target/sh4/cpu.h - third_party/qemu - Git at Google

 /*
  *  SH4 emulation
  *
  *  Copyright (c) 2005 Samuel Tardieu
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 2.1 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
  *
  * You should have received a copy of the GNU Lesser General Public
  * License along with this library; if not, see <http://www.gnu.org/licenses/>.
  */

 #ifndef SH4_CPU_H
 #define SH4_CPU_H

 #include "cpu-qom.h"
 #include "exec/cpu-defs.h"

 /* CPU Subtypes */
 #define SH_CPU_SH7750  (1 << 0)
 #define SH_CPU_SH7750S (1 << 1)
 #define SH_CPU_SH7750R (1 << 2)
 #define SH_CPU_SH7751  (1 << 3)
 #define SH_CPU_SH7751R (1 << 4)
 #define SH_CPU_SH7785  (1 << 5)
 #define SH_CPU_SH7750_ALL (SH_CPU_SH7750 | SH_CPU_SH7750S | SH_CPU_SH7750R)
 #define SH_CPU_SH7751_ALL (SH_CPU_SH7751 | SH_CPU_SH7751R)

 #define SR_MD 30
 #define SR_RB 29
 #define SR_BL 28
 #define SR_FD 15
 #define SR_M  9
 #define SR_Q  8
 #define SR_I3 7
 #define SR_I2 6
 #define SR_I1 5
 #define SR_I0 4
 #define SR_S  1
 #define SR_T  0

 #define FPSCR_MASK             (0x003fffff)
 #define FPSCR_FR               (1 << 21)
 #define FPSCR_SZ               (1 << 20)
 #define FPSCR_PR               (1 << 19)
 #define FPSCR_DN               (1 << 18)
 #define FPSCR_CAUSE_MASK       (0x3f << 12)
 #define FPSCR_CAUSE_SHIFT      (12)
 #define FPSCR_CAUSE_E          (1 << 17)
 #define FPSCR_CAUSE_V          (1 << 16)
 #define FPSCR_CAUSE_Z          (1 << 15)
 #define FPSCR_CAUSE_O          (1 << 14)
 #define FPSCR_CAUSE_U          (1 << 13)
 #define FPSCR_CAUSE_I          (1 << 12)
 #define FPSCR_ENABLE_MASK      (0x1f << 7)
 #define FPSCR_ENABLE_SHIFT     (7)
 #define FPSCR_ENABLE_V         (1 << 11)
 #define FPSCR_ENABLE_Z         (1 << 10)
 #define FPSCR_ENABLE_O         (1 << 9)
 #define FPSCR_ENABLE_U         (1 << 8)
 #define FPSCR_ENABLE_I         (1 << 7)
 #define FPSCR_FLAG_MASK        (0x1f << 2)
 #define FPSCR_FLAG_SHIFT       (2)
 #define FPSCR_FLAG_V           (1 << 6)
 #define FPSCR_FLAG_Z           (1 << 5)
 #define FPSCR_FLAG_O           (1 << 4)
 #define FPSCR_FLAG_U           (1 << 3)
 #define FPSCR_FLAG_I           (1 << 2)
 #define FPSCR_RM_MASK          (0x03 << 0)
 #define FPSCR_RM_NEAREST       (0 << 0)
 #define FPSCR_RM_ZERO          (1 << 0)

 #define DELAY_SLOT_MASK        0x7
 #define DELAY_SLOT             (1 << 0)
 #define DELAY_SLOT_CONDITIONAL (1 << 1)
 #define DELAY_SLOT_RTE         (1 << 2)

 #define TB_FLAG_PENDING_MOVCA  (1 << 3)

 #define GUSA_SHIFT             4
 #ifdef CONFIG_USER_ONLY
 #define GUSA_EXCLUSIVE         (1 << 12)
 #define GUSA_MASK              ((0xff << GUSA_SHIFT) | GUSA_EXCLUSIVE)
 #else
 /* Provide dummy versions of the above to allow tests against tbflags
    to be elided while avoiding ifdefs.  */
 #define GUSA_EXCLUSIVE         0
 #define GUSA_MASK              0
 #endif

