VBUFFER_UINT32(lo_seqn, PL330State, 1, NULL, num_chnls), 288 VMSTATE_VBUFFER_UINT32(hi_seqn, PL330State, 1, NULL, num_chnls), 289 VMSTATE_STRUCT(fifo, PL330State, 0, vmstate_pl330_fifo, PL330Fifo), 290 VMSTATE_STRUCT(read_queue, PL330State, 0, vmstate_pl330_queue, 291 PL330Queue), 292 VMSTATE_STRUCT(write_queue, PL330State, 0, vmstate_pl330_queue, 293 PL330Queue), 294 VMSTATE_TIMER_PTR(timer, PL330State), 295 VMSTATE_UINT32(inten, PL330State), 296 VMSTATE_UINT32(int_status, PL330State), 297 VMSTATE_UINT32(ev_status, PL330State), 298 VMSTATE_UINT32_ARRAY(dbg, PL330State, 2), 299 VMSTATE_UINT8(debug_status, PL330State), 300 VMSTATE_UINT8(num_faulting, PL330State), 301 VMSTATE_UINT8_ARRAY(periph_busy, PL330State, PL330_PERIPH_NUM), 302 VMSTATE_END_OF_LIST() 303 } 304 }; 305 306 typedef struct PL330InsnDesc { 307 /* OPCODE of the instruction */ 308 uint8_t opcode; 309 /* Mask so we can select several sibling instructions, such as 310 DMALD, DMALDS and DMALDB */ 311 uint8_t opmask; 312 /* Size of instruction in bytes */ 313 uint8_t size; 314 /* Interpreter */ 315 void (*exec)(PL330Chan *, uint8_t opcode, uint8_t *args, int len); 316 } PL330InsnDesc; 317 318 static void pl330_hexdump(uint8_t *buf, size_t size) 319 { 320 unsigned int b, i, len; 321 char tmpbuf[80]; 322 323 for (b = 0; b < size; b += 16) { 324 len = size - b; 325 if (len > 16) { 326 len = 16; 327 } 328 tmpbuf[0] = '\0'; 329 for (i = 0; i < len; i++) { 330 if ((i % 4) == 0) { 331 strcat(tmpbuf, " "); 332 } 333 sprintf(tmpbuf + strlen(tmpbuf), " %02x", buf[b + i]); 334 } 335 trace_pl330_hexdump(b, tmpbuf); 336 } 337 } 338 339 /* MFIFO Implementation 340 * 341 * MFIFO is implemented as a cyclic buffer of BUF_SIZE size. Tagged bytes are 342 * stored in this buffer. Data is stored in BUF field, tags - in the 343 * corresponding array elements of TAG field. 344 */ 345 346 /* Initialize queue. */ 347 348 static void pl330_fifo_init(PL330Fifo *s, uint32_t size) 349 { 350 s->buf = g_malloc0(size); 351 s->tag = g_malloc0(size); 352 s->buf_size = size; 353 } 354 355 /* Cyclic increment */ 356 357 static inline int pl330_fifo_inc(PL330Fifo *s, int x) 358 { 359 return (x + 1) % s->buf_size; 360 } 361 362 /* Number of empty bytes in MFIFO */ 363 364 static inline int pl330_fifo_num_free(PL330Fifo *s) 365 { 366 return s->buf_size - s->num; 367 } 368 369 /* Push LEN bytes of data stored in BUF to MFIFO and tag it with TAG. 370 * Zero returned on success, PL330_FIFO_STALL if there is no enough free 371 * space in MFIFO to store requested amount of data. If push was unsuccessful 372 * no data is stored to MFIFO. 373 */ 374 375 static int pl330_fifo_push(PL330Fifo *s, uint8_t *buf, int len, uint8_t tag) 376 { 377 int i; 378 379 if (s->buf_size - s->num < len) { 380 return PL330_FIFO_STALL; 381 } 382 for (i = 0; i < len; i++) { 383 int push_idx = (s->head + s->num + i) % s->buf_size; 384 s->buf[push_idx] = buf[i]; 385 s->tag[push_idx] = tag; 386 } 387 s->num += len; 388 return PL330_FIFO_OK; 389 } 390 391 /* Get LEN bytes of data from MFIFO and store it to BUF. Tag value of each 392 * byte is verified. Zero returned on success, PL330_FIFO_ERR on tag mismatch 393 * and PL330_FIFO_STALL if there is no enough data in MFIFO. If get was 394 * unsuccessful no data is removed from MFIFO. 395 */ 396 397 static int pl330_fifo_get(PL330Fifo *s, uint8_t *buf, int len, uint8_t tag) 398 { 399 int i; 400 401 if (s->num < len) { 402 return PL330_FIFO_STALL; 403 } 404 for (i = 0; i < len; i++) { 405 if (s->tag[s->head] == tag) { 406 int get_idx = (s->head + i) % s->buf_size; 407 buf[i] = s->buf[get_idx]; 408 } else { /* Tag mismatch - Rollback transaction */ 409 return PL330_FIFO_ERR; 410 } 411 } 412 s->head = (s->head + len) % s->buf_size; 413 s->num -= len; 414 return PL330_FIFO_OK; 415 } 416 417 /* Reset MFIFO. This completely erases all data in it. */ 418 419 static inline void pl330_fifo_reset(PL330Fifo *s) 420 { 421 s->head = 0; 422 s->num = 0; 423 } 424 425 /* Return tag of the first byte stored in MFIFO. If MFIFO is empty 426 * PL330_UNTAGGED is returned. 427 */ 428 429 static inline uint8_t pl330_fifo_tag(PL330Fifo *s) 430 { 431 return (!s->num) ? PL330_UNTAGGED : s->tag[s->head]; 432 } 433 434 /* Returns non-zero if tag TAG is present in fifo or zero otherwise */ 435 436 static int pl330_fifo_has_tag(PL330Fifo *s, uint8_t tag) 437 { 438 int i, n; 439 440 i = s->head; 441 for (n = 0; n < s->num; n++) { 442 if (s->tag[i] == tag) { 443 return 1; 444 } 445 i = pl330_fifo_inc(s, i); 446 } 447 return 0; 448 } 449 450 /* Remove all entry tagged with TAG from MFIFO */ 451 452 static void pl330_fifo_tagged_remove(PL330Fifo *s, uint8_t tag) 453 { 454 int i, t, n; 455 456 t = i = s->head; 457 for (n = 0; n < s->num; n++) { 458 if (s->tag[i] != tag) { 459 s->buf[t] = s->buf[i]; 460 s->tag[t] = s->tag[i]; 461 t = pl330_fifo_inc(s, t); 462 } else { 463 s->num = s->num - 1; 464 } 465 i = pl330_fifo_inc(s, i); 466 } 467 } 468 469 /* Read-Write Queue implementation 470 * 471 * A Read-Write Queue stores up to QUEUE_SIZE instructions (loads or stores). 