1 /* 2 * QEMU RISC-V CPU 3 * 4 * Copyright (c) 2016-2017 Sagar Karandikar, sagark@eecs.berkeley.edu 5 * Copyright (c) 2017-2018 SiFive, Inc. 6 * 7 * This program is free software; you can redistribute it and/or modify it 8 * under the terms and conditions of the GNU General Public License, 9 * version 2 or later, as published by the Free Software Foundation. 10 * 11 * This program is distributed in the hope it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 14 * more details. 15 * 16 * You should have received a copy of the GNU General Public License along with 17 * this program. If not, see <http://www.gnu.org/licenses/>. 18 */ 19 20 #ifndef RISCV_CPU_H 21 #define RISCV_CPU_H 22 23 #include "hw/core/cpu.h" 24 #include "hw/registerfields.h" 25 #include "exec/cpu-defs.h" 26 #include "qemu/cpu-float.h" 27 #include "qom/object.h" 28 #include "qemu/int128.h" 29 #include "cpu_bits.h" 30 #include "qapi/qapi-types-common.h" 31 32 #define TCG_GUEST_DEFAULT_MO 0 33 34 /* 35 * RISC-V-specific extra insn start words: 36 * 1: Original instruction opcode 37 */ 38 #define TARGET_INSN_START_EXTRA_WORDS 1 39 40 #define TYPE_RISCV_CPU "riscv-cpu" 41 42 #define RISCV_CPU_TYPE_SUFFIX "-" TYPE_RISCV_CPU 43 #define RISCV_CPU_TYPE_NAME(name) (name RISCV_CPU_TYPE_SUFFIX) 44 #define CPU_RESOLVING_TYPE TYPE_RISCV_CPU 45 46 #define TYPE_RISCV_CPU_ANY RISCV_CPU_TYPE_NAME("any") 47 #define TYPE_RISCV_CPU_BASE32 RISCV_CPU_TYPE_NAME("rv32") 48 #define TYPE_RISCV_CPU_BASE64 RISCV_CPU_TYPE_NAME("rv64") 49 #define TYPE_RISCV_CPU_BASE128 RISCV_CPU_TYPE_NAME("x-rv128") 50 #define TYPE_RISCV_CPU_IBEX RISCV_CPU_TYPE_NAME("lowrisc-ibex") 51 #define TYPE_RISCV_CPU_SHAKTI_C RISCV_CPU_TYPE_NAME("shakti-c") 52 #define TYPE_RISCV_CPU_SIFIVE_E31 RISCV_CPU_TYPE_NAME("sifive-e31") 53 #define TYPE_RISCV_CPU_SIFIVE_E34 RISCV_CPU_TYPE_NAME("sifive-e34") 54 #define TYPE_RISCV_CPU_SIFIVE_E51 RISCV_CPU_TYPE_NAME("sifive-e51") 55 #define TYPE_RISCV_CPU_SIFIVE_U34 RISCV_CPU_TYPE_NAME("sifive-u34") 56 #define TYPE_RISCV_CPU_SIFIVE_U54 RISCV_CPU_TYPE_NAME("sifive-u54") 57 #define TYPE_RISCV_CPU_THEAD_C906 RISCV_CPU_TYPE_NAME("thead-c906") 58 #define TYPE_RISCV_CPU_HOST RISCV_CPU_TYPE_NAME("host") 59 60 #if defined(TARGET_RISCV32) 61 # define TYPE_RISCV_CPU_BASE TYPE_RISCV_CPU_BASE32 62 #elif defined(TARGET_RISCV64) 63 # define TYPE_RISCV_CPU_BASE TYPE_RISCV_CPU_BASE64 64 #endif 65 66 #define RV(x) ((target_ulong)1 << (x - 'A')) 67 68 /* 69 * Consider updating register_cpu_props() when adding 70 * new MISA bits here. 71 */ 72 #define RVI RV('I') 73 #define RVE RV('E') /* E and I are mutually exclusive */ 74 #define RVM RV('M') 75 #define RVA RV('A') 76 #define RVF RV('F') 77 #define RVD RV('D') 78 #define RVV RV('V') 79 #define RVC RV('C') 80 #define RVS RV('S') 81 #define RVU RV('U') 82 #define RVH RV('H') 83 #define RVJ RV('J') 84 85 86 /* Privileged specification version */ 87 enum { 88 PRIV_VERSION_1_10_0 = 0, 89 PRIV_VERSION_1_11_0, 90 PRIV_VERSION_1_12_0, 91 }; 92 93 #define VEXT_VERSION_1_00_0 0x00010000 94 95 enum { 96 TRANSLATE_SUCCESS, 