 #define TB_FLAG_ENVFLAGS_MASK  (DELAY_SLOT_MASK | GUSA_MASK)

 typedef struct tlb_t {
     uint32_t vpn;		/* virtual page number */
     uint32_t ppn;		/* physical page number */
     uint32_t size;		/* mapped page size in bytes */
     uint8_t asid;		/* address space identifier */
     uint8_t v:1;		/* validity */
     uint8_t sz:2;		/* page size */
     uint8_t sh:1;		/* share status */
     uint8_t c:1;		/* cacheability */
     uint8_t pr:2;		/* protection key */
     uint8_t d:1;		/* dirty */
     uint8_t wt:1;		/* write through */
     uint8_t sa:3;		/* space attribute (PCMCIA) */
     uint8_t tc:1;		/* timing control */
 } tlb_t;

 #define UTLB_SIZE 64
 #define ITLB_SIZE 4

 #define TARGET_INSN_START_EXTRA_WORDS 1

 enum sh_features {
     SH_FEATURE_SH4A = 1,
     SH_FEATURE_BCR3_AND_BCR4 = 2,
 };

 typedef struct memory_content {
     uint32_t address;
     uint32_t value;
     struct memory_content *next;
 } memory_content;

 typedef struct CPUSH4State {
     uint32_t flags;		/* general execution flags */
     uint32_t gregs[24];		/* general registers */
     float32 fregs[32];		/* floating point registers */
     uint32_t sr;                /* status register (with T split out) */
     uint32_t sr_m;              /* M bit of status register */
     uint32_t sr_q;              /* Q bit of status register */
     uint32_t sr_t;              /* T bit of status register */
     uint32_t ssr;		/* saved status register */
     uint32_t spc;		/* saved program counter */
     uint32_t gbr;		/* global base register */
     uint32_t vbr;		/* vector base register */
     uint32_t sgr;		/* saved global register 15 */
     uint32_t dbr;		/* debug base register */
     uint32_t pc;		/* program counter */
     uint32_t delayed_pc;        /* target of delayed branch */
     uint32_t delayed_cond;      /* condition of delayed branch */
     uint32_t mach;		/* multiply and accumulate high */
     uint32_t macl;		/* multiply and accumulate low */
     uint32_t pr;		/* procedure register */
     uint32_t fpscr;		/* floating point status/control register */
     uint32_t fpul;		/* floating point communication register */

     /* float point status register */
     float_status fp_status;

     /* Those belong to the specific unit (SH7750) but are handled here */
     uint32_t mmucr;		/* MMU control register */
     uint32_t pteh;		/* page table entry high register */
     uint32_t ptel;		/* page table entry low register */
     uint32_t ptea;		/* page table entry assistance register */
     uint32_t ttb;		/* tranlation table base register */
     uint32_t tea;		/* TLB exception address register */
     uint32_t tra;		/* TRAPA exception register */
     uint32_t expevt;		/* exception event register */
     uint32_t intevt;		/* interrupt event register */

     tlb_t itlb[ITLB_SIZE];	/* instruction translation table */
     tlb_t utlb[UTLB_SIZE];	/* unified translation table */

     /* LDST = LOCK_ADDR != -1.  */
     uint32_t lock_addr;
     uint32_t lock_value;

     /* Fields up to this point are cleared by a CPU reset */
     struct {} end_reset_fields;

     /* Fields from here on are preserved over CPU reset. */
     int id;			/* CPU model */

     /* The features that we should emulate. See sh_features above.  */
     uint32_t features;

     void *intc_handle;
     int in_sleep;		/* SR_BL ignored during sleep */
     memory_content *movcal_backup;
     memory_content **movcal_backup_tail;
 } CPUSH4State;

 /**
  * SuperHCPU:
  * @env: #CPUSH4State
  *
  * A SuperH CPU.
  */
 struct SuperHCPU {
     /*< private >*/
     CPUState parent_obj;
     /*< public >*/

     CPUNegativeOffsetState neg;
     CPUSH4State env;
 };


 void superh_cpu_do_interrupt(CPUState *cpu);
 bool superh_cpu_exec_interrupt(CPUState *cpu, int int_req);
 void superh_cpu_dump_state(CPUState *cpu, FILE *f, int flags);
 hwaddr superh_cpu_get_phys_page_debug(CPUState *cpu, vaddr addr);
 int superh_cpu_gdb_read_register(CPUState *cpu, GByteArray *buf, int reg);
 int superh_cpu_gdb_write_register(CPUState *cpu, uint8_t *buf, int reg);
 void superh_cpu_do_unaligned_access(CPUState *cpu, vaddr addr,
                                     MMUAccessType access_type,
                                     int mmu_idx, uintptr_t retaddr);

