From 57f0f512b273f60d52568b8c6b77e17f5636edc0 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Andr=C3=A9=20Fabian=20Silva=20Delgado?=
 <emulatorman@parabola.nu>
Date: Wed, 5 Aug 2015 17:04:01 -0300
Subject: Initial import

---
 arch/powerpc/include/asm/synch.h | 57 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 57 insertions(+)
 create mode 100644 arch/powerpc/include/asm/synch.h

(limited to 'arch/powerpc/include/asm/synch.h')

diff --git a/arch/powerpc/include/asm/synch.h b/arch/powerpc/include/asm/synch.h
new file mode 100644
index 000000000..e682a7143
--- /dev/null
+++ b/arch/powerpc/include/asm/synch.h
@@ -0,0 +1,57 @@
+#ifndef _ASM_POWERPC_SYNCH_H 
+#define _ASM_POWERPC_SYNCH_H 
+#ifdef __KERNEL__
+
+#include <linux/stringify.h>
+#include <asm/feature-fixups.h>
+
+#if defined(__powerpc64__) || defined(CONFIG_PPC_E500MC)
+#define __SUBARCH_HAS_LWSYNC
+#endif
+
+#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);
+extern void do_final_fixups(void);
+
+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(LWSYNC) "\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 */
-- 
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