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 /* Xtensa processors have a weak memory model */
  35 #define TCG_GUEST_DEFAULT_MO      (0)
  36
  37 #define CPUArchState struct CPUXtensaState
  38
  39 #include "qemu-common.h"
  40 #include "cpu-qom.h"
  41 #include "exec/cpu-defs.h"
  42 #include "xtensa-isa.h"
  43
  44 #define NB_MMU_MODES 4
  45
  46 #define TARGET_PHYS_ADDR_SPACE_BITS 32
  47 #ifdef CONFIG_USER_ONLY
  48 #define TARGET_VIRT_ADDR_SPACE_BITS 30
  49 #else
  50 #define TARGET_VIRT_ADDR_SPACE_BITS 32
  51 #endif
  52 #define TARGET_PAGE_BITS 12
  53
  54 enum {
  55     /* Additional instructions */
  56     XTENSA_OPTION_CODE_DENSITY,
  57     XTENSA_OPTION_LOOP,
  58     XTENSA_OPTION_EXTENDED_L32R,
  59     XTENSA_OPTION_16_BIT_IMUL,
  60     XTENSA_OPTION_32_BIT_IMUL,
  61     XTENSA_OPTION_32_BIT_IMUL_HIGH,
  62     XTENSA_OPTION_32_BIT_IDIV,
  63     XTENSA_OPTION_MAC16,
  64     XTENSA_OPTION_MISC_OP_NSA,
  65     XTENSA_OPTION_MISC_OP_MINMAX,
  66     XTENSA_OPTION_MISC_OP_SEXT,
  67     XTENSA_OPTION_MISC_OP_CLAMPS,
  68     XTENSA_OPTION_COPROCESSOR,
  69     XTENSA_OPTION_BOOLEAN,
  70     XTENSA_OPTION_FP_COPROCESSOR,
  71     XTENSA_OPTION_MP_SYNCHRO,
  72     XTENSA_OPTION_CONDITIONAL_STORE,
  73     XTENSA_OPTION_ATOMCTL,
  74     XTENSA_OPTION_DEPBITS,
  75
  76     /* Interrupts and exceptions */
  77     XTENSA_OPTION_EXCEPTION,
  78     XTENSA_OPTION_RELOCATABLE_VECTOR,
  79     XTENSA_OPTION_UNALIGNED_EXCEPTION,
  80     XTENSA_OPTION_INTERRUPT,
  81     XTENSA_OPTION_HIGH_PRIORITY_INTERRUPT,
  82     XTENSA_OPTION_TIMER_INTERRUPT,
  83
  84     /* Local memory */
  85     XTENSA_OPTION_ICACHE,
  86     XTENSA_OPTION_ICACHE_TEST,
  87     XTENSA_OPTION_ICACHE_INDEX_LOCK,
  88     XTENSA_OPTION_DCACHE,
  89     XTENSA_OPTION_DCACHE_TEST,
  90     XTENSA_OPTION_DCACHE_INDEX_LOCK,
  91     XTENSA_OPTION_IRAM,
  92     XTENSA_OPTION_IROM,
  93     XTENSA_OPTION_DRAM,
  94     XTENSA_OPTION_DROM,
  95     XTENSA_OPTION_XLMI,
  96     XTENSA_OPTION_HW_ALIGNMENT,
  97     XTENSA_OPTION_MEMORY_ECC_PARITY,
  98
  99     /* Memory protection and translation */
 100     XTENSA_OPTION_REGION_PROTECTION,
 101     XTENSA_OPTION_REGION_TRANSLATION,
 102     XTENSA_OPTION_MMU,
 103     XTENSA_OPTION_CACHEATTR,
 104
 105     /* Other */
 106     XTENSA_OPTION_WINDOWED_REGISTER,
 107     XTENSA_OPTION_PROCESSOR_INTERFACE,
 108     XTENSA_OPTION_MISC_SR,
 109     XTENSA_OPTION_THREAD_POINTER,
 110     XTENSA_OPTION_PROCESSOR_ID,
 111     XTENSA_OPTION_DEBUG,
 112     XTENSA_OPTION_TRACE_PORT,
 113     XTENSA_OPTION_EXTERN_REGS,
 114 };
 115
 116 enum {
 117     EXPSTATE = 230,
 118     THREADPTR = 231,
 119     FCR = 232,
 120     FSR = 233,
 121 };
 122
 123 enum {
 124     LBEG = 0,
 125     LEND = 1,
 126     LCOUNT = 2,
 127     SAR = 3,
 128     BR = 4,
 129     LITBASE = 5,
 130     SCOMPARE1 = 12,
 131     ACCLO = 16,
 132     ACCHI = 17,
 133     MR = 32,
 134     WINDOW_BASE = 72,
 135     WINDOW_START = 73,
 136     PTEVADDR = 83,
 137     MMID = 89,
 138     RASID = 90,
 139     ITLBCFG = 91,
 140     DTLBCFG = 92,
 141     IBREAKENABLE = 96,
 142     MEMCTL = 97,
