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 #ifndef _CPU_SH4_H
  20 #define _CPU_SH4_H
  21
  22 #include "config.h"
  23 #include "qemu-common.h"
  24
  25 #define TARGET_LONG_BITS 32
  26 #define TARGET_HAS_ICE 1
  27
  28 #define ELF_MACHINE     EM_SH
  29
  30 /* CPU Subtypes */
  31 #define SH_CPU_SH7750  (1 << 0)
  32 #define SH_CPU_SH7750S (1 << 1)
  33 #define SH_CPU_SH7750R (1 << 2)
  34 #define SH_CPU_SH7751  (1 << 3)
  35 #define SH_CPU_SH7751R (1 << 4)
  36 #define SH_CPU_SH7785  (1 << 5)
  37 #define SH_CPU_SH7750_ALL (SH_CPU_SH7750 | SH_CPU_SH7750S | SH_CPU_SH7750R)
  38 #define SH_CPU_SH7751_ALL (SH_CPU_SH7751 | SH_CPU_SH7751R)
  39
  40 #define CPUState struct CPUSH4State
  41
  42 #include "cpu-defs.h"
  43
  44 #include "softfloat.h"
  45
  46 #define TARGET_PAGE_BITS 12     /* 4k XXXXX */
  47
  48 #define TARGET_PHYS_ADDR_SPACE_BITS 32
  49 #define TARGET_VIRT_ADDR_SPACE_BITS 32
  50
  51 #define SR_MD (1 << 30)
  52 #define SR_RB (1 << 29)
  53 #define SR_BL (1 << 28)
  54 #define SR_FD (1 << 15)
  55 #define SR_M  (1 << 9)
  56 #define SR_Q  (1 << 8)
  57 #define SR_I3 (1 << 7)
  58 #define SR_I2 (1 << 6)
  59 #define SR_I1 (1 << 5)
  60 #define SR_I0 (1 << 4)
  61 #define SR_S  (1 << 1)
  62 #define SR_T  (1 << 0)
  63
  64 #define FPSCR_MASK             (0x003fffff)
  65 #define FPSCR_FR               (1 << 21)
  66 #define FPSCR_SZ               (1 << 20)
  67 #define FPSCR_PR               (1 << 19)
  68 #define FPSCR_DN               (1 << 18)
  69 #define FPSCR_CAUSE_MASK       (0x3f << 12)
  70 #define FPSCR_CAUSE_SHIFT      (12)
  71 #define FPSCR_CAUSE_E          (1 << 17)
  72 #define FPSCR_CAUSE_V          (1 << 16)
  73 #define FPSCR_CAUSE_Z          (1 << 15)
  74 #define FPSCR_CAUSE_O          (1 << 14)
  75 #define FPSCR_CAUSE_U          (1 << 13)
  76 #define FPSCR_CAUSE_I          (1 << 12)
  77 #define FPSCR_ENABLE_MASK      (0x1f << 7)
  78 #define FPSCR_ENABLE_SHIFT     (7)
  79 #define FPSCR_ENABLE_V         (1 << 11)
  80 #define FPSCR_ENABLE_Z         (1 << 10)
  81 #define FPSCR_ENABLE_O         (1 << 9)
  82 #define FPSCR_ENABLE_U         (1 << 8)
  83 #define FPSCR_ENABLE_I         (1 << 7)
  84 #define FPSCR_FLAG_MASK        (0x1f << 2)
  85 #define FPSCR_FLAG_SHIFT       (2)
  86 #define FPSCR_FLAG_V           (1 << 6)
  87 #define FPSCR_FLAG_Z           (1 << 5)
  88 #define FPSCR_FLAG_O           (1 << 4)
  89 #define FPSCR_FLAG_U           (1 << 3)
  90 #define FPSCR_FLAG_I           (1 << 2)
  91 #define FPSCR_RM_MASK          (0x03 << 0)
  92 #define FPSCR_RM_NEAREST       (0 << 0)
  93 #define FPSCR_RM_ZERO          (1 << 0)
  94
  95 #define DELAY_SLOT             (1 << 0)
  96 #define DELAY_SLOT_CONDITIONAL (1 << 1)
  97 #define DELAY_SLOT_TRUE        (1 << 2)
  98 #define DELAY_SLOT_CLEARME     (1 << 3)
  99 /* The dynamic value of the DELAY_SLOT_TRUE flag determines whether the jump
 100  * after the delay slot should be taken or not. It is calculated from SR_T.
 101  *
 102  * It is unclear if it is permitted to modify the SR_T flag in a delay slot.
