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 #include "cpu-qom.h"
  32 #include "qemu/cpu-float.h"
  33 #include "exec/cpu-defs.h"
  34 #include "hw/clock.h"
  35 #include "xtensa-isa.h"
  36
  37 /* Xtensa processors have a weak memory model */
  38 #define TCG_GUEST_DEFAULT_MO      (0)
  39
  40 enum {
  41     /* Additional instructions */
  42     XTENSA_OPTION_CODE_DENSITY,
  43     XTENSA_OPTION_LOOP,
  44     XTENSA_OPTION_EXTENDED_L32R,
  45     XTENSA_OPTION_16_BIT_IMUL,
  46     XTENSA_OPTION_32_BIT_IMUL,
  47     XTENSA_OPTION_32_BIT_IMUL_HIGH,
  48     XTENSA_OPTION_32_BIT_IDIV,
  49     XTENSA_OPTION_MAC16,
  50     XTENSA_OPTION_MISC_OP_NSA,
  51     XTENSA_OPTION_MISC_OP_MINMAX,
  52     XTENSA_OPTION_MISC_OP_SEXT,
  53     XTENSA_OPTION_MISC_OP_CLAMPS,
  54     XTENSA_OPTION_COPROCESSOR,
  55     XTENSA_OPTION_BOOLEAN,
  56     XTENSA_OPTION_FP_COPROCESSOR,
  57     XTENSA_OPTION_DFP_COPROCESSOR,
  58     XTENSA_OPTION_DFPU_SINGLE_ONLY,
  59     XTENSA_OPTION_MP_SYNCHRO,
  60     XTENSA_OPTION_CONDITIONAL_STORE,
  61     XTENSA_OPTION_ATOMCTL,
  62     XTENSA_OPTION_DEPBITS,
  63
  64     /* Interrupts and exceptions */
  65     XTENSA_OPTION_EXCEPTION,
  66     XTENSA_OPTION_RELOCATABLE_VECTOR,
  67     XTENSA_OPTION_UNALIGNED_EXCEPTION,
  68     XTENSA_OPTION_INTERRUPT,
  69     XTENSA_OPTION_HIGH_PRIORITY_INTERRUPT,
  70     XTENSA_OPTION_TIMER_INTERRUPT,
  71
  72     /* Local memory */
  73     XTENSA_OPTION_ICACHE,
  74     XTENSA_OPTION_ICACHE_TEST,
  75     XTENSA_OPTION_ICACHE_INDEX_LOCK,
  76     XTENSA_OPTION_DCACHE,
  77     XTENSA_OPTION_DCACHE_TEST,
  78     XTENSA_OPTION_DCACHE_INDEX_LOCK,
  79     XTENSA_OPTION_IRAM,
  80     XTENSA_OPTION_IROM,
  81     XTENSA_OPTION_DRAM,
  82     XTENSA_OPTION_DROM,
  83     XTENSA_OPTION_XLMI,
  84     XTENSA_OPTION_HW_ALIGNMENT,
  85     XTENSA_OPTION_MEMORY_ECC_PARITY,
  86
  87     /* Memory protection and translation */
  88     XTENSA_OPTION_REGION_PROTECTION,
  89     XTENSA_OPTION_REGION_TRANSLATION,
  90     XTENSA_OPTION_MPU,
  91     XTENSA_OPTION_MMU,
  92     XTENSA_OPTION_CACHEATTR,
  93
  94     /* Other */
  95     XTENSA_OPTION_WINDOWED_REGISTER,
  96     XTENSA_OPTION_PROCESSOR_INTERFACE,
  97     XTENSA_OPTION_MISC_SR,
  98     XTENSA_OPTION_THREAD_POINTER,
  99     XTENSA_OPTION_PROCESSOR_ID,
 100     XTENSA_OPTION_DEBUG,
 101     XTENSA_OPTION_TRACE_PORT,
 102     XTENSA_OPTION_EXTERN_REGS,
 103 };
 104
 105 enum {
 106     EXPSTATE = 230,
 107     THREADPTR = 231,
 108     FCR = 232,
 109     FSR = 233,
 110 };
 111
 112 enum {
 113     LBEG = 0,
