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/*
* 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 TARGET_PHYS_ADDR_SPACE_BITS 32
#define TARGET_VIRT_ADDR_SPACE_BITS 32

#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.
*/

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 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);
#define cpu_handle_mmu_fault cpu_sh4_handle_mmu_fault
void do_interrupt(CPUSH4State * env);

void sh4_cpu_list(FILE *f, int (*cpu_fprintf)(FILE *f, const char *fmt, ...));
#if !defined(CONFIG_USER_ONLY)
void cpu_sh4_invalidate_tlb(CPUSH4State *s);
void cpu_sh4_write_mmaped_utlb_addr(CPUSH4State *s, target_phys_addr_t addr,
uint32_t mem_value);
#endif

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"

/* 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)

#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 */
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