 143     CACHEATTR = 98,
 144     ATOMCTL = 99,
 145     DDR = 104,
 146     IBREAKA = 128,
 147     DBREAKA = 144,
 148     DBREAKC = 160,
 149     CONFIGID0 = 176,
 150     EPC1 = 177,
 151     DEPC = 192,
 152     EPS2 = 194,
 153     CONFIGID1 = 208,
 154     EXCSAVE1 = 209,
 155     CPENABLE = 224,
 156     INTSET = 226,
 157     INTCLEAR = 227,
 158     INTENABLE = 228,
 159     PS = 230,
 160     VECBASE = 231,
 161     EXCCAUSE = 232,
 162     DEBUGCAUSE = 233,
 163     CCOUNT = 234,
 164     PRID = 235,
 165     ICOUNT = 236,
 166     ICOUNTLEVEL = 237,
 167     EXCVADDR = 238,
 168     CCOMPARE = 240,
 169     MISC = 244,
 170 };
 171
 172 #define PS_INTLEVEL 0xf
 173 #define PS_INTLEVEL_SHIFT 0
 174
 175 #define PS_EXCM 0x10
 176 #define PS_UM 0x20
 177
 178 #define PS_RING 0xc0
 179 #define PS_RING_SHIFT 6
 180
 181 #define PS_OWB 0xf00
 182 #define PS_OWB_SHIFT 8
 183 #define PS_OWB_LEN 4
 184
 185 #define PS_CALLINC 0x30000
 186 #define PS_CALLINC_SHIFT 16
 187 #define PS_CALLINC_LEN 2
 188
 189 #define PS_WOE 0x40000
 190
 191 #define DEBUGCAUSE_IC 0x1
 192 #define DEBUGCAUSE_IB 0x2
 193 #define DEBUGCAUSE_DB 0x4
 194 #define DEBUGCAUSE_BI 0x8
 195 #define DEBUGCAUSE_BN 0x10
 196 #define DEBUGCAUSE_DI 0x20
 197 #define DEBUGCAUSE_DBNUM 0xf00
 198 #define DEBUGCAUSE_DBNUM_SHIFT 8
 199
 200 #define DBREAKC_SB 0x80000000
 201 #define DBREAKC_LB 0x40000000
 202 #define DBREAKC_SB_LB (DBREAKC_SB | DBREAKC_LB)
 203 #define DBREAKC_MASK 0x3f
 204
 205 #define MEMCTL_INIT 0x00800000
 206 #define MEMCTL_IUSEWAYS_SHIFT 18
 207 #define MEMCTL_IUSEWAYS_LEN 5
 208 #define MEMCTL_IUSEWAYS_MASK 0x007c0000
 209 #define MEMCTL_DALLOCWAYS_SHIFT 13
 210 #define MEMCTL_DALLOCWAYS_LEN 5
 211 #define MEMCTL_DALLOCWAYS_MASK 0x0003e000
 212 #define MEMCTL_DUSEWAYS_SHIFT 8
 213 #define MEMCTL_DUSEWAYS_LEN 5
 214 #define MEMCTL_DUSEWAYS_MASK 0x00001f00
 215 #define MEMCTL_ISNP 0x4
 216 #define MEMCTL_DSNP 0x2
 217 #define MEMCTL_IL0EN 0x1
 218
 219 #define MAX_INSN_LENGTH 64
 220 #define MAX_INSN_SLOTS 32
 221 #define MAX_OPCODE_ARGS 16
 222 #define MAX_NAREG 64
 223 #define MAX_NINTERRUPT 32
 224 #define MAX_NLEVEL 6
 225 #define MAX_NNMI 1
 226 #define MAX_NCCOMPARE 3
 227 #define MAX_TLB_WAY_SIZE 8
 228 #define MAX_NDBREAK 2
 229 #define MAX_NMEMORY 4
 230
 231 #define REGION_PAGE_MASK 0xe0000000
 232
 233 #define PAGE_CACHE_MASK    0x700
 234 #define PAGE_CACHE_SHIFT   8
 235 #define PAGE_CACHE_INVALID 0x000
 236 #define PAGE_CACHE_BYPASS  0x100
 237 #define PAGE_CACHE_WT      0x200
 238 #define PAGE_CACHE_WB      0x400
 239 #define PAGE_CACHE_ISOLATE 0x600
 240
 241 enum {
 242     /* Static vectors */
 243     EXC_RESET0,
 244     EXC_RESET1,
 245     EXC_MEMORY_ERROR,
 246
 247     /* Dynamic vectors */
 248     EXC_WINDOW_OVERFLOW4,
 249     EXC_WINDOW_UNDERFLOW4,
 250     EXC_WINDOW_OVERFLOW8,
 251     EXC_WINDOW_UNDERFLOW8,
 252     EXC_WINDOW_OVERFLOW12,
 253     EXC_WINDOW_UNDERFLOW12,
 254     EXC_IRQ,
 255     EXC_KERNEL,
 256     EXC_USER,
 257     EXC_DOUBLE,
 258     EXC_DEBUG,
 259     EXC_MAX
 260 };
 261
 262 enum {
 263     ILLEGAL_INSTRUCTION_CAUSE = 0,
 264     SYSCALL_CAUSE,
 265     INSTRUCTION_FETCH_ERROR_CAUSE,