97 TRANSLATE_FAIL, 98 TRANSLATE_PMP_FAIL, 99 TRANSLATE_G_STAGE_FAIL 100 }; 101 102 #define MMU_USER_IDX 3 103 104 #define MAX_RISCV_PMPS (16) 105 106 typedef struct CPUArchState CPURISCVState; 107 108 #if !defined(CONFIG_USER_ONLY) 109 #include "pmp.h" 110 #include "debug.h" 111 #endif 112 113 #define RV_VLEN_MAX 1024 114 #define RV_MAX_MHPMEVENTS 32 115 #define RV_MAX_MHPMCOUNTERS 32 116 117 FIELD(VTYPE, VLMUL, 0, 3) 118 FIELD(VTYPE, VSEW, 3, 3) 119 FIELD(VTYPE, VTA, 6, 1) 120 FIELD(VTYPE, VMA, 7, 1) 121 FIELD(VTYPE, VEDIV, 8, 2) 122 FIELD(VTYPE, RESERVED, 10, sizeof(target_ulong) * 8 - 11) 123 124 typedef struct PMUCTRState { 125 /* Current value of a counter */ 126 target_ulong mhpmcounter_val; 127 /* Current value of a counter in RV32 */ 128 target_ulong mhpmcounterh_val; 129 /* Snapshot values of counter */ 130 target_ulong mhpmcounter_prev; 131 /* Snapshort value of a counter in RV32 */ 132 target_ulong mhpmcounterh_prev; 133 bool started; 134 /* Value beyond UINT32_MAX/UINT64_MAX before overflow interrupt trigger */ 135 target_ulong irq_overflow_left; 136 } PMUCTRState; 137 138 struct CPUArchState { 139 target_ulong gpr[32]; 140 target_ulong gprh[32]; /* 64 top bits of the 128-bit registers */ 141 142 /* vector coprocessor state. */ 143 uint64_t vreg[32 * RV_VLEN_MAX / 64] QEMU_ALIGNED(16); 144 target_ulong vxrm; 145 target_ulong vxsat; 146 target_ulong vl; 147 target_ulong vstart; 148 target_ulong vtype; 149 bool vill; 150 151 target_ulong pc; 152 target_ulong load_res; 153 target_ulong load_val; 154 155 /* Floating-Point state */ 156 uint64_t fpr[32]; /* assume both F and D extensions */ 157 target_ulong frm; 158 float_status fp_status; 159 160 target_ulong badaddr; 161 target_ulong bins; 162 163 target_ulong guest_phys_fault_addr; 164 165 target_ulong priv_ver; 166 target_ulong bext_ver; 167 target_ulong vext_ver; 168 169 /* RISCVMXL, but uint32_t for vmstate migration */ 170 uint32_t misa_mxl; /* current mxl */ 171 uint32_t misa_mxl_max; /* max mxl for this cpu */ 172 uint32_t misa_ext; /* current extensions */ 173 uint32_t misa_ext_mask; /* max ext for this cpu */ 174 uint32_t xl; /* current xlen */ 175 176 /* 128-bit helpers upper part return value */ 177 target_ulong retxh; 178 179 target_ulong jvt; 180 181 #ifdef CONFIG_USER_ONLY 182 uint32_t elf_flags; 183 #endif 184 185 #ifndef CONFIG_USER_ONLY 186 target_ulong priv; 187 /* This contains QEMU specific information about the virt state. */ 188 bool virt_enabled; 189 target_ulong geilen; 190 uint64_t resetvec; 191 192 target_ulong mhartid; 193 /* 194 * For RV32 this is 32-bit mstatus and 32-bit mstatush. 195 * For RV64 this is a 64-bit mstatus. 