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 "fpu/softfloat-types.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 #define TYPE_RISCV_CPU "riscv-cpu" 34 35 #define RISCV_CPU_TYPE_SUFFIX "-" TYPE_RISCV_CPU 36 #define RISCV_CPU_TYPE_NAME(name) (name RISCV_CPU_TYPE_SUFFIX) 37 #define CPU_RESOLVING_TYPE TYPE_RISCV_CPU 38 39 #define TYPE_RISCV_CPU_ANY RISCV_CPU_TYPE_NAME("any") 40 #define TYPE_RISCV_CPU_BASE32 RISCV_CPU_TYPE_NAME("rv32") 41 #define TYPE_RISCV_CPU_BASE64 RISCV_CPU_TYPE_NAME("rv64") 42 #define TYPE_RISCV_CPU_BASE128 RISCV_CPU_TYPE_NAME("x-rv128") 43 #define TYPE_RISCV_CPU_IBEX RISCV_CPU_TYPE_NAME("lowrisc-ibex") 44 #define TYPE_RISCV_CPU_SHAKTI_C RISCV_CPU_TYPE_NAME("shakti-c") 45 #define TYPE_RISCV_CPU_SIFIVE_E31 RISCV_CPU_TYPE_NAME("sifive-e31") 46 #define TYPE_RISCV_CPU_SIFIVE_E34 RISCV_CPU_TYPE_NAME("sifive-e34") 47 #define TYPE_RISCV_CPU_SIFIVE_E51 RISCV_CPU_TYPE_NAME("sifive-e51") 48 #define TYPE_RISCV_CPU_SIFIVE_U34 RISCV_CPU_TYPE_NAME("sifive-u34") 49 #define TYPE_RISCV_CPU_SIFIVE_U54 RISCV_CPU_TYPE_NAME("sifive-u54") 50 #define TYPE_RISCV_CPU_HOST RISCV_CPU_TYPE_NAME("host") 51 52 #if defined(TARGET_RISCV32) 53 # define TYPE_RISCV_CPU_BASE TYPE_RISCV_CPU_BASE32 54 #elif defined(TARGET_RISCV64) 55 # define TYPE_RISCV_CPU_BASE TYPE_RISCV_CPU_BASE64 56 #endif 57 58 #define RV(x) ((target_ulong)1 << (x - 'A')) 59 60 #define RVI RV('I') 61 #define RVE RV('E') /* E and I are mutually exclusive */ 62 #define RVM RV('M') 63 #define RVA RV('A') 64 #define RVF RV('F') 65 #define RVD RV('D') 66 #define RVV RV('V') 67 #define RVC RV('C') 68 #define RVS RV('S') 69 #define RVU RV('U') 70 #define RVH RV('H') 71 #define RVJ RV('J') 72 73 /* S extension denotes that Supervisor mode exists, however it is possible 74 to have a core that support S mode but does not have an MMU and there 75 is currently no bit in misa to indicate whether an MMU exists or not 76 so a cpu features bitfield is required, likewise for optional PMP support */ 77 enum { 78 RISCV_FEATURE_MMU, 79 RISCV_FEATURE_PMP, 80 RISCV_FEATURE_EPMP, 81 RISCV_FEATURE_MISA, 82 RISCV_FEATURE_AIA 83 }; 84 85 #define PRIV_VERSION_1_10_0 0x00011000 86 #define PRIV_VERSION_1_11_0 0x00011100 87 88 #define VEXT_VERSION_1_00_0 0x00010000 89 90 enum { 91 TRANSLATE_SUCCESS, 92 TRANSLATE_FAIL, 93 TRANSLATE_PMP_FAIL, 94 TRANSLATE_G_STAGE_FAIL 95 }; 96 97 #define MMU_USER_IDX 3 98 99 #define MAX_RISCV_PMPS (16) 100 101 typedef struct CPURISCVState CPURISCVState; 102 103 #if !defined(CONFIG_USER_ONLY) 104 #include "pmp.h" 105 #endif 106 107 #define RV_VLEN_MAX 1024 108 109 FIELD(VTYPE, VLMUL, 0, 3) 110 FIELD(VTYPE, VSEW, 3, 3) 111 FIELD(VTYPE, VTA, 6, 1) 112 FIELD(VTYPE, VMA, 7, 1) 113 FIELD(VTYPE, VEDIV, 8, 2) 114 FIELD(VTYPE, RESERVED, 10, sizeof(target_ulong) * 8 - 11) 115 116 struct CPURISCVState { 117 target_ulong gpr[32]; 118 target_ulong gprh[32]; /* 64 top bits of the 128-bit registers */ 119 uint64_t fpr[32]; /* assume both F and D extensions */ 120 121 /* vector coprocessor