target-mips/cpu.h

   1 #if !defined (__MIPS_CPU_H__)
   2 #define __MIPS_CPU_H__
   3
   4 //#define DEBUG_OP
   5
   6 #define TARGET_HAS_ICE 1
   7
   8 #define ELF_MACHINE     EM_MIPS
   9
  10 #define CPUState struct CPUMIPSState
  11
  12 #include "config.h"
  13 #include "qemu-common.h"
  14 #include "mips-defs.h"
  15 #include "cpu-defs.h"
  16 #include "softfloat.h"
  17
  18 // uint_fast8_t and uint_fast16_t not in <sys/int_types.h>
  19 // XXX: move that elsewhere
  20 #if defined(CONFIG_SOLARIS) && CONFIG_SOLARIS_VERSION < 10
  21 typedef unsigned char           uint_fast8_t;
  22 typedef unsigned int            uint_fast16_t;
  23 #endif
  24
  25 struct CPUMIPSState;
  26
  27 typedef struct r4k_tlb_t r4k_tlb_t;
  28 struct r4k_tlb_t {
  29     target_ulong VPN;
  30     uint32_t PageMask;
  31     uint_fast8_t ASID;
  32     uint_fast16_t G:1;
  33     uint_fast16_t C0:3;
  34     uint_fast16_t C1:3;
  35     uint_fast16_t V0:1;
  36     uint_fast16_t V1:1;
  37     uint_fast16_t D0:1;
  38     uint_fast16_t D1:1;
  39     target_ulong PFN[2];
  40 };
  41
  42 #if !defined(CONFIG_USER_ONLY)
  43 typedef struct CPUMIPSTLBContext CPUMIPSTLBContext;
  44 struct CPUMIPSTLBContext {
  45     uint32_t nb_tlb;
  46     uint32_t tlb_in_use;
  47     int (*map_address) (struct CPUMIPSState *env, target_phys_addr_t *physical, int *prot, target_ulong address, int rw, int access_type);
  48     void (*helper_tlbwi) (void);
  49     void (*helper_tlbwr) (void);
  50     void (*helper_tlbp) (void);
  51     void (*helper_tlbr) (void);
  52     union {
  53         struct {
  54             r4k_tlb_t tlb[MIPS_TLB_MAX];
  55         } r4k;
  56     } mmu;
  57 };
  58 #endif
  59
  60 typedef union fpr_t fpr_t;
  61 union fpr_t {
  62     float64  fd;   /* ieee double precision */
  63     float32  fs[2];/* ieee single precision */
  64     uint64_t d;    /* binary double fixed-point */
  65     uint32_t w[2]; /* binary single fixed-point */
  66 };
  67 /* define FP_ENDIAN_IDX to access the same location
  68  * in the fpr_t union regardless of the host endianness
  69  */
  70 #if defined(HOST_WORDS_BIGENDIAN)
  71 #  define FP_ENDIAN_IDX 1
  72 #else
  73 #  define FP_ENDIAN_IDX 0
  74 #endif
  75
  76 typedef struct CPUMIPSFPUContext CPUMIPSFPUContext;
  77 struct CPUMIPSFPUContext {
  78     /* Floating point registers */
  79     fpr_t fpr[32];
  80     float_status fp_status;
  81     /* fpu implementation/revision register (fir) */
  82     uint32_t fcr0;
  83 #define FCR0_F64 22
  84 #define FCR0_L 21
  85 #define FCR0_W 20
  86 #define FCR0_3D 19
  87 #define FCR0_PS 18
  88 #define FCR0_D 17
  89 #define FCR0_S 16
  90 #define FCR0_PRID 8
  91 #define FCR0_REV 0
  92     /* fcsr */
  93     uint32_t fcr31;
  94 #define SET_FP_COND(num,env)     do { ((env).fcr31) |= ((num) ? (1 << ((num) + 24)) : (1 << 23)); } while(0)
  95 #define CLEAR_FP_COND(num,env)   do { ((env).fcr31) &= ~((num) ? (1 << ((num) + 24)) : (1 << 23)); } while(0)
  96 #define GET_FP_COND(env)         ((((env).fcr31 >> 24) & 0xfe) | (((env).fcr31 >> 23) & 0x1))
  97 #define GET_FP_CAUSE(reg)        (((reg) >> 12) & 0x3f)
