Archipelago » qemu

#ifndef CPU_SPARC_H

#define CPU_SPARC_H

#include "config.h"

#if !defined(TARGET_SPARC64)

#define TARGET_LONG_BITS 32

#define TARGET_FPREGS 32

#define TARGET_PAGE_BITS 12 /* 4k */

#else

#define TARGET_LONG_BITS 64

#define TARGET_FPREGS 64

#define TARGET_PAGE_BITS 13 /* 8k */

#endif

#define CPUState struct CPUSPARCState

#include "cpu-defs.h"

#include "softfloat.h"

#define TARGET_HAS_ICE 1

#if !defined(TARGET_SPARC64)

#define ELF_MACHINE     EM_SPARC

#else

#define ELF_MACHINE     EM_SPARCV9

#endif

/*#define EXCP_INTERRUPT 0x100*/

/* trap definitions */

#ifndef TARGET_SPARC64

#define TT_TFAULT   0x01

#define TT_ILL_INSN 0x02

#define TT_PRIV_INSN 0x03

#define TT_NFPU_INSN 0x04

#define TT_WIN_OVF  0x05

#define TT_WIN_UNF  0x06

#define TT_UNALIGNED 0x07

#define TT_FP_EXCP  0x08

#define TT_DFAULT   0x09

#define TT_TOVF     0x0a

#define TT_EXTINT   0x10

#define TT_CODE_ACCESS 0x21

#define TT_UNIMP_FLUSH 0x25

#define TT_DATA_ACCESS 0x29

#define TT_DIV_ZERO 0x2a

#define TT_NCP_INSN 0x24

#define TT_TRAP     0x80

#else

#define TT_POWER_ON_RESET 0x01

#define TT_TFAULT   0x08

#define TT_CODE_ACCESS 0x0a

#define TT_ILL_INSN 0x10

#define TT_UNIMP_FLUSH TT_ILL_INSN

#define TT_PRIV_INSN 0x11

#define TT_NFPU_INSN 0x20

#define TT_FP_EXCP  0x21

#define TT_TOVF     0x23

#define TT_CLRWIN   0x24

#define TT_DIV_ZERO 0x28

#define TT_DFAULT   0x30

#define TT_DATA_ACCESS 0x32

#define TT_UNALIGNED 0x34

#define TT_PRIV_ACT 0x37

#define TT_EXTINT   0x40

#define TT_IVEC     0x60

#define TT_TMISS    0x64

#define TT_DMISS    0x68

#define TT_DPROT    0x6c

#define TT_SPILL    0x80

#define TT_FILL     0xc0

#define TT_WOTHER   0x10

#define TT_TRAP     0x100

#endif

#define PSR_NEG_SHIFT 23

#define PSR_NEG   (1 << PSR_NEG_SHIFT)

#define PSR_ZERO_SHIFT 22

#define PSR_ZERO  (1 << PSR_ZERO_SHIFT)

#define PSR_OVF_SHIFT 21

#define PSR_OVF   (1 << PSR_OVF_SHIFT)

#define PSR_CARRY_SHIFT 20

#define PSR_CARRY (1 << PSR_CARRY_SHIFT)

#define PSR_ICC   (PSR_NEG|PSR_ZERO|PSR_OVF|PSR_CARRY)

#define PSR_EF    (1<<12)

#define PSR_PIL   0xf00

#define PSR_S     (1<<7)

#define PSR_PS    (1<<6)

#define PSR_ET    (1<<5)

#define PSR_CWP   0x1f

#define CC_SRC (env->cc_src)

#define CC_SRC2 (env->cc_src2)

#define CC_DST (env->cc_dst)

#define CC_OP  (env->cc_op)

enum {

    CC_OP_DYNAMIC, /* must use dynamic code to get cc_op */

    CC_OP_FLAGS,   /* all cc are back in status register */

    CC_OP_DIV,     /* modify N, Z and V, C = 0*/

    CC_OP_ADD,     /* modify all flags, CC_DST = res, CC_SRC = src1 */

    CC_OP_ADDX,    /* modify all flags, CC_DST = res, CC_SRC = src1 */

    CC_OP_TADD,    /* modify all flags, CC_DST = res, CC_SRC = src1 */

    CC_OP_TADDTV,  /* modify all flags except V, CC_DST = res, CC_SRC = src1 */

    CC_OP_SUB,     /* modify all flags, CC_DST = res, CC_SRC = src1 */

    CC_OP_SUBX,    /* modify all flags, CC_DST = res, CC_SRC = src1 */

    CC_OP_TSUB,    /* modify all flags, CC_DST = res, CC_SRC = src1 */

    CC_OP_TSUBTV,  /* modify all flags except V, CC_DST = res, CC_SRC = src1 */

    CC_OP_LOGIC,   /* modify N and Z, C = V = 0, CC_DST = res */

    CC_OP_NB,

};