196 */ 197 uint64_t mstatus; 198 199 uint64_t mip; 200 /* 201 * MIP contains the software writable version of SEIP ORed with the 202 * external interrupt value. The MIP register is always up-to-date. 203 * To keep track of the current source, we also save booleans of the values 204 * here. 205 */ 206 bool external_seip; 207 bool software_seip; 208 209 uint64_t miclaim; 210 211 uint64_t mie; 212 uint64_t mideleg; 213 214 target_ulong satp; /* since: priv-1.10.0 */ 215 target_ulong stval; 216 target_ulong medeleg; 217 218 target_ulong stvec; 219 target_ulong sepc; 220 target_ulong scause; 221 222 target_ulong mtvec; 223 target_ulong mepc; 224 target_ulong mcause; 225 target_ulong mtval; /* since: priv-1.10.0 */ 226 227 /* Machine and Supervisor interrupt priorities */ 228 uint8_t miprio[64]; 229 uint8_t siprio[64]; 230 231 /* AIA CSRs */ 232 target_ulong miselect; 233 target_ulong siselect; 234 235 /* Hypervisor CSRs */ 236 target_ulong hstatus; 237 target_ulong hedeleg; 238 uint64_t hideleg; 239 target_ulong hcounteren; 240 target_ulong htval; 241 target_ulong htinst; 242 target_ulong hgatp; 243 target_ulong hgeie; 244 target_ulong hgeip; 245 uint64_t htimedelta; 246 247 /* Hypervisor controlled virtual interrupt priorities */ 248 target_ulong hvictl; 249 uint8_t hviprio[64]; 250 251 /* Upper 64-bits of 128-bit CSRs */ 252 uint64_t mscratchh; 253 uint64_t sscratchh; 254 255 /* Virtual CSRs */ 256 /* 257 * For RV32 this is 32-bit vsstatus and 32-bit vsstatush. 258 * For RV64 this is a 64-bit vsstatus. 259 */ 260 uint64_t vsstatus; 261 target_ulong vstvec; 262 target_ulong vsscratch; 263 target_ulong vsepc; 264 target_ulong vscause; 265 target_ulong vstval; 266 target_ulong vsatp; 267 268 /* AIA VS-mode CSRs */ 269 target_ulong vsiselect; 270 271 target_ulong mtval2; 272 target_ulong mtinst; 273 274 /* HS Backup CSRs */ 275 target_ulong stvec_hs; 276 target_ulong sscratch_hs; 277 target_ulong sepc_hs; 278 target_ulong scause_hs; 279 target_ulong stval_hs; 280 target_ulong satp_hs; 281 uint64_t mstatus_hs; 282 283 /* 284 * Signals whether the current exception occurred with two-stage address 285 * translation active. 286 */ 287 bool two_stage_lookup; 288 /* 289 * Signals whether the current exception occurred while doing two-stage 290 * address translation for the VS-stage page table walk. 291 */ 292 bool two_stage_indirect_lookup; 293 294 target_ulong scounteren; 295 target_ulong mcounteren; 296 297 target_ulong mcountinhibit; 298 299 /* PMU counter state */ 300 PMUCTRState pmu_ctrs[RV_MAX_MHPMCOUNTERS]; 301 302 /* PMU event selector configured values. First three are unused */ 303 target_ulong mhpmevent_val[RV_MAX_MHPMEVENTS]; 304 305 /* PMU event selector configured values for RV32 */ 306 target_ulong mhpmeventh_val[RV_MAX_MHPMEVENTS]; 307 308 target_ulong sscratch; 309 target_ulong mscratch; 310 311 /* Sstc CSRs */ 312 uint64_t stimecmp; 313 314 uint64_t vstimecmp; 315 316 /* physical memory protection */ 317 pmp_table_t pmp_state; 318 target_ulong mseccfg; 319 320 /* trigger module */ 321 target_ulong trigger_cur; 322 target_ulong tdata1[RV_MAX_TRIGGERS]; 323 target_ulong tdata2[RV_MAX_TRIGGERS]; 324 target_ulong tdata3[RV_MAX_TRIGGERS]; 325 struct CPUBreakpoint *cpu_breakpoint[RV_MAX_TRIGGERS]; 326 struct CPUWatchpoint *cpu_watchpoint[RV_MAX_TRIGGERS]; 327 QEMUTimer *itrigger_timer[RV_MAX_TRIGGERS]; 328 int64_t last_icount; 329 bool itrigger_enabled; 330 331 /* machine specific rdtime callback */ 332 uint64_t (*rdtime_fn)(void *); 333 void *rdtime_fn_arg; 334 335 /* machine specific AIA ireg read-modify-write callback */ 336 #define AIA_MAKE_IREG(__isel, __priv, __virt, __vgein, __xlen) \ 337 ((((__xlen) & 0xff) << 24) | \ 338 (((__vgein) & 0x3f) << 20) | \ 339 (((__virt) & 0x1) << 18) | \ 340 (((__priv) & 0x3) << 16) | \ 341 (__isel & 0xffff)) 342 #define AIA_IREG_ISEL(__ireg) ((__ireg) & 0xffff) 343 #define AIA_IREG_PRIV(__ireg) (((__ireg) >> 16) & 0x3) 344 #define AIA_IREG_VIRT(__ireg) (((__ireg) >> 18) & 0x1) 345 #define AIA_IREG_VGEIN(__ireg) (((__ireg) >> 20) & 0x3f) 346 #define AIA_IREG_XLEN(__ireg) (((__ireg) >> 24) & 0xff) 347 int (*aia_ireg_rmw_fn[4])(void *arg, target_ulong reg, 348 target_ulong *val, target_ulong new_val, target_ulong write_mask); 349 void *aia_ireg_rmw_fn_arg[4]; 350 351 /* True if in debugger mode. */ 352 bool debugger; 353 354 /* 355 * CSRs for PointerMasking extension 356 */ 357 target_ulong mmte; 358 target_ulong mpmmask; 359 target_ulong mpmbase; 360 target_ulong spmmask; 361 target_ulong spmbase; 362 target_ulong upmmask; 363 target_ulong upmbase; 364 365 /* CSRs for execution enviornment configuration */ 366 uint64_t menvcfg; 367 uint64_t mstateen[SMSTATEEN_MAX_COUNT]; 368 uint64_t hstateen[SMSTATEEN_MAX_COUNT]; 369 uint64_t sstateen[SMSTATEEN_MAX_COUNT]; 370 target_ulong senvcfg; 371 uint64_t henvcfg; 372 #endif 373 target_ulong cur_pmmask; 374 target_ulong cur_pmbase; 375 376 /* Fields from here on are preserved across CPU reset. */ 377 QEMUTimer *stimer; /* Internal timer for S-mode interrupt */ 378 QEMUTimer *vstimer; /* Internal timer for VS-mode interrupt */ 379 bool vstime_irq; 380 381 hwaddr kernel_addr; 382 hwaddr fdt_addr; 383 384 /* kvm timer */ 385 bool kvm_timer_dirty; 386 uint64_t kvm_timer_time; 387 uint64_t kvm_timer_compare; 388 uint64_t kvm_timer_state; 389 uint64_t kvm_timer_frequency; 390 }; 391 392 OBJECT_DECLARE_CPU_TYPE(RISCVCPU, RISCVCPUClass, RISCV_CPU) 393 394 /* 395 * RISCVCPUClass: 396 * @parent_realize: The parent class' realize handler. 397 * @parent_phases: The parent class' reset phase handlers. 398 * 399 * A RISCV CPU model. 400 */ 401 struct RISCVCPUClass { 402 /* < private > */ 403 CPUClass parent_class; 404 /* < public > */ 405 DeviceRealize parent_realize; 406 ResettablePhases parent_phases; 407 }; 408 409 /* 410 * map is a 16-bit bitmap: the most significant set bit in map is the maximum 411 * satp mode that is supported. It may be chosen by the user and must respect 412 * what qemu implements (valid_1_10_32/64) and what the hw is capable of 413 * (supported bitmap below). 414 * 415 * init is a 16-bit bitmap used to make sure the user selected a correct 416 * configuration as per the specification. 417 * 418 * supported is a 16-bit bitmap used to reflect the hw capabilities. 