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