1 /* 2 * OpenPIC emulation 3 * 4 * Copyright (c) 2004 Jocelyn Mayer 5 * 2011 Alexander Graf 6 * 7 * Permission is hereby granted, free of charge, to any person obtaining a copy 8 * of this software and associated documentation files (the "Software"), to deal 9 * in the Software without restriction, including without limitation the rights 10 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 11 * copies of the Software, and to permit persons to whom the Software is 12 * furnished to do so, subject to the following conditions: 13 * 14 * The above copyright notice and this permission notice shall be included in 15 * all copies or substantial portions of the Software. 16 * 17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 23 * THE SOFTWARE. 24 */ 25 /* 26 * 27 * Based on OpenPic implementations: 28 * - Intel GW80314 I/O companion chip developer's manual 29 * - Motorola MPC8245 & MPC8540 user manuals. 30 * - Motorola MCP750 (aka Raven) programmer manual. 31 * - Motorola Harrier programmer manuel 32 * 33 * Serial interrupts, as implemented in Raven chipset are not supported yet. 34 * 35 */ 36 #include "hw/hw.h" 37 #include "hw/ppc/mac.h" 38 #include "hw/pci/pci.h" 39 #include "hw/ppc/openpic.h" 40 #include "hw/ppc/ppc_e500.h" 41 #include "hw/sysbus.h" 42 #include "hw/pci/msi.h" 43 #include "qemu/bitops.h" 44 #include "qapi/qmp/qerror.h" 45 46 //#define DEBUG_OPENPIC 47 48 #ifdef DEBUG_OPENPIC 49 static const int debug_openpic = 1; 50 #else 51 static const int debug_openpic = 0; 52 #endif 53 54 #define DPRINTF(fmt, ...) do { \ 55 if (debug_openpic) { \ 56 printf(fmt , ## __VA_ARGS__); \ 57 } \ 58 } while (0) 59 60 #define MAX_CPU 32 61 #define MAX_MSI 8 62 #define VID 0x03 /* MPIC version ID */ 63 64 /* OpenPIC capability flags */ 65 #define OPENPIC_FLAG_IDR_CRIT (1 << 0) 66 #define OPENPIC_FLAG_ILR (2 << 0) 67 68 /* OpenPIC address map */ 69 #define OPENPIC_GLB_REG_START 0x0 70 #define OPENPIC_GLB_REG_SIZE 0x10F0 71 #define OPENPIC_TMR_REG_START 0x10F0 72 #define OPENPIC_TMR_REG_SIZE 0x220 73 #define OPENPIC_MSI_REG_START 0x1600 74 #define OPENPIC_MSI_REG_SIZE 0x200 75 #define OPENPIC_SUMMARY_REG_START 0x3800 76 #define OPENPIC_SUMMARY_REG_SIZE 0x800 77 #define OPENPIC_SRC_REG_START 0x10000 78 #define OPENPIC_SRC_REG_SIZE (OPENPIC_MAX_SRC * 0x20) 79 #define OPENPIC_CPU_REG_START 0x20000 80 #define OPENPIC_CPU_REG_SIZE 0x100 + ((MAX_CPU - 1) * 0x1000) 81 82 /* Raven */ 83 #define RAVEN_MAX_CPU 2 84 #define RAVEN_MAX_EXT 48 85 #define RAVEN_MAX_IRQ 64 86 #define RAVEN_MAX_TMR OPENPIC_MAX_TMR 87 #define RAVEN_MAX_IPI OPENPIC_MAX_IPI 88 89 /* Interrupt definitions */ 90 #define RAVEN_FE_IRQ (RAVEN_MAX_EXT) /* Internal functional IRQ */ 91 #define RAVEN_ERR_IRQ (RAVEN_MAX_EXT + 1) /* Error IRQ */ 92 #define RAVEN_TMR_IRQ (RAVEN_MAX_EXT + 2) /* First timer IRQ */ 93 #define RAVEN_IPI_IRQ (RAVEN_TMR_IRQ + RAVEN_MAX_TMR) /* First IPI IRQ */ 94 /* First doorbell IRQ */ 95 #define RAVEN_DBL_IRQ (RAVEN_IPI_IRQ + (RAVEN_MAX_CPU * RAVEN_MAX_IPI)) 96 97 typedef struct FslMpicInfo { 98 int max_ext; 99 } FslMpicInfo; 100 101 static FslMpicInfo fsl_mpic_20 = { 102 .max_ext = 12, 103 }; 104 105 static FslMpicInfo fsl_mpic_42 = { 106 .max_ext = 12, 107 }; 108 109 #define FRR_NIRQ_SHIFT 16 110 #define FRR_NCPU_SHIFT 8 111 #define FRR_VID_SHIFT 0 112 113 #define VID_REVISION_1_2 2 114 #define VID_REVISION_1_3 3 115 116 #define VIR_GENERIC 0x00000000 /* Generic Vendor ID */ 117 118 #define GCR_RESET 0x80000000 119 #define GCR_MODE_PASS 0x00000000 120 #define GCR_MODE_MIXED 0x20000000 121 #define GCR_MODE_PROXY 0x60000000 122 123 #define TBCR_CI 0x80000000 /* count inhibit */ 124 #define TCCR_TOG 0x80000000 /* toggles when decrement to zero */ 125 126 #define IDR_EP_SHIFT 31 127 #define IDR_EP_MASK (1U << IDR_EP_SHIFT) 128 #define IDR_CI0_SHIFT 30 129 #define IDR_CI1_SHIFT 29 130 #define IDR_P1_SHIFT 1 131 #define IDR_P0_SHIFT 0 132 133 #define ILR_INTTGT_MASK 0x000000ff 134 #define ILR_INTTGT_INT 0x00 135 #define ILR_INTTGT_CINT 0x01 /* critical */ 136 #define ILR_INTTGT_MCP 0x02 /* machine check */ 137 138 /* The currently supported INTTGT values happen to be the same as QEMU's 139 * openpic output codes, but don't depend on this. The output codes 140 * could change (unlikely, but...) or support could be added for 141 * more INTTGT values. 142 */ 143 static const int inttgt_output[][2] = { 144 { ILR_INTTGT_INT, OPENPIC_OUTPUT_INT }, 145 { ILR_INTTGT_CINT, OPENPIC_OUTPUT_CINT }, 146 { ILR_INTTGT_MCP, OPENPIC_OUTPUT_MCK }, 147 }; 148 149 static int inttgt_to_output(int inttgt) 150 { 151 int i; 152 153 for (i = 0; i < ARRAY_SIZE(inttgt_output); i++) { 154 if (inttgt_output[i][0] == inttgt) { 155 return inttgt_output[i][1]; 156 } 157 } 158 159 fprintf(stderr, "%s: unsupported inttgt %d\n", __func__, inttgt); 160 return OPENPIC_OUTPUT_INT; 161 } 162 163 static int output_to_inttgt(int output) 164 { 165 int i; 166 167 for (i = 0; i < ARRAY_SIZE(inttgt_output); i++) { 168 if (inttgt_output[i][1] == output) { 169 return inttgt_output[i][0]; 170 } 171 } 172 173 abort(); 174 } 175 176 #define MSIIR_OFFSET 0x140 177 #define MSIIR_SRS_SHIFT 29 178 #define MSIIR_SRS_MASK (0x7 << MSIIR_SRS_SHIFT) 179 #define MSIIR_IBS_SHIFT 24 180 #define MSIIR_IBS_MASK (0x1f << MSIIR_IBS_SHIFT) 181 182 static int get_current_cpu(void) 183 { 184 if (!current_cpu) { 185 return -1; 186 } 187 188 return current_cpu->cpu_index; 189 } 190 191 static uint32_t openpic_cpu_read_internal(void *opaque, hwaddr addr, 192 int idx); 193 static void openpic_cpu_write_internal(void *opaque, hwaddr addr, 194 uint32_t val, int idx); 195 static void openpic_reset(DeviceState *d); 196 197 typedef enum IRQType { 198 IRQ_TYPE_NORMAL = 0, 199 IRQ_TYPE_FSLINT, /* FSL internal interrupt -- level only */ 200 IRQ_TYPE_FSLSPECIAL, /* FSL timer/IPI interrupt, edge, no polarity */ 201 } IRQType; 202 203 /* Round up to the nearest 64 IRQs so that the queue length 204 * won't change when moving between 32 and 64 bit hosts. 