Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / arch / powerpc / include / asm / synch.h

diff --git a/kernel/arch/powerpc/include/asm/synch.h b/kernel/arch/powerpc/include/asm/synch.h
new file mode 100644 (file)
index 0000000..e682a71
--- /dev/null
+++ b/kernel/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 */