 266     LOAD_STORE_ERROR_CAUSE,
 267     LEVEL1_INTERRUPT_CAUSE,
 268     ALLOCA_CAUSE,
 269     INTEGER_DIVIDE_BY_ZERO_CAUSE,
 270     PRIVILEGED_CAUSE = 8,
 271     LOAD_STORE_ALIGNMENT_CAUSE,
 272
 273     INSTR_PIF_DATA_ERROR_CAUSE = 12,
 274     LOAD_STORE_PIF_DATA_ERROR_CAUSE,
 275     INSTR_PIF_ADDR_ERROR_CAUSE,
 276     LOAD_STORE_PIF_ADDR_ERROR_CAUSE,
 277
 278     INST_TLB_MISS_CAUSE,
 279     INST_TLB_MULTI_HIT_CAUSE,
 280     INST_FETCH_PRIVILEGE_CAUSE,
 281     INST_FETCH_PROHIBITED_CAUSE = 20,
 282     LOAD_STORE_TLB_MISS_CAUSE = 24,
 283     LOAD_STORE_TLB_MULTI_HIT_CAUSE,
 284     LOAD_STORE_PRIVILEGE_CAUSE,
 285     LOAD_PROHIBITED_CAUSE = 28,
 286     STORE_PROHIBITED_CAUSE,
 287
 288     COPROCESSOR0_DISABLED = 32,
 289 };
 290
 291 typedef enum {
 292     INTTYPE_LEVEL,
 293     INTTYPE_EDGE,
 294     INTTYPE_NMI,
 295     INTTYPE_SOFTWARE,
 296     INTTYPE_TIMER,
 297     INTTYPE_DEBUG,
 298     INTTYPE_WRITE_ERR,
 299     INTTYPE_PROFILING,
 300     INTTYPE_MAX
 301 } interrupt_type;
 302
 303 struct CPUXtensaState;
 304
 305 typedef struct xtensa_tlb_entry {
 306     uint32_t vaddr;
 307     uint32_t paddr;
 308     uint8_t asid;
 309     uint8_t attr;
 310     bool variable;
 311 } xtensa_tlb_entry;
 312
 313 typedef struct xtensa_tlb {
 314     unsigned nways;
 315     const unsigned way_size[10];
 316     bool varway56;
 317     unsigned nrefillentries;
 318 } xtensa_tlb;
 319
 320 typedef struct XtensaGdbReg {
 321     int targno;
 322     unsigned flags;
 323     int type;
 324     int group;
 325     unsigned size;
 326 } XtensaGdbReg;
 327
 328 typedef struct XtensaGdbRegmap {
 329     int num_regs;
 330     int num_core_regs;
 331     /* PC + a + ar + sr + ur */
 332     XtensaGdbReg reg[1 + 16 + 64 + 256 + 256];
 333 } XtensaGdbRegmap;
 334
 335 typedef struct XtensaCcompareTimer {
 336     struct CPUXtensaState *env;
 337     QEMUTimer *timer;
 338 } XtensaCcompareTimer;
 339
 340 typedef struct XtensaMemory {
 341     unsigned num;
 342     struct XtensaMemoryRegion {
 343         uint32_t addr;
 344         uint32_t size;
 345     } location[MAX_NMEMORY];
 346 } XtensaMemory;
 347
 348 typedef struct DisasContext DisasContext;
 349 typedef void (*XtensaOpcodeOp)(DisasContext *dc, const uint32_t arg[],
 350                                const uint32_t par[]);
 351 typedef bool (*XtensaOpcodeBoolTest)(DisasContext *dc,
 352                                      const uint32_t arg[],
 353                                      const uint32_t par[]);
 354 typedef uint32_t (*XtensaOpcodeUintTest)(DisasContext *dc,
 355                                          const uint32_t arg[],
 356                                          const uint32_t par[]);
 357
 358 enum {
 359     XTENSA_OP_ILL = 0x1,
 360     XTENSA_OP_PRIVILEGED = 0x2,
 361     XTENSA_OP_SYSCALL = 0x4,
 362     XTENSA_OP_DEBUG_BREAK = 0x8,
 363
 364     XTENSA_OP_OVERFLOW = 0x10,
 365     XTENSA_OP_UNDERFLOW = 0x20,
 366     XTENSA_OP_ALLOCA = 0x40,
 367     XTENSA_OP_COPROCESSOR = 0x80,
 368
 369     XTENSA_OP_DIVIDE_BY_ZERO = 0x100,
 370
 371     XTENSA_OP_CHECK_INTERRUPTS = 0x200,
 372     XTENSA_OP_EXIT_TB_M1 = 0x400,