/* Trap base register */

#define TBR_BASE_MASK 0xfffff000

#if defined(TARGET_SPARC64)

#define PS_TCT   (1<<12) /* UA2007, impl.dep. trap on control transfer */

#define PS_IG    (1<<11) /* v9, zero on UA2007 */

#define PS_MG    (1<<10) /* v9, zero on UA2007 */

#define PS_CLE   (1<<9) /* UA2007 */

#define PS_TLE   (1<<8) /* UA2007 */

#define PS_RMO   (1<<7)

#define PS_RED   (1<<5) /* v9, zero on UA2007 */

#define PS_PEF   (1<<4) /* enable fpu */

#define PS_AM    (1<<3) /* address mask */

#define PS_PRIV  (1<<2)

#define PS_IE    (1<<1)

#define PS_AG    (1<<0) /* v9, zero on UA2007 */

#define FPRS_FEF (1<<2)

#define HS_PRIV  (1<<2)

#endif

/* Fcc */

#define FSR_RD1        (1ULL << 31)

#define FSR_RD0        (1ULL << 30)

#define FSR_RD_MASK    (FSR_RD1 | FSR_RD0)

#define FSR_RD_NEAREST 0

#define FSR_RD_ZERO    FSR_RD0

#define FSR_RD_POS     FSR_RD1

#define FSR_RD_NEG     (FSR_RD1 | FSR_RD0)

#define FSR_NVM   (1ULL << 27)

#define FSR_OFM   (1ULL << 26)

#define FSR_UFM   (1ULL << 25)

#define FSR_DZM   (1ULL << 24)

#define FSR_NXM   (1ULL << 23)

#define FSR_TEM_MASK (FSR_NVM | FSR_OFM | FSR_UFM | FSR_DZM | FSR_NXM)

#define FSR_NVA   (1ULL << 9)

#define FSR_OFA   (1ULL << 8)

#define FSR_UFA   (1ULL << 7)

#define FSR_DZA   (1ULL << 6)

#define FSR_NXA   (1ULL << 5)

#define FSR_AEXC_MASK (FSR_NVA | FSR_OFA | FSR_UFA | FSR_DZA | FSR_NXA)

#define FSR_NVC   (1ULL << 4)

#define FSR_OFC   (1ULL << 3)

#define FSR_UFC   (1ULL << 2)

#define FSR_DZC   (1ULL << 1)

#define FSR_NXC   (1ULL << 0)

#define FSR_CEXC_MASK (FSR_NVC | FSR_OFC | FSR_UFC | FSR_DZC | FSR_NXC)

#define FSR_FTT2   (1ULL << 16)

#define FSR_FTT1   (1ULL << 15)

#define FSR_FTT0   (1ULL << 14)

//gcc warns about constant overflow for ~FSR_FTT_MASK

//#define FSR_FTT_MASK (FSR_FTT2 | FSR_FTT1 | FSR_FTT0)

#ifdef TARGET_SPARC64

#define FSR_FTT_NMASK      0xfffffffffffe3fffULL

#define FSR_FTT_CEXC_NMASK 0xfffffffffffe3fe0ULL

#define FSR_LDFSR_OLDMASK  0x0000003f000fc000ULL

#define FSR_LDXFSR_MASK    0x0000003fcfc00fffULL

#define FSR_LDXFSR_OLDMASK 0x00000000000fc000ULL

#else

#define FSR_FTT_NMASK      0xfffe3fffULL

#define FSR_FTT_CEXC_NMASK 0xfffe3fe0ULL

#define FSR_LDFSR_OLDMASK  0x000fc000ULL

#endif

#define FSR_LDFSR_MASK     0xcfc00fffULL

#define FSR_FTT_IEEE_EXCP (1ULL << 14)

#define FSR_FTT_UNIMPFPOP (3ULL << 14)

#define FSR_FTT_SEQ_ERROR (4ULL << 14)

