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 "cpu_cfg.h" 31 #include "qapi/qapi-types-common.h" 32 #include "cpu-qom.h" 33 34 #define TCG_GUEST_DEFAULT_MO 0 35 36 /* 37 * RISC-V-specific extra insn start words: 38 * 1: Original instruction opcode 39 */ 40 #define TARGET_INSN_START_EXTRA_WORDS 1 41 42 #define RV(x) ((target_ulong)1 << (x - 'A')) 43 44 /* Consider updating misa_ext_cfgs[] when adding new MISA bits here */ 45 #define RVI RV('I') 46 #define RVE RV('E') /* E and I are mutually exclusive */ 47 #define RVM RV('M') 48 #define RVA RV('A') 49 #define RVF RV('F') 50 #define RVD RV('D') 51 #define RVV RV('V') 52 #define RVC RV('C') 53 #define RVS RV('S') 54 #define RVU RV('U') 55 #define RVH RV('H') 56 #define RVJ RV('J') 57 #define RVG RV('G') 58 59 60 /* Privileged specification version */ 61 enum { 62 PRIV_VERSION_1_10_0 = 0, 63 PRIV_VERSION_1_11_0, 64 PRIV_VERSION_1_12_0, 65 66 PRIV_VERSION_LATEST = PRIV_VERSION_1_12_0, 67 }; 68 69 #define VEXT_VERSION_1_00_0 0x00010000 70 71 enum { 72 TRANSLATE_SUCCESS, 73 TRANSLATE_FAIL, 74 TRANSLATE_PMP_FAIL, 75 TRANSLATE_G_STAGE_FAIL 76 }; 77 78 /* Extension context status */ 79 typedef enum { 80 EXT_STATUS_DISABLED = 0, 81 EXT_STATUS_INITIAL, 82 EXT_STATUS_CLEAN, 83 EXT_STATUS_DIRTY, 84 } RISCVExtStatus; 85 86 #define MMU_USER_IDX 3 87 88 #define MAX_RISCV_PMPS (16) 89 90 #if !defined(CONFIG_USER_ONLY) 91 #include "pmp.h" 92 #include "debug.h" 93 #endif 94 95 #define RV_VLEN_MAX 1024 96 #define RV_MAX_MHPMEVENTS 32 97 #define RV_MAX_MHPMCOUNTERS 32 98 99 FIELD(VTYPE, VLMUL, 0, 3) 100 FIELD(VTYPE, VSEW, 3, 3) 101 FIELD(VTYPE, VTA, 6, 1) 102 FIELD(VTYPE, VMA, 7, 1) 103 FIELD(VTYPE, VEDIV, 8, 2) 104 FIELD(VTYPE, RESERVED, 10, sizeof(target_ulong) * 8 - 11) 105 106 typedef struct PMUCTRState { 107 /* Current value of a counter */ 108 target_ulong mhpmcounter_val; 109 /* Current value of a counter in RV32 */ 110 target_ulong mhpmcounterh_val; 111 /* Snapshot values of counter */ 112 target_ulong mhpmcounter_prev; 113 /* Snapshort value of a counter in RV32 */ 114 target_ulong mhpmcounterh_prev; 115 bool started; 116 /* Value beyond UINT32_MAX/UINT64_MAX before overflow interrupt trigger */ 117 target_ulong irq_overflow_left; 118 } PMUCTRState; 119 120 struct CPUArchState { 121 target_ulong gpr[32]; 122 target_ulong gprh[32]; /* 64 top bits of the 128-bit registers */ 123 124 /* vector coprocessor state. */ 125 uint64_t vreg[32 * RV_VLEN_MAX / 64] QEMU_ALIGNED(16); 126 target_ulong vxrm; 127 target_ulong vxsat; 128 target_ulong vl; 129 target_ulong vstart; 130 target_ulong vtype; 131 bool vill; 132 133 target_ulong pc; 134 target_ulong load_res; 135 target_ulong load_val; 136 137 /* Floating-Point state */ 138 uint64_t fpr[32]; /* assume both F and D extensions */ 139 target_ulong frm; 140 float_status fp_status; 141 142 target_ulong badaddr; 143 target_ulong bins; 144 145 