  98 #define GET_FP_ENABLE(reg)       (((reg) >>  7) & 0x1f)
  99 #define GET_FP_FLAGS(reg)        (((reg) >>  2) & 0x1f)
 100 #define SET_FP_CAUSE(reg,v)      do { (reg) = ((reg) & ~(0x3f << 12)) | ((v & 0x3f) << 12); } while(0)
 101 #define SET_FP_ENABLE(reg,v)     do { (reg) = ((reg) & ~(0x1f <<  7)) | ((v & 0x1f) << 7); } while(0)
 102 #define SET_FP_FLAGS(reg,v)      do { (reg) = ((reg) & ~(0x1f <<  2)) | ((v & 0x1f) << 2); } while(0)
 103 #define UPDATE_FP_FLAGS(reg,v)   do { (reg) |= ((v & 0x1f) << 2); } while(0)
 104 #define FP_INEXACT        1
 105 #define FP_UNDERFLOW      2
 106 #define FP_OVERFLOW       4
 107 #define FP_DIV0           8
 108 #define FP_INVALID        16
 109 #define FP_UNIMPLEMENTED  32
 110 };
 111
 112 #define NB_MMU_MODES 3
 113
 114 typedef struct CPUMIPSMVPContext CPUMIPSMVPContext;
 115 struct CPUMIPSMVPContext {
 116     int32_t CP0_MVPControl;
 117 #define CP0MVPCo_CPA    3
 118 #define CP0MVPCo_STLB   2
 119 #define CP0MVPCo_VPC    1
 120 #define CP0MVPCo_EVP    0
 121     int32_t CP0_MVPConf0;
 122 #define CP0MVPC0_M      31
 123 #define CP0MVPC0_TLBS   29
 124 #define CP0MVPC0_GS     28
 125 #define CP0MVPC0_PCP    27
 126 #define CP0MVPC0_PTLBE  16
 127 #define CP0MVPC0_TCA    15
 128 #define CP0MVPC0_PVPE   10
 129 #define CP0MVPC0_PTC    0
 130     int32_t CP0_MVPConf1;
 131 #define CP0MVPC1_CIM    31
 132 #define CP0MVPC1_CIF    30
 133 #define CP0MVPC1_PCX    20
 134 #define CP0MVPC1_PCP2   10
 135 #define CP0MVPC1_PCP1   0
 136 };
 137
 138 typedef struct mips_def_t mips_def_t;
 139
 140 #define MIPS_SHADOW_SET_MAX 16
 141 #define MIPS_TC_MAX 5
 142 #define MIPS_FPU_MAX 1
 143 #define MIPS_DSP_ACC 4
 144
 145 typedef struct TCState TCState;
 146 struct TCState {
 147     target_ulong gpr[32];
 148     target_ulong PC;
 149     target_ulong HI[MIPS_DSP_ACC];
 150     target_ulong LO[MIPS_DSP_ACC];
 151     target_ulong ACX[MIPS_DSP_ACC];
 152     target_ulong DSPControl;
 153     int32_t CP0_TCStatus;
 154 #define CP0TCSt_TCU3    31
 155 #define CP0TCSt_TCU2    30
 156 #define CP0TCSt_TCU1    29
 157 #define CP0TCSt_TCU0    28
 158 #define CP0TCSt_TMX     27
 159 #define CP0TCSt_RNST    23
 160 #define CP0TCSt_TDS     21
 161 #define CP0TCSt_DT      20
 162 #define CP0TCSt_DA      15
 163 #define CP0TCSt_A       13
 164 #define CP0TCSt_TKSU    11
 165 #define CP0TCSt_IXMT    10
 166 #define CP0TCSt_TASID   0
 167     int32_t CP0_TCBind;
 168 #define CP0TCBd_CurTC   21
 169 #define CP0TCBd_TBE     17
 170 #define CP0TCBd_CurVPE  0
 171     target_ulong CP0_TCHalt;
 172     target_ulong CP0_TCContext;
 173     target_ulong CP0_TCSchedule;
 174     target_ulong CP0_TCScheFBack;
 175     int32_t CP0_Debug_tcstatus;
 176 };
 177
 178 typedef struct CPUMIPSState CPUMIPSState;
 179 struct CPUMIPSState {
 180     TCState active_tc;
 181     CPUMIPSFPUContext active_fpu;
 182
 183     uint32_t current_tc;
 184     uint32_t current_fpu;
 185
 186     uint32_t SEGBITS;
 187     uint32_t PABITS;
 188     target_ulong SEGMask;
 189     target_ulong PAMask;
 190
 191     int32_t CP0_Index;
