LXR qemu/target/sh4/cpu.h

   1/*
   2 *  SH4 emulation
   3 *
   4 *  Copyright (c) 2005 Samuel Tardieu
   5 *
   6 * This library is free software; you can redistribute it and/or
   7 * modify it under the terms of the GNU Lesser General Public
   8 * License as published by the Free Software Foundation; either
   9 * version 2.1 of the License, or (at your option) any later version.
  10 *
  11 * This library is distributed in the hope that it will be useful,
  12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14 * Lesser General Public License for more details.
  15 *
  16 * You should have received a copy of the GNU Lesser General Public
  17 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
  18 */
  19
  20#ifndef SH4_CPU_H
  21#define SH4_CPU_H
  22
  23#include "cpu-qom.h"
  24#include "exec/cpu-defs.h"
  25
  26/* CPU Subtypes */
  27#define SH_CPU_SH7750  (1 << 0)
  28#define SH_CPU_SH7750S (1 << 1)
  29#define SH_CPU_SH7750R (1 << 2)
  30#define SH_CPU_SH7751  (1 << 3)
  31#define SH_CPU_SH7751R (1 << 4)
  32#define SH_CPU_SH7785  (1 << 5)
  33#define SH_CPU_SH7750_ALL (SH_CPU_SH7750 | SH_CPU_SH7750S | SH_CPU_SH7750R)
  34#define SH_CPU_SH7751_ALL (SH_CPU_SH7751 | SH_CPU_SH7751R)
  35
  36#define SR_MD 30
  37#define SR_RB 29
  38#define SR_BL 28
  39#define SR_FD 15
  40#define SR_M  9
  41#define SR_Q  8
  42#define SR_I3 7
  43#define SR_I2 6
  44#define SR_I1 5
  45#define SR_I0 4
  46#define SR_S  1
  47#define SR_T  0
  48
  49#define FPSCR_MASK             (0x003fffff)
  50#define FPSCR_FR               (1 << 21)
  51#define FPSCR_SZ               (1 << 20)
  52#define FPSCR_PR               (1 << 19)
  53#define FPSCR_DN               (1 << 18)
  54#define FPSCR_CAUSE_MASK       (0x3f << 12)
  55#define FPSCR_CAUSE_SHIFT      (12)
  56#define FPSCR_CAUSE_E          (1 << 17)
  57#define FPSCR_CAUSE_V          (1 << 16)
  58#define FPSCR_CAUSE_Z          (1 << 15)
  59#define FPSCR_CAUSE_O          (1 << 14)
  60#define FPSCR_CAUSE_U          (1 << 13)
  61#define FPSCR_CAUSE_I          (1 << 12)
  62#define FPSCR_ENABLE_MASK      (0x1f << 7)
  63#define FPSCR_ENABLE_SHIFT     (7)
  64#define FPSCR_ENABLE_V         (1 << 11)
  65#define FPSCR_ENABLE_Z         (1 << 10)
  66#define FPSCR_ENABLE_O         (1 << 9)
  67#define FPSCR_ENABLE_U         (1 << 8)
  68#define FPSCR_ENABLE_I         (1 << 7)
  69#define FPSCR_FLAG_MASK        (0x1f << 2)
  70#define FPSCR_FLAG_SHIFT       (2)
  71#define FPSCR_FLAG_V           (1 << 6)
  72#define FPSCR_FLAG_Z           (1 << 5)
  73#define FPSCR_FLAG_O           (1 << 4)
  74#define FPSCR_FLAG_U           (1 << 3)
  75#define FPSCR_FLAG_I           (1 << 2)
  76#define FPSCR_RM_MASK          (0x03 << 0)
  77#define FPSCR_RM_NEAREST       (0 << 0)
  78#define FPSCR_RM_ZERO          (1 << 0)
  79
  80#define DELAY_SLOT_MASK        0x7
  81#define DELAY_SLOT             (1 << 0)
  82#define DELAY_SLOT_CONDITIONAL (1 << 1)
  83#define DELAY_SLOT_RTE         (1 << 2)
  84
  85#define TB_FLAG_PENDING_MOVCA  (1 << 3)
