| #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 "\n\tisync\n" |
| #define PPC_RELEASE_BARRIER stringify_in_c(LWSYNC) "\n" |
| #else |
| #define PPC_ACQUIRE_BARRIER |
| #define PPC_RELEASE_BARRIER |
| #endif |
| |
| #endif /* __KERNEL__ */ |
| #endif /* _ASM_POWERPC_SYNCH_H */ |