target/riscv/cpu.h

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