qemu/target-mips/cpu.h

   1 #if !defined (__MIPS_CPU_H__)
   2 #define __MIPS_CPU_H__
   3
   4 #define TARGET_HAS_ICE 1
   5
   6 #define ELF_MACHINE     EM_MIPS
   7
   8 #include "config.h"
   9 #include "mips-defs.h"
  10 #include "cpu-defs.h"
  11 #include "softfloat.h"
  12
  13 // uint_fast8_t and uint_fast16_t not in <sys/int_types.h>
  14 // XXX: move that elsewhere
  15 #if defined(HOST_SOLARIS) && HOST_SOLARIS < 10
  16 typedef unsigned char           uint_fast8_t;
  17 typedef unsigned int            uint_fast16_t;
  18 #endif
  19
  20 struct CPUMIPSState;
  21
  22 typedef struct r4k_tlb_t r4k_tlb_t;
  23 struct r4k_tlb_t {
  24     target_ulong VPN;
  25     uint32_t PageMask;
  26     uint_fast8_t ASID;
  27     uint_fast16_t G:1;
  28     uint_fast16_t C0:3;
  29     uint_fast16_t C1:3;
  30     uint_fast16_t V0:1;
  31     uint_fast16_t V1:1;
  32     uint_fast16_t D0:1;
  33     uint_fast16_t D1:1;
  34     target_ulong PFN[2];
  35 };
  36
  37 typedef struct CPUMIPSTLBContext CPUMIPSTLBContext;
  38 struct CPUMIPSTLBContext {
  39     uint32_t nb_tlb;
  40     uint32_t tlb_in_use;
  41     int (*map_address) (struct CPUMIPSState *env, target_ulong *physical, int *prot, target_ulong address, int rw, int access_type);
  42     void (*do_tlbwi) (void);
  43     void (*do_tlbwr) (void);
  44     void (*do_tlbp) (void);
  45     void (*do_tlbr) (void);
  46     union {
  47         struct {
  48             r4k_tlb_t tlb[MIPS_TLB_MAX];
  49         } r4k;
  50     } mmu;
  51 };
  52
  53 typedef union fpr_t fpr_t;
  54 union fpr_t {
  55     float64  fd;   /* ieee double precision */
  56     float32  fs[2];/* ieee single precision */
  57     uint64_t d;    /* binary double fixed-point */
  58     uint32_t w[2]; /* binary single fixed-point */
  59 };
  60 /* define FP_ENDIAN_IDX to access the same location
  61  * in the fpr_t union regardless of the host endianess
  62  */
  63 #if defined(WORDS_BIGENDIAN)
  64 #  define FP_ENDIAN_IDX 1
  65 #else
  66 #  define FP_ENDIAN_IDX 0
  67 #endif
  68
  69 typedef struct CPUMIPSFPUContext CPUMIPSFPUContext;
  70 struct CPUMIPSFPUContext {
  71     /* Floating point registers */
  72     fpr_t fpr[32];
  73 #ifndef USE_HOST_FLOAT_REGS
  74     fpr_t ft0;
  75     fpr_t ft1;
  76     fpr_t ft2;
  77 #endif
  78     float_status fp_status;
  79     /* fpu implementation/revision register (fir) */
  80     uint32_t fcr0;
  81 #define FCR0_F64 22
  82 #define FCR0_L 21
  83 #define FCR0_W 20
  84 #define FCR0_3D 19
  85 #define FCR0_PS 18
  86 #define FCR0_D 17
  87 #define FCR0_S 16
  88 #define FCR0_PRID 8
  89 #define FCR0_REV 0
  90     /* fcsr */
  91     uint32_t fcr31;
  92 #define SET_FP_COND(num,env)     do { ((env)->fcr31) |= ((num) ? (1 << ((num) + 24)) : (1 << 23)); } while(0)
  93 #define CLEAR_FP_COND(num,env)   do { ((env)->fcr31) &= ~((num) ? (1 << ((num) + 24)) : (1 << 23)); } while(0)
  94 #define GET_FP_COND(env)         ((((env)->fcr31 >> 24) & 0xfe) | (((env)->fcr31 >> 23) & 0x1))
  95 #define GET_FP_CAUSE(reg)        (((reg) >> 12) & 0x3f)
  96 #define GET_FP_ENABLE(reg)       (((reg) >>  7) & 0x1f)