  86
  87#define GUSA_SHIFT             4
  88#ifdef CONFIG_USER_ONLY
  89#define GUSA_EXCLUSIVE         (1 << 12)
  90#define GUSA_MASK              ((0xff << GUSA_SHIFT) | GUSA_EXCLUSIVE)
  91#else
  92/* Provide dummy versions of the above to allow tests against tbflags
  93   to be elided while avoiding ifdefs.  */
  94#define GUSA_EXCLUSIVE         0
  95#define GUSA_MASK              0
  96#endif
  97
  98#define TB_FLAG_ENVFLAGS_MASK  (DELAY_SLOT_MASK | GUSA_MASK)
  99
 100typedef struct tlb_t {
 101    uint32_t vpn;               /* virtual page number */
 102    uint32_t ppn;               /* physical page number */
 103    uint32_t size;              /* mapped page size in bytes */
 104    uint8_t asid;               /* address space identifier */
 105    uint8_t v:1;                /* validity */
 106    uint8_t sz:2;               /* page size */
 107    uint8_t sh:1;               /* share status */
 108    uint8_t c:1;                /* cacheability */
 109    uint8_t pr:2;               /* protection key */
 110    uint8_t d:1;                /* dirty */
 111    uint8_t wt:1;               /* write through */
 112    uint8_t sa:3;               /* space attribute (PCMCIA) */
 113    uint8_t tc:1;               /* timing control */
 114} tlb_t;
 115
 116#define UTLB_SIZE 64
 117#define ITLB_SIZE 4
 118
 119#define TARGET_INSN_START_EXTRA_WORDS 1
 120
 121enum sh_features {
 122    SH_FEATURE_SH4A = 1,
 123    SH_FEATURE_BCR3_AND_BCR4 = 2,
 124};
 125
 126typedef struct memory_content {
 127    uint32_t address;
 128    uint32_t value;
 129    struct memory_content *next;
 130} memory_content;
 131
 132typedef struct CPUSH4State {
 133    uint32_t flags;             /* general execution flags */
 134    uint32_t gregs[24];         /* general registers */
 135    float32 fregs[32];          /* floating point registers */
 136    uint32_t sr;                /* status register (with T split out) */
 137    uint32_t sr_m;              /* M bit of status register */
 138    uint32_t sr_q;              /* Q bit of status register */
 139    uint32_t sr_t;              /* T bit of status register */
 140    uint32_t ssr;               /* saved status register */
 141    uint32_t spc;               /* saved program counter */
 142    uint32_t gbr;               /* global base register */
 143    uint32_t vbr;               /* vector base register */
 144    uint32_t sgr;               /* saved global register 15 */
 145    uint32_t dbr;               /* debug base register */
 146    uint32_t pc;                /* program counter */
 147    uint32_t delayed_pc;        /* target of delayed branch */
 148    uint32_t delayed_cond;      /* condition of delayed branch */
 149    uint32_t mach;              /* multiply and accumulate high */
 150    uint32_t macl;              /* multiply and accumulate low */
 151    uint32_t pr;                /* procedure register */
 152    uint32_t fpscr;             /* floating point status/control register */