205 */ 206 #define IRQQUEUE_SIZE_BITS ((OPENPIC_MAX_IRQ + 63) & ~63) 207 208 typedef struct IRQQueue { 209 unsigned long *queue; 210 int32_t queue_size; /* Only used for VMSTATE_BITMAP */ 211 int next; 212 int priority; 213 } IRQQueue; 214 215 typedef struct IRQSource { 216 uint32_t ivpr; /* IRQ vector/priority register */ 217 uint32_t idr; /* IRQ destination register */ 218 uint32_t destmask; /* bitmap of CPU destinations */ 219 int last_cpu; 220 int output; /* IRQ level, e.g. OPENPIC_OUTPUT_INT */ 221 int pending; /* TRUE if IRQ is pending */ 222 IRQType type; 223 bool level:1; /* level-triggered */ 224 bool nomask:1; /* critical interrupts ignore mask on some FSL MPICs */ 225 } IRQSource; 226 227 #define IVPR_MASK_SHIFT 31 228 #define IVPR_MASK_MASK (1U << IVPR_MASK_SHIFT) 229 #define IVPR_ACTIVITY_SHIFT 30 230 #define IVPR_ACTIVITY_MASK (1U << IVPR_ACTIVITY_SHIFT) 231 #define IVPR_MODE_SHIFT 29 232 #define IVPR_MODE_MASK (1U << IVPR_MODE_SHIFT) 233 #define IVPR_POLARITY_SHIFT 23 234 #define IVPR_POLARITY_MASK (1U << IVPR_POLARITY_SHIFT) 235 #define IVPR_SENSE_SHIFT 22 236 #define IVPR_SENSE_MASK (1U << IVPR_SENSE_SHIFT) 237 238 #define IVPR_PRIORITY_MASK (0xFU << 16) 239 #define IVPR_PRIORITY(_ivprr_) ((int)(((_ivprr_) & IVPR_PRIORITY_MASK) >> 16)) 240 #define IVPR_VECTOR(opp, _ivprr_) ((_ivprr_) & (opp)->vector_mask) 241 242 /* IDR[EP/CI] are only for FSL MPIC prior to v4.0 */ 243 #define IDR_EP 0x80000000 /* external pin */ 244 #define IDR_CI 0x40000000 /* critical interrupt */ 245 246 typedef struct OpenPICTimer { 247 uint32_t tccr; /* Global timer current count register */ 248 uint32_t tbcr; /* Global timer base count register */ 249 } OpenPICTimer; 250 251 typedef struct OpenPICMSI { 252 uint32_t msir; /* Shared Message Signaled Interrupt Register */ 253 } OpenPICMSI; 254 255 typedef struct IRQDest { 256 int32_t ctpr; /* CPU current task priority */ 257 IRQQueue raised; 258 IRQQueue servicing; 259 qemu_irq *irqs; 260 261 /* Count of IRQ sources asserting on non-INT outputs */ 262 uint32_t outputs_active[OPENPIC_OUTPUT_NB]; 263 } IRQDest; 264 265 #define OPENPIC(obj) OBJECT_CHECK(OpenPICState, (obj), TYPE_OPENPIC) 266 267 typedef struct OpenPICState { 268 /*< private >*/ 269 SysBusDevice parent_obj; 270 /*< public >*/ 271 272 MemoryRegion mem; 273 274 /* Behavior control */ 275 FslMpicInfo *fsl; 276 uint32_t model; 277 uint32_t flags; 278 uint32_t nb_irqs; 279 uint32_t vid; 280 uint32_t vir; /* Vendor identification register */ 281 uint32_t vector_mask; 282 uint32_t tfrr_reset; 283 uint32_t ivpr_reset; 284 uint32_t idr_reset; 285 uint32_t brr1; 286 uint32_t mpic_mode_mask; 287 288 /* Sub-regions */ 289 MemoryRegion sub_io_mem[6]; 290 291 /* Global registers */ 292 uint32_t frr; /* Feature reporting register */ 293 uint32_t gcr; /* Global configuration register */ 294 uint32_t pir; /* Processor initialization register */ 295 uint32_t spve; /* Spurious vector register */ 296 uint32_t tfrr; /* Timer frequency reporting register */ 297 /* Source registers */ 298 IRQSource src[OPENPIC_MAX_IRQ]; 299 /* Local registers per output pin */ 300 IRQDest dst[MAX_CPU]; 301 uint32_t nb_cpus; 302 /* Timer registers */ 303 OpenPICTimer timers[OPENPIC_MAX_TMR]; 304 /* Shared MSI registers */ 305 OpenPICMSI msi[MAX_MSI]; 306 uint32_t max_irq; 307 uint32_t irq_ipi0; 308 uint32_t irq_tim0; 309 uint32_t irq_msi; 310 } OpenPICState; 311 312 static inline void IRQ_setbit(IRQQueue *q, int n_IRQ) 313 { 314 set_bit(n_IRQ, q->queue); 315 } 316 317 static inline void IRQ_resetbit(IRQQueue *q, int n_IRQ) 318 { 319 clear_bit(n_IRQ, q->queue); 320 } 321 322 static void IRQ_check(OpenPICState *opp, IRQQueue *q) 323 { 324 int irq = -1; 325 int next = -1; 326 int priority = -1; 327 328 for (;;) { 329 irq = find_next_bit(q->queue, opp->max_irq, irq + 1); 330 if (irq == opp->max_irq) { 331 break; 332 } 333 334 DPRINTF("IRQ_check: irq %d set ivpr_pr=%d pr=%d\n", 335 irq, IVPR_PRIORITY(opp->src[irq].ivpr), priority); 336 337 if (IVPR_PRIORITY(opp->src[irq].ivpr) > priority) { 338 next = irq; 339 priority = IVPR_PRIORITY(opp->src[irq].ivpr); 340 } 341 } 342 343 q->next = next; 344 q->priority = priority; 345 } 346 347 static int IRQ_get_next(OpenPICState *opp, IRQQueue *q) 348 { 349 /* XXX: optimize */ 350 IRQ_check(opp, q); 351 352 return q->next; 353 } 354 355 static void IRQ_local_pipe(OpenPICState *opp, int n_CPU, int n_IRQ, 356 bool active, bool was_active) 357 { 358 IRQDest *dst; 359 IRQSource *src; 360 int priority; 361 362 dst = &opp->dst[n_CPU]; 363 src = &opp->src[n_IRQ]; 364 365 DPRINTF("%s: IRQ %d active %d was %d\n", 366 __func__, n_IRQ, active, was_active); 367 368 if (src->output != OPENPIC_OUTPUT_INT) { 369 DPRINTF("%s: output %d irq %d active %d was %d count %d\n", 370 __func__, src->output, n_IRQ, active, was_active, 371 dst->outputs_active[src->output]); 372 373 /* On Freescale MPIC, critical interrupts ignore priority, 374 * IACK, EOI, etc. Before MPIC v4.1 they also ignore 375 * masking. 376 */ 377 if (active) { 378 if (!was_active && dst->outputs_active[src->output]++ == 0) { 379 DPRINTF("%s: Raise OpenPIC output %d cpu %d irq %d\n", 380 __func__, src->output, n_CPU, n_IRQ); 381 qemu_irq_raise(dst->irqs[src->output]); 382 } 383 } else { 384 if (was_active && --dst->outputs_active[src->output] == 0) { 385 DPRINTF("%s: Lower OpenPIC output %d cpu %d irq %d\n", 386 __func__, src->output, n_CPU, n_IRQ); 387 qemu_irq_lower(dst->irqs[src->output]); 388 } 389 } 390 391 return; 392 } 393 394 priority = IVPR_PRIORITY(src->ivpr); 395 396 /* Even if the interrupt doesn't have enough priority, 397 * it is still raised, in case ctpr is lowered later. 