  97 #define GET_FP_FLAGS(reg)        (((reg) >>  2) & 0x1f)
  98 #define SET_FP_CAUSE(reg,v)      do { (reg) = ((reg) & ~(0x3f << 12)) | ((v & 0x3f) << 12); } while(0)
  99 #define SET_FP_ENABLE(reg,v)     do { (reg) = ((reg) & ~(0x1f <<  7)) | ((v & 0x1f) << 7); } while(0)
 100 #define SET_FP_FLAGS(reg,v)      do { (reg) = ((reg) & ~(0x1f <<  2)) | ((v & 0x1f) << 2); } while(0)
 101 #define UPDATE_FP_FLAGS(reg,v)   do { (reg) |= ((v & 0x1f) << 2); } while(0)
 102 #define FP_INEXACT        1
 103 #define FP_UNDERFLOW      2
 104 #define FP_OVERFLOW       4
 105 #define FP_DIV0           8
 106 #define FP_INVALID        16
 107 #define FP_UNIMPLEMENTED  32
 108 };
 109
 110 typedef struct CPUMIPSMVPContext CPUMIPSMVPContext;
 111 struct CPUMIPSMVPContext {
 112     int32_t CP0_MVPControl;
 113 #define CP0MVPCo_CPA    3
 114 #define CP0MVPCo_STLB   2
 115 #define CP0MVPCo_VPC    1
 116 #define CP0MVPCo_EVP    0
 117     int32_t CP0_MVPConf0;
 118 #define CP0MVPC0_M      31
 119 #define CP0MVPC0_TLBS   29
 120 #define CP0MVPC0_GS     28
 121 #define CP0MVPC0_PCP    27
 122 #define CP0MVPC0_PTLBE  16
 123 #define CP0MVPC0_TCA    15
 124 #define CP0MVPC0_PVPE   10
 125 #define CP0MVPC0_PTC    0
 126     int32_t CP0_MVPConf1;
 127 #define CP0MVPC1_CIM    31
 128 #define CP0MVPC1_CIF    30
 129 #define CP0MVPC1_PCX    20
 130 #define CP0MVPC1_PCP2   10
 131 #define CP0MVPC1_PCP1   0
 132 };
 133
 134 typedef struct mips_def_t mips_def_t;
 135
 136 #define MIPS_SHADOW_SET_MAX 16
 137 #define MIPS_TC_MAX 5
 138 #define MIPS_DSP_ACC 4
 139
 140 typedef struct CPUMIPSState CPUMIPSState;
 141 struct CPUMIPSState {
 142     /* General integer registers */
 143     target_ulong gpr[32][MIPS_SHADOW_SET_MAX];
 144     /* Special registers */
 145     target_ulong PC[MIPS_TC_MAX];
 146 #if TARGET_LONG_BITS > HOST_LONG_BITS
 147     target_ulong t0;
 148     target_ulong t1;
 149     target_ulong t2;
 150 #endif
 151     target_ulong HI[MIPS_DSP_ACC][MIPS_TC_MAX];
 152     target_ulong LO[MIPS_DSP_ACC][MIPS_TC_MAX];
 153     target_ulong ACX[MIPS_DSP_ACC][MIPS_TC_MAX];
 154     target_ulong DSPControl[MIPS_TC_MAX];
 155
 156     CPUMIPSMVPContext *mvp;
 157     CPUMIPSTLBContext *tlb;
 158     CPUMIPSFPUContext *fpu;
 159     uint32_t current_tc;
 160
 161     uint32_t SEGBITS;
 162     target_ulong SEGMask;
 163
 164     int32_t CP0_Index;
 165     /* CP0_MVP* are per MVP registers. */
 166     int32_t CP0_Random;
 167     int32_t CP0_VPEControl;
 168 #define CP0VPECo_YSI    21
 169 #define CP0VPECo_GSI    20
 170 #define CP0VPECo_EXCPT  16
 171 #define CP0VPECo_TE     15
 172 #define CP0VPECo_TargTC 0
 173     int32_t CP0_VPEConf0;
 174 #define CP0VPEC0_M      31
 175 #define CP0VPEC0_XTC    21
 176 #define CP0VPEC0_TCS    19
 177 #define CP0VPEC0_SCS    18
 178 #define CP0VPEC0_DSC    17
 179 #define CP0VPEC0_ICS    16
 180 #define CP0VPEC0_MVP    1
 181 #define CP0VPEC0_VPA    0
 182     int32_t CP0_VPEConf1;
 183 #define CP0VPEC1_NCX    20
 184 #define CP0VPEC1_NCP2   10
 185 #define CP0VPEC1_NCP1   0
 186     target_ulong CP0_YQMask;
 187     target_ulong CP0_VPESchedule;
