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 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 "qemu-common.h"
  24#include "cpu-qom.h"
  25
  26#define TARGET_LONG_BITS 32
  27#define ALIGNED_ONLY
  28
  29/* CPU Subtypes */
  30#define SH_CPU_SH7750  (1 << 0)
  31#define SH_CPU_SH7750S (1 << 1)
  32#define SH_CPU_SH7750R (1 << 2)
  33#define SH_CPU_SH7751  (1 << 3)
  34#define SH_CPU_SH7751R (1 << 4)
  35#define SH_CPU_SH7785  (1 << 5)
  36#define SH_CPU_SH7750_ALL (SH_CPU_SH7750 | SH_CPU_SH7750S | SH_CPU_SH7750R)
  37#define SH_CPU_SH7751_ALL (SH_CPU_SH7751 | SH_CPU_SH7751R)
  38
  39#define CPUArchState struct CPUSH4State
  40
  41#include "exec/cpu-defs.h"
  42
  43#include "fpu/softfloat.h"
  44
  45#define TARGET_PAGE_BITS 12     /* 4k XXXXX */
  46
  47#define TARGET_PHYS_ADDR_SPACE_BITS 32
  48#ifdef CONFIG_USER_ONLY
  49# define TARGET_VIRT_ADDR_SPACE_BITS 31
  50#else
  51# define TARGET_VIRT_ADDR_SPACE_BITS 32
  52#endif
  53
  54#define SR_MD 30
  55#define SR_RB 29
  56#define SR_BL 28
  57#define SR_FD 15
  58#define SR_M  9
  59#define SR_Q  8
  60#define SR_I3 7
  61#define SR_I2 6
  62#define SR_I1 5
  63#define SR_I0 4
  64#define SR_S  1
  65#define SR_T  0
  66
  67#define FPSCR_MASK             (0x003fffff)
  68#define FPSCR_FR               (1 << 21)
  69#define FPSCR_SZ               (1 << 20)
  70#define FPSCR_PR               (1 << 19)
  71#define FPSCR_DN               (1 << 18)
  72#define FPSCR_CAUSE_MASK       (0x3f << 12)
  73#define FPSCR_CAUSE_SHIFT      (12)
  74#define FPSCR_CAUSE_E          (1 << 17)
  75#define FPSCR_CAUSE_V          (1 << 16)
  76#define FPSCR_CAUSE_Z          (1 << 15)
  77#define FPSCR_CAUSE_O          (1 << 14)
  78#define FPSCR_CAUSE_U          (1 << 13)
  79#define FPSCR_CAUSE_I          (1 << 12)
  80#define FPSCR_ENABLE_MASK      (0x1f << 7)
  81#define FPSCR_ENABLE_SHIFT     (7)
  82#define FPSCR_ENABLE_V         (1 << 11)
  83#define FPSCR_ENABLE_Z         (1 << 10)
  84#define FPSCR_ENABLE_O         (1 << 9)
  85#define FPSCR_ENABLE_U         (1 << 8)
  86#define FPSCR_ENABLE_I         (1 << 7)
  87#define FPSCR_FLAG_MASK        (0x1f << 2)
  88#define FPSCR_FLAG_SHIFT       (2)
  89#define FPSCR_FLAG_V           (1 << 6)
  90#define FPSCR_FLAG_Z           (1 << 5)
  91#define FPSCR_FLAG_O           (1 << 4)
  92#define FPSCR_FLAG_U           (1 << 3)
  93#define FPSCR_FLAG_I           (1 << 2)
  94#define FPSCR_RM_MASK          (0x03 << 0)
  95#define FPSCR_RM_NEAREST       (0 << 0)
  96#define FPSCR_RM_ZERO          (1 << 0)
  97
  98#define DELAY_SLOT_MASK        0x7
  99#define DELAY_SLOT             (1 << 0)
 100#define DELAY_SLOT_CONDITIONAL (1 << 1)
 101#define DELAY_SLOT_RTE         (1 << 2)
 102
 103#define TB_FLAG_PENDING_MOVCA  (1 << 3)
 104
 105#define GUSA_SHIFT             4
 106#ifdef CONFIG_USER_ONLY
 107#define GUSA_EXCLUSIVE         (1 << 12)
 108#define GUSA_MASK              ((0xff << GUSA_SHIFT) | GUSA_EXCLUSIVE)
 109#else
 110/* Provide dummy versions of the above to allow tests against tbflags
 111   to be elided while avoiding ifdefs.  */
 112#define GUSA_EXCLUSIVE         0
 113#define GUSA_MASK              0
 114#endif
 115
 116#define TB_FLAG_ENVFLAGS_MASK  (DELAY_SLOT_MASK | GUSA_MASK)
 117
 118typedef struct tlb_t {
 119    uint32_t vpn;               /* virtual page number */
 120    uint32_t ppn;               /* physical page number */
 121    uint32_t size;              /* mapped page size in bytes */
 122    uint8_t asid;               /* address space identifier */
 123    uint8_t v:1;                /* validity */
 124    uint8_t sz:2;               /* page size */
 125    uint8_t sh:1;               /* share status */
 126    uint8_t c:1;                /* cacheability */
