arch/arc/include/asm/switch_to.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
   4  */
   5
   6 #ifndef _ASM_ARC_SWITCH_TO_H
   7 #define _ASM_ARC_SWITCH_TO_H
   8
   9 #ifndef __ASSEMBLY__
  10
  11 #include <linux/sched.h>
  12 #include <asm/fpu.h>
  13
  14 #ifdef CONFIG_ARC_PLAT_EZNPS
  15 extern void dp_save_restore(struct task_struct *p, struct task_struct *n);
  16 #define ARC_EZNPS_DP_PREV(p, n)      dp_save_restore(p, n)
  17 #else
  18 #define ARC_EZNPS_DP_PREV(p, n)
  19
  20 #endif /* !CONFIG_ARC_PLAT_EZNPS */
  21
  22 struct task_struct *__switch_to(struct task_struct *p, struct task_struct *n);
  23
  24 #define switch_to(prev, next, last)     \
  25 do {                                    \
  26         ARC_EZNPS_DP_PREV(prev, next);  \
  27         fpu_save_restore(prev, next);   \
  28         last = __switch_to(prev, next);\
  29         mb();                           \
  30 } while (0)
  31
  32 #endif
  33
  34 #endif