target-mips/cpu.h

   1 #if !defined (__MIPS_CPU_H__)
   2 #define __MIPS_CPU_H__
   3
   4 //#define DEBUG_OP
   5
   6 #define ALIGNED_ONLY
   7
   8 #define CPUArchState struct CPUMIPSState
   9
  10 #include "config.h"
  11 #include "qemu-common.h"
  12 #include "mips-defs.h"
  13 #include "exec/cpu-defs.h"
  14 #include "fpu/softfloat.h"
  15
  16 struct CPUMIPSState;
  17
  18 typedef struct r4k_tlb_t r4k_tlb_t;
  19 struct r4k_tlb_t {
  20     target_ulong VPN;
  21     uint32_t PageMask;
  22     uint_fast8_t ASID;
  23     uint_fast16_t G:1;
  24     uint_fast16_t C0:3;
  25     uint_fast16_t C1:3;
  26     uint_fast16_t V0:1;
  27     uint_fast16_t V1:1;
  28     uint_fast16_t D0:1;
  29     uint_fast16_t D1:1;
  30     uint_fast16_t XI0:1;
  31     uint_fast16_t XI1:1;
  32     uint_fast16_t RI0:1;
  33     uint_fast16_t RI1:1;
  34     uint_fast16_t EHINV:1;
  35     uint64_t PFN[2];
  36 };
  37
  38 #if !defined(CONFIG_USER_ONLY)
  39 typedef struct CPUMIPSTLBContext CPUMIPSTLBContext;
  40 struct CPUMIPSTLBContext {
  41     uint32_t nb_tlb;
  42     uint32_t tlb_in_use;
  43     int (*map_address) (struct CPUMIPSState *env, hwaddr *physical, int *prot, target_ulong address, int rw, int access_type);
  44     void (*helper_tlbwi)(struct CPUMIPSState *env);
  45     void (*helper_tlbwr)(struct CPUMIPSState *env);
  46     void (*helper_tlbp)(struct CPUMIPSState *env);
  47     void (*helper_tlbr)(struct CPUMIPSState *env);
  48     void (*helper_tlbinv)(struct CPUMIPSState *env);
  49     void (*helper_tlbinvf)(struct CPUMIPSState *env);
  50     union {
  51         struct {
  52             r4k_tlb_t tlb[MIPS_TLB_MAX];
  53         } r4k;
  54     } mmu;
  55 };
  56 #endif
  57
  58 /* MSA Context */
  59 #define MSA_WRLEN (128)
  60
  61 enum CPUMIPSMSADataFormat {
  62     DF_BYTE = 0,
  63     DF_HALF,
  64     DF_WORD,
  65     DF_DOUBLE
  66 };
  67
  68 typedef union wr_t wr_t;
  69 union wr_t {
  70     int8_t  b[MSA_WRLEN/8];
  71     int16_t h[MSA_WRLEN/16];
  72     int32_t w[MSA_WRLEN/32];
  73     int64_t d[MSA_WRLEN/64];
  74 };
  75
  76 typedef union fpr_t fpr_t;
  77 union fpr_t {
  78     float64  fd;   /* ieee double precision */
  79     float32  fs[2];/* ieee single precision */
  80     uint64_t d;    /* binary double fixed-point */
  81     uint32_t w[2]; /* binary single fixed-point */
  82 /* FPU/MSA register mapping is not tested on big-endian hosts. */
  83     wr_t     wr;   /* vector data */
  84 };
  85 /* define FP_ENDIAN_IDX to access the same location
  86  * in the fpr_t union regardless of the host endianness
  87  */
  88 #if defined(HOST_WORDS_BIGENDIAN)
  89 #  define FP_ENDIAN_IDX 1
  90 #else
  91 #  define FP_ENDIAN_IDX 0
  92 #endif
  93
  94 typedef struct CPUMIPSFPUContext CPUMIPSFPUContext;
  95 struct CPUMIPSFPUContext {
  96     /* Floating point registers */
  97     fpr_t fpr[32];
  98     float_status fp_status;
  99     /* fpu implementation/revision register (fir) */
 100     uint32_t fcr0;
 101 #define FCR0_FREP 29
 102 #define FCR0_UFRP 28
 103 #define FCR0_F64 22
 104 #define FCR0_L 21
 105 #define FCR0_W 20
 106 #define FCR0_3D 19
 107 #define FCR0_PS 18
 108 #define FCR0_D 17
 109 #define FCR0_S 16
 110 #define FCR0_PRID 8
 111 #define FCR0_REV 0
 112     /* fcsr */
 113     uint32_t fcr31;
 114 #define SET_FP_COND(num,env)     do { ((env).fcr31) |= ((num) ? (1 << ((num) + 24)) : (1 << 23)); } while(0)
 115 #define CLEAR_FP_COND(num,env)   do { ((env).fcr31) &= ~((num) ? (1 << ((num) + 24)) : (1 << 23)); } while(0)
 116 #define GET_FP_COND(env)         ((((env).fcr31 >> 24) & 0xfe) | (((env).fcr31 >> 23) & 0x1))
 117 #define GET_FP_CAUSE(reg)        (((reg) >> 12) & 0x3f)
 118 #define GET_FP_ENABLE(reg)       (((reg) >>  7) & 0x1f)
 119 #define GET_FP_FLAGS(reg)        (((reg) >>  2) & 0x1f)
 120 #define SET_FP_CAUSE(reg,v)      do { (reg) = ((reg) & ~(0x3f << 12)) | ((v & 0x3f) << 12); } while(0)
 121 #define SET_FP_ENABLE(reg,v)     do { (reg) = ((reg) & ~(0x1f <<  7)) | ((v & 0x1f) << 7); } while(0)
 122 #define SET_FP_FLAGS(reg,v)      do { (reg) = ((reg) & ~(0x1f <<  2)) | ((v & 0x1f) << 2); } while(0)
 123 #define UPDATE_FP_FLAGS(reg,v)   do { (reg) |= ((v & 0x1f) << 2); } while(0)
 124 #define FP_INEXACT        1
 125 #define FP_UNDERFLOW      2
 126 #define FP_OVERFLOW       4
 127 #define FP_DIV0           8
 128 #define FP_INVALID        16
 129 #define FP_UNIMPLEMENTED  32
 130 };
 131
 132 #define NB_MMU_MODES 3
 133 #define TARGET_INSN_START_EXTRA_WORDS 2
 134
 135 typedef struct CPUMIPSMVPContext CPUMIPSMVPContext;
 136 struct CPUMIPSMVPContext {
 137     int32_t CP0_MVPControl;
 138 #define CP0MVPCo_CPA    3
 139 #define CP0MVPCo_STLB   2
 140 #define CP0MVPCo_VPC    1
 141 #define CP0MVPCo_EVP    0
 142     int32_t CP0_MVPConf0;
 143 #define CP0MVPC0_M      31