472 * Each instruction is described by source (for loads) or destination (for 473 * stores) address ADDR, width of data to be loaded/stored LEN, number of 474 * stores/loads to be performed N, INC bit, Z bit and TAG to identify channel 475 * this instruction belongs to. Queue does not store any information about 476 * nature of the instruction: is it load or store. PL330 has different queues 477 * for loads and stores so this is already known at the top level where it 478 * matters. 479 * 480 * Queue works as FIFO for instructions with equivalent tags, but can issue 481 * instructions with different tags in arbitrary order. SEQN field attached to 482 * each instruction helps to achieve this. For each TAG queue contains 483 * instructions with consecutive SEQN values ranging from LO_SEQN[TAG] to 484 * HI_SEQN[TAG]-1 inclusive. SEQN is 8-bit unsigned integer, so SEQN=255 is 485 * followed by SEQN=0. 486 * 487 * Z bit indicates that zeroes should be stored. No MFIFO fetches are performed 488 * in this case. 489 */ 490 491 static void pl330_queue_reset(PL330Queue *s) 492 { 493 int i; 494 495 for (i = 0; i < s->queue_size; i++) { 496 s->queue[i].tag = PL330_UNTAGGED; 497 } 498 } 499 500 /* Initialize queue */ 501 static void pl330_queue_init(PL330Queue *s, int size, PL330State *parent) 502 { 503 s->parent = parent; 504 s->queue = g_new0(PL330QueueEntry, size); 505 s->queue_size = size; 506 } 507 508 /* Returns pointer to an empty slot or NULL if queue is full */ 509 static PL330QueueEntry *pl330_queue_find_empty(PL330Queue *s) 510 { 511 int i; 512 513 for (i = 0; i < s->queue_size; i++) { 514 if (s->queue[i].tag == PL330_UNTAGGED) { 515 return &s->queue[i]; 516 } 517 } 518 return NULL; 519 } 520 521 /* Put instruction in queue. 522 * Return value: 523 * - zero - OK 524 * - non-zero - queue is full 525 */ 526 527 static int pl330_queue_put_insn(PL330Queue *s, uint32_t addr, 528 int len, int n, bool inc, bool z, uint8_t tag) 529 { 530 PL330QueueEntry *entry = pl330_queue_find_empty(s); 531 532 if (!entry) { 533 return 1; 534 } 535 entry->tag = tag; 536 entry->addr = addr; 537 entry->len = len; 538 entry->n = n; 539 entry->z = z; 540 entry->inc = inc; 541 entry->seqn = s->parent->hi_seqn[tag]; 542 s->parent->hi_seqn[tag]++; 543 return 0; 544 } 545 546 /* Returns a pointer to queue slot containing instruction which satisfies 547 * following conditions: 548 * - it has valid tag value (not PL330_UNTAGGED) 549 * - if enforce_seq is set it has to be issuable without violating queue 550 * logic (see above) 551 * - if TAG argument is not PL330_UNTAGGED this instruction has tag value 552 * equivalent to the argument TAG value. 553 * If such instruction cannot be found NULL is returned. 554 */ 555 556 static PL330QueueEntry *pl330_queue_find_insn(PL330Queue *s, uint8_t tag, 557 bool enforce_seq) 558 { 559 int i; 560 561 for (i = 0; i < s->queue_size; i++) { 562 if (s->queue[i].tag != PL330_UNTAGGED) { 563 if ((!enforce_seq || 564 s->queue[i].seqn == s->parent->lo_seqn[s->queue[i].tag]) && 565 (s->queue[i].tag == tag || tag == PL330_UNTAGGED || 566 s->queue[i].z)) { 567 return &s->queue[i]; 568 } 569 } 570 } 571 return NULL; 572 } 573 574 /* Removes instruction from queue. */ 575 576 static inline void pl330_queue_remove_insn(PL330Queue *s, PL330QueueEntry *e) 577 { 578 s->parent->lo_seqn[e->tag]++; 579 e->tag = PL330_UNTAGGED; 580 } 581 582 /* Removes all instructions tagged with TAG from queue. */ 583 584 static inline void pl330_queue_remove_tagged(PL330Queue *s, uint8_t tag) 585 { 586 int i; 587 588 for (i = 0; i < s->queue_size; i++) { 589 if (s->queue[i].tag == tag) { 590 s->queue[i].tag = PL330_UNTAGGED; 591 } 592 } 593 } 594 595 /* DMA instruction execution engine */ 596 597 /* Moves DMA channel to the FAULT state and updates it's status. */ 598 599 static inline void pl330_fault(PL330Chan *ch, uint32_t flags) 600 { 601 trace_pl330_fault(ch, flags); 602 ch->fault_type |= flags; 603 if (ch->state == pl330_chan_fault) { 604 return; 605 } 606 ch->state = pl330_chan_fault; 607 ch->parent->num_faulting++; 608 if (ch->parent->num_faulting == 1) { 609 trace_pl330_fault_abort(); 610 qemu_irq_raise(ch->parent->irq_abort); 611 } 612 } 613 614 /* 615 * For information about instructions see PL330 Technical Reference Manual. 616 * 617 * Arguments: 618 * CH - channel executing the instruction 619 * OPCODE - opcode 620 * ARGS - array of 8-bit arguments 621 * LEN - number of elements in ARGS array 622 */ 623 624 static void pl330_dmaadxh(PL330Chan *ch, uint8_t *args, bool ra, bool neg) 625 { 626 uint32_t im = (args[1] << 8) | args[0]; 627 if (neg) { 628 im |= 0xffffu << 16; 629 } 630 631 if (ch->is_manager) { 632 pl330_fault(ch, PL330_FAULT_UNDEF_INSTR); 633 return; 634 } 635 if (ra) { 636 ch->dst += im; 637 } else { 638 ch->src += im; 639 } 640 } 641 642 static void pl330_dmaaddh(PL330Chan *ch, uint8_t opcode, uint8_t *args, int len) 643 { 644 pl330_dmaadxh(ch, args, extract32(opcode, 1, 1), false); 645 } 646 647 static void pl330_dmaadnh(PL330Chan *ch, uint8_t opcode, uint8_t *args, int len) 648 { 649 pl330_dmaadxh(ch, args, extract32(opcode, 1, 1), true); 650 } 651 652 static void pl330_dmaend(PL330Chan *ch, uint8_t opcode, 653 uint8_t *args, int len) 654 { 655 PL330State *s = ch->parent; 656 657 if (ch->state == pl330_chan_executing && !ch->is_manager) { 658 /* Wait for all transfers to complete */ 659 if (pl330_fifo_has_tag(&s->fifo, ch->tag) || 660 pl330_queue_find_insn(&s->read_queue, ch->tag, false) != NULL || 661 pl330_queue_find_insn(&s->write_queue, ch->tag, false) != NULL) { 662 663 ch->stall = 1; 664 return; 665 } 666 } 667 trace_pl330_dmaend(); 668 pl330_fifo_tagged_remove(&s->fifo, ch->tag); 669 pl330_queue_remove_tagged(&s->read_queue, ch->tag); 670 pl330_queue_remove_tagged(&s->write_queue, ch->tag); 671 ch->state = pl330_chan_stopped; 672 } 673 674 static void pl330_dmaflushp(PL330Chan *ch, uint8_t opcode, 675 uint8_t *args, int len) 676 { 677 uint8_t periph_id; 678 679 if (args[0] & 7) { 680 pl330_fault(ch, PL330_FAULT_OPERAND_INVALID); 681 return; 682 } 683 periph_id = (args[0] >> 3) & 0x1f; 684 if (periph_id >= ch->parent->num_periph_req) { 685 pl330_fault(ch, PL330_FAULT_OPERAND_INVALID); 686 return; 687 } 688 if (ch->ns && !(ch->parent->cfg[CFG_PNS] & (1 << periph_id))) { 689 pl330_fault(ch, PL330_FAULT_CH_PERIPH_ERR); 690 return; 691 } 692 /* Do nothing */ 693 } 694 695 static void pl330_dmago(PL330Chan *ch, uint8_t opcode, uint8_t *args, int len) 696 { 697 uint8_t chan_id; 698 uint8_t ns; 699 uint32_t pc; 700 PL330Chan *s; 701 702 trace_pl330_dmago(); 703 704 if (!ch->is_manager) { 705 pl330_fault(ch, PL330_FAULT_UNDEF_INSTR); 706 return; 707 } 708 ns = !!(opcode & 2); 709 chan_id = args[0] & 7; 710 if ((args[0] >> 3)) { 711 pl330_fault(ch, PL330_FAULT_OPERAND_INVALID); 712 return; 713 } 714 if (chan_id >= ch->parent->num_chnls) { 715 pl330_fault(ch, PL330_FAULT_OPERAND_INVALID); 716 return; 717 } 718 pc = (((uint32_t)args[4]) << 24) | (((uint32_t)args[3]) << 16) | 719 (((uint32_t)args[2]) << 8) | (((uint32_t)args[1])); 720 if (ch->parent->chan[chan_id].state != pl330_chan_stopped) { 721 pl330_fault(ch, PL330_FAULT_OPERAND_INVALID); 722 return; 723 } 724 if (ch->ns && !ns) { 725 pl330_fault(ch, PL330_FAULT_DMAGO_ERR); 726 return; 727 } 728 s = &ch->parent->chan[chan_id]; 729 s->ns = ns; 730 s->pc = pc; 731 s->state = pl330_chan_executing; 732 } 733 734 static void pl330_dmald(PL330Chan *ch, uint8_t opcode, uint8_t *args, int len) 735 { 736 uint8_t bs = opcode & 3; 737 uint32_t size, num; 738 bool inc; 739 740 if (bs == 2) { 741 pl330_fault(ch, PL330_FAULT_OPERAND_INVALID); 742 return; 743 } 744 if ((bs == 1 && ch->request_flag == PL330_BURST) || 745 (bs == 3 && ch->request_flag == PL330_SINGLE)) { 746 /* Perform NOP */ 747 return; 748 } 749 if (bs == 1 && ch->request_flag == PL330_SINGLE) { 750 num = 1; 751 } else { 752 num = ((ch->control >> 4) & 0xf) + 1; 753 } 754 size = (uint32_t)1 << ((ch->control >> 1) & 0x7); 755 inc = !!(ch->control & 1); 756 ch->stall = pl330_queue_put_insn(&ch->parent->read_queue, ch->src, 757 size, num, inc, 0, ch->tag); 758 if (!ch->stall) { 759 trace_pl330_dmald(ch->tag, ch->src, size, num, inc ? 'Y' : 'N'); 760 ch->src += inc ? size * num - (ch->src & (size - 1)) : 0; 761 } 762 } 763 764 static void pl330_dmaldp(PL330Chan *ch, uint8_t opcode, uint8_t *args, int len) 765 { 766 uint8_t periph_id; 767 768 if (args[0] & 7) { 769 pl330_fault(ch, PL330_FAULT_OPERAND_INVALID); 770 return; 771 } 772 periph_id = (args[0] >> 3) & 0x1f; 773 if (periph_id >= ch->parent->num_periph_req) { 774 pl330_fault(ch, PL330_FAULT_OPERAND_INVALID); 775 return; 776 } 777 if (ch->ns && !(ch->parent->cfg[CFG_PNS] & (1 << periph_id))) { 778 pl330_fault(ch, PL330_FAULT_CH_PERIPH_ERR); 779 return; 780 } 781 pl330_dmald(ch, opcode, args, len); 782 } 783 784 static void pl330_dmalp(PL330Chan *ch, uint8_t opcode, uint8_t *args, int len) 785 { 786 uint8_t lc = (opcode & 2) >> 1; 787 788 ch->lc[lc] = args[0]; 789 } 790 791 static void pl330_dmakill(PL330Chan *ch, uint8_t opcode, uint8_t *args, int len) 792 { 793 if (ch->state == pl330_chan_fault || 794 ch->state == pl330_chan_fault_completing) { 795 /* This is the only way for a channel to leave the faulting state */ 796 ch->fault_type = 0; 797 ch->parent->num_faulting--; 798 if (ch->parent->num_faulting == 0) { 799 trace_pl330_dmakill(); 800 qemu_irq_lower(ch->parent->irq_abort); 801 } 802 } 803 ch->state = pl330_chan_killing; 804 pl330_fifo_tagged_remove(&ch->parent->fifo, ch->tag); 805 pl330_queue_remove_tagged(&ch->parent->read_queue, ch->tag); 806 pl330_queue_remove_tagged(&ch->parent->write_queue, ch->tag); 807 ch->state = pl330_chan_stopped; 808 } 809 810 static void pl330_dmalpend(PL330Chan *ch, uint8_t opcode, 811 uint8_t *args, int len) 812 { 813 uint8_t nf = (opcode & 0x10) >> 4; 814 uint8_t bs = opcode & 3; 815 uint8_t lc = (opcode & 4) >> 2; 816 817 trace_pl330_dmalpend(nf, bs, lc, ch->lc[lc], ch->request_flag); 818 819 if (bs == 2) { 820 pl330_fault(ch, PL330_FAULT_OPERAND_INVALID); 821 return; 822 } 823 if ((bs == 1 && ch->request_flag == PL330_BURST) || 824 (bs == 3 && ch->request_flag == PL330_SINGLE)) { 825 /* Perform NOP */ 826 return; 827 } 828 if (!nf || ch->lc[lc]) { 829 if (nf) { 830 ch->lc[lc]--; 831 } 832 trace_pl330_dmalpiter(); 833 ch->pc -= args[0]; 834 ch->pc -= len + 1; 835 /* "ch->pc -= args[0] + len + 