#define FSR_FTT_INVAL_FPR (6ULL << 14)

#define FSR_FCC1_SHIFT 11

#define FSR_FCC1  (1ULL << FSR_FCC1_SHIFT)

#define FSR_FCC0_SHIFT 10

#define FSR_FCC0  (1ULL << FSR_FCC0_SHIFT)

/* MMU */

#define MMU_E     (1<<0)

#define MMU_NF    (1<<1)

#define PTE_ENTRYTYPE_MASK 3

#define PTE_ACCESS_MASK    0x1c

#define PTE_ACCESS_SHIFT   2

#define PTE_PPN_SHIFT      7

#define PTE_ADDR_MASK      0xffffff00

#define PG_ACCESSED_BIT 5

#define PG_MODIFIED_BIT 6

#define PG_CACHE_BIT    7

#define PG_ACCESSED_MASK (1 << PG_ACCESSED_BIT)

#define PG_MODIFIED_MASK (1 << PG_MODIFIED_BIT)

#define PG_CACHE_MASK    (1 << PG_CACHE_BIT)

/* 3 <= NWINDOWS <= 32. */

#define MIN_NWINDOWS 3

#define MAX_NWINDOWS 32

#if !defined(TARGET_SPARC64)

#define NB_MMU_MODES 2

#else

#define NB_MMU_MODES 3

typedef struct trap_state {

    uint64_t tpc;

    uint64_t tnpc;

    uint64_t tstate;

    uint32_t tt;

} trap_state;

#endif

typedef struct sparc_def_t {

    const char *name;

    target_ulong iu_version;

    uint32_t fpu_version;

    uint32_t mmu_version;

    uint32_t mmu_bm;

    uint32_t mmu_ctpr_mask;

    uint32_t mmu_cxr_mask;

    uint32_t mmu_sfsr_mask;

    uint32_t mmu_trcr_mask;

    uint32_t mxcc_version;

    uint32_t features;

    uint32_t nwindows;

    uint32_t maxtl;

} sparc_def_t;

#define CPU_FEATURE_FLOAT    (1 << 0)

#define CPU_FEATURE_FLOAT128 (1 << 1)

#define CPU_FEATURE_SWAP     (1 << 2)

#define CPU_FEATURE_MUL      (1 << 3)

#define CPU_FEATURE_DIV      (1 << 4)

#define CPU_FEATURE_FLUSH    (1 << 5)

#define CPU_FEATURE_FSQRT    (1 << 6)

#define CPU_FEATURE_FMUL     (1 << 7)

#define CPU_FEATURE_VIS1     (1 << 8)

#define CPU_FEATURE_VIS2     (1 << 9)

#define CPU_FEATURE_FSMULD   (1 << 10)

#define CPU_FEATURE_HYPV     (1 << 11)

#define CPU_FEATURE_CMT      (1 << 12)

#define CPU_FEATURE_GL       (1 << 13)

#ifndef TARGET_SPARC64

#define CPU_DEFAULT_FEATURES (CPU_FEATURE_FLOAT | CPU_FEATURE_SWAP |  \

                              CPU_FEATURE_MUL | CPU_FEATURE_DIV |     \

                              CPU_FEATURE_FLUSH | CPU_FEATURE_FSQRT | \

                              CPU_FEATURE_FMUL | CPU_FEATURE_FSMULD)

#else

#define CPU_DEFAULT_FEATURES (CPU_FEATURE_FLOAT | CPU_FEATURE_SWAP |  \

                              CPU_FEATURE_MUL | CPU_FEATURE_DIV |     \

                              CPU_FEATURE_FLUSH | CPU_FEATURE_FSQRT | \

                              CPU_FEATURE_FMUL | CPU_FEATURE_VIS1 |   \

                              CPU_FEATURE_VIS2 | CPU_FEATURE_FSMULD)

enum {

    mmu_us_12, // Ultrasparc < III (64 entry TLB)

    mmu_us_3,  // Ultrasparc III (512 entry TLB)

    mmu_us_4,  // Ultrasparc IV (several TLBs, 32 and 256MB pages)

    mmu_sun4v, // T1, T2

};

#endif

#define TTE_VALID_BIT       (1ULL << 63)

#define TTE_USED_BIT        (1ULL << 41)

#define TTE_LOCKED_BIT      (1ULL <<  6)

#define TTE_GLOBAL_BIT      (1ULL <<  0)