 103  * The use of DELAY_SLOT_TRUE flag makes us accept such SR_T modification.
 104  */
 105
 106 typedef struct tlb_t {
 107     uint32_t vpn;               /* virtual page number */
 108     uint32_t ppn;               /* physical page number */
 109     uint32_t size;              /* mapped page size in bytes */
 110     uint8_t asid;               /* address space identifier */
 111     uint8_t v:1;                /* validity */
 112     uint8_t sz:2;               /* page size */
 113     uint8_t sh:1;               /* share status */
 114     uint8_t c:1;                /* cacheability */
 115     uint8_t pr:2;               /* protection key */
 116     uint8_t d:1;                /* dirty */
 117     uint8_t wt:1;               /* write through */
 118     uint8_t sa:3;               /* space attribute (PCMCIA) */
 119     uint8_t tc:1;               /* timing control */
 120 } tlb_t;
 121
 122 #define UTLB_SIZE 64
 123 #define ITLB_SIZE 4
 124
 125 #define NB_MMU_MODES 2
 126
 127 enum sh_features {
 128     SH_FEATURE_SH4A = 1,
 129     SH_FEATURE_BCR3_AND_BCR4 = 2,
 130 };
 131
 132 typedef struct memory_content {
 133     uint32_t address;
 134     uint32_t value;
 135     struct memory_content *next;
 136 } memory_content;
 137
 138 typedef struct CPUSH4State {
 139     uint32_t flags;             /* general execution flags */
 140     uint32_t gregs[24];         /* general registers */
 141     float32 fregs[32];          /* floating point registers */
 142     uint32_t sr;                /* status register */
 143     uint32_t ssr;               /* saved status register */
 144     uint32_t spc;               /* saved program counter */
 145     uint32_t gbr;               /* global base register */
 146     uint32_t vbr;               /* vector base register */
 147     uint32_t sgr;               /* saved global register 15 */
 148     uint32_t dbr;               /* debug base register */
 149     uint32_t pc;                /* program counter */
 150     uint32_t delayed_pc;        /* target of delayed jump */
 151     uint32_t mach;              /* multiply and accumulate high */
 152     uint32_t macl;              /* multiply and accumulate low */
 153     uint32_t pr;                /* procedure register */
 154     uint32_t fpscr;             /* floating point status/control register */
 155     uint32_t fpul;              /* floating point communication register */
 156
 157     /* float point status register */
 158     float_status fp_status;
 159
 160     /* The features that we should emulate. See sh_features above.  */
 161     uint32_t features;
 162
 163     /* Those belong to the specific unit (SH7750) but are handled here */
 164     uint32_t mmucr;             /* MMU control register */
 165     uint32_t pteh;              /* page table entry high register */
 166     uint32_t ptel;              /* page table entry low register */
 167     uint32_t ptea;              /* page table entry assistance register */
 168     uint32_t ttb;               /* tranlation table base register */
 169     uint32_t tea;               /* TLB exception address register */
 170     uint32_t tra;               /* TRAPA exception register */
 171     uint32_t expevt;            /* exception event register */
 172     uint32_t intevt;            /* interrupt event register */
 173
 174     tlb_t itlb[ITLB_SIZE];      /* instruction translation table */
 175     tlb_t utlb[UTLB_SIZE];      /* unified translation table */
 176
 177     uint32_t ldst;
 178
 179     CPU_COMMON
 180