419 */ 420 typedef struct { 421 uint16_t map, init, supported; 422 } RISCVSATPMap; 423 424 struct RISCVCPUConfig { 425 bool ext_g; 426 bool ext_zba; 427 bool ext_zbb; 428 bool ext_zbc; 429 bool ext_zbkb; 430 bool ext_zbkc; 431 bool ext_zbkx; 432 bool ext_zbs; 433 bool ext_zca; 434 bool ext_zcb; 435 bool ext_zcd; 436 bool ext_zce; 437 bool ext_zcf; 438 bool ext_zcmp; 439 bool ext_zcmt; 440 bool ext_zk; 441 bool ext_zkn; 442 bool ext_zknd; 443 bool ext_zkne; 444 bool ext_zknh; 445 bool ext_zkr; 446 bool ext_zks; 447 bool ext_zksed; 448 bool ext_zksh; 449 bool ext_zkt; 450 bool ext_ifencei; 451 bool ext_icsr; 452 bool ext_icbom; 453 bool ext_icboz; 454 bool ext_zicond; 455 bool ext_zihintpause; 456 bool ext_smstateen; 457 bool ext_sstc; 458 bool ext_svadu; 459 bool ext_svinval; 460 bool ext_svnapot; 461 bool ext_svpbmt; 462 bool ext_zdinx; 463 bool ext_zawrs; 464 bool ext_zfh; 465 bool ext_zfhmin; 466 bool ext_zfinx; 467 bool ext_zhinx; 468 bool ext_zhinxmin; 469 bool ext_zve32f; 470 bool ext_zve64f; 471 bool ext_zve64d; 472 bool ext_zmmul; 473 bool ext_zvfh; 474 bool ext_zvfhmin; 475 bool ext_smaia; 476 bool ext_ssaia; 477 bool ext_sscofpmf; 478 bool rvv_ta_all_1s; 479 bool rvv_ma_all_1s; 480 481 uint32_t mvendorid; 482 uint64_t marchid; 483 uint64_t mimpid; 484 485 /* Vendor-specific custom extensions */ 486 bool ext_xtheadba; 487 bool ext_xtheadbb; 488 bool ext_xtheadbs; 489 bool ext_xtheadcmo; 490 bool ext_xtheadcondmov; 491 bool ext_xtheadfmemidx; 492 bool ext_xtheadfmv; 493 bool ext_xtheadmac; 494 bool ext_xtheadmemidx; 495 bool ext_xtheadmempair; 496 bool ext_xtheadsync; 497 bool ext_XVentanaCondOps; 498 499 uint8_t pmu_num; 500 char *priv_spec; 501 char *user_spec; 502 char *bext_spec; 503 char *vext_spec; 504 uint16_t vlen; 505 uint16_t elen; 506 uint16_t cbom_blocksize; 507 uint16_t cboz_blocksize; 508 bool mmu; 509 bool pmp; 510 bool epmp; 511 bool debug; 512 bool misa_w; 513 514 bool short_isa_string; 515 516 #ifndef CONFIG_USER_ONLY 517 RISCVSATPMap satp_mode; 518 #endif 519 }; 520 521 typedef struct RISCVCPUConfig RISCVCPUConfig; 522 523 /* 524 * RISCVCPU: 525 * @env: #CPURISCVState 526 * 527 * A RISCV CPU. 528 */ 529 struct ArchCPU { 530 /* < private > */ 531 CPUState parent_obj; 532 /* < public > */ 533 CPUNegativeOffsetState neg; 534 CPURISCVState env; 535 536 char *dyn_csr_xml; 537 char *dyn_vreg_xml; 538 539 /* Configuration Settings */ 540 RISCVCPUConfig cfg; 541 542 QEMUTimer *pmu_timer; 543 /* A bitmask of Available programmable counters */ 544 uint32_t pmu_avail_ctrs; 545 /* Mapping of events to counters */ 546 GHashTable *pmu_event_ctr_map; 547 }; 548 549 static inline int riscv_has_ext(CPURISCVState *env, target_ulong ext) 550 { 551 return (env->misa_ext & ext) != 0; 552 } 553 554 #include "cpu_user.h" 555 556 extern const char * const riscv_int_regnames[]; 557 extern const char * const riscv_int_regnamesh[]; 558 extern const char * const riscv_fpr_regnames[]; 559 560 const char *riscv_cpu_get_trap_name(target_ulong cause, bool async); 561 void riscv_cpu_do_interrupt(CPUState *cpu); 562 int riscv_cpu_write_elf64_note(WriteCoreDumpFunction f, CPUState *cs, 563 int cpuid, DumpState *s); 564 int riscv_cpu_write_elf32_note(WriteCoreDumpFunction f, CPUState *cs, 565 int