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/*
* Copyright 2004-2009 Analog Devices Inc.
* Tony Kou (tonyko@lineo.ca)
*
* Licensed under the GPL-2 or later
*/
#ifndef _BLACKFIN_SWITCH_TO_H
#define _BLACKFIN_SWITCH_TO_H
#define prepare_to_switch() do { } while(0)
/*
* switch_to(n) should switch tasks to task ptr, first checking that
* ptr isn't the current task, in which case it does nothing.
*/
#include <asm/l1layout.h>
#include <asm/mem_map.h>
asmlinkage struct task_struct *resume(struct task_struct *prev, struct task_struct *next);
#ifndef CONFIG_SMP
#define switch_to(prev,next,last) \
do { \
memcpy (&task_thread_info(prev)->l1_task_info, L1_SCRATCH_TASK_INFO, \
sizeof *L1_SCRATCH_TASK_INFO); \
memcpy (L1_SCRATCH_TASK_INFO, &task_thread_info(next)->l1_task_info, \
sizeof *L1_SCRATCH_TASK_INFO); \
(last) = resume (prev, next); \
} while (0)
#else
#define switch_to(prev, next, last) \
do { \
(last) = resume(prev, next); \
} while (0)
#endif
#endif /* _BLACKFIN_SWITCH_TO_H */