target/mips/internal.h

   1 /*
   2  * MIPS internal definitions and helpers
   3  *
   4  * This work is licensed under the terms of the GNU GPL, version 2 or later.
   5  * See the COPYING file in the top-level directory.
   6  */
   7
   8 #ifndef MIPS_INTERNAL_H
   9 #define MIPS_INTERNAL_H
  10
  11 #include "exec/memattrs.h"
  12 #ifdef CONFIG_TCG
  13 #include "tcg/tcg-internal.h"
  14 #endif
  15
  16 /*
  17  * MMU types, the first four entries have the same layout as the
  18  * CP0C0_MT field.
  19  */
  20 enum mips_mmu_types {
  21     MMU_TYPE_NONE       = 0,
  22     MMU_TYPE_R4000      = 1,    /* Standard TLB */
  23     MMU_TYPE_BAT        = 2,    /* Block Address Translation */
  24     MMU_TYPE_FMT        = 3,    /* Fixed Mapping */
  25     MMU_TYPE_DVF        = 4,    /* Dual VTLB and FTLB */
  26     MMU_TYPE_R3000,
  27     MMU_TYPE_R6000,
  28     MMU_TYPE_R8000
  29 };
  30
  31 struct mips_def_t {
  32     const char *name;
  33     int32_t CP0_PRid;
  34     int32_t CP0_Config0;
  35     int32_t CP0_Config1;
  36     int32_t CP0_Config2;
  37     int32_t CP0_Config3;
  38     int32_t CP0_Config4;
  39     int32_t CP0_Config4_rw_bitmask;
  40     int32_t CP0_Config5;
  41     int32_t CP0_Config5_rw_bitmask;
  42     int32_t CP0_Config6;
  43     int32_t CP0_Config6_rw_bitmask;
  44     int32_t CP0_Config7;
  45     int32_t CP0_Config7_rw_bitmask;
  46     target_ulong CP0_LLAddr_rw_bitmask;
  47     int CP0_LLAddr_shift;
  48     int32_t SYNCI_Step;
  49     int32_t CCRes;
  50     int32_t CP0_Status_rw_bitmask;
  51     int32_t CP0_TCStatus_rw_bitmask;
  52     int32_t CP0_SRSCtl;
  53     int32_t CP1_fcr0;
  54     int32_t CP1_fcr31_rw_bitmask;
  55     int32_t CP1_fcr31;
  56     int32_t MSAIR;
  57     int32_t SEGBITS;
  58     int32_t PABITS;
  59     int32_t CP0_SRSConf0_rw_bitmask;
  60     int32_t CP0_SRSConf0;
  61     int32_t CP0_SRSConf1_rw_bitmask;
  62     int32_t CP0_SRSConf1;
  63     int32_t CP0_SRSConf2_rw_bitmask;
  64     int32_t CP0_SRSConf2;
  65     int32_t CP0_SRSConf3_rw_bitmask;
  66     int32_t CP0_SRSConf3;
  67     int32_t CP0_SRSConf4_rw_bitmask;
  68     int32_t CP0_SRSConf4;
  69     int32_t CP0_PageGrain_rw_bitmask;
  70     int32_t CP0_PageGrain;
  71     target_ulong CP0_EBaseWG_rw_bitmask;
  72     uint64_t insn_flags;
  73     enum mips_mmu_types mmu_type;
  74     int32_t SAARP;
  75 };
  76
  77 extern const char regnames[32][4];
  78 extern const char fregnames[32][4];
  79
  80 extern const struct mips_def_t mips_defs[];
  81 extern const int mips_defs_number;
  82
  83 int mips_cpu_gdb_read_register(CPUState *cpu, GByteArray *buf, int reg);
  84 int mips_cpu_gdb_write_register(CPUState *cpu, uint8_t *buf, int reg);
  85
  86 #define USEG_LIMIT      ((target_ulong)(int32_t)0x7FFFFFFFUL)
  87 #define KSEG0_BASE      ((target_ulong)(int32_t)0x80000000UL)
  88 #define KSEG1_BASE      ((target_ulong)(int32_t)0xA0000000UL)
  89 #define KSEG2_BASE      ((target_ulong)(int32_t)0xC0000000UL)
  90 #define KSEG3_BASE      ((target_ulong)(int32_t)0xE0000000UL)
  91
  92 #define KVM_KSEG0_BASE  ((target_ulong)(int32_t)0x40000000UL)
  93 #define KVM_KSEG2_BASE  ((target_ulong)(int32_t)0x60000000UL)
  94
  95 #if !defined(CONFIG_USER_ONLY)
  96
  97 enum {
  98     TLBRET_XI = -6,
  99     TLBRET_RI = -5,
 100     TLBRET_DIRTY = -4,
 101     TLBRET_INVALID = -3,
 102     TLBRET_NOMATCH = -2,
 103     TLBRET_BADADDR = -1,
 104     TLBRET_MATCH = 0
 105 };
 106