 127    uint8_t pr:2;               /* protection key */
 128    uint8_t d:1;                /* dirty */
 129    uint8_t wt:1;               /* write through */
 130    uint8_t sa:3;               /* space attribute (PCMCIA) */
 131    uint8_t tc:1;               /* timing control */
 132} tlb_t;
 133
 134#define UTLB_SIZE 64
 135#define ITLB_SIZE 4
 136
 137#define NB_MMU_MODES 2
 138#define TARGET_INSN_START_EXTRA_WORDS 1
 139
 140enum sh_features {
 141    SH_FEATURE_SH4A = 1,
 142    SH_FEATURE_BCR3_AND_BCR4 = 2,
 143};
 144
 145typedef struct memory_content {
 146    uint32_t address;
 147    uint32_t value;
 148    struct memory_content *next;
 149} memory_content;
 150
 151typedef struct CPUSH4State {
 152    uint32_t flags;             /* general execution flags */
 153    uint32_t gregs[24];         /* general registers */
 154    float32 fregs[32];          /* floating point registers */
 155    uint32_t sr;                /* status register (with T split out) */
 156    uint32_t sr_m;              /* M bit of status register */
 157    uint32_t sr_q;              /* Q bit of status register */
 158    uint32_t sr_t;              /* T bit of status register */
 159    uint32_t ssr;               /* saved status register */
 160    uint32_t spc;               /* saved program counter */
 161    uint32_t gbr;               /* global base register */
 162    uint32_t vbr;               /* vector base register */
 163    uint32_t sgr;               /* saved global register 15 */
 164    uint32_t dbr;               /* debug base register */
 165    uint32_t pc;                /* program counter */
 166    uint32_t delayed_pc;        /* target of delayed branch */
 167    uint32_t delayed_cond;      /* condition of delayed branch */
 168    uint32_t mach;              /* multiply and accumulate high */
 169    uint32_t macl;              /* multiply and accumulate low */
 170    uint32_t pr;                /* procedure register */
 171    uint32_t fpscr;             /* floating point status/control register */
 172    uint32_t fpul;              /* floating point communication register */
 173
 174    /* float point status register */
 175    float_status fp_status;
 176
 177    /* Those belong to the specific unit (SH7750) but are handled here */
 178    uint32_t mmucr;             /* MMU control register */
 179    uint32_t pteh;              /* page table entry high register */
 180    uint32_t ptel;              /* page table entry low register */
 181    uint32_t ptea;              /* page table entry assistance register */
 182    uint32_t ttb;               /* tranlation table base register */
 183    uint32_t tea;               /* TLB exception address register */
 184    uint32_t tra;               /* TRAPA exception register */
 185    uint32_t expevt;            /* exception event register */
 186    uint32_t intevt;            /* interrupt event register */
 187
 188    tlb_t itlb[ITLB_SIZE];      /* instruction translation table */
 189    tlb_t utlb[UTLB_SIZE];      /* unified translation table */
 190
 191    uint32_t ldst;
 192
 193    /* Fields up to this point are cleared by a CPU reset */
 194    struct {} end_reset_fields;
 195
 196    CPU_COMMON
 197
 198    /* Fields from here on are preserved over CPU reset. */
 199    int id;                     /* CPU model */
 200
 201    /* The features that we should emulate. See sh_features above.  */
 202    uint32_t features;
 203
 204    void *intc_handle;
 205    int in_sleep;               /* SR_BL ignored during sleep */
 206    memory_content *movcal_backup;
 207    memory_content **movcal_backup_tail;
 208} CPUSH4State;
 209
 210/**
 211 * SuperHCPU:
 212 * @env: #CPUSH4State
 213 *
 214 * A SuperH CPU.
