target/xtensa/cpu.h

   1 /*
   2  * Copyright (c) 2011, Max Filippov, Open Source and Linux Lab.
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions are met:
   7  *     * Redistributions of source code must retain the above copyright
   8  *       notice, this list of conditions and the following disclaimer.
   9  *     * Redistributions in binary form must reproduce the above copyright
  10  *       notice, this list of conditions and the following disclaimer in the
  11  *       documentation and/or other materials provided with the distribution.
  12  *     * Neither the name of the Open Source and Linux Lab nor the
  13  *       names of its contributors may be used to endorse or promote products
  14  *       derived from this software without specific prior written permission.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  17  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  19  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
  20  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  21  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  22  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  23  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  24  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  25  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  26  */
  27
  28 #ifndef XTENSA_CPU_H
  29 #define XTENSA_CPU_H
  30
  31 #define ALIGNED_ONLY
  32 #define TARGET_LONG_BITS 32
  33
  34 #define CPUArchState struct CPUXtensaState
  35
  36 #include "qemu-common.h"
  37 #include "cpu-qom.h"
  38 #include "exec/cpu-defs.h"
  39 #include "fpu/softfloat.h"
  40
  41 #define NB_MMU_MODES 4
  42
  43 #define TARGET_PHYS_ADDR_SPACE_BITS 32
  44 #define TARGET_VIRT_ADDR_SPACE_BITS 32
  45 #define TARGET_PAGE_BITS 12
  46
  47 enum {
  48     /* Additional instructions */
  49     XTENSA_OPTION_CODE_DENSITY,
  50     XTENSA_OPTION_LOOP,
  51     XTENSA_OPTION_EXTENDED_L32R,
  52     XTENSA_OPTION_16_BIT_IMUL,
  53     XTENSA_OPTION_32_BIT_IMUL,
  54     XTENSA_OPTION_32_BIT_IMUL_HIGH,
  55     XTENSA_OPTION_32_BIT_IDIV,
  56     XTENSA_OPTION_MAC16,
  57     XTENSA_OPTION_MISC_OP_NSA,
  58     XTENSA_OPTION_MISC_OP_MINMAX,
  59     XTENSA_OPTION_MISC_OP_SEXT,
  60     XTENSA_OPTION_MISC_OP_CLAMPS,
  61     XTENSA_OPTION_COPROCESSOR,
  62     XTENSA_OPTION_BOOLEAN,
  63     XTENSA_OPTION_FP_COPROCESSOR,
  64     XTENSA_OPTION_MP_SYNCHRO,
  65     XTENSA_OPTION_CONDITIONAL_STORE,
  66     XTENSA_OPTION_ATOMCTL,
  67     XTENSA_OPTION_DEPBITS,
  68
  69     /* Interrupts and exceptions */
  70     XTENSA_OPTION_EXCEPTION,
  71     XTENSA_OPTION_RELOCATABLE_VECTOR,
  72     XTENSA_OPTION_UNALIGNED_EXCEPTION,
  73     XTENSA_OPTION_INTERRUPT,
  74     XTENSA_OPTION_HIGH_PRIORITY_INTERRUPT,
  75     XTENSA_OPTION_TIMER_INTERRUPT,
  76
  77     /* Local memory */
  78     XTENSA_OPTION_ICACHE,
  79     XTENSA_OPTION_ICACHE_TEST,
  80     XTENSA_OPTION_ICACHE_INDEX_LOCK,
  81     XTENSA_OPTION_DCACHE,
  82     XTENSA_OPTION_DCACHE_TEST,
  83     XTENSA_OPTION_DCACHE_INDEX_LOCK,
