36 lines
879 B
C
36 lines
879 B
C
|
/* SPDX-License-Identifier: GPL-2.0 */
|
||
|
|
#ifndef __ASM_SH_SEGMENT_H
|
||
|
|
#define __ASM_SH_SEGMENT_H
|
||
|
|
|
||
|
|
#ifndef __ASSEMBLY__
|
||
|
|
|
||
|
|
typedef struct {
|
||
|
|
unsigned long seg;
|
||
|
|
} mm_segment_t;
|
||
|
|
|
||
|
|
#define MAKE_MM_SEG(s) ((mm_segment_t) { (s) })
|
||
|
|
|
||
|
|
/*
|
||
|
|
* The fs value determines whether argument validity checking should be
|
||
|
|
* performed or not. If get_fs() == USER_DS, checking is performed, with
|
||
|
|
* get_fs() == KERNEL_DS, checking is bypassed.
|
||
|
|
*
|
||
|
|
* For historical reasons, these macros are grossly misnamed.
|
||
|
|
*/
|
||
|
|
#define KERNEL_DS MAKE_MM_SEG(0xFFFFFFFFUL)
|
||
|
|
#ifdef CONFIG_MMU
|
||
|
|
#define USER_DS MAKE_MM_SEG(PAGE_OFFSET)
|
||
|
|
#else
|
||
|
|
#define USER_DS KERNEL_DS
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#define segment_eq(a, b) ((a).seg == (b).seg)
|
||
|
|
|
||
|
|
#define get_ds() (KERNEL_DS)
|
||
|
|
|
||
|
|
#define get_fs() (current_thread_info()->addr_limit)
|
||
|
|
#define set_fs(x) (current_thread_info()->addr_limit = (x))
|
||
|
|
|
||
|
|
#endif /* __ASSEMBLY__ */
|
||
|
|
#endif /* __ASM_SH_SEGMENT_H */
|