root/arch/arc/include/asm/switch_to.h

INCLUDED FROM

   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 
  13 #ifdef CONFIG_ARC_FPU_SAVE_RESTORE
  14 
  15 extern void fpu_save_restore(struct task_struct *p, struct task_struct *n);
  16 #define ARC_FPU_PREV(p, n)      fpu_save_restore(p, n)
  17 #define ARC_FPU_NEXT(t)
  18 
  19 #else
  20 
  21 #define ARC_FPU_PREV(p, n)
  22 #define ARC_FPU_NEXT(n)
  23 
  24 #endif /* !CONFIG_ARC_FPU_SAVE_RESTORE */
  25 
  26 #ifdef CONFIG_ARC_PLAT_EZNPS
  27 extern void dp_save_restore(struct task_struct *p, struct task_struct *n);
  28 #define ARC_EZNPS_DP_PREV(p, n)      dp_save_restore(p, n)
  29 #else
  30 #define ARC_EZNPS_DP_PREV(p, n)
  31 
  32 #endif /* !CONFIG_ARC_PLAT_EZNPS */
  33 
  34 struct task_struct *__switch_to(struct task_struct *p, struct task_struct *n);
  35 
  36 #define switch_to(prev, next, last)     \
  37 do {                                    \
  38         ARC_EZNPS_DP_PREV(prev, next);  \
  39         ARC_FPU_PREV(prev, next);       \
  40         last = __switch_to(prev, next);\
  41         ARC_FPU_NEXT(next);             \
  42         mb();                           \
  43 } while (0)
  44 
  45 #endif
  46 
  47 #endif