1" is incorrect when args[0] == 256 */ 836 } else { 837 trace_pl330_dmalpfallthrough(); 838 } 839 } 840 841 842 static void pl330_dmamov(PL330Chan *ch, uint8_t opcode, uint8_t *args, int len) 843 { 844 uint8_t rd = args[0] & 7; 845 uint32_t im; 846 847 if ((args[0] >> 3)) { 848 pl330_fault(ch, PL330_FAULT_OPERAND_INVALID); 849 return; 850 } 851 im = (((uint32_t)args[4]) << 24) | (((uint32_t)args[3]) << 16) | 852 (((uint32_t)args[2]) << 8) | (((uint32_t)args[1])); 853 switch (rd) { 854 case 0: 855 ch->src = im; 856 break; 857 case 1: 858 ch->control = im; 859 break; 860 case 2: 861 ch->dst = im; 862 break; 863 default: 864 pl330_fault(ch, PL330_FAULT_OPERAND_INVALID); 865 return; 866 } 867 } 868 869 static void pl330_dmanop(PL330Chan *ch, uint8_t opcode, 870 uint8_t *args, int len) 871 { 872 /* NOP is NOP. */ 873 } 874 875 static void pl330_dmarmb(PL330Chan *ch, uint8_t opcode, uint8_t *args, int len) 876 { 877 if (pl330_queue_find_insn(&ch->parent->read_queue, ch->tag, false)) { 878 ch->state = pl330_chan_at_barrier; 879 ch->stall = 1; 880 return; 881 } else { 882 ch->state = pl330_chan_executing; 883 } 884 } 885 886 static void pl330_dmasev(PL330Chan *ch, uint8_t opcode, uint8_t *args, int len) 887 { 888 uint8_t ev_id; 889 890 if (args[0] & 7) { 891 pl330_fault(ch, PL330_FAULT_OPERAND_INVALID); 892 return; 893 } 894 ev_id = (args[0] >> 3) & 0x1f; 895 if (ev_id >= ch->parent->num_events) { 896 pl330_fault(ch, PL330_FAULT_OPERAND_INVALID); 897 return; 898 } 899 if (ch->ns && !(ch->parent->cfg[CFG_INS] & (1 << ev_id))) { 900 pl330_fault(ch, PL330_FAULT_EVENT_ERR); 901 return; 902 } 903 if (ch->parent->inten & (1 << ev_id)) { 904 ch->parent->int_status |= (1 << ev_id); 905 trace_pl330_dmasev_evirq(ev_id); 906 qemu_irq_raise(ch->parent->irq[ev_id]); 907 } 908 trace_pl330_dmasev_event(ev_id); 909 ch->parent->ev_status |= (1 << ev_id); 910 } 911 912 static void pl330_dmast(PL330Chan *ch, uint8_t opcode, uint8_t *args, int len) 913 { 914 uint8_t bs = opcode & 3; 915 uint32_t size, num; 916 bool inc; 917 918 if (bs == 2) { 919 pl330_fault(ch, PL330_FAULT_OPERAND_INVALID); 920 return; 921 } 922 if ((bs == 1 && ch->request_flag == PL330_BURST) || 923 (bs == 3 && ch->request_flag == PL330_SINGLE)) { 924 /* Perform NOP */ 925 return; 926 } 927 num = ((ch->control >> 18) & 0xf) + 1; 928 size = (uint32_t)1 << ((ch->control >> 15) & 0x7); 929 inc = !!((ch->control >> 14) & 1); 930 ch->stall = pl330_queue_put_insn(&ch->parent->write_queue, ch->dst, 931 size, num, inc, 0, ch->tag); 932 if (!ch->stall) { 933 trace_pl330_dmast(ch->tag, ch->dst, size, num, inc ? 'Y' : 'N'); 934 ch->dst += inc ? size * num - (ch->dst & (size - 1)) : 0; 935 } 936 } 937 938 static void pl330_dmastp(PL330Chan *ch, uint8_t opcode, 939 uint8_t *args, int len) 940 { 941 uint8_t periph_id; 942 943 if (args[0] & 7) { 944 pl330_fault(ch, PL330_FAULT_OPERAND_INVALID); 945 return; 946 } 947 periph_id = (args[0] >> 3) & 0x1f; 948 if (periph_id >= ch->parent->num_periph_req) { 949 pl330_fault(ch, PL330_FAULT_OPERAND_INVALID); 950 return; 951 } 952 if (ch->ns && !(ch->parent->cfg[CFG_PNS] & (1 << periph_id))) { 953 pl330_fault(ch, PL330_FAULT_CH_PERIPH_ERR); 954 return; 955 } 956 pl330_dmast(ch, opcode, args, len); 957 } 958 959 static void pl330_dmastz(PL330Chan *ch, uint8_t opcode, 960 uint8_t *args, int len) 961 { 962 uint32_t size, num; 963 bool inc; 964 965 num = ((ch->control >> 18) & 0xf) + 1; 966 size = (uint32_t)1 << ((ch->control >> 15) & 0x7); 967 inc = !!((ch->control >> 14) & 1); 968 ch->stall = pl330_queue_put_insn(&ch->parent->write_queue, ch->dst, 969 size, num, inc, 1, ch->tag); 970 if (inc) { 971 ch->dst += size * num; 972 } 973 } 974 975 static void pl330_dmawfe(PL330Chan *ch, uint8_t opcode, 976 uint8_t *args, int len) 977 { 978 uint8_t ev_id; 979 int i; 980 981 if (args[0] & 5) { 982 pl330_fault(ch, PL330_FAULT_OPERAND_INVALID); 983 return; 984 } 985 ev_id = (args[0] >> 3) & 0x1f; 986 if (ev_id >= ch->parent->num_events) { 987 pl330_fault(ch, PL330_FAULT_OPERAND_INVALID); 988 return; 989 } 990 if (ch->ns && !(ch->parent->cfg[CFG_INS] & (1 << ev_id))) { 991 pl330_fault(ch, PL330_FAULT_EVENT_ERR); 992 return; 993 } 994 ch->wakeup = ev_id; 995 ch->state = pl330_chan_waiting_event; 996 if (~ch->parent->inten & ch->parent->ev_status & 1 << ev_id) { 997 ch->state = pl330_chan_executing; 998 /* If anyone else is currently waiting on the same event, let them 999 * clear the ev_status so they pick up event as well 1000 */ 1001 for (i = 0; i < ch->parent->num_chnls; ++i) { 1002 PL330Chan *peer = &ch->parent->chan[i]; 1003 if (peer->state == pl330_chan_waiting_event && 1004 peer->wakeup == ev_id) { 1005 return; 1006 } 1007 } 1008 ch->parent->ev_status &= ~(1 << ev_id); 1009 trace_pl330_dmawfe(ev_id); 1010 } else { 1011 ch->stall = 1; 1012 } 1013 } 1014 1015 static void pl330_dmawfp(PL330Chan *ch, uint8_t opcode, 1016 uint8_t *args, int len) 1017 { 1018 uint8_t bs = opcode & 3; 1019 uint8_t periph_id; 1020 1021 if (args[0] & 7) { 1022 pl330_fault(ch, PL330_FAULT_OPERAND_INVALID); 1023 return; 1024 } 1025 periph_id = (args[0] >> 3) & 0x1f; 1026 if (periph_id >= ch->parent->num_periph_req) { 1027 pl330_fault(ch, PL330_FAULT_OPERAND_INVALID); 1028 return; 1029 } 1030 if (ch->ns && !