  84     XTENSA_OPTION_IRAM,
  85     XTENSA_OPTION_IROM,
  86     XTENSA_OPTION_DRAM,
  87     XTENSA_OPTION_DROM,
  88     XTENSA_OPTION_XLMI,
  89     XTENSA_OPTION_HW_ALIGNMENT,
  90     XTENSA_OPTION_MEMORY_ECC_PARITY,
  91
  92     /* Memory protection and translation */
  93     XTENSA_OPTION_REGION_PROTECTION,
  94     XTENSA_OPTION_REGION_TRANSLATION,
  95     XTENSA_OPTION_MMU,
  96     XTENSA_OPTION_CACHEATTR,
  97
  98     /* Other */
  99     XTENSA_OPTION_WINDOWED_REGISTER,
 100     XTENSA_OPTION_PROCESSOR_INTERFACE,
 101     XTENSA_OPTION_MISC_SR,
 102     XTENSA_OPTION_THREAD_POINTER,
 103     XTENSA_OPTION_PROCESSOR_ID,
 104     XTENSA_OPTION_DEBUG,
 105     XTENSA_OPTION_TRACE_PORT,
 106     XTENSA_OPTION_EXTERN_REGS,
 107 };
 108
 109 enum {
 110     THREADPTR = 231,
 111     FCR = 232,
 112     FSR = 233,
 113 };
 114
 115 enum {
 116     LBEG = 0,
 117     LEND = 1,
 118     LCOUNT = 2,
 119     SAR = 3,
 120     BR = 4,
 121     LITBASE = 5,
 122     SCOMPARE1 = 12,
 123     ACCLO = 16,
 124     ACCHI = 17,
 125     MR = 32,
 126     WINDOW_BASE = 72,
 127     WINDOW_START = 73,
 128     PTEVADDR = 83,
 129     RASID = 90,
 130     ITLBCFG = 91,
 131     DTLBCFG = 92,
 132     IBREAKENABLE = 96,
 133     MEMCTL = 97,
 134     CACHEATTR = 98,
 135     ATOMCTL = 99,
 136     IBREAKA = 128,
 137     DBREAKA = 144,
 138     DBREAKC = 160,
 139     CONFIGID0 = 176,
 140     EPC1 = 177,
 141     DEPC = 192,
 142     EPS2 = 194,
 143     CONFIGID1 = 208,
 144     EXCSAVE1 = 209,
 145     CPENABLE = 224,
 146     INTSET = 226,
 147     INTCLEAR = 227,
 148     INTENABLE = 228,
 149     PS = 230,
 150     VECBASE = 231,
 151     EXCCAUSE = 232,
 152     DEBUGCAUSE = 233,
 153     CCOUNT = 234,
 154     PRID = 235,
 155     ICOUNT = 236,
 156     ICOUNTLEVEL = 237,
 157     EXCVADDR = 238,
 158     CCOMPARE = 240,
 159     MISC = 244,
 160 };
 161
 162 #define PS_INTLEVEL 0xf
 163 #define PS_INTLEVEL_SHIFT 0
 164
 165 #define PS_EXCM 0x10
 166 #define PS_UM 0x20
 167
 168 #define PS_RING 0xc0
 169 #define PS_RING_SHIFT 6
 170
 171 #define PS_OWB 0xf00
 172 #define PS_OWB_SHIFT 8
 173
 174 #define PS_CALLINC 0x30000
 175 #define PS_CALLINC_SHIFT 16
 176 #define PS_CALLINC_LEN 2
 177
 178 #define PS_WOE 0x40000
 179
 180 #define DEBUGCAUSE_IC 0x1
 181 #define DEBUGCAUSE_IB 0x2
 182 #define DEBUGCAUSE_DB 0x4
 183 #define DEBUGCAUSE_BI 0x8
 184 #define DEBUGCAUSE_BN 0x10
 185 #define DEBUGCAUSE_DI 0x20
 186 #define DEBUGCAUSE_DBNUM 0xf00
 187 #define DEBUGCAUSE_DBNUM_SHIFT 8
 188
 189 #define DBREAKC_SB 0x80000000
 190 #define DBREAKC_LB 0x40000000
 191 #define DBREAKC_SB_LB (DBREAKC_SB | DBREAKC_LB)
 192 #define DBREAKC_MASK 0x3f
 193
 194 #define MEMCTL_INIT 0x00800000
 195 #define MEMCTL_IUSEWAYS_SHIFT 18
 196 #define MEMCTL_IUSEWAYS_LEN 5
 197 #define MEMCTL_IUSEWAYS_MASK 0x007c0000
 198 #define MEMCTL_DALLOCWAYS_SHIFT 13
 199 #define MEMCTL_DALLOCWAYS_LEN 5
 200 #define MEMCTL_DALLOCWAYS_MASK 0x0003e000
 201 #define MEMCTL_DUSEWAYS_SHIFT 8
 202 #define MEMCTL_DUSEWAYS_LEN 5
 203 #define MEMCTL_DUSEWAYS_MASK 0x00001f00