 153    uint32_t fpul;              /* floating point communication register */
 154
 155    /* float point status register */
 156    float_status fp_status;
 157
 158    /* Those belong to the specific unit (SH7750) but are handled here */
 159    uint32_t mmucr;             /* MMU control register */
 160    uint32_t pteh;              /* page table entry high register */
 161    uint32_t ptel;              /* page table entry low register */
 162    uint32_t ptea;              /* page table entry assistance register */
 163    uint32_t ttb;               /* translation table base register */
 164    uint32_t tea;               /* TLB exception address register */
 165    uint32_t tra;               /* TRAPA exception register */
 166    uint32_t expevt;            /* exception event register */
 167    uint32_t intevt;            /* interrupt event register */
 168
 169    tlb_t itlb[ITLB_SIZE];      /* instruction translation table */
 170    tlb_t utlb[UTLB_SIZE];      /* unified translation table */
 171
 172    /* LDST = LOCK_ADDR != -1.  */
 173    uint32_t lock_addr;
 174    uint32_t lock_value;
 175
 176    /* Fields up to this point are cleared by a CPU reset */
 177    struct {} end_reset_fields;
 178
 179    /* Fields from here on are preserved over CPU reset. */
 180    int id;                     /* CPU model */
 181
 182    /* The features that we should emulate. See sh_features above.  */
 183    uint32_t features;
 184
 185    void *intc_handle;
 186    int in_sleep;               /* SR_BL ignored during sleep */
 187    memory_content *movcal_backup;
 188    memory_content **movcal_backup_tail;
 189} CPUSH4State;
 190
 191/**
 192 * SuperHCPU:
 193 * @env: #CPUSH4State
 194 *
 195 * A SuperH CPU.
 196 */
 197struct SuperHCPU {
 198    /*< private >*/
 199    CPUState parent_obj;
 200    /*< public >*/
 201
 202    CPUNegativeOffsetState neg;
 203    CPUSH4State env;
 204};
 205
 206
 207void superh_cpu_do_interrupt(CPUState *cpu);
 208bool superh_cpu_exec_interrupt(CPUState *cpu, int int_req);
 209void superh_cpu_dump_state(CPUState *cpu, FILE *f, int flags);
 210hwaddr superh_cpu_get_phys_page_debug(CPUState *cpu, vaddr addr);
 211int superh_cpu_gdb_read_register(CPUState *cpu, GByteArray *buf, int reg);
 212int superh_cpu_gdb_write_register(CPUState *cpu, uint8_t *buf, int reg);
 213void superh_cpu_do_unaligned_access(CPUState *cpu, vaddr addr,
 214                                    MMUAccessType access_type,
 215                                    int mmu_idx, uintptr_t retaddr);
 216
 217void sh4_translate_init(void);
 218int cpu_sh4_signal_handler(int host_signum, void *pinfo,
 219                           void *puc);
 220bool superh_cpu_tlb_fill(CPUState *cs, vaddr address, int size,
 221                         MMUAccessType access_type, int mmu_idx,
 222                         bool probe, uintptr_t retaddr);
 223
 224void sh4_cpu_list(void);
 225#if !defined(CONFIG_USER_ONLY)
 226void cpu_sh4_invalidate_tlb(CPUSH4State *s);
