Merge branch 'akpm' (patches from Andrew)
[sfrench/cifs-2.6.git] / arch / arc / include / asm / switch_to.h
1 /*
2  * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
3  *
4  * This program is free software; you can redistribute it and/or modify
5  * it under the terms of the GNU General Public License version 2 as
6  * published by the Free Software Foundation.
7  */
8
9 #ifndef _ASM_ARC_SWITCH_TO_H
10 #define _ASM_ARC_SWITCH_TO_H
11
12 #ifndef __ASSEMBLY__
13
14 #include <linux/sched.h>
15
16 #ifdef CONFIG_ARC_FPU_SAVE_RESTORE
17
18 extern void fpu_save_restore(struct task_struct *p, struct task_struct *n);
19 #define ARC_FPU_PREV(p, n)      fpu_save_restore(p, n)
20 #define ARC_FPU_NEXT(t)
21
22 #else
23
24 #define ARC_FPU_PREV(p, n)
25 #define ARC_FPU_NEXT(n)
26
27 #endif /* !CONFIG_ARC_FPU_SAVE_RESTORE */
28
29 #ifdef CONFIG_ARC_PLAT_EZNPS
30 extern void dp_save_restore(struct task_struct *p, struct task_struct *n);
31 #define ARC_EZNPS_DP_PREV(p, n)      dp_save_restore(p, n)
32 #else
33 #define ARC_EZNPS_DP_PREV(p, n)
34
35 #endif /* !CONFIG_ARC_PLAT_EZNPS */
36
37 struct task_struct *__switch_to(struct task_struct *p, struct task_struct *n);
38
39 #define switch_to(prev, next, last)     \
40 do {                                    \
41         ARC_EZNPS_DP_PREV(prev, next);  \
42         ARC_FPU_PREV(prev, next);       \
43         last = __switch_to(prev, next);\
44         ARC_FPU_NEXT(next);             \
45         mb();                           \
46 } while (0)
47
48 #endif
49
50 #endif