 373     XTENSA_OP_EXIT_TB_0 = 0x800,
 374 };
 375
 376 typedef struct XtensaOpcodeOps {
 377     const char *name;
 378     XtensaOpcodeOp translate;
 379     XtensaOpcodeBoolTest test_ill;
 380     XtensaOpcodeUintTest test_overflow;
 381     const uint32_t *par;
 382     uint32_t op_flags;
 383     uint32_t windowed_register_op;
 384     uint32_t coprocessor;
 385 } XtensaOpcodeOps;
 386
 387 typedef struct XtensaOpcodeTranslators {
 388     unsigned num_opcodes;
 389     const XtensaOpcodeOps *opcode;
 390 } XtensaOpcodeTranslators;
 391
 392 extern const XtensaOpcodeTranslators xtensa_core_opcodes;
 393 extern const XtensaOpcodeTranslators xtensa_fpu2000_opcodes;
 394
 395 struct XtensaConfig {
 396     const char *name;
 397     uint64_t options;
 398     XtensaGdbRegmap gdb_regmap;
 399     unsigned nareg;
 400     int excm_level;
 401     int ndepc;
 402     unsigned inst_fetch_width;
 403     unsigned max_insn_size;
 404     uint32_t vecbase;
 405     uint32_t exception_vector[EXC_MAX];
 406     unsigned ninterrupt;
 407     unsigned nlevel;
 408     uint32_t interrupt_vector[MAX_NLEVEL + MAX_NNMI + 1];
 409     uint32_t level_mask[MAX_NLEVEL + MAX_NNMI + 1];
 410     uint32_t inttype_mask[INTTYPE_MAX];
 411     struct {
 412         uint32_t level;
 413         interrupt_type inttype;
 414     } interrupt[MAX_NINTERRUPT];
 415     unsigned nccompare;
 416     uint32_t timerint[MAX_NCCOMPARE];
 417     unsigned nextint;
 418     unsigned extint[MAX_NINTERRUPT];
 419
 420     unsigned debug_level;
 421     unsigned nibreak;
 422     unsigned ndbreak;
 423
 424     unsigned icache_ways;
 425     unsigned dcache_ways;
 426     uint32_t memctl_mask;
 427
 428     XtensaMemory instrom;
 429     XtensaMemory instram;
 430     XtensaMemory datarom;
 431     XtensaMemory dataram;
 432     XtensaMemory sysrom;
 433     XtensaMemory sysram;
 434
 435     uint32_t configid[2];
 436
 437     void *isa_internal;
 438     xtensa_isa isa;
 439     XtensaOpcodeOps **opcode_ops;
 440     const XtensaOpcodeTranslators **opcode_translators;
 441
 442     uint32_t clock_freq_khz;
 443
 444     xtensa_tlb itlb;
 445     xtensa_tlb dtlb;
 446 };
 447
 448 typedef struct XtensaConfigList {
 449     const XtensaConfig *config;
 450     struct XtensaConfigList *next;
 451 } XtensaConfigList;
 452
 453 #ifdef HOST_WORDS_BIGENDIAN
 454 enum {
 455     FP_F32_HIGH,
 456     FP_F32_LOW,
 457 };
 458 #else
 459 enum {
 460     FP_F32_LOW,
 461     FP_F32_HIGH,
 462 };
 463 #endif
 464
 465 typedef struct CPUXtensaState {
 466     const XtensaConfig *config;
 467     uint32_t regs[16];
 468     uint32_t pc;
 469     uint32_t sregs[256];
 470     uint32_t uregs[256];
 471     uint32_t phys_regs[MAX_NAREG];
 472     union {
 473         float32 f32[2];
 474         float64 f64;
 475     } fregs[16];
 476     float_status fp_status;
 477
 478 #ifndef CONFIG_USER_ONLY
 479     xtensa_tlb_entry itlb[7][MAX_TLB_WAY_SIZE];
 480     xtensa_tlb_entry dtlb[10][MAX_TLB_WAY_SIZE];
 481     unsigned autorefill_idx;
 482     bool runstall;
 483     AddressSpace *address_space_er;
 484     MemoryRegion *system_er;
