arch/sh/include/asm/switch_to_64.h

   1 /*
   2  * Copyright (C) 2000, 2001  Paolo Alberelli
   3  * Copyright (C) 2003  Paul Mundt
   4  * Copyright (C) 2004  Richard Curnow
   5  *
   6  * This file is subject to the terms and conditions of the GNU General Public
   7  * License.  See the file "COPYING" in the main directory of this archive
   8  * for more details.
   9  */
  10 #ifndef __ASM_SH_SWITCH_TO_64_H
  11 #define __ASM_SH_SWITCH_TO_64_H
  12
  13 struct thread_struct;
  14 struct task_struct;
  15
  16 /*
  17  *      switch_to() should switch tasks to task nr n, first
  18  */
  19 struct task_struct *sh64_switch_to(struct task_struct *prev,
  20                                    struct thread_struct *prev_thread,
  21                                    struct task_struct *next,
  22                                    struct thread_struct *next_thread);
  23
  24 #define switch_to(prev,next,last)                               \
  25 do {                                                            \
  26         if (last_task_used_math != next) {                      \
  27                 struct pt_regs *regs = next->thread.uregs;      \
  28                 if (regs) regs->sr |= SR_FD;                    \
  29         }                                                       \
  30         last = sh64_switch_to(prev, &prev->thread, next,        \
  31                               &next->thread);                   \
  32 } while (0)
  33
  34
  35 #endif /* __ASM_SH_SWITCH_TO_64_H */