cpuid, DumpState *s); 566 int riscv_cpu_gdb_read_register(CPUState *cpu, GByteArray *buf, int reg); 567 int riscv_cpu_gdb_write_register(CPUState *cpu, uint8_t *buf, int reg); 568 int riscv_cpu_hviprio_index2irq(int index, int *out_irq, int *out_rdzero); 569 uint8_t riscv_cpu_default_priority(int irq); 570 uint64_t riscv_cpu_all_pending(CPURISCVState *env); 571 int riscv_cpu_mirq_pending(CPURISCVState *env); 572 int riscv_cpu_sirq_pending(CPURISCVState *env); 573 int riscv_cpu_vsirq_pending(CPURISCVState *env); 574 bool riscv_cpu_fp_enabled(CPURISCVState *env); 575 target_ulong riscv_cpu_get_geilen(CPURISCVState *env); 576 void riscv_cpu_set_geilen(CPURISCVState *env, target_ulong geilen); 577 bool riscv_cpu_vector_enabled(CPURISCVState *env); 578 void riscv_cpu_set_virt_enabled(CPURISCVState *env, bool enable); 579 bool riscv_cpu_two_stage_lookup(int mmu_idx); 580 int riscv_cpu_mmu_index(CPURISCVState *env, bool ifetch); 581 G_NORETURN void riscv_cpu_do_unaligned_access(CPUState *cs, vaddr addr, 582 MMUAccessType access_type, 583 int mmu_idx, uintptr_t retaddr); 584 bool riscv_cpu_tlb_fill(CPUState *cs, vaddr address, int size, 585 MMUAccessType access_type, int mmu_idx, 586 bool probe, uintptr_t retaddr); 587 char *riscv_isa_string(RISCVCPU *cpu); 588 void riscv_cpu_list(void); 589 590 #define cpu_list riscv_cpu_list 591 #define cpu_mmu_index riscv_cpu_mmu_index 592 593 #ifndef CONFIG_USER_ONLY 594 void riscv_cpu_do_transaction_failed(CPUState *cs, hwaddr physaddr, 595 vaddr addr, unsigned size, 596 MMUAccessType access_type, 597 int mmu_idx, MemTxAttrs attrs, 598 MemTxResult response, uintptr_t retaddr); 599 hwaddr riscv_cpu_get_phys_page_debug(CPUState *cpu, vaddr addr); 600 bool riscv_cpu_exec_interrupt(CPUState *cs, int interrupt_request); 601 void riscv_cpu_swap_hypervisor_regs(CPURISCVState *env); 602 int riscv_cpu_claim_interrupts(RISCVCPU *cpu, uint64_t interrupts); 603 uint64_t riscv_cpu_update_mip(CPURISCVState *env, uint64_t mask, 604 uint64_t value); 605 #define BOOL_TO_MASK(x) (-!!(x)) /* helper for riscv_cpu_update_mip value */ 606 void riscv_cpu_set_rdtime_fn(CPURISCVState *env, uint64_t (*fn)(void *), 607 void *arg); 608 void riscv_cpu_set_aia_ireg_rmw_fn(CPURISCVState *env, uint32_t priv, 609 int (*rmw_fn)(void *arg, 610 target_ulong reg, 611 target_ulong *val, 612 target_ulong new_val, 613 target_ulong write_mask), 614 void *rmw_fn_arg); 615 616 RISCVException smstateen_acc_ok(CPURISCVState *env, int index, uint64_t bit); 617 #endif 618 void riscv_cpu_set_mode(CPURISCVState *env, target_ulong newpriv); 619 620 void riscv_translate_init(void); 621 G_NORETURN void riscv_raise_exception(CPURISCVState *env, 622 uint32_t exception, uintptr_t pc); 623 624 target_ulong riscv_cpu_get_fflags(CPURISCVState *env); 625 void riscv_cpu_set_fflags(CPURISCVState *env, target_ulong); 626 627 #define TB_FLAGS_PRIV_MMU_MASK 3 628 #define TB_FLAGS_PRIV_HYP_ACCESS_MASK (1 << 2) 629 #define TB_FLAGS_MSTATUS_FS MSTATUS_FS 630 #define TB_FLAGS_MSTATUS_VS MSTATUS_VS 631 632 #include "exec/cpu-all.h" 