1 /* 2 * RISC-V APLIC (Advanced Platform Level Interrupt Controller) 3 * 4 * Copyright (c) 2021 Western Digital Corporation or its affiliates. 5 * 6 * This program is free software; you can redistribute it and/or modify it 7 * under the terms and conditions of the GNU General Public License, 8 * version 2 or later, as published by the Free Software Foundation. 9 * 10 * This program is distributed in the hope it will be useful, but WITHOUT 11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 13 * more details. 14 * 15 * You should have received a copy of the GNU General Public License along with 16 * this program. If not, see <http://www.gnu.org/licenses/>. 17 */ 18 19 #include "qemu/osdep.h" 20 #include "qapi/error.h" 21 #include "qemu/log.h" 22 #include "qemu/module.h" 23 #include "qemu/error-report.h" 24 #include "qemu/bswap.h" 25 #include "exec/address-spaces.h" 26 #include "hw/sysbus.h" 27 #include "hw/pci/msi.h" 28 #include "hw/boards.h" 29 #include "hw/qdev-properties.h" 30 #include "hw/intc/riscv_aplic.h" 31 #include "hw/irq.h" 32 #include "target/riscv/cpu.h" 33 #include "sysemu/sysemu.h" 34 #include "migration/vmstate.h" 35 36 #define APLIC_MAX_IDC (1UL << 14) 37 #define APLIC_MAX_SOURCE 1024 38 #define APLIC_MIN_IPRIO_BITS 1 39 #define APLIC_MAX_IPRIO_BITS 8 40 #define APLIC_MAX_CHILDREN 1024 41 42 #define APLIC_DOMAINCFG 0x0000 43 #define APLIC_DOMAINCFG_RDONLY 0x80000000 44 #define APLIC_DOMAINCFG_IE (1 << 8) 45 #define APLIC_DOMAINCFG_DM (1 << 2) 46 #define APLIC_DOMAINCFG_BE (1 << 0) 47 48 #define APLIC_SOURCECFG_BASE 0x0004 49 #define APLIC_SOURCECFG_D (1 << 10) 50 #define APLIC_SOURCECFG_CHILDIDX_MASK 0x000003ff 51 #define APLIC_SOURCECFG_SM_MASK 0x00000007 52 #define APLIC_SOURCECFG_SM_INACTIVE 0x0 53 #define APLIC_SOURCECFG_SM_DETACH 0x1 54 #define APLIC_SOURCECFG_SM_EDGE_RISE 0x4 55 #define APLIC_SOURCECFG_SM_EDGE_FALL 0x5 56 #define APLIC_SOURCECFG_SM_LEVEL_HIGH 0x6 57 #define APLIC_SOURCECFG_SM_LEVEL_LOW 0x7 58 59 #define APLIC_MMSICFGADDR 0x1bc0 60 #define APLIC_MMSICFGADDRH 0x1bc4 61 #define APLIC_SMSICFGADDR 0x1bc8 62 #define APLIC_SMSICFGADDRH 0x1bcc 63 64 #define APLIC_xMSICFGADDRH_L (1UL << 31) 65 #define APLIC_xMSICFGADDRH_HHXS_MASK 0x1f 66 #define APLIC_xMSICFGADDRH_HHXS_SHIFT 24 67 #define APLIC_xMSICFGADDRH_LHXS_MASK 0x7 68 #define APLIC_xMSICFGADDRH_LHXS_SHIFT 20 69 #define APLIC_xMSICFGADDRH_HHXW_MASK 0x7 70 #define APLIC_xMSICFGADDRH_HHXW_SHIFT 16 71 #define APLIC_xMSICFGADDRH_LHXW_MASK 0xf 72 #define APLIC_xMSICFGADDRH_LHXW_SHIFT 12 73 #define APLIC_xMSICFGADDRH_BAPPN_MASK 0xfff 74 75 #define APLIC_xMSICFGADDR_PPN_SHIFT 12 76 77 #define APLIC_xMSICFGADDR_PPN_HART(__lhxs) \ 78 ((1UL << (__lhxs)) - 1) 79 80 #define APLIC_xMSICFGADDR_PPN_LHX_MASK(__lhxw) \ 81 ((1UL << (__lhxw)) - 1) 82 #define APLIC_xMSICFGADDR_PPN_LHX_SHIFT(__lhxs) \ 83 ((__lhxs)) 84 #define APLIC_xMSICFGADDR_PPN_LHX(__lhxw, __lhxs) \ 85 (APLIC_xMSICFGADDR_PPN_LHX_MASK(__lhxw) << \ 86 APLIC_xMSICFGADDR_PPN_LHX_SHIFT(__lhxs)) 87 88 #define APLIC_xMSICFGADDR_PPN_HHX_MASK(__hhxw) \ 89 ((1UL << (__hhxw)) - 1) 90 #define APLIC_xMSICFGADDR_PPN_HHX_SHIFT(__hhxs) \ 91 ((__hhxs) + APLIC_xMSICFGADDR_PPN_SHIFT) 92 #define APLIC_xMSICFGADDR_PPN_HHX(__hhxw, __hhxs) \ 93 (APLIC_xMSICFGADDR_PPN_HHX_MASK(__hhxw) << \ 94 APLIC_xMSICFGADDR_PPN_HHX_SHIFT(__hhxs)) 95 96 #define APLIC_xMSICFGADDRH_VALID_MASK \ 97 (APLIC_xMSICFGADDRH_L | \ 98 (APLIC_xMSICFGADDRH_HHXS_MASK << APLIC_xMSICFGADDRH_HHXS_SHIFT) | \ 99 (APLIC_xMSICFGADDRH_LHXS_MASK << APLIC_xMSICFGADDRH_LHXS_SHIFT) | \ 100 (APLIC_xMSICFGADDRH_HHXW_MASK << APLIC_xMSICFGADDRH_HHXW_SHIFT) | \ 101 (APLIC_xMSICFGADDRH_LHXW_MASK << APLIC_xMSICFGADDRH_LHXW_SHIFT) | \ 102 APLIC_xMSICFGADDRH_BAPPN_MASK) 103 104 #define APLIC_SETIP_BASE 0x1c00 105 #define APLIC_SETIPNUM 0x1cdc 106 107 #define APLIC_CLRIP_BASE 0x1d00 108 #define APLIC_CLRIPNUM 