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- /*
- * Copyright (C) 2004-2006 Atmel Corporation
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
- #ifndef __ASM_AVR32_SWITCH_TO_H
- #define __ASM_AVR32_SWITCH_TO_H
- /*
- * Help PathFinder and other Nexus-compliant debuggers keep track of
- * the current PID by emitting an Ownership Trace Message each time we
- * switch task.
- */
- #ifdef CONFIG_OWNERSHIP_TRACE
- #include <asm/ocd.h>
- #define ocd_switch(prev, next) \
- do { \
- ocd_write(PID, prev->pid); \
- ocd_write(PID, next->pid); \
- } while(0)
- #else
- #define ocd_switch(prev, next)
- #endif
- /*
- * switch_to(prev, next, last) should switch from task `prev' to task
- * `next'. `prev' will never be the same as `next'.
- *
- * We just delegate everything to the __switch_to assembly function,
- * which is implemented in arch/avr32/kernel/switch_to.S
- *
- * mb() tells GCC not to cache `current' across this call.
- */
- struct cpu_context;
- struct task_struct;
- extern struct task_struct *__switch_to(struct task_struct *,
- struct cpu_context *,
- struct cpu_context *);
- #define switch_to(prev, next, last) \
- do { \
- ocd_switch(prev, next); \
- last = __switch_to(prev, &prev->thread.cpu_context + 1, \
- &next->thread.cpu_context); \
- } while (0)
- #endif /* __ASM_AVR32_SWITCH_TO_H */
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