 204 #define MEMCTL_ISNP 0x4
 205 #define MEMCTL_DSNP 0x2
 206 #define MEMCTL_IL0EN 0x1
 207
 208 #define MAX_NAREG 64
 209 #define MAX_NINTERRUPT 32
 210 #define MAX_NLEVEL 6
 211 #define MAX_NNMI 1
 212 #define MAX_NCCOMPARE 3
 213 #define MAX_TLB_WAY_SIZE 8
 214 #define MAX_NDBREAK 2
 215 #define MAX_NMEMORY 4
 216
 217 #define REGION_PAGE_MASK 0xe0000000
 218
 219 #define PAGE_CACHE_MASK    0x700
 220 #define PAGE_CACHE_SHIFT   8
 221 #define PAGE_CACHE_INVALID 0x000
 222 #define PAGE_CACHE_BYPASS  0x100
 223 #define PAGE_CACHE_WT      0x200
 224 #define PAGE_CACHE_WB      0x400
 225 #define PAGE_CACHE_ISOLATE 0x600
 226
 227 enum {
 228     /* Static vectors */
 229     EXC_RESET0,
 230     EXC_RESET1,
 231     EXC_MEMORY_ERROR,
 232
 233     /* Dynamic vectors */
 234     EXC_WINDOW_OVERFLOW4,
 235     EXC_WINDOW_UNDERFLOW4,
 236     EXC_WINDOW_OVERFLOW8,
 237     EXC_WINDOW_UNDERFLOW8,
 238     EXC_WINDOW_OVERFLOW12,
 239     EXC_WINDOW_UNDERFLOW12,
 240     EXC_IRQ,
 241     EXC_KERNEL,
 242     EXC_USER,
 243     EXC_DOUBLE,
 244     EXC_DEBUG,
 245     EXC_MAX
 246 };
 247
 248 enum {
 249     ILLEGAL_INSTRUCTION_CAUSE = 0,
 250     SYSCALL_CAUSE,
 251     INSTRUCTION_FETCH_ERROR_CAUSE,
 252     LOAD_STORE_ERROR_CAUSE,
 253     LEVEL1_INTERRUPT_CAUSE,
 254     ALLOCA_CAUSE,
 255     INTEGER_DIVIDE_BY_ZERO_CAUSE,
 256     PRIVILEGED_CAUSE = 8,
 257     LOAD_STORE_ALIGNMENT_CAUSE,
 258
 259     INSTR_PIF_DATA_ERROR_CAUSE = 12,
 260     LOAD_STORE_PIF_DATA_ERROR_CAUSE,
 261     INSTR_PIF_ADDR_ERROR_CAUSE,
 262     LOAD_STORE_PIF_ADDR_ERROR_CAUSE,
 263
 264     INST_TLB_MISS_CAUSE,
 265     INST_TLB_MULTI_HIT_CAUSE,
 266     INST_FETCH_PRIVILEGE_CAUSE,
 267     INST_FETCH_PROHIBITED_CAUSE = 20,
 268     LOAD_STORE_TLB_MISS_CAUSE = 24,
 269     LOAD_STORE_TLB_MULTI_HIT_CAUSE,
 270     LOAD_STORE_PRIVILEGE_CAUSE,
 271     LOAD_PROHIBITED_CAUSE = 28,
 272     STORE_PROHIBITED_CAUSE,
 273
 274     COPROCESSOR0_DISABLED = 32,
 275 };
 276
 277 typedef enum {
 278     INTTYPE_LEVEL,
 279     INTTYPE_EDGE,
 280     INTTYPE_NMI,
 281     INTTYPE_SOFTWARE,
 282     INTTYPE_TIMER,
 283     INTTYPE_DEBUG,
 284     INTTYPE_WRITE_ERR,
 285     INTTYPE_PROFILING,
 286     INTTYPE_MAX
 287 } interrupt_type;
 288
 289 struct CPUXtensaState;
 290
 291 typedef struct xtensa_tlb_entry {
 292     uint32_t vaddr;
 293     uint32_t paddr;
 294     uint8_t asid;
 295     uint8_t attr;
 296     bool variable;
 297 } xtensa_tlb_entry;
 298
 299 typedef struct xtensa_tlb {
 300     unsigned nways;
 301     const unsigned way_size[10];
 302     bool varway56;
 303     unsigned nrefillentries;
 304 } xtensa_tlb;
 305
 306 typedef struct XtensaGdbReg {
 307     int targno;
 308     int type;
 309     int group;
 310     unsigned size;
 311 } XtensaGdbReg;
 312
 313 typedef struct XtensaGdbRegmap {
 314     int num_regs;
 315     int num_core_regs;
 316     /* PC + a + ar + sr + ur */
 317     XtensaGdbReg reg[1 + 16 + 64 + 256 + 256];
 318 } XtensaGdbRegmap;
 319
 320 typedef struct XtensaCcompareTimer {