 215 */
 216struct SuperHCPU {
 217    /*< private >*/
 218    CPUState parent_obj;
 219    /*< public >*/
 220
 221    CPUSH4State env;
 222};
 223
 224static inline SuperHCPU *sh_env_get_cpu(CPUSH4State *env)
 225{
 226    return container_of(env, SuperHCPU, env);
 227}
 228
 229#define ENV_GET_CPU(e) CPU(sh_env_get_cpu(e))
 230
 231#define ENV_OFFSET offsetof(SuperHCPU, env)
 232
 233void superh_cpu_do_interrupt(CPUState *cpu);
 234bool superh_cpu_exec_interrupt(CPUState *cpu, int int_req);
 235void superh_cpu_dump_state(CPUState *cpu, FILE *f,
 236                           fprintf_function cpu_fprintf, int flags);
 237hwaddr superh_cpu_get_phys_page_debug(CPUState *cpu, vaddr addr);
 238int superh_cpu_gdb_read_register(CPUState *cpu, uint8_t *buf, int reg);
 239int superh_cpu_gdb_write_register(CPUState *cpu, uint8_t *buf, int reg);
 240void superh_cpu_do_unaligned_access(CPUState *cpu, vaddr addr,
 241                                    MMUAccessType access_type,
 242                                    int mmu_idx, uintptr_t retaddr);
 243
 244void sh4_translate_init(void);
 245int cpu_sh4_signal_handler(int host_signum, void *pinfo,
 246                           void *puc);
 247int superh_cpu_handle_mmu_fault(CPUState *cpu, vaddr address, int rw,
 248                                int mmu_idx);
 249
 250void sh4_cpu_list(FILE *f, fprintf_function cpu_fprintf);
 251#if !defined(CONFIG_USER_ONLY)
 252void cpu_sh4_invalidate_tlb(CPUSH4State *s);
 253uint32_t cpu_sh4_read_mmaped_itlb_addr(CPUSH4State *s,
 254                                       hwaddr addr);
 255void cpu_sh4_write_mmaped_itlb_addr(CPUSH4State *s, hwaddr addr,
 256                                    uint32_t mem_value);
 257uint32_t cpu_sh4_read_mmaped_itlb_data(CPUSH4State *s,
 258                                       hwaddr addr);
 259void cpu_sh4_write_mmaped_itlb_data(CPUSH4State *s, hwaddr addr,
 260                                    uint32_t mem_value);
 261uint32_t cpu_sh4_read_mmaped_utlb_addr(CPUSH4State *s,
 262                                       hwaddr addr);
 263void cpu_sh4_write_mmaped_utlb_addr(CPUSH4State *s, hwaddr addr,
 264                                    uint32_t mem_value);
 265uint32_t cpu_sh4_read_mmaped_utlb_data(CPUSH4State *s,
 266                                       hwaddr addr);
 267void cpu_sh4_write_mmaped_utlb_data(CPUSH4State *s, hwaddr addr,
 268                                    uint32_t mem_value);
 269#endif
 270
 271int cpu_sh4_is_cached(CPUSH4State * env, target_ulong addr);
 272
 273void cpu_load_tlb(CPUSH4State * env);
 274