(ch->parent->cfg[CFG_PNS] & (1 << periph_id))) { 1031 pl330_fault(ch, PL330_FAULT_CH_PERIPH_ERR); 1032 return; 1033 } 1034 switch (bs) { 1035 case 0: /* S */ 1036 ch->request_flag = PL330_SINGLE; 1037 ch->wfp_sbp = 0; 1038 break; 1039 case 1: /* P */ 1040 ch->request_flag = PL330_BURST; 1041 ch->wfp_sbp = 2; 1042 break; 1043 case 2: /* B */ 1044 ch->request_flag = PL330_BURST; 1045 ch->wfp_sbp = 1; 1046 break; 1047 default: 1048 pl330_fault(ch, PL330_FAULT_OPERAND_INVALID); 1049 return; 1050 } 1051 1052 if (ch->parent->periph_busy[periph_id]) { 1053 ch->state = pl330_chan_waiting_periph; 1054 ch->stall = 1; 1055 } else if (ch->state == pl330_chan_waiting_periph) { 1056 ch->state = pl330_chan_executing; 1057 } 1058 } 1059 1060 static void pl330_dmawmb(PL330Chan *ch, uint8_t opcode, 1061 uint8_t *args, int len) 1062 { 1063 if (pl330_queue_find_insn(&ch->parent->write_queue, ch->tag, false)) { 1064 ch->state = pl330_chan_at_barrier; 1065 ch->stall = 1; 1066 return; 1067 } else { 1068 ch->state = pl330_chan_executing; 1069 } 1070 } 1071 1072 /* NULL terminated array of the instruction descriptions. */ 1073 static const PL330InsnDesc insn_desc[] = { 1074 { .opcode = 0x54, .opmask = 0xFD, .size = 3, .exec = pl330_dmaaddh, }, 1075 { .opcode = 0x5c, .opmask = 0xFD, .size = 3, .exec = pl330_dmaadnh, }, 1076 { .opcode = 0x00, .opmask = 0xFF, .size = 1, .exec = pl330_dmaend, }, 1077 { .opcode = 0x35, .opmask = 0xFF, .size = 2, .exec = pl330_dmaflushp, }, 1078 { .opcode = 0xA0, .opmask = 0xFD, .size = 6, .exec = pl330_dmago, }, 1079 { .opcode = 0x04, .opmask = 0xFC, .size = 1, .exec = pl330_dmald, }, 1080 { .opcode = 0x25, .opmask = 0xFD, .size = 2, .exec = pl330_dmaldp, }, 1081 { .opcode = 0x20, .opmask = 0xFD, .size = 2, .exec = pl330_dmalp, }, 1082 /* dmastp must be before dmalpend in this list, because their maps 1083 * are overlapping 1084 */ 1085 { .opcode = 0x29, .opmask = 0xFD, .size = 2, .exec = pl330_dmastp, }, 1086 { .opcode = 0x28, .opmask = 0xE8, .size = 2, .exec = pl330_dmalpend, }, 1087 { .opcode = 0x01, .opmask = 0xFF, .size = 1, .exec = pl330_dmakill, }, 1088 { .opcode = 0xBC, .opmask = 0xFF, .size = 6, .exec = pl330_dmamov, }, 1089 { .opcode = 0x18, .opmask = 0xFF, .size = 1, .exec = pl330_dmanop, }, 1090 { .opcode = 0x12, .opmask = 0xFF, .size = 1, .exec = pl330_dmarmb, }, 1091 { .opcode = 0x34, .opmask = 0xFF, .size = 2, .exec = pl330_dmasev, }, 1092 { .opcode = 0x08, .opmask = 0xFC, .size = 1, .exec = pl330_dmast, }, 1093 { .opcode = 0x0C, .opmask = 0xFF, .size = 1, .exec = pl330_dmastz, }, 1094 { .opcode = 0x36, .opmask = 0xFF, .size = 2, .exec = pl330_dmawfe, }, 1095 { .opcode = 0x30, .opmask = 0xFC, .size = 2, .exec = pl330_dmawfp, }, 1096 { .opcode = 0x13, .opmask = 0xFF, .size = 1, .exec = pl330_dmawmb, }, 1097 { .opcode = 0x00, .opmask = 0x00, .size = 0, .exec = NULL, } 1098 }; 1099 1100 /* Instructions which can be issued via debug registers. */ 1101 static const PL330InsnDesc debug_insn_desc[] = { 1102 { .opcode = 0xA0, .opmask = 0xFD, .size = 6, .exec = pl330_dmago, }, 1103 { .opcode = 0x01, .opmask = 0xFF, .size = 1, .exec = pl330_dmakill, }, 1104 { .opcode = 0x34, .opmask = 0xFF, .size = 2, .exec = pl330_dmasev, }, 1105 { .opcode = 0x00, .opmask = 0x00, .size = 0, .exec = NULL, } 1106 }; 1107 1108 static inline const PL330InsnDesc *pl330_fetch_insn(PL330Chan *ch) 1109 { 1110 uint8_t opcode; 1111 int i; 1112 1113 dma_memory_read(ch->parent->mem_as, ch->pc, &opcode, 1, 1114 MEMTXATTRS_UNSPECIFIED); 1115 for (i = 0; insn_desc[i].size; i++) { 1116 if ((opcode & insn_desc[i].opmask) == insn_desc[i].opcode) { 1117 return &insn_desc[i]; 1118 } 1119 } 1120 return NULL; 1121 } 1122 1123 static inline void pl330_exec_insn(PL330Chan *ch, const PL330InsnDesc *insn) 1124 { 1125 uint8_t buf[PL330_INSN_MAXSIZE]; 1126 1127 assert(insn->size <= PL330_INSN_MAXSIZE); 1128 dma_memory_read(ch->parent->mem_as, ch->pc, buf, insn->size, 1129 MEMTXATTRS_UNSPECIFIED); 1130 insn->exec(ch, buf[0], &buf[1], insn->size - 1); 1131 } 1132 1133 static inline void pl330_update_pc(PL330Chan *ch, 1134 const PL330InsnDesc *insn) 1135 { 1136 ch->pc += insn->size; 1137 } 1138 1139 /* Try to execute current instruction in channel CH. Number of executed 1140 instructions is returned (0 or 1). */ 1141 static int pl330_chan_exec(PL330Chan *ch) 1142 { 1143 const PL330InsnDesc *insn; 1144 1145 if (ch->state != pl330_chan_executing && 1146 ch->state != pl330_chan_waiting_periph && 1147 ch->state != pl330_chan_at_barrier && 1148 ch->state != pl330_chan_waiting_event) { 1149 return 0; 1150 } 1151 ch->stall = 0; 1152 insn = pl330_fetch_insn(ch); 1153 if (!insn) { 1154 trace_pl330_chan_exec_undef(); 1155 pl330_fault(ch, PL330_FAULT_UNDEF_INSTR); 1156 return 0; 1157 } 1158 pl330_exec_insn(ch, insn); 1159 if (!ch->stall) { 1160 pl330_update_pc(ch, insn); 1161 ch->watchdog_timer = 0; 1162 return 1; 1163 /* WDT only active in exec state */ 1164 } else if (ch->state == pl330_chan_executing) { 1165 ch->watchdog_timer++; 1166 if (ch->watchdog_timer >= PL330_WATCHDOG_LIMIT) { 1167 pl330_fault(ch, PL330_FAULT_LOCKUP_ERR); 