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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);
- 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 "\n" stringify_in_c(__PPC_ACQUIRE_BARRIER)
- #define PPC_RELEASE_BARRIER stringify_in_c(LWSYNC) "\n"
- #define PPC_ATOMIC_ENTRY_BARRIER "\n" stringify_in_c(sync) "\n"
- #define PPC_ATOMIC_EXIT_BARRIER "\n" stringify_in_c(sync) "\n"
- #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 */
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