#define TTE_IS_VALID(tte)   ((tte) & TTE_VALID_BIT)

#define TTE_IS_USED(tte)    ((tte) & TTE_USED_BIT)

#define TTE_IS_LOCKED(tte)  ((tte) & TTE_LOCKED_BIT)

#define TTE_IS_GLOBAL(tte)  ((tte) & TTE_GLOBAL_BIT)

#define TTE_SET_USED(tte)   ((tte) |= TTE_USED_BIT)

#define TTE_SET_UNUSED(tte) ((tte) &= ~TTE_USED_BIT)

typedef struct SparcTLBEntry {

    uint64_t tag;

    uint64_t tte;

} SparcTLBEntry;

typedef struct CPUSPARCState {

    target_ulong gregs[8]; /* general registers */

    target_ulong *regwptr; /* pointer to current register window */

    target_ulong pc;       /* program counter */

    target_ulong npc;      /* next program counter */

    target_ulong y;        /* multiply/divide register */

    /* emulator internal flags handling */

    target_ulong cc_src, cc_src2;

    target_ulong cc_dst;

    uint32_t cc_op;

    target_ulong t0, t1; /* temporaries live across basic blocks */

    target_ulong cond; /* conditional branch result (XXX: save it in a

                          temporary register when possible) */

    uint32_t psr;      /* processor state register */

    target_ulong fsr;      /* FPU state register */

    float32 fpr[TARGET_FPREGS];  /* floating point registers */

    uint32_t cwp;      /* index of current register window (extracted

                          from PSR) */

#if !defined(TARGET_SPARC64) || defined(TARGET_ABI32)

    uint32_t wim;      /* window invalid mask */

#endif

    target_ulong tbr;  /* trap base register */

    int      psrs;     /* supervisor mode (extracted from PSR) */

    int      psrps;    /* previous supervisor mode */

#if !defined(TARGET_SPARC64)

    int      psret;    /* enable traps */

#endif

    uint32_t psrpil;   /* interrupt blocking level */

    uint32_t pil_in;   /* incoming interrupt level bitmap */

    int      psref;    /* enable fpu */

    target_ulong version;

    int interrupt_index;

    uint32_t nwindows;

    /* NOTE: we allow 8 more registers to handle wrapping */

    target_ulong regbase[MAX_NWINDOWS * 16 + 8];

    CPU_COMMON

    /* MMU regs */

#if defined(TARGET_SPARC64)

    uint64_t lsu;

#define DMMU_E 0x8

#define IMMU_E 0x4

    //typedef struct SparcMMU

    union {

        uint64_t immuregs[16];

        struct {

            uint64_t tsb_tag_target;

            uint64_t unused_mmu_primary_context;   // use DMMU

            uint64_t unused_mmu_secondary_context; // use DMMU

            uint64_t sfsr;

            uint64_t sfar;

            uint64_t tsb;

            uint64_t tag_access;

        } immu;

    };

    union {

        uint64_t dmmuregs[16];

        struct {

            uint64_t tsb_tag_target;

            uint64_t mmu_primary_context;

            uint64_t mmu_secondary_context;

            uint64_t sfsr;

            uint64_t sfar;

            uint64_t tsb;

            uint64_t tag_access;

        } dmmu;

    };

    SparcTLBEntry itlb[64];

    SparcTLBEntry dtlb[64];

    uint32_t mmu_version;

#else

    uint32_t mmuregs[32];

    uint64_t mxccdata[4];

    uint64_t mxccregs[8];

    uint64_t mmubpregs[4];

    uint64_t prom_addr;

#endif

    /* temporary float registers */

    float64 dt0, dt1;

    float128 qt0, qt1;

    float_status fp_status;

#if defined(TARGET_SPARC64)

#define MAXTL_MAX 8

#define MAXTL_MASK (MAXTL_MAX - 1)

    trap_state ts[MAXTL_MAX];

    uint32_t xcc;               /* Extended integer condition codes */

    uint32_t asi;

    uint32_t pstate;

    uint32_t tl;

    uint32_t maxtl;

    uint32_t cansave, canrestore, otherwin, wstate, cleanwin;

    uint64_t agregs[8]; /* alternate general registers */

    uint64_t bgregs[8]; /* backup for normal global registers */

    uint64_t igregs[8]; /* interrupt general registers */

    uint64_t mgregs[8]; /* mmu general registers */

    uint64_t fprs;

    uint64_t tick_cmpr, stick_cmpr;

    void *tick, *stick;

    uint64_t gsr;

    uint32_t gl; // UA2005

    /* UA 2005 hyperprivileged registers */

    uint64_t hpstate, htstate[MAXTL_MAX], hintp, htba, hver, hstick_cmpr, ssr;

    void *hstick; // UA 2005

    uint32_t softint;