 321     struct CPUXtensaState *env;
 322     QEMUTimer *timer;
 323 } XtensaCcompareTimer;
 324
 325 typedef struct XtensaMemory {
 326     unsigned num;
 327     struct XtensaMemoryRegion {
 328         uint32_t addr;
 329         uint32_t size;
 330     } location[MAX_NMEMORY];
 331 } XtensaMemory;
 332
 333 struct XtensaConfig {
 334     const char *name;
 335     uint64_t options;
 336     XtensaGdbRegmap gdb_regmap;
 337     unsigned nareg;
 338     int excm_level;
 339     int ndepc;
 340     uint32_t vecbase;
 341     uint32_t exception_vector[EXC_MAX];
 342     unsigned ninterrupt;
 343     unsigned nlevel;
 344     uint32_t interrupt_vector[MAX_NLEVEL + MAX_NNMI + 1];
 345     uint32_t level_mask[MAX_NLEVEL + MAX_NNMI + 1];
 346     uint32_t inttype_mask[INTTYPE_MAX];
 347     struct {
 348         uint32_t level;
 349         interrupt_type inttype;
 350     } interrupt[MAX_NINTERRUPT];
 351     unsigned nccompare;
 352     uint32_t timerint[MAX_NCCOMPARE];
 353     unsigned nextint;
 354     unsigned extint[MAX_NINTERRUPT];
 355
 356     unsigned debug_level;
 357     unsigned nibreak;
 358     unsigned ndbreak;
 359
 360     unsigned icache_ways;
 361     unsigned dcache_ways;
 362     uint32_t memctl_mask;
 363
 364     XtensaMemory instrom;
 365     XtensaMemory instram;
 366     XtensaMemory datarom;
 367     XtensaMemory dataram;
 368     XtensaMemory sysrom;
 369     XtensaMemory sysram;
 370
 371     uint32_t configid[2];
 372
 373     uint32_t clock_freq_khz;
 374
 375     xtensa_tlb itlb;
 376     xtensa_tlb dtlb;
 377 };
 378
 379 typedef struct XtensaConfigList {
 380     const XtensaConfig *config;
 381     struct XtensaConfigList *next;
 382 } XtensaConfigList;
 383
 384 #ifdef HOST_WORDS_BIGENDIAN
 385 enum {
 386     FP_F32_HIGH,
 387     FP_F32_LOW,
 388 };
 389 #else
 390 enum {
 391     FP_F32_LOW,
 392     FP_F32_HIGH,
 393 };
 394 #endif
 395
 396 typedef struct CPUXtensaState {
 397     const XtensaConfig *config;
 398     uint32_t regs[16];
 399     uint32_t pc;
 400     uint32_t sregs[256];
 401     uint32_t uregs[256];
 402     uint32_t phys_regs[MAX_NAREG];
 403     union {
 404         float32 f32[2];
 405         float64 f64;
 406     } fregs[16];
 407     float_status fp_status;
 408
 409     xtensa_tlb_entry itlb[7][MAX_TLB_WAY_SIZE];
 410     xtensa_tlb_entry dtlb[10][MAX_TLB_WAY_SIZE];
 411     unsigned autorefill_idx;
 412     bool runstall;
 413     AddressSpace *address_space_er;
 414     MemoryRegion *system_er;
 415     int pending_irq_level; /* level of last raised IRQ */
 416     void **irq_inputs;
 417     XtensaCcompareTimer ccompare[MAX_NCCOMPARE];
 418     uint64_t time_base;
 419     uint64_t ccount_time;
 420     uint32_t ccount_base;
 421
 422     int exception_taken;
 423     int yield_needed;
 424     unsigned static_vectors;
 425
 426     /* Watchpoints for DBREAK registers */
 427     struct CPUWatchpoint *cpu_watchpoint[MAX_NDBREAK];
 428
 429     CPU_COMMON
 430 } CPUXtensaState;
 431
 432 /**
 433  * XtensaCPU:
 434  * @env: #CPUXtensaState
 435  *
 436  * An Xtensa CPU.