 114     LEND = 1,
 115     LCOUNT = 2,
 116     SAR = 3,
 117     BR = 4,
 118     LITBASE = 5,
 119     SCOMPARE1 = 12,
 120     ACCLO = 16,
 121     ACCHI = 17,
 122     MR = 32,
 123     PREFCTL = 40,
 124     WINDOW_BASE = 72,
 125     WINDOW_START = 73,
 126     PTEVADDR = 83,
 127     MMID = 89,
 128     RASID = 90,
 129     MPUENB = 90,
 130     ITLBCFG = 91,
 131     DTLBCFG = 92,
 132     MPUCFG = 92,
 133     ERACCESS = 95,
 134     IBREAKENABLE = 96,
 135     MEMCTL = 97,
 136     CACHEATTR = 98,
 137     CACHEADRDIS = 98,
 138     ATOMCTL = 99,
 139     DDR = 104,
 140     MEPC = 106,
 141     MEPS = 107,
 142     MESAVE = 108,
 143     MESR = 109,
 144     MECR = 110,
 145     MEVADDR = 111,
 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_INSNBUF_LENGTH \
 221     ((MAX_INSN_LENGTH + sizeof(xtensa_insnbuf_word) - 1) / \
 222      sizeof(xtensa_insnbuf_word))
 223 #define MAX_INSN_SLOTS 32
 224 #define MAX_OPCODE_ARGS 16
 225 #define MAX_NAREG 64
 226 #define MAX_NINTERRUPT 32
 227 #define MAX_NLEVEL 6
 228 #define MAX_NNMI 1
 229 #define MAX_NCCOMPARE 3
 230 #define MAX_TLB_WAY_SIZE 8
 231 #define MAX_NDBREAK 2
 232 #define MAX_NMEMORY 4
 233 #define MAX_MPU_FOREGROUND_SEGMENTS 32
 234
 235 #define REGION_PAGE_MASK 0xe0000000
 236
 237 #define PAGE_CACHE_MASK    0x700
 238 #define PAGE_CACHE_SHIFT   8
 239 #define PAGE_CACHE_INVALID 0x000
 240 #define PAGE_CACHE_BYPASS  0x100
 241 #define PAGE_CACHE_WT      0x200
 242 #define PAGE_CACHE_WB      0x400
 243 #define PAGE_CACHE_ISOLATE 0x600
 244
 245 enum {
 246     /* Static vectors */
 247     EXC_RESET0,
 248     EXC_RESET1,
 249     EXC_MEMORY_ERROR,
 250
 251     /* Dynamic vectors */
 252     EXC_WINDOW_OVERFLOW4,
 253     EXC_WINDOW_UNDERFLOW4,
 254     EXC_WINDOW_OVERFLOW8,
 255     EXC_WINDOW_UNDERFLOW8,
 256     EXC_WINDOW_OVERFLOW12,
 257     EXC_WINDOW_UNDERFLOW12,
 258     EXC_IRQ,
 259     EXC_KERNEL,
 260     EXC_USER,
 261     EXC_DOUBLE,
 262     EXC_DEBUG,
 263     EXC_MAX
 264 };
 265
 266 enum {
 267     ILLEGAL_INSTRUCTION_CAUSE = 0,
 268     SYSCALL_CAUSE,
 269     INSTRUCTION_FETCH_ERROR_CAUSE,
 270     LOAD_STORE_ERROR_CAUSE,
 271     LEVEL1_INTERRUPT_CAUSE,
 272     ALLOCA_CAUSE,
 273     INTEGER_DIVIDE_BY_ZERO_CAUSE,
 274     PC_VALUE_ERROR_CAUSE,
 275     PRIVILEGED_CAUSE,
 276     LOAD_STORE_ALIGNMENT_CAUSE,
 277     EXTERNAL_REG_PRIVILEGE_CAUSE,
 278     EXCLUSIVE_ERROR_CAUSE,
 279     INSTR_PIF_DATA_ERROR_CAUSE,
 280     LOAD_STORE_PIF_DATA_ERROR_CAUSE,
 281     INSTR_PIF_ADDR_ERROR_CAUSE,
 282     LOAD_STORE_PIF_ADDR_ERROR_CAUSE,
 283     INST_TLB_MISS_CAUSE,