#define SOFTINT_TIMER   1

#define SOFTINT_STIMER  (1 << 16)

#endif

    sparc_def_t *def;

} CPUSPARCState;

/* helper.c */

CPUSPARCState *cpu_sparc_init(const char *cpu_model);

void cpu_sparc_set_id(CPUSPARCState *env, unsigned int cpu);

void sparc_cpu_list (FILE *f, int (*cpu_fprintf)(FILE *f, const char *fmt,

                                                 ...));

void cpu_lock(void);

void cpu_unlock(void);

int cpu_sparc_handle_mmu_fault(CPUSPARCState *env1, target_ulong address, int rw,

                               int mmu_idx, int is_softmmu);

#define cpu_handle_mmu_fault cpu_sparc_handle_mmu_fault

target_ulong mmu_probe(CPUSPARCState *env, target_ulong address, int mmulev);

void dump_mmu(CPUSPARCState *env);

/* translate.c */

void gen_intermediate_code_init(CPUSPARCState *env);

/* cpu-exec.c */

int cpu_sparc_exec(CPUSPARCState *s);

#if !defined (TARGET_SPARC64)

#define GET_PSR(env) (env->version | (env->psr & PSR_ICC) |             \

                      (env->psref? PSR_EF : 0) |                        \

                      (env->psrpil << 8) |                              \

                      (env->psrs? PSR_S : 0) |                          \

                      (env->psrps? PSR_PS : 0) |                        \

                      (env->psret? PSR_ET : 0) | env->cwp)

#else

#define GET_PSR(env) (env->version | (env->psr & PSR_ICC) |             \

                      (env->psref? PSR_EF : 0) |                        \

                      (env->psrpil << 8) |                              \

                      (env->psrs? PSR_S : 0) |                          \

                      (env->psrps? PSR_PS : 0) |                        \

                      env->cwp)

#endif

#ifndef NO_CPU_IO_DEFS

static inline int cpu_cwp_inc(CPUSPARCState *env1, int cwp)

{

    if (unlikely(cwp >= env1->nwindows))

        cwp -= env1->nwindows;

    return cwp;

}

static inline int cpu_cwp_dec(CPUSPARCState *env1, int cwp)

{

    if (unlikely(cwp < 0))

        cwp += env1->nwindows;

    return cwp;

}

#endif

static inline void memcpy32(target_ulong *dst, const target_ulong *src)

{

    dst[0] = src[0];

    dst[1] = src[1];

    dst[2] = src[2];

    dst[3] = src[3];

    dst[4] = src[4];

    dst[5] = src[5];

    dst[6] = src[6];

    dst[7] = src[7];

}

static inline void cpu_set_cwp(CPUSPARCState *env1, int new_cwp)

{

    /* put the modified wrap registers at their proper location */

    if (env1->cwp == env1->nwindows - 1)

        memcpy32(env1->regbase, env1->regbase + env1->nwindows * 16);

    env1->cwp = new_cwp;

    /* put the wrap registers at their temporary location */

    if (new_cwp == env1->nwindows - 1)

        memcpy32(env1->regbase + env1->nwindows * 16, env1->regbase);

    env1->regwptr = env1->regbase + (new_cwp * 16);

}

/* sun4m.c, sun4u.c */

void cpu_check_irqs(CPUSPARCState *env);

static inline void PUT_PSR(CPUSPARCState *env1, target_ulong val)

{

    env1->psr = val & PSR_ICC;

    env1->psref = (val & PSR_EF)? 1 : 0;

    env1->psrpil = (val & PSR_PIL) >> 8;

#if ((!defined (TARGET_SPARC64)) && !defined(CONFIG_USER_ONLY))

    cpu_check_irqs(env1);

#endif

    env1->psrs = (val & PSR_S)? 1 : 0;

    env1->psrps = (val & PSR_PS)? 1 : 0;

#if !defined (TARGET_SPARC64)

    env1->psret = (val & PSR_ET)? 1 : 0;