 437  */
 438 struct XtensaCPU {
 439     /*< private >*/
 440     CPUState parent_obj;
 441     /*< public >*/
 442
 443     CPUXtensaState env;
 444 };
 445
 446 static inline XtensaCPU *xtensa_env_get_cpu(const CPUXtensaState *env)
 447 {
 448     return container_of(env, XtensaCPU, env);
 449 }
 450
 451 #define ENV_GET_CPU(e) CPU(xtensa_env_get_cpu(e))
 452
 453 #define ENV_OFFSET offsetof(XtensaCPU, env)
 454
 455 void xtensa_cpu_do_interrupt(CPUState *cpu);
 456 bool xtensa_cpu_exec_interrupt(CPUState *cpu, int interrupt_request);
 457 void xtensa_cpu_do_unassigned_access(CPUState *cpu, hwaddr addr,
 458                                      bool is_write, bool is_exec, int opaque,
 459                                      unsigned size);
 460 void xtensa_cpu_dump_state(CPUState *cpu, FILE *f,
 461                            fprintf_function cpu_fprintf, int flags);
 462 hwaddr xtensa_cpu_get_phys_page_debug(CPUState *cpu, vaddr addr);
 463 int xtensa_cpu_gdb_read_register(CPUState *cpu, uint8_t *buf, int reg);
 464 int xtensa_cpu_gdb_write_register(CPUState *cpu, uint8_t *buf, int reg);
 465 void xtensa_cpu_do_unaligned_access(CPUState *cpu, vaddr addr,
 466                                     MMUAccessType access_type,
 467                                     int mmu_idx, uintptr_t retaddr);
 468
 469 #define cpu_signal_handler cpu_xtensa_signal_handler
 470 #define cpu_list xtensa_cpu_list
 471
 472 #ifdef TARGET_WORDS_BIGENDIAN
 473 #define XTENSA_DEFAULT_CPU_MODEL "fsf"
 474 #else
 475 #define XTENSA_DEFAULT_CPU_MODEL "dc232b"
 476 #endif
 477
 478 XtensaCPU *cpu_xtensa_init(const char *cpu_model);
 479
 480 #define cpu_init(cpu_model) CPU(cpu_xtensa_init(cpu_model))
 481
 482 void xtensa_translate_init(void);
 483 void xtensa_breakpoint_handler(CPUState *cs);
 484 void xtensa_finalize_config(XtensaConfig *config);
 485 void xtensa_register_core(XtensaConfigList *node);
 486 void check_interrupts(CPUXtensaState *s);
 487 void xtensa_irq_init(CPUXtensaState *env);
 488 void *xtensa_get_extint(CPUXtensaState *env, unsigned extint);
 489 void xtensa_timer_irq(CPUXtensaState *env, uint32_t id, uint32_t active);
 490 int cpu_xtensa_signal_handler(int host_signum, void *pinfo, void *puc);
 491 void xtensa_cpu_list(FILE *f, fprintf_function cpu_fprintf);
 492 void xtensa_sync_window_from_phys(CPUXtensaState *env);
 493 void xtensa_sync_phys_from_window(CPUXtensaState *env);
 494 uint32_t xtensa_tlb_get_addr_mask(const CPUXtensaState *env, bool dtlb, uint32_t way);
 495 void split_tlb_entry_spec_way(const CPUXtensaState *env, uint32_t v, bool dtlb,
 496         uint32_t *vpn, uint32_t wi, uint32_t *ei);
 497 int xtensa_tlb_lookup(const CPUXtensaState *env, uint32_t addr, bool dtlb,