 284     INST_TLB_MULTI_HIT_CAUSE,
 285     INST_FETCH_PRIVILEGE_CAUSE,
 286     INST_FETCH_PROHIBITED_CAUSE = 20,
 287     LOAD_STORE_TLB_MISS_CAUSE = 24,
 288     LOAD_STORE_TLB_MULTI_HIT_CAUSE,
 289     LOAD_STORE_PRIVILEGE_CAUSE,
 290     LOAD_PROHIBITED_CAUSE = 28,
 291     STORE_PROHIBITED_CAUSE,
 292
 293     COPROCESSOR0_DISABLED = 32,
 294 };
 295
 296 typedef enum {
 297     INTTYPE_LEVEL,
 298     INTTYPE_EDGE,
 299     INTTYPE_NMI,
 300     INTTYPE_SOFTWARE,
 301     INTTYPE_TIMER,
 302     INTTYPE_DEBUG,
 303     INTTYPE_WRITE_ERR,
 304     INTTYPE_PROFILING,
 305     INTTYPE_IDMA_DONE,
 306     INTTYPE_IDMA_ERR,
 307     INTTYPE_GS_ERR,
 308     INTTYPE_MAX
 309 } interrupt_type;
 310
 311 typedef struct CPUArchState CPUXtensaState;
 312
 313 typedef struct xtensa_tlb_entry {
 314     uint32_t vaddr;
 315     uint32_t paddr;
 316     uint8_t asid;
 317     uint8_t attr;
 318     bool variable;
 319 } xtensa_tlb_entry;
 320
 321 typedef struct xtensa_tlb {
 322     unsigned nways;
 323     const unsigned way_size[10];
 324     bool varway56;
 325     unsigned nrefillentries;
 326 } xtensa_tlb;
 327
 328 typedef struct xtensa_mpu_entry {
 329     uint32_t vaddr;
 330     uint32_t attr;
 331 } xtensa_mpu_entry;
 332
 333 typedef struct XtensaGdbReg {
 334     int targno;
 335     unsigned flags;
 336     int type;
 337     int group;
 338     unsigned size;
 339 } XtensaGdbReg;
 340
 341 typedef struct XtensaGdbRegmap {
 342     int num_regs;
 343     int num_core_regs;
 344     /* PC + a + ar + sr + ur */
 345     XtensaGdbReg reg[1 + 16 + 64 + 256 + 256];
 346 } XtensaGdbRegmap;
 347
 348 typedef struct XtensaCcompareTimer {
 349     CPUXtensaState *env;
 350     QEMUTimer *timer;
 351 } XtensaCcompareTimer;
 352
 353 typedef struct XtensaMemory {
 354     unsigned num;
 355     struct XtensaMemoryRegion {
 356         uint32_t addr;
 357         uint32_t size;
 358     } location[MAX_NMEMORY];
 359 } XtensaMemory;
 360
 361 typedef struct opcode_arg {
 362     uint32_t imm;
 363     uint32_t raw_imm;
 364     void *in;
 365     void *out;
 366     uint32_t num_bits;
 367 } OpcodeArg;
 368
 369 typedef struct DisasContext DisasContext;
 370 typedef void (*XtensaOpcodeOp)(DisasContext *dc, const OpcodeArg arg[],
 371                                const uint32_t par[]);
 372 typedef uint32_t (*XtensaOpcodeUintTest)(DisasContext *dc,
 373                                          const OpcodeArg arg[],
 374                                          const uint32_t par[]);
 375
 376 enum {
 377     XTENSA_OP_ILL = 0x1,