 485     int pending_irq_level; /* level of last raised IRQ */
 486     void **irq_inputs;
 487     XtensaCcompareTimer ccompare[MAX_NCCOMPARE];
 488     uint64_t time_base;
 489     uint64_t ccount_time;
 490     uint32_t ccount_base;
 491 #endif
 492
 493     int exception_taken;
 494     int yield_needed;
 495     unsigned static_vectors;
 496
 497     /* Watchpoints for DBREAK registers */
 498     struct CPUWatchpoint *cpu_watchpoint[MAX_NDBREAK];
 499
 500     CPU_COMMON
 501 } CPUXtensaState;
 502
 503 /**
 504  * XtensaCPU:
 505  * @env: #CPUXtensaState
 506  *
 507  * An Xtensa CPU.
 508  */
 509 struct XtensaCPU {
 510     /*< private >*/
 511     CPUState parent_obj;
 512     /*< public >*/
 513
 514     CPUXtensaState env;
 515 };
 516
 517 static inline XtensaCPU *xtensa_env_get_cpu(const CPUXtensaState *env)
 518 {
 519     return container_of(env, XtensaCPU, env);
 520 }
 521
 522 #define ENV_GET_CPU(e) CPU(xtensa_env_get_cpu(e))
 523
 524 #define ENV_OFFSET offsetof(XtensaCPU, env)
 525
 526
 527 int xtensa_cpu_handle_mmu_fault(CPUState *cs, vaddr address, int rw, int size,
 528                                 int mmu_idx);
 529 void xtensa_cpu_do_interrupt(CPUState *cpu);
 530 bool xtensa_cpu_exec_interrupt(CPUState *cpu, int interrupt_request);
 531 void xtensa_cpu_do_transaction_failed(CPUState *cs, hwaddr physaddr, vaddr addr,
 532                                       unsigned size, MMUAccessType access_type,
 533                                       int mmu_idx, MemTxAttrs attrs,
 534                                       MemTxResult response, uintptr_t retaddr);
 535 void xtensa_cpu_dump_state(CPUState *cpu, FILE *f,
 536                            fprintf_function cpu_fprintf, int flags);
 537 hwaddr xtensa_cpu_get_phys_page_debug(CPUState *cpu, vaddr addr);
 538 void xtensa_count_regs(const XtensaConfig *config,
 539                        unsigned *n_regs, unsigned *n_core_regs);
 540 int xtensa_cpu_gdb_read_register(CPUState *cpu, uint8_t *buf, int reg);
 541 int xtensa_cpu_gdb_write_register(CPUState *cpu, uint8_t *buf, int reg);
 542 void xtensa_cpu_do_unaligned_access(CPUState *cpu, vaddr addr,
 543                                     MMUAccessType access_type,
 544                                     int mmu_idx, uintptr_t retaddr);
 545
 546 #define cpu_signal_handler cpu_xtensa_signal_handler
 547 #define cpu_list xtensa_cpu_list
 548
 549 #define XTENSA_CPU_TYPE_SUFFIX "-" TYPE_XTENSA_CPU
 550 #define XTENSA_CPU_TYPE_NAME(model) model XTENSA_CPU_TYPE_SUFFIX
 551 #define CPU_RESOLVING_TYPE TYPE_XTENSA_CPU
 552
 553 #ifdef TARGET_WORDS_BIGENDIAN
 554 #define XTENSA_DEFAULT_CPU_MODEL "fsf"
 555 #define XTENSA_DEFAULT_CPU_NOMMU_MODEL "fsf"
 556 #else
 557 #define XTENSA_DEFAULT_CPU_MODEL "dc232b"
 558 #define XTENSA_DEFAULT_CPU_NOMMU_MODEL "de212"
 559 #endif
 560 #define XTENSA_DEFAULT_CPU_TYPE \
 561     XTENSA_CPU_TYPE_NAME(XTENSA_DEFAULT_CPU_MODEL)
 562 #define XTENSA_DEFAULT_CPU_NOMMU_TYPE \
 563     XTENSA_CPU_TYPE_NAME(XTENSA_DEFAULT_CPU_NOMMU_MODEL)
 564
 565 void xtensa_translate_init(void);
 566 void xtensa_breakpoint_handler(CPUState *cs);
 567 void xtensa_finalize_config(XtensaConfig *config);