 144 #define CP0MVPC0_TLBS   29
 145 #define CP0MVPC0_GS     28
 146 #define CP0MVPC0_PCP    27
 147 #define CP0MVPC0_PTLBE  16
 148 #define CP0MVPC0_TCA    15
 149 #define CP0MVPC0_PVPE   10
 150 #define CP0MVPC0_PTC    0
 151     int32_t CP0_MVPConf1;
 152 #define CP0MVPC1_CIM    31
 153 #define CP0MVPC1_CIF    30
 154 #define CP0MVPC1_PCX    20
 155 #define CP0MVPC1_PCP2   10
 156 #define CP0MVPC1_PCP1   0
 157 };
 158
 159 typedef struct mips_def_t mips_def_t;
 160
 161 #define MIPS_SHADOW_SET_MAX 16
 162 #define MIPS_TC_MAX 5
 163 #define MIPS_FPU_MAX 1
 164 #define MIPS_DSP_ACC 4
 165 #define MIPS_KSCRATCH_NUM 6
 166
 167 typedef struct TCState TCState;
 168 struct TCState {
 169     target_ulong gpr[32];
 170     target_ulong PC;
 171     target_ulong HI[MIPS_DSP_ACC];
 172     target_ulong LO[MIPS_DSP_ACC];
 173     target_ulong ACX[MIPS_DSP_ACC];
 174     target_ulong DSPControl;
 175     int32_t CP0_TCStatus;
 176 #define CP0TCSt_TCU3    31
 177 #define CP0TCSt_TCU2    30
 178 #define CP0TCSt_TCU1    29
 179 #define CP0TCSt_TCU0    28
 180 #define CP0TCSt_TMX     27
 181 #define CP0TCSt_RNST    23
 182 #define CP0TCSt_TDS     21
 183 #define CP0TCSt_DT      20
 184 #define CP0TCSt_DA      15
 185 #define CP0TCSt_A       13
 186 #define CP0TCSt_TKSU    11
 187 #define CP0TCSt_IXMT    10
 188 #define CP0TCSt_TASID   0
 189     int32_t CP0_TCBind;
 190 #define CP0TCBd_CurTC   21
 191 #define CP0TCBd_TBE     17
 192 #define CP0TCBd_CurVPE  0
 193     target_ulong CP0_TCHalt;
 194     target_ulong CP0_TCContext;
 195     target_ulong CP0_TCSchedule;
 196     target_ulong CP0_TCScheFBack;
 197     int32_t CP0_Debug_tcstatus;
 198     target_ulong CP0_UserLocal;
 199
 200     int32_t msacsr;
 201
 202 #define MSACSR_FS       24
 203 #define MSACSR_FS_MASK  (1 << MSACSR_FS)
 204 #define MSACSR_NX       18
 205 #define MSACSR_NX_MASK  (1 << MSACSR_NX)
 206 #define MSACSR_CEF      2
 207 #define MSACSR_CEF_MASK (0xffff << MSACSR_CEF)
 208 #define MSACSR_RM       0
 209 #define MSACSR_RM_MASK  (0x3 << MSACSR_RM)
 210 #define MSACSR_MASK     (MSACSR_RM_MASK | MSACSR_CEF_MASK | MSACSR_NX_MASK | \
 211         MSACSR_FS_MASK)
 212
 213     float_status msa_fp_status;
 214 };
 215
 216 typedef struct CPUMIPSState CPUMIPSState;
 217 struct CPUMIPSState {
 218     TCState active_tc;
 219     CPUMIPSFPUContext active_fpu;
 220
 221     uint32_t current_tc;
 222     uint32_t current_fpu;
 223
 224     uint32_t SEGBITS;
 225     uint32_t PABITS;
 226 #if defined(TARGET_MIPS64)
 227 # define PABITS_BASE 36
 228 #else
 229 # define PABITS_BASE 32
 230 #endif
 231     target_ulong SEGMask;
 232     uint64_t PAMask;
 233 #define PAMASK_BASE ((1ULL << PABITS_BASE) - 1)
 234
 235     int32_t msair;
 236 #define MSAIR_ProcID    8
 237 #define MSAIR_Rev       0
 238
 239     int32_t CP0_Index;
 240     /* CP0_MVP* are per MVP registers. */
 241     int32_t CP0_Random;
 242     int32_t CP0_VPEControl;
 243 #define CP0VPECo_YSI    21
 244 #define CP0VPECo_GSI    20
 245 #define CP0VPECo_EXCPT  16
 246 #define CP0VPECo_TE     15
 247 #define CP0VPECo_TargTC 0
 248     int32_t CP0_VPEConf0;
 249 #define CP0VPEC0_M      31
 250 #define CP0VPEC0_XTC    21
 251 #define CP0VPEC0_TCS    19
 252 #define CP0VPEC0_SCS    18
 253 #define CP0VPEC0_DSC    17
 254 #define CP0VPEC0_ICS    16
 255 #define CP0VPEC0_MVP    1
 256 #define CP0VPEC0_VPA    0
 257     int32_t CP0_VPEConf1;
 258 #define CP0VPEC1_NCX    20
 259 #define CP0VPEC1_NCP2   10
 260 #define CP0VPEC1_NCP1   0
 261     target_ulong CP0_YQMask;
 262     target_ulong CP0_VPESchedule;
 263     target_ulong CP0_VPEScheFBack;
 264     int32_t CP0_VPEOpt;
 265 #define CP0VPEOpt_IWX7  15
 266 #define CP0VPEOpt_IWX6  14
 267 #define CP0VPEOpt_IWX5  13
 268 #define CP0VPEOpt_IWX4  12
 269 #define CP0VPEOpt_IWX3  11
 270 #define CP0VPEOpt_IWX2  10
 271 #define CP0VPEOpt_IWX1  9
 272 #define CP0VPEOpt_IWX0  8
 273 #define CP0VPEOpt_DWX7  7
 274 #define CP0VPEOpt_DWX6  6
 275 #define CP0VPEOpt_DWX5  5
 276 #define CP0VPEOpt_DWX4  4
 277 #define CP0VPEOpt_DWX3  3
 278 #define CP0VPEOpt_DWX2  2
 279 #define CP0VPEOpt_DWX1  1
 280 #define CP0VPEOpt_DWX0  0
 281     uint64_t CP0_EntryLo0;
 282     uint64_t CP0_EntryLo1;
 283 #if defined(TARGET_MIPS64)
 284 # define CP0EnLo_RI 63
 285 # define CP0EnLo_XI 62
 286 #else
 287 # define CP0EnLo_RI 31
 288 # define CP0EnLo_XI 30
 289 #endif
 290     target_ulong CP0_Context;
 291     target_ulong CP0_KScratch[MIPS_KSCRATCH_NUM];
 292     int32_t CP0_PageMask;
 293     int32_t CP0_PageGrain_rw_bitmask;
 294     int32_t CP0_PageGrain;
 295 #define CP0PG_RIE 31
 296 #define CP0PG_XIE 30
 297 #define CP0PG_ELPA 29
 298 #define CP0PG_IEC 27
 299     int32_t CP0_Wired;
 300     int32_t CP0_SRSConf0_rw_bitmask;
 301     int32_t CP0_SRSConf0;
 302 #define CP0SRSC0_M      31
 303 #define CP0SRSC0_SRS3   20