state. */ 122 uint64_t vreg[32 * RV_VLEN_MAX / 64] QEMU_ALIGNED(16); 123 target_ulong vxrm; 124 target_ulong vxsat; 125 target_ulong vl; 126 target_ulong vstart; 127 target_ulong vtype; 128 bool vill; 129 130 target_ulong pc; 131 target_ulong load_res; 132 target_ulong load_val; 133 134 target_ulong frm; 135 136 target_ulong badaddr; 137 uint32_t bins; 138 139 target_ulong guest_phys_fault_addr; 140 141 target_ulong priv_ver; 142 target_ulong bext_ver; 143 target_ulong vext_ver; 144 145 /* RISCVMXL, but uint32_t for vmstate migration */ 146 uint32_t misa_mxl; /* current mxl */ 147 uint32_t misa_mxl_max; /* max mxl for this cpu */ 148 uint32_t misa_ext; /* current extensions */ 149 uint32_t misa_ext_mask; /* max ext for this cpu */ 150 uint32_t xl; /* current xlen */ 151 152 /* 128-bit helpers upper part return value */ 153 target_ulong retxh; 154 155 uint32_t features; 156 157 #ifdef CONFIG_USER_ONLY 158 uint32_t elf_flags; 159 #endif 160 161 #ifndef CONFIG_USER_ONLY 162 target_ulong priv; 163 /* This contains QEMU specific information about the virt state. */ 164 target_ulong virt; 165 target_ulong geilen; 166 target_ulong resetvec; 167 168 target_ulong mhartid; 169 /* 170 * For RV32 this is 32-bit mstatus and 32-bit mstatush. 171 * For RV64 this is a 64-bit mstatus. 172 */ 173 uint64_t mstatus; 174 175 target_ulong mip; 176 177 uint32_t miclaim; 178 179 target_ulong mie; 180 target_ulong mideleg; 181 182 target_ulong satp; /* since: priv-1.10.0 */ 183 target_ulong stval; 184 target_ulong medeleg; 185 186 target_ulong stvec; 187 target_ulong sepc; 188 target_ulong scause; 189 190 target_ulong mtvec; 191 target_ulong mepc; 192 target_ulong mcause; 193 target_ulong mtval; /* since: priv-1.10.0 */ 194 195 /* Machine and Supervisor interrupt priorities */ 196 uint8_t miprio[64]; 197 uint8_t siprio[64]; 198 199 /* Hypervisor CSRs */ 200 target_ulong hstatus; 201 target_ulong hedeleg; 202 target_ulong hideleg; 203 target_ulong hcounteren; 204 target_ulong htval; 205 target_ulong htinst; 206 target_ulong hgatp; 207 target_ulong hgeie; 208 target_ulong hgeip; 209 uint64_t htimedelta; 210 211 /* Hypervisor controlled virtual interrupt priorities */ 212 uint8_t hviprio[64]; 213 214 /* Upper 64-bits of 128-bit CSRs */ 215 uint64_t mscratchh; 216 uint64_t sscratchh; 217 218 /* Virtual CSRs */ 219 /* 220 * For RV32 this is 32-bit vsstatus and 32-bit vsstatush. 221 * For RV64 this is a 64-bit vsstatus. 222 */ 223 uint64_t vsstatus; 224 target_ulong vstvec; 225 target_ulong vsscratch; 226 target_ulong vsepc; 227 target_ulong vscause; 228 target_ulong vstval; 229 target_ulong vsatp; 230 231 target_ulong mtval2; 232 target_ulong mtinst; 233 234 /* HS Backup CSRs */ 235 target_ulong stvec_hs; 236 target_ulong sscratch_hs; 237 target_ulong sepc_hs; 238 target_ulong scause_hs; 239 target_ulong stval_hs; 240 target_ulong satp_hs; 241 uint64_t mstatus_hs; 242 243 /* Signals whether the current exception occurred with two-stage address 244 translation active. */ 