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