 378     XTENSA_OP_PRIVILEGED = 0x2,
 379     XTENSA_OP_SYSCALL = 0x4,
 380     XTENSA_OP_DEBUG_BREAK = 0x8,
 381
 382     XTENSA_OP_OVERFLOW = 0x10,
 383     XTENSA_OP_UNDERFLOW = 0x20,
 384     XTENSA_OP_ALLOCA = 0x40,
 385     XTENSA_OP_COPROCESSOR = 0x80,
 386
 387     XTENSA_OP_DIVIDE_BY_ZERO = 0x100,
 388
 389     /* Postprocessing flags */
 390     XTENSA_OP_CHECK_INTERRUPTS = 0x200,
 391     XTENSA_OP_EXIT_TB_M1 = 0x400,
 392     XTENSA_OP_EXIT_TB_0 = 0x800,
 393     XTENSA_OP_SYNC_REGISTER_WINDOW = 0x1000,
 394
 395     XTENSA_OP_POSTPROCESS =
 396         XTENSA_OP_CHECK_INTERRUPTS |
 397         XTENSA_OP_EXIT_TB_M1 |
 398         XTENSA_OP_EXIT_TB_0 |
 399         XTENSA_OP_SYNC_REGISTER_WINDOW,
 400
 401     XTENSA_OP_NAME_ARRAY = 0x8000,
 402
 403     XTENSA_OP_CONTROL_FLOW = 0x10000,
 404     XTENSA_OP_STORE = 0x20000,
 405     XTENSA_OP_LOAD = 0x40000,
 406     XTENSA_OP_LOAD_STORE =
 407         XTENSA_OP_LOAD | XTENSA_OP_STORE,
 408 };
 409
 410 typedef struct XtensaOpcodeOps {
 411     const void *name;
 412     XtensaOpcodeOp translate;
 413     XtensaOpcodeUintTest test_exceptions;
 414     XtensaOpcodeUintTest test_overflow;
 415     const uint32_t *par;
 416     uint32_t op_flags;
 417     uint32_t coprocessor;
 418 } XtensaOpcodeOps;
 419
 420 typedef struct XtensaOpcodeTranslators {
 421     unsigned num_opcodes;
 422     const XtensaOpcodeOps *opcode;
 423 } XtensaOpcodeTranslators;
 424
 425 extern const XtensaOpcodeTranslators xtensa_core_opcodes;
 426 extern const XtensaOpcodeTranslators xtensa_fpu2000_opcodes;
 427 extern const XtensaOpcodeTranslators xtensa_fpu_opcodes;
 428
 429 struct XtensaConfig {
 430     const char *name;
 431     uint64_t options;
 432     XtensaGdbRegmap gdb_regmap;
 433     unsigned nareg;
 434     int excm_level;
 435     int ndepc;
 436     unsigned inst_fetch_width;
 437     unsigned max_insn_size;
 438     uint32_t vecbase;
 439     uint32_t exception_vector[EXC_MAX];
 440     unsigned ninterrupt;
 441     unsigned nlevel;
 442     unsigned nmi_level;
 443     uint32_t interrupt_vector[MAX_NLEVEL + MAX_NNMI + 1];
 444     uint32_t level_mask[MAX_NLEVEL + MAX_NNMI + 1];
 445     uint32_t inttype_mask[INTTYPE_MAX];
 446     struct {
 447         uint32_t level;
 448         interrupt_type inttype;
 449     } interrupt[MAX_NINTERRUPT];
 450     unsigned nccompare;
 451     uint32_t timerint[MAX_NCCOMPARE];
 452     unsigned nextint;
 453     unsigned extint[MAX_NINTERRUPT];
 454
 455     unsigned debug_level;
 456     unsigned nibreak;
 457     unsigned ndbreak;
 458
 459     unsigned icache_ways;
