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 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 _CPU_SH4_H
 #define _CPU_SH4_H

 #include "config.h"

 #define TARGET_LONG_BITS 32
 #define TARGET_HAS_ICE 1

 #define ELF_MACHINE	EM_SH

 /* 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 CPUState struct CPUSH4State

 #include "cpu-defs.h"

 #include "softfloat.h"

 #define TARGET_PAGE_BITS 12	/* 4k XXXXX */

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

 #define FPSCR_FR (1 << 21)
 #define FPSCR_SZ (1 << 20)
 #define FPSCR_PR (1 << 19)
 #define FPSCR_DN (1 << 18)
 #define DELAY_SLOT             (1 << 0)
 #define DELAY_SLOT_CONDITIONAL (1 << 1)
 #define DELAY_SLOT_TRUE        (1 << 2)
 #define DELAY_SLOT_CLEARME     (1 << 3)
 /* The dynamic value of the DELAY_SLOT_TRUE flag determines whether the jump
  * after the delay slot should be taken or not. It is calculated from SR_T.
  *
  * It is unclear if it is permitted to modify the SR_T flag in a delay slot.
  * The use of DELAY_SLOT_TRUE flag makes us accept such SR_T modification.
  */

 /* XXXXX The structure could be made more compact */
 typedef struct tlb_t {
     uint8_t asid;		/* address space identifier */
     uint32_t vpn;		/* virtual page number */
     uint8_t v;			/* validity */
     uint32_t ppn;		/* physical page number */
     uint8_t sz;			/* page size */
     uint32_t size;		/* cached page size in bytes */
     uint8_t sh;			/* share status */
     uint8_t c;			/* cacheability */
     uint8_t pr;			/* protection key */
     uint8_t d;			/* dirty */
     uint8_t wt;			/* write through */
     uint8_t sa;			/* space attribute (PCMCIA) */
     uint8_t tc;			/* timing control */
 } tlb_t;

 #define UTLB_SIZE 64
 #define ITLB_SIZE 4

 #define NB_MMU_MODES 2

 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 {
     int id;			/* CPU model */

     uint32_t flags;		/* general execution flags */
     uint32_t gregs[24];		/* general registers */
     float32 fregs[32];		/* floating point registers */
     uint32_t sr;		/* 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 jump */
     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;

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

     /* 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 */

     uint32_t pvr;		/* Processor Version Register */
     uint32_t prr;		/* Processor Revision Register */
     uint32_t cvr;		/* Cache Version Register */

     uint32_t ldst;

      CPU_COMMON tlb_t utlb[UTLB_SIZE];	/* unified translation table */
     tlb_t itlb[ITLB_SIZE];	/* instruction translation table */
     void *intc_handle;
     int intr_at_halt;		/* SR_BL ignored during sleep */
     memory_content *movcal_backup;
     memory_content **movcal_backup_tail;
 } CPUSH4State;

 CPUSH4State *cpu_sh4_init(const char *cpu_model);
 int cpu_sh4_exec(CPUSH4State * s);
 int cpu_sh4_signal_handler(int host_signum, void *pinfo,
                            void *puc);
 int cpu_sh4_handle_mmu_fault(CPUSH4State * env, target_ulong address, int rw,
 			     int mmu_idx, int is_softmmu);
 void do_interrupt(CPUSH4State * env);

 void sh4_cpu_list(FILE *f, int (*cpu_fprintf)(FILE *f, const char *fmt, ...));
 void cpu_sh4_write_mmaped_utlb_addr(CPUSH4State *s, target_phys_addr_t addr,
 				    uint32_t mem_value);

 int cpu_sh4_is_cached(CPUSH4State * env, target_ulong addr);

 static inline void cpu_set_tls(CPUSH4State *env, target_ulong newtls)
 {
   env->gbr = newtls;
 }

 void cpu_load_tlb(CPUSH4State * env);

 #include "softfloat.h"