0x1ddc 109 110 #define APLIC_SETIE_BASE 0x1e00 111 #define APLIC_SETIENUM 0x1edc 112 113 #define APLIC_CLRIE_BASE 0x1f00 114 #define APLIC_CLRIENUM 0x1fdc 115 116 #define APLIC_SETIPNUM_LE 0x2000 117 #define APLIC_SETIPNUM_BE 0x2004 118 119 #define APLIC_ISTATE_PENDING (1U << 0) 120 #define APLIC_ISTATE_ENABLED (1U << 1) 121 #define APLIC_ISTATE_ENPEND (APLIC_ISTATE_ENABLED | \ 122 APLIC_ISTATE_PENDING) 123 #define APLIC_ISTATE_INPUT (1U << 8) 124 125 #define APLIC_GENMSI 0x3000 126 127 #define APLIC_TARGET_BASE 0x3004 128 #define APLIC_TARGET_HART_IDX_SHIFT 18 129 #define APLIC_TARGET_HART_IDX_MASK 0x3fff 130 #define APLIC_TARGET_GUEST_IDX_SHIFT 12 131 #define APLIC_TARGET_GUEST_IDX_MASK 0x3f 132 #define APLIC_TARGET_IPRIO_MASK 0xff 133 #define APLIC_TARGET_EIID_MASK 0x7ff 134 135 #define APLIC_IDC_BASE 0x4000 136 #define APLIC_IDC_SIZE 32 137 138 #define APLIC_IDC_IDELIVERY 0x00 139 140 #define APLIC_IDC_IFORCE 0x04 141 142 #define APLIC_IDC_ITHRESHOLD 0x08 143 144 #define APLIC_IDC_TOPI 0x18 145 #define APLIC_IDC_TOPI_ID_SHIFT 16 146 #define APLIC_IDC_TOPI_ID_MASK 0x3ff 147 #define APLIC_IDC_TOPI_PRIO_MASK 0xff 148 149 #define APLIC_IDC_CLAIMI 0x1c 150 151 static uint32_t riscv_aplic_read_input_word(RISCVAPLICState *aplic, 152 uint32_t word) 153 { 154 uint32_t i, irq, ret = 0; 155 156 for (i = 0; i < 32; i++) { 157 irq = word * 32 + i; 158 if (!irq || aplic->num_irqs <= irq) { 159 continue; 160 } 161 162 ret |= ((aplic->state[irq] & APLIC_ISTATE_INPUT) ? 1 : 0) << i; 163 } 164 165 return ret; 166 } 167 168 static uint32_t riscv_aplic_read_pending_word(RISCVAPLICState *aplic, 169 uint32_t word) 170 { 171 uint32_t i, irq, ret = 0; 172 173 for (i = 0; i < 32; i++) { 174 irq = word * 32 + i; 175 if (!irq || aplic->num_irqs <= irq) { 176 continue; 177 } 178 179 ret |= ((aplic->state[irq] & APLIC_ISTATE_PENDING) ? 1 : 0) << i; 180 } 181 182 return ret; 183 } 184 185 static void riscv_aplic_set_pending_raw(RISCVAPLICState *aplic, 186 uint32_t irq, bool pending) 187 { 188 if (pending) { 189 aplic->state[irq] |= APLIC_ISTATE_PENDING; 190 } else { 191 aplic->state[irq] &= ~APLIC_ISTATE_PENDING; 192 } 193 } 194 195 static void riscv_aplic_set_pending(RISCVAPLICState *aplic, 196 uint32_t irq, bool pending) 197 { 198 uint32_t sourcecfg, sm; 199 200 if ((irq <= 0) || (aplic->num_irqs <= irq)) { 201 return; 202 } 203 204 sourcecfg = aplic->sourcecfg[irq]; 205 if (sourcecfg & APLIC_SOURCECFG_D) { 206 return; 207 } 208 209 sm = sourcecfg & APLIC_SOURCECFG_SM_MASK; 210 if ((sm == APLIC_SOURCECFG_SM_INACTIVE) || 211 ((!aplic->msimode || (aplic->msimode && !pending)) && 212 ((sm == APLIC_SOURCECFG_SM_LEVEL_HIGH) || 213 (sm == APLIC_SOURCECFG_SM_LEVEL_LOW)))) { 214 return; 215 } 216 217 riscv_aplic_set_pending_raw(aplic, irq, pending); 218 } 219 220 static void riscv_aplic_set_pending_word(RISCVAPLICState *aplic, 221 uint32_t word, uint32_t value, 222 bool pending) 223 { 224 uint32_t i, irq; 225 226 for (i = 0; i < 32; i++) { 227 irq = word * 32 + i; 228 if (!irq || aplic->num_irqs <= irq) { 229 continue; 230 } 231 232 if (value & (1U << i)) { 233 riscv_aplic_set_pending(aplic, irq, pending); 234 } 235 } 236 } 237 238 static uint32_t riscv_aplic_read_enabled_word(RISCVAPLICState *aplic, 239 int word) 240 { 241 uint32_t i, irq, ret = 0; 242 243 for (i = 0; i < 32; i++) { 244 irq = word * 32 + i; 245 if (!irq || aplic->num_irqs <= irq) { 246 continue; 247 } 248 249 ret |= ((aplic->state[irq] & APLIC_ISTATE_ENABLED) ? 