target_ulong guest_phys_fault_addr; 146 147 target_ulong priv_ver; 148 target_ulong bext_ver; 149 target_ulong vext_ver; 150 151 /* RISCVMXL, but uint32_t for vmstate migration */ 152 uint32_t misa_mxl; /* current mxl */ 153 uint32_t misa_mxl_max; /* max mxl for this cpu */ 154 uint32_t misa_ext; /* current extensions */ 155 uint32_t misa_ext_mask; /* max ext for this cpu */ 156 uint32_t xl; /* current xlen */ 157 158 /* 128-bit helpers upper part return value */ 159 target_ulong retxh; 160 161 target_ulong jvt; 162 163 #ifdef CONFIG_USER_ONLY 164 uint32_t elf_flags; 165 #endif 166 167 #ifndef CONFIG_USER_ONLY 168 target_ulong priv; 169 /* This contains QEMU specific information about the virt state. */ 170 bool virt_enabled; 171 target_ulong geilen; 172 uint64_t resetvec; 173 174 target_ulong mhartid; 175 /* 176 * For RV32 this is 32-bit mstatus and 32-bit mstatush. 177 * For RV64 this is a 64-bit mstatus. 178 */ 179 uint64_t mstatus; 180 181 uint64_t mip; 182 /* 183 * MIP contains the software writable version of SEIP ORed with the 184 * external interrupt value. The MIP register is always up-to-date. 185 * To keep track of the current source, we also save booleans of the values 186 * here. 187 */ 188 bool external_seip; 189 bool software_seip; 190 191 uint64_t miclaim; 192 193 uint64_t mie; 194 uint64_t mideleg; 195 196 target_ulong satp; /* since: priv-1.10.0 */ 197 target_ulong stval; 198 target_ulong medeleg; 199 200 target_ulong stvec; 201 target_ulong sepc; 202 target_ulong scause; 203 204 target_ulong mtvec; 205 target_ulong mepc; 206 target_ulong mcause; 207 target_ulong mtval; /* since: priv-1.10.0 */ 208 209 /* Machine and Supervisor interrupt priorities */ 210 uint8_t miprio[64]; 211 uint8_t siprio[64]; 212 213 /* AIA CSRs */ 214 target_ulong miselect; 215 target_ulong siselect; 216 217 /* Hypervisor CSRs */ 218 target_ulong hstatus; 219 target_ulong hedeleg; 220 uint64_t hideleg; 221 target_ulong hcounteren; 222 target_ulong htval; 223 target_ulong htinst; 224 target_ulong hgatp; 225 target_ulong hgeie; 226 target_ulong hgeip; 227 uint64_t htimedelta; 228 229 /* Hypervisor controlled virtual interrupt priorities */ 230 target_ulong hvictl; 231 uint8_t hviprio[64]; 232 233 /* Upper 64-bits of 128-bit CSRs */ 234 uint64_t mscratchh; 235 uint64_t sscratchh; 236 237 /* Virtual CSRs */ 238 /* 239 * For RV32 this is 32-bit vsstatus and 32-bit vsstatush. 240 * For RV64 this is a 64-bit vsstatus. 241 */ 242 uint64_t vsstatus; 243 target_ulong vstvec; 244 target_ulong vsscratch; 245 target_ulong vsepc; 246 target_ulong vscause; 247 target_ulong vstval; 248 target_ulong vsatp; 249 250 /* AIA VS-mode CSRs */ 251 target_ulong vsiselect; 252 253 target_ulong mtval2; 254 target_ulong mtinst; 255 256 /* HS Backup CSRs */ 257 target_ulong stvec_hs; 258 target_ulong sscratch_hs; 259 target_ulong sepc_hs; 260 target_ulong scause_hs; 261 target_ulong stval_hs; 262 target_ulong satp_hs; 263 uint64_t mstatus_hs; 264 265 /* 266 * Signals whether the current exception occurred with two-stage address 267 * translation active. 