 460     unsigned dcache_ways;
 461     unsigned dcache_line_bytes;
 462     uint32_t memctl_mask;
 463
 464     XtensaMemory instrom;
 465     XtensaMemory instram;
 466     XtensaMemory datarom;
 467     XtensaMemory dataram;
 468     XtensaMemory sysrom;
 469     XtensaMemory sysram;
 470
 471     unsigned hw_version;
 472     uint32_t configid[2];
 473
 474     void *isa_internal;
 475     xtensa_isa isa;
 476     XtensaOpcodeOps **opcode_ops;
 477     const XtensaOpcodeTranslators **opcode_translators;
 478     xtensa_regfile a_regfile;
 479     void ***regfile;
 480
 481     uint32_t clock_freq_khz;
 482
 483     xtensa_tlb itlb;
 484     xtensa_tlb dtlb;
 485
 486     uint32_t mpu_align;
 487     unsigned n_mpu_fg_segments;
 488     unsigned n_mpu_bg_segments;
 489     const xtensa_mpu_entry *mpu_bg;
 490
 491     bool use_first_nan;
 492 };
 493
 494 typedef struct XtensaConfigList {
 495     const XtensaConfig *config;
 496     struct XtensaConfigList *next;
 497 } XtensaConfigList;
 498
 499 #if HOST_BIG_ENDIAN
 500 enum {
 501     FP_F32_HIGH,
 502     FP_F32_LOW,
 503 };
 504 #else
 505 enum {
 506     FP_F32_LOW,
 507     FP_F32_HIGH,
 508 };
 509 #endif
 510
 511 struct CPUArchState {
 512     const XtensaConfig *config;
 513     uint32_t regs[16];
 514     uint32_t pc;
 515     uint32_t sregs[256];
 516     uint32_t uregs[256];
 517     uint32_t phys_regs[MAX_NAREG];
 518     union {
 519         float32 f32[2];
 520         float64 f64;
 521     } fregs[16];
 522     float_status fp_status;
 523     uint32_t windowbase_next;
 524     uint32_t exclusive_addr;
 525     uint32_t exclusive_val;
 526
 527 #ifndef CONFIG_USER_ONLY
 528     xtensa_tlb_entry itlb[7][MAX_TLB_WAY_SIZE];
 529     xtensa_tlb_entry dtlb[10][MAX_TLB_WAY_SIZE];
 530     xtensa_mpu_entry mpu_fg[MAX_MPU_FOREGROUND_SEGMENTS];
 531     unsigned autorefill_idx;
 532     bool runstall;
 533     AddressSpace *address_space_er;
 534     MemoryRegion *system_er;
 535     int pending_irq_level; /* level of last raised IRQ */
 536     qemu_irq *irq_inputs;
 537     qemu_irq ext_irq_inputs[MAX_NINTERRUPT];
 538     qemu_irq runstall_irq;
 539     XtensaCcompareTimer ccompare[MAX_NCCOMPARE];
 540     uint64_t time_base;
 541     uint64_t ccount_time;
 542     uint32_t ccount_base;
 543 #endif
 544
 545     int yield_needed;
 546     unsigned static_vectors;
 547
 548     /* Watchpoints for DBREAK registers */
 549     struct CPUWatchpoint *cpu_watchpoint[MAX_NDBREAK];
 550 };
 551
 552 /**
 553  * XtensaCPU:
 554  * @env: #CPUXtensaState
 555  *
 556  * An Xtensa CPU.