1 : 0) << i; 250 } 251 252 return ret; 253 } 254 255 static void riscv_aplic_set_enabled_raw(RISCVAPLICState *aplic, 256 uint32_t irq, bool enabled) 257 { 258 if (enabled) { 259 aplic->state[irq] |= APLIC_ISTATE_ENABLED; 260 } else { 261 aplic->state[irq] &= ~APLIC_ISTATE_ENABLED; 262 } 263 } 264 265 static void riscv_aplic_set_enabled(RISCVAPLICState *aplic, 266 uint32_t irq, bool enabled) 267 { 268 uint32_t sourcecfg, sm; 269 270 if ((irq <= 0) || (aplic->num_irqs <= irq)) { 271 return; 272 } 273 274 sourcecfg = aplic->sourcecfg[irq]; 275 if (sourcecfg & APLIC_SOURCECFG_D) { 276 return; 277 } 278 279 sm = sourcecfg & APLIC_SOURCECFG_SM_MASK; 280 if (sm == APLIC_SOURCECFG_SM_INACTIVE) { 281 return; 282 } 283 284 riscv_aplic_set_enabled_raw(aplic, irq, enabled); 285 } 286 287 static void riscv_aplic_set_enabled_word(RISCVAPLICState *aplic, 288 uint32_t word, uint32_t value, 289 bool enabled) 290 { 291 uint32_t i, irq; 292 293 for (i = 0; i < 32; i++) { 294 irq = word * 32 + i; 295 if (!irq || aplic->num_irqs <= irq) { 296 continue; 297 } 298 299 if (value & (1U << i)) { 300 riscv_aplic_set_enabled(aplic, irq, enabled); 301 } 302 } 303 } 304 305 static void riscv_aplic_msi_send(RISCVAPLICState *aplic, 306 uint32_t hart_idx, uint32_t guest_idx, 307 uint32_t eiid) 308 { 309 uint64_t addr; 310 MemTxResult result; 311 RISCVAPLICState *aplic_m; 312 uint32_t lhxs, lhxw, hhxs, hhxw, group_idx, msicfgaddr, msicfgaddrH; 313 314 aplic_m = aplic; 315 while (aplic_m && !aplic_m->mmode) { 316 aplic_m = aplic_m->parent; 317 } 318 if (!aplic_m) { 319 qemu_log_mask(LOG_GUEST_ERROR, "%s: m-level APLIC not found\n", 320 __func__); 321 return; 322 } 323 324 if (aplic->mmode) { 325 msicfgaddr = aplic_m->mmsicfgaddr; 326 msicfgaddrH = aplic_m->mmsicfgaddrH; 327 } else { 328 msicfgaddr = aplic_m->smsicfgaddr; 329 msicfgaddrH = aplic_m->smsicfgaddrH; 330 } 331 332 lhxs = (msicfgaddrH >> APLIC_xMSICFGADDRH_LHXS_SHIFT) & 333 APLIC_xMSICFGADDRH_LHXS_MASK; 334 lhxw = (msicfgaddrH >> APLIC_xMSICFGADDRH_LHXW_SHIFT) & 335 APLIC_xMSICFGADDRH_LHXW_MASK; 336 hhxs = (msicfgaddrH >> APLIC_xMSICFGADDRH_HHXS_SHIFT) & 337 APLIC_xMSICFGADDRH_HHXS_MASK; 338 hhxw = (msicfgaddrH >> APLIC_xMSICFGADDRH_HHXW_SHIFT) & 339 APLIC_xMSICFGADDRH_HHXW_MASK; 340 341 group_idx = hart_idx >> lhxw; 342 hart_idx &= APLIC_xMSICFGADDR_PPN_LHX_MASK(lhxw); 343 344 addr = msicfgaddr; 345 addr |= ((uint64_t)(msicfgaddrH & APLIC_xMSICFGADDRH_BAPPN_MASK)) << 32; 346 addr |= ((uint64_t)(group_idx & APLIC_xMSICFGADDR_PPN_HHX_MASK(hhxw))) << 347 APLIC_xMSICFGADDR_PPN_HHX_SHIFT(hhxs); 348 addr |= ((uint64_t)(hart_idx & APLIC_xMSICFGADDR_PPN_LHX_MASK(lhxw))) << 349 APLIC_xMSICFGADDR_PPN_LHX_SHIFT(lhxs); 350 addr |= (uint64_t)(guest_idx & APLIC_xMSICFGADDR_PPN_HART(lhxs)); 351 addr <<= APLIC_xMSICFGADDR_PPN_SHIFT; 352 353 address_space_stl_le(&address_space_memory, addr, 354 eiid, MEMTXATTRS_UNSPECIFIED, &result); 355 if (result != MEMTX_OK) { 356 qemu_log_mask(LOG_GUEST_ERROR, "%s: MSI write failed for " 357 "hart_index=%d guest_index=%d eiid=%d\n", 358 __func__, hart_idx, guest_idx, eiid); 359 } 360 } 361 362 static void riscv_aplic_msi_irq_update(RISCVAPLICState *aplic, uint32_t irq) 363 { 364 uint32_t hart_idx, guest_idx, eiid; 365 366 if (!aplic->msimode || (aplic->num_irqs <= irq) || 367 !(aplic->domaincfg & APLIC_DOMAINCFG_IE)) { 368 return; 369 } 370 371 if ((aplic->state[irq] & APLIC_ISTATE_ENPEND) != APLIC_ISTATE_ENPEND) { 372 return; 373 } 374 375 riscv_aplic_set_pending_raw(aplic, irq, false); 376 377 hart_idx = aplic->target[irq] >> APLIC_TARGET_HART_IDX_SHIFT; 378 hart_idx &= APLIC_TARGET_HART_IDX_MASK; 379 if (aplic->mmode) { 380 /* M-level APLIC ignores guest_index */ 381 guest_idx = 0; 382 } else { 383 guest_idx = aplic->target[irq] >> APLIC_TARGET_GUEST_IDX_SHIFT; 384 guest_idx &= APLIC_TARGET_GUEST_IDX_MASK; 385 } 386 eiid = aplic->target[irq] & APLIC_TARGET_EIID_MASK; 387 riscv_aplic_msi_send(aplic, hart_idx, guest_idx, eiid); 388 } 389 390 static uint32_t riscv_aplic_idc_topi(RISCVAPLICState *aplic, uint32_t idc) 391 { 392 uint32_t best_irq, best_iprio; 393 uint32_t irq, iprio, ihartidx, ithres; 394 395 if (aplic->num_harts <= idc) { 396 return 0; 397 } 398 399 ithres = aplic->ithreshold[idc]; 400 best_irq = best_iprio = UINT32_MAX; 401 for (irq = 1; irq < aplic->num_irqs; irq++) { 402 if ((aplic->state[irq] & APLIC_ISTATE_ENPEND) != 403 APLIC_ISTATE_ENPEND) { 404 continue; 405 } 406 407 ihartidx = aplic->target[irq] >> APLIC_TARGET_HART_IDX_SHIFT; 408 ihartidx &= APLIC_TARGET_HART_IDX_MASK; 409 if (ihartidx != idc) { 410 continue; 411 } 412 413 iprio = aplic->target[irq] & aplic->iprio_mask; 414 if (ithres && iprio >= ithres) { 415 continue; 416 } 417 418 if (iprio < best_iprio) { 419 best_irq = irq; 420 best_iprio = iprio; 421 } 422 } 423 424 if (best_irq < aplic->num_irqs && best_iprio <= aplic->iprio_mask) { 425 return (best_irq << APLIC_IDC_TOPI_ID_SHIFT) | best_iprio; 426 } 427 428 return 0; 429 } 430 431 static void riscv_aplic_idc_update(RISCVAPLICState *aplic, uint32_t idc) 432 { 433 uint32_t topi; 434 435 if (aplic->msimode || aplic->num_harts <= idc) { 436 return; 437 } 438 439 topi = riscv_aplic_idc_topi(aplic, idc); 440 if ((aplic->domaincfg & APLIC_DOMAINCFG_IE) && 441 aplic->idelivery[idc] && 442 (aplic->iforce[idc] || topi)) { 443 qemu_irq_raise(aplic->external_irqs[idc]); 444 } else { 445 qemu_irq_lower(aplic->external_irqs[idc]); 446 } 447 } 448 449 static uint32_t riscv_aplic_idc_claimi(RISCVAPLICState *aplic, uint32_t idc) 450 { 451 uint32_t irq, state, sm, topi = riscv_aplic_idc_topi(aplic, idc); 452 453 if (!topi) { 454 aplic->iforce[idc] = 0; 455 return 0; 456 } 457 458 irq = (topi >> APLIC_IDC_TOPI_ID_SHIFT) & APLIC_IDC_TOPI_ID_MASK; 459 sm = aplic->sourcecfg[irq] & APLIC_SOURCECFG_SM_MASK; 460 state = aplic->state[irq]; 461 riscv_aplic_set_pending_raw(aplic, irq, false); 462 if ((sm == APLIC_SOURCECFG_SM_LEVEL_HIGH) && 463 (state & APLIC_ISTATE_INPUT)) { 464 riscv_aplic_set_pending_raw(aplic, irq, true); 465 } else if ((sm == APLIC_SOURCECFG_SM_LEVEL_LOW) && 466 !(state & APLIC_ISTATE_INPUT)) { 467 riscv_aplic_set_pending_raw(aplic, irq, true); 468 } 469 riscv_aplic_idc_update(aplic, idc); 470 471 return topi; 472 } 473 474 static void riscv_aplic_request(void *opaque, int irq, int level) 475 { 476 bool update = false; 477 RISCVAPLICState *aplic = opaque; 478 uint32_t sourcecfg, childidx, state, idc; 479 480 assert((0 < irq) && (irq < aplic->num_irqs)); 481 482 sourcecfg = aplic->sourcecfg[irq]; 483 if (sourcecfg & APLIC_SOURCECFG_D) { 484 childidx = sourcecfg & APLIC_SOURCECFG_CHILDIDX_MASK; 485 if (childidx < aplic->num_children) { 486 riscv_aplic_request(aplic->children[childidx], irq, level); 487 } 488 return; 489 } 490 491 state = aplic->state[irq]; 492 switch (sourcecfg & APLIC_SOURCECFG_SM_MASK) { 493 case APLIC_SOURCECFG_SM_EDGE_RISE: 494 if ((level > 0) && !(state & APLIC_ISTATE_INPUT) && 495 !(state & APLIC_ISTATE_PENDING)) { 496 riscv_aplic_set_pending_raw(aplic, irq, true); 497 update = true; 498 } 499 break; 500 case APLIC_SOURCECFG_SM_EDGE_FALL: 501 if ((level <= 0) && (state & APLIC_ISTATE_INPUT) && 502 !(state & APLIC_ISTATE_PENDING)) { 503 riscv_aplic_set_pending_raw(aplic, irq, true); 504 update = true; 505 } 506 break; 507 case APLIC_SOURCECFG_SM_LEVEL_HIGH: 508 if ((level > 0) && !(state & APLIC_ISTATE_PENDING)) { 509 riscv_aplic_set_pending_raw(aplic, irq, true); 510 update = true; 511 } 512 break; 513 case APLIC_SOURCECFG_SM_LEVEL_LOW: 514 if ((level <= 0) && !