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 18 extern 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 29 #ifdef CONFIG_ARC_PLAT_EZNPS 30 extern void dp_save_restore(struct task_struct *p, struct task_struct *n); 31 #define ARC_EZNPS_DP_PREV(p, n) dp_save_restore(p, n) 32 #else 33 #define ARC_EZNPS_DP_PREV(p, n) 34 35 #endif /* !CONFIG_ARC_PLAT_EZNPS */ 36 37 struct task_struct *__switch_to(struct task_struct *p, struct task_struct *n); 38 39 #define switch_to(prev, next, last) \ 40 do { \ 41 ARC_EZNPS_DP_PREV(prev, next); \ 42 ARC_FPU_PREV(prev, next); \ 43 last = __switch_to(prev, next);\ 44 ARC_FPU_NEXT(next); \ 45 mb(); \ 46 } while (0) 47 48 #endif 49 50 #endif 51