 275#define cpu_init(cpu_model) cpu_generic_init(TYPE_SUPERH_CPU, cpu_model)
 276
 277#define SUPERH_CPU_TYPE_SUFFIX "-" TYPE_SUPERH_CPU
 278#define SUPERH_CPU_TYPE_NAME(model) model SUPERH_CPU_TYPE_SUFFIX
 279
 280#define cpu_signal_handler cpu_sh4_signal_handler
 281#define cpu_list sh4_cpu_list
 282
 283/* MMU modes definitions */
 284#define MMU_MODE0_SUFFIX _kernel
 285#define MMU_MODE1_SUFFIX _user
 286#define MMU_USER_IDX 1
 287static inline int cpu_mmu_index (CPUSH4State *env, bool ifetch)
 288{
 289    /* The instruction in a RTE delay slot is fetched in privileged
 290       mode, but executed in user mode.  */
 291    if (ifetch && (env->flags & DELAY_SLOT_RTE)) {
 292        return 0;
 293    } else {
 294        return (env->sr & (1u << SR_MD)) == 0 ? 1 : 0;
 295    }
 296}
 297
 298#include "exec/cpu-all.h"
 299
 300/* Memory access type */
 301enum {
 302    /* Privilege */
 303    ACCESS_PRIV = 0x01,
 304    /* Direction */
 305    ACCESS_WRITE = 0x02,
 306    /* Type of instruction */
 307    ACCESS_CODE = 0x10,
 308    ACCESS_INT = 0x20
 309};
 310
 311/* MMU control register */
 312#define MMUCR    0x1F000010
 313#define MMUCR_AT (1<<0)
 314#define MMUCR_TI (1<<2)
 315#define MMUCR_SV (1<<8)
 316#define MMUCR_URC_BITS (6)
 317#define MMUCR_URC_OFFSET (10)
 318#define MMUCR_URC_SIZE (1 << MMUCR_URC_BITS)
 319#define MMUCR_URC_MASK (((MMUCR_URC_SIZE) - 1) << MMUCR_URC_OFFSET)
 320static inline int cpu_mmucr_urc (uint32_t mmucr)
 321{
 322    return ((mmucr & MMUCR_URC_MASK) >> MMUCR_URC_OFFSET);
 323}
 324
 325/* PTEH : Page Translation Entry High register */
 326#define PTEH_ASID_BITS (8)
 327#define PTEH_ASID_SIZE (1 << PTEH_ASID_BITS)
 328#define PTEH_ASID_MASK (PTEH_ASID_SIZE - 1)
 329#define cpu_pteh_asid(pteh) ((pteh) & PTEH_ASID_MASK)
 330#define PTEH_VPN_BITS (22)
 331#define PTEH_VPN_OFFSET (10)
 332#define PTEH_VPN_SIZE (1 << PTEH_VPN_BITS)
 333#define PTEH_VPN_MASK (((PTEH_VPN_SIZE) - 1) << PTEH_VPN_OFFSET)
 334static inline int cpu_pteh_vpn (uint32_t pteh)
 335{
 336    return ((pteh & PTEH_VPN_MASK) >> PTEH_VPN_OFFSET);
 337}
 338
 339/* PTEL : Page Translation Entry Low register */
 340#define PTEL_V        (1 << 8)
 341#define cpu_ptel_v(ptel) (((ptel) & PTEL_V) >> 8)
 342#define PTEL_C        (1 << 3)
 343#define cpu_ptel_c(ptel) (((ptel) & PTEL_C) >> 3)
 344#define PTEL_D        (1 << 2)
 345#define cpu_ptel_d(ptel) (((ptel) & PTEL_D) >> 2)
 346#define PTEL_SH       (1 << 1)
 347#define cpu_ptel_sh(ptel)(((ptel) & PTEL_SH) >> 1)
 348#define PTEL_WT       (1 << 0)
 349#define cpu_ptel_wt(ptel) ((ptel) & PTEL_WT)
 350