 192     /* CP0_MVP* are per MVP registers. */
 193     int32_t CP0_Random;
 194     int32_t CP0_VPEControl;
 195 #define CP0VPECo_YSI    21
 196 #define CP0VPECo_GSI    20
 197 #define CP0VPECo_EXCPT  16
 198 #define CP0VPECo_TE     15
 199 #define CP0VPECo_TargTC 0
 200     int32_t CP0_VPEConf0;
 201 #define CP0VPEC0_M      31
 202 #define CP0VPEC0_XTC    21
 203 #define CP0VPEC0_TCS    19
 204 #define CP0VPEC0_SCS    18
 205 #define CP0VPEC0_DSC    17
 206 #define CP0VPEC0_ICS    16
 207 #define CP0VPEC0_MVP    1
 208 #define CP0VPEC0_VPA    0
 209     int32_t CP0_VPEConf1;
 210 #define CP0VPEC1_NCX    20
 211 #define CP0VPEC1_NCP2   10
 212 #define CP0VPEC1_NCP1   0
 213     target_ulong CP0_YQMask;
 214     target_ulong CP0_VPESchedule;
 215     target_ulong CP0_VPEScheFBack;
 216     int32_t CP0_VPEOpt;
 217 #define CP0VPEOpt_IWX7  15
 218 #define CP0VPEOpt_IWX6  14
 219 #define CP0VPEOpt_IWX5  13
 220 #define CP0VPEOpt_IWX4  12
 221 #define CP0VPEOpt_IWX3  11
 222 #define CP0VPEOpt_IWX2  10
 223 #define CP0VPEOpt_IWX1  9
 224 #define CP0VPEOpt_IWX0  8
 225 #define CP0VPEOpt_DWX7  7
 226 #define CP0VPEOpt_DWX6  6
 227 #define CP0VPEOpt_DWX5  5
 228 #define CP0VPEOpt_DWX4  4
 229 #define CP0VPEOpt_DWX3  3
 230 #define CP0VPEOpt_DWX2  2
 231 #define CP0VPEOpt_DWX1  1
 232 #define CP0VPEOpt_DWX0  0
 233     target_ulong CP0_EntryLo0;
 234     target_ulong CP0_EntryLo1;
 235     target_ulong CP0_Context;
 236     int32_t CP0_PageMask;
 237     int32_t CP0_PageGrain;
 238     int32_t CP0_Wired;
 239     int32_t CP0_SRSConf0_rw_bitmask;
 240     int32_t CP0_SRSConf0;
 241 #define CP0SRSC0_M      31
 242 #define CP0SRSC0_SRS3   20
 243 #define CP0SRSC0_SRS2   10
 244 #define CP0SRSC0_SRS1   0
 245     int32_t CP0_SRSConf1_rw_bitmask;
 246     int32_t CP0_SRSConf1;
 247 #define CP0SRSC1_M      31
 248 #define CP0SRSC1_SRS6   20
 249 #define CP0SRSC1_SRS5   10
 250 #define CP0SRSC1_SRS4   0
 251     int32_t CP0_SRSConf2_rw_bitmask;
 252     int32_t CP0_SRSConf2;
 253 #define CP0SRSC2_M      31
 254 #define CP0SRSC2_SRS9   20
 255 #define CP0SRSC2_SRS8   10
 256 #define CP0SRSC2_SRS7   0
 257     int32_t CP0_SRSConf3_rw_bitmask;
 258     int32_t CP0_SRSConf3;
 259 #define CP0SRSC3_M      31
 260 #define CP0SRSC3_SRS12  20
 261 #define CP0SRSC3_SRS11  10
 262 #define CP0SRSC3_SRS10  0
 263     int32_t CP0_SRSConf4_rw_bitmask;
 264     int32_t CP0_SRSConf4;
 265 #define CP0SRSC4_SRS15  20
 266 #define CP0SRSC4_SRS14  10
 267 #define CP0SRSC4_SRS13  0
 268     int32_t CP0_HWREna;
 269     target_ulong CP0_BadVAddr;
 270     int32_t CP0_Count;
 271     target_ulong CP0_EntryHi;
 272     int32_t CP0_Compare;
 273     int32_t CP0_Status;
 274 #define CP0St_CU3   31
 275 #define CP0St_CU2   30
 276 #define CP0St_CU1   29
 277 #define CP0St_CU0   28
 278 #define CP0St_RP    27
 279 #define CP0St_FR    26
 280 #define CP0St_RE    25
 281 #define CP0St_MX    24
 282 #define CP0St_PX    23
 283 #define CP0St_BEV   22
 284 #define CP0St_TS    21
 285 #define CP0St_SR    20
 286 #define CP0St_NMI   19
 287 #define CP0St_IM    8
 288 #define CP0St_KX    7
 289 #define CP0St_SX    6
 290 #define CP0St_UX    5
