LXR linux/arch/arc/include/asm/switch

   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
  18extern 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
  29struct task_struct *__switch_to(struct task_struct *p, struct task_struct *n);
  30
  31#define switch_to(prev, next, last)     \
  32do {                                    \
  33        ARC_FPU_PREV(prev, next);       \
  34        last = __switch_to(prev, next);\
  35        ARC_FPU_NEXT(next);             \
  36        mb();                           \
  37} while (0)
  38
  39#endif
  40
  41#endif
  42