 227uint32_t cpu_sh4_read_mmaped_itlb_addr(CPUSH4State *s,
 228                                       hwaddr addr);
 229void cpu_sh4_write_mmaped_itlb_addr(CPUSH4State *s, hwaddr addr,
 230                                    uint32_t mem_value);
 231uint32_t cpu_sh4_read_mmaped_itlb_data(CPUSH4State *s,
 232                                       hwaddr addr);
 233void cpu_sh4_write_mmaped_itlb_data(CPUSH4State *s, hwaddr addr,
 234                                    uint32_t mem_value);
 235uint32_t cpu_sh4_read_mmaped_utlb_addr(CPUSH4State *s,
 236                                       hwaddr addr);
 237void cpu_sh4_write_mmaped_utlb_addr(CPUSH4State *s, hwaddr addr,
 238                                    uint32_t mem_value);
 239uint32_t cpu_sh4_read_mmaped_utlb_data(CPUSH4State *s,
 240                                       hwaddr addr);
 241void cpu_sh4_write_mmaped_utlb_data(CPUSH4State *s, hwaddr addr,
 242                                    uint32_t mem_value);
 243#endif
 244
 245int cpu_sh4_is_cached(CPUSH4State * env, target_ulong addr);
 246
 247void cpu_load_tlb(CPUSH4State * env);
 248
 249#define SUPERH_CPU_TYPE_SUFFIX "-" TYPE_SUPERH_CPU
 250#define SUPERH_CPU_TYPE_NAME(model) model SUPERH_CPU_TYPE_SUFFIX
 251#define CPU_RESOLVING_TYPE TYPE_SUPERH_CPU
 252
 253#define cpu_signal_handler cpu_sh4_signal_handler
 254#define cpu_list sh4_cpu_list
 255
 256/* MMU modes definitions */
 257#define MMU_USER_IDX 1
 258static inline int cpu_mmu_index (CPUSH4State *env, bool ifetch)
 259{
 260    /* The instruction in a RTE delay slot is fetched in privileged
 261       mode, but executed in user mode.  */
 262    if (ifetch && (env->flags & DELAY_SLOT_RTE)) {
 263        return 0;
 264    } else {
 265        return (env->sr & (1u << SR_MD)) == 0 ? 1 : 0;
 266    }
 267}
 268
 269typedef CPUSH4State CPUArchState;
 270typedef SuperHCPU ArchCPU;
 271
 272#include "exec/cpu-all.h"
 273
 274/* MMU control register */
 275#define MMUCR    0x1F000010
 276#define MMUCR_AT (1<<0)
 277#define MMUCR_TI (1<<2)
 278#define MMUCR_SV (1<<8)
 279#define MMUCR_URC_BITS (6)
 280#define MMUCR_URC_OFFSET (10)
 281#define MMUCR_URC_SIZE (1 << MMUCR_URC_BITS)
 282#define MMUCR_URC_MASK (((MMUCR_URC_SIZE) - 1) << MMUCR_URC_OFFSET)
 283static inline int cpu_mmucr_urc (uint32_t mmucr)
 284{
 285    return ((mmucr & MMUCR_URC_MASK) >> MMUCR_URC_OFFSET);
 286}
 287
 288/* PTEH : Page Translation Entry High register */
 289#define PTEH_ASID_BITS (8)
 290#define PTEH_ASID_SIZE (1 << PTEH_ASID_BITS)
 291#define PTEH_ASID_MASK (PTEH_ASID_SIZE - 1)
 292#define cpu_pteh_asid(pteh) ((pteh) & PTEH_ASID_MASK)
 293#define PTEH_VPN_BITS (22)
 294#define PTEH_VPN_OFFSET (10)
 295#define PTEH_VPN_SIZE (1 << PTEH_VPN_BITS)
 296#define PTEH_VPN_MASK (((PTEH_VPN_SIZE) - 1) << PTEH_VPN_OFFSET)
 297static inline int cpu_pteh_vpn (uint32_t pteh)
 298{
 299    return ((pteh & PTEH_VPN_MASK) >> PTEH_VPN_OFFSET);
 300}
 301
 302/* PTEL : Page Translation Entry Low register */
 303#define PTEL_V        (1 << 8)
