+#ifndef _ARCH_X86_H
+#define _ARCH_X86_H
+
/*
* arch_x86.h: Definitions for the x86 architecture, derived from Linux.
*
* Copyright (c) 2009 Paul E. McKenney, IBM Corporation.
*/
+#include <compiler.h>
+
/* Assume P4 or newer */
#define CONFIG_HAVE_FENCE 1
#define CONFIG_HAVE_MEM_COHERENCY
#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()
+
/* REP NOP (PAUSE) is a good thing to insert into busy-wait loops. */
static inline void rep_nop(void)
{
rdtscll(ret);
return ret;
}
+
+#endif /* _ARCH_X86_H */