 498         uint32_t *pwi, uint32_t *pei, uint8_t *pring);
 499 void xtensa_tlb_set_entry_mmu(const CPUXtensaState *env,
 500         xtensa_tlb_entry *entry, bool dtlb,
 501         unsigned wi, unsigned ei, uint32_t vpn, uint32_t pte);
 502 void xtensa_tlb_set_entry(CPUXtensaState *env, bool dtlb,
 503         unsigned wi, unsigned ei, uint32_t vpn, uint32_t pte);
 504 int xtensa_get_physical_addr(CPUXtensaState *env, bool update_tlb,
 505         uint32_t vaddr, int is_write, int mmu_idx,
 506         uint32_t *paddr, uint32_t *page_size, unsigned *access);
 507 void reset_mmu(CPUXtensaState *env);
 508 void dump_mmu(FILE *f, fprintf_function cpu_fprintf, CPUXtensaState *env);
 509 void debug_exception_env(CPUXtensaState *new_env, uint32_t cause);
 510 static inline MemoryRegion *xtensa_get_er_region(CPUXtensaState *env)
 511 {
 512     return env->system_er;
 513 }
 514
 515 static inline void xtensa_select_static_vectors(CPUXtensaState *env,
 516                                                 unsigned n)
 517 {
 518     assert(n < 2);
 519     env->static_vectors = n;
 520 }
 521 void xtensa_runstall(CPUXtensaState *env, bool runstall);
 522
 523 #define XTENSA_OPTION_BIT(opt) (((uint64_t)1) << (opt))
 524 #define XTENSA_OPTION_ALL (~(uint64_t)0)
 525
 526 static inline bool xtensa_option_bits_enabled(const XtensaConfig *config,
 527         uint64_t opt)
 528 {
 529     return (config->options & opt) != 0;
 530 }
 531
 532 static inline bool xtensa_option_enabled(const XtensaConfig *config, int opt)
 533 {
 534     return xtensa_option_bits_enabled(config, XTENSA_OPTION_BIT(opt));
 535 }
 536
 537 static inline int xtensa_get_cintlevel(const CPUXtensaState *env)
 538 {
 539     int level = (env->sregs[PS] & PS_INTLEVEL) >> PS_INTLEVEL_SHIFT;
 540     if ((env->sregs[PS] & PS_EXCM) && env->config->excm_level > level) {
 541         level = env->config->excm_level;
 542     }
 543     return level;
 544 }
 545
 546 static inline int xtensa_get_ring(const CPUXtensaState *env)
 547 {
 548     if (xtensa_option_enabled(env->config, XTENSA_OPTION_MMU)) {
 549         return (env->sregs[PS] & PS_RING) >> PS_RING_SHIFT;
 550     } else {
 551         return 0;
 552     }
 553 }
 554
 555 static inline int xtensa_get_cring(const CPUXtensaState *env)
 556 {
 557     if (xtensa_option_enabled(env->config, XTENSA_OPTION_MMU) &&
 558             (env->sregs[PS] & PS_EXCM) == 0) {
 559         return (env->sregs[PS] & PS_RING) >> PS_RING_SHIFT;
 560     } else {
 561         return 0;
 562     }
 563 }
 564
 565 static inline xtensa_tlb_entry *xtensa_tlb_get_entry(CPUXtensaState *env,
 566         bool dtlb, unsigned wi, unsigned ei)
 567 {
 568     return dtlb ?