 304 #define CP0SRSC0_SRS2   10
 305 #define CP0SRSC0_SRS1   0
 306     int32_t CP0_SRSConf1_rw_bitmask;
 307     int32_t CP0_SRSConf1;
 308 #define CP0SRSC1_M      31
 309 #define CP0SRSC1_SRS6   20
 310 #define CP0SRSC1_SRS5   10
 311 #define CP0SRSC1_SRS4   0
 312     int32_t CP0_SRSConf2_rw_bitmask;
 313     int32_t CP0_SRSConf2;
 314 #define CP0SRSC2_M      31
 315 #define CP0SRSC2_SRS9   20
 316 #define CP0SRSC2_SRS8   10
 317 #define CP0SRSC2_SRS7   0
 318     int32_t CP0_SRSConf3_rw_bitmask;
 319     int32_t CP0_SRSConf3;
 320 #define CP0SRSC3_M      31
 321 #define CP0SRSC3_SRS12  20
 322 #define CP0SRSC3_SRS11  10
 323 #define CP0SRSC3_SRS10  0
 324     int32_t CP0_SRSConf4_rw_bitmask;
 325     int32_t CP0_SRSConf4;
 326 #define CP0SRSC4_SRS15  20
 327 #define CP0SRSC4_SRS14  10
 328 #define CP0SRSC4_SRS13  0
 329     int32_t CP0_HWREna;
 330     target_ulong CP0_BadVAddr;
 331     uint32_t CP0_BadInstr;
 332     uint32_t CP0_BadInstrP;
 333     int32_t CP0_Count;
 334     target_ulong CP0_EntryHi;
 335 #define CP0EnHi_EHINV 10
 336     int32_t CP0_Compare;
 337     int32_t CP0_Status;
 338 #define CP0St_CU3   31
 339 #define CP0St_CU2   30
 340 #define CP0St_CU1   29
 341 #define CP0St_CU0   28
 342 #define CP0St_RP    27
 343 #define CP0St_FR    26
 344 #define CP0St_RE    25
 345 #define CP0St_MX    24
 346 #define CP0St_PX    23
 347 #define CP0St_BEV   22
 348 #define CP0St_TS    21
 349 #define CP0St_SR    20
 350 #define CP0St_NMI   19
 351 #define CP0St_IM    8
 352 #define CP0St_KX    7
 353 #define CP0St_SX    6
 354 #define CP0St_UX    5
 355 #define CP0St_KSU   3
 356 #define CP0St_ERL   2
 357 #define CP0St_EXL   1
 358 #define CP0St_IE    0
 359     int32_t CP0_IntCtl;
 360 #define CP0IntCtl_IPTI 29
 361 #define CP0IntCtl_IPPC1 26
 362 #define CP0IntCtl_VS 5
 363     int32_t CP0_SRSCtl;
 364 #define CP0SRSCtl_HSS 26
 365 #define CP0SRSCtl_EICSS 18
 366 #define CP0SRSCtl_ESS 12
 367 #define CP0SRSCtl_PSS 6
 368 #define CP0SRSCtl_CSS 0
 369     int32_t CP0_SRSMap;
 370 #define CP0SRSMap_SSV7 28
 371 #define CP0SRSMap_SSV6 24
 372 #define CP0SRSMap_SSV5 20
 373 #define CP0SRSMap_SSV4 16
 374 #define CP0SRSMap_SSV3 12
 375 #define CP0SRSMap_SSV2 8
 376 #define CP0SRSMap_SSV1 4
 377 #define CP0SRSMap_SSV0 0
 378     int32_t CP0_Cause;
 379 #define CP0Ca_BD   31
 380 #define CP0Ca_TI   30
 381 #define CP0Ca_CE   28
 382 #define CP0Ca_DC   27
 383 #define CP0Ca_PCI  26
 384 #define CP0Ca_IV   23
 385 #define CP0Ca_WP   22
 386 #define CP0Ca_IP    8
 387 #define CP0Ca_IP_mask 0x0000FF00
 388 #define CP0Ca_EC    2
 389     target_ulong CP0_EPC;
 390     int32_t CP0_PRid;
 391     int32_t CP0_EBase;
 392     int32_t CP0_Config0;
 393 #define CP0C0_M    31
 394 #define CP0C0_K23  28
 395 #define CP0C0_KU   25
 396 #define CP0C0_MDU  20
 397 #define CP0C0_MM   18
 398 #define CP0C0_BM   16
 399 #define CP0C0_BE   15
 400 #define CP0C0_AT   13
 401 #define CP0C0_AR   10
 402 #define CP0C0_MT   7
 403 #define CP0C0_VI   3
 404 #define CP0C0_K0   0
 405     int32_t CP0_Config1;
 406 #define CP0C1_M    31
 407 #define CP0C1_MMU  25
 408 #define CP0C1_IS   22
 409 #define CP0C1_IL   19
 410 #define CP0C1_IA   16
 411 #define CP0C1_DS   13
 412 #define CP0C1_DL   10
 413 #define CP0C1_DA   7
 414 #define CP0C1_C2   6
 415 #define CP0C1_MD   5
 416 #define CP0C1_PC   4
 417 #define CP0C1_WR   3
 418 #define CP0C1_CA   2
 419 #define CP0C1_EP   1
 420 #define CP0C1_FP   0
 421     int32_t CP0_Config2;
 422 #define CP0C2_M    31
 423 #define CP0C2_TU   28
 424 #define CP0C2_TS   24
 425 #define CP0C2_TL   20
 426 #define CP0C2_TA   16
 427 #define CP0C2_SU   12
 428 #define CP0C2_SS   8
 429 #define CP0C2_SL   4
 430 #define CP0C2_SA   0
 431     int32_t CP0_Config3;
 432 #define CP0C3_M    31
 433 #define CP0C3_BPG  30
 434 #define CP0C3_CMCGR 29
 435 #define CP0C3_MSAP  28
 436 #define CP0C3_BP 27
 437 #define CP0C3_BI 26
 438 #define CP0C3_IPLW 21
 439 #define CP0C3_MMAR 18
 440 #define CP0C3_MCU  17
 441 #define CP0C3_ISA_ON_EXC 16
 442 #define CP0C3_ISA  14
 443 #define CP0C3_ULRI 13
 444 #define CP0C3_RXI  12
 445 #define CP0C3_DSP2P 11
 446 #define CP0C3_DSPP 10
 447 #define CP0C3_LPA  7
 448 #define CP0C3_VEIC 6
 449 #define CP0C3_VInt 5
 450 #define CP0C3_SP   4
 451 #define CP0C3_CDMM 3
 452 #define CP0C3_MT   2
 453 #define CP0C3_SM   1
 454 #define CP0C3_TL   0
 455     int32_t CP0_Config4;
 456     int32_t CP0_Config4_rw_bitmask;
 457 #define CP0C4_M    31
 458 #define CP0C4_IE   29
 459 #define CP0C4_KScrExist 16
 460 #define CP0C4_MMUExtDef 14
 461 #define CP0C4_FTLBPageSize 8
 462 #define CP0C4_FTLBWays 4
 463 #define CP0C4_FTLBSets 0
 464 #define CP0C4_MMUSizeExt 0
 465     int32_t CP0_Config5;
 466     int32_t CP0_Config5_rw_bitmask;
 467 #define CP0C5_M          31
 468 #define CP0C5_K          30
