1 #ifndef _ASM_POWERPC_SYNCH_H 2 #define _ASM_POWERPC_SYNCH_H 3 #ifdef __KERNEL__ 4 5 #include <linux/stringify.h> 6 #include <asm/feature-fixups.h> 7 8 #if defined(__powerpc64__) || defined(CONFIG_PPC_E500MC) 9 #define __SUBARCH_HAS_LWSYNC 10 #endif 11 12 #ifndef __ASSEMBLY__ 13 extern unsigned int __start___lwsync_fixup, __stop___lwsync_fixup; 14 extern void do_lwsync_fixups(unsigned long value, void *fixup_start, 15 void *fixup_end); 16 17 static inline void eieio(void) 18 { 19 __asm__ __volatile__ ("eieio" : : : "memory"); 20 } 21 22 static inline void isync(void) 23 { 24 __asm__ __volatile__ ("isync" : : : "memory"); 25 } 26 #endif /* __ASSEMBLY__ */ 27 28 #if defined(__powerpc64__) 29 # define LWSYNC lwsync 30 #elif defined(CONFIG_E500) 31 # define LWSYNC \ 32 START_LWSYNC_SECTION(96); \ 33 sync; \ 34 MAKE_LWSYNC_SECTION_ENTRY(96, __lwsync_fixup); 35 #else 36 # define LWSYNC sync 37 #endif 38 39 #ifdef CONFIG_SMP 40 #define __PPC_ACQUIRE_BARRIER \ 41 START_LWSYNC_SECTION(97); \ 42 isync; \ 43 MAKE_LWSYNC_SECTION_ENTRY(97, __lwsync_fixup); 44 #define PPC_ACQUIRE_BARRIER "\n" stringify_in_c(__PPC_ACQUIRE_BARRIER) 45 #define PPC_RELEASE_BARRIER stringify_in_c(LWSYNC) "\n" 46 #else 47 #define PPC_ACQUIRE_BARRIER 48 #define PPC_RELEASE_BARRIER 49 #endif 50 51 #endif /* __KERNEL__ */ 52 #endif /* _ASM_POWERPC_SYNCH_H */ 53