LGPLv2.1 relicensing

[urcu.git] / arch_ppc.h

diff --git a/arch_ppc.h b/arch_ppc.h
index 6dc5f3ee0e6fb90d84c5789e6090d68db1cae689..b43d08bdac998bcd30446fe30373ef7c261557c2 100644 (file)
--- a/arch_ppc.h
+++ b/arch_ppc.h
@@ -1,3 +1,6 @@
+#ifndef _ARCH_PPC_H
+#define _ARCH_PPC_H
+
 /*
  * arch_x86.h: Definitions for the x86 architecture, derived from Linux.
  *
@@ -18,6 +21,8 @@
  * Copyright (c) 2009 Paul E. McKenney, IBM Corporation.
  */
 
+#include <compiler.h>
+
 #define CONFIG_HAVE_FENCE 1
 #define CONFIG_HAVE_MEM_COHERENCY
 
@@ -40,6 +45,28 @@
 #define rmc()  barrier()
 #define wmc()  barrier()
 
+/* Assume SMP machine, given we don't have this information */
+#define CONFIG_SMP 1
+
+#ifdef CONFIG_SMP
+#define smp_mb()       mb()
+#define smp_rmb()      rmb()
+#define smp_wmb()      wmb()
+#define smp_mc()       mc()
+#define smp_rmc()      rmc()
+#define smp_wmc()      wmc()
+#else
+#define smp_mb()       barrier()
+#define smp_rmb()      barrier()
+#define smp_wmb()      barrier()
+#define smp_mc()       barrier()
+#define smp_rmc()      barrier()
+#define smp_wmc()      barrier()
+#endif
+
+/* Nop everywhere except on alpha. */
+#define smp_read_barrier_depends()
+
 static inline void cpu_relax(void)
 {
        barrier();
@@ -150,3 +177,5 @@ static inline cycles_t get_cycles (void)
                        return (((long long)h) << 32) + l;
        }
 }
+
+#endif /* _ARCH_PPC_H */