(state & APLIC_ISTATE_PENDING)) { 515 riscv_aplic_set_pending_raw(aplic, irq, true); 516 update = true; 517 } 518 break; 519 default: 520 break; 521 } 522 523 if (level <= 0) { 524 aplic->state[irq] &= ~APLIC_ISTATE_INPUT; 525 } else { 526 aplic->state[irq] |= APLIC_ISTATE_INPUT; 527 } 528 529 if (update) { 530 if (aplic->msimode) { 531 riscv_aplic_msi_irq_update(aplic, irq); 532 } else { 533 idc = aplic->target[irq] >> APLIC_TARGET_HART_IDX_SHIFT; 534 idc &= APLIC_TARGET_HART_IDX_MASK; 535 riscv_aplic_idc_update(aplic, idc); 536 } 537 } 538 } 539 540 static uint64_t riscv_aplic_read(void *opaque, hwaddr addr, unsigned size) 541 { 542 uint32_t irq, word, idc; 543 RISCVAPLICState *aplic = opaque; 544 545 /* Reads must be 4 byte words */ 546 if ((addr & 0x3) != 0) { 547 goto err; 548 } 549 550 if (addr == APLIC_DOMAINCFG) { 551 return APLIC_DOMAINCFG_RDONLY | aplic->domaincfg | 552 (aplic->msimode ? APLIC_DOMAINCFG_DM : 0); 553 } else if ((APLIC_SOURCECFG_BASE <= addr) && 554 (addr < (APLIC_SOURCECFG_BASE + (aplic->num_irqs - 1) * 4))) { 555 irq = ((addr - APLIC_SOURCECFG_BASE) >> 2) + 1; 556 return aplic->sourcecfg[irq]; 557 } else if (aplic->mmode && aplic->msimode && 558 (addr == APLIC_MMSICFGADDR)) { 559 return aplic->mmsicfgaddr; 560 } else if (aplic->mmode && aplic->msimode && 561 (addr == APLIC_MMSICFGADDRH)) { 562 return aplic->mmsicfgaddrH; 563 } else if (aplic->mmode && aplic->msimode && 564 (addr == APLIC_SMSICFGADDR)) { 565 /* 566 * Registers SMSICFGADDR and SMSICFGADDRH are implemented only if: 567 * (a) the interrupt domain is at machine level 568 * (b) the domain's harts implement supervisor mode 569 * (c) the domain has one or more child supervisor-level domains 570 * that support MSI delivery mode (domaincfg.DM is not read- 571 * only zero in at least one of the supervisor-level child 572 * domains). 573 */ 574 return (aplic->num_children) ? aplic->smsicfgaddr : 0; 575 } else if (aplic->mmode && aplic->msimode && 576 (addr == APLIC_SMSICFGADDRH)) { 577 return (aplic->num_children) ? aplic->smsicfgaddrH : 0; 578 } else if ((APLIC_SETIP_BASE <= addr) && 579 (addr < (APLIC_SETIP_BASE + aplic->bitfield_words * 4))) { 580 word = (addr - APLIC_SETIP_BASE) >> 2; 581 return riscv_aplic_read_pending_word(aplic, word); 582 } else if (addr == APLIC_SETIPNUM) { 583 return 0; 584 } else if ((APLIC_CLRIP_BASE <= addr) && 585 (addr < (APLIC_CLRIP_BASE + aplic->bitfield_words * 4))) { 586 word = (addr - APLIC_CLRIP_BASE) >> 2; 587 return riscv_aplic_read_input_word(aplic, word); 588 } else if (addr == APLIC_CLRIPNUM) { 589 return 0; 590 } else if ((APLIC_SETIE_BASE <= addr) && 591 (addr < (APLIC_SETIE_BASE + aplic->bitfield_words * 4))) { 592 word = (addr - APLIC_SETIE_BASE) >> 2; 593 return riscv_aplic_read_enabled_word(aplic, word); 594 } else if (addr == APLIC_SETIENUM) { 595 return 0; 596 } else if ((APLIC_CLRIE_BASE <= addr) && 597 (addr < (APLIC_CLRIE_BASE + aplic->bitfield_words * 4))) { 598 return 0; 599 } else if (addr == APLIC_CLRIENUM) { 600 return 0; 601 } else if (addr == APLIC_SETIPNUM_LE) { 602 return 0; 603 } else if (addr == APLIC_SETIPNUM_BE) { 604 return 0; 605 } else if (addr == APLIC_GENMSI) { 606 return (aplic->msimode) ? aplic->genmsi : 0; 607 } else if ((APLIC_TARGET_BASE <= addr) && 608 (addr < (APLIC_TARGET_BASE + (aplic->num_irqs - 1) * 4))) { 609 irq = ((addr - APLIC_TARGET_BASE) >> 2) + 1; 610 return aplic->target[irq]; 611 } else if (!aplic->msimode && (APLIC_IDC_BASE <= addr) && 612 (addr < (APLIC_IDC_BASE + aplic->num_harts * APLIC_IDC_SIZE))) { 613 idc = (addr - APLIC_IDC_BASE) / APLIC_IDC_SIZE; 614 switch (addr - (APLIC_IDC_BASE + idc * APLIC_IDC_SIZE)) { 615 case APLIC_IDC_IDELIVERY: 616 return aplic->idelivery[idc]; 617 case APLIC_IDC_IFORCE: 618 return aplic->iforce[idc]; 619 case APLIC_IDC_ITHRESHOLD: 620 return aplic->ithreshold[idc]; 621 case APLIC_IDC_TOPI: 622 return riscv_aplic_idc_topi(aplic, idc); 623 case APLIC_IDC_CLAIMI: 624 return riscv_aplic_idc_claimi(aplic, idc); 625 default: 626 goto err; 627 }; 628 } 629 630 err: 631 qemu_log_mask(LOG_GUEST_ERROR, 632 "%s: Invalid register read 0x%" HWADDR_PRIx "\n", 633 __func__, addr); 634 return 0; 635 } 636 637 static void riscv_aplic_write(void *opaque, hwaddr addr, uint64_t value, 638 unsigned size) 639 { 640 RISCVAPLICState *aplic = opaque; 641 uint32_t irq, word, idc = UINT32_MAX; 642 643 /* Writes must be 4 