 469 #define CP0C5_CV         29
 470 #define CP0C5_EVA        28
 471 #define CP0C5_MSAEn      27
 472 #define CP0C5_XNP        13
 473 #define CP0C5_UFE        9
 474 #define CP0C5_FRE        8
 475 #define CP0C5_SBRI       6
 476 #define CP0C5_MVH        5
 477 #define CP0C5_LLB        4
 478 #define CP0C5_UFR        2
 479 #define CP0C5_NFExists   0
 480     int32_t CP0_Config6;
 481     int32_t CP0_Config7;
 482     /* XXX: Maybe make LLAddr per-TC? */
 483     uint64_t lladdr;
 484     target_ulong llval;
 485     target_ulong llnewval;
 486     target_ulong llreg;
 487     uint64_t CP0_LLAddr_rw_bitmask;
 488     int CP0_LLAddr_shift;
 489     target_ulong CP0_WatchLo[8];
 490     int32_t CP0_WatchHi[8];
 491     target_ulong CP0_XContext;
 492     int32_t CP0_Framemask;
 493     int32_t CP0_Debug;
 494 #define CP0DB_DBD  31
 495 #define CP0DB_DM   30
 496 #define CP0DB_LSNM 28
 497 #define CP0DB_Doze 27
 498 #define CP0DB_Halt 26
 499 #define CP0DB_CNT  25
 500 #define CP0DB_IBEP 24
 501 #define CP0DB_DBEP 21
 502 #define CP0DB_IEXI 20
 503 #define CP0DB_VER  15
 504 #define CP0DB_DEC  10
 505 #define CP0DB_SSt  8
 506 #define CP0DB_DINT 5
 507 #define CP0DB_DIB  4
 508 #define CP0DB_DDBS 3
 509 #define CP0DB_DDBL 2
 510 #define CP0DB_DBp  1
 511 #define CP0DB_DSS  0
 512     target_ulong CP0_DEPC;
 513     int32_t CP0_Performance0;
 514     uint64_t CP0_TagLo;
 515     int32_t CP0_DataLo;
 516     int32_t CP0_TagHi;
 517     int32_t CP0_DataHi;
 518     target_ulong CP0_ErrorEPC;
 519     int32_t CP0_DESAVE;
 520     /* We waste some space so we can handle shadow registers like TCs. */
 521     TCState tcs[MIPS_SHADOW_SET_MAX];
 522     CPUMIPSFPUContext fpus[MIPS_FPU_MAX];
 523     /* QEMU */
 524     int error_code;
 525 #define EXCP_TLB_NOMATCH   0x1
 526 #define EXCP_INST_NOTAVAIL 0x2 /* No valid instruction word for BadInstr */
 527     uint32_t hflags;    /* CPU State */
 528     /* TMASK defines different execution modes */
 529 #define MIPS_HFLAG_TMASK  0x75807FF
 530 #define MIPS_HFLAG_MODE   0x00007 /* execution modes                    */
 531     /* The KSU flags must be the lowest bits in hflags. The flag order
 532        must be the same as defined for CP0 Status. This allows to use
 533        the bits as the value of mmu_idx. */
 534 #define MIPS_HFLAG_KSU    0x00003 /* kernel/supervisor/user mode mask   */
 535 #define MIPS_HFLAG_UM     0x00002 /* user mode flag                     */
 536 #define MIPS_HFLAG_SM     0x00001 /* supervisor mode flag               */
 537 #define MIPS_HFLAG_KM     0x00000 /* kernel mode flag                   */
 538 #define MIPS_HFLAG_DM     0x00004 /* Debug mode                         */
 539 #define MIPS_HFLAG_64     0x00008 /* 64-bit instructions enabled        */
 540 #define MIPS_HFLAG_CP0    0x00010 /* CP0 enabled                        */
 541 #define MIPS_HFLAG_FPU    0x00020 /* FPU enabled                        */
 542 #define MIPS_HFLAG_F64    0x00040 /* 64-bit FPU enabled                 */
 543     /* True if the MIPS IV COP1X instructions can be used.  This also
 544        controls the non-COP1X instructions RECIP.S, RECIP.D, RSQRT.S
 545        and RSQRT.D.  */
 546 #define MIPS_HFLAG_COP1X  0x00080 /* COP1X instructions enabled         */
 547 #define MIPS_HFLAG_RE     0x00100 /* Reversed endianness                */
 548 #define MIPS_HFLAG_AWRAP  0x00200 /* 32-bit compatibility address wrapping */
 549 #define MIPS_HFLAG_M16    0x00400 /* MIPS16 mode flag                   */
 550 #define MIPS_HFLAG_M16_SHIFT 10
 551     /* If translation is interrupted between the branch instruction and
 552      * the delay slot, record what type of branch it is so that we can
 553      * resume translation properly.  It might be possible to reduce
 554      * this from three bits to two.  */
 555 #define MIPS_HFLAG_BMASK_BASE  0x803800
 556 #define MIPS_HFLAG_B      0x00800 /* Unconditional branch               */
 557 #define MIPS_HFLAG_BC     0x01000 /* Conditional branch                 */
 558 #define MIPS_HFLAG_BL     0x01800 /* Likely branch                      */
 559 #define MIPS_HFLAG_BR     0x02000 /* branch to register (can't link TB) */
 560     /* Extra flags about the current pending branch.  */
 561 #define MIPS_HFLAG_BMASK_EXT 0x7C000
 562 #define MIPS_HFLAG_B16    0x04000 /* branch instruction was 16 bits     */
 563 #define MIPS_HFLAG_BDS16  0x08000 /* branch requires 16-bit delay slot  */
 564 #define MIPS_HFLAG_BDS32  0x10000 /* branch requires 32-bit delay slot  */
 565 #define MIPS_HFLAG_BDS_STRICT  0x20000 /* Strict delay slot size */
 566 #define MIPS_HFLAG_BX     0x40000 /* branch exchanges execution mode    */
 567 #define MIPS_HFLAG_BMASK  (MIPS_HFLAG_BMASK_BASE | MIPS_HFLAG_BMASK_EXT)
 568     /* MIPS DSP resources access. */
 569 #define MIPS_HFLAG_DSP   0x080000  /* Enable access to MIPS DSP resources. */