 void sh4_translate_init(void);
 int cpu_sh4_signal_handler(int host_signum, void *pinfo,
                            void *puc);
 bool superh_cpu_tlb_fill(CPUState *cs, vaddr address, int size,
                          MMUAccessType access_type, int mmu_idx,
                          bool probe, uintptr_t retaddr);

 void sh4_cpu_list(void);
 #if !defined(CONFIG_USER_ONLY)
 void cpu_sh4_invalidate_tlb(CPUSH4State *s);
 uint32_t cpu_sh4_read_mmaped_itlb_addr(CPUSH4State *s,
                                        hwaddr addr);
 void cpu_sh4_write_mmaped_itlb_addr(CPUSH4State *s, hwaddr addr,
                                     uint32_t mem_value);
 uint32_t cpu_sh4_read_mmaped_itlb_data(CPUSH4State *s,
                                        hwaddr addr);
 void cpu_sh4_write_mmaped_itlb_data(CPUSH4State *s, hwaddr addr,
                                     uint32_t mem_value);
 uint32_t cpu_sh4_read_mmaped_utlb_addr(CPUSH4State *s,
                                        hwaddr addr);
 void cpu_sh4_write_mmaped_utlb_addr(CPUSH4State *s, hwaddr addr,
                                     uint32_t mem_value);
 uint32_t cpu_sh4_read_mmaped_utlb_data(CPUSH4State *s,
                                        hwaddr addr);
 void cpu_sh4_write_mmaped_utlb_data(CPUSH4State *s, hwaddr addr,
                                     uint32_t mem_value);
 #endif

 int cpu_sh4_is_cached(CPUSH4State * env, target_ulong addr);

 void cpu_load_tlb(CPUSH4State * env);

 #define SUPERH_CPU_TYPE_SUFFIX "-" TYPE_SUPERH_CPU
 #define SUPERH_CPU_TYPE_NAME(model) model SUPERH_CPU_TYPE_SUFFIX
 #define CPU_RESOLVING_TYPE TYPE_SUPERH_CPU

 #define cpu_signal_handler cpu_sh4_signal_handler
 #define cpu_list sh4_cpu_list

 /* MMU modes definitions */
 #define MMU_USER_IDX 1
 static inline int cpu_mmu_index (CPUSH4State *env, bool ifetch)
 {
     /* The instruction in a RTE delay slot is fetched in privileged
        mode, but executed in user mode.  */
     if (ifetch && (env->flags & DELAY_SLOT_RTE)) {
         return 0;
     } else {
         return (env->sr & (1u << SR_MD)) == 0 ? 1 : 0;
     }
 }

 typedef CPUSH4State CPUArchState;
 typedef SuperHCPU ArchCPU;

 #include "exec/cpu-all.h"

 /* Memory access type */
 enum {
     /* Privilege */
     ACCESS_PRIV = 0x01,
     /* Direction */
     ACCESS_WRITE = 0x02,
     /* Type of instruction */
     ACCESS_CODE = 0x10,
     ACCESS_INT = 0x20
 };

 /* MMU control register */
 #define MMUCR    0x1F000010
 #define MMUCR_AT (1<<0)
 #define MMUCR_TI (1<<2)
 #define MMUCR_SV (1<<8)
 #define MMUCR_URC_BITS (6)
 #define MMUCR_URC_OFFSET (10)
 #define MMUCR_URC_SIZE (1 << MMUCR_URC_BITS)
 #define MMUCR_URC_MASK (((MMUCR_URC_SIZE) - 1) << MMUCR_URC_OFFSET)
 static inline int cpu_mmucr_urc (uint32_t mmucr)
 {
     return ((mmucr & MMUCR_URC_MASK) >> MMUCR_URC_OFFSET);
 }

 /* PTEH : Page Translation Entry High register */
 #define PTEH_ASID_BITS (8)
 #define PTEH_ASID_SIZE (1 << PTEH_ASID_BITS)
 #define PTEH_ASID_MASK (PTEH_ASID_SIZE - 1)
 #define cpu_pteh_asid(pteh) ((pteh) & PTEH_ASID_MASK)
 #define PTEH_VPN_BITS (22)
 #define PTEH_VPN_OFFSET (10)
 #define PTEH_VPN_SIZE (1 << PTEH_VPN_BITS)
 #define PTEH_VPN_MASK (((PTEH_VPN_SIZE) - 1) << PTEH_VPN_OFFSET)
 static inline int cpu_pteh_vpn (uint32_t pteh)
 {
     return ((pteh & PTEH_VPN_MASK) >> PTEH_VPN_OFFSET);
 }