245 bool two_stage_lookup; 246 247 target_ulong scounteren; 248 target_ulong mcounteren; 249 250 target_ulong sscratch; 251 target_ulong mscratch; 252 253 /* temporary htif regs */ 254 uint64_t mfromhost; 255 uint64_t mtohost; 256 uint64_t timecmp; 257 258 /* physical memory protection */ 259 pmp_table_t pmp_state; 260 target_ulong mseccfg; 261 262 /* machine specific rdtime callback */ 263 uint64_t (*rdtime_fn)(uint32_t); 264 uint32_t rdtime_fn_arg; 265 266 /* machine specific AIA ireg read-modify-write callback */ 267 #define AIA_MAKE_IREG(__isel, __priv, __virt, __vgein, __xlen) \ 268 ((((__xlen) & 0xff) << 24) | \ 269 (((__vgein) & 0x3f) << 20) | \ 270 (((__virt) & 0x1) << 18) | \ 271 (((__priv) & 0x3) << 16) | \ 272 (__isel & 0xffff)) 273 #define AIA_IREG_ISEL(__ireg) ((__ireg) & 0xffff) 274 #define AIA_IREG_PRIV(__ireg) (((__ireg) >> 16) & 0x3) 275 #define AIA_IREG_VIRT(__ireg) (((__ireg) >> 18) & 0x1) 276 #define AIA_IREG_VGEIN(__ireg) (((__ireg) >> 20) & 0x3f) 277 #define AIA_IREG_XLEN(__ireg) (((__ireg) >> 24) & 0xff) 278 int (*aia_ireg_rmw_fn[4])(void *arg, target_ulong reg, 279 target_ulong *val, target_ulong new_val, target_ulong write_mask); 280 void *aia_ireg_rmw_fn_arg[4]; 281 282 /* True if in debugger mode. */ 283 bool debugger; 284 285 /* 286 * CSRs for PointerMasking extension 287 */ 288 target_ulong mmte; 289 target_ulong mpmmask; 290 target_ulong mpmbase; 291 target_ulong spmmask; 292 target_ulong spmbase; 293 target_ulong upmmask; 294 target_ulong upmbase; 295 #endif 296 target_ulong cur_pmmask; 297 target_ulong cur_pmbase; 298 299 float_status fp_status; 300 301 /* Fields from here on are preserved across CPU reset. */ 302 QEMUTimer *timer; /* Internal timer */ 303 304 hwaddr kernel_addr; 305 hwaddr fdt_addr; 306 307 /* kvm timer */ 308 bool kvm_timer_dirty; 309 uint64_t kvm_timer_time; 310 uint64_t kvm_timer_compare; 311 uint64_t kvm_timer_state; 312 uint64_t kvm_timer_frequency; 313 }; 314 315 OBJECT_DECLARE_TYPE(RISCVCPU, RISCVCPUClass, 316 RISCV_CPU) 317 318 /** 319 * RISCVCPUClass: 320 * @parent_realize: The parent class' realize handler. 321 * @parent_reset: The parent class' reset handler. 322 * 323 * A RISCV CPU model. 324 */ 325 struct RISCVCPUClass { 326 /*< private >*/ 327 CPUClass parent_class; 328 /*< public >*/ 329 DeviceRealize parent_realize; 330 DeviceReset parent_reset; 331 }; 332 333 struct RISCVCPUConfig { 334 bool ext_i; 335 bool ext_e; 336 bool ext_g; 337 bool ext_m; 338 bool ext_a; 339 bool ext_f; 340 bool ext_d; 341 bool ext_c; 342 bool ext_s; 343 bool ext_u; 344 bool ext_h; 345 bool ext_j; 346 bool ext_v; 347 bool ext_zba; 348 bool ext_zbb; 349 bool ext_zbc; 350 bool ext_zbs; 351 bool ext_counters; 352 bool ext_ifencei; 353 bool ext_icsr; 354 bool ext_zfh; 355 bool ext_zfhmin; 356 bool ext_zve32f; 357 bool ext_zve64f; 358 359 /* Vendor-specific custom extensions */ 360 bool ext_XVentanaCondOps; 361 362 char *priv_spec; 363 char *user_spec; 364 char *bext_spec; 365 char *vext_spec; 366 uint16_t vlen; 