byte words */ 644 if ((addr & 0x3) != 0) { 645 goto err; 646 } 647 648 if (addr == APLIC_DOMAINCFG) { 649 /* Only IE bit writable at the moment */ 650 value &= APLIC_DOMAINCFG_IE; 651 aplic->domaincfg = value; 652 } else if ((APLIC_SOURCECFG_BASE <= addr) && 653 (addr < (APLIC_SOURCECFG_BASE + (aplic->num_irqs - 1) * 4))) { 654 irq = ((addr - APLIC_SOURCECFG_BASE) >> 2) + 1; 655 if (!aplic->num_children && (value & APLIC_SOURCECFG_D)) { 656 value = 0; 657 } 658 if (value & APLIC_SOURCECFG_D) { 659 value &= (APLIC_SOURCECFG_D | APLIC_SOURCECFG_CHILDIDX_MASK); 660 } else { 661 value &= (APLIC_SOURCECFG_D | APLIC_SOURCECFG_SM_MASK); 662 } 663 aplic->sourcecfg[irq] = value; 664 if ((aplic->sourcecfg[irq] & APLIC_SOURCECFG_D) || 665 (aplic->sourcecfg[irq] == 0)) { 666 riscv_aplic_set_pending_raw(aplic, irq, false); 667 riscv_aplic_set_enabled_raw(aplic, irq, false); 668 } 669 } else if (aplic->mmode && aplic->msimode && 670 (addr == APLIC_MMSICFGADDR)) { 671 if (!(aplic->mmsicfgaddrH & APLIC_xMSICFGADDRH_L)) { 672 aplic->mmsicfgaddr = value; 673 } 674 } else if (aplic->mmode && aplic->msimode && 675 (addr == APLIC_MMSICFGADDRH)) { 676 if (!(aplic->mmsicfgaddrH & APLIC_xMSICFGADDRH_L)) { 677 aplic->mmsicfgaddrH = value & APLIC_xMSICFGADDRH_VALID_MASK; 678 } 679 } else if (aplic->mmode && aplic->msimode && 680 (addr == APLIC_SMSICFGADDR)) { 681 /* 682 * Registers SMSICFGADDR and SMSICFGADDRH are implemented only if: 683 * (a) the interrupt domain is at machine level 684 * (b) the domain's harts implement supervisor mode 685 * (c) the domain has one or more child supervisor-level domains 686 * that support MSI delivery mode (domaincfg.DM is not read- 687 * only zero in at least one of the supervisor-level child 688 * domains). 689 */ 690 if (aplic->num_children && 691 !(aplic->mmsicfgaddrH & APLIC_xMSICFGADDRH_L)) { 692 aplic->smsicfgaddr = value; 693 } 694 } else if (aplic->mmode && aplic->msimode && 695 (addr == APLIC_SMSICFGADDRH)) { 696 if (aplic->num_children && 697 !(aplic->mmsicfgaddrH & APLIC_xMSICFGADDRH_L)) { 698 aplic->smsicfgaddrH = value & APLIC_xMSICFGADDRH_VALID_MASK; 699 } 700 } else if ((APLIC_SETIP_BASE <= addr) && 701 (addr < (APLIC_SETIP_BASE + aplic->bitfield_words * 4))) { 702 word = (addr - APLIC_SETIP_BASE) >> 2; 703 riscv_aplic_set_pending_word(aplic, word, value, true); 704 } else if (addr == APLIC_SETIPNUM) { 705 riscv_aplic_set_pending(aplic, value, true); 706 } else if ((APLIC_CLRIP_BASE <= addr) && 707 (addr < (APLIC_CLRIP_BASE + aplic->bitfield_words * 4))) { 708 word = (addr - APLIC_CLRIP_BASE) >> 2; 709 riscv_aplic_set_pending_word(aplic, word, value, false); 710 } else if (addr == APLIC_CLRIPNUM) { 711 riscv_aplic_set_pending(aplic, value, false); 712 } else if ((APLIC_SETIE_BASE <= addr) && 713 (addr < (APLIC_SETIE_BASE + aplic->bitfield_words * 4))) { 714 word = (addr - APLIC_SETIE_BASE) >> 2; 715 riscv_aplic_set_enabled_word(aplic, word, value, true); 716 } else if (addr == APLIC_SETIENUM) { 717 riscv_aplic_set_enabled(aplic, value, true); 718 } else if ((APLIC_CLRIE_BASE <= addr) && 719 (addr < (APLIC_CLRIE_BASE + aplic->bitfield_words * 4))) { 720 word = (addr - APLIC_CLRIE_BASE) >> 2; 721 riscv_aplic_set_enabled_word(aplic, word, value, false); 722 } else if (addr == APLIC_CLRIENUM) { 723 riscv_aplic_set_enabled(aplic, value, false); 724 } else if (addr == APLIC_SETIPNUM_LE) { 725 riscv_aplic_set_pending(aplic, value, true); 726 } else if (addr == APLIC_SETIPNUM_BE) { 727 riscv_aplic_set_pending(aplic, bswap32(value), true); 728 } else if (addr == APLIC_GENMSI) { 729 if (aplic->msimode) { 730 aplic->genmsi = value & ~(APLIC_TARGET_GUEST_IDX_MASK << 731 APLIC_TARGET_GUEST_IDX_SHIFT); 732 riscv_aplic_msi_send(aplic, 733 value >> APLIC_TARGET_HART_IDX_SHIFT, 734 0, 735 value & APLIC_TARGET_EIID_MASK); 736 } 737 } else if ((APLIC_TARGET_BASE <= addr) && 738 (addr < (APLIC_TARGET_BASE + (aplic->num_irqs - 1) * 4))) { 739 irq = ((addr - APLIC_TARGET_BASE) >> 2) + 1; 740 if (aplic->msimode) { 741 aplic->target[irq] = value; 742 } else { 743 aplic->target[irq] = (value & ~APLIC_TARGET_IPRIO_MASK) | 744 ((value & aplic->iprio_mask) ? 