|  | /* | 
|  | *  Port on Texas Instruments TMS320C6x architecture | 
|  | * | 
|  | *  Copyright (C) 2004, 2009, 2010, 2011 Texas Instruments Incorporated | 
|  | *  Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com) | 
|  | * | 
|  | *  This program is free software; you can redistribute it and/or modify | 
|  | *  it under the terms of the GNU General Public License version 2 as | 
|  | *  published by the Free Software Foundation. | 
|  | */ | 
|  | #ifndef _ASM_C6X_SWITCH_TO_H | 
|  | #define _ASM_C6X_SWITCH_TO_H | 
|  |  | 
|  | #include <linux/linkage.h> | 
|  |  | 
|  | #define prepare_to_switch()    do { } while (0) | 
|  |  | 
|  | struct task_struct; | 
|  | struct thread_struct; | 
|  | asmlinkage void *__switch_to(struct thread_struct *prev, | 
|  | struct thread_struct *next, | 
|  | struct task_struct *tsk); | 
|  |  | 
|  | #define switch_to(prev, next, last)				\ | 
|  | do {							\ | 
|  | current->thread.wchan = (u_long) __builtin_return_address(0); \ | 
|  | (last) = __switch_to(&(prev)->thread,		\ | 
|  | &(next)->thread, (prev));	\ | 
|  | mb();						\ | 
|  | current->thread.wchan = 0;			\ | 
|  | } while (0) | 
|  |  | 
|  | #endif /* _ASM_C6X_SWITCH_TO_H */ |