1168 } 1169 } 1170 return 0; 1171 } 1172 1173 /* Try to execute 1 instruction in each channel, one instruction from read 1174 queue and one instruction from write queue. Number of successfully executed 1175 instructions is returned. */ 1176 static int pl330_exec_cycle(PL330Chan *channel) 1177 { 1178 PL330State *s = channel->parent; 1179 PL330QueueEntry *q; 1180 int i; 1181 int num_exec = 0; 1182 int fifo_res = 0; 1183 uint8_t buf[PL330_MAX_BURST_LEN]; 1184 1185 /* Execute one instruction in each channel */ 1186 num_exec += pl330_chan_exec(channel); 1187 1188 /* Execute one instruction from read queue */ 1189 q = pl330_queue_find_insn(&s->read_queue, PL330_UNTAGGED, true); 1190 if (q != NULL && q->len <= pl330_fifo_num_free(&s->fifo)) { 1191 int len = q->len - (q->addr & (q->len - 1)); 1192 1193 dma_memory_read(s->mem_as, q->addr, buf, len, 1194 MEMTXATTRS_UNSPECIFIED); 1195 trace_pl330_exec_cycle(q->addr, len); 1196 if (trace_event_get_state_backends(TRACE_PL330_HEXDUMP)) { 1197 pl330_hexdump(buf, len); 1198 } 1199 fifo_res = pl330_fifo_push(&s->fifo, buf, len, q->tag); 1200 if (fifo_res == PL330_FIFO_OK) { 1201 if (q->inc) { 1202 q->addr += len; 1203 } 1204 q->n--; 1205 if (!q->n) { 1206 pl330_queue_remove_insn(&s->read_queue, q); 1207 } 1208 num_exec++; 1209 } 1210 } 1211 1212 /* Execute one instruction from write queue. */ 1213 q = pl330_queue_find_insn(&s->write_queue, pl330_fifo_tag(&s->fifo), true); 1214 if (q != NULL) { 1215 int len = q->len - (q->addr & (q->len - 1)); 1216 1217 if (q->z) { 1218 for (i = 0; i < len; i++) { 1219 buf[i] = 0; 1220 } 1221 } else { 1222 fifo_res = pl330_fifo_get(&s->fifo, buf, len, q->tag); 1223 } 1224 if (fifo_res == PL330_FIFO_OK || q->z) { 1225 dma_memory_write(s->mem_as, q->addr, buf, len, 1226 MEMTXATTRS_UNSPECIFIED); 1227 trace_pl330_exec_cycle(q->addr, len); 1228 if (trace_event_get_state_backends(TRACE_PL330_HEXDUMP)) { 1229 pl330_hexdump(buf, len); 1230 } 1231 if (q->inc) { 1232 q->addr += len; 1233 } 1234 num_exec++; 1235 } else if (fifo_res == PL330_FIFO_STALL) { 1236 pl330_fault(&channel->parent->chan[q->tag], 1237 PL330_FAULT_FIFOEMPTY_ERR); 1238 } 1239 q->n--; 1240 if (!q->n) { 1241 pl330_queue_remove_insn(&s->write_queue, q); 1242 } 1243 } 1244 1245 return num_exec; 1246 } 1247 1248 static int pl330_exec_channel(PL330Chan *channel) 1249 { 1250 int insr_exec = 0; 1251 1252 /* TODO: Is it all right to execute everything or should we do per-cycle 1253 simulation? */ 1254 while (pl330_exec_cycle(channel)) { 1255 insr_exec++; 1256 } 1257 1258 /* Detect deadlock */ 1259 if (channel->state == pl330_chan_executing) { 1260 pl330_fault(channel, PL330_FAULT_LOCKUP_ERR); 1261 } 1262 /* Situation when one of the queues has deadlocked but all channels 1263 * have finished their programs should be impossible. 1264 */ 1265 1266 return insr_exec; 1267 } 1268 1269 static inline void pl330_exec(PL330State *s) 1270 { 1271 int i, insr_exec; 1272 trace_pl330_exec(); 1273 do { 1274 insr_exec = pl330_exec_channel(&s->manager); 1275 1276 for (i = 0; i < s->num_chnls; i++) { 1277 insr_exec += pl330_exec_channel(&s->chan[i]); 1278 } 1279 } while (insr_exec); 1280 } 1281 1282 static void pl330_exec_cycle_timer(void *opaque) 1283 { 1284 PL330State *s = (PL330State *)opaque; 1285 pl330_exec(s); 1286 } 1287 1288 /* Stop or restore dma operations */ 1289 1290 static void pl330_dma_stop_irq(void *opaque, int irq, int level) 1291 { 1292 PL330State *s = (PL330State *)opaque; 1293 1294 if (s->periph_busy[irq] != level) { 1295 s->periph_busy[irq] = level; 1296 timer_mod(s->timer, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL)); 1297 } 1298 } 1299 1300 static void pl330_debug_exec(PL330State *s) 1301 { 1302 uint8_t args[5]; 1303 uint8_t opcode; 1304 uint8_t chan_id; 1305 int i; 1306 PL330Chan *ch; 1307 const PL330InsnDesc *insn; 1308 1309 s->debug_status = 1; 1310 chan_id = (s->dbg[0] >> 8) & 0x07; 1311 opcode = (s->dbg[0] >> 16) & 0xff; 1312 args[0] = (s->dbg[0] >> 24) & 0xff; 1313 args[1] = (s->dbg[1] >> 0) & 0xff; 1314 args[2] = (s->dbg[1] >> 8) & 0xff; 1315 args[3] = (s->dbg[1] >> 16) & 0xff; 1316 args[4] = (s->dbg[1] >> 24) & 0xff; 1317 trace_pl330_debug_exec(chan_id); 1318 if (s->dbg[0] & 1) { 1319 ch = &s->chan[chan_id]; 1320 } else { 1321 ch = &s->manager; 1322 } 1323 insn = NULL; 1324 for (i = 0; debug_insn_desc[i].size; i++) { 1325 if ((opcode & debug_insn_desc[i].opmask) == debug_insn_desc[i].opcode) { 1326 insn = &debug_insn_desc[i]; 1327 } 1328 } 1329 if (!insn) { 1330 pl330_fault(ch, PL330_FAULT_UNDEF_INSTR | PL330_FAULT_DBG_INSTR); 1331 return; 1332 } 1333 ch->stall = 0; 1334 insn->exec(ch, opcode, args, insn->size - 1); 1335 if (ch->fault_type) { 1336 ch->fault_type |= PL330_FAULT_DBG_INSTR; 1337 } 1338 if (ch->stall) { 1339 trace_pl330_debug_exec_stall(); 1340 qemu_log_mask(LOG_UNIMP, "pl330: stall of debug instruction not " 1341 "implemented\n"); 1342 } 1343 s->debug_status = 0; 1344 } 1345 1346 /* IOMEM mapped registers */ 1347 1348 static void pl330_iomem_write(void *opaque, hwaddr offset, 1349 uint64_t value, unsigned size) 1350 { 1351 PL330State *s = (PL330State *) opaque; 1352 int i; 1353 