 291 #define CP0St_KSU   3
 292 #define CP0St_ERL   2
 293 #define CP0St_EXL   1
 294 #define CP0St_IE    0
 295     int32_t CP0_IntCtl;
 296 #define CP0IntCtl_IPTI 29
 297 #define CP0IntCtl_IPPC1 26
 298 #define CP0IntCtl_VS 5
 299     int32_t CP0_SRSCtl;
 300 #define CP0SRSCtl_HSS 26
 301 #define CP0SRSCtl_EICSS 18
 302 #define CP0SRSCtl_ESS 12
 303 #define CP0SRSCtl_PSS 6
 304 #define CP0SRSCtl_CSS 0
 305     int32_t CP0_SRSMap;
 306 #define CP0SRSMap_SSV7 28
 307 #define CP0SRSMap_SSV6 24
 308 #define CP0SRSMap_SSV5 20
 309 #define CP0SRSMap_SSV4 16
 310 #define CP0SRSMap_SSV3 12
 311 #define CP0SRSMap_SSV2 8
 312 #define CP0SRSMap_SSV1 4
 313 #define CP0SRSMap_SSV0 0
 314     int32_t CP0_Cause;
 315 #define CP0Ca_BD   31
 316 #define CP0Ca_TI   30
 317 #define CP0Ca_CE   28
 318 #define CP0Ca_DC   27
 319 #define CP0Ca_PCI  26
 320 #define CP0Ca_IV   23
 321 #define CP0Ca_WP   22
 322 #define CP0Ca_IP    8
 323 #define CP0Ca_IP_mask 0x0000FF00
 324 #define CP0Ca_EC    2
 325     target_ulong CP0_EPC;
 326     int32_t CP0_PRid;
 327     int32_t CP0_EBase;
 328     int32_t CP0_Config0;
 329 #define CP0C0_M    31
 330 #define CP0C0_K23  28
 331 #define CP0C0_KU   25
 332 #define CP0C0_MDU  20
 333 #define CP0C0_MM   17
 334 #define CP0C0_BM   16
 335 #define CP0C0_BE   15
 336 #define CP0C0_AT   13
 337 #define CP0C0_AR   10
 338 #define CP0C0_MT   7
 339 #define CP0C0_VI   3
 340 #define CP0C0_K0   0
 341     int32_t CP0_Config1;
 342 #define CP0C1_M    31
 343 #define CP0C1_MMU  25
 344 #define CP0C1_IS   22
 345 #define CP0C1_IL   19
 346 #define CP0C1_IA   16
 347 #define CP0C1_DS   13
 348 #define CP0C1_DL   10
 349 #define CP0C1_DA   7
 350 #define CP0C1_C2   6
 351 #define CP0C1_MD   5
 352 #define CP0C1_PC   4
 353 #define CP0C1_WR   3
 354 #define CP0C1_CA   2
 355 #define CP0C1_EP   1
 356 #define CP0C1_FP   0
 357     int32_t CP0_Config2;
 358 #define CP0C2_M    31
 359 #define CP0C2_TU   28
 360 #define CP0C2_TS   24
 361 #define CP0C2_TL   20
 362 #define CP0C2_TA   16
 363 #define CP0C2_SU   12
 364 #define CP0C2_SS   8
 365 #define CP0C2_SL   4
 366 #define CP0C2_SA   0
 367     int32_t CP0_Config3;
 368 #define CP0C3_M    31
 369 #define CP0C3_ISA_ON_EXC 16
 370 #define CP0C3_DSPP 10
 371 #define CP0C3_LPA  7
 372 #define CP0C3_VEIC 6
 373 #define CP0C3_VInt 5
 374 #define CP0C3_SP   4
 375 #define CP0C3_MT   2
 376 #define CP0C3_SM   1
 377 #define CP0C3_TL   0
 378     int32_t CP0_Config6;
 379     int32_t CP0_Config7;
 380     /* XXX: Maybe make LLAddr per-TC? */
 381     target_ulong lladdr;
 382     target_ulong llval;
 383     target_ulong llnewval;
 384     target_ulong llreg;
 385     target_ulong CP0_LLAddr_rw_bitmask;
 386     int CP0_LLAddr_shift;
 387     target_ulong CP0_WatchLo[8];
 388     int32_t CP0_WatchHi[8];
 389     target_ulong CP0_XContext;
 390     int32_t CP0_Framemask;
 391     int32_t CP0_Debug;
 392 #define CP0DB_DBD  31
 393 #define CP0DB_DM   30
 394 #define CP0DB_LSNM 28
 395 #define CP0DB_Doze 27
 396 #define CP0DB_Halt 26
 397 #define CP0DB_CNT  25
 398 #define CP0DB_IBEP 24
 399 #define CP0DB_DBEP 21