268 */ 269 bool two_stage_lookup; 270 /* 271 * Signals whether the current exception occurred while doing two-stage 272 * address translation for the VS-stage page table walk. 273 */ 274 bool two_stage_indirect_lookup; 275 276 target_ulong scounteren; 277 target_ulong mcounteren; 278 279 target_ulong mcountinhibit; 280 281 /* PMU counter state */ 282 PMUCTRState pmu_ctrs[RV_MAX_MHPMCOUNTERS]; 283 284 /* PMU event selector configured values. First three are unused */ 285 target_ulong mhpmevent_val[RV_MAX_MHPMEVENTS]; 286 287 /* PMU event selector configured values for RV32 */ 288 target_ulong mhpmeventh_val[RV_MAX_MHPMEVENTS]; 289 290 target_ulong sscratch; 291 target_ulong mscratch; 292 293 /* Sstc CSRs */ 294 uint64_t stimecmp; 295 296 uint64_t vstimecmp; 297 298 /* physical memory protection */ 299 pmp_table_t pmp_state; 300 target_ulong mseccfg; 301 302 /* trigger module */ 303 target_ulong trigger_cur; 304 target_ulong tdata1[RV_MAX_TRIGGERS]; 305 target_ulong tdata2[RV_MAX_TRIGGERS]; 306 target_ulong tdata3[RV_MAX_TRIGGERS]; 307 struct CPUBreakpoint *cpu_breakpoint[RV_MAX_TRIGGERS]; 308 struct CPUWatchpoint *cpu_watchpoint[RV_MAX_TRIGGERS]; 309 QEMUTimer *itrigger_timer[RV_MAX_TRIGGERS]; 310 int64_t last_icount; 311 bool itrigger_enabled; 312 313 /* machine specific rdtime callback */ 314 uint64_t (*rdtime_fn)(void *); 315 void *rdtime_fn_arg; 316 317 /* machine specific AIA ireg read-modify-write callback */ 318 #define AIA_MAKE_IREG(__isel, __priv, __virt, __vgein, __xlen) \ 319 ((((__xlen) & 0xff) << 24) | \ 320 (((__vgein) & 0x3f) << 20) | \ 321 (((__virt) & 0x1) << 18) | \ 322 (((__priv) & 0x3) << 16) | \ 323 (__isel & 0xffff)) 324 #define AIA_IREG_ISEL(__ireg) ((__ireg) & 0xffff) 325 #define AIA_IREG_PRIV(__ireg) (((__ireg) >> 16) & 0x3) 326 #define AIA_IREG_VIRT(__ireg) (((__ireg) >> 18) & 0x1) 327 #define AIA_IREG_VGEIN(__ireg) (((__ireg) >> 20) & 0x3f) 328 #define AIA_IREG_XLEN(__ireg) (((__ireg) >> 24) & 0xff) 329 int (*aia_ireg_rmw_fn[4])(void *arg, target_ulong reg, 330 target_ulong *val, target_ulong new_val, target_ulong write_mask); 331 void *aia_ireg_rmw_fn_arg[4]; 332 333 /* True if in debugger mode. */ 334 bool debugger; 335 336 /* 337 * CSRs for PointerMasking extension 338 */ 339 target_ulong mmte; 340 target_ulong mpmmask; 341 target_ulong mpmbase; 342 target_ulong spmmask; 343 target_ulong spmbase; 344 target_ulong upmmask; 345 target_ulong upmbase; 346 347 /* CSRs for execution enviornment configuration */ 348 uint64_t menvcfg; 349 uint64_t mstateen[SMSTATEEN_MAX_COUNT]; 350 uint64_t hstateen[SMSTATEEN_MAX_COUNT]; 351 uint64_t sstateen[SMSTATEEN_MAX_COUNT]; 352 target_ulong senvcfg; 353 uint64_t