398 */ 399 if (active) { 400 IRQ_setbit(&dst->raised, n_IRQ); 401 } else { 402 IRQ_resetbit(&dst->raised, n_IRQ); 403 } 404 405 IRQ_check(opp, &dst->raised); 406 407 if (active && priority <= dst->ctpr) { 408 DPRINTF("%s: IRQ %d priority %d too low for ctpr %d on CPU %d\n", 409 __func__, n_IRQ, priority, dst->ctpr, n_CPU); 410 active = 0; 411 } 412 413 if (active) { 414 if (IRQ_get_next(opp, &dst->servicing) >= 0 && 415 priority <= dst->servicing.priority) { 416 DPRINTF("%s: IRQ %d is hidden by servicing IRQ %d on CPU %d\n", 417 __func__, n_IRQ, dst->servicing.next, n_CPU); 418 } else { 419 DPRINTF("%s: Raise OpenPIC INT output cpu %d irq %d/%d\n", 420 __func__, n_CPU, n_IRQ, dst->raised.next); 421 qemu_irq_raise(opp->dst[n_CPU].irqs[OPENPIC_OUTPUT_INT]); 422 } 423 } else { 424 IRQ_get_next(opp, &dst->servicing); 425 if (dst->raised.priority > dst->ctpr && 426 dst->raised.priority > dst->servicing.priority) { 427 DPRINTF("%s: IRQ %d inactive, IRQ %d prio %d above %d/%d, CPU %d\n", 428 __func__, n_IRQ, dst->raised.next, dst->raised.priority, 429 dst->ctpr, dst->servicing.priority, n_CPU); 430 /* IRQ line stays asserted */ 431 } else { 432 DPRINTF("%s: IRQ %d inactive, current prio %d/%d, CPU %d\n", 433 __func__, n_IRQ, dst->ctpr, dst->servicing.priority, n_CPU); 434 qemu_irq_lower(opp->dst[n_CPU].irqs[OPENPIC_OUTPUT_INT]); 435 } 436 } 437 } 438 439 /* update pic state because registers for n_IRQ have changed value */ 440 static void openpic_update_irq(OpenPICState *opp, int n_IRQ) 441 { 442 IRQSource *src; 443 bool active, was_active; 444 int i; 445 446 src = &opp->src[n_IRQ]; 447 active = src->pending; 448 449 if ((src->ivpr & IVPR_MASK_MASK) && !src->nomask) { 450 /* Interrupt source is disabled */ 451 DPRINTF("%s: IRQ %d is disabled\n", __func__, n_IRQ); 452 active = false; 453 } 454 455 was_active = !!(src->ivpr & IVPR_ACTIVITY_MASK); 456 457 /* 458 * We don't have a similar check for already-active because 459 * ctpr may have changed and we need to withdraw the interrupt. 460 */ 461 if (!active && !was_active) { 462 DPRINTF("%s: IRQ %d is already inactive\n", __func__, n_IRQ); 463 return; 464 } 465 466 if (active) { 467 src->ivpr |= IVPR_ACTIVITY_MASK; 468 } else { 469 src->ivpr &= ~IVPR_ACTIVITY_MASK; 470 } 471 472 if (src->destmask == 0) { 473 /* No target */ 474 DPRINTF("%s: IRQ %d has no target\n", __func__, n_IRQ); 475 return; 476 } 477 478 if (src->destmask == (1 << src->last_cpu)) { 479 /* Only one CPU is allowed to receive this IRQ */ 480 IRQ_local_pipe(opp, src->last_cpu, n_IRQ, active, was_active); 481 } else if (!(src->ivpr & IVPR_MODE_MASK)) { 482 /* Directed delivery mode */ 483 for (i = 0; i < opp->nb_cpus; i++) { 484 if (src->destmask & (1 << i)) { 485 IRQ_local_pipe(opp, i, n_IRQ, active, was_active); 486 } 487 } 488 } else { 489 /* Distributed delivery mode */ 490 for (i = src->last_cpu + 1; i != src->last_cpu; i++) { 491 if (i == opp->nb_cpus) { 492 i = 0; 493 } 494 if (src->destmask & (1 << i)) { 495 IRQ_local_pipe(opp, i, n_IRQ, active, was_active); 496 src->last_cpu = i; 497 break; 498 } 499 } 500 } 501 } 502 503 static void openpic_set_irq(void *opaque, int n_IRQ, int level) 504 { 505 OpenPICState *opp = opaque; 506 IRQSource *src; 507 508 if (n_IRQ >= OPENPIC_MAX_IRQ) { 509 fprintf(stderr, "%s: IRQ %d out of range\n", __func__, n_IRQ); 510 abort(); 511 } 512 513 src = &opp->src[n_IRQ]; 514 DPRINTF("openpic: set irq %d = %d ivpr=0x%08x\n", 515 n_IRQ, level, src->ivpr); 516 if (src->level) { 517 /* level-sensitive irq */ 518 src->pending = level; 519 openpic_update_irq(opp, n_IRQ); 520 } else { 521 /* edge-sensitive irq */ 522 if (level) { 523 src->pending = 1; 524 openpic_update_irq(opp, n_IRQ); 525 } 526 527 if (src->output != OPENPIC_OUTPUT_INT) { 528 /* Edge-triggered interrupts shouldn't be used 529 * with non-INT delivery, but just in case, 530 * try to make it do something sane rather than 531 * cause an interrupt storm. This is close to 532 * what you'd probably see happen in real hardware. 533 */ 534 src->pending = 0; 535 openpic_update_irq(opp, n_IRQ); 536 } 537 } 538 } 539 540 static inline uint32_t read_IRQreg_idr(OpenPICState *opp, int n_IRQ) 541 { 542 return opp->src[n_IRQ].idr; 543 } 544 545 static inline uint32_t read_IRQreg_ilr(OpenPICState *opp, int n_IRQ) 546 { 547 if (opp->flags & OPENPIC_FLAG_ILR) { 548 return output_to_inttgt(opp->src[n_IRQ].output); 549 } 550 551 return 0xffffffff; 552 } 553 554 static inline uint32_t read_IRQreg_ivpr(OpenPICState *opp, int n_IRQ) 555 { 556 return opp->src[n_IRQ].ivpr; 557 } 558 559 static inline void write_IRQreg_idr(OpenPICState *opp, int n_IRQ, uint32_t val) 560 { 561 IRQSource *src = &opp->src[n_IRQ]; 562 uint32_t normal_mask = (1UL << opp->nb_cpus) - 1; 563 uint32_t crit_mask = 0; 564 uint32_t mask = normal_mask; 565 int crit_shift = IDR_EP_SHIFT - opp->nb_cpus; 566 int i; 567 568 if (opp->flags & OPENPIC_FLAG_IDR_CRIT) { 569 crit_mask = mask << crit_shift; 570 mask |= crit_mask | IDR_EP; 571 } 572 573 src->idr = val & mask; 574 DPRINTF("Set IDR %d to 0x%08x\n", n_IRQ, src->idr); 575 576 if (opp->flags & OPENPIC_FLAG_IDR_CRIT) { 577 if (src->idr & crit_mask) { 578 if (src->idr & normal_mask) { 579 DPRINTF("%s: IRQ configured for multiple output types, using " 580 "critical\n", __func__); 581 } 582 583 src->output = OPENPIC_OUTPUT_CINT; 584 src->nomask = true; 585 src->destmask = 0; 586 587 for (i = 0; i < opp->nb_cpus; i++) { 