1354 trace_pl330_iomem_write((unsigned)offset, (unsigned)value); 1355 1356 switch (offset) { 1357 case PL330_REG_INTEN: 1358 s->inten = value; 1359 break; 1360 case PL330_REG_INTCLR: 1361 for (i = 0; i < s->num_events; i++) { 1362 if (s->int_status & s->inten & value & (1 << i)) { 1363 trace_pl330_iomem_write_clr(i); 1364 qemu_irq_lower(s->irq[i]); 1365 } 1366 } 1367 s->ev_status &= ~(value & s->inten); 1368 s->int_status &= ~(value & s->inten); 1369 break; 1370 case PL330_REG_DBGCMD: 1371 if ((value & 3) == 0) { 1372 pl330_debug_exec(s); 1373 pl330_exec(s); 1374 } else { 1375 qemu_log_mask(LOG_GUEST_ERROR, "pl330: write of illegal value %u " 1376 "for offset " HWADDR_FMT_plx "\n", (unsigned)value, 1377 offset); 1378 } 1379 break; 1380 case PL330_REG_DBGINST0: 1381 s->dbg[0] = value; 1382 break; 1383 case PL330_REG_DBGINST1: 1384 s->dbg[1] = value; 1385 break; 1386 default: 1387 qemu_log_mask(LOG_GUEST_ERROR, "pl330: bad write offset " HWADDR_FMT_plx 1388 "\n", offset); 1389 break; 1390 } 1391 } 1392 1393 static inline uint32_t pl330_iomem_read_imp(void *opaque, 1394 hwaddr offset) 1395 { 1396 PL330State *s = (PL330State *)opaque; 1397 int chan_id; 1398 int i; 1399 uint32_t res; 1400 1401 if (offset >= PL330_REG_PERIPH_ID && offset < PL330_REG_PERIPH_ID + 32) { 1402 return pl330_id[(offset - PL330_REG_PERIPH_ID) >> 2]; 1403 } 1404 if (offset >= PL330_REG_CR0_BASE && offset < PL330_REG_CR0_BASE + 24) { 1405 return s->cfg[(offset - PL330_REG_CR0_BASE) >> 2]; 1406 } 1407 if (offset >= PL330_REG_CHANCTRL && offset < PL330_REG_DBGSTATUS) { 1408 offset -= PL330_REG_CHANCTRL; 1409 chan_id = offset >> 5; 1410 if (chan_id >= s->num_chnls) { 1411 qemu_log_mask(LOG_GUEST_ERROR, "pl330: bad read offset " 1412 HWADDR_FMT_plx "\n", offset); 1413 return 0; 1414 } 1415 switch (offset & 0x1f) { 1416 case 0x00: 1417 return s->chan[chan_id].src; 1418 case 0x04: 1419 return s->chan[chan_id].dst; 1420 case 0x08: 1421 return s->chan[chan_id].control; 1422 case 0x0C: 1423 return s->chan[chan_id].lc[0]; 1424 case 0x10: 1425 return s->chan[chan_id].lc[1]; 1426 default: 1427 qemu_log_mask(LOG_GUEST_ERROR, "pl330: bad read offset " 1428 HWADDR_FMT_plx "\n", offset); 1429 return 0; 1430 } 1431 } 1432 if (offset >= PL330_REG_CSR_BASE && offset < 0x400) { 1433 offset -= PL330_REG_CSR_BASE; 1434 chan_id = offset >> 3; 1435 if (chan_id >= s->num_chnls) { 1436 qemu_log_mask(LOG_GUEST_ERROR, "pl330: bad read offset " 1437 HWADDR_FMT_plx "\n", offset); 1438 return 0; 1439 } 1440 switch ((offset >> 2) & 1) { 1441 case 0x0: 1442 res = (s->chan[chan_id].ns << 21) | 1443 (s->chan[chan_id].wakeup << 4) | 1444 (s->chan[chan_id].state) | 1445 (s->chan[chan_id].wfp_sbp << 14); 1446 return res; 1447 case 0x1: 1448 return s->chan[chan_id].pc; 1449 default: 1450 qemu_log_mask(LOG_GUEST_ERROR, "pl330: read error\n"); 1451 return 0; 1452 } 1453 } 1454 if (offset >= PL330_REG_FTR_BASE && offset < 0x100) { 1455 offset -= PL330_REG_FTR_BASE; 1456 chan_id = offset >> 2; 1457 if (chan_id >= s->num_chnls) { 1458 qemu_log_mask(LOG_GUEST_ERROR, "pl330: bad read offset " 1459 HWADDR_FMT_plx "\n", offset); 1460 return 0; 1461 } 1462 return s->chan[chan_id].fault_type; 1463 } 1464 switch (offset) { 1465 case PL330_REG_DSR: 1466 return (s->manager.ns << 9) | (s->manager.wakeup << 4) | 1467 (s->manager.state & 0xf); 1468 case PL330_REG_DPC: 1469 return s->manager.pc; 1470 case PL330_REG_INTEN: 1471 return s->inten; 1472 case PL330_REG_INT_EVENT_RIS: 1473 return s->ev_status; 1474 case PL330_REG_INTMIS: 1475 return s->int_status; 1476 case PL330_REG_INTCLR: 1477 /* Documentation says that we can't read this register 1478 * but linux kernel does it 1479 */ 1480 return 0; 1481 case PL330_REG_FSRD: 1482 return s->manager.state ? 1 : 0; 1483 case PL330_REG_FSRC: 1484 res = 0; 1485 for (i = 0; i < s->num_chnls; i++) { 1486 if (s->chan[i].state == pl330_chan_fault || 1487 s->chan[i].state == pl330_chan_fault_completing) { 1488 res |= 1 << i; 1489 } 1490 } 1491 return res; 1492 case PL330_REG_FTRD: 1493 return s->manager.fault_type; 1494 case PL330_REG_DBGSTATUS: 1495 return s->debug_status; 1496 default: 1497 qemu_log_mask(LOG_GUEST_ERROR, "pl330: bad read offset " 1498 HWADDR_FMT_plx "\n", offset); 1499 } 1500 return 0; 1501 } 1502 1503 static uint64_t pl330_iomem_read(void *opaque, hwaddr offset, 1504 unsigned size) 1505 { 1506 uint32_t ret = pl330_iomem_read_imp(opaque, offset); 1507 trace_pl330_iomem_read((uint32_t)offset, ret); 1508 return ret; 1509 } 1510 1511 static const MemoryRegionOps pl330_ops = { 1512 .read = pl330_iomem_read, 1513 .write = pl330_iomem_write, 1514 .endianness = DEVICE_NATIVE_ENDIAN, 1515 .impl = { 1516 .min_access_size = 4, 1517 .max_access_size = 4, 1518 } 1519 }; 1520 1521 /* Controller logic and initialization */ 1522 1523 static void pl330_chan_reset(PL330Chan *ch) 1524 { 1525 ch->src = 0; 1526 ch->dst = 0; 1527 ch->pc = 0; 1528 ch->state = pl330_chan_stopped; 1529 ch->watchdog_timer = 0; 1530 ch->stall = 0; 1531 ch->control = 0; 1532 ch->status = 0; 1533 ch->fault_type = 0; 1534 } 1535 1536 static void pl330_reset(DeviceState *d) 1537 { 1538 int i; 1539 PL330State *s = PL330(d); 1540 1541 