henvcfg; 354 #endif 355 target_ulong cur_pmmask; 356 target_ulong cur_pmbase; 357 358 /* Fields from here on are preserved across CPU reset. */ 359 QEMUTimer *stimer; /* Internal timer for S-mode interrupt */ 360 QEMUTimer *vstimer; /* Internal timer for VS-mode interrupt */ 361 bool vstime_irq; 362 363 hwaddr kernel_addr; 364 hwaddr fdt_addr; 365 366 #ifdef CONFIG_KVM 367 /* kvm timer */ 368 bool kvm_timer_dirty; 369 uint64_t kvm_timer_time; 370 uint64_t kvm_timer_compare; 371 uint64_t kvm_timer_state; 372 uint64_t kvm_timer_frequency; 373 #endif /* CONFIG_KVM */ 374 }; 375 376 /* 377 * RISCVCPU: 378 * @env: #CPURISCVState 379 * 380 * A RISCV CPU. 381 */ 382 struct ArchCPU { 383 /* < private > */ 384 CPUState parent_obj; 385 /* < public > */ 386 CPUNegativeOffsetState neg; 387 CPURISCVState env; 388 389 char *dyn_csr_xml; 390 char *dyn_vreg_xml; 391 392 /* Configuration Settings */ 393 RISCVCPUConfig cfg; 394 395 QEMUTimer *pmu_timer; 396 /* A bitmask of Available programmable counters */ 397 uint32_t pmu_avail_ctrs; 398 /* Mapping of events to counters */ 399 GHashTable *pmu_event_ctr_map; 400 }; 401 402 static inline int riscv_has_ext(CPURISCVState *env, target_ulong ext) 403 { 404 return (env->misa_ext & ext) != 0; 405 } 406 407 #include "cpu_user.h" 408 409 extern const char * const riscv_int_regnames[]; 410 extern const char * const riscv_int_regnamesh[]; 411 extern const char * const riscv_fpr_regnames[]; 412 413 const char *riscv_cpu_get_trap_name(target_ulong cause, bool async); 414 void riscv_cpu_do_interrupt(CPUState *cpu); 415 int riscv_cpu_write_elf64_note(WriteCoreDumpFunction f, CPUState *cs, 416 int cpuid, DumpState *s); 417 int riscv_cpu_write_elf32_note(WriteCoreDumpFunction f, CPUState *cs, 418 int cpuid, DumpState *s); 419 int riscv_cpu_gdb_read_register(CPUState *cpu, GByteArray *buf, int reg); 420 int riscv_cpu_gdb_write_register(CPUState *cpu, uint8_t *buf, int reg); 421 int riscv_cpu_hviprio_index2irq(int index, int *out_irq, int *out_rdzero); 422 uint8_t riscv_cpu_default_priority(int irq); 423 uint64_t riscv_cpu_all_pending(CPURISCVState *env); 424 int riscv_cpu_mirq_pending(CPURISCVState *env); 425 int riscv_cpu_sirq_pending(CPURISCVState *env); 426 int riscv_cpu_vsirq_pending(CPURISCVState *env); 427 bool riscv_cpu_fp_enabled(CPURISCVState *env); 428 target_ulong riscv_cpu_get_geilen(CPURISCVState *env); 429 void riscv_cpu_set_geilen(CPURISCVState *env, target_ulong geilen); 430 bool riscv_cpu_vector_enabled(CPURISCVState *env); 431 void riscv_cpu_set_virt_enabled(CPURISCVState *env, bool enable); 432 int riscv_cpu_mmu_index(CPURISCVState *env, bool ifetch); 433 G_NORETURN void riscv_cpu_do_unaligned_access(CPUState *cs, vaddr addr, 434 MMUAccessType access_type, 435 int mmu_idx, uintptr_t retaddr); 436 bool riscv_cpu_tlb_fill(CPUState *cs, vaddr address, int size, 437 MMUAccessType access_type, int