 107 int get_physical_address(CPUMIPSState *env, hwaddr *physical,
 108                          int *prot, target_ulong real_address,
 109                          MMUAccessType access_type, int mmu_idx);
 110 hwaddr mips_cpu_get_phys_page_debug(CPUState *cpu, vaddr addr);
 111
 112 typedef struct r4k_tlb_t r4k_tlb_t;
 113 struct r4k_tlb_t {
 114     target_ulong VPN;
 115     uint32_t PageMask;
 116     uint16_t ASID;
 117     uint32_t MMID;
 118     unsigned int G:1;
 119     unsigned int C0:3;
 120     unsigned int C1:3;
 121     unsigned int V0:1;
 122     unsigned int V1:1;
 123     unsigned int D0:1;
 124     unsigned int D1:1;
 125     unsigned int XI0:1;
 126     unsigned int XI1:1;
 127     unsigned int RI0:1;
 128     unsigned int RI1:1;
 129     unsigned int EHINV:1;
 130     uint64_t PFN[2];
 131 };
 132
 133 struct CPUMIPSTLBContext {
 134     uint32_t nb_tlb;
 135     uint32_t tlb_in_use;
 136     int (*map_address)(struct CPUMIPSState *env, hwaddr *physical, int *prot,
 137                        target_ulong address, MMUAccessType access_type);
 138     void (*helper_tlbwi)(struct CPUMIPSState *env);
 139     void (*helper_tlbwr)(struct CPUMIPSState *env);
 140     void (*helper_tlbp)(struct CPUMIPSState *env);
 141     void (*helper_tlbr)(struct CPUMIPSState *env);
 142     void (*helper_tlbinv)(struct CPUMIPSState *env);
 143     void (*helper_tlbinvf)(struct CPUMIPSState *env);
 144     union {
 145         struct {
 146             r4k_tlb_t tlb[MIPS_TLB_MAX];
 147         } r4k;
 148     } mmu;
 149 };
 150
 151 void sync_c0_status(CPUMIPSState *env, CPUMIPSState *cpu, int tc);
 152 void cpu_mips_store_status(CPUMIPSState *env, target_ulong val);
 153 void cpu_mips_store_cause(CPUMIPSState *env, target_ulong val);
 154
 155 extern const VMStateDescription vmstate_mips_cpu;
 156
 157 #endif /* !CONFIG_USER_ONLY */
 158
 159 #define cpu_signal_handler cpu_mips_signal_handler
 160
 161 static inline bool cpu_mips_hw_interrupts_enabled(CPUMIPSState *env)
 162 {
 163     return (env->CP0_Status & (1 << CP0St_IE)) &&
 164         !(env->CP0_Status & (1 << CP0St_EXL)) &&
 165         !(env->CP0_Status & (1 << CP0St_ERL)) &&
 166         !(env->hflags & MIPS_HFLAG_DM) &&
 167         /*
 168          * Note that the TCStatus IXMT field is initialized to zero,
 169          * and only MT capable cores can set it to one. So we don't
 170          * need to check for MT capabilities here.
 171          */
 172         !(env->active_tc.CP0_TCStatus & (1 << CP0TCSt_IXMT));
 173 }
 174
 175 /* Check if there is pending and not masked out interrupt */
 176 static inline bool cpu_mips_hw_interrupts_pending(CPUMIPSState *env)
 177 {
 178     int32_t pending;
 179     int32_t status;
 180     bool r;
 181
 182     pending = env->CP0_Cause & CP0Ca_IP_mask;
 183     status = env->CP0_Status & CP0Ca_IP_mask;
 184
 185     if (env->CP0_Config3 & (1 << CP0C3_VEIC)) {
 186         /*
 187          * A MIPS configured with a vectorizing external interrupt controller
 188          * will feed a vector into the Cause pending lines. The core treats
 189          * the status lines as a vector level, not as individual masks.
 190          */
 191         r = pending > status;
 192     } else {
 193         /*
 194          * A MIPS configured with compatibility or VInt (Vectored Interrupts)
 195          * treats the pending lines as individual interrupt lines, the status
 196          * lines are individual masks.