 /* PTEL : Page Translation Entry Low register */
 #define PTEL_V        (1 << 8)
 #define cpu_ptel_v(ptel) (((ptel) & PTEL_V) >> 8)
 #define PTEL_C        (1 << 3)
 #define cpu_ptel_c(ptel) (((ptel) & PTEL_C) >> 3)
 #define PTEL_D        (1 << 2)
 #define cpu_ptel_d(ptel) (((ptel) & PTEL_D) >> 2)
 #define PTEL_SH       (1 << 1)
 #define cpu_ptel_sh(ptel)(((ptel) & PTEL_SH) >> 1)
 #define PTEL_WT       (1 << 0)
 #define cpu_ptel_wt(ptel) ((ptel) & PTEL_WT)

 #define PTEL_SZ_HIGH_OFFSET  (7)
 #define PTEL_SZ_HIGH  (1 << PTEL_SZ_HIGH_OFFSET)
 #define PTEL_SZ_LOW_OFFSET   (4)
 #define PTEL_SZ_LOW   (1 << PTEL_SZ_LOW_OFFSET)
 static inline int cpu_ptel_sz (uint32_t ptel)
 {
     int sz;
     sz = (ptel & PTEL_SZ_HIGH) >> PTEL_SZ_HIGH_OFFSET;
     sz <<= 1;
     sz |= (ptel & PTEL_SZ_LOW) >> PTEL_SZ_LOW_OFFSET;
     return sz;
 }

 #define PTEL_PPN_BITS (19)
 #define PTEL_PPN_OFFSET (10)
 #define PTEL_PPN_SIZE (1 << PTEL_PPN_BITS)
 #define PTEL_PPN_MASK (((PTEL_PPN_SIZE) - 1) << PTEL_PPN_OFFSET)
 static inline int cpu_ptel_ppn (uint32_t ptel)
 {
     return ((ptel & PTEL_PPN_MASK) >> PTEL_PPN_OFFSET);
 }

 #define PTEL_PR_BITS   (2)
 #define PTEL_PR_OFFSET (5)
 #define PTEL_PR_SIZE (1 << PTEL_PR_BITS)
 #define PTEL_PR_MASK (((PTEL_PR_SIZE) - 1) << PTEL_PR_OFFSET)
 static inline int cpu_ptel_pr (uint32_t ptel)
 {
     return ((ptel & PTEL_PR_MASK) >> PTEL_PR_OFFSET);
 }

 /* PTEA : Page Translation Entry Assistance register */
 #define PTEA_SA_BITS (3)
 #define PTEA_SA_SIZE (1 << PTEA_SA_BITS)
 #define PTEA_SA_MASK (PTEA_SA_SIZE - 1)
 #define cpu_ptea_sa(ptea) ((ptea) & PTEA_SA_MASK)
 #define PTEA_TC        (1 << 3)
 #define cpu_ptea_tc(ptea) (((ptea) & PTEA_TC) >> 3)

 static inline target_ulong cpu_read_sr(CPUSH4State *env)
 {
     return env->sr | (env->sr_m << SR_M) |
                      (env->sr_q << SR_Q) |
                      (env->sr_t << SR_T);
 }

 static inline void cpu_write_sr(CPUSH4State *env, target_ulong sr)
 {
     env->sr_m = (sr >> SR_M) & 1;
     env->sr_q = (sr >> SR_Q) & 1;
     env->sr_t = (sr >> SR_T) & 1;
     env->sr = sr & ~((1u << SR_M) | (1u << SR_Q) | (1u << SR_T));
 }

 static inline void cpu_get_tb_cpu_state(CPUSH4State *env, target_ulong *pc,
                                         target_ulong *cs_base, uint32_t *flags)
 {
     *pc = env->pc;
     /* For a gUSA region, notice the end of the region.  */
     *cs_base = env->flags & GUSA_MASK ? env->gregs[0] : 0;
     *flags = env->flags /* TB_FLAG_ENVFLAGS_MASK: bits 0-2, 4-12 */
             | (env->fpscr & (FPSCR_FR | FPSCR_SZ | FPSCR_PR))  /* Bits 19-21 */
             | (env->sr & ((1u << SR_MD) | (1u << SR_RB)))      /* Bits 29-30 */
             | (env->sr & (1u << SR_FD))                        /* Bit 15 */
             | (env->movcal_backup ? TB_FLAG_PENDING_MOVCA : 0); /* Bit 3 */
 }

