1 /*
2  *  Port on Texas Instruments TMS320C6x architecture
3  *
4  *  Copyright (C) 2004, 2009, 2010, 2011 Texas Instruments Incorporated
5  *  Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com)
6  *
7  *  This program is free software; you can redistribute it and/or modify
8  *  it under the terms of the GNU General Public License version 2 as
9  *  published by the Free Software Foundation.
10  */
11 #ifndef _ASM_C6X_SWITCH_TO_H
12 #define _ASM_C6X_SWITCH_TO_H
13 
14 #include <linux/linkage.h>
15 
16 #define prepare_to_switch()    do { } while (0)
17 
18 struct task_struct;
19 struct thread_struct;
20 asmlinkage void *__switch_to(struct thread_struct *prev,
21 			     struct thread_struct *next,
22 			     struct task_struct *tsk);
23 
24 #define switch_to(prev, next, last)				\
25 	do {							\
26 		current->thread.wchan = (u_long) __builtin_return_address(0); \
27 		(last) = __switch_to(&(prev)->thread,		\
28 				     &(next)->thread, (prev));	\
29 		mb();						\
30 		current->thread.wchan = 0;			\
31 	} while (0)
32 
33 #endif /* _ASM_C6X_SWITCH_TO_H */
34