 400 #define CP0DB_IEXI 20
 401 #define CP0DB_VER  15
 402 #define CP0DB_DEC  10
 403 #define CP0DB_SSt  8
 404 #define CP0DB_DINT 5
 405 #define CP0DB_DIB  4
 406 #define CP0DB_DDBS 3
 407 #define CP0DB_DDBL 2
 408 #define CP0DB_DBp  1
 409 #define CP0DB_DSS  0
 410     target_ulong CP0_DEPC;
 411     int32_t CP0_Performance0;
 412     int32_t CP0_TagLo;
 413     int32_t CP0_DataLo;
 414     int32_t CP0_TagHi;
 415     int32_t CP0_DataHi;
 416     target_ulong CP0_ErrorEPC;
 417     int32_t CP0_DESAVE;
 418     /* We waste some space so we can handle shadow registers like TCs. */
 419     TCState tcs[MIPS_SHADOW_SET_MAX];
 420     CPUMIPSFPUContext fpus[MIPS_FPU_MAX];
 421     /* Qemu */
 422     int error_code;
 423     uint32_t hflags;    /* CPU State */
 424     /* TMASK defines different execution modes */
 425 #define MIPS_HFLAG_TMASK  0x007FF
 426 #define MIPS_HFLAG_MODE   0x00007 /* execution modes                    */
 427     /* The KSU flags must be the lowest bits in hflags. The flag order
 428        must be the same as defined for CP0 Status. This allows to use
 429        the bits as the value of mmu_idx. */
 430 #define MIPS_HFLAG_KSU    0x00003 /* kernel/supervisor/user mode mask   */
 431 #define MIPS_HFLAG_UM     0x00002 /* user mode flag                     */
 432 #define MIPS_HFLAG_SM     0x00001 /* supervisor mode flag               */
 433 #define MIPS_HFLAG_KM     0x00000 /* kernel mode flag                   */
 434 #define MIPS_HFLAG_DM     0x00004 /* Debug mode                         */
 435 #define MIPS_HFLAG_64     0x00008 /* 64-bit instructions enabled        */
 436 #define MIPS_HFLAG_CP0    0x00010 /* CP0 enabled                        */
 437 #define MIPS_HFLAG_FPU    0x00020 /* FPU enabled                        */
 438 #define MIPS_HFLAG_F64    0x00040 /* 64-bit FPU enabled                 */
 439     /* True if the MIPS IV COP1X instructions can be used.  This also
 440        controls the non-COP1X instructions RECIP.S, RECIP.D, RSQRT.S
 441        and RSQRT.D.  */
 442 #define MIPS_HFLAG_COP1X  0x00080 /* COP1X instructions enabled         */
 443 #define MIPS_HFLAG_RE     0x00100 /* Reversed endianness                */
 444 #define MIPS_HFLAG_UX     0x00200 /* 64-bit user mode                   */
 445 #define MIPS_HFLAG_M16    0x00400 /* MIPS16 mode flag                   */
 446 #define MIPS_HFLAG_M16_SHIFT 10
 447     /* If translation is interrupted between the branch instruction and
 448      * the delay slot, record what type of branch it is so that we can
 449      * resume translation properly.  It might be possible to reduce
 450      * this from three bits to two.  */
 451 #define MIPS_HFLAG_BMASK_BASE  0x03800
 452 #define MIPS_HFLAG_B      0x00800 /* Unconditional branch               */
 453 #define MIPS_HFLAG_BC     0x01000 /* Conditional branch                 */
 454 #define MIPS_HFLAG_BL     0x01800 /* Likely branch                      */
 455 #define MIPS_HFLAG_BR     0x02000 /* branch to register (can't link TB) */
 456     /* Extra flags about the current pending branch.  */
 457 #define MIPS_HFLAG_BMASK_EXT 0x3C000
