diff options
Diffstat (limited to 'include/asm-frv/segment.h')
-rw-r--r-- | include/asm-frv/segment.h | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/include/asm-frv/segment.h b/include/asm-frv/segment.h new file mode 100644 index 000000000000..61222f00dfc1 --- /dev/null +++ b/include/asm-frv/segment.h | |||
@@ -0,0 +1,46 @@ | |||
1 | /* segment.h: MMU segment settings | ||
2 | * | ||
3 | * Copyright (C) 2003 Red Hat, Inc. All Rights Reserved. | ||
4 | * Written by David Howells (dhowells@redhat.com) | ||
5 | * | ||
6 | * This program is free software; you can redistribute it and/or | ||
7 | * modify it under the terms of the GNU General Public License | ||
8 | * as published by the Free Software Foundation; either version | ||
9 | * 2 of the License, or (at your option) any later version. | ||
10 | */ | ||
11 | |||
12 | #ifndef _ASM_SEGMENT_H | ||
13 | #define _ASM_SEGMENT_H | ||
14 | |||
15 | #include <linux/config.h> | ||
16 | |||
17 | #ifndef __ASSEMBLY__ | ||
18 | |||
19 | typedef struct { | ||
20 | unsigned long seg; | ||
21 | } mm_segment_t; | ||
22 | |||
23 | #define MAKE_MM_SEG(s) ((mm_segment_t) { (s) }) | ||
24 | |||
25 | #define KERNEL_DS MAKE_MM_SEG(0xdfffffffUL) | ||
26 | |||
27 | #ifdef CONFIG_MMU | ||
28 | #define USER_DS MAKE_MM_SEG(TASK_SIZE - 1) | ||
29 | #else | ||
30 | #define USER_DS KERNEL_DS | ||
31 | #endif | ||
32 | |||
33 | #define get_ds() (KERNEL_DS) | ||
34 | #define get_fs() (__current_thread_info->addr_limit) | ||
35 | #define segment_eq(a,b) ((a).seg == (b).seg) | ||
36 | #define __kernel_ds_p() segment_eq(get_fs(), KERNEL_DS) | ||
37 | #define get_addr_limit() (get_fs().seg) | ||
38 | |||
39 | #define set_fs(_x) \ | ||
40 | do { \ | ||
41 | __current_thread_info->addr_limit = (_x); \ | ||
42 | } while(0) | ||
43 | |||
44 | |||
45 | #endif /* __ASSEMBLY__ */ | ||
46 | #endif /* _ASM_SEGMENT_H */ | ||