 181     int id;                     /* CPU model */
 182     uint32_t pvr;               /* Processor Version Register */
 183     uint32_t prr;               /* Processor Revision Register */
 184     uint32_t cvr;               /* Cache Version Register */
 185
 186     void *intc_handle;
 187     int in_sleep;               /* SR_BL ignored during sleep */
 188     memory_content *movcal_backup;
 189     memory_content **movcal_backup_tail;
 190 } CPUSH4State;
 191
 192 CPUSH4State *cpu_sh4_init(const char *cpu_model);
 193 int cpu_sh4_exec(CPUSH4State * s);
 194 int cpu_sh4_signal_handler(int host_signum, void *pinfo,
 195                            void *puc);
 196 int cpu_sh4_handle_mmu_fault(CPUSH4State * env, target_ulong address, int rw,
 197                              int mmu_idx, int is_softmmu);
 198 #define cpu_handle_mmu_fault cpu_sh4_handle_mmu_fault
 199 void do_interrupt(CPUSH4State * env);
 200
 201 void sh4_cpu_list(FILE *f, fprintf_function cpu_fprintf);
 202 #if !defined(CONFIG_USER_ONLY)
 203 void cpu_sh4_invalidate_tlb(CPUSH4State *s);
 204 uint32_t cpu_sh4_read_mmaped_itlb_addr(CPUSH4State *s,
 205                                        target_phys_addr_t addr);
 206 void cpu_sh4_write_mmaped_itlb_addr(CPUSH4State *s, target_phys_addr_t addr,
 207                                     uint32_t mem_value);
 208 uint32_t cpu_sh4_read_mmaped_itlb_data(CPUSH4State *s,
 209                                        target_phys_addr_t addr);
 210 void cpu_sh4_write_mmaped_itlb_data(CPUSH4State *s, target_phys_addr_t addr,
 211                                     uint32_t mem_value);
 212 uint32_t cpu_sh4_read_mmaped_utlb_addr(CPUSH4State *s,
 213                                        target_phys_addr_t addr);
 214 void cpu_sh4_write_mmaped_utlb_addr(CPUSH4State *s, target_phys_addr_t addr,
 215                                     uint32_t mem_value);
 216 uint32_t cpu_sh4_read_mmaped_utlb_data(CPUSH4State *s,
 217                                        target_phys_addr_t addr);
 218 void cpu_sh4_write_mmaped_utlb_data(CPUSH4State *s, target_phys_addr_t addr,
 219                                     uint32_t mem_value);
 220 #endif
 221
 222 int cpu_sh4_is_cached(CPUSH4State * env, target_ulong addr);
 223
 224 static inline void cpu_set_tls(CPUSH4State *env, target_ulong newtls)
 225 {
 226   env->gbr = newtls;
 227 }
 228
 229 void cpu_load_tlb(CPUSH4State * env);
 230
 231 #include "softfloat.h"
 232
 233 #define cpu_init cpu_sh4_init
 234 #define cpu_exec cpu_sh4_exec
 235 #define cpu_gen_code cpu_sh4_gen_code
 236 #define cpu_signal_handler cpu_sh4_signal_handler
 237 #define cpu_list sh4_cpu_list
 238
 239 /* MMU modes definitions */
 240 #define MMU_MODE0_SUFFIX _kernel
 241 #define MMU_MODE1_SUFFIX _user
 242 #define MMU_USER_IDX 1
 243 static inline int cpu_mmu_index (CPUState *env)
 244 {
 245     return (env->sr & SR_MD) == 0 ? 1 : 0;
 246 }
 247
 248 #if defined(CONFIG_USER_ONLY)
 249 static inline void cpu_clone_regs(CPUState *env, target_ulong newsp)
 250 {
 251     if (newsp)
 252         env->gregs[15] = newsp;
 253     env->gregs[0] = 0;
 254 }
 255 #endif
 256
 257 #include "cpu-all.h"
 258
 259 /* Memory access type */
 260 enum {
 261     /* Privilege */
 262     ACCESS_PRIV = 0x01,
 263     /* Direction */
 264     ACCESS_WRITE = 0x02,
 265     /* Type of instruction */
 266     ACCESS_CODE = 0x10,
 267     ACCESS_INT = 0x20
 268 };
 269
 270 /* MMU control register */
 271 #define MMUCR    0x1F000010
 272 #define MMUCR_AT (1<<0)
 273 #define MMUCR_TI (1<<2)
 274 #define MMUCR_SV (1<<8)
 275 #define MMUCR_URC_BITS (6)