mmu_idx, 438 bool probe, uintptr_t retaddr); 439 char *riscv_isa_string(RISCVCPU *cpu); 440 void riscv_cpu_list(void); 441 void riscv_cpu_validate_set_extensions(RISCVCPU *cpu, Error **errp); 442 443 #define cpu_list riscv_cpu_list 444 #define cpu_mmu_index riscv_cpu_mmu_index 445 446 #ifndef CONFIG_USER_ONLY 447 void riscv_cpu_do_transaction_failed(CPUState *cs, hwaddr physaddr, 448 vaddr addr, unsigned size, 449 MMUAccessType access_type, 450 int mmu_idx, MemTxAttrs attrs, 451 MemTxResult response, uintptr_t retaddr); 452 hwaddr riscv_cpu_get_phys_page_debug(CPUState *cpu, vaddr addr); 453 bool riscv_cpu_exec_interrupt(CPUState *cs, int interrupt_request); 454 void riscv_cpu_swap_hypervisor_regs(CPURISCVState *env); 455 int riscv_cpu_claim_interrupts(RISCVCPU *cpu, uint64_t interrupts); 456 uint64_t riscv_cpu_update_mip(CPURISCVState *env, uint64_t mask, 457 uint64_t value); 458 #define BOOL_TO_MASK(x) (-!!(x)) /* helper for riscv_cpu_update_mip value */ 459 void riscv_cpu_set_rdtime_fn(CPURISCVState *env, uint64_t (*fn)(void *), 460 void *arg); 461 void riscv_cpu_set_aia_ireg_rmw_fn(CPURISCVState *env, uint32_t priv, 462 int (*rmw_fn)(void *arg, 463 target_ulong reg, 464 target_ulong *val, 465 target_ulong new_val, 466 target_ulong write_mask), 467 void *rmw_fn_arg); 468 469 RISCVException smstateen_acc_ok(CPURISCVState *env, int index, uint64_t bit); 470 #endif 471 void riscv_cpu_set_mode(CPURISCVState *env, target_ulong newpriv); 472 473 void riscv_translate_init(void); 474 G_NORETURN void riscv_raise_exception(CPURISCVState *env, 475 uint32_t exception, uintptr_t pc); 476 477 target_ulong riscv_cpu_get_fflags(CPURISCVState *env); 478 void riscv_cpu_set_fflags(CPURISCVState *env, target_ulong); 479 480 #include "exec/cpu-all.h" 481 482 FIELD(TB_FLAGS, MEM_IDX, 0, 3) 483 FIELD(TB_FLAGS, FS, 3, 2) 484 /* Vector flags */ 485 FIELD(TB_FLAGS, VS, 5, 2) 486 FIELD(TB_FLAGS, LMUL, 7, 3) 487 FIELD(TB_FLAGS, SEW, 10, 3) 488 FIELD(TB_FLAGS, VL_EQ_VLMAX, 13, 1) 489 FIELD(TB_FLAGS, VILL, 14, 1) 490 FIELD(TB_FLAGS, VSTART_EQ_ZERO, 15, 1) 491 /* The combination of MXL/SXL/UXL that applies to the current cpu mode. */ 492 FIELD(TB_FLAGS, XL, 16, 2) 493 /* If PointerMasking should be applied */ 494 FIELD(TB_FLAGS, PM_MASK_ENABLED, 18, 1) 495 FIELD(TB_FLAGS, PM_BASE_ENABLED, 19, 1) 496 FIELD(TB_FLAGS, VTA, 20, 1) 497 FIELD(TB_FLAGS, VMA, 21, 1) 498 /* Native debug itrigger */ 499 FIELD(TB_FLAGS, ITRIGGER, 22, 1) 500 /* Virtual mode enabled */ 501 FIELD(TB_FLAGS, VIRT_ENABLED, 23, 1) 502 FIELD(TB_FLAGS, PRIV, 24, 2) 503 FIELD(TB_FLAGS, AXL, 26, 2) 504 505 #ifdef TARGET_RISCV32 506 #define riscv_cpu_mxl(env) ((void)(env), MXL_RV32) 507 #else 508 static inline RISCVMXL riscv_cpu_mxl(CPURISCVState *env) 509 { 510 return env->misa_mxl; 511 } 512 #endif 513 #define riscv_cpu_mxl_bits(env) (1UL << (4 + riscv_cpu_mxl(env))) 514 515 static