745 (value & aplic->iprio_mask) : 1); 746 } 747 } else if (!aplic->msimode && (APLIC_IDC_BASE <= addr) && 748 (addr < (APLIC_IDC_BASE + aplic->num_harts * APLIC_IDC_SIZE))) { 749 idc = (addr - APLIC_IDC_BASE) / APLIC_IDC_SIZE; 750 switch (addr - (APLIC_IDC_BASE + idc * APLIC_IDC_SIZE)) { 751 case APLIC_IDC_IDELIVERY: 752 aplic->idelivery[idc] = value & 0x1; 753 break; 754 case APLIC_IDC_IFORCE: 755 aplic->iforce[idc] = value & 0x1; 756 break; 757 case APLIC_IDC_ITHRESHOLD: 758 aplic->ithreshold[idc] = value & aplic->iprio_mask; 759 break; 760 default: 761 goto err; 762 }; 763 } else { 764 goto err; 765 } 766 767 if (aplic->msimode) { 768 for (irq = 1; irq < aplic->num_irqs; irq++) { 769 riscv_aplic_msi_irq_update(aplic, irq); 770 } 771 } else { 772 if (idc == UINT32_MAX) { 773 for (idc = 0; idc < aplic->num_harts; idc++) { 774 riscv_aplic_idc_update(aplic, idc); 775 } 776 } else { 777 riscv_aplic_idc_update(aplic, idc); 778 } 779 } 780 781 return; 782 783 err: 784 qemu_log_mask(LOG_GUEST_ERROR, 785 "%s: Invalid register write 0x%" HWADDR_PRIx "\n", 786 __func__, addr); 787 } 788 789 static const MemoryRegionOps riscv_aplic_ops = { 790 .read = riscv_aplic_read, 791 .write = riscv_aplic_write, 792 .endianness = DEVICE_LITTLE_ENDIAN, 793 .valid = { 794 .min_access_size = 4, 795 .max_access_size = 4 796 } 797 }; 798 799 static void riscv_aplic_realize(DeviceState *dev, Error **errp) 800 { 801 uint32_t i; 802 RISCVAPLICState *aplic = RISCV_APLIC(dev); 803 804 aplic->bitfield_words = (aplic->num_irqs + 31) >> 5; 805 aplic->sourcecfg = g_new0(uint32_t, aplic->num_irqs); 806 aplic->state = g_new0(uint32_t, aplic->num_irqs); 807 aplic->target = g_new0(uint32_t, aplic->num_irqs); 808 if (!aplic->msimode) { 809 for (i = 0; i < aplic->num_irqs; i++) { 810 aplic->target[i] = 1; 811 } 812 } 813 aplic->idelivery = g_new0(uint32_t, aplic->num_harts); 814 aplic->iforce = g_new0(uint32_t, aplic->num_harts); 815 aplic->ithreshold = g_new0(uint32_t, aplic->num_harts); 816 817 memory_region_init_io(&aplic->mmio, OBJECT(dev), &riscv_aplic_ops, aplic, 818 TYPE_RISCV_APLIC, aplic->aperture_size); 819 sysbus_init_mmio(SYS_BUS_DEVICE(dev), &aplic->mmio); 820 821 /* 822 * Only root APLICs have hardware IRQ lines. All non-root APLICs 823 * have IRQ lines delegated by their parent APLIC. 824 */ 825 if (!aplic->parent) { 826 qdev_init_gpio_in(dev, riscv_aplic_request, aplic->num_irqs); 827 } 828 829 /* Create output IRQ lines for non-MSI mode */ 830 if (!aplic->msimode) { 831 aplic->external_irqs = g_malloc(sizeof(qemu_irq) * aplic->num_harts); 832 qdev_init_gpio_out(dev, aplic->external_irqs, aplic->num_harts); 833 834 /* Claim the CPU interrupt to be triggered by this APLIC */ 835 for (i = 0; i < aplic->num_harts; i++) { 836 RISCVCPU *cpu = RISCV_CPU(cpu_by_arch_id(aplic->hartid_base + i)); 837 if (riscv_cpu_claim_interrupts(cpu, 838 (aplic->mmode) ? MIP_MEIP : MIP_SEIP) < 0) { 839 error_report("%s already claimed", 840 (aplic->mmode) ? "MEIP" : "SEIP"); 841 exit(1); 842 } 843 } 844 } 845 846 msi_nonbroken = true; 847 } 848 849 static Property riscv_aplic_properties[] = { 850 DEFINE_PROP_UINT32("aperture-size", RISCVAPLICState, aperture_size, 0), 851 DEFINE_PROP_UINT32("hartid-base", RISCVAPLICState, hartid_base, 0), 852 DEFINE_PROP_UINT32("num-harts", RISCVAPLICState, num_harts, 0), 853 DEFINE_PROP_UINT32("iprio-mask", RISCVAPLICState, iprio_mask, 0), 854 DEFINE_PROP_UINT32("num-irqs", RISCVAPLICState, num_irqs, 0), 855 DEFINE_PROP_BOOL("msimode", RISCVAPLICState, msimode, 0), 856 