 #define cpu_init cpu_sh4_init
 #define cpu_exec cpu_sh4_exec
 #define cpu_gen_code cpu_sh4_gen_code
 #define cpu_signal_handler cpu_sh4_signal_handler
 #define cpu_list sh4_cpu_list

 /* MMU modes definitions */
 #define MMU_MODE0_SUFFIX _kernel
 #define MMU_MODE1_SUFFIX _user
 #define MMU_USER_IDX 1
 static inline int cpu_mmu_index (CPUState *env)
 {
     return (env->sr & SR_MD) == 0 ? 1 : 0;
 }

 #if defined(CONFIG_USER_ONLY)
 static inline void cpu_clone_regs(CPUState *env, target_ulong newsp)
 {
     if (newsp)
         env->gregs[15] = newsp;
     env->gregs[0] = 0;
 }
 #endif

 #include "cpu-all.h"
 #include "exec-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_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 void cpu_pc_from_tb(CPUState *env, TranslationBlock *tb)
 {
     env->pc = tb->pc;
     env->flags = tb->flags;
 }

 #define TB_FLAG_PENDING_MOVCA  (1 << 4)

 static inline void cpu_get_tb_cpu_state(CPUState *env, target_ulong *pc,
                                         target_ulong *cs_base, int *flags)
 {
     *pc = env->pc;
     *cs_base = 0;
     *flags = (env->flags & (DELAY_SLOT | DELAY_SLOT_CONDITIONAL
                     | DELAY_SLOT_TRUE | DELAY_SLOT_CLEARME))   /* Bits  0- 3 */
             | (env->fpscr & (FPSCR_FR | FPSCR_SZ | FPSCR_PR))  /* Bits 19-21 */
             | (env->sr & (SR_MD | SR_RB))                      /* Bits 29-30 */
             | (env->sr & SR_FD)                                /* Bit 15 */
             | (env->movcal_backup ? TB_FLAG_PENDING_MOVCA : 0); /* Bit 4 */
 }

 #endif				/* _CPU_SH4_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 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 _CPU_SH4_H
	#define _CPU_SH4_H

	#include "config.h"

	#define TARGET_LONG_BITS 32
	#define TARGET_HAS_ICE 1

	#define ELF_MACHINE EM_SH

	/* 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 CPUState struct CPUSH4State

	#include "cpu-defs.h"

	#include "softfloat.h"

	#define TARGET_PAGE_BITS 12 /* 4k XXXXX */

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

	#define FPSCR_FR (1 << 21)
	#define FPSCR_SZ (1 << 20)
	#define FPSCR_PR (1 << 19)
	#define FPSCR_DN (1 << 18)
	#define DELAY_SLOT (1 << 0)
	#define DELAY_SLOT_CONDITIONAL (1 << 1)
	#define DELAY_SLOT_TRUE (1 << 2)
	#define DELAY_SLOT_CLEARME (1 << 3)
	/* The dynamic value of the DELAY_SLOT_TRUE flag determines whether the jump
	* after the delay slot should be taken or not. It is calculated from SR_T.
	*
	* It is unclear if it is permitted to modify the SR_T flag in a delay slot.
	* The use of DELAY_SLOT_TRUE flag makes us accept such SR_T modification.
	*/

	/* XXXXX The structure could be made more compact */
	typedef struct tlb_t {
	uint8_t asid; /* address space identifier */
	uint32_t vpn; /* virtual page number */
	uint8_t v; /* validity */
	uint32_t ppn; /* physical page number */
	uint8_t sz; /* page size */
	uint32_t size; /* cached page size in bytes */
	uint8_t sh; /* share status */
	uint8_t c; /* cacheability */
	uint8_t pr; /* protection key */
	uint8_t d; /* dirty */
	uint8_t wt; /* write through */
	uint8_t sa; /* space attribute (PCMCIA) */
	uint8_t tc; /* timing control */
	} tlb_t;