 557  */
 558 struct ArchCPU {
 559     /*< private >*/
 560     CPUState parent_obj;
 561     /*< public >*/
 562
 563     Clock *clock;
 564     CPUNegativeOffsetState neg;
 565     CPUXtensaState env;
 566 };
 567
 568
 569 #ifndef CONFIG_USER_ONLY
 570 bool xtensa_cpu_tlb_fill(CPUState *cs, vaddr address, int size,
 571                          MMUAccessType access_type, int mmu_idx,
 572                          bool probe, uintptr_t retaddr);
 573 void xtensa_cpu_do_interrupt(CPUState *cpu);
 574 bool xtensa_cpu_exec_interrupt(CPUState *cpu, int interrupt_request);
 575 void xtensa_cpu_do_transaction_failed(CPUState *cs, hwaddr physaddr, vaddr addr,
 576                                       unsigned size, MMUAccessType access_type,
 577                                       int mmu_idx, MemTxAttrs attrs,
 578                                       MemTxResult response, uintptr_t retaddr);
 579 #endif
 580 void xtensa_cpu_dump_state(CPUState *cpu, FILE *f, int flags);
 581 hwaddr xtensa_cpu_get_phys_page_debug(CPUState *cpu, vaddr addr);
 582 void xtensa_count_regs(const XtensaConfig *config,
 583                        unsigned *n_regs, unsigned *n_core_regs);
 584 int xtensa_cpu_gdb_read_register(CPUState *cpu, GByteArray *buf, int reg);
 585 int xtensa_cpu_gdb_write_register(CPUState *cpu, uint8_t *buf, int reg);
 586 G_NORETURN void xtensa_cpu_do_unaligned_access(CPUState *cpu, vaddr addr,
 587                                                MMUAccessType access_type, int mmu_idx,
 588                                                uintptr_t retaddr);
 589
 590 #define cpu_list xtensa_cpu_list
 591
 592 #define XTENSA_CPU_TYPE_SUFFIX "-" TYPE_XTENSA_CPU
 593 #define XTENSA_CPU_TYPE_NAME(model) model XTENSA_CPU_TYPE_SUFFIX
 594 #define CPU_RESOLVING_TYPE TYPE_XTENSA_CPU
 595
 596 #if TARGET_BIG_ENDIAN
 597 #define XTENSA_DEFAULT_CPU_MODEL "fsf"
 598 #define XTENSA_DEFAULT_CPU_NOMMU_MODEL "fsf"
 599 #else
 600 #define XTENSA_DEFAULT_CPU_MODEL "dc232b"
 601 #define XTENSA_DEFAULT_CPU_NOMMU_MODEL "de212"
 602 #endif
 603 #define XTENSA_DEFAULT_CPU_TYPE \
 604     XTENSA_CPU_TYPE_NAME(XTENSA_DEFAULT_CPU_MODEL)
 605 #define XTENSA_DEFAULT_CPU_NOMMU_TYPE \
 606     XTENSA_CPU_TYPE_NAME(XTENSA_DEFAULT_CPU_NOMMU_MODEL)
 607
 608 void xtensa_collect_sr_names(const XtensaConfig *config);
 609 void xtensa_translate_init(void);
 610 void **xtensa_get_regfile_by_name(const char *name, int entries, int bits);
 611 void xtensa_breakpoint_handler(CPUState *cs);
 612 void xtensa_register_core(XtensaConfigList *node);
 613 void xtensa_sim_open_console(Chardev *chr);
 614 void check_interrupts(CPUXtensaState *s);
 615 void xtensa_irq_init(CPUXtensaState *env);
 616 qemu_irq *xtensa_get_extints(CPUXtensaState *env);
 617 qemu_irq xtensa_get_runstall(CPUXtensaState *env);
 618 void xtensa_cpu_list(void);
 619 void xtensa_sync_window_from_phys(CPUXtensaState *env);
 620 void xtensa_sync_phys_from_window(CPUXtensaState *env);
 621 void xtensa_rotate_window(CPUXtensaState *env, uint32_t delta);
 622 void xtensa_restore_owb(CPUXtensaState *env);
 623 void debug_exception_env(CPUXtensaState *new_env, uint32_t cause);
 624
 625 static inline void xtensa_select_static_vectors(CPUXtensaState *env,
 626                                                 unsigned n)
 627 {
 628     assert(n < 2);
 629     env->static_vectors = n;
 630 }
 631 void xtensa_runstall(CPUXtensaState *env, bool runstall);
 632
 633 #define XTENSA_OPTION_BIT(opt) (((uint64_t)1) << (opt))
 634 #define XTENSA_OPTION_ALL (~(uint64_t)0)
 635
 636 static inline bool xtensa_option_bits_enabled(const XtensaConfig *config,
 637         uint64_t opt)
 638 {
 639     return (config->options & opt) != 0;
 640 }
 641
 642 static inline bool xtensa_option_enabled(const XtensaConfig *config, int opt)
 643 {