 568 void xtensa_register_core(XtensaConfigList *node);
 569 void xtensa_sim_open_console(Chardev *chr);
 570 void check_interrupts(CPUXtensaState *s);
 571 void xtensa_irq_init(CPUXtensaState *env);
 572 void *xtensa_get_extint(CPUXtensaState *env, unsigned extint);
 573 void xtensa_timer_irq(CPUXtensaState *env, uint32_t id, uint32_t active);
 574 int cpu_xtensa_signal_handler(int host_signum, void *pinfo, void *puc);
 575 void xtensa_cpu_list(FILE *f, fprintf_function cpu_fprintf);
 576 void xtensa_sync_window_from_phys(CPUXtensaState *env);
 577 void xtensa_sync_phys_from_window(CPUXtensaState *env);
 578 void xtensa_rotate_window(CPUXtensaState *env, uint32_t delta);
 579 void xtensa_restore_owb(CPUXtensaState *env);
 580 void debug_exception_env(CPUXtensaState *new_env, uint32_t cause);
 581
 582 static inline void xtensa_select_static_vectors(CPUXtensaState *env,
 583                                                 unsigned n)
 584 {
 585     assert(n < 2);
 586     env->static_vectors = n;
 587 }
 588 void xtensa_runstall(CPUXtensaState *env, bool runstall);
 589 XtensaOpcodeOps *xtensa_find_opcode_ops(const XtensaOpcodeTranslators *t,
 590                                         const char *opcode);
 591
 592 #define XTENSA_OPTION_BIT(opt) (((uint64_t)1) << (opt))
 593 #define XTENSA_OPTION_ALL (~(uint64_t)0)
 594
 595 static inline bool xtensa_option_bits_enabled(const XtensaConfig *config,
 596         uint64_t opt)
 597 {
 598     return (config->options & opt) != 0;
 599 }
 600
 601 static inline bool xtensa_option_enabled(const XtensaConfig *config, int opt)
 602 {
 603     return xtensa_option_bits_enabled(config, XTENSA_OPTION_BIT(opt));
 604 }
 605
 606 static inline int xtensa_get_cintlevel(const CPUXtensaState *env)
 607 {
 608     int level = (env->sregs[PS] & PS_INTLEVEL) >> PS_INTLEVEL_SHIFT;
 609     if ((env->sregs[PS] & PS_EXCM) && env->config->excm_level > level) {
 610         level = env->config->excm_level;
 611     }
 612     return level;
 613 }
 614
 615 static inline int xtensa_get_ring(const CPUXtensaState *env)
 616 {
 617     if (xtensa_option_enabled(env->config, XTENSA_OPTION_MMU)) {
 618         return (env->sregs[PS] & PS_RING) >> PS_RING_SHIFT;
 619     } else {
 620         return 0;
 621     }
 622 }
 623
 624 static inline int xtensa_get_cring(const CPUXtensaState *env)
 625 {
 626     if (xtensa_option_enabled(env->config, XTENSA_OPTION_MMU) &&
 627             (env->sregs[PS] & PS_EXCM) == 0) {
 628         return (env->sregs[PS] & PS_RING) >> PS_RING_SHIFT;
 629     } else {
 630         return 0;
 631     }
 632 }
 633
 634 #ifndef CONFIG_USER_ONLY
 635 uint32_t xtensa_tlb_get_addr_mask(const CPUXtensaState *env,
 636                                   bool dtlb, uint32_t way);
 637 void split_tlb_entry_spec_way(const CPUXtensaState *env, uint32_t v, bool dtlb,
 638         uint32_t *vpn, uint32_t wi, uint32_t *ei);
 639 int xtensa_tlb_lookup(const CPUXtensaState *env, uint32_t addr, bool dtlb,
 640         uint32_t *pwi, uint32_t *pei, uint8_t *pring);
 641 void xtensa_tlb_set_entry_mmu(const CPUXtensaState *env,
 642         xtensa_tlb_entry *entry, bool dtlb,