588 int n_ci = IDR_CI0_SHIFT - i; 589 590 if (src->idr & (1UL << n_ci)) { 591 src->destmask |= 1UL << i; 592 } 593 } 594 } else { 595 src->output = OPENPIC_OUTPUT_INT; 596 src->nomask = false; 597 src->destmask = src->idr & normal_mask; 598 } 599 } else { 600 src->destmask = src->idr; 601 } 602 } 603 604 static inline void write_IRQreg_ilr(OpenPICState *opp, int n_IRQ, uint32_t val) 605 { 606 if (opp->flags & OPENPIC_FLAG_ILR) { 607 IRQSource *src = &opp->src[n_IRQ]; 608 609 src->output = inttgt_to_output(val & ILR_INTTGT_MASK); 610 DPRINTF("Set ILR %d to 0x%08x, output %d\n", n_IRQ, src->idr, 611 src->output); 612 613 /* TODO: on MPIC v4.0 only, set nomask for non-INT */ 614 } 615 } 616 617 static inline void write_IRQreg_ivpr(OpenPICState *opp, int n_IRQ, uint32_t val) 618 { 619 uint32_t mask; 620 621 /* NOTE when implementing newer FSL MPIC models: starting with v4.0, 622 * the polarity bit is read-only on internal interrupts. 623 */ 624 mask = IVPR_MASK_MASK | IVPR_PRIORITY_MASK | IVPR_SENSE_MASK | 625 IVPR_POLARITY_MASK | opp->vector_mask; 626 627 /* ACTIVITY bit is read-only */ 628 opp->src[n_IRQ].ivpr = 629 (opp->src[n_IRQ].ivpr & IVPR_ACTIVITY_MASK) | (val & mask); 630 631 /* For FSL internal interrupts, The sense bit is reserved and zero, 632 * and the interrupt is always level-triggered. Timers and IPIs 633 * have no sense or polarity bits, and are edge-triggered. 634 */ 635 switch (opp->src[n_IRQ].type) { 636 case IRQ_TYPE_NORMAL: 637 opp->src[n_IRQ].level = !!(opp->src[n_IRQ].ivpr & IVPR_SENSE_MASK); 638 break; 639 640 case IRQ_TYPE_FSLINT: 641 opp->src[n_IRQ].ivpr &= ~IVPR_SENSE_MASK; 642 break; 643 644 case IRQ_TYPE_FSLSPECIAL: 645 opp->src[n_IRQ].ivpr &= ~(IVPR_POLARITY_MASK | IVPR_SENSE_MASK); 646 break; 647 } 648 649 openpic_update_irq(opp, n_IRQ); 650 DPRINTF("Set IVPR %d to 0x%08x -> 0x%08x\n", n_IRQ, val, 651 opp->src[n_IRQ].ivpr); 652 } 653 654 static void openpic_gcr_write(OpenPICState *opp, uint64_t val) 655 { 656 bool mpic_proxy = false; 657 658 if (val & GCR_RESET) { 659 openpic_reset(DEVICE(opp)); 660 return; 661 } 662 663 opp->gcr &= ~opp->mpic_mode_mask; 664 opp->gcr |= val & opp->mpic_mode_mask; 665 666 /* Set external proxy mode */ 667 if ((val & opp->mpic_mode_mask) == GCR_MODE_PROXY) { 668 mpic_proxy = true; 669 } 670 671 ppce500_set_mpic_proxy(mpic_proxy); 672 } 673 674 static void openpic_gbl_write(void *opaque, hwaddr addr, uint64_t val, 675 unsigned len) 676 { 677 OpenPICState *opp = opaque; 678 IRQDest *dst; 679 int idx; 680 681 DPRINTF("%s: addr %#" HWADDR_PRIx " <= %08" PRIx64 "\n", 682 __func__, addr, val); 683 if (addr & 0xF) { 684 return; 685 } 686 switch (addr) { 687 case 0x00: /* Block Revision Register1 (BRR1) is Readonly */ 688 break; 689 case 0x40: 690 case 0x50: 691 case 0x60: 692 case 0x70: 693 case 0x80: 694 case 0x90: 695 case 0xA0: 696 case 0xB0: 697 openpic_cpu_write_internal(opp, addr, val, get_current_cpu()); 698 break; 699 case 0x1000: /* FRR */ 700 break; 701 case 0x1020: /* GCR */ 702 openpic_gcr_write(opp, val); 703 break; 704 case 0x1080: /* VIR */ 705 break; 706 case 0x1090: /* PIR */ 707 for (idx = 0; idx < opp->nb_cpus; idx++) { 708 if ((val & (1 << idx)) && !(opp->pir & (1 << idx))) { 709 DPRINTF("Raise OpenPIC RESET output for CPU %d\n", idx); 710 dst = &opp->dst[idx]; 711 qemu_irq_raise(dst->irqs[OPENPIC_OUTPUT_RESET]); 712 } else if (!(val & (1 << idx)) && (opp->pir & (1 << idx))) { 713 DPRINTF("Lower OpenPIC RESET output for CPU %d\n", idx); 714 dst = &opp->dst[idx]; 715 qemu_irq_lower(dst->irqs[OPENPIC_OUTPUT_RESET]); 716 } 717 } 718 opp->pir = val; 719 break; 720 case 0x10A0: /* IPI_IVPR */ 721 case 0x10B0: 722 case 0x10C0: 723 case 0x10D0: 724 { 725 int idx; 726 idx = (addr - 0x10A0) >> 4; 727 write_IRQreg_ivpr(opp, opp->irq_ipi0 + idx, val); 728 } 729 break; 730 case 0x10E0: /* SPVE */ 731 opp->spve = val & opp->vector_mask; 732 break; 733 default: 734 break; 735 } 736 } 737 738 static uint64_t openpic_gbl_read(void *opaque, hwaddr addr, unsigned len) 739 { 740 OpenPICState *opp = opaque; 741 uint32_t retval; 742 743 DPRINTF("%s: addr %#" HWADDR_PRIx "\n", __func__, addr); 744 retval = 0xFFFFFFFF; 745 if (addr & 0xF) { 746 return retval; 747 } 748 switch (addr) { 749 case 0x1000: /* FRR */ 750 retval = opp->frr; 751 break; 752 case 0x1020: /* GCR */ 753 retval = opp->gcr; 754 break; 755 case 0x1080: /* VIR */ 756 retval = opp->vir; 757 break; 758 case 0x1090: /* PIR */ 759 retval = 0x00000000; 760 break; 761 case 0x00: /* Block Revision Register1 (BRR1) */ 762 retval = opp->brr1; 763 break; 764 case 0x40: 765 case 0x50: 766 case 0x60: 767 case 0x70: 768 case 0x80: 769 case 0x90: 770 case 0xA0: 771 case 0xB0: 772 retval = openpic_cpu_read_internal(opp, addr, get_current_cpu()); 773 break; 774 case 0x10A0: /* IPI_IVPR */ 775 case 0x10B0: 776 case 0x10C0: 777 case 0x10D0: 778 { 779 int idx; 780 idx = (addr - 0x10A0) >> 4; 781 retval = read_IRQreg_ivpr(opp, opp->irq_ipi0 + idx); 782 } 783 break; 784 case 0x10E0: /* SPVE */ 785 retval = opp->spve; 786 break; 787 default: 788 break; 789 } 790 DPRINTF("%s: => 0x%08x\n", __func__, retval); 791 792 return retval; 793 } 794 795 static void openpic_tmr_write(void *opaque, hwaddr addr, uint64_t val, 796 unsigned len) 797 { 798 OpenPICState *opp = opaque; 799 int idx; 800 801 addr += 0x10f0; 802 803 DPRINTF("%s: addr %#" HWADDR_PRIx " <= %08" PRIx64 "\n", 804 __func__, addr, val); 805 if (addr & 0xF) { 806 return; 807 } 808 809 if (addr == 0x10f0) { 810 /* TFRR */ 811 opp->tfrr = val; 812 return; 813 } 814 815 idx = (addr >> 6) & 0x3; 816 addr = addr & 0x30; 817 818 switch (addr & 0x30) { 819 case 0x00: /* TCCR */ 820 break; 821 case 0x10: /* TBCR */ 822 if ((opp->timers[idx].tccr & TCCR_TOG) != 0 && 823 (val & TBCR_CI) == 0 && 824 (opp->timers[idx].tbcr & TBCR_CI) != 0) { 825 opp->timers[idx].tccr &= ~TCCR_TOG; 826 } 827 opp->timers[idx].tbcr = val; 828 break; 829 case 0x20: /* TVPR */ 830 write_IRQreg_ivpr(opp, opp->irq_tim0 + idx, val); 831 break; 832 case 0x30: /* TDR */ 833 write_IRQreg_idr(opp, opp->irq_tim0 + idx, val); 834 break; 835 } 836 } 837 838 static uint64_t openpic_tmr_read(void *opaque, hwaddr addr, unsigned len) 839 { 840 OpenPICState *opp = opaque; 841 uint32_t retval = -1; 842 int idx; 843 844 DPRINTF("%s: addr %#" HWADDR_PRIx "\n", __func__, addr); 845 if (addr & 0xF) { 846 goto out; 847 } 848 idx = (addr >> 6) & 0x3; 849 if (addr == 0x0) { 850 /* TFRR */ 851 retval = opp->tfrr; 852 goto out; 853 } 854 switch (addr & 0x30) { 855 case 0x00: /* TCCR */ 856 retval = opp->timers[idx].tccr; 857 break; 858 case 0x10: /* TBCR */ 859 retval = opp->timers[idx].tbcr; 860 break; 861 case 0x20: /* TIPV */ 862 retval = read_IRQreg_ivpr(opp, opp->irq_tim0 + idx); 863 break; 864 case 0x30: /* TIDE (TIDR) */ 865 retval = read_IRQreg_idr(opp, opp->irq_tim0 + idx); 866 break; 867 } 868 869 out: 870 DPRINTF("%s: => 0x%08x\n", __func__, retval); 871 872 return retval; 873 } 874 875 static void openpic_src_write(void *opaque, hwaddr addr, uint64_t val, 876 unsigned len) 877 { 878 OpenPICState *opp = opaque; 879 int idx; 880 881 DPRINTF("%s: addr %#" HWADDR_PRIx " <= %08" PRIx64 "\n", 882 __func__, addr, val); 883 884 addr = addr & 0xffff; 885 idx = addr >> 5; 886 887 switch (addr & 0x1f) { 888 case 0x00: 889 write_IRQreg_ivpr(opp, idx, val); 890 break; 891 case 0x10: 892 write_IRQreg_idr(opp, idx, val); 893 break; 894 case 0x18: 895 write_IRQreg_ilr(opp, idx, val); 896 break; 897 } 898 } 899 900 static uint64_t openpic_src_read(void *opaque, uint64_t addr, unsigned len) 901 { 902 OpenPICState *opp = opaque; 903 uint32_t retval; 904 int idx; 905 906 DPRINTF("%s: addr %#" HWADDR_PRIx "\n", __func__, addr); 907 retval = 0xFFFFFFFF; 908 909 addr = addr & 0xffff; 910 idx = addr >> 5; 911 912 switch (addr & 0x1f) { 913 case 0x00: 914 retval = read_IRQreg_ivpr(opp, idx); 915 break; 916 case 0x10: 917 retval = read_IRQreg_idr(opp, idx); 918 break; 919 case 0x18: 920 retval = read_IRQreg_ilr(opp, idx); 921 break; 922 } 923 924 DPRINTF("%s: => 0x%08x\n", __func__, retval); 925 return retval; 926 } 927 928 static void openpic_msi_write(void *opaque, hwaddr addr, uint64_t val, 929 unsigned size) 930 { 931 OpenPICState *opp = opaque; 932 int idx = opp->irq_msi; 933 int srs, ibs; 934 935 DPRINTF("%s: addr %#" HWADDR_PRIx " <= 0x%08" PRIx64 "\n", 936 __func__, addr, val); 937 if (addr & 0xF) { 938 return; 939 } 940 941 switch (addr) { 942 case MSIIR_OFFSET: 943 srs = val >> MSIIR_SRS_SHIFT; 944 idx += srs; 945 ibs = (val & MSIIR_IBS_MASK) >> MSIIR_IBS_SHIFT; 946 opp->msi[srs].msir |= 1 << ibs; 947 openpic_set_irq(opp, idx, 1); 948 break; 949 default: 950 /* most registers are read-only, thus ignored */ 951 break; 952 } 953 } 954 955 static uint64_t openpic_msi_read(void *opaque, hwaddr addr, unsigned size) 956 { 957 OpenPICState *opp = opaque; 958 uint64_t r = 0; 959 int i, srs; 960 961 DPRINTF("%s: addr %#" HWADDR_PRIx "\n", __func__, addr); 962 if (addr & 0xF) { 963 return -1; 964 } 965 966 srs = addr >> 4; 967 968 switch (addr) { 969 case 0x00: 970 case 0x10: 971 case 0x20: 972 case 0x30: 973 case 0x40: 974 case 0x50: 975 case 0x60: 976 case 0x70: /* MSIRs */ 977 r = opp->msi[srs].msir; 978 /* Clear on read */ 979 opp->msi[srs].msir = 0; 980 openpic_set_irq(opp, opp->irq_msi + srs, 0); 981 break; 982 case 0x120: /* MSISR */ 983 for (i = 0; i < MAX_MSI; i++) { 984 r |= (opp->msi[i].msir ? 1 : 0) << i; 985 } 986 break; 987 } 988 989 return r; 990 } 991 992 static uint64_t openpic_summary_read(void *opaque, hwaddr addr, unsigned size) 993 { 994 uint64_t r = 0; 995 996 DPRINTF("%s: addr %#" HWADDR_PRIx "\n", __func__, addr); 997 998 /* TODO: EISR/EIMR */ 999 1000 return r; 1001 } 1002 1003 static void openpic_summary_write(void *opaque, hwaddr addr, uint64_t val, 1004 unsigned size) 1005 { 1006 DPRINTF("%s: addr %#" HWADDR_PRIx " <= 0x%08" PRIx64 "\n", 1007 __func__, addr, val); 1008 1009 /* TODO: EISR/EIMR */ 1010 } 1011 1012 static void openpic_cpu_write_internal(void *opaque, hwaddr addr, 1013 uint32_t val, int idx) 1014 { 1015 OpenPICState *opp = opaque; 1016 IRQSource *src; 1017 IRQDest *dst; 1018 int s_IRQ, n_IRQ; 1019 1020 DPRINTF("%s: cpu %d addr %#" HWADDR_PRIx " <= 0x%08x\n", __func__, idx, 1021 addr, val); 1022 1023 if (idx < 0 || idx >= opp->nb_cpus) { 1024 return; 1025 } 1026 1027 if (addr & 0xF) { 1028 return; 1029 } 1030 dst = &opp->dst[idx]; 1031 addr &= 0xFF0; 1032 switch (addr) { 1033 case 0x40: /* IPIDR */ 1034 case 0x50: 1035 case 0x60: 1036 case 0x70: 1037 idx = (addr - 0x40) >> 4; 1038 /* we use IDE as mask which CPUs to deliver the IPI to still. */ 1039 opp->src[opp->irq_ipi0 + idx].destmask |= val; 1040 openpic_set_irq(opp, opp->irq_ipi0 + idx, 1); 1041 openpic_set_irq(opp, opp->irq_ipi0 + idx, 0); 1042 break; 1043 case 0x80: /* CTPR */ 1044 dst->ctpr = val & 0x0000000F; 1045 1046 DPRINTF("%s: set CPU %d ctpr to %d, raised %d servicing %d\n", 1047 __func__, idx, dst->ctpr, dst->raised.priority, 1048 dst->servicing.priority); 1049 1050 if (dst->raised.priority <= dst->ctpr) { 1051 DPRINTF("%s: Lower OpenPIC INT output cpu %d due to ctpr\n", 1052 __func__, idx); 1053 qemu_irq_lower(dst->irqs[OPENPIC_OUTPUT_INT]); 1054 } else if (dst->raised.priority > dst->servicing.priority) { 1055 DPRINTF("%s: Raise OpenPIC INT output cpu %d irq %d\n", 1056 __func__, idx, dst->raised.next); 1057 