 570 #define MIPS_HFLAG_DSPR2 0x100000  /* Enable access to MIPS DSPR2 resources. */
 571     /* Extra flag about HWREna register. */
 572 #define MIPS_HFLAG_HWRENA_ULR 0x200000 /* ULR bit from HWREna is set. */
 573 #define MIPS_HFLAG_SBRI  0x400000 /* R6 SDBBP causes RI excpt. in user mode */
 574 #define MIPS_HFLAG_FBNSLOT 0x800000 /* Forbidden slot                   */
 575 #define MIPS_HFLAG_MSA   0x1000000
 576 #define MIPS_HFLAG_FRE   0x2000000 /* FRE enabled */
 577 #define MIPS_HFLAG_ELPA  0x4000000
 578     target_ulong btarget;        /* Jump / branch target               */
 579     target_ulong bcond;          /* Branch condition (if needed)       */
 580
 581     int SYNCI_Step; /* Address step size for SYNCI */
 582     int CCRes; /* Cycle count resolution/divisor */
 583     uint32_t CP0_Status_rw_bitmask; /* Read/write bits in CP0_Status */
 584     uint32_t CP0_TCStatus_rw_bitmask; /* Read/write bits in CP0_TCStatus */
 585     int insn_flags; /* Supported instruction set */
 586
 587     CPU_COMMON
 588
 589     /* Fields from here on are preserved across CPU reset. */
 590     CPUMIPSMVPContext *mvp;
 591 #if !defined(CONFIG_USER_ONLY)
 592     CPUMIPSTLBContext *tlb;
 593 #endif
 594
 595     const mips_def_t *cpu_model;
 596     void *irq[8];
 597     QEMUTimer *timer; /* Internal timer */
 598 };
 599
 600 #include "cpu-qom.h"
 601
 602 #if !defined(CONFIG_USER_ONLY)
 603 int no_mmu_map_address (CPUMIPSState *env, hwaddr *physical, int *prot,
 604                         target_ulong address, int rw, int access_type);
 605 int fixed_mmu_map_address (CPUMIPSState *env, hwaddr *physical, int *prot,
 606                            target_ulong address, int rw, int access_type);
 607 int r4k_map_address (CPUMIPSState *env, hwaddr *physical, int *prot,
 608                      target_ulong address, int rw, int access_type);
 609 void r4k_helper_tlbwi(CPUMIPSState *env);
 610 void r4k_helper_tlbwr(CPUMIPSState *env);
 611 void r4k_helper_tlbp(CPUMIPSState *env);
 612 void r4k_helper_tlbr(CPUMIPSState *env);
 613 void r4k_helper_tlbinv(CPUMIPSState *env);
 614 void r4k_helper_tlbinvf(CPUMIPSState *env);
 615
 616 void mips_cpu_unassigned_access(CPUState *cpu, hwaddr addr,
 617                                 bool is_write, bool is_exec, int unused,
 618                                 unsigned size);
 619 #endif
 620
 621 void mips_cpu_list (FILE *f, fprintf_function cpu_fprintf);
 622
 623 #define cpu_exec cpu_mips_exec
 624 #define cpu_signal_handler cpu_mips_signal_handler
 625 #define cpu_list mips_cpu_list
 626
 627 extern void cpu_wrdsp(uint32_t rs, uint32_t mask_num, CPUMIPSState *env);
 628 extern uint32_t cpu_rddsp(uint32_t mask_num, CPUMIPSState *env);
 629
 630 /* MMU modes definitions. We carefully match the indices with our
 631    hflags layout. */
 632 #define MMU_MODE0_SUFFIX _kernel
 633 #define MMU_MODE1_SUFFIX _super
 634 #define MMU_MODE2_SUFFIX _user
 635 #define MMU_USER_IDX 2
 636 static inline int cpu_mmu_index (CPUMIPSState *env, bool ifetch)
 637 {
 638     return env->hflags & MIPS_HFLAG_KSU;
 639 }
 640
 641 static inline bool cpu_mips_hw_interrupts_enabled(CPUMIPSState *env)
 642 {
 643     return (env->CP0_Status & (1 << CP0St_IE)) &&
 644         !(env->CP0_Status & (1 << CP0St_EXL)) &&
 645         !(env->CP0_Status & (1 << CP0St_ERL)) &&
 646         !(env->hflags & MIPS_HFLAG_DM) &&
 647         /* Note that the TCStatus IXMT field is initialized to zero,
 648            and only MT capable cores can set it to one. So we don't
 649            need to check for MT capabilities here.  */
 650         !(env->active_tc.CP0_TCStatus & (1 << CP0TCSt_IXMT));
 651 }
 652
 653 /* Check if there is pending and not masked out interrupt */
 654 static inline bool cpu_mips_hw_interrupts_pending(CPUMIPSState *env)
 655 {
 656     int32_t pending;
 657     int32_t status;
 658     bool r;
 659
 660     pending = env->CP0_Cause & CP0Ca_IP_mask;
 661     status = env->CP0_Status & CP0Ca_IP_mask;
 662
 663     if (env->CP0_Config3 & (1 << CP0C3_VEIC)) {
 664         /* A MIPS configured with a vectorizing external interrupt controller
 665            will feed a vector into the Cause pending lines. The core treats
 666            the status lines as a vector level, not as indiviual masks.  */
 667         r = pending > status;
 668     } else {
 669         /* A MIPS configured with compatibility or VInt (Vectored Interrupts)
 670            treats the pending lines as individual interrupt lines, the status
 671            lines are individual masks.  */
 672         r = (pending & status) != 0;
 673     }
 674     return r;
 675 }
 676
 677 #include "exec/cpu-all.h"
 678
 679 /* Memory access type :
 680  * may be needed for precise access rights control and precise exceptions.