 643         unsigned wi, unsigned ei, uint32_t vpn, uint32_t pte);
 644 void xtensa_tlb_set_entry(CPUXtensaState *env, bool dtlb,
 645         unsigned wi, unsigned ei, uint32_t vpn, uint32_t pte);
 646 int xtensa_get_physical_addr(CPUXtensaState *env, bool update_tlb,
 647         uint32_t vaddr, int is_write, int mmu_idx,
 648         uint32_t *paddr, uint32_t *page_size, unsigned *access);
 649 void reset_mmu(CPUXtensaState *env);
 650 void dump_mmu(FILE *f, fprintf_function cpu_fprintf, CPUXtensaState *env);
 651
 652 static inline MemoryRegion *xtensa_get_er_region(CPUXtensaState *env)
 653 {
 654     return env->system_er;
 655 }
 656
 657 static inline xtensa_tlb_entry *xtensa_tlb_get_entry(CPUXtensaState *env,
 658         bool dtlb, unsigned wi, unsigned ei)
 659 {
 660     return dtlb ?
 661         env->dtlb[wi] + ei :
 662         env->itlb[wi] + ei;
 663 }
 664 #endif
 665
 666 static inline uint32_t xtensa_replicate_windowstart(CPUXtensaState *env)
 667 {
 668     return env->sregs[WINDOW_START] |
 669         (env->sregs[WINDOW_START] << env->config->nareg / 4);
 670 }
 671
 672 /* MMU modes definitions */
 673 #define MMU_MODE0_SUFFIX _ring0
 674 #define MMU_MODE1_SUFFIX _ring1
 675 #define MMU_MODE2_SUFFIX _ring2
 676 #define MMU_MODE3_SUFFIX _ring3
 677 #define MMU_USER_IDX 3
 678
 679 static inline int cpu_mmu_index(CPUXtensaState *env, bool ifetch)
 680 {
 681     return xtensa_get_cring(env);
 682 }
 683
 684 #define XTENSA_TBFLAG_RING_MASK 0x3
 685 #define XTENSA_TBFLAG_EXCM 0x4
 686 #define XTENSA_TBFLAG_LITBASE 0x8
 687 #define XTENSA_TBFLAG_DEBUG 0x10
 688 #define XTENSA_TBFLAG_ICOUNT 0x20
 689 #define XTENSA_TBFLAG_CPENABLE_MASK 0x3fc0
 690 #define XTENSA_TBFLAG_CPENABLE_SHIFT 6
 691 #define XTENSA_TBFLAG_EXCEPTION 0x4000
 692 #define XTENSA_TBFLAG_WINDOW_MASK 0x18000
 693 #define XTENSA_TBFLAG_WINDOW_SHIFT 15
 694 #define XTENSA_TBFLAG_YIELD 0x20000
 695 #define XTENSA_TBFLAG_CWOE 0x40000
 696 #define XTENSA_TBFLAG_CALLINC_MASK 0x180000
 697 #define XTENSA_TBFLAG_CALLINC_SHIFT 19
 698
 699 #define XTENSA_CSBASE_LEND_MASK 0x0000ffff
 700 #define XTENSA_CSBASE_LEND_SHIFT 0
 701 #define XTENSA_CSBASE_LBEG_OFF_MASK 0x00ff0000
 702 #define XTENSA_CSBASE_LBEG_OFF_SHIFT 16
 703
 704 static inline void cpu_get_tb_cpu_state(CPUXtensaState *env, target_ulong *pc,
 705         target_ulong *cs_base, uint32_t *flags)
 706 {
 707     CPUState *cs = CPU(xtensa_env_get_cpu(env));
 708
 709     *pc = env->pc;
 710     *cs_base = 0;
 711     *flags = 0;
 712     *flags |= xtensa_get_ring(env);
 713     if (env->sregs[PS] & PS_EXCM) {
 714         *flags |= XTENSA_TBFLAG_EXCM;
 715     } else if (xtensa_option_enabled(env->config, XTENSA_OPTION_LOOP)) {
 716         target_ulong lend_dist =
 717             env->sregs[LEND] - (env->pc & -(1u << TARGET_PAGE_BITS));
 718
 719         /*
 720          * 0 in the csbase_lend field means that there may not be a loopback
 721          * for any instruction that starts inside this page. Any other value
 722          * means that an instruction that ends at this offset from the page
 723          * start may loop back and will need loopback code to be generated.