633 634 FIELD(TB_FLAGS, MEM_IDX, 0, 3) 635 FIELD(TB_FLAGS, LMUL, 3, 3) 636 FIELD(TB_FLAGS, SEW, 6, 3) 637 /* Skip MSTATUS_VS (0x600) bits */ 638 FIELD(TB_FLAGS, VL_EQ_VLMAX, 11, 1) 639 FIELD(TB_FLAGS, VILL, 12, 1) 640 /* Skip MSTATUS_FS (0x6000) bits */ 641 /* Is a Hypervisor instruction load/store allowed? */ 642 FIELD(TB_FLAGS, HLSX, 15, 1) 643 FIELD(TB_FLAGS, MSTATUS_HS_FS, 16, 2) 644 FIELD(TB_FLAGS, MSTATUS_HS_VS, 18, 2) 645 /* The combination of MXL/SXL/UXL that applies to the current cpu mode. */ 646 FIELD(TB_FLAGS, XL, 20, 2) 647 /* If PointerMasking should be applied */ 648 FIELD(TB_FLAGS, PM_MASK_ENABLED, 22, 1) 649 FIELD(TB_FLAGS, PM_BASE_ENABLED, 23, 1) 650 FIELD(TB_FLAGS, VTA, 24, 1) 651 FIELD(TB_FLAGS, VMA, 25, 1) 652 /* Native debug itrigger */ 653 FIELD(TB_FLAGS, ITRIGGER, 26, 1) 654 655 #ifdef TARGET_RISCV32 656 #define riscv_cpu_mxl(env) ((void)(env), MXL_RV32) 657 #else 658 static inline RISCVMXL riscv_cpu_mxl(CPURISCVState *env) 659 { 660 return env->misa_mxl; 661 } 662 #endif 663 #define riscv_cpu_mxl_bits(env) (1UL << (4 + riscv_cpu_mxl(env))) 664 665 static inline const RISCVCPUConfig *riscv_cpu_cfg(CPURISCVState *env) 666 { 667 return &env_archcpu(env)->cfg; 668 } 669 670 #if defined(TARGET_RISCV32) 671 #define cpu_recompute_xl(env) ((void)(env), MXL_RV32) 672 #else 673 static inline RISCVMXL cpu_recompute_xl(CPURISCVState *env) 674 { 675 RISCVMXL xl = env->misa_mxl; 676 #if !defined(CONFIG_USER_ONLY) 677 /* 678 * When emulating a 32-bit-only cpu, use RV32. 679 * When emulating a 64-bit cpu, and MXL has been reduced to RV32, 680 * MSTATUSH doesn't have UXL/SXL, therefore XLEN cannot be widened 681 * back to RV64 for lower privs. 682 */ 683 if (xl != MXL_RV32) { 684 switch (env->priv) { 685 case PRV_M: 686 break; 687 case PRV_U: 688 xl = get_field(env->mstatus, MSTATUS64_UXL); 689 break; 690 default: /* PRV_S | PRV_H */ 691 xl = get_field(env->mstatus, MSTATUS64_SXL); 692 break; 693 } 694 } 695 #endif 696 return xl; 697 } 698 #endif 699 700 static inline int riscv_cpu_xlen(CPURISCVState *env) 701 { 702 return 16 << env->xl; 703 } 704 705 #ifdef TARGET_RISCV32 706 #define riscv_cpu_sxl(env) ((void)(env), MXL_RV32) 707 #else 708 static inline RISCVMXL riscv_cpu_sxl(CPURISCVState *env) 709 { 710 #ifdef CONFIG_USER_ONLY 711 return env->misa_mxl; 712 #else 713 return get_field(env->mstatus, MSTATUS64_SXL); 714 #endif 715 } 716 #endif 717 718 /* 719 * Encode LMUL to lmul as follows: 720 * LMUL vlmul lmul 721 * 1 000 0 722 * 2 001 1 723 * 4 010 2 724 * 8 011 3 725 * - 100 - 726 * 1/8 101 -3 727 * 1/4 110 -2 728 * 1/2 111 -1 729 * 730 * then, we can calculate VLMAX = vlen >> (vsew + 3 - lmul) 731 * e.g. vlen = 256 bits, SEW = 16, LMUL = 1/8 732 * => VLMAX = vlen >> (1 + 3 - (-3)) 733 * = 256 >> 7 734 * = 2 735 */ 736 static inline uint32_t vext_get_vlmax(RISCVCPU *cpu, target_ulong vtype) 737 { 738 uint8_t sew = FIELD_EX64(vtype, VTYPE, VSEW); 739 int8_t lmul = sextract32(FIELD_EX64(vtype, VTYPE, VLMUL), 0, 3); 740 return cpu->cfg.vlen >> (sew + 3 - lmul); 741 } 742 