 681  */
 682 enum {
 683     /* 1 bit to define user level / supervisor access */
 684     ACCESS_USER  = 0x00,
 685     ACCESS_SUPER = 0x01,
 686     /* 1 bit to indicate direction */
 687     ACCESS_STORE = 0x02,
 688     /* Type of instruction that generated the access */
 689     ACCESS_CODE  = 0x10, /* Code fetch access                */
 690     ACCESS_INT   = 0x20, /* Integer load/store access        */
 691     ACCESS_FLOAT = 0x30, /* floating point load/store access */
 692 };
 693
 694 /* Exceptions */
 695 enum {
 696     EXCP_NONE          = -1,
 697     EXCP_RESET         = 0,
 698     EXCP_SRESET,
 699     EXCP_DSS,
 700     EXCP_DINT,
 701     EXCP_DDBL,
 702     EXCP_DDBS,
 703     EXCP_NMI,
 704     EXCP_MCHECK,
 705     EXCP_EXT_INTERRUPT, /* 8 */
 706     EXCP_DFWATCH,
 707     EXCP_DIB,
 708     EXCP_IWATCH,
 709     EXCP_AdEL,
 710     EXCP_AdES,
 711     EXCP_TLBF,
 712     EXCP_IBE,
 713     EXCP_DBp, /* 16 */
 714     EXCP_SYSCALL,
 715     EXCP_BREAK,
 716     EXCP_CpU,
 717     EXCP_RI,
 718     EXCP_OVERFLOW,
 719     EXCP_TRAP,
 720     EXCP_FPE,
 721     EXCP_DWATCH, /* 24 */
 722     EXCP_LTLBL,
 723     EXCP_TLBL,
 724     EXCP_TLBS,
 725     EXCP_DBE,
 726     EXCP_THREAD,
 727     EXCP_MDMX,
 728     EXCP_C2E,
 729     EXCP_CACHE, /* 32 */
 730     EXCP_DSPDIS,
 731     EXCP_MSADIS,
 732     EXCP_MSAFPE,
 733     EXCP_TLBXI,
 734     EXCP_TLBRI,
 735
 736     EXCP_LAST = EXCP_TLBRI,
 737 };
 738 /* Dummy exception for conditional stores.  */
 739 #define EXCP_SC 0x100
 740
 741 /*
 742  * This is an interrnally generated WAKE request line.
 743  * It is driven by the CPU itself. Raised when the MT
 744  * block wants to wake a VPE from an inactive state and
 745  * cleared when VPE goes from active to inactive.
 746  */
 747 #define CPU_INTERRUPT_WAKE CPU_INTERRUPT_TGT_INT_0
 748
 749 int cpu_mips_exec(CPUState *cpu);
 750 void mips_tcg_init(void);
 751 MIPSCPU *cpu_mips_init(const char *cpu_model);
 752 int cpu_mips_signal_handler(int host_signum, void *pinfo, void *puc);
 753
 754 #define cpu_init(cpu_model) CPU(cpu_mips_init(cpu_model))
 755
 756 /* TODO QOM'ify CPU reset and remove */
 757 void cpu_state_reset(CPUMIPSState *s);
 758
 759 /* mips_timer.c */
 760 uint32_t cpu_mips_get_random (CPUMIPSState *env);
 761 uint32_t cpu_mips_get_count (CPUMIPSState *env);
 762 void cpu_mips_store_count (CPUMIPSState *env, uint32_t value);
 763 void cpu_mips_store_compare (CPUMIPSState *env, uint32_t value);
 764 void cpu_mips_start_count(CPUMIPSState *env);
 765 void cpu_mips_stop_count(CPUMIPSState *env);
 766
 767 /* mips_int.c */
 768 void cpu_mips_soft_irq(CPUMIPSState *env, int irq, int level);
 769
 770 /* helper.c */
 771 int mips_cpu_handle_mmu_fault(CPUState *cpu, vaddr address, int rw,
 772                               int mmu_idx);
 773 #if !defined(CONFIG_USER_ONLY)
 774 void r4k_invalidate_tlb (CPUMIPSState *env, int idx, int use_extra);
 775 hwaddr cpu_mips_translate_address (CPUMIPSState *env, target_ulong address,
 776                                                int rw);
 777 #endif
 778 target_ulong exception_resume_pc (CPUMIPSState *env);
 779
 780 /* op_helper.c */
 781 extern unsigned int ieee_rm[];
 782 int ieee_ex_to_mips(int xcpt);
 783
 784 static inline void restore_rounding_mode(CPUMIPSState *env)
 785 {
 786     set_float_rounding_mode(ieee_rm[env->active_fpu.fcr31 & 3],
 787                             &env->active_fpu.fp_status);
 788 }
 789
 790 static inline void restore_flush_mode(CPUMIPSState *env)
 791 {
 792     set_flush_to_zero((env->active_fpu.fcr31 & (1 << 24)) != 0,
 793                       &env->active_fpu.fp_status);
 794 }
 795
 796 static inline void restore_fp_status(CPUMIPSState *env)
 797 {
 798     restore_rounding_mode(env);
 799     restore_flush_mode(env);
 800 }
 801
 802 static inline void restore_msa_fp_status(CPUMIPSState *env)
 803 {
 804     float_status *status = &env->active_tc.msa_fp_status;
 805     int rounding_mode = (env->active_tc.msacsr & MSACSR_RM_MASK) >> MSACSR_RM;
 806     bool flush_to_zero = (env->active_tc.msacsr & MSACSR_FS_MASK) != 0;
 807
 808     set_float_rounding_mode(ieee_rm[rounding_mode], status);
 809     set_flush_to_zero(flush_to_zero, status);
 810     set_flush_inputs_to_zero(flush_to_zero, status);
 811 }
 812
 813 static inline void restore_pamask(CPUMIPSState *env)
 814 {
 815     if (env->hflags & MIPS_HFLAG_ELPA) {
 816         env->PAMask = (1ULL << env->PABITS) - 1;
 817     } else {
 818         env->PAMask = PAMASK_BASE;
 819     }
 820 }
 821
 822 static inline void cpu_get_tb_cpu_state(CPUMIPSState *env, target_ulong *pc,
 823                                         target_ulong *cs_base, int *flags)
 824 {
 825     *pc = env->active_tc.PC;
 826     *cs_base = 0;
 827     *flags = env->hflags & (MIPS_HFLAG_TMASK | MIPS_HFLAG_BMASK |
 828                             MIPS_HFLAG_HWRENA_ULR);
 829 }
 830
 831 static inline int mips_vpe_active(CPUMIPSState *env)
 832 {
 833     int active = 1;
 834
 835     /* Check that the VPE is enabled.  */
 836     if (!(env->mvp->CP0_MVPControl & (1 << CP0MVPCo_EVP))) {
 837         active = 0;
 838     }
 839     /* Check that the VPE is activated.  */
 840     if (!(env->CP0_VPEConf0 & (1 << CP0VPEC0_VPA))) {
 841         active = 0;
 842     }
 843
 844     /* Now verify that there are active thread contexts in the VPE.
