Cregit: Linux 5.2: synch.h

Contributors: 9
Author	Tokens	Token Proportion	Commits	Commit Proportion
Kumar Gala	73	50.34%	2	15.38%
Anton Blanchard	27	18.62%	4	30.77%
Becky Bruce	17	11.72%	1	7.69%
Benjamin Herrenschmidt	13	8.97%	1	7.69%
Arnd Bergmann	6	4.14%	1	7.69%
Jakub Jelínek	4	2.76%	1	7.69%
Christophe Leroy	3	2.07%	1	7.69%
Greg Kroah-Hartman	1	0.69%	1	7.69%
Boqun Feng	1	0.69%	1	7.69%
Total	145		13

/* 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 */