#endif

    cpu_set_cwp(env1, val & PSR_CWP);

    env1->cc_op = CC_OP_FLAGS;

}

#ifdef TARGET_SPARC64

#define GET_CCR(env) (((env->xcc >> 20) << 4) | ((env->psr & PSR_ICC) >> 20))

#define PUT_CCR(env, val) do { int _tmp = val;                          \

        env->xcc = (_tmp >> 4) << 20;                                   \

        env->psr = (_tmp & 0xf) << 20;                                  \

        CC_OP = CC_OP_FLAGS;                                            \

    } while (0)

#define GET_CWP64(env) (env->nwindows - 1 - (env)->cwp)

#ifndef NO_CPU_IO_DEFS

static inline void PUT_CWP64(CPUSPARCState *env1, int cwp)

{

    if (unlikely(cwp >= env1->nwindows || cwp < 0))

        cwp = 0;

    cpu_set_cwp(env1, env1->nwindows - 1 - cwp);

}

#endif

#endif

/* cpu-exec.c */

void do_unassigned_access(target_phys_addr_t addr, int is_write, int is_exec,

                          int is_asi, int size);

int cpu_sparc_signal_handler(int host_signum, void *pinfo, void *puc);

#define cpu_init cpu_sparc_init

#define cpu_exec cpu_sparc_exec

#define cpu_gen_code cpu_sparc_gen_code

#define cpu_signal_handler cpu_sparc_signal_handler

#define cpu_list sparc_cpu_list

#define CPU_SAVE_VERSION 5

/* MMU modes definitions */

#define MMU_MODE0_SUFFIX _user

#define MMU_MODE1_SUFFIX _kernel

#ifdef TARGET_SPARC64

#define MMU_MODE2_SUFFIX _hypv

#endif

#define MMU_USER_IDX   0

#define MMU_KERNEL_IDX 1

#define MMU_HYPV_IDX   2

static inline int cpu_mmu_index(CPUState *env1)

{

#if defined(CONFIG_USER_ONLY)

    return MMU_USER_IDX;

#elif !defined(TARGET_SPARC64)

    return env1->psrs;

#else

    if (!env1->psrs)

        return MMU_USER_IDX;

    else if ((env1->hpstate & HS_PRIV) == 0)

        return MMU_KERNEL_IDX;

    else

        return MMU_HYPV_IDX;

#endif

}

static inline int cpu_fpu_enabled(CPUState *env1)

{

#if defined(CONFIG_USER_ONLY)

    return 1;

#elif !defined(TARGET_SPARC64)

    return env1->psref;

#else

    return ((env1->pstate & PS_PEF) != 0) && ((env1->fprs & FPRS_FEF) != 0);

#endif

}

#if defined(CONFIG_USER_ONLY)

static inline void cpu_clone_regs(CPUState *env, target_ulong newsp)

{

    if (newsp)

        env->regwptr[22] = newsp;

    env->regwptr[0] = 0;

    /* FIXME: Do we also need to clear CF?  */

    /* XXXXX */

    printf ("HELPME: %s:%d\n", __FILE__, __LINE__);

}

#endif

#include "cpu-all.h"

#include "exec-all.h"

#ifdef TARGET_SPARC64

/* sun4u.c */

void cpu_tick_set_count(void *opaque, uint64_t count);

uint64_t cpu_tick_get_count(void *opaque);

void cpu_tick_set_limit(void *opaque, uint64_t limit);

trap_state* cpu_tsptr(CPUState* env);

#endif

static inline void cpu_pc_from_tb(CPUState *env, TranslationBlock *tb)

{

    env->pc = tb->pc;

    env->npc = tb->cs_base;

}

static inline void cpu_get_tb_cpu_state(CPUState *env, target_ulong *pc,

                                        target_ulong *cs_base, int *flags)

{

    *pc = env->pc;

    *cs_base = env->npc;

#ifdef TARGET_SPARC64

    // AM . Combined FPU enable bits . PRIV . DMMU enabled . IMMU enabled

    *flags = ((env->pstate & PS_AM) << 2)

        | (((env->pstate & PS_PEF) >> 1) | ((env->fprs & FPRS_FEF) << 2))

        | (env->pstate & PS_PRIV) | ((env->lsu & (DMMU_E | IMMU_E)) >> 2);

#else

    // FPU enable . Supervisor

    *flags = (env->psref << 4) | env->psrs;

#endif

}

#endif