 304#define cpu_ptel_v(ptel) (((ptel) & PTEL_V) >> 8)
 305#define PTEL_C        (1 << 3)
 306#define cpu_ptel_c(ptel) (((ptel) & PTEL_C) >> 3)
 307#define PTEL_D        (1 << 2)
 308#define cpu_ptel_d(ptel) (((ptel) & PTEL_D) >> 2)
 309#define PTEL_SH       (1 << 1)
 310#define cpu_ptel_sh(ptel)(((ptel) & PTEL_SH) >> 1)
 311#define PTEL_WT       (1 << 0)
 312#define cpu_ptel_wt(ptel) ((ptel) & PTEL_WT)
 313
 314#define PTEL_SZ_HIGH_OFFSET  (7)
 315#define PTEL_SZ_HIGH  (1 << PTEL_SZ_HIGH_OFFSET)
 316#define PTEL_SZ_LOW_OFFSET   (4)
 317#define PTEL_SZ_LOW   (1 << PTEL_SZ_LOW_OFFSET)
 318static inline int cpu_ptel_sz (uint32_t ptel)
 319{
 320    int sz;
 321    sz = (ptel & PTEL_SZ_HIGH) >> PTEL_SZ_HIGH_OFFSET;
 322    sz <<= 1;
 323    sz |= (ptel & PTEL_SZ_LOW) >> PTEL_SZ_LOW_OFFSET;
 324    return sz;
 325}
 326
 327#define PTEL_PPN_BITS (19)
 328#define PTEL_PPN_OFFSET (10)
 329#define PTEL_PPN_SIZE (1 << PTEL_PPN_BITS)
 330#define PTEL_PPN_MASK (((PTEL_PPN_SIZE) - 1) << PTEL_PPN_OFFSET)
 331static inline int cpu_ptel_ppn (uint32_t ptel)
 332{
 333    return ((ptel & PTEL_PPN_MASK) >> PTEL_PPN_OFFSET);
 334}
 335
 336#define PTEL_PR_BITS   (2)
 337#define PTEL_PR_OFFSET (5)
 338#define PTEL_PR_SIZE (1 << PTEL_PR_BITS)
 339#define PTEL_PR_MASK (((PTEL_PR_SIZE) - 1) << PTEL_PR_OFFSET)
 340static inline int cpu_ptel_pr (uint32_t ptel)
 341{
 342    return ((ptel & PTEL_PR_MASK) >> PTEL_PR_OFFSET);
 343}
 344
 345/* PTEA : Page Translation Entry Assistance register */
 346#define PTEA_SA_BITS (3)
 347#define PTEA_SA_SIZE (1 << PTEA_SA_BITS)
 348#define PTEA_SA_MASK (PTEA_SA_SIZE - 1)
 349#define cpu_ptea_sa(ptea) ((ptea) & PTEA_SA_MASK)
 350#define PTEA_TC        (1 << 3)
 351#define cpu_ptea_tc(ptea) (((ptea) & PTEA_TC) >> 3)
 352
 353static inline target_ulong cpu_read_sr(CPUSH4State *env)
 354{
 355    return env->sr | (env->sr_m << SR_M) |
 356                     (env->sr_q << SR_Q) |
 357                     (env->sr_t << SR_T);
 358}
 359
 360static inline void cpu_write_sr(CPUSH4State *env, target_ulong sr)
 361{
 362    env->sr_m = (sr >> SR_M) & 1;
 363    env->sr_q = (sr >> SR_Q) & 1;
 364    env->sr_t = (sr >> SR_T) & 1;
 365    env->sr = sr & ~((1u << SR_M) | (1u << SR_Q) | (1u << SR_T));
 366}
 367
 368static inline void cpu_get_tb_cpu_state(CPUSH4State *env, target_ulong *pc,
 369                                        target_ulong *cs_base, uint32_t *flags)
 370{
 371    *pc = env->pc;
 372    /* For a gUSA region, notice the end of the region.  */
 373    *cs_base = env->flags & GUSA_MASK ? env->gregs[0] : 0;
 374    *flags = env->flags /* TB_FLAG_ENVFLAGS_MASK: bits 0-2, 4-12 */
 375            | (env->fpscr & (FPSCR_FR | FPSCR_SZ | FPSCR_PR))  /* Bits 19-21 */
 376            | (env->sr & ((1u << SR_MD) | (1u << SR_RB)))      /* Bits 29-30 */
 377            | (env->sr & (1u << SR_FD))                        /* Bit 15 */
 378            | (env->movcal_backup ? TB_FLAG_PENDING_MOVCA : 0); /* Bit 3 */
 379}
 380
 381#endif /* SH4_CPU_H */
 382