 845
 846        This assumes the CPU model will internally reschedule threads
 847        if the active one goes to sleep. If there are no threads available
 848        the active one will be in a sleeping state, and we can turn off
 849        the entire VPE.  */
 850     if (!(env->active_tc.CP0_TCStatus & (1 << CP0TCSt_A))) {
 851         /* TC is not activated.  */
 852         active = 0;
 853     }
 854     if (env->active_tc.CP0_TCHalt & 1) {
 855         /* TC is in halt state.  */
 856         active = 0;
 857     }
 858
 859     return active;
 860 }
 861
 862 #include "exec/exec-all.h"
 863
 864 static inline void compute_hflags(CPUMIPSState *env)
 865 {
 866     env->hflags &= ~(MIPS_HFLAG_COP1X | MIPS_HFLAG_64 | MIPS_HFLAG_CP0 |
 867                      MIPS_HFLAG_F64 | MIPS_HFLAG_FPU | MIPS_HFLAG_KSU |
 868                      MIPS_HFLAG_AWRAP | MIPS_HFLAG_DSP | MIPS_HFLAG_DSPR2 |
 869                      MIPS_HFLAG_SBRI | MIPS_HFLAG_MSA | MIPS_HFLAG_FRE |
 870                      MIPS_HFLAG_ELPA);
 871     if (!(env->CP0_Status & (1 << CP0St_EXL)) &&
 872         !(env->CP0_Status & (1 << CP0St_ERL)) &&
 873         !(env->hflags & MIPS_HFLAG_DM)) {
 874         env->hflags |= (env->CP0_Status >> CP0St_KSU) & MIPS_HFLAG_KSU;
 875     }
 876 #if defined(TARGET_MIPS64)
 877     if ((env->insn_flags & ISA_MIPS3) &&
 878         (((env->hflags & MIPS_HFLAG_KSU) != MIPS_HFLAG_UM) ||
 879          (env->CP0_Status & (1 << CP0St_PX)) ||
 880          (env->CP0_Status & (1 << CP0St_UX)))) {
 881         env->hflags |= MIPS_HFLAG_64;
 882     }
 883
 884     if (!(env->insn_flags & ISA_MIPS3)) {
 885         env->hflags |= MIPS_HFLAG_AWRAP;
 886     } else if (((env->hflags & MIPS_HFLAG_KSU) == MIPS_HFLAG_UM) &&
 887                !(env->CP0_Status & (1 << CP0St_UX))) {
 888         env->hflags |= MIPS_HFLAG_AWRAP;
 889     } else if (env->insn_flags & ISA_MIPS64R6) {
 890         /* Address wrapping for Supervisor and Kernel is specified in R6 */
 891         if ((((env->hflags & MIPS_HFLAG_KSU) == MIPS_HFLAG_SM) &&
 892              !(env->CP0_Status & (1 << CP0St_SX))) ||
 893             (((env->hflags & MIPS_HFLAG_KSU) == MIPS_HFLAG_KM) &&
 894              !(env->CP0_Status & (1 << CP0St_KX)))) {
 895             env->hflags |= MIPS_HFLAG_AWRAP;
 896         }
 897     }
 898 #endif
 899     if (((env->CP0_Status & (1 << CP0St_CU0)) &&
 900          !(env->insn_flags & ISA_MIPS32R6)) ||
 901         !(env->hflags & MIPS_HFLAG_KSU)) {
 902         env->hflags |= MIPS_HFLAG_CP0;
 903     }
 904     if (env->CP0_Status & (1 << CP0St_CU1)) {
 905         env->hflags |= MIPS_HFLAG_FPU;
 906     }
 907     if (env->CP0_Status & (1 << CP0St_FR)) {
 908         env->hflags |= MIPS_HFLAG_F64;
 909     }
 910     if (((env->hflags & MIPS_HFLAG_KSU) != MIPS_HFLAG_KM) &&
 911         (env->CP0_Config5 & (1 << CP0C5_SBRI))) {
 912         env->hflags |= MIPS_HFLAG_SBRI;
 913     }
 914     if (env->insn_flags & ASE_DSPR2) {
 915         /* Enables access MIPS DSP resources, now our cpu is DSP ASER2,
 916            so enable to access DSPR2 resources. */
 917         if (env->CP0_Status & (1 << CP0St_MX)) {
 918             env->hflags |= MIPS_HFLAG_DSP | MIPS_HFLAG_DSPR2;
 919         }
 920
 921     } else if (env->insn_flags & ASE_DSP) {
 922         /* Enables access MIPS DSP resources, now our cpu is DSP ASE,
 923            so enable to access DSP resources. */
 924         if (env->CP0_Status & (1 << CP0St_MX)) {
 925             env->hflags |= MIPS_HFLAG_DSP;
 926         }
 927
 928     }
 929     if (env->insn_flags & ISA_MIPS32R2) {
 930         if (env->active_fpu.fcr0 & (1 << FCR0_F64)) {
 931             env->hflags |= MIPS_HFLAG_COP1X;
 932         }
 933     } else if (env->insn_flags & ISA_MIPS32) {
 934         if (env->hflags & MIPS_HFLAG_64) {
 935             env->hflags |= MIPS_HFLAG_COP1X;
 936         }
 937     } else if (env->insn_flags & ISA_MIPS4) {
 938         /* All supported MIPS IV CPUs use the XX (CU3) to enable
 939            and disable the MIPS IV extensions to the MIPS III ISA.