 458 #define MIPS_HFLAG_B16    0x04000 /* branch instruction was 16 bits     */
 459 #define MIPS_HFLAG_BDS16  0x08000 /* branch requires 16-bit delay slot  */
 460 #define MIPS_HFLAG_BDS32  0x10000 /* branch requires 32-bit delay slot  */
 461 #define MIPS_HFLAG_BX     0x20000 /* branch exchanges execution mode    */
 462 #define MIPS_HFLAG_BMASK  (MIPS_HFLAG_BMASK_BASE | MIPS_HFLAG_BMASK_EXT)
 463     target_ulong btarget;        /* Jump / branch target               */
 464     target_ulong bcond;          /* Branch condition (if needed)       */
 465
 466     int SYNCI_Step; /* Address step size for SYNCI */
 467     int CCRes; /* Cycle count resolution/divisor */
 468     uint32_t CP0_Status_rw_bitmask; /* Read/write bits in CP0_Status */
 469     uint32_t CP0_TCStatus_rw_bitmask; /* Read/write bits in CP0_TCStatus */
 470     int insn_flags; /* Supported instruction set */
 471
 472     target_ulong tls_value; /* For usermode emulation */
 473
 474     CPU_COMMON
 475
 476     CPUMIPSMVPContext *mvp;
 477 #if !defined(CONFIG_USER_ONLY)
 478     CPUMIPSTLBContext *tlb;
 479 #endif
 480
 481     const mips_def_t *cpu_model;
 482     void *irq[8];
 483     struct QEMUTimer *timer; /* Internal timer */
 484 };
 485
 486 #if !defined(CONFIG_USER_ONLY)
 487 int no_mmu_map_address (CPUMIPSState *env, target_phys_addr_t *physical, int *prot,
 488                         target_ulong address, int rw, int access_type);
 489 int fixed_mmu_map_address (CPUMIPSState *env, target_phys_addr_t *physical, int *prot,
 490                            target_ulong address, int rw, int access_type);
 491 int r4k_map_address (CPUMIPSState *env, target_phys_addr_t *physical, int *prot,
 492                      target_ulong address, int rw, int access_type);
 493 void r4k_helper_tlbwi (void);
 494 void r4k_helper_tlbwr (void);
 495 void r4k_helper_tlbp (void);
 496 void r4k_helper_tlbr (void);
 497
 498 void cpu_unassigned_access(CPUState *env, target_phys_addr_t addr,
 499                            int is_write, int is_exec, int unused, int size);
 500 #endif
 501
 502 void mips_cpu_list (FILE *f, fprintf_function cpu_fprintf);
 503
 504 #define cpu_init cpu_mips_init
 505 #define cpu_exec cpu_mips_exec
 506 #define cpu_gen_code cpu_mips_gen_code
 507 #define cpu_signal_handler cpu_mips_signal_handler
 508 #define cpu_list mips_cpu_list
 509
 510 #define CPU_SAVE_VERSION 3
 511
 512 /* MMU modes definitions. We carefully match the indices with our
 513    hflags layout. */
 514 #define MMU_MODE0_SUFFIX _kernel
 515 #define MMU_MODE1_SUFFIX _super
 516 #define MMU_MODE2_SUFFIX _user
 517 #define MMU_USER_IDX 2
 518 static inline int cpu_mmu_index (CPUState *env)
 519 {
 520     return env->hflags & MIPS_HFLAG_KSU;
 521 }
 522
 523 static inline void cpu_clone_regs(CPUState *env, target_ulong newsp)
 524 {
 525     if (newsp)
 526         env->active_tc.gpr[29] = newsp;
 527     env->active_tc.gpr[7] = 0;
 528     env->active_tc.gpr[2] = 0;
 529 }
 530
 531 static inline int cpu_mips_hw_interrupts_pending(CPUState *env)
 532 {
 533     int32_t pending;
 534     int32_t status;
 535     int r;