qemu_irq_raise(dst->irqs[OPENPIC_OUTPUT_INT]); 1058 } 1059 1060 break; 1061 case 0x90: /* WHOAMI */ 1062 /* Read-only register */ 1063 break; 1064 case 0xA0: /* IACK */ 1065 /* Read-only register */ 1066 break; 1067 case 0xB0: /* EOI */ 1068 DPRINTF("EOI\n"); 1069 s_IRQ = IRQ_get_next(opp, &dst->servicing); 1070 1071 if (s_IRQ < 0) { 1072 DPRINTF("%s: EOI with no interrupt in service\n", __func__); 1073 break; 1074 } 1075 1076 IRQ_resetbit(&dst->servicing, s_IRQ); 1077 /* Set up next servicing IRQ */ 1078 s_IRQ = IRQ_get_next(opp, &dst->servicing); 1079 /* Check queued interrupts. */ 1080 n_IRQ = IRQ_get_next(opp, &dst->raised); 1081 src = &opp->src[n_IRQ]; 1082 if (n_IRQ != -1 && 1083 (s_IRQ == -1 || 1084 IVPR_PRIORITY(src->ivpr) > dst->servicing.priority)) { 1085 DPRINTF("Raise OpenPIC INT output cpu %d irq %d\n", 1086 idx, n_IRQ); 1087 qemu_irq_raise(opp->dst[idx].irqs[OPENPIC_OUTPUT_INT]); 1088 } 1089 break; 1090 default: 1091 break; 1092 } 1093 } 1094 1095 static void openpic_cpu_write(void *opaque, hwaddr addr, uint64_t val, 1096 unsigned len) 1097 { 1098 openpic_cpu_write_internal(opaque, addr, val, (addr & 0x1f000) >> 12); 1099 } 1100 1101 1102 static uint32_t openpic_iack(OpenPICState *opp, IRQDest *dst, int cpu) 1103 { 1104 IRQSource *src; 1105 int retval, irq; 1106 1107 DPRINTF("Lower OpenPIC INT output\n"); 1108 qemu_irq_lower(dst->irqs[OPENPIC_OUTPUT_INT]); 1109 1110 irq = IRQ_get_next(opp, &dst->raised); 1111 DPRINTF("IACK: irq=%d\n", irq); 1112 1113 if (irq == -1) { 1114 /* No more interrupt pending */ 1115 return opp->spve; 1116 } 1117 1118 src = &opp->src[irq]; 1119 if (!(src->ivpr & IVPR_ACTIVITY_MASK) || 1120 !(IVPR_PRIORITY(src->ivpr) > dst->ctpr)) { 1121 fprintf(stderr, "%s: bad raised IRQ %d ctpr %d ivpr 0x%08x\n", 1122 __func__, irq, dst->ctpr, src->ivpr); 1123 openpic_update_irq(opp, irq); 1124 retval = opp->spve; 1125 } else { 1126 /* IRQ enter servicing state */ 1127 IRQ_setbit(&dst->servicing, irq); 1128 retval = IVPR_VECTOR(opp, src->ivpr); 1129 } 1130 1131 if (!src->level) { 1132 /* edge-sensitive IRQ */ 1133 src->ivpr &= ~IVPR_ACTIVITY_MASK; 1134 src->pending = 0; 1135 IRQ_resetbit(&dst->raised, irq); 1136 } 1137 1138 if ((irq >= opp->irq_ipi0) && (irq < (opp->irq_ipi0 + OPENPIC_MAX_IPI))) { 1139 src->destmask &= ~(1 << cpu); 1140 if (src->destmask && !src->level) { 1141 /* trigger on CPUs that didn't know about it yet */ 1142 openpic_set_irq(opp, irq, 1); 1143 openpic_set_irq(opp, irq, 0); 1144 /* if all CPUs knew about it, set active bit again */ 1145 src->ivpr |= IVPR_ACTIVITY_MASK; 1146 } 1147 } 1148 1149 return retval; 1150 } 1151 1152 static uint32_t openpic_cpu_read_internal(void *opaque, hwaddr addr, 1153 int idx) 1154 { 1155 OpenPICState *opp = opaque; 1156 IRQDest *dst; 1157 uint32_t retval; 1158 1159 DPRINTF("%s: cpu %d addr %#" HWADDR_PRIx "\n", __func__, idx, addr); 1160 retval = 0xFFFFFFFF; 1161 1162 if (idx < 0 || idx >= opp->nb_cpus) { 1163 return retval; 1164 } 1165 1166 if (addr & 0xF) { 1167 return retval; 1168 } 1169 dst = &opp->dst[idx]; 1170 addr &= 0xFF0; 1171 switch (addr) { 1172 case 0x80: /* CTPR */ 1173 retval = dst->ctpr; 1174 break; 1175 case 0x90: /* WHOAMI */ 1176 retval = idx; 1177 break; 1178 case 0xA0: /* IACK */ 1179 retval = openpic_iack(opp, dst, idx); 1180 break; 1181 case 0xB0: /* EOI */ 1182 retval = 0; 1183 break; 1184 default: 1185 break; 1186 } 1187 DPRINTF("%s: => 0x%08x\n", __func__, retval); 1188 1189 return retval; 1190 } 1191 1192 static uint64_t openpic_cpu_read(void *opaque, hwaddr addr, unsigned len) 1193 { 1194 return openpic_cpu_read_internal(opaque, addr, (addr & 0x1f000) >> 12); 1195 } 1196 1197 static const MemoryRegionOps openpic_glb_ops_le = { 1198 .write = openpic_gbl_write, 1199 .read = openpic_gbl_read, 1200 .endianness = DEVICE_LITTLE_ENDIAN, 1201 .impl = { 1202 .min_access_size = 4, 1203 .max_access_size = 4, 1204 }, 1205 }; 1206 1207 static const MemoryRegionOps openpic_glb_ops_be = { 1208 .write = openpic_gbl_write, 1209 .read = openpic_gbl_read, 1210 .endianness = DEVICE_BIG_ENDIAN, 1211 .impl = { 1212 .min_access_size = 4, 1213 .max_access_size = 4, 1214 }, 1215 }; 1216 1217 static const MemoryRegionOps openpic_tmr_ops_le = { 1218 .write = openpic_tmr_write, 1219 .read = openpic_tmr_read, 1220 .endianness = DEVICE_LITTLE_ENDIAN, 1221 .impl = { 1222 .min_access_size = 4, 1223 .max_access_size = 4, 1224 }, 1225 }; 1226 1227 static const MemoryRegionOps openpic_tmr_ops_be = { 1228 .write = openpic_tmr_write, 1229 .read = openpic_tmr_read, 1230 .endianness = DEVICE_BIG_ENDIAN, 1231 .impl = { 1232 .min_access_size = 4, 1233 .max_access_size = 4, 1234 }, 1235 }; 1236 1237 static const MemoryRegionOps openpic_cpu_ops_le = { 1238 .write = openpic_cpu_write, 1239 .read = openpic_cpu_read, 1240 .endianness = DEVICE_LITTLE_ENDIAN, 1241 .impl = { 1242 .min_access_size = 4, 1243 .max_access_size = 4, 1244 }, 1245 }; 1246 1247 static const MemoryRegionOps openpic_cpu_ops_be = { 1248 .write = openpic_cpu_write, 1249 .read = openpic_cpu_read, 1250 .endianness = DEVICE_BIG_ENDIAN, 1251 .impl = { 1252 .min_access_size = 4, 1253 .max_access_size = 4, 1254 }, 1255 }; 1256 1257 static const MemoryRegionOps openpic_src_ops_le = { 1258 .write = openpic_src_write, 1259 .read = openpic_src_read, 1260 .endianness = DEVICE_LITTLE_ENDIAN, 1261 .impl = { 1262 .min_access_size = 4, 1263 .max_access_size = 4, 1264 }, 1265 }; 1266 1267 static const MemoryRegionOps openpic_src_ops_be = { 1268 .write = openpic_src_write, 1269 .read = openpic_src_read, 1270 .endianness = DEVICE_BIG_ENDIAN, 1271 .impl = { 1272 .min_access_size = 4, 1273 .max_access_size = 4, 1274 }, 1275 }; 1276 1277 static const MemoryRegionOps