 188     target_ulong CP0_VPEScheFBack;
 189     int32_t CP0_VPEOpt;
 190 #define CP0VPEOpt_IWX7  15
 191 #define CP0VPEOpt_IWX6  14
 192 #define CP0VPEOpt_IWX5  13
 193 #define CP0VPEOpt_IWX4  12
 194 #define CP0VPEOpt_IWX3  11
 195 #define CP0VPEOpt_IWX2  10
 196 #define CP0VPEOpt_IWX1  9
 197 #define CP0VPEOpt_IWX0  8
 198 #define CP0VPEOpt_DWX7  7
 199 #define CP0VPEOpt_DWX6  6
 200 #define CP0VPEOpt_DWX5  5
 201 #define CP0VPEOpt_DWX4  4
 202 #define CP0VPEOpt_DWX3  3
 203 #define CP0VPEOpt_DWX2  2
 204 #define CP0VPEOpt_DWX1  1
 205 #define CP0VPEOpt_DWX0  0
 206     target_ulong CP0_EntryLo0;
 207     int32_t CP0_TCStatus[MIPS_TC_MAX];
 208 #define CP0TCSt_TCU3    31
 209 #define CP0TCSt_TCU2    30
 210 #define CP0TCSt_TCU1    29
 211 #define CP0TCSt_TCU0    28
 212 #define CP0TCSt_TMX     27
 213 #define CP0TCSt_RNST    23
 214 #define CP0TCSt_TDS     21
 215 #define CP0TCSt_DT      20
 216 #define CP0TCSt_DA      15
 217 #define CP0TCSt_A       13
 218 #define CP0TCSt_TKSU    11
 219 #define CP0TCSt_IXMT    10
 220 #define CP0TCSt_TASID   0
 221     int32_t CP0_TCBind[MIPS_TC_MAX];
 222 #define CP0TCBd_CurTC   21
 223 #define CP0TCBd_TBE     17
 224 #define CP0TCBd_CurVPE  0
 225     target_ulong CP0_TCHalt[MIPS_TC_MAX];
 226     target_ulong CP0_TCContext[MIPS_TC_MAX];
 227     target_ulong CP0_TCSchedule[MIPS_TC_MAX];
 228     target_ulong CP0_TCScheFBack[MIPS_TC_MAX];
 229     target_ulong CP0_EntryLo1;
 230     target_ulong CP0_Context;
 231     int32_t CP0_PageMask;
 232     int32_t CP0_PageGrain;
 233     int32_t CP0_Wired;
 234     int32_t CP0_SRSConf0_rw_bitmask;
 235     int32_t CP0_SRSConf0;
 236 #define CP0SRSC0_M      31
 237 #define CP0SRSC0_SRS3   20
 238 #define CP0SRSC0_SRS2   10
 239 #define CP0SRSC0_SRS1   0
 240     int32_t CP0_SRSConf1_rw_bitmask;
 241     int32_t CP0_SRSConf1;
 242 #define CP0SRSC1_M      31
 243 #define CP0SRSC1_SRS6   20
 244 #define CP0SRSC1_SRS5   10
 245 #define CP0SRSC1_SRS4   0
 246     int32_t CP0_SRSConf2_rw_bitmask;
 247     int32_t CP0_SRSConf2;
 248 #define CP0SRSC2_M      31
 249 #define CP0SRSC2_SRS9   20
 250 #define CP0SRSC2_SRS8   10
 251 #define CP0SRSC2_SRS7   0
 252     int32_t CP0_SRSConf3_rw_bitmask;
 253     int32_t CP0_SRSConf3;
 254 #define CP0SRSC3_M      31
 255 #define CP0SRSC3_SRS12  20
 256 #define CP0SRSC3_SRS11  10
 257 #define CP0SRSC3_SRS10  0
 258     int32_t CP0_SRSConf4_rw_bitmask;
 259     int32_t CP0_SRSConf4;
 260 #define CP0SRSC4_SRS15  20
 261 #define CP0SRSC4_SRS14  10
 262 #define CP0SRSC4_SRS13  0
 263     int32_t CP0_HWREna;
 264     target_ulong CP0_BadVAddr;
 265     int32_t CP0_Count;
 266     target_ulong CP0_EntryHi;
 267     int32_t CP0_Compare;
 268     int32_t CP0_Status;
 269 #define CP0St_CU3   31
 270 #define CP0St_CU2   30
 271 #define CP0St_CU1   29
 272 #define CP0St_CU0   28
 273 #define CP0St_RP    27
 274 #define CP0St_FR    26
 275 #define CP0St_RE    25
 276 #define CP0St_MX    24
 277 #define CP0St_PX    23
 278 #define CP0St_BEV   22
 279 #define CP0St_TS    21
 280 #define CP0St_SR    20
 281 #define CP0St_NMI   19
 282 #define CP0St_IM    8
