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kernel/linux-rt-4.4.41/arch/powerpc/include/asm/synch.h 1.45 KB
5113f6f70   김현기   kernel add
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  #ifndef _ASM_POWERPC_SYNCH_H 
  #define _ASM_POWERPC_SYNCH_H 
  #ifdef __KERNEL__
  
  #include <linux/stringify.h>
  #include <asm/feature-fixups.h>
  
  #if defined(__powerpc64__) || defined(CONFIG_PPC_E500MC)
  #define __SUBARCH_HAS_LWSYNC
  #endif
  
  #ifndef __ASSEMBLY__
  extern unsigned int __start___lwsync_fixup, __stop___lwsync_fixup;
  extern void do_lwsync_fixups(unsigned long value, void *fixup_start,
  			     void *fixup_end);
  extern void do_final_fixups(void);
  
  static inline void eieio(void)
  {
  	__asm__ __volatile__ ("eieio" : : : "memory");
  }
  
  static inline void isync(void)
  {
  	__asm__ __volatile__ ("isync" : : : "memory");
  }
  #endif /* __ASSEMBLY__ */
  
  #if defined(__powerpc64__)
  #    define LWSYNC	lwsync
  #elif defined(CONFIG_E500)
  #    define LWSYNC					\
  	START_LWSYNC_SECTION(96);			\
  	sync;						\
  	MAKE_LWSYNC_SECTION_ENTRY(96, __lwsync_fixup);
  #else
  #    define LWSYNC	sync
  #endif
  
  #ifdef CONFIG_SMP
  #define __PPC_ACQUIRE_BARRIER				\
  	START_LWSYNC_SECTION(97);			\
  	isync;						\
  	MAKE_LWSYNC_SECTION_ENTRY(97, __lwsync_fixup);
  #define PPC_ACQUIRE_BARRIER	 "
  " stringify_in_c(__PPC_ACQUIRE_BARRIER)
  #define PPC_RELEASE_BARRIER	 stringify_in_c(LWSYNC) "
  "
  #define PPC_ATOMIC_ENTRY_BARRIER "
  " stringify_in_c(sync) "
  "
  #define PPC_ATOMIC_EXIT_BARRIER	 "
  " stringify_in_c(sync) "
  "
  #else
  #define PPC_ACQUIRE_BARRIER
  #define PPC_RELEASE_BARRIER
  #define PPC_ATOMIC_ENTRY_BARRIER
  #define PPC_ATOMIC_EXIT_BARRIER
  #endif
  
  #endif /* __KERNEL__ */
  #endif	/* _ASM_POWERPC_SYNCH_H */