openpic_msi_ops_be = { 1278 .read = openpic_msi_read, 1279 .write = openpic_msi_write, 1280 .endianness = DEVICE_BIG_ENDIAN, 1281 .impl = { 1282 .min_access_size = 4, 1283 .max_access_size = 4, 1284 }, 1285 }; 1286 1287 static const MemoryRegionOps openpic_summary_ops_be = { 1288 .read = openpic_summary_read, 1289 .write = openpic_summary_write, 1290 .endianness = DEVICE_BIG_ENDIAN, 1291 .impl = { 1292 .min_access_size = 4, 1293 .max_access_size = 4, 1294 }, 1295 }; 1296 1297 static void openpic_reset(DeviceState *d) 1298 { 1299 OpenPICState *opp = OPENPIC(d); 1300 int i; 1301 1302 opp->gcr = GCR_RESET; 1303 /* Initialise controller registers */ 1304 opp->frr = ((opp->nb_irqs - 1) << FRR_NIRQ_SHIFT) | 1305 ((opp->nb_cpus - 1) << FRR_NCPU_SHIFT) | 1306 (opp->vid << FRR_VID_SHIFT); 1307 1308 opp->pir = 0; 1309 opp->spve = -1 & opp->vector_mask; 1310 opp->tfrr = opp->tfrr_reset; 1311 /* Initialise IRQ sources */ 1312 for (i = 0; i < opp->max_irq; i++) { 1313 opp->src[i].ivpr = opp->ivpr_reset; 1314 switch (opp->src[i].type) { 1315 case IRQ_TYPE_NORMAL: 1316 opp->src[i].level = !!(opp->ivpr_reset & IVPR_SENSE_MASK); 1317 break; 1318 1319 case IRQ_TYPE_FSLINT: 1320 opp->src[i].ivpr |= IVPR_POLARITY_MASK; 1321 break; 1322 1323 case IRQ_TYPE_FSLSPECIAL: 1324 break; 1325 } 1326 1327 write_IRQreg_idr(opp, i, opp->idr_reset); 1328 } 1329 /* Initialise IRQ destinations */ 1330 for (i = 0; i < opp->nb_cpus; i++) { 1331 opp->dst[i].ctpr = 15; 1332 opp->dst[i].raised.next = -1; 1333 opp->dst[i].raised.priority = 0; 1334 bitmap_clear(opp->dst[i].raised.queue, 0, IRQQUEUE_SIZE_BITS); 1335 opp->dst[i].servicing.next = -1; 1336 opp->dst[i].servicing.priority = 0; 1337 bitmap_clear(opp->dst[i].servicing.queue, 0, IRQQUEUE_SIZE_BITS); 1338 } 1339 /* Initialise timers */ 1340 for (i = 0; i < OPENPIC_MAX_TMR; i++) { 1341 opp->timers[i].tccr = 0; 1342 opp->timers[i].tbcr = TBCR_CI; 1343 } 1344 /* Go out of RESET state */ 1345 opp->gcr = 0; 1346 } 1347 1348 typedef struct MemReg { 1349 const char *name; 1350 MemoryRegionOps const *ops; 1351 hwaddr start_addr; 1352 ram_addr_t size; 1353 } MemReg; 1354 1355 static void fsl_common_init(OpenPICState *opp) 1356 { 1357 int i; 1358 int virq = OPENPIC_MAX_SRC; 1359 1360 opp->vid = VID_REVISION_1_2; 1361 opp->vir = VIR_GENERIC; 1362 opp->vector_mask = 0xFFFF; 1363 opp->tfrr_reset = 0; 1364 opp->ivpr_reset = IVPR_MASK_MASK; 1365 opp->idr_reset = 1 << 0; 1366 opp->max_irq = OPENPIC_MAX_IRQ; 1367 1368 opp->irq_ipi0 = virq; 1369 virq += OPENPIC_MAX_IPI; 1370 opp->irq_tim0 = virq; 1371 virq += OPENPIC_MAX_TMR; 1372 1373 assert(virq <= OPENPIC_MAX_IRQ); 1374 1375 opp->irq_msi = 224; 1376 1377 msi_supported = true; 1378 for (i = 0; i < opp->fsl->max_ext; i++) { 1379 opp->src[i].level = false; 1380 } 1381 1382 /* Internal interrupts, including message and MSI */ 1383 for (i = 16; i < OPENPIC_MAX_SRC; i++) { 1384 opp->src[i].type = IRQ_TYPE_FSLINT; 1385 opp->src[i].level = true; 1386 } 1387 1388 /* timers and IPIs */ 1389 for (i = OPENPIC_MAX_SRC; i < virq; i++) { 1390 opp->src[i].type = IRQ_TYPE_FSLSPECIAL; 1391 opp->src[i].level = false; 1392 } 1393 } 1394 1395 static void map_list(OpenPICState *opp, const MemReg *list, int *count) 1396 { 1397 while (list->name) { 1398 assert(*count < ARRAY_SIZE(opp->sub_io_mem)); 1399 1400 memory_region_init_io(&opp->sub_io_mem[*count], OBJECT(opp), list->ops, 1401 opp, list->name, list->size); 1402 1403 memory_region_add_subregion(&opp->mem, list->start_addr, 1404 &opp->sub_io_mem[*count]); 1405 1406 (*count)++; 1407 list++; 1408 } 1409 } 1410 1411 static const VMStateDescription vmstate_openpic_irq_queue = { 1412 .name = "openpic_irq_queue", 1413 .version_id = 0, 1414 .minimum_version_id = 0, 1415 .fields = (VMStateField[]) { 1416 VMSTATE_BITMAP(queue, IRQQueue, 0, queue_size), 1417 VMSTATE_INT32(next, IRQQueue), 1418 VMSTATE_INT32(priority, IRQQueue), 1419 VMSTATE_END_OF_LIST() 1420 } 1421 }; 1422 1423 static const VMStateDescription vmstate_openpic_irqdest = { 1424 .name = "openpic_irqdest", 1425 .version_id = 0, 1426 .minimum_version_id = 0, 1427 .fields = (VMStateField[]) { 1428 VMSTATE_INT32(ctpr, IRQDest), 1429 VMSTATE_STRUCT(raised, IRQDest, 0, vmstate_openpic_irq_queue, 1430 IRQQueue), 1431 VMSTATE_STRUCT(servicing, IRQDest, 0, vmstate_openpic_irq_queue, 1432 IRQQueue), 1433 VMSTATE_UINT32_ARRAY(outputs_active, IRQDest, OPENPIC_OUTPUT_NB), 1434 VMSTATE_END_OF_LIST() 1435 } 1436 }; 1437 1438 static const VMStateDescription vmstate_openpic_irqsource = { 1439 .name = "openpic_irqsource", 1440 .version_id = 0, 1441 .minimum_version_id = 0, 1442 .fields = (VMStateField[]) { 1443 VMSTATE_UINT32(ivpr, IRQSource), 1444 VMSTATE_UINT32(idr, IRQSource), 1445 VMSTATE_UINT32(destmask, IRQSource), 1446 VMSTATE_INT32(last_cpu, IRQSource), 1447 VMSTATE_INT32(pending, IRQSource), 1448 VMSTATE_END_OF_LIST() 1449 } 1450 }; 1451 1452 static const VMStateDescription vmstate_openpic_timer = { 1453 .name = "openpic_timer", 1454 .version_id = 0, 1455 .minimum_version_id = 0, 1456 .fields = (VMStateField[]) { 1457 VMSTATE_UINT32(tccr, OpenPICTimer), 1458 VMSTATE_UINT32(tbcr, OpenPICTimer), 1459 VMSTATE_END_OF_LIST() 1460 } 1461 }; 1462 1463 static const VMStateDescription vmstate_openpic_msi = { 1464 .name = "openpic_msi", 1465 .version_id = 0, 1466 .minimum_version_id = 0, 1467 .fields = (VMStateField[]) { 1468 VMSTATE_UINT32(msir, OpenPICMSI), 1469 VMSTATE_END_OF_LIST() 1470 } 1471 }; 1472 1473 static int openpic_post_load(void *opaque, int version_id) 1474 { 1475 OpenPICState *opp = (OpenPICState *)opaque; 1476 int i; 1477 1478 /* Update internal ivpr and idr variables */ 1479 for (i = 0; i < opp->max_irq; i++) { 1480 