DEFINE_PROP_BOOL("mmode", RISCVAPLICState, mmode, 0), 857 DEFINE_PROP_END_OF_LIST(), 858 }; 859 860 static const VMStateDescription vmstate_riscv_aplic = { 861 .name = "riscv_aplic", 862 .version_id = 1, 863 .minimum_version_id = 1, 864 .fields = (VMStateField[]) { 865 VMSTATE_UINT32(domaincfg, RISCVAPLICState), 866 VMSTATE_UINT32(mmsicfgaddr, RISCVAPLICState), 867 VMSTATE_UINT32(mmsicfgaddrH, RISCVAPLICState), 868 VMSTATE_UINT32(smsicfgaddr, RISCVAPLICState), 869 VMSTATE_UINT32(smsicfgaddrH, RISCVAPLICState), 870 VMSTATE_UINT32(genmsi, RISCVAPLICState), 871 VMSTATE_VARRAY_UINT32(sourcecfg, RISCVAPLICState, 872 num_irqs, 0, 873 vmstate_info_uint32, uint32_t), 874 VMSTATE_VARRAY_UINT32(state, RISCVAPLICState, 875 num_irqs, 0, 876 vmstate_info_uint32, uint32_t), 877 VMSTATE_VARRAY_UINT32(target, RISCVAPLICState, 878 num_irqs, 0, 879 vmstate_info_uint32, uint32_t), 880 VMSTATE_VARRAY_UINT32(idelivery, RISCVAPLICState, 881 num_harts, 0, 882 vmstate_info_uint32, uint32_t), 883 VMSTATE_VARRAY_UINT32(iforce, RISCVAPLICState, 884 num_harts, 0, 885 vmstate_info_uint32, uint32_t), 886 VMSTATE_VARRAY_UINT32(ithreshold, RISCVAPLICState, 887 num_harts, 0, 888 vmstate_info_uint32, uint32_t), 889 VMSTATE_END_OF_LIST() 890 } 891 }; 892 893 static void riscv_aplic_class_init(ObjectClass *klass, void *data) 894 { 895 DeviceClass *dc = DEVICE_CLASS(klass); 896 897 device_class_set_props(dc, riscv_aplic_properties); 898 dc->realize = riscv_aplic_realize; 899 dc->vmsd = &vmstate_riscv_aplic; 900 } 901 902 static const TypeInfo riscv_aplic_info = { 903 .name = TYPE_RISCV_APLIC, 904 .parent = TYPE_SYS_BUS_DEVICE, 905 .instance_size = sizeof(RISCVAPLICState), 906 .class_init = riscv_aplic_class_init, 907 }; 908 909 static void riscv_aplic_register_types(void) 910 { 911 type_register_static(&riscv_aplic_info); 912 } 913 914 type_init(riscv_aplic_register_types) 915 916 /* 917 * Add a APLIC device to another APLIC device as child for 918 * interrupt delegation. 919 */ 920 void riscv_aplic_add_child(DeviceState *parent, DeviceState *child) 921 { 922 RISCVAPLICState *caplic, *paplic; 923 924 assert(parent && child); 925 caplic = RISCV_APLIC(child); 926 paplic = RISCV_APLIC(parent); 927 928 assert(paplic->num_irqs == caplic->num_irqs); 929 assert(paplic->num_children <= QEMU_APLIC_MAX_CHILDREN); 930 931 caplic->parent = paplic; 932 paplic->children[paplic->num_children] = caplic; 933 paplic->num_children++; 934 } 935 936 /* 937 * Create APLIC device. 938 */ 939 DeviceState *riscv_aplic_create(hwaddr addr, hwaddr size, 940 uint32_t hartid_base, uint32_t num_harts, uint32_t num_sources, 941 uint32_t iprio_bits, bool msimode, bool mmode, DeviceState *parent) 942 { 943 DeviceState *dev = qdev_new(TYPE_RISCV_APLIC); 944 uint32_t i; 945 946 assert(num_harts < APLIC_MAX_IDC); 947 assert((APLIC_IDC_BASE + (num_harts * APLIC_IDC_SIZE)) <= size); 948 assert(num_sources < APLIC_MAX_SOURCE); 949 assert(APLIC_MIN_IPRIO_BITS <= iprio_bits); 950 assert(iprio_bits <= APLIC_MAX_IPRIO_BITS); 951 952 qdev_prop_set_uint32(dev, "aperture-size", size); 953 qdev_prop_set_uint32(dev, "hartid-base", hartid_base); 954 qdev_prop_set_uint32(dev, "num-harts", num_harts); 955 qdev_prop_set_uint32(dev, "iprio-mask", ((1U << iprio_bits) - 1)); 956 qdev_prop_set_uint32(dev, "num-irqs", num_sources + 1); 957 qdev_prop_set_bit(dev, "msimode", msimode); 958 qdev_prop_set_bit(dev, "mmode", mmode); 959 960 sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal); 961 sysbus_mmio_map(SYS_BUS_DEVICE(dev), 0, addr); 962 963 if (parent) { 964 riscv_aplic_add_child(parent, dev); 965 } 966 967 if (!msimode) { 968 for (i = 0; i < num_harts; i++) { 969 CPUState *cpu = cpu_by_arch_id(hartid_base + i); 970 971 qdev_connect_gpio_out_named(dev, NULL, i, 972 qdev_get_gpio_in(DEVICE(cpu), 973 (mmode) ? IRQ_M_EXT : IRQ_S_EXT)); 974 } 975 } 976 977 return dev; 978 } 979