 940            Some other MIPS IV CPUs ignore the bit, so the check here
 941            would be too restrictive for them.  */
 942         if (env->CP0_Status & (1U << CP0St_CU3)) {
 943             env->hflags |= MIPS_HFLAG_COP1X;
 944         }
 945     }
 946     if (env->insn_flags & ASE_MSA) {
 947         if (env->CP0_Config5 & (1 << CP0C5_MSAEn)) {
 948             env->hflags |= MIPS_HFLAG_MSA;
 949         }
 950     }
 951     if (env->active_fpu.fcr0 & (1 << FCR0_FREP)) {
 952         if (env->CP0_Config5 & (1 << CP0C5_FRE)) {
 953             env->hflags |= MIPS_HFLAG_FRE;
 954         }
 955     }
 956     if (env->CP0_Config3 & (1 << CP0C3_LPA)) {
 957         if (env->CP0_PageGrain & (1 << CP0PG_ELPA)) {
 958             env->hflags |= MIPS_HFLAG_ELPA;
 959         }
 960     }
 961 }
 962
 963 #ifndef CONFIG_USER_ONLY
 964 static inline void cpu_mips_tlb_flush(CPUMIPSState *env, int flush_global)
 965 {
 966     MIPSCPU *cpu = mips_env_get_cpu(env);
 967
 968     /* Flush qemu's TLB and discard all shadowed entries.  */
 969     tlb_flush(CPU(cpu), flush_global);
 970     env->tlb->tlb_in_use = env->tlb->nb_tlb;
 971 }
 972
 973 /* Called for updates to CP0_Status.  */
 974 static inline void sync_c0_status(CPUMIPSState *env, CPUMIPSState *cpu, int tc)
 975 {
 976     int32_t tcstatus, *tcst;
 977     uint32_t v = cpu->CP0_Status;
 978     uint32_t cu, mx, asid, ksu;
 979     uint32_t mask = ((1 << CP0TCSt_TCU3)
 980                        | (1 << CP0TCSt_TCU2)
 981                        | (1 << CP0TCSt_TCU1)
 982                        | (1 << CP0TCSt_TCU0)
 983                        | (1 << CP0TCSt_TMX)
 984                        | (3 << CP0TCSt_TKSU)
 985                        | (0xff << CP0TCSt_TASID));
 986
 987     cu = (v >> CP0St_CU0) & 0xf;
 988     mx = (v >> CP0St_MX) & 0x1;
 989     ksu = (v >> CP0St_KSU) & 0x3;
 990     asid = env->CP0_EntryHi & 0xff;
 991
 992     tcstatus = cu << CP0TCSt_TCU0;
 993     tcstatus |= mx << CP0TCSt_TMX;
 994     tcstatus |= ksu << CP0TCSt_TKSU;
 995     tcstatus |= asid;
 996
 997     if (tc == cpu->current_tc) {
 998         tcst = &cpu->active_tc.CP0_TCStatus;
 999     } else {
1000         tcst = &cpu->tcs[tc].CP0_TCStatus;
1001     }
1002
1003     *tcst &= ~mask;
1004     *tcst |= tcstatus;
1005     compute_hflags(cpu);
1006 }
1007
1008 static inline void cpu_mips_store_status(CPUMIPSState *env, target_ulong val)
1009 {
1010     uint32_t mask = env->CP0_Status_rw_bitmask;
1011     target_ulong old = env->CP0_Status;
1012
1013     if (env->insn_flags & ISA_MIPS32R6) {
1014         bool has_supervisor = extract32(mask, CP0St_KSU, 2) == 0x3;
1015 #if defined(TARGET_MIPS64)
1016         uint32_t ksux = (1 << CP0St_KX) & val;
1017         ksux |= (ksux >> 1) & val; /* KX = 0 forces SX to be 0 */
1018         ksux |= (ksux >> 1) & val; /* SX = 0 forces UX to be 0 */
1019         val = (val & ~(7 << CP0St_UX)) | ksux;
1020 #endif
1021         if (has_supervisor && extract32(val, CP0St_KSU, 2) == 0x3) {
1022             mask &= ~(3 << CP0St_KSU);
1023         }
1024         mask &= ~(((1 << CP0St_SR) | (1 << CP0St_NMI)) & val);
1025     }
1026
1027     env->CP0_Status = (old & ~mask) | (val & mask);
1028 #if defined(TARGET_MIPS64)
1029     if ((env->CP0_Status ^ old) & (old & (7 << CP0St_UX))) {
1030         /* Access to at least one of the 64-bit segments has been disabled */
1031         cpu_mips_tlb_flush(env, 1);
1032     }
1033 #endif
1034     if (env->CP0_Config3 & (1 << CP0C3_MT)) {
1035         sync_c0_status(env, env, env->current_tc);
1036     } else {
1037         compute_hflags(env);
1038     }
1039 }
1040
1041 static inline void cpu_mips_store_cause(CPUMIPSState *env, target_ulong val)
1042 {
1043     uint32_t mask = 0x00C00300;
1044     uint32_t old = env->CP0_Cause;
1045     int i;
1046
1047     if (env->insn_flags & ISA_MIPS32R2) {
1048         mask |= 1 << CP0Ca_DC;
1049     }
1050     if (env->insn_flags & ISA_MIPS32R6) {
1051         mask &= ~((1 << CP0Ca_WP) & val);
1052     }
1053
1054     env->CP0_Cause = (env->CP0_Cause & ~mask) | (val & mask);
1055
1056     if ((old ^ env->CP0_Cause) & (1 << CP0Ca_DC)) {
1057         if (env->CP0_Cause & (1 << CP0Ca_DC)) {
1058             cpu_mips_stop_count(env);
1059         } else {
1060             cpu_mips_start_count(env);
1061         }
1062     }
1063
1064     /* Set/reset software interrupts */
1065     for (i = 0 ; i < 2 ; i++) {
1066         if ((old ^ env->CP0_Cause) & (1 << (CP0Ca_IP + i))) {
1067             cpu_mips_soft_irq(env, i, env->CP0_Cause & (1 << (CP0Ca_IP + i)));
1068         }
1069     }
1070 }
1071 #endif
1072
1073 static inline void QEMU_NORETURN do_raise_exception_err(CPUMIPSState *env,
1074                                                         uint32_t exception,
1075                                                         int error_code,
1076                                                         uintptr_t pc)
1077 {
1078     CPUState *cs = CPU(mips_env_get_cpu(env));
1079
1080     if (exception < EXCP_SC) {
1081         qemu_log_mask(CPU_LOG_INT, "%s: %d %d\n",
1082                       __func__, exception, error_code);
1083     }
1084     cs->exception_index = exception;
1085     env->error_code = error_code;
1086
1087     cpu_loop_exit_restore(cs, pc);
1088 }
1089
1090 static inline void QEMU_NORETURN do_raise_exception(CPUMIPSState *env,
1091                                                     uint32_t exception,
1092                                                     uintptr_t pc)
1093 {
1094     do_raise_exception_err(env, exception, 0, pc);
1095 }
1096
1097 #endif /* !defined (__MIPS_CPU_H__) */