write_IRQreg_idr(opp, i, opp->src[i].idr); 1481 write_IRQreg_ivpr(opp, i, opp->src[i].ivpr); 1482 } 1483 1484 return 0; 1485 } 1486 1487 static const VMStateDescription vmstate_openpic = { 1488 .name = "openpic", 1489 .version_id = 3, 1490 .minimum_version_id = 3, 1491 .post_load = openpic_post_load, 1492 .fields = (VMStateField[]) { 1493 VMSTATE_UINT32(gcr, OpenPICState), 1494 VMSTATE_UINT32(vir, OpenPICState), 1495 VMSTATE_UINT32(pir, OpenPICState), 1496 VMSTATE_UINT32(spve, OpenPICState), 1497 VMSTATE_UINT32(tfrr, OpenPICState), 1498 VMSTATE_UINT32(max_irq, OpenPICState), 1499 VMSTATE_STRUCT_VARRAY_UINT32(src, OpenPICState, max_irq, 0, 1500 vmstate_openpic_irqsource, IRQSource), 1501 VMSTATE_UINT32_EQUAL(nb_cpus, OpenPICState), 1502 VMSTATE_STRUCT_VARRAY_UINT32(dst, OpenPICState, nb_cpus, 0, 1503 vmstate_openpic_irqdest, IRQDest), 1504 VMSTATE_STRUCT_ARRAY(timers, OpenPICState, OPENPIC_MAX_TMR, 0, 1505 vmstate_openpic_timer, OpenPICTimer), 1506 VMSTATE_STRUCT_ARRAY(msi, OpenPICState, MAX_MSI, 0, 1507 vmstate_openpic_msi, OpenPICMSI), 1508 VMSTATE_UINT32(irq_ipi0, OpenPICState), 1509 VMSTATE_UINT32(irq_tim0, OpenPICState), 1510 VMSTATE_UINT32(irq_msi, OpenPICState), 1511 VMSTATE_END_OF_LIST() 1512 } 1513 }; 1514 1515 static void openpic_init(Object *obj) 1516 { 1517 OpenPICState *opp = OPENPIC(obj); 1518 1519 memory_region_init(&opp->mem, obj, "openpic", 0x40000); 1520 } 1521 1522 static void openpic_realize(DeviceState *dev, Error **errp) 1523 { 1524 SysBusDevice *d = SYS_BUS_DEVICE(dev); 1525 OpenPICState *opp = OPENPIC(dev); 1526 int i, j; 1527 int list_count = 0; 1528 static const MemReg list_le[] = { 1529 {"glb", &openpic_glb_ops_le, 1530 OPENPIC_GLB_REG_START, OPENPIC_GLB_REG_SIZE}, 1531 {"tmr", &openpic_tmr_ops_le, 1532 OPENPIC_TMR_REG_START, OPENPIC_TMR_REG_SIZE}, 1533 {"src", &openpic_src_ops_le, 1534 OPENPIC_SRC_REG_START, OPENPIC_SRC_REG_SIZE}, 1535 {"cpu", &openpic_cpu_ops_le, 1536 OPENPIC_CPU_REG_START, OPENPIC_CPU_REG_SIZE}, 1537 {NULL} 1538 }; 1539 static const MemReg list_be[] = { 1540 {"glb", &openpic_glb_ops_be, 1541 OPENPIC_GLB_REG_START, OPENPIC_GLB_REG_SIZE}, 1542 {"tmr", &openpic_tmr_ops_be, 1543 OPENPIC_TMR_REG_START, OPENPIC_TMR_REG_SIZE}, 1544 {"src", &openpic_src_ops_be, 1545 OPENPIC_SRC_REG_START, OPENPIC_SRC_REG_SIZE}, 1546 {"cpu", &openpic_cpu_ops_be, 1547 OPENPIC_CPU_REG_START, OPENPIC_CPU_REG_SIZE}, 1548 {NULL} 1549 }; 1550 static const MemReg list_fsl[] = { 1551 {"msi", &openpic_msi_ops_be, 1552 OPENPIC_MSI_REG_START, OPENPIC_MSI_REG_SIZE}, 1553 {"summary", &openpic_summary_ops_be, 1554 OPENPIC_SUMMARY_REG_START, OPENPIC_SUMMARY_REG_SIZE}, 1555 {NULL} 1556 }; 1557 1558 if (opp->nb_cpus > MAX_CPU) { 1559 error_setg(errp, QERR_PROPERTY_VALUE_OUT_OF_RANGE, 1560 TYPE_OPENPIC, "nb_cpus", (uint64_t)opp->nb_cpus, 1561 (uint64_t)0, (uint64_t)MAX_CPU); 1562 return; 1563 } 1564 1565 switch (opp->model) { 1566 case OPENPIC_MODEL_FSL_MPIC_20: 1567 default: 1568 opp->fsl = &fsl_mpic_20; 1569 opp->brr1 = 0x00400200; 1570 opp->flags |= OPENPIC_FLAG_IDR_CRIT; 1571 opp->nb_irqs = 80; 1572 opp->mpic_mode_mask = GCR_MODE_MIXED; 1573 1574 fsl_common_init(opp); 1575 map_list(opp, list_be, &list_count); 1576 map_list(opp, list_fsl, &list_count); 1577 1578 break; 1579 1580 case OPENPIC_MODEL_FSL_MPIC_42: 1581 opp->fsl = &fsl_mpic_42; 1582 opp->brr1 = 0x00400402; 1583 opp->flags |= OPENPIC_FLAG_ILR; 1584 opp->nb_irqs = 196; 1585 opp->mpic_mode_mask = GCR_MODE_PROXY; 1586 1587 fsl_common_init(opp); 1588 map_list(opp, list_be, &list_count); 1589 map_list(opp, list_fsl, &list_count); 1590 1591 break; 1592 1593 case OPENPIC_MODEL_RAVEN: 1594 opp->nb_irqs = RAVEN_MAX_EXT; 1595 opp->vid = VID_REVISION_1_3; 1596 opp->vir = VIR_GENERIC; 1597 opp->vector_mask = 0xFF; 1598 opp->tfrr_reset = 4160000; 1599 opp->ivpr_reset = IVPR_MASK_MASK | IVPR_MODE_MASK; 1600 opp->idr_reset = 0; 1601 opp->max_irq = RAVEN_MAX_IRQ; 1602 opp->irq_ipi0 = RAVEN_IPI_IRQ; 1603 opp->irq_tim0 = RAVEN_TMR_IRQ; 1604 opp->brr1 = -1; 1605 opp->mpic_mode_mask = GCR_MODE_MIXED; 1606 1607 if (opp->nb_cpus != 1) { 1608 error_setg(errp, "Only UP supported today"); 1609 return; 1610 } 1611 1612 map_list(opp, list_le, &list_count); 1613 break; 1614 } 1615 1616 for (i = 0; i < opp->nb_cpus; i++) { 1617 opp->dst[i].irqs = g_new0(qemu_irq, OPENPIC_OUTPUT_NB); 1618 for (j = 0; j < OPENPIC_OUTPUT_NB; j++) { 1619 sysbus_init_irq(d, &opp->dst[i].irqs[j]); 1620 } 1621 1622 opp->dst[i].raised.queue_size = IRQQUEUE_SIZE_BITS; 1623 opp->dst[i].raised.queue = bitmap_new(IRQQUEUE_SIZE_BITS); 1624 opp->dst[i].servicing.queue_size = IRQQUEUE_SIZE_BITS; 1625 opp->dst[i].servicing.queue = bitmap_new(IRQQUEUE_SIZE_BITS); 1626 } 1627 1628 sysbus_init_mmio(d, &opp->mem); 1629 qdev_init_gpio_in(dev, openpic_set_irq, opp->max_irq); 1630 } 1631 1632 static Property openpic_properties[] = { 1633 DEFINE_PROP_UINT32("model", OpenPICState, model, OPENPIC_MODEL_FSL_MPIC_20), 1634 DEFINE_PROP_UINT32("nb_cpus", OpenPICState, nb_cpus, 1), 1635 DEFINE_PROP_END_OF_LIST(), 1636 }; 1637 1638 static void openpic_class_init(ObjectClass *oc, void *data) 1639 { 1640 DeviceClass *dc = DEVICE_CLASS(oc); 1641 1642 dc->realize = openpic_realize; 1643 dc->props = openpic_properties; 1644 dc->reset = openpic_reset; 1645 dc->vmsd = &vmstate_openpic; 1646 } 1647 1648 static const TypeInfo openpic_info = { 1649 .name = TYPE_OPENPIC, 1650 .parent = TYPE_SYS_BUS_DEVICE, 1651 .instance_size = sizeof(OpenPICState), 1652 .instance_init = openpic_init, 1653 .class_init = openpic_class_init, 1654 }; 1655 1656 static void openpic_register_types(void) 1657 { 1658 type_register_static(&openpic_info); 1659 } 1660 1661 type_init(openpic_register_types) 1662