 283 #define CP0St_KX    7
 284 #define CP0St_SX    6
 285 #define CP0St_UX    5
 286 #define CP0St_UM    4
 287 #define CP0St_R0    3
 288 #define CP0St_ERL   2
 289 #define CP0St_EXL   1
 290 #define CP0St_IE    0
 291     int32_t CP0_IntCtl;
 292 #define CP0IntCtl_IPTI 29
 293 #define CP0IntCtl_IPPC1 26
 294 #define CP0IntCtl_VS 5
 295     int32_t CP0_SRSCtl;
 296 #define CP0SRSCtl_HSS 26
 297 #define CP0SRSCtl_EICSS 18
 298 #define CP0SRSCtl_ESS 12
 299 #define CP0SRSCtl_PSS 6
 300 #define CP0SRSCtl_CSS 0
 301     int32_t CP0_SRSMap;
 302 #define CP0SRSMap_SSV7 28
 303 #define CP0SRSMap_SSV6 24
 304 #define CP0SRSMap_SSV5 20
 305 #define CP0SRSMap_SSV4 16
 306 #define CP0SRSMap_SSV3 12
 307 #define CP0SRSMap_SSV2 8
 308 #define CP0SRSMap_SSV1 4
 309 #define CP0SRSMap_SSV0 0
 310     int32_t CP0_Cause;
 311 #define CP0Ca_BD   31
 312 #define CP0Ca_TI   30
 313 #define CP0Ca_CE   28
 314 #define CP0Ca_DC   27
 315 #define CP0Ca_PCI  26
 316 #define CP0Ca_IV   23
 317 #define CP0Ca_WP   22
 318 #define CP0Ca_IP    8
 319 #define CP0Ca_IP_mask 0x0000FF00
 320 #define CP0Ca_EC    2
 321     target_ulong CP0_EPC;
 322     int32_t CP0_PRid;
 323     int32_t CP0_EBase;
 324     int32_t CP0_Config0;
 325 #define CP0C0_M    31
 326 #define CP0C0_K23  28
 327 #define CP0C0_KU   25
 328 #define CP0C0_MDU  20
 329 #define CP0C0_MM   17
 330 #define CP0C0_BM   16
 331 #define CP0C0_BE   15
 332 #define CP0C0_AT   13
 333 #define CP0C0_AR   10
 334 #define CP0C0_MT   7
 335 #define CP0C0_VI   3
 336 #define CP0C0_K0   0
 337     int32_t CP0_Config1;
 338 #define CP0C1_M    31
 339 #define CP0C1_MMU  25
 340 #define CP0C1_IS   22
 341 #define CP0C1_IL   19
 342 #define CP0C1_IA   16
 343 #define CP0C1_DS   13
 344 #define CP0C1_DL   10
 345 #define CP0C1_DA   7
 346 #define CP0C1_C2   6
 347 #define CP0C1_MD   5
 348 #define CP0C1_PC   4
 349 #define CP0C1_WR   3
 350 #define CP0C1_CA   2
 351 #define CP0C1_EP   1
 352 #define CP0C1_FP   0
 353     int32_t CP0_Config2;
 354 #define CP0C2_M    31
 355 #define CP0C2_TU   28
 356 #define CP0C2_TS   24
 357 #define CP0C2_TL   20
 358 #define CP0C2_TA   16
 359 #define CP0C2_SU   12
 360 #define CP0C2_SS   8
 361 #define CP0C2_SL   4
 362 #define CP0C2_SA   0
 363     int32_t CP0_Config3;
 364 #define CP0C3_M    31
 365 #define CP0C3_DSPP 10
 366 #define CP0C3_LPA  7
 367 #define CP0C3_VEIC 6
 368 #define CP0C3_VInt 5
 369 #define CP0C3_SP   4
 370 #define CP0C3_MT   2
 371 #define CP0C3_SM   1
 372 #define CP0C3_TL   0
 373     int32_t CP0_Config6;
 374     int32_t CP0_Config7;
 375     /* XXX: Maybe make LLAddr per-TC? */
 376     target_ulong CP0_LLAddr;
 377     target_ulong CP0_WatchLo[8];
 378     int32_t CP0_WatchHi[8];
 379     target_ulong CP0_XContext;
 380     int32_t CP0_Framemask;
 381     int32_t CP0_Debug;
 382 #define CP0DB_DBD  31
 383 #define CP0DB_DM   30
 384 #define CP0DB_LSNM 28
 385 #define CP0DB_Doze 27
 386 #define CP0DB_Halt 26
 387 #define CP0DB_CNT  25
 388 #define CP0DB_IBEP 24
 389 #define CP0DB_DBEP 21
 390 #define CP0DB_IEXI 20
 391 #define CP0DB_VER  15
 392 #define CP0DB_DEC  10