 536
 537     if (!(env->CP0_Status & (1 << CP0St_IE)) ||
 538         (env->CP0_Status & (1 << CP0St_EXL)) ||
 539         (env->CP0_Status & (1 << CP0St_ERL)) ||
 540         /* Note that the TCStatus IXMT field is initialized to zero,
 541            and only MT capable cores can set it to one. So we don't
 542            need to check for MT capabilities here.  */
 543         (env->active_tc.CP0_TCStatus & (1 << CP0TCSt_IXMT)) ||
 544         (env->hflags & MIPS_HFLAG_DM)) {
 545         /* Interrupts are disabled */
 546         return 0;
 547     }
 548
 549     pending = env->CP0_Cause & CP0Ca_IP_mask;
 550     status = env->CP0_Status & CP0Ca_IP_mask;
 551
 552     if (env->CP0_Config3 & (1 << CP0C3_VEIC)) {
 553         /* A MIPS configured with a vectorizing external interrupt controller
 554            will feed a vector into the Cause pending lines. The core treats
 555            the status lines as a vector level, not as indiviual masks.  */
 556         r = pending > status;
 557     } else {
 558         /* A MIPS configured with compatibility or VInt (Vectored Interrupts)
 559            treats the pending lines as individual interrupt lines, the status
 560            lines are individual masks.  */
 561         r = pending & status;
 562     }
 563     return r;
 564 }
 565
 566 #include "cpu-all.h"
 567
 568 /* Memory access type :
 569  * may be needed for precise access rights control and precise exceptions.
 570  */
 571 enum {
 572     /* 1 bit to define user level / supervisor access */
 573     ACCESS_USER  = 0x00,
 574     ACCESS_SUPER = 0x01,
 575     /* 1 bit to indicate direction */
 576     ACCESS_STORE = 0x02,
 577     /* Type of instruction that generated the access */
 578     ACCESS_CODE  = 0x10, /* Code fetch access                */
 579     ACCESS_INT   = 0x20, /* Integer load/store access        */
 580     ACCESS_FLOAT = 0x30, /* floating point load/store access */
 581 };
 582
 583 /* Exceptions */
 584 enum {
 585     EXCP_NONE          = -1,
 586     EXCP_RESET         = 0,
 587     EXCP_SRESET,
 588     EXCP_DSS,
 589     EXCP_DINT,
 590     EXCP_DDBL,
 591     EXCP_DDBS,
 592     EXCP_NMI,
 593     EXCP_MCHECK,
 594     EXCP_EXT_INTERRUPT, /* 8 */
 595     EXCP_DFWATCH,
 596     EXCP_DIB,
 597     EXCP_IWATCH,
 598     EXCP_AdEL,
 599     EXCP_AdES,
 600     EXCP_TLBF,
 601     EXCP_IBE,
 602     EXCP_DBp, /* 16 */
 603     EXCP_SYSCALL,
 604     EXCP_BREAK,
 605     EXCP_CpU,
 606     EXCP_RI,
 607     EXCP_OVERFLOW,
 608     EXCP_TRAP,
 609     EXCP_FPE,
 610     EXCP_DWATCH, /* 24 */
 611     EXCP_LTLBL,
 612     EXCP_TLBL,
 613     EXCP_TLBS,
 614     EXCP_DBE,
 615     EXCP_THREAD,
 616     EXCP_MDMX,
 617     EXCP_C2E,
 618     EXCP_CACHE, /* 32 */
 619
 620     EXCP_LAST = EXCP_CACHE,
 621 };
 622 /* Dummy exception for conditional stores.  */
 623 #define EXCP_SC 0x100
 624
 625 /*
 626  * This is an interrnally generated WAKE request line.
 627  * It is driven by the CPU itself. Raised when the MT
 628  * block wants to wake a VPE from an inactive state and
 629  * cleared when VPE goes from active to inactive.