 #endif /* SH4_CPU_H */
	/*
	* SH4 emulation
	*
	* Copyright (c) 2005 Samuel Tardieu
	*
	* This library is free software; you can redistribute it and/or
	* modify it under the terms of the GNU Lesser General Public
	* License as published by the Free Software Foundation; either
	* version 2.1 of the License, or (at your option) any later version.
	*
	* This library is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	* Lesser General Public License for more details.
	*
	* You should have received a copy of the GNU Lesser General Public
	* License along with this library; if not, see <http://www.gnu.org/licenses/>.
	*/

	#ifndef SH4_CPU_H
	#define SH4_CPU_H

	#include "cpu-qom.h"
	#include "exec/cpu-defs.h"

	/* CPU Subtypes */
	#define SH_CPU_SH7750 (1 << 0)
	#define SH_CPU_SH7750S (1 << 1)
	#define SH_CPU_SH7750R (1 << 2)
	#define SH_CPU_SH7751 (1 << 3)
	#define SH_CPU_SH7751R (1 << 4)
	#define SH_CPU_SH7785 (1 << 5)
	#define SH_CPU_SH7750_ALL (SH_CPU_SH7750 \| SH_CPU_SH7750S \| SH_CPU_SH7750R)
	#define SH_CPU_SH7751_ALL (SH_CPU_SH7751 \| SH_CPU_SH7751R)

	#define SR_MD 30
	#define SR_RB 29
	#define SR_BL 28
	#define SR_FD 15
	#define SR_M 9
	#define SR_Q 8
	#define SR_I3 7
	#define SR_I2 6
	#define SR_I1 5
	#define SR_I0 4
	#define SR_S 1
	#define SR_T 0

	#define FPSCR_MASK (0x003fffff)
	#define FPSCR_FR (1 << 21)
	#define FPSCR_SZ (1 << 20)
	#define FPSCR_PR (1 << 19)
	#define FPSCR_DN (1 << 18)
	#define FPSCR_CAUSE_MASK (0x3f << 12)
	#define FPSCR_CAUSE_SHIFT (12)
	#define FPSCR_CAUSE_E (1 << 17)
	#define FPSCR_CAUSE_V (1 << 16)
	#define FPSCR_CAUSE_Z (1 << 15)
	#define FPSCR_CAUSE_O (1 << 14)
	#define FPSCR_CAUSE_U (1 << 13)
	#define FPSCR_CAUSE_I (1 << 12)
	#define FPSCR_ENABLE_MASK (0x1f << 7)
	#define FPSCR_ENABLE_SHIFT (7)
	#define FPSCR_ENABLE_V (1 << 11)
	#define FPSCR_ENABLE_Z (1 << 10)
	#define FPSCR_ENABLE_O (1 << 9)
	#define FPSCR_ENABLE_U (1 << 8)
	#define FPSCR_ENABLE_I (1 << 7)
	#define FPSCR_FLAG_MASK (0x1f << 2)
	#define FPSCR_FLAG_SHIFT (2)
	#define FPSCR_FLAG_V (1 << 6)
	#define FPSCR_FLAG_Z (1 << 5)
	#define FPSCR_FLAG_O (1 << 4)
	#define FPSCR_FLAG_U (1 << 3)
	#define FPSCR_FLAG_I (1 << 2)
	#define FPSCR_RM_MASK (0x03 << 0)
	#define FPSCR_RM_NEAREST (0 << 0)
	#define FPSCR_RM_ZERO (1 << 0)

	#define DELAY_SLOT_MASK 0x7
	#define DELAY_SLOT (1 << 0)
	#define DELAY_SLOT_CONDITIONAL (1 << 1)
	#define DELAY_SLOT_RTE (1 << 2)

	#define TB_FLAG_PENDING_MOVCA (1 << 3)

	#define GUSA_SHIFT 4
	#ifdef CONFIG_USER_ONLY
	#define GUSA_EXCLUSIVE (1 << 12)
	#define GUSA_MASK ((0xff << GUSA_SHIFT) \| GUSA_EXCLUSIVE)
	#else
	/* Provide dummy versions of the above to allow tests against tbflags
	to be elided while avoiding ifdefs. */
	#define GUSA_EXCLUSIVE 0
	#define GUSA_MASK 0
	#endif