 644     return xtensa_option_bits_enabled(config, XTENSA_OPTION_BIT(opt));
 645 }
 646
 647 static inline int xtensa_get_cintlevel(const CPUXtensaState *env)
 648 {
 649     int level = (env->sregs[PS] & PS_INTLEVEL) >> PS_INTLEVEL_SHIFT;
 650     if ((env->sregs[PS] & PS_EXCM) && env->config->excm_level > level) {
 651         level = env->config->excm_level;
 652     }
 653     return level;
 654 }
 655
 656 static inline int xtensa_get_ring(const CPUXtensaState *env)
 657 {
 658     if (xtensa_option_bits_enabled(env->config,
 659                                    XTENSA_OPTION_BIT(XTENSA_OPTION_MMU) |
 660                                    XTENSA_OPTION_BIT(XTENSA_OPTION_MPU))) {
 661         return (env->sregs[PS] & PS_RING) >> PS_RING_SHIFT;
 662     } else {
 663         return 0;
 664     }
 665 }
 666
 667 static inline int xtensa_get_cring(const CPUXtensaState *env)
 668 {
 669     if (xtensa_option_bits_enabled(env->config,
 670                                    XTENSA_OPTION_BIT(XTENSA_OPTION_MMU) |
 671                                    XTENSA_OPTION_BIT(XTENSA_OPTION_MPU)) &&
 672         (env->sregs[PS] & PS_EXCM) == 0) {
 673         return (env->sregs[PS] & PS_RING) >> PS_RING_SHIFT;
 674     } else {
 675         return 0;
 676     }
 677 }
 678
 679 #ifndef CONFIG_USER_ONLY
 680 int xtensa_get_physical_addr(CPUXtensaState *env, bool update_tlb,
 681         uint32_t vaddr, int is_write, int mmu_idx,
 682         uint32_t *paddr, uint32_t *page_size, unsigned *access);
 683 void reset_mmu(CPUXtensaState *env);
 684 void dump_mmu(CPUXtensaState *env);
 685
 686 static inline MemoryRegion *xtensa_get_er_region(CPUXtensaState *env)
 687 {
 688     return env->system_er;
 689 }
 690 #else
 691 void xtensa_set_abi_call0(void);
 692 bool xtensa_abi_call0(void);
 693 #endif
 694
 695 static inline uint32_t xtensa_replicate_windowstart(CPUXtensaState *env)
 696 {
 697     return env->sregs[WINDOW_START] |
 698         (env->sregs[WINDOW_START] << env->config->nareg / 4);
 699 }
 700
 701 /* MMU modes definitions */
 702 #define MMU_USER_IDX 3
 703
 704 static inline int cpu_mmu_index(CPUXtensaState *env, bool ifetch)
 705 {
 706     return xtensa_get_cring(env);
 707 }
 708
 709 #define XTENSA_TBFLAG_RING_MASK 0x3
 710 #define XTENSA_TBFLAG_EXCM 0x4
 711 #define XTENSA_TBFLAG_LITBASE 0x8
 712 #define XTENSA_TBFLAG_DEBUG 0x10
 713 #define XTENSA_TBFLAG_ICOUNT 0x20
 714 #define XTENSA_TBFLAG_CPENABLE_MASK 0x3fc0
 715 #define XTENSA_TBFLAG_CPENABLE_SHIFT 6
 716 #define XTENSA_TBFLAG_WINDOW_MASK 0x18000
 717 #define XTENSA_TBFLAG_WINDOW_SHIFT 15
 718 #define XTENSA_TBFLAG_YIELD 0x20000
 719 #define XTENSA_TBFLAG_CWOE 0x40000
 720 #define XTENSA_TBFLAG_CALLINC_MASK 0x180000
 721 #define XTENSA_TBFLAG_CALLINC_SHIFT 19
 722
 723 #define XTENSA_CSBASE_LEND_MASK 0x0000ffff
 724 #define XTENSA_CSBASE_LEND_SHIFT 0
 725 #define XTENSA_CSBASE_LBEG_OFF_MASK 0x00ff0000
 726 #define XTENSA_CSBASE_LBEG_OFF_SHIFT 16
 727
 728 #include "exec/cpu-all.h"
 729
 730 static inline void cpu_get_tb_cpu_state(CPUXtensaState *env, target_ulong *pc,
 731         target_ulong *cs_base, uint32_t *flags)
 732 {
 733     *pc = env->pc;
 734     *cs_base = 0;
 735     *flags = 0;
 736     *flags |= xtensa_get_ring(env);
 737     if (env->sregs[PS] & PS_EXCM) {
 738         *flags |= XTENSA_TBFLAG_EXCM;
 739     } else if (xtensa_option_enabled(env->config, XTENSA_OPTION_LOOP)) {
 740         target_ulong lend_dist =
 741             env->sregs[LEND] - (env->pc & -(1u << TARGET_PAGE_BITS));
 742
 743         /*
 744          * 0 in the csbase_lend field means that there may not be a loopback
 745          * for any instruction that starts inside this page. Any other value
 746          * means that an instruction that ends at this offset from the page
 747          * start may loop back and will need loopback code to be generated.