s->inten = 0; 1542 s->int_status = 0; 1543 s->ev_status = 0; 1544 s->debug_status = 0; 1545 s->num_faulting = 0; 1546 s->manager.ns = s->mgr_ns_at_rst; 1547 pl330_fifo_reset(&s->fifo); 1548 pl330_queue_reset(&s->read_queue); 1549 pl330_queue_reset(&s->write_queue); 1550 1551 for (i = 0; i < s->num_chnls; i++) { 1552 pl330_chan_reset(&s->chan[i]); 1553 } 1554 for (i = 0; i < s->num_periph_req; i++) { 1555 s->periph_busy[i] = 0; 1556 } 1557 1558 timer_del(s->timer); 1559 } 1560 1561 static void pl330_realize(DeviceState *dev, Error **errp) 1562 { 1563 int i; 1564 PL330State *s = PL330(dev); 1565 1566 sysbus_init_irq(SYS_BUS_DEVICE(dev), &s->irq_abort); 1567 memory_region_init_io(&s->iomem, OBJECT(s), &pl330_ops, s, 1568 "dma", PL330_IOMEM_SIZE); 1569 sysbus_init_mmio(SYS_BUS_DEVICE(dev), &s->iomem); 1570 1571 if (!s->mem_mr) { 1572 error_setg(errp, "'memory' link is not set"); 1573 return; 1574 } else if (s->mem_mr == get_system_memory()) { 1575 /* Avoid creating new AS for system memory. */ 1576 s->mem_as = &address_space_memory; 1577 } else { 1578 s->mem_as = g_new0(AddressSpace, 1); 1579 address_space_init(s->mem_as, s->mem_mr, 1580 memory_region_name(s->mem_mr)); 1581 } 1582 1583 s->timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, pl330_exec_cycle_timer, s); 1584 1585 s->cfg[0] = (s->mgr_ns_at_rst ? 0x4 : 0) | 1586 (s->num_periph_req > 0 ? 1 : 0) | 1587 ((s->num_chnls - 1) & 0x7) << 4 | 1588 ((s->num_periph_req - 1) & 0x1f) << 12 | 1589 ((s->num_events - 1) & 0x1f) << 17; 1590 1591 switch (s->i_cache_len) { 1592 case (4): 1593 s->cfg[1] |= 2; 1594 break; 1595 case (8): 1596 s->cfg[1] |= 3; 1597 break; 1598 case (16): 1599 s->cfg[1] |= 4; 1600 break; 1601 case (32): 1602 s->cfg[1] |= 5; 1603 break; 1604 default: 1605 error_setg(errp, "Bad value for i-cache_len property: %" PRIx8, 1606 s->i_cache_len); 1607 return; 1608 } 1609 s->cfg[1] |= ((s->num_i_cache_lines - 1) & 0xf) << 4; 1610 1611 s->chan = g_new0(PL330Chan, s->num_chnls); 1612 s->hi_seqn = g_new0(uint8_t, s->num_chnls); 1613 s->lo_seqn = g_new0(uint8_t, s->num_chnls); 1614 for (i = 0; i < s->num_chnls; i++) { 1615 s->chan[i].parent = s; 1616 s->chan[i].tag = (uint8_t)i; 1617 } 1618 s->manager.parent = s; 1619 s->manager.tag = s->num_chnls; 1620 s->manager.is_manager = true; 1621 1622 s->irq = g_new0(qemu_irq, s->num_events); 1623 for (i = 0; i < s->num_events; i++) { 1624 sysbus_init_irq(SYS_BUS_DEVICE(dev), &s->irq[i]); 1625 } 1626 1627 qdev_init_gpio_in(dev, pl330_dma_stop_irq, PL330_PERIPH_NUM); 1628 1629 switch (s->data_width) { 1630 case (32): 1631 s->cfg[CFG_CRD] |= 0x2; 1632 break; 1633 case (64): 1634 s->cfg[CFG_CRD] |= 0x3; 1635 break; 1636 case (128): 1637 s->cfg[CFG_CRD] |= 0x4; 1638 break; 1639 default: 1640 error_setg(errp, "Bad value for data_width property: %" PRIx8, 1641 s->data_width); 1642 return; 1643 } 1644 1645 s->cfg[CFG_CRD] |= ((s->wr_cap - 1) & 0x7) << 4 | 1646 ((s->wr_q_dep - 1) & 0xf) << 8 | 1647 ((s->rd_cap - 1) & 0x7) << 12 | 1648 ((s->rd_q_dep - 1) & 0xf) << 16 | 1649 ((s->data_buffer_dep - 1) & 0x1ff) << 20; 1650 1651 pl330_queue_init(&s->read_queue, s->rd_q_dep, s); 1652 pl330_queue_init(&s->write_queue, s->wr_q_dep, s); 1653 pl330_fifo_init(&s->fifo, s->data_width / 4 * s->data_buffer_dep); 1654 } 1655 1656 static Property pl330_properties[] = { 1657 /* CR0 */ 1658 DEFINE_PROP_UINT32("num_chnls", PL330State, num_chnls, 8), 1659 DEFINE_PROP_UINT8("num_periph_req", PL330State, num_periph_req, 4), 1660 DEFINE_PROP_UINT8("num_events", PL330State, num_events, 16), 1661 DEFINE_PROP_UINT8("mgr_ns_at_rst", PL330State, mgr_ns_at_rst, 0), 1662 /* CR1 */ 1663 DEFINE_PROP_UINT8("i-cache_len", PL330State, i_cache_len, 4), 1664 DEFINE_PROP_UINT8("num_i-cache_lines", PL330State, num_i_cache_lines, 8), 1665 /* CR2-4 */ 1666 DEFINE_PROP_UINT32("boot_addr", PL330State, cfg[CFG_BOOT_ADDR], 0), 1667 DEFINE_PROP_UINT32("INS", PL330State, cfg[CFG_INS], 0), 1668 DEFINE_PROP_UINT32("PNS", PL330State, cfg[CFG_PNS], 0), 1669 /* CRD */ 1670 DEFINE_PROP_UINT8("data_width", PL330State, data_width, 64), 1671 DEFINE_PROP_UINT8("wr_cap", PL330State, wr_cap, 8), 1672 DEFINE_PROP_UINT8("wr_q_dep", PL330State, wr_q_dep, 16), 1673 DEFINE_PROP_UINT8("rd_cap", PL330State, rd_cap, 8), 1674 DEFINE_PROP_UINT8("rd_q_dep", PL330State, rd_q_dep, 16), 1675 DEFINE_PROP_UINT16("data_buffer_dep", PL330State, data_buffer_dep, 256), 1676 1677 DEFINE_PROP_LINK("memory", PL330State, mem_mr, 1678 TYPE_MEMORY_REGION, MemoryRegion *), 1679 1680 DEFINE_PROP_END_OF_LIST(), 1681 }; 1682 1683 static void pl330_class_init(ObjectClass *klass, void *data) 1684 { 1685 DeviceClass *dc = DEVICE_CLASS(klass); 1686 1687 dc->realize = pl330_realize; 1688 dc->reset = pl330_reset; 1689 device_class_set_props(dc, pl330_properties); 1690 dc->vmsd = &vmstate_pl330; 1691 } 1692 1693 static const TypeInfo pl330_type_info = { 1694 .name = TYPE_PL330, 1695 .parent = TYPE_SYS_BUS_DEVICE, 1696 .instance_size = sizeof(PL330State), 1697 .class_init = pl330_class_init, 1698 }; 1699 1700 static void pl330_register_types(void) 1701 { 1702 type_register_static(&pl330_type_info); 1703 } 1704 1705 type_init(pl330_register_types) 1706