 630  */
 631 #define CPU_INTERRUPT_WAKE CPU_INTERRUPT_TGT_INT_0
 632
 633 int cpu_mips_exec(CPUMIPSState *s);
 634 CPUMIPSState *cpu_mips_init(const char *cpu_model);
 635 //~ uint32_t cpu_mips_get_clock (void);
 636 int cpu_mips_signal_handler(int host_signum, void *pinfo, void *puc);
 637
 638 /* mips_timer.c */
 639 uint32_t cpu_mips_get_random (CPUState *env);
 640 uint32_t cpu_mips_get_count (CPUState *env);
 641 void cpu_mips_store_count (CPUState *env, uint32_t value);
 642 void cpu_mips_store_compare (CPUState *env, uint32_t value);
 643 void cpu_mips_start_count(CPUState *env);
 644 void cpu_mips_stop_count(CPUState *env);
 645
 646 /* mips_int.c */
 647 void cpu_mips_soft_irq(CPUState *env, int irq, int level);
 648
 649 /* helper.c */
 650 int cpu_mips_handle_mmu_fault (CPUState *env, target_ulong address, int rw,
 651                                int mmu_idx);
 652 #define cpu_handle_mmu_fault cpu_mips_handle_mmu_fault
 653 void do_interrupt (CPUState *env);
 654 #if !defined(CONFIG_USER_ONLY)
 655 void r4k_invalidate_tlb (CPUState *env, int idx, int use_extra);
 656 target_phys_addr_t cpu_mips_translate_address (CPUState *env, target_ulong address,
 657                                                int rw);
 658 #endif
 659
 660 static inline void cpu_get_tb_cpu_state(CPUState *env, target_ulong *pc,
 661                                         target_ulong *cs_base, int *flags)
 662 {
 663     *pc = env->active_tc.PC;
 664     *cs_base = 0;
 665     *flags = env->hflags & (MIPS_HFLAG_TMASK | MIPS_HFLAG_BMASK);
 666 }
 667
 668 static inline void cpu_set_tls(CPUState *env, target_ulong newtls)
 669 {
 670     env->tls_value = newtls;
 671 }
 672
 673 static inline int mips_vpe_active(CPUState *env)
 674 {
 675     int active = 1;
 676
 677     /* Check that the VPE is enabled.  */
 678     if (!(env->mvp->CP0_MVPControl & (1 << CP0MVPCo_EVP))) {
 679         active = 0;
 680     }
 681     /* Check that the VPE is actived.  */
 682     if (!(env->CP0_VPEConf0 & (1 << CP0VPEC0_VPA))) {
 683         active = 0;
 684     }
 685
 686     /* Now verify that there are active thread contexts in the VPE.
 687
 688        This assumes the CPU model will internally reschedule threads
 689        if the active one goes to sleep. If there are no threads available
 690        the active one will be in a sleeping state, and we can turn off
 691        the entire VPE.  */
 692     if (!(env->active_tc.CP0_TCStatus & (1 << CP0TCSt_A))) {
 693         /* TC is not activated.  */
 694         active = 0;
 695     }
 696     if (env->active_tc.CP0_TCHalt & 1) {
 697         /* TC is in halt state.  */
 698         active = 0;
 699     }
 700
 701     return active;
 702 }
 703
 704 static inline int cpu_has_work(CPUState *env)
 705 {
 706     int has_work = 0;
 707
 708     /* It is implementation dependent if non-enabled interrupts
 709        wake-up the CPU, however most of the implementations only
 710        check for interrupts that can be taken. */
 711     if ((env->interrupt_request & CPU_INTERRUPT_HARD) &&
 712         cpu_mips_hw_interrupts_pending(env)) {
 713         has_work = 1;
 714     }
 715
 716     /* MIPS-MT has the ability to halt the CPU.  */
 717     if (env->CP0_Config3 & (1 << CP0C3_MT)) {
 718         /* The QEMU model will issue an _WAKE request whenever the CPUs
 719            should be woken up.  */
 720         if (env->interrupt_request & CPU_INTERRUPT_WAKE) {
 721             has_work = 1;
 722         }
 723
 724         if (!mips_vpe_active(env)) {
 725             has_work = 0;
 726         }
 727     }
 728     return has_work;
 729 }
 730
 731 #include "exec-all.h"
 732
 733 static inline void cpu_pc_from_tb(CPUState *env, TranslationBlock *tb)
 734 {
 735     env->active_tc.PC = tb->pc;
 736     env->hflags &= ~MIPS_HFLAG_BMASK;
 737     env->hflags |= tb->flags & MIPS_HFLAG_BMASK;
 738 }
 739
 740 #endif /* !defined (__MIPS_CPU_H__) */