	#define TB_FLAG_ENVFLAGS_MASK (DELAY_SLOT_MASK \| GUSA_MASK)

	typedef struct tlb_t {
	uint32_t vpn; /* virtual page number */
	uint32_t ppn; /* physical page number */
	uint32_t size; /* mapped page size in bytes */
	uint8_t asid; /* address space identifier */
	uint8_t v:1; /* validity */
	uint8_t sz:2; /* page size */
	uint8_t sh:1; /* share status */
	uint8_t c:1; /* cacheability */
	uint8_t pr:2; /* protection key */
	uint8_t d:1; /* dirty */
	uint8_t wt:1; /* write through */
	uint8_t sa:3; /* space attribute (PCMCIA) */
	uint8_t tc:1; /* timing control */
	} tlb_t;

	#define UTLB_SIZE 64
	#define ITLB_SIZE 4

	#define TARGET_INSN_START_EXTRA_WORDS 1

	enum sh_features {
	SH_FEATURE_SH4A = 1,
	SH_FEATURE_BCR3_AND_BCR4 = 2,
	};

	typedef struct memory_content {
	uint32_t address;
	uint32_t value;
	struct memory_content *next;
	} memory_content;

	typedef struct CPUSH4State {
	uint32_t flags; /* general execution flags */
	uint32_t gregs[24]; /* general registers */
	float32 fregs[32]; /* floating point registers */
	uint32_t sr; /* status register (with T split out) */
	uint32_t sr_m; /* M bit of status register */
	uint32_t sr_q; /* Q bit of status register */
	uint32_t sr_t; /* T bit of status register */
	uint32_t ssr; /* saved status register */
	uint32_t spc; /* saved program counter */
	uint32_t gbr; /* global base register */
	uint32_t vbr; /* vector base register */
	uint32_t sgr; /* saved global register 15 */
	uint32_t dbr; /* debug base register */
	uint32_t pc; /* program counter */
	uint32_t delayed_pc; /* target of delayed branch */
	uint32_t delayed_cond; /* condition of delayed branch */
	uint32_t mach; /* multiply and accumulate high */
	uint32_t macl; /* multiply and accumulate low */
	uint32_t pr; /* procedure register */
	uint32_t fpscr; /* floating point status/control register */
	uint32_t fpul; /* floating point communication register */

	/* float point status register */
	float_status fp_status;

	/* Those belong to the specific unit (SH7750) but are handled here */
	uint32_t mmucr; /* MMU control register */
	uint32_t pteh; /* page table entry high register */
	uint32_t ptel; /* page table entry low register */
	uint32_t ptea; /* page table entry assistance register */
	uint32_t ttb; /* tranlation table base register */
	uint32_t tea; /* TLB exception address register */
	uint32_t tra; /* TRAPA exception register */
	uint32_t expevt; /* exception event register */
	uint32_t intevt; /* interrupt event register */

	tlb_t itlb[ITLB_SIZE]; /* instruction translation table */
	tlb_t utlb[UTLB_SIZE]; /* unified translation table */

	/* LDST = LOCK_ADDR != -1. */
	uint32_t lock_addr;
	uint32_t lock_value;

	/* Fields up to this point are cleared by a CPU reset */
	struct {} end_reset_fields;

	/* Fields from here on are preserved over CPU reset. */
	int id; /* CPU model */

	/* The features that we should emulate. See sh_features above. */
	uint32_t features;

	void *intc_handle;
	int in_sleep; /* SR_BL ignored during sleep */
	memory_content *movcal_backup;
	memory_content **movcal_backup_tail;
	} CPUSH4State;

	/**
	* SuperHCPU:
	* @env: #CPUSH4State
	*
	* A SuperH CPU.
	*/
	struct SuperHCPU {
	/< private >/
	CPUState parent_obj;
	/< public >/

	CPUNegativeOffsetState neg;
	CPUSH4State env;
	};


	void superh_cpu_do_interrupt(CPUState *cpu);
	bool superh_cpu_exec_interrupt(CPUState *cpu, int int_req);
	void superh_cpu_dump_state(CPUState cpu, FILE f, int flags);
	hwaddr superh_cpu_get_phys_page_debug(CPUState *cpu, vaddr addr);
	int superh_cpu_gdb_read_register(CPUState cpu, GByteArray buf, int reg);
	int superh_cpu_gdb_write_register(CPUState cpu, uint8_t buf, int reg);
	void superh_cpu_do_unaligned_access(CPUState *cpu, vaddr addr,
	MMUAccessType access_type,
	int mmu_idx, uintptr_t retaddr);