inline const RISCVCPUConfig *riscv_cpu_cfg(CPURISCVState *env) 516 { 517 return &env_archcpu(env)->cfg; 518 } 519 520 #if !defined(CONFIG_USER_ONLY) 521 static inline int cpu_address_mode(CPURISCVState *env) 522 { 523 int mode = env->priv; 524 525 if (mode == PRV_M && get_field(env->mstatus, MSTATUS_MPRV)) { 526 mode = get_field(env->mstatus, MSTATUS_MPP); 527 } 528 return mode; 529 } 530 531 static inline RISCVMXL cpu_get_xl(CPURISCVState *env, target_ulong mode) 532 { 533 RISCVMXL xl = env->misa_mxl; 534 /* 535 * When emulating a 32-bit-only cpu, use RV32. 536 * When emulating a 64-bit cpu, and MXL has been reduced to RV32, 537 * MSTATUSH doesn't have UXL/SXL, therefore XLEN cannot be widened 538 * back to RV64 for lower privs. 539 */ 540 if (xl != MXL_RV32) { 541 switch (mode) { 542 case PRV_M: 543 break; 544 case PRV_U: 545 xl = get_field(env->mstatus, MSTATUS64_UXL); 546 break; 547 default: /* PRV_S */ 548 xl = get_field(env->mstatus, MSTATUS64_SXL); 549 break; 550 } 551 } 552 return xl; 553 } 554 #endif 555 556 #if defined(TARGET_RISCV32) 557 #define cpu_recompute_xl(env) ((void)(env), MXL_RV32) 558 #else 559 static inline RISCVMXL cpu_recompute_xl(CPURISCVState *env) 560 { 561 #if !defined(CONFIG_USER_ONLY) 562 return cpu_get_xl(env, env->priv); 563 #else 564 return env->misa_mxl; 565 #endif 566 } 567 #endif 568 569 #if defined(TARGET_RISCV32) 570 #define cpu_address_xl(env) ((void)(env), MXL_RV32) 571 #else 572 static inline RISCVMXL cpu_address_xl(CPURISCVState *env) 573 { 574 #ifdef CONFIG_USER_ONLY 575 return env->xl; 576 #else 577 int mode = cpu_address_mode(env); 578 579 return cpu_get_xl(env, mode); 580 #endif 581 } 582 #endif 583 584 static inline int riscv_cpu_xlen(CPURISCVState *env) 585 { 586 return 16 << env->xl; 587 } 588 589 #ifdef TARGET_RISCV32 590 #define riscv_cpu_sxl(env) ((void)(env), MXL_RV32) 591 #else 592 static inline RISCVMXL riscv_cpu_sxl(CPURISCVState *env) 593 { 594 #ifdef CONFIG_USER_ONLY 595 return env->misa_mxl; 596 #else 597 return get_field(env->mstatus, MSTATUS64_SXL); 598 #endif 599 } 600 #endif 601 602 /* 603 * Encode LMUL to lmul as follows: 604 * LMUL vlmul lmul 605 * 1 000 0 606 * 2 001 1 607 * 4 010 2 608 * 8 011 3 609 * - 100 - 610 * 1/8 101 -3 611 * 1/4 110 -2 612 * 1/2 111 -1 613 * 614 * then, we can calculate VLMAX = vlen >> (vsew + 3 - lmul) 615 * e.g. vlen = 256 bits, SEW = 16, LMUL = 1/8 616 * => VLMAX = vlen >> (1 + 3 - (-3)) 617 * = 256 >> 7 618 * = 2 619 */ 620 static inline uint32_t vext_get_vlmax(RISCVCPU *cpu, target_ulong vtype) 621 { 622 uint8_t sew = FIELD_EX64(vtype, VTYPE, VSEW); 623 int8_t lmul = sextract32(FIELD_EX64(vtype, VTYPE, VLMUL), 0, 3); 624 return cpu->cfg.vlen >> (sew + 3 - lmul); 625 } 626 627 void cpu_get_tb_cpu_state(CPURISCVState *env, vaddr *pc, 628 uint64_t *cs_base, uint32_t *pflags); 629 630 void riscv_cpu_update_mask(CPURISCVState *env); 