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Linus Torvalds1da177e2005-04-16 15:20:36 -07001#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
20typedef 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
32static inline mm_segment_t get_fs(void)
33{
34 return USER_DS;
35}
36
37static inline mm_segment_t get_ds(void)
38{
39 /* return the supervisor data space code */
40 return KERNEL_DS;
41}
42
43static inline void set_fs(mm_segment_t val)
44{
45}
46
47#define segment_eq(a,b) ((a).seg == (b).seg)
48
49#endif /* __ASSEMBLY__ */
50
51#endif /* _M68K_SEGMENT_H */