	void sh4_translate_init(void);
	int cpu_sh4_signal_handler(int host_signum, void *pinfo,
	void *puc);
	bool superh_cpu_tlb_fill(CPUState *cs, vaddr address, int size,
	MMUAccessType access_type, int mmu_idx,
	bool probe, uintptr_t retaddr);

	void sh4_cpu_list(void);
	#if !defined(CONFIG_USER_ONLY)
	void cpu_sh4_invalidate_tlb(CPUSH4State *s);
	uint32_t cpu_sh4_read_mmaped_itlb_addr(CPUSH4State *s,
	hwaddr addr);
	void cpu_sh4_write_mmaped_itlb_addr(CPUSH4State *s, hwaddr addr,
	uint32_t mem_value);
	uint32_t cpu_sh4_read_mmaped_itlb_data(CPUSH4State *s,
	hwaddr addr);
	void cpu_sh4_write_mmaped_itlb_data(CPUSH4State *s, hwaddr addr,
	uint32_t mem_value);
	uint32_t cpu_sh4_read_mmaped_utlb_addr(CPUSH4State *s,
	hwaddr addr);
	void cpu_sh4_write_mmaped_utlb_addr(CPUSH4State *s, hwaddr addr,
	uint32_t mem_value);
	uint32_t cpu_sh4_read_mmaped_utlb_data(CPUSH4State *s,
	hwaddr addr);
	void cpu_sh4_write_mmaped_utlb_data(CPUSH4State *s, hwaddr addr,
	uint32_t mem_value);
	#endif

	int cpu_sh4_is_cached(CPUSH4State * env, target_ulong addr);

	void cpu_load_tlb(CPUSH4State * env);

	#define SUPERH_CPU_TYPE_SUFFIX "-" TYPE_SUPERH_CPU
	#define SUPERH_CPU_TYPE_NAME(model) model SUPERH_CPU_TYPE_SUFFIX
	#define CPU_RESOLVING_TYPE TYPE_SUPERH_CPU

	#define cpu_signal_handler cpu_sh4_signal_handler
	#define cpu_list sh4_cpu_list

	/* MMU modes definitions */
	#define MMU_USER_IDX 1
	static inline int cpu_mmu_index (CPUSH4State *env, bool ifetch)
	{
	/* The instruction in a RTE delay slot is fetched in privileged
	mode, but executed in user mode. */
	if (ifetch && (env->flags & DELAY_SLOT_RTE)) {
	return 0;
	} else {
	return (env->sr & (1u << SR_MD)) == 0 ? 1 : 0;
	}
	}

	typedef CPUSH4State CPUArchState;
	typedef SuperHCPU ArchCPU;

	#include "exec/cpu-all.h"

	/* Memory access type */
	enum {
	/* Privilege */
	ACCESS_PRIV = 0x01,
	/* Direction */
	ACCESS_WRITE = 0x02,
	/* Type of instruction */
	ACCESS_CODE = 0x10,
	ACCESS_INT = 0x20
	};

	/* MMU control register */
	#define MMUCR 0x1F000010
	#define MMUCR_AT (1<<0)
	#define MMUCR_TI (1<<2)
	#define MMUCR_SV (1<<8)
	#define MMUCR_URC_BITS (6)
	#define MMUCR_URC_OFFSET (10)
	#define MMUCR_URC_SIZE (1 << MMUCR_URC_BITS)
	#define MMUCR_URC_MASK (((MMUCR_URC_SIZE) - 1) << MMUCR_URC_OFFSET)
	static inline int cpu_mmucr_urc (uint32_t mmucr)
	{
	return ((mmucr & MMUCR_URC_MASK) >> MMUCR_URC_OFFSET);
	}

	/* PTEH : Page Translation Entry High register */
	#define PTEH_ASID_BITS (8)
	#define PTEH_ASID_SIZE (1 << PTEH_ASID_BITS)
	#define PTEH_ASID_MASK (PTEH_ASID_SIZE - 1)
	#define cpu_pteh_asid(pteh) ((pteh) & PTEH_ASID_MASK)
	#define PTEH_VPN_BITS (22)
	#define PTEH_VPN_OFFSET (10)
	#define PTEH_VPN_SIZE (1 << PTEH_VPN_BITS)
	#define PTEH_VPN_MASK (((PTEH_VPN_SIZE) - 1) << PTEH_VPN_OFFSET)
	static inline int cpu_pteh_vpn (uint32_t pteh)
	{
	return ((pteh & PTEH_VPN_MASK) >> PTEH_VPN_OFFSET);
	}

