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/* SPDX-License-Identifier: GPL-2.0 */ #ifndef _ASM_POWERPC_SYNCH_H #define _ASM_POWERPC_SYNCH_H #ifdef __KERNEL__ #include <linux/stringify.h> #include <asm/feature-fixups.h> #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 */