 393 #define CP0DB_SSt  8
 394 #define CP0DB_DINT 5
 395 #define CP0DB_DIB  4
 396 #define CP0DB_DDBS 3
 397 #define CP0DB_DDBL 2
 398 #define CP0DB_DBp  1
 399 #define CP0DB_DSS  0
 400     int32_t CP0_Debug_tcstatus[MIPS_TC_MAX];
 401     target_ulong CP0_DEPC;
 402     int32_t CP0_Performance0;
 403     int32_t CP0_TagLo;
 404     int32_t CP0_DataLo;
 405     int32_t CP0_TagHi;
 406     int32_t CP0_DataHi;
 407     target_ulong CP0_ErrorEPC;
 408     int32_t CP0_DESAVE;
 409     /* Qemu */
 410     int interrupt_request;
 411     jmp_buf jmp_env;
 412     int exception_index;
 413     int error_code;
 414     int user_mode_only; /* user mode only simulation */
 415     uint32_t hflags;    /* CPU State */
 416     /* TMASK defines different execution modes */
 417 #define MIPS_HFLAG_TMASK  0x00FF
 418 #define MIPS_HFLAG_MODE   0x0007 /* execution modes                    */
 419 #define MIPS_HFLAG_UM     0x0001 /* user mode                          */
 420 #define MIPS_HFLAG_DM     0x0002 /* Debug mode                         */
 421 #define MIPS_HFLAG_SM     0x0004 /* Supervisor mode                    */
 422 #define MIPS_HFLAG_64     0x0008 /* 64-bit instructions enabled        */
 423 #define MIPS_HFLAG_CP0    0x0010 /* CP0 enabled                        */
 424 #define MIPS_HFLAG_FPU    0x0020 /* FPU enabled                        */
 425 #define MIPS_HFLAG_F64    0x0040 /* 64-bit FPU enabled                 */
 426 #define MIPS_HFLAG_RE     0x0080 /* Reversed endianness                */
 427     /* If translation is interrupted between the branch instruction and
 428      * the delay slot, record what type of branch it is so that we can
 429      * resume translation properly.  It might be possible to reduce
 430      * this from three bits to two.  */
 431 #define MIPS_HFLAG_BMASK  0x0700
 432 #define MIPS_HFLAG_B      0x0100 /* Unconditional branch               */
 433 #define MIPS_HFLAG_BC     0x0200 /* Conditional branch                 */
 434 #define MIPS_HFLAG_BL     0x0300 /* Likely branch                      */
 435 #define MIPS_HFLAG_BR     0x0400 /* branch to register (can't link TB) */
 436     target_ulong btarget;        /* Jump / branch target               */
 437     int bcond;                   /* Branch condition (if needed)       */
 438
 439     int halted; /* TRUE if the CPU is in suspend state */
 440
 441     int SYNCI_Step; /* Address step size for SYNCI */
 442     int CCRes; /* Cycle count resolution/divisor */
 443     uint32_t CP0_Status_rw_bitmask; /* Read/write bits in CP0_Status */
 444     uint32_t CP0_TCStatus_rw_bitmask; /* Read/write bits in CP0_TCStatus */
 445     int insn_flags; /* Supported instruction set */
 446
 447 #ifdef CONFIG_USER_ONLY
 448     target_ulong tls_value;
 449 #endif
 450
 451     CPU_COMMON
 452
 453     int ram_size;
 454     const char *kernel_filename;
 455     const char *kernel_cmdline;
 456     const char *initrd_filename;
 457
 458     mips_def_t *cpu_model;
 459 #ifndef CONFIG_USER_ONLY
 460     void *irq[8];
 461 #endif
 462
 463     struct QEMUTimer *timer; /* Internal timer */
 464 };
 465