 197          */
 198         r = (pending & status) != 0;
 199     }
 200     return r;
 201 }
 202
 203 void msa_reset(CPUMIPSState *env);
 204
 205 /* cp0_timer.c */
 206 uint32_t cpu_mips_get_count(CPUMIPSState *env);
 207 void cpu_mips_store_count(CPUMIPSState *env, uint32_t value);
 208 void cpu_mips_store_compare(CPUMIPSState *env, uint32_t value);
 209 void cpu_mips_start_count(CPUMIPSState *env);
 210 void cpu_mips_stop_count(CPUMIPSState *env);
 211
 212 static inline void mips_env_set_pc(CPUMIPSState *env, target_ulong value)
 213 {
 214     env->active_tc.PC = value & ~(target_ulong)1;
 215     if (value & 1) {
 216         env->hflags |= MIPS_HFLAG_M16;
 217     } else {
 218         env->hflags &= ~(MIPS_HFLAG_M16);
 219     }
 220 }
 221
 222 static inline void restore_pamask(CPUMIPSState *env)
 223 {
 224     if (env->hflags & MIPS_HFLAG_ELPA) {
 225         env->PAMask = (1ULL << env->PABITS) - 1;
 226     } else {
 227         env->PAMask = PAMASK_BASE;
 228     }
 229 }
 230
 231 static inline int mips_vpe_active(CPUMIPSState *env)
 232 {
 233     int active = 1;
 234
 235     /* Check that the VPE is enabled.  */
 236     if (!(env->mvp->CP0_MVPControl & (1 << CP0MVPCo_EVP))) {
 237         active = 0;
 238     }
 239     /* Check that the VPE is activated.  */
 240     if (!(env->CP0_VPEConf0 & (1 << CP0VPEC0_VPA))) {
 241         active = 0;
 242     }
 243
 244     /*
 245      * Now verify that there are active thread contexts in the VPE.
 246      *
 247      * This assumes the CPU model will internally reschedule threads
 248      * if the active one goes to sleep. If there are no threads available
 249      * the active one will be in a sleeping state, and we can turn off
 250      * the entire VPE.
 251      */
 252     if (!(env->active_tc.CP0_TCStatus & (1 << CP0TCSt_A))) {
 253         /* TC is not activated.  */
 254         active = 0;
 255     }
 256     if (env->active_tc.CP0_TCHalt & 1) {
 257         /* TC is in halt state.  */
 258         active = 0;
 259     }
 260
 261     return active;
 262 }
 263
 264 static inline int mips_vp_active(CPUMIPSState *env)
 265 {
 266     CPUState *other_cs = first_cpu;
 267
 268     /* Check if the VP disabled other VPs (which means the VP is enabled) */
 269     if ((env->CP0_VPControl >> CP0VPCtl_DIS) & 1) {
 270         return 1;
 271     }
 272
 273     /* Check if the virtual processor is disabled due to a DVP */
 274     CPU_FOREACH(other_cs) {
 275         MIPSCPU *other_cpu = MIPS_CPU(other_cs);
 276         if ((&other_cpu->env != env) &&
 277             ((other_cpu->env.CP0_VPControl >> CP0VPCtl_DIS) & 1)) {
 278             return 0;
 279         }
 280     }
 281     return 1;
 282 }
 283
 284 static inline void compute_hflags(CPUMIPSState *env)
 285 {
 286     env->hflags &= ~(MIPS_HFLAG_COP1X | MIPS_HFLAG_64 | MIPS_HFLAG_CP0 |
 287                      MIPS_HFLAG_F64 | MIPS_HFLAG_FPU | MIPS_HFLAG_KSU |
 288                      MIPS_HFLAG_AWRAP | MIPS_HFLAG_DSP | MIPS_HFLAG_DSP_R2 |
 289                      MIPS_HFLAG_DSP_R3 | MIPS_HFLAG_SBRI | MIPS_HFLAG_MSA |
 290                      MIPS_HFLAG_FRE | MIPS_HFLAG_ELPA | MIPS_HFLAG_ERL);
 291     if (env->CP0_Status & (1 << CP0St_ERL)) {
 292         env->hflags |= MIPS_HFLAG_ERL;
 293     }
 294     if (!(env->CP0_Status & (1 << CP0St_EXL)) &&
 295         !(env->CP0_Status & (1 << CP0St_ERL)) &&
 296         !(env->hflags & MIPS_HFLAG_DM)) {
 297         env->hflags |= (env->CP0_Status >> CP0St_KSU) &
 298                        MIPS_HFLAG_KSU;
 299     }
 300 #if defined(TARGET_MIPS64)
 301     if ((env->insn_flags & ISA_MIPS3) &&
 302         (((env->hflags & MIPS_HFLAG_KSU) != MIPS_HFLAG_UM) ||
 303          (env->CP0_Status & (1 << CP0St_PX)) ||
 304          (env->CP0_Status & (1 << CP0St_UX)))) {