	/* PTEL : Page Translation Entry Low register */
	#define PTEL_V (1 << 8)
	#define cpu_ptel_v(ptel) (((ptel) & PTEL_V) >> 8)
	#define PTEL_C (1 << 3)
	#define cpu_ptel_c(ptel) (((ptel) & PTEL_C) >> 3)
	#define PTEL_D (1 << 2)
	#define cpu_ptel_d(ptel) (((ptel) & PTEL_D) >> 2)
	#define PTEL_SH (1 << 1)
	#define cpu_ptel_sh(ptel)(((ptel) & PTEL_SH) >> 1)
	#define PTEL_WT (1 << 0)
	#define cpu_ptel_wt(ptel) ((ptel) & PTEL_WT)

	#define PTEL_SZ_HIGH_OFFSET (7)
	#define PTEL_SZ_HIGH (1 << PTEL_SZ_HIGH_OFFSET)
	#define PTEL_SZ_LOW_OFFSET (4)
	#define PTEL_SZ_LOW (1 << PTEL_SZ_LOW_OFFSET)
	static inline int cpu_ptel_sz (uint32_t ptel)
	{
	int sz;
	sz = (ptel & PTEL_SZ_HIGH) >> PTEL_SZ_HIGH_OFFSET;
	sz <<= 1;
	sz \|= (ptel & PTEL_SZ_LOW) >> PTEL_SZ_LOW_OFFSET;
	return sz;
	}

	#define PTEL_PPN_BITS (19)
	#define PTEL_PPN_OFFSET (10)
	#define PTEL_PPN_SIZE (1 << PTEL_PPN_BITS)
	#define PTEL_PPN_MASK (((PTEL_PPN_SIZE) - 1) << PTEL_PPN_OFFSET)
	static inline int cpu_ptel_ppn (uint32_t ptel)
	{
	return ((ptel & PTEL_PPN_MASK) >> PTEL_PPN_OFFSET);
	}

	#define PTEL_PR_BITS (2)
	#define PTEL_PR_OFFSET (5)
	#define PTEL_PR_SIZE (1 << PTEL_PR_BITS)
	#define PTEL_PR_MASK (((PTEL_PR_SIZE) - 1) << PTEL_PR_OFFSET)
	static inline int cpu_ptel_pr (uint32_t ptel)
	{
	return ((ptel & PTEL_PR_MASK) >> PTEL_PR_OFFSET);
	}

	/* PTEA : Page Translation Entry Assistance register */
	#define PTEA_SA_BITS (3)
	#define PTEA_SA_SIZE (1 << PTEA_SA_BITS)
	#define PTEA_SA_MASK (PTEA_SA_SIZE - 1)
	#define cpu_ptea_sa(ptea) ((ptea) & PTEA_SA_MASK)
	#define PTEA_TC (1 << 3)
	#define cpu_ptea_tc(ptea) (((ptea) & PTEA_TC) >> 3)

	static inline target_ulong cpu_read_sr(CPUSH4State *env)
	{
	return env->sr \| (env->sr_m << SR_M) \|
	(env->sr_q << SR_Q) \|
	(env->sr_t << SR_T);
	}

	static inline void cpu_write_sr(CPUSH4State *env, target_ulong sr)
	{
	env->sr_m = (sr >> SR_M) & 1;
	env->sr_q = (sr >> SR_Q) & 1;
	env->sr_t = (sr >> SR_T) & 1;
	env->sr = sr & ~((1u << SR_M) \| (1u << SR_Q) \| (1u << SR_T));
	}

	static inline void cpu_get_tb_cpu_state(CPUSH4State env, target_ulong pc,
	target_ulong cs_base, uint32_t flags)
	{
	*pc = env->pc;
	/* For a gUSA region, notice the end of the region. */
	*cs_base = env->flags & GUSA_MASK ? env->gregs[0] : 0;
	flags = env->flags / TB_FLAG_ENVFLAGS_MASK: bits 0-2, 4-12 */
	\| (env->fpscr & (FPSCR_FR \| FPSCR_SZ \| FPSCR_PR)) /* Bits 19-21 */
	\| (env->sr & ((1u << SR_MD) \| (1u << SR_RB))) /* Bits 29-30 */
	\| (env->sr & (1u << SR_FD)) /* Bit 15 */
	\| (env->movcal_backup ? TB_FLAG_PENDING_MOVCA : 0); /* Bit 3 */
	}

	#endif /* SH4_CPU_H */