LXR linux/arch/c6x/include/asm/switch

   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
  18struct task_struct;
  19struct thread_struct;
  20asmlinkage 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