[net-next-2.6.git] / arch / m68k / include / asm / segment_mm.h

#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 */
Commit	Line	Data
1da177e4 LT	1	#ifndef _M68K_SEGMENT_H
	2	#define _M68K_SEGMENT_H
	3
	4	/* define constants */
	5	/* Address spaces (FC0-FC2) */
	6	#define USER_DATA (1)
	7	#ifndef __USER_DS
	8	#define __USER_DS (USER_DATA)
	9	#endif
	10	#define USER_PROGRAM (2)
	11	#define SUPER_DATA (5)
	12	#ifndef __KERNEL_DS
	13	#define __KERNEL_DS (SUPER_DATA)
	14	#endif
	15	#define SUPER_PROGRAM (6)
	16	#define CPU_SPACE (7)
	17
	18	#ifndef __ASSEMBLY__
	19
	20	typedef struct {
	21	unsigned long seg;
	22	} mm_segment_t;
	23
	24	#define MAKE_MM_SEG(s) ((mm_segment_t) { (s) })
	25	#define USER_DS MAKE_MM_SEG(__USER_DS)
	26	#define KERNEL_DS MAKE_MM_SEG(__KERNEL_DS)
	27
	28	/*
	29	* Get/set the SFC/DFC registers for MOVES instructions
	30	*/
	31
	32	static inline mm_segment_t get_fs(void)
	33	{
	34	mm_segment_t _v;
	35	__asm__ ("movec %/dfc,%0":"=r" (_v.seg):);
	36
	37	return _v;
	38	}
	39
	40	static inline mm_segment_t get_ds(void)
	41	{
	42	/* return the supervisor data space code */
	43	return KERNEL_DS;
	44	}
	45
	46	static inline void set_fs(mm_segment_t val)
	47	{
	48	__asm__ __volatile__ ("movec %0,%/sfc\n\t"
	49	"movec %0,%/dfc\n\t"
	50	: /* no outputs */ : "r" (val.seg) : "memory");
	51	}
	52
	53	#define segment_eq(a,b) ((a).seg == (b).seg)
	54
	55	#endif /* __ASSEMBLY__ */
	56
	57	#endif /* _M68K_SEGMENT_H */