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Diffstat (limited to '')
| -rw-r--r-- | arch/powerpc/include/asm/synch.h | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/synch.h b/arch/powerpc/include/asm/synch.h new file mode 100644 index 000000000..aca70fb43 --- /dev/null +++ b/arch/powerpc/include/asm/synch.h @@ -0,0 +1,53 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _ASM_POWERPC_SYNCH_H +#define _ASM_POWERPC_SYNCH_H +#ifdef __KERNEL__ + +#include <asm/feature-fixups.h> +#include <asm/asm-const.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 */ |