 351#define PTEL_SZ_HIGH_OFFSET  (7)
 352#define PTEL_SZ_HIGH  (1 << PTEL_SZ_HIGH_OFFSET)
 353#define PTEL_SZ_LOW_OFFSET   (4)
 354#define PTEL_SZ_LOW   (1 << PTEL_SZ_LOW_OFFSET)
 355static inline int cpu_ptel_sz (uint32_t ptel)
 356{
 357    int sz;
 358    sz = (ptel & PTEL_SZ_HIGH) >> PTEL_SZ_HIGH_OFFSET;
 359    sz <<= 1;
 360    sz |= (ptel & PTEL_SZ_LOW) >> PTEL_SZ_LOW_OFFSET;
 361    return sz;
 362}
 363
 364#define PTEL_PPN_BITS (19)
 365#define PTEL_PPN_OFFSET (10)
 366#define PTEL_PPN_SIZE (1 << PTEL_PPN_BITS)
 367#define PTEL_PPN_MASK (((PTEL_PPN_SIZE) - 1) << PTEL_PPN_OFFSET)
 368static inline int cpu_ptel_ppn (uint32_t ptel)
 369{
 370    return ((ptel & PTEL_PPN_MASK) >> PTEL_PPN_OFFSET);
 371}
 372
 373#define PTEL_PR_BITS   (2)
 374#define PTEL_PR_OFFSET (5)
 375#define PTEL_PR_SIZE (1 << PTEL_PR_BITS)
 376#define PTEL_PR_MASK (((PTEL_PR_SIZE) - 1) << PTEL_PR_OFFSET)
 377static inline int cpu_ptel_pr (uint32_t ptel)
 378{
 379    return ((ptel & PTEL_PR_MASK) >> PTEL_PR_OFFSET);
 380}
 381
 382/* PTEA : Page Translation Entry Assistance register */
 383#define PTEA_SA_BITS (3)
 384#define PTEA_SA_SIZE (1 << PTEA_SA_BITS)
 385#define PTEA_SA_MASK (PTEA_SA_SIZE - 1)
 386#define cpu_ptea_sa(ptea) ((ptea) & PTEA_SA_MASK)
 387#define PTEA_TC        (1 << 3)
 388#define cpu_ptea_tc(ptea) (((ptea) & PTEA_TC) >> 3)
 389
 390static inline target_ulong cpu_read_sr(CPUSH4State *env)
 391{
 392    return env->sr | (env->sr_m << SR_M) |
 393                     (env->sr_q << SR_Q) |
 394                     (env->sr_t << SR_T);
 395}
 396
 397static inline void cpu_write_sr(CPUSH4State *env, target_ulong sr)
 398{
 399    env->sr_m = (sr >> SR_M) & 1;
 400    env->sr_q = (sr >> SR_Q) & 1;
 401    env->sr_t = (sr >> SR_T) & 1;
 402    env->sr = sr & ~((1u << SR_M) | (1u << SR_Q) | (1u << SR_T));
 403}
 404
 405static inline void cpu_get_tb_cpu_state(CPUSH4State *env, target_ulong *pc,
 406                                        target_ulong *cs_base, uint32_t *flags)
 407{
 408    *pc = env->pc;
 409    /* For a gUSA region, notice the end of the region.  */
 410    *cs_base = env->flags & GUSA_MASK ? env->gregs[0] : 0;
 411    *flags = env->flags /* TB_FLAG_ENVFLAGS_MASK: bits 0-2, 4-12 */
 412            | (env->fpscr & (FPSCR_FR | FPSCR_SZ | FPSCR_PR))  /* Bits 19-21 */
 413            | (env->sr & ((1u << SR_MD) | (1u << SR_RB)))      /* Bits 29-30 */
 414            | (env->sr & (1u << SR_FD))                        /* Bit 15 */
 415            | (env->movcal_backup ? TB_FLAG_PENDING_MOVCA : 0); /* Bit 3 */
 416}
 417
 418#endif /* SH4_CPU_H */
 419