 305         env->hflags |= MIPS_HFLAG_64;
 306     }
 307
 308     if (!(env->insn_flags & ISA_MIPS3)) {
 309         env->hflags |= MIPS_HFLAG_AWRAP;
 310     } else if (((env->hflags & MIPS_HFLAG_KSU) == MIPS_HFLAG_UM) &&
 311                !(env->CP0_Status & (1 << CP0St_UX))) {
 312         env->hflags |= MIPS_HFLAG_AWRAP;
 313     } else if (env->insn_flags & ISA_MIPS_R6) {
 314         /* Address wrapping for Supervisor and Kernel is specified in R6 */
 315         if ((((env->hflags & MIPS_HFLAG_KSU) == MIPS_HFLAG_SM) &&
 316              !(env->CP0_Status & (1 << CP0St_SX))) ||
 317             (((env->hflags & MIPS_HFLAG_KSU) == MIPS_HFLAG_KM) &&
 318              !(env->CP0_Status & (1 << CP0St_KX)))) {
 319             env->hflags |= MIPS_HFLAG_AWRAP;
 320         }
 321     }
 322 #endif
 323     if (((env->CP0_Status & (1 << CP0St_CU0)) &&
 324          !(env->insn_flags & ISA_MIPS_R6)) ||
 325         !(env->hflags & MIPS_HFLAG_KSU)) {
 326         env->hflags |= MIPS_HFLAG_CP0;
 327     }
 328     if (env->CP0_Status & (1 << CP0St_CU1)) {
 329         env->hflags |= MIPS_HFLAG_FPU;
 330     }
 331     if (env->CP0_Status & (1 << CP0St_FR)) {
 332         env->hflags |= MIPS_HFLAG_F64;
 333     }
 334     if (((env->hflags & MIPS_HFLAG_KSU) != MIPS_HFLAG_KM) &&
 335         (env->CP0_Config5 & (1 << CP0C5_SBRI))) {
 336         env->hflags |= MIPS_HFLAG_SBRI;
 337     }
 338     if (env->insn_flags & ASE_DSP_R3) {
 339         /*
 340          * Our cpu supports DSP R3 ASE, so enable
 341          * access to DSP R3 resources.
 342          */
 343         if (env->CP0_Status & (1 << CP0St_MX)) {
 344             env->hflags |= MIPS_HFLAG_DSP | MIPS_HFLAG_DSP_R2 |
 345                            MIPS_HFLAG_DSP_R3;
 346         }
 347     } else if (env->insn_flags & ASE_DSP_R2) {
 348         /*
 349          * Our cpu supports DSP R2 ASE, so enable
 350          * access to DSP R2 resources.
 351          */
 352         if (env->CP0_Status & (1 << CP0St_MX)) {
 353             env->hflags |= MIPS_HFLAG_DSP | MIPS_HFLAG_DSP_R2;
 354         }
 355
 356     } else if (env->insn_flags & ASE_DSP) {
 357         /*
 358          * Our cpu supports DSP ASE, so enable
 359          * access to DSP resources.
 360          */
 361         if (env->CP0_Status & (1 << CP0St_MX)) {
 362             env->hflags |= MIPS_HFLAG_DSP;
 363         }
 364
 365     }
 366     if (env->insn_flags & ISA_MIPS_R2) {
 367         if (env->active_fpu.fcr0 & (1 << FCR0_F64)) {
 368             env->hflags |= MIPS_HFLAG_COP1X;
 369         }
 370     } else if (env->insn_flags & ISA_MIPS_R1) {
 371         if (env->hflags & MIPS_HFLAG_64) {
 372             env->hflags |= MIPS_HFLAG_COP1X;
 373         }
 374     } else if (env->insn_flags & ISA_MIPS4) {
 375         /*
 376          * All supported MIPS IV CPUs use the XX (CU3) to enable
 377          * and disable the MIPS IV extensions to the MIPS III ISA.
 378          * Some other MIPS IV CPUs ignore the bit, so the check here
 379          * would be too restrictive for them.
 380          */
 381         if (env->CP0_Status & (1U << CP0St_CU3)) {
 382             env->hflags |= MIPS_HFLAG_COP1X;
 383         }
 384     }
 385     if (ase_msa_available(env)) {
 386         if (env->CP0_Config5 & (1 << CP0C5_MSAEn)) {
 387             env->hflags |= MIPS_HFLAG_MSA;
 388         }
 389     }
 390     if (env->active_fpu.fcr0 & (1 << FCR0_FREP)) {
 391         if (env->CP0_Config5 & (1 << CP0C5_FRE)) {
 392             env->hflags |= MIPS_HFLAG_FRE;
 393         }
 394     }
 395     if (env->CP0_Config3 & (1 << CP0C3_LPA)) {
 396         if (env->CP0_PageGrain & (1 << CP0PG_ELPA)) {
 397             env->hflags |= MIPS_HFLAG_ELPA;
 398         }
 399     }
 400 }
 401
 402 #endif