arch/sh/include/asm/system_64.h

   1 #ifndef __ASM_SH_SYSTEM_64_H
   2 #define __ASM_SH_SYSTEM_64_H
   3
   4 /*
   5  * include/asm-sh/system_64.h
   6  *
   7  * Copyright (C) 2000, 2001  Paolo Alberelli
   8  * Copyright (C) 2003  Paul Mundt
   9  * Copyright (C) 2004  Richard Curnow
  10  *
  11  * This file is subject to the terms and conditions of the GNU General Public
  12  * License.  See the file "COPYING" in the main directory of this archive
  13  * for more details.
  14  */
  15 #include <asm/processor.h>
  16
  17 /*
  18  *      switch_to() should switch tasks to task nr n, first
  19  */
  20 struct task_struct *sh64_switch_to(struct task_struct *prev,
  21                                    struct thread_struct *prev_thread,
  22                                    struct task_struct *next,
  23                                    struct thread_struct *next_thread);
  24
  25 #define switch_to(prev,next,last)                               \
  26 do {                                                            \
  27         if (last_task_used_math != next) {                      \
  28                 struct pt_regs *regs = next->thread.uregs;      \
  29                 if (regs) regs->sr |= SR_FD;                    \
  30         }                                                       \
  31         last = sh64_switch_to(prev, &prev->thread, next,        \
  32                               &next->thread);                   \
  33 } while (0)
  34
  35 #define __uses_jump_to_uncached
  36
  37 #define jump_to_uncached()      do { } while (0)
  38 #define back_to_cached()        do { } while (0)
  39
  40 #endif /* __ASM_SH_SYSTEM_64_H */