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64 lines
1.4 KiB
C
64 lines
1.4 KiB
C
#ifndef __XEN_SYNCH_BITOPS_H__
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#define __XEN_SYNCH_BITOPS_H__
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/*
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* Copyright 1992, Linus Torvalds.
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* Heavily modified to provide guaranteed strong synchronisation
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* when communicating with Xen or other guest OSes running on other CPUs.
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*/
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#include <linux/config.h>
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#define ADDR (*(volatile long *) addr)
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static __inline__ void synch_set_bit(int nr, volatile void * addr)
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{
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set_bit(nr, addr);
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}
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static __inline__ void synch_clear_bit(int nr, volatile void * addr)
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{
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clear_bit(nr, addr);
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}
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static __inline__ void synch_change_bit(int nr, volatile void * addr)
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{
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change_bit(nr, addr);
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}
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static __inline__ int synch_test_and_set_bit(int nr, volatile void * addr)
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{
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return test_and_set_bit(nr, addr);
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}
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static __inline__ int synch_test_and_clear_bit(int nr, volatile void * addr)
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{
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return test_and_clear_bit(nr, addr);
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}
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static __inline__ int synch_test_and_change_bit(int nr, volatile void * addr)
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{
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return test_and_change_bit(nr, addr);
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}
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static __inline__ int synch_const_test_bit(int nr, const volatile void * addr)
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{
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return test_bit(nr, addr);
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}
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static __inline__ int synch_var_test_bit(int nr, volatile void * addr)
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{
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return test_bit(nr, addr);
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}
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#define synch_cmpxchg ia64_cmpxchg4_acq
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#define synch_test_bit(nr,addr) \
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(__builtin_constant_p(nr) ? \
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synch_const_test_bit((nr),(addr)) : \
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synch_var_test_bit((nr),(addr)))
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#define synch_cmpxchg_subword synch_cmpxchg
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#endif /* __XEN_SYNCH_BITOPS_H__ */
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