367 uint16_t elen; 368 bool mmu; 369 bool pmp; 370 bool epmp; 371 uint64_t resetvec; 372 }; 373 374 typedef struct RISCVCPUConfig RISCVCPUConfig; 375 376 /** 377 * RISCVCPU: 378 * @env: #CPURISCVState 379 * 380 * A RISCV CPU. 381 */ 382 struct RISCVCPU { 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 }; 395 396 static inline int riscv_has_ext(CPURISCVState *env, target_ulong ext) 397 { 398 return (env->misa_ext & ext) != 0; 399 } 400 401 static inline bool riscv_feature(CPURISCVState *env, int feature) 402 { 403 return env->features & (1ULL << feature); 404 } 405 406 static inline void riscv_set_feature(CPURISCVState *env, int feature) 407 { 408 env->features |= (1ULL << feature); 409 } 410 411 #include "cpu_user.h" 412 413 extern const char * const riscv_int_regnames[]; 414 extern const char * const riscv_int_regnamesh[]; 415 extern const char * const riscv_fpr_regnames[]; 416 417 const char *riscv_cpu_get_trap_name(target_ulong cause, bool async); 418 void riscv_cpu_do_interrupt(CPUState *cpu); 419 int riscv_cpu_write_elf64_note(WriteCoreDumpFunction f, CPUState *cs, 420 int cpuid, void *opaque); 421 int riscv_cpu_write_elf32_note(WriteCoreDumpFunction f, CPUState *cs, 422 int cpuid, void *opaque); 423 int riscv_cpu_gdb_read_register(CPUState *cpu, GByteArray *buf, int reg); 424 int riscv_cpu_gdb_write_register(CPUState *cpu, uint8_t *buf, int reg); 425 int riscv_cpu_hviprio_index2irq(int index, int *out_irq, int *out_rdzero); 426 uint8_t riscv_cpu_default_priority(int irq); 427 int riscv_cpu_mirq_pending(CPURISCVState *env); 428 int riscv_cpu_sirq_pending(CPURISCVState *env); 429 int riscv_cpu_vsirq_pending(CPURISCVState *env); 430 bool riscv_cpu_fp_enabled(CPURISCVState *env); 431 target_ulong riscv_cpu_get_geilen(CPURISCVState *env); 432 void riscv_cpu_set_geilen(CPURISCVState *env, target_ulong geilen); 433 bool riscv_cpu_vector_enabled(CPURISCVState *env); 434 bool riscv_cpu_virt_enabled(CPURISCVState *env); 435 void riscv_cpu_set_virt_enabled(CPURISCVState *env, bool enable); 436 bool riscv_cpu_two_stage_lookup(int mmu_idx); 437 int riscv_cpu_mmu_index(CPURISCVState *env, bool ifetch); 438 hwaddr riscv_cpu_get_phys_page_debug(CPUState *cpu, vaddr addr); 439 void riscv_cpu_do_unaligned_access(CPUState *cs, vaddr addr, 440 MMUAccessType access_type, int mmu_idx, 441 uintptr_t retaddr) QEMU_NORETURN; 442 bool riscv_cpu_tlb_fill(CPUState *cs, vaddr address, int size, 443 MMUAccessType access_type, int mmu_idx, 444 bool probe, uintptr_t retaddr); 445 void riscv_cpu_do_transaction_failed(CPUState *cs, hwaddr physaddr, 446 vaddr addr, unsigned size, 447 MMUAccessType access_type, 448 int mmu_idx, MemTxAttrs attrs, 449 MemTxResult response, uintptr_t retaddr); 450 char *riscv_isa_string(RISCVCPU *cpu); 451 void riscv_cpu_list(void); 452 453 #define cpu_list riscv_cpu_list 454 #define cpu_mmu_index riscv_cpu_mmu_index 455 456 #ifndef CONFIG_USER_ONLY 457 bool riscv_cpu_exec_interrupt(CPUState *cs, int interrupt_request); 458 void riscv_cpu_swap_hypervisor_regs(CPURISCVState *env); 459 int riscv_cpu_claim_interrupts(RISCVCPU *cpu, uint32_t interrupts); 460 uint32_t riscv_cpu_update_mip(RISCVCPU *cpu, uint32_t mask, uint32_t value); 461 #define BOOL_TO_MASK(x) (-!!