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__ 13extern unsigned int __start___lwsync_fixup, __stop___lwsync_fixup; 14extern void do_lwsync_fixups(unsigned long value, void *fixup_start, 15 void *fixup_end); 16 17static inline void eieio(void) 18{ 19 __asm__ __volatile__ ("eieio" : : : "memory"); 20} 21 22static 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