 569         env->dtlb[wi] + ei :
 570         env->itlb[wi] + ei;
 571 }
 572
 573 static inline uint32_t xtensa_replicate_windowstart(CPUXtensaState *env)
 574 {
 575     return env->sregs[WINDOW_START] |
 576         (env->sregs[WINDOW_START] << env->config->nareg / 4);
 577 }
 578
 579 /* MMU modes definitions */
 580 #define MMU_MODE0_SUFFIX _ring0
 581 #define MMU_MODE1_SUFFIX _ring1
 582 #define MMU_MODE2_SUFFIX _ring2
 583 #define MMU_MODE3_SUFFIX _ring3
 584
 585 static inline int cpu_mmu_index(CPUXtensaState *env, bool ifetch)
 586 {
 587     return xtensa_get_cring(env);
 588 }
 589
 590 #define XTENSA_TBFLAG_RING_MASK 0x3
 591 #define XTENSA_TBFLAG_EXCM 0x4
 592 #define XTENSA_TBFLAG_LITBASE 0x8
 593 #define XTENSA_TBFLAG_DEBUG 0x10
 594 #define XTENSA_TBFLAG_ICOUNT 0x20
 595 #define XTENSA_TBFLAG_CPENABLE_MASK 0x3fc0
 596 #define XTENSA_TBFLAG_CPENABLE_SHIFT 6
 597 #define XTENSA_TBFLAG_EXCEPTION 0x4000
 598 #define XTENSA_TBFLAG_WINDOW_MASK 0x18000
 599 #define XTENSA_TBFLAG_WINDOW_SHIFT 15
 600 #define XTENSA_TBFLAG_YIELD 0x20000
 601
 602 static inline void cpu_get_tb_cpu_state(CPUXtensaState *env, target_ulong *pc,
 603         target_ulong *cs_base, uint32_t *flags)
 604 {
 605     CPUState *cs = CPU(xtensa_env_get_cpu(env));
 606
 607     *pc = env->pc;
 608     *cs_base = 0;
 609     *flags = 0;
 610     *flags |= xtensa_get_ring(env);
 611     if (env->sregs[PS] & PS_EXCM) {
 612         *flags |= XTENSA_TBFLAG_EXCM;
 613     }
 614     if (xtensa_option_enabled(env->config, XTENSA_OPTION_EXTENDED_L32R) &&
 615             (env->sregs[LITBASE] & 1)) {
 616         *flags |= XTENSA_TBFLAG_LITBASE;
 617     }
 618     if (xtensa_option_enabled(env->config, XTENSA_OPTION_DEBUG)) {
 619         if (xtensa_get_cintlevel(env) < env->config->debug_level) {
 620             *flags |= XTENSA_TBFLAG_DEBUG;
 621         }
 622         if (xtensa_get_cintlevel(env) < env->sregs[ICOUNTLEVEL]) {
 623             *flags |= XTENSA_TBFLAG_ICOUNT;
 624         }
 625     }
 626     if (xtensa_option_enabled(env->config, XTENSA_OPTION_COPROCESSOR)) {
 627         *flags |= env->sregs[CPENABLE] << XTENSA_TBFLAG_CPENABLE_SHIFT;
 628     }
 629     if (cs->singlestep_enabled && env->exception_taken) {
 630         *flags |= XTENSA_TBFLAG_EXCEPTION;
 631     }
 632     if (xtensa_option_enabled(env->config, XTENSA_OPTION_WINDOWED_REGISTER) &&
 633         (env->sregs[PS] & (PS_WOE | PS_EXCM)) == PS_WOE) {
 634         uint32_t windowstart = xtensa_replicate_windowstart(env) >>
 635             (env->sregs[WINDOW_BASE] + 1);
 636         uint32_t w = ctz32(windowstart | 0x8);
 637
 638         *flags |= w << XTENSA_TBFLAG_WINDOW_SHIFT;
 639     } else {
 640         *flags |= 3 << XTENSA_TBFLAG_WINDOW_SHIFT;
 641     }
 642     if (env->yield_needed) {
 643         *flags |= XTENSA_TBFLAG_YIELD;
 644     }
 645 }
 646
 647 #include "exec/cpu-all.h"
 648
 649 #endif