 276 #define MMUCR_URC_OFFSET (10)
 277 #define MMUCR_URC_SIZE (1 << MMUCR_URC_BITS)
 278 #define MMUCR_URC_MASK (((MMUCR_URC_SIZE) - 1) << MMUCR_URC_OFFSET)
 279 static inline int cpu_mmucr_urc (uint32_t mmucr)
 280 {
 281     return ((mmucr & MMUCR_URC_MASK) >> MMUCR_URC_OFFSET);
 282 }
 283
 284 /* PTEH : Page Translation Entry High register */
 285 #define PTEH_ASID_BITS (8)
 286 #define PTEH_ASID_SIZE (1 << PTEH_ASID_BITS)
 287 #define PTEH_ASID_MASK (PTEH_ASID_SIZE - 1)
 288 #define cpu_pteh_asid(pteh) ((pteh) & PTEH_ASID_MASK)
 289 #define PTEH_VPN_BITS (22)
 290 #define PTEH_VPN_OFFSET (10)
 291 #define PTEH_VPN_SIZE (1 << PTEH_VPN_BITS)
 292 #define PTEH_VPN_MASK (((PTEH_VPN_SIZE) - 1) << PTEH_VPN_OFFSET)
 293 static inline int cpu_pteh_vpn (uint32_t pteh)
 294 {
 295     return ((pteh & PTEH_VPN_MASK) >> PTEH_VPN_OFFSET);
 296 }
 297
 298 /* PTEL : Page Translation Entry Low register */
 299 #define PTEL_V        (1 << 8)
 300 #define cpu_ptel_v(ptel) (((ptel) & PTEL_V) >> 8)
 301 #define PTEL_C        (1 << 3)
 302 #define cpu_ptel_c(ptel) (((ptel) & PTEL_C) >> 3)
 303 #define PTEL_D        (1 << 2)
 304 #define cpu_ptel_d(ptel) (((ptel) & PTEL_D) >> 2)
 305 #define PTEL_SH       (1 << 1)
 306 #define cpu_ptel_sh(ptel)(((ptel) & PTEL_SH) >> 1)
 307 #define PTEL_WT       (1 << 0)
 308 #define cpu_ptel_wt(ptel) ((ptel) & PTEL_WT)
 309
 310 #define PTEL_SZ_HIGH_OFFSET  (7)
 311 #define PTEL_SZ_HIGH  (1 << PTEL_SZ_HIGH_OFFSET)
 312 #define PTEL_SZ_LOW_OFFSET   (4)
 313 #define PTEL_SZ_LOW   (1 << PTEL_SZ_LOW_OFFSET)
 314 static inline int cpu_ptel_sz (uint32_t ptel)
 315 {
 316     int sz;
 317     sz = (ptel & PTEL_SZ_HIGH) >> PTEL_SZ_HIGH_OFFSET;
 318     sz <<= 1;
 319     sz |= (ptel & PTEL_SZ_LOW) >> PTEL_SZ_LOW_OFFSET;
 320     return sz;
 321 }
 322
 323 #define PTEL_PPN_BITS (19)
 324 #define PTEL_PPN_OFFSET (10)
 325 #define PTEL_PPN_SIZE (1 << PTEL_PPN_BITS)
 326 #define PTEL_PPN_MASK (((PTEL_PPN_SIZE) - 1) << PTEL_PPN_OFFSET)
 327 static inline int cpu_ptel_ppn (uint32_t ptel)
 328 {
 329     return ((ptel & PTEL_PPN_MASK) >> PTEL_PPN_OFFSET);
 330 }
 331
 332 #define PTEL_PR_BITS   (2)
 333 #define PTEL_PR_OFFSET (5)
 334 #define PTEL_PR_SIZE (1 << PTEL_PR_BITS)
 335 #define PTEL_PR_MASK (((PTEL_PR_SIZE) - 1) << PTEL_PR_OFFSET)
 336 static inline int cpu_ptel_pr (uint32_t ptel)
 337 {
 338     return ((ptel & PTEL_PR_MASK) >> PTEL_PR_OFFSET);
 339 }
 340
 341 /* PTEA : Page Translation Entry Assistance register */
 342 #define PTEA_SA_BITS (3)
 343 #define PTEA_SA_SIZE (1 << PTEA_SA_BITS)
 344 #define PTEA_SA_MASK (PTEA_SA_SIZE - 1)
 345 #define cpu_ptea_sa(ptea) ((ptea) & PTEA_SA_MASK)
 346 #define PTEA_TC        (1 << 3)
 347 #define cpu_ptea_tc(ptea) (((ptea) & PTEA_TC) >> 3)
 348
 349 #define TB_FLAG_PENDING_MOVCA  (1 << 4)
 350
 351 static inline void cpu_get_tb_cpu_state(CPUState *env, target_ulong *pc,
 352                                         target_ulong *cs_base, int *flags)
 353 {
 354     *pc = env->pc;
 355     *cs_base = 0;
 356     *flags = (env->flags & (DELAY_SLOT | DELAY_SLOT_CONDITIONAL
 357                     | DELAY_SLOT_TRUE | DELAY_SLOT_CLEARME))   /* Bits  0- 3 */
 358             | (env->fpscr & (FPSCR_FR | FPSCR_SZ | FPSCR_PR))  /* Bits 19-21 */
 359             | (env->sr & (SR_MD | SR_RB))                      /* Bits 29-30 */
 360             | (env->sr & SR_FD)                                /* Bit 15 */
 361             | (env->movcal_backup ? TB_FLAG_PENDING_MOVCA : 0); /* Bit 4 */
 362 }
 363
 364 #endif                          /* _CPU_SH4_H */