743 void cpu_get_tb_cpu_state(CPURISCVState *env, target_ulong *pc, 744 target_ulong *cs_base, uint32_t *pflags); 745 746 void riscv_cpu_update_mask(CPURISCVState *env); 747 748 RISCVException riscv_csrrw(CPURISCVState *env, int csrno, 749 target_ulong *ret_value, 750 target_ulong new_value, target_ulong write_mask); 751 RISCVException riscv_csrrw_debug(CPURISCVState *env, int csrno, 752 target_ulong *ret_value, 753 target_ulong new_value, 754 target_ulong write_mask); 755 756 static inline void riscv_csr_write(CPURISCVState *env, int csrno, 757 target_ulong val) 758 { 759 riscv_csrrw(env, csrno, NULL, val, MAKE_64BIT_MASK(0, TARGET_LONG_BITS)); 760 } 761 762 static inline target_ulong riscv_csr_read(CPURISCVState *env, int csrno) 763 { 764 target_ulong val = 0; 765 riscv_csrrw(env, csrno, &val, 0, 0); 766 return val; 767 } 768 769 typedef RISCVException (*riscv_csr_predicate_fn)(CPURISCVState *env, 770 int csrno); 771 typedef RISCVException (*riscv_csr_read_fn)(CPURISCVState *env, int csrno, 772 target_ulong *ret_value); 773 typedef RISCVException (*riscv_csr_write_fn)(CPURISCVState *env, int csrno, 774 target_ulong new_value); 775 typedef RISCVException (*riscv_csr_op_fn)(CPURISCVState *env, int csrno, 776 target_ulong *ret_value, 777 target_ulong new_value, 778 target_ulong write_mask); 779 780 RISCVException riscv_csrrw_i128(CPURISCVState *env, int csrno, 781 Int128 *ret_value, 782 Int128 new_value, Int128 write_mask); 783 784 typedef RISCVException (*riscv_csr_read128_fn)(CPURISCVState *env, int csrno, 785 Int128 *ret_value); 786 typedef RISCVException (*riscv_csr_write128_fn)(CPURISCVState *env, int csrno, 787 Int128 new_value); 788 789 typedef struct { 790 const char *name; 791 riscv_csr_predicate_fn predicate; 792 riscv_csr_read_fn read; 793 riscv_csr_write_fn write; 794 riscv_csr_op_fn op; 795 riscv_csr_read128_fn read128; 796 riscv_csr_write128_fn write128; 797 /* The default priv spec version should be PRIV_VERSION_1_10_0 (i.e 0) */ 798 uint32_t min_priv_ver; 799 } riscv_csr_operations; 800 801 /* CSR function table constants */ 802 enum { 803 CSR_TABLE_SIZE = 0x1000 804 }; 805 806 /* 807 * The event id are encoded based on the encoding specified in the 808 * SBI specification v0.3 809 */ 810 811 enum riscv_pmu_event_idx { 812 RISCV_PMU_EVENT_HW_CPU_CYCLES = 0x01, 813 RISCV_PMU_EVENT_HW_INSTRUCTIONS = 0x02, 814 RISCV_PMU_EVENT_CACHE_DTLB_READ_MISS = 0x10019, 815 RISCV_PMU_EVENT_CACHE_DTLB_WRITE_MISS = 0x1001B, 816 RISCV_PMU_EVENT_CACHE_ITLB_PREFETCH_MISS = 0x10021, 817 }; 818 819 /* CSR function table */ 820 extern riscv_csr_operations csr_ops[CSR_TABLE_SIZE]; 821 822 extern const bool valid_vm_1_10_32[], valid_vm_1_10_64[]; 823 824 void riscv_get_csr_ops(int csrno, riscv_csr_operations *ops); 825 void riscv_set_csr_ops(int csrno, riscv_csr_operations *ops); 826 827 void riscv_cpu_register_gdb_regs_for_features(CPUState *cs); 828 829 uint8_t satp_mode_max_from_map(uint32_t map); 830 const char *satp_mode_str(uint8_t satp_mode, bool is_32_bit); 831 832 #endif /* RISCV_CPU_H */ 833