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#ifndef _M68K_SEGMENT_H

#define _M68K_SEGMENT_H

/* define constants */

/* Address spaces (FC0-FC2) */

#define USER_DATA     (1)

#ifndef __USER_DS

#define __USER_DS     (USER_DATA)

#endif

#define USER_PROGRAM  (2)

#define SUPER_DATA    (5)

#ifndef __KERNEL_DS

#define __KERNEL_DS   (SUPER_DATA)

#endif

#define SUPER_PROGRAM (6)

#define CPU_SPACE     (7)

#ifndef __ASSEMBLY__

typedef struct {

        unsigned long seg;

} mm_segment_t;

#define MAKE_MM_SEG(s)  ((mm_segment_t) { (s) })

#define USER_DS         MAKE_MM_SEG(__USER_DS)

#define KERNEL_DS       MAKE_MM_SEG(__KERNEL_DS)

/*

 * Get/set the SFC/DFC registers for MOVES instructions

 */

static inline mm_segment_t get_fs(void)

{

        mm_segment_t _v;

        __asm__ ("movec %/dfc,%0":"=r" (_v.seg):);

        return _v;

}

static inline mm_segment_t get_ds(void)

{

    /* return the supervisor data space code */

    return KERNEL_DS;

}

static inline void set_fs(mm_segment_t val)

{

        __asm__ __volatile__ ("movec %0,%/sfc\n\t"

                              "movec %0,%/dfc\n\t"

                              : /* no outputs */ : "r" (val.seg) : "memory");

}

#define segment_eq(a,b) ((a).seg == (b).seg)

#endif /* __ASSEMBLY__ */

#endif /* _M68K_SEGMENT_H */