(x)) /* helper for riscv_cpu_update_mip value */ 462 void riscv_cpu_set_rdtime_fn(CPURISCVState *env, uint64_t (*fn)(uint32_t), 463 uint32_t arg); 464 void riscv_cpu_set_aia_ireg_rmw_fn(CPURISCVState *env, uint32_t priv, 465 int (*rmw_fn)(void *arg, 466 target_ulong reg, 467 target_ulong *val, 468 target_ulong new_val, 469 target_ulong write_mask), 470 void *rmw_fn_arg); 471 #endif 472 void riscv_cpu_set_mode(CPURISCVState *env, target_ulong newpriv); 473 474 void riscv_translate_init(void); 475 void QEMU_NORETURN riscv_raise_exception(CPURISCVState *env, 476 uint32_t exception, uintptr_t pc); 477 478 target_ulong riscv_cpu_get_fflags(CPURISCVState *env); 479 void riscv_cpu_set_fflags(CPURISCVState *env, target_ulong); 480 481 #define TB_FLAGS_PRIV_MMU_MASK 3 482 #define TB_FLAGS_PRIV_HYP_ACCESS_MASK (1 << 2) 483 #define TB_FLAGS_MSTATUS_FS MSTATUS_FS 484 #define TB_FLAGS_MSTATUS_VS MSTATUS_VS 485 486 typedef CPURISCVState CPUArchState; 487 typedef RISCVCPU ArchCPU; 488 #include "exec/cpu-all.h" 489 490 FIELD(TB_FLAGS, MEM_IDX, 0, 3) 491 FIELD(TB_FLAGS, LMUL, 3, 3) 492 FIELD(TB_FLAGS, SEW, 6, 3) 493 /* Skip MSTATUS_VS (0x600) bits */ 494 FIELD(TB_FLAGS, VL_EQ_VLMAX, 11, 1) 495 FIELD(TB_FLAGS, VILL, 12, 1) 496 /* Skip MSTATUS_FS (0x6000) bits */ 497 /* Is a Hypervisor instruction load/store allowed? */ 498 FIELD(TB_FLAGS, HLSX, 15, 1) 499 FIELD(TB_FLAGS, MSTATUS_HS_FS, 16, 2) 500 FIELD(TB_FLAGS, MSTATUS_HS_VS, 18, 2) 501 /* The combination of MXL/SXL/UXL that applies to the current cpu mode. */ 502 FIELD(TB_FLAGS, XL, 20, 2) 503 /* If PointerMasking should be applied */ 504 FIELD(TB_FLAGS, PM_MASK_ENABLED, 22, 1) 505 FIELD(TB_FLAGS, PM_BASE_ENABLED, 23, 1) 506 507 #ifdef TARGET_RISCV32 508 #define riscv_cpu_mxl(env) ((void)(env), MXL_RV32) 509 #else 510 static inline RISCVMXL riscv_cpu_mxl(CPURISCVState *env) 511 { 512 return env->misa_mxl; 513 } 514 #endif 515 516 #if defined(TARGET_RISCV32) 517 #define cpu_recompute_xl(env) ((void)(env), MXL_RV32) 518 #else 519 static inline RISCVMXL cpu_recompute_xl(CPURISCVState *env) 520 { 521 RISCVMXL xl = env->misa_mxl; 522 #if !defined(CONFIG_USER_ONLY) 523 /* 524 * When emulating a 32-bit-only cpu, use RV32. 525 * When emulating a 64-bit cpu, and MXL has been reduced to RV32, 526 * MSTATUSH doesn't have UXL/SXL, therefore XLEN cannot be widened 527 * back to RV64 for lower privs. 