 466 int no_mmu_map_address (CPUMIPSState *env, target_ulong *physical, int *prot,
 467                         target_ulong address, int rw, int access_type);
 468 int fixed_mmu_map_address (CPUMIPSState *env, target_ulong *physical, int *prot,
 469                            target_ulong address, int rw, int access_type);
 470 int r4k_map_address (CPUMIPSState *env, target_ulong *physical, int *prot,
 471                      target_ulong address, int rw, int access_type);
 472 void r4k_do_tlbwi (void);
 473 void r4k_do_tlbwr (void);
 474 void r4k_do_tlbp (void);
 475 void r4k_do_tlbr (void);
 476 int mips_find_by_name (const unsigned char *name, mips_def_t **def);
 477 void mips_cpu_list (FILE *f, int (*cpu_fprintf)(FILE *f, const char *fmt, ...));
 478 int cpu_mips_register (CPUMIPSState *env, mips_def_t *def);
 479
 480 #define CPUState CPUMIPSState
 481 #define cpu_init cpu_mips_init
 482 #define cpu_exec cpu_mips_exec
 483 #define cpu_gen_code cpu_mips_gen_code
 484 #define cpu_signal_handler cpu_mips_signal_handler
 485
 486 #include "cpu-all.h"
 487
 488 /* Memory access type :
 489  * may be needed for precise access rights control and precise exceptions.
 490  */
 491 enum {
 492     /* 1 bit to define user level / supervisor access */
 493     ACCESS_USER  = 0x00,
 494     ACCESS_SUPER = 0x01,
 495     /* 1 bit to indicate direction */
 496     ACCESS_STORE = 0x02,
 497     /* Type of instruction that generated the access */
 498     ACCESS_CODE  = 0x10, /* Code fetch access                */
 499     ACCESS_INT   = 0x20, /* Integer load/store access        */
 500     ACCESS_FLOAT = 0x30, /* floating point load/store access */
 501 };
 502
 503 /* Exceptions */
 504 enum {
 505     EXCP_NONE          = -1,
 506     EXCP_RESET         = 0,
 507     EXCP_SRESET,
 508     EXCP_DSS,
 509     EXCP_DINT,
 510     EXCP_NMI,
 511     EXCP_MCHECK,
 512     EXCP_EXT_INTERRUPT,
 513     EXCP_DFWATCH,
 514     EXCP_DIB, /* 8 */
 515     EXCP_IWATCH,
 516     EXCP_AdEL,
 517     EXCP_AdES,
 518     EXCP_TLBF,
 519     EXCP_IBE,
 520     EXCP_DBp,
 521     EXCP_SYSCALL,
 522     EXCP_BREAK, /* 16 */
 523     EXCP_CpU,
 524     EXCP_RI,
 525     EXCP_OVERFLOW,
 526     EXCP_TRAP,
 527     EXCP_FPE,
 528     EXCP_DDBS,
 529     EXCP_DWATCH,
 530     EXCP_LAE, /* 24 */
 531     EXCP_SAE,
 532     EXCP_LTLBL,
 533     EXCP_TLBL,
 534     EXCP_TLBS,
 535     EXCP_DBE,
 536     EXCP_DDBL,
 537     EXCP_THREAD,
 538     EXCP_MTCP0         = 0x104, /* mtmsr instruction:               */
 539                                 /* may change privilege level       */
 540     EXCP_BRANCH        = 0x108, /* branch instruction               */
 541     EXCP_ERET          = 0x10C, /* return from interrupt            */
 542     EXCP_SYSCALL_USER  = 0x110, /* System call in user mode only    */
 543     EXCP_FLUSH         = 0x109,
 544 };
 545
 546 int cpu_mips_exec(CPUMIPSState *s);
 547 CPUMIPSState *cpu_mips_init(void);
 548 uint32_t cpu_mips_get_clock (void);
 549 int cpu_mips_signal_handler(int host_signum, void *pinfo, void *puc);
 550
 551 #endif /* !defined (__MIPS_CPU_H__) */