631 632 RISCVException riscv_csrrw(CPURISCVState *env, int csrno, 633 target_ulong *ret_value, 634 target_ulong new_value, target_ulong write_mask); 635 RISCVException riscv_csrrw_debug(CPURISCVState *env, int csrno, 636 target_ulong *ret_value, 637 target_ulong new_value, 638 target_ulong write_mask); 639 640 static inline void riscv_csr_write(CPURISCVState *env, int csrno, 641 target_ulong val) 642 { 643 riscv_csrrw(env, csrno, NULL, val, MAKE_64BIT_MASK(0, TARGET_LONG_BITS)); 644 } 645 646 static inline target_ulong riscv_csr_read(CPURISCVState *env, int csrno) 647 { 648 target_ulong val = 0; 649 riscv_csrrw(env, csrno, &val, 0, 0); 650 return val; 651 } 652 653 typedef RISCVException (*riscv_csr_predicate_fn)(CPURISCVState *env, 654 int csrno); 655 typedef RISCVException (*riscv_csr_read_fn)(CPURISCVState *env, int csrno, 656 target_ulong *ret_value); 657 typedef RISCVException (*riscv_csr_write_fn)(CPURISCVState *env, int csrno, 658 target_ulong new_value); 659 typedef RISCVException (*riscv_csr_op_fn)(CPURISCVState *env, int csrno, 660 target_ulong *ret_value, 661 target_ulong new_value, 662 target_ulong write_mask); 663 664 RISCVException riscv_csrrw_i128(CPURISCVState *env, int csrno, 665 Int128 *ret_value, 666 Int128 new_value, Int128 write_mask); 667 668 typedef RISCVException (*riscv_csr_read128_fn)(CPURISCVState *env, int csrno, 669 Int128 *ret_value); 670 typedef RISCVException (*riscv_csr_write128_fn)(CPURISCVState *env, int csrno, 671 Int128 new_value); 672 673 typedef struct { 674 const char *name; 675 riscv_csr_predicate_fn predicate; 676 riscv_csr_read_fn read; 677 riscv_csr_write_fn write; 678 riscv_csr_op_fn op; 679 riscv_csr_read128_fn read128; 680 riscv_csr_write128_fn write128; 681 /* The default priv spec version should be PRIV_VERSION_1_10_0 (i.e 0) */ 682 uint32_t min_priv_ver; 683 } riscv_csr_operations; 684 685 /* CSR function table constants */ 686 enum { 687 CSR_TABLE_SIZE = 0x1000 688 }; 689 690 /* 691 * The event id are encoded based on the encoding specified in the 692 * SBI specification v0.3 693 */ 694 695 enum riscv_pmu_event_idx { 696 RISCV_PMU_EVENT_HW_CPU_CYCLES = 0x01, 697 RISCV_PMU_EVENT_HW_INSTRUCTIONS = 0x02, 698 RISCV_PMU_EVENT_CACHE_DTLB_READ_MISS = 0x10019, 699 RISCV_PMU_EVENT_CACHE_DTLB_WRITE_MISS = 0x1001B, 700 RISCV_PMU_EVENT_CACHE_ITLB_PREFETCH_MISS = 0x10021, 701 }; 702 703 /* CSR function table */ 704 extern riscv_csr_operations csr_ops[CSR_TABLE_SIZE]; 705 706 extern const bool valid_vm_1_10_32[], valid_vm_1_10_64[]; 707 708 void riscv_get_csr_ops(int csrno, riscv_csr_operations *ops); 709 void riscv_set_csr_ops(int csrno, riscv_csr_operations *ops); 710 711 void riscv_cpu_register_gdb_regs_for_features(CPUState *cs); 712 713 uint8_t satp_mode_max_from_map(uint32_t map); 714 const char *satp_mode_str(uint8_t satp_mode, bool is_32_bit); 715 716 #endif /* RISCV_CPU_H */ 717