528 */ 529 if (xl != MXL_RV32) { 530 switch (env->priv) { 531 case PRV_M: 532 break; 533 case PRV_U: 534 xl = get_field(env->mstatus, MSTATUS64_UXL); 535 break; 536 default: /* PRV_S | PRV_H */ 537 xl = get_field(env->mstatus, MSTATUS64_SXL); 538 break; 539 } 540 } 541 #endif 542 return xl; 543 } 544 #endif 545 546 static inline int riscv_cpu_xlen(CPURISCVState *env) 547 { 548 return 16 << env->xl; 549 } 550 551 /* 552 * Encode LMUL to lmul as follows: 553 * LMUL vlmul lmul 554 * 1 000 0 555 * 2 001 1 556 * 4 010 2 557 * 8 011 3 558 * - 100 - 559 * 1/8 101 -3 560 * 1/4 110 -2 561 * 1/2 111 -1 562 * 563 * then, we can calculate VLMAX = vlen >> (vsew + 3 - lmul) 564 * e.g. vlen = 256 bits, SEW = 16, LMUL = 1/8 565 * => VLMAX = vlen >> (1 + 3 - (-3)) 566 * = 256 >> 7 567 * = 2 568 */ 569 static inline uint32_t vext_get_vlmax(RISCVCPU *cpu, target_ulong vtype) 570 { 571 uint8_t sew = FIELD_EX64(vtype, VTYPE, VSEW); 572 int8_t lmul = sextract32(FIELD_EX64(vtype, VTYPE, VLMUL), 0, 3); 573 return cpu->cfg.vlen >> (sew + 3 - lmul); 574 } 575 576 void cpu_get_tb_cpu_state(CPURISCVState *env, target_ulong *pc, 577 target_ulong *cs_base, uint32_t *pflags); 578 579 void riscv_cpu_update_mask(CPURISCVState *env); 580 581 RISCVException riscv_csrrw(CPURISCVState *env, int csrno, 582 target_ulong *ret_value, 583 target_ulong new_value, target_ulong write_mask); 584 RISCVException riscv_csrrw_debug(CPURISCVState *env, int csrno, 585 target_ulong *ret_value, 586 target_ulong new_value, 587 target_ulong write_mask); 588 589 static inline void riscv_csr_write(CPURISCVState *env, int csrno, 590 target_ulong val) 591 { 592 riscv_csrrw(env, csrno, NULL, val, MAKE_64BIT_MASK(0, TARGET_LONG_BITS)); 593 } 594 595 static inline target_ulong riscv_csr_read(CPURISCVState *env, int csrno) 596 { 597 target_ulong val = 0; 598 riscv_csrrw(env, csrno, &val, 0, 0); 599 return val; 600 } 601 602 typedef RISCVException (*riscv_csr_predicate_fn)(CPURISCVState *env, 603 int csrno); 604 typedef RISCVException (*riscv_csr_read_fn)(CPURISCVState *env, int csrno, 605 target_ulong *ret_value); 606 typedef RISCVException (*riscv_csr_write_fn)(CPURISCVState *env, int csrno, 607 target_ulong new_value); 608 typedef RISCVException (*riscv_csr_op_fn)(CPURISCVState *env, int csrno, 609 target_ulong *ret_value, 610 target_ulong new_value, 611 target_ulong write_mask); 612 613 RISCVException riscv_csrrw_i128(CPURISCVState *env, int csrno, 614 Int128 *ret_value, 615 Int128 new_value, Int128 write_mask); 616 617 typedef RISCVException (*riscv_csr_read128_fn)(CPURISCVState *env, int csrno, 618 Int128 *ret_value); 619 typedef RISCVException (*riscv_csr_write128_fn)(CPURISCVState *env, int csrno, 620 Int128 new_value); 621 622 typedef struct { 623 const char *name; 624 riscv_csr_predicate_fn predicate; 625 riscv_csr_read_fn read; 626 riscv_csr_write_fn write; 627 riscv_csr_op_fn op; 628 riscv_csr_read128_fn read128; 629 riscv_csr_write128_fn write128; 630 } riscv_csr_operations; 631 632 /* CSR function table constants */ 633 enum { 634 CSR_TABLE_SIZE = 0x1000 635 }; 636 637 /* CSR function table */ 638 extern riscv_csr_operations csr_ops[CSR_TABLE_SIZE]; 639 640 void riscv_get_csr_ops(int csrno, riscv_csr_operations *ops); 641 void riscv_set_csr_ops(int csrno, riscv_csr_operations *ops); 642 643 void riscv_cpu_register_gdb_regs_for_features(CPUState *cs); 644 645 #endif /* RISCV_CPU_H */ 646