 724          *
 725          * lend_dist is 0 when LEND points to the start of the page, but
 726          * no instruction that starts inside this page may end at offset 0,
 727          * so it's still correct.
 728          *
 729          * When an instruction ends at a page boundary it may only start in
 730          * the previous page. lend_dist will be encoded as TARGET_PAGE_SIZE
 731          * for the TB that contains this instruction.
 732          */
 733         if (lend_dist < (1u << TARGET_PAGE_BITS) + env->config->max_insn_size) {
 734             target_ulong lbeg_off = env->sregs[LEND] - env->sregs[LBEG];
 735
 736             *cs_base = lend_dist;
 737             if (lbeg_off < 256) {
 738                 *cs_base |= lbeg_off << XTENSA_CSBASE_LBEG_OFF_SHIFT;
 739             }
 740         }
 741     }
 742     if (xtensa_option_enabled(env->config, XTENSA_OPTION_EXTENDED_L32R) &&
 743             (env->sregs[LITBASE] & 1)) {
 744         *flags |= XTENSA_TBFLAG_LITBASE;
 745     }
 746     if (xtensa_option_enabled(env->config, XTENSA_OPTION_DEBUG)) {
 747         if (xtensa_get_cintlevel(env) < env->config->debug_level) {
 748             *flags |= XTENSA_TBFLAG_DEBUG;
 749         }
 750         if (xtensa_get_cintlevel(env) < env->sregs[ICOUNTLEVEL]) {
 751             *flags |= XTENSA_TBFLAG_ICOUNT;
 752         }
 753     }
 754     if (xtensa_option_enabled(env->config, XTENSA_OPTION_COPROCESSOR)) {
 755         *flags |= env->sregs[CPENABLE] << XTENSA_TBFLAG_CPENABLE_SHIFT;
 756     }
 757     if (cs->singlestep_enabled && env->exception_taken) {
 758         *flags |= XTENSA_TBFLAG_EXCEPTION;
 759     }
 760     if (xtensa_option_enabled(env->config, XTENSA_OPTION_WINDOWED_REGISTER) &&
 761         (env->sregs[PS] & (PS_WOE | PS_EXCM)) == PS_WOE) {
 762         uint32_t windowstart = xtensa_replicate_windowstart(env) >>
 763             (env->sregs[WINDOW_BASE] + 1);
 764         uint32_t w = ctz32(windowstart | 0x8);
 765
 766         *flags |= (w << XTENSA_TBFLAG_WINDOW_SHIFT) | XTENSA_TBFLAG_CWOE;
 767         *flags |= extract32(env->sregs[PS], PS_CALLINC_SHIFT,
 768                             PS_CALLINC_LEN) << XTENSA_TBFLAG_CALLINC_SHIFT;
 769     } else {
 770         *flags |= 3 << XTENSA_TBFLAG_WINDOW_SHIFT;
 771     }
 772     if (env->yield_needed) {
 773         *flags |= XTENSA_TBFLAG_YIELD;
 774     }
 775 }
 776
 777 #include "exec/cpu-all.h"
 778
 779 #endif