	#define UTLB_SIZE 64
	#define ITLB_SIZE 4

	#define NB_MMU_MODES 2

	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 {
	int id; /* CPU model */

	uint32_t flags; /* general execution flags */
	uint32_t gregs[24]; /* general registers */
	float32 fregs[32]; /* floating point registers */
	uint32_t sr; /* 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 jump */
	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;

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

	/* 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 */

	uint32_t pvr; /* Processor Version Register */
	uint32_t prr; /* Processor Revision Register */
	uint32_t cvr; /* Cache Version Register */

	uint32_t ldst;

	CPU_COMMON tlb_t utlb[UTLB_SIZE]; /* unified translation table */
	tlb_t itlb[ITLB_SIZE]; /* instruction translation table */
	void *intc_handle;
	int intr_at_halt; /* SR_BL ignored during sleep */
	memory_content *movcal_backup;
	memory_content **movcal_backup_tail;
	} CPUSH4State;

	CPUSH4State cpu_sh4_init(const char cpu_model);
	int cpu_sh4_exec(CPUSH4State * s);
	int cpu_sh4_signal_handler(int host_signum, void *pinfo,
	void *puc);
	int cpu_sh4_handle_mmu_fault(CPUSH4State * env, target_ulong address, int rw,
	int mmu_idx, int is_softmmu);
	void do_interrupt(CPUSH4State * env);

	void sh4_cpu_list(FILE f, int (cpu_fprintf)(FILE f, const char fmt, ...));
	void cpu_sh4_write_mmaped_utlb_addr(CPUSH4State *s, target_phys_addr_t addr,
	uint32_t mem_value);

	int cpu_sh4_is_cached(CPUSH4State * env, target_ulong addr);

	static inline void cpu_set_tls(CPUSH4State *env, target_ulong newtls)
	{
	env->gbr = newtls;
	}

	void cpu_load_tlb(CPUSH4State * env);

	#include "softfloat.h"

	#define cpu_init cpu_sh4_init
	#define cpu_exec cpu_sh4_exec
	#define cpu_gen_code cpu_sh4_gen_code
	#define cpu_signal_handler cpu_sh4_signal_handler
	#define cpu_list sh4_cpu_list

	/* MMU modes definitions */
	#define MMU_MODE0_SUFFIX _kernel
	#define MMU_MODE1_SUFFIX _user
	#define MMU_USER_IDX 1
	static inline int cpu_mmu_index (CPUState *env)
	{
	return (env->sr & SR_MD) == 0 ? 1 : 0;
	}

	#if defined(CONFIG_USER_ONLY)
	static inline void cpu_clone_regs(CPUState *env, target_ulong newsp)
	{
	if (newsp)
	env->gregs[15] = newsp;
	env->gregs[0] = 0;
	}
	#endif

	#include "cpu-all.h"
	#include "exec-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_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 void cpu_pc_from_tb(CPUState env, TranslationBlock tb)
	{
	env->pc = tb->pc;
	env->flags = tb->flags;
	}

	#define TB_FLAG_PENDING_MOVCA (1 << 4)

	static inline void cpu_get_tb_cpu_state(CPUState env, target_ulong pc,
	target_ulong cs_base, int flags)
	{
	*pc = env->pc;
	*cs_base = 0;
	*flags = (env->flags & (DELAY_SLOT \| DELAY_SLOT_CONDITIONAL
	\| DELAY_SLOT_TRUE \| DELAY_SLOT_CLEARME)) /* Bits 0- 3 */
	\| (env->fpscr & (FPSCR_FR \| FPSCR_SZ \| FPSCR_PR)) /* Bits 19-21 */
	\| (env->sr & (SR_MD \| SR_RB)) /* Bits 29-30 */
	\| (env->sr & SR_FD) /* Bit 15 */
	\| (env->movcal_backup ? TB_FLAG_PENDING_MOVCA : 0); /* Bit 4 */
	}

	#endif /* _CPU_SH4_H */