 748          *
 749          * lend_dist is 0 when LEND points to the start of the page, but
 750          * no instruction that starts inside this page may end at offset 0,
 751          * so it's still correct.
 752          *
 753          * When an instruction ends at a page boundary it may only start in
 754          * the previous page. lend_dist will be encoded as TARGET_PAGE_SIZE
 755          * for the TB that contains this instruction.
 756          */
 757         if (lend_dist < (1u << TARGET_PAGE_BITS) + env->config->max_insn_size) {
 758             target_ulong lbeg_off = env->sregs[LEND] - env->sregs[LBEG];
 759
 760             *cs_base = lend_dist;
 761             if (lbeg_off < 256) {
 762                 *cs_base |= lbeg_off << XTENSA_CSBASE_LBEG_OFF_SHIFT;
 763             }
 764         }
 765     }
 766     if (xtensa_option_enabled(env->config, XTENSA_OPTION_EXTENDED_L32R) &&
 767             (env->sregs[LITBASE] & 1)) {
 768         *flags |= XTENSA_TBFLAG_LITBASE;
 769     }
 770     if (xtensa_option_enabled(env->config, XTENSA_OPTION_DEBUG)) {
 771         if (xtensa_get_cintlevel(env) < env->config->debug_level) {
 772             *flags |= XTENSA_TBFLAG_DEBUG;
 773         }
 774         if (xtensa_get_cintlevel(env) < env->sregs[ICOUNTLEVEL]) {
 775             *flags |= XTENSA_TBFLAG_ICOUNT;
 776         }
 777     }
 778     if (xtensa_option_enabled(env->config, XTENSA_OPTION_COPROCESSOR)) {
 779         *flags |= env->sregs[CPENABLE] << XTENSA_TBFLAG_CPENABLE_SHIFT;
 780     }
 781     if (xtensa_option_enabled(env->config, XTENSA_OPTION_WINDOWED_REGISTER) &&
 782         (env->sregs[PS] & (PS_WOE | PS_EXCM)) == PS_WOE) {
 783         uint32_t windowstart = xtensa_replicate_windowstart(env) >>
 784             (env->sregs[WINDOW_BASE] + 1);
 785         uint32_t w = ctz32(windowstart | 0x8);
 786
 787         *flags |= (w << XTENSA_TBFLAG_WINDOW_SHIFT) | XTENSA_TBFLAG_CWOE;
 788         *flags |= extract32(env->sregs[PS], PS_CALLINC_SHIFT,
 789                             PS_CALLINC_LEN) << XTENSA_TBFLAG_CALLINC_SHIFT;
 790     } else {
 791         *flags |= 3 << XTENSA_TBFLAG_WINDOW_SHIFT;
 792     }
 793     if (env->yield_needed) {
 794         *flags |= XTENSA_TBFLAG_YIELD;
 795     }
 796 }
 797
 798 XtensaCPU *xtensa_cpu_create_with_clock(const char *cpu_type,
 799                                         Clock *cpu_refclk);
 800
 801 #endif