+#ifndef _ASM_POWERPC_TIMEX_H
+#define _ASM_POWERPC_TIMEX_H
+
+#ifdef __KERNEL__
+
/*
- * include/asm-ppc/timex.h
- *
- * ppc architecture timex specifications
+ * PowerPC architecture timex specifications
*/
-#ifdef __KERNEL__
-#ifndef _ASMppc_TIMEX_H
-#define _ASMppc_TIMEX_H
#include <linux/config.h>
#include <asm/cputable.h>
typedef unsigned long cycles_t;
-/*
- * For the "cycle" counter we use the timebase lower half.
- * Currently only used on SMP.
- */
-
static inline cycles_t get_cycles(void)
{
- cycles_t ret = 0;
+ cycles_t ret;
+
+#ifdef __powerpc64__
+
+ __asm__ __volatile__("mftb %0" : "=r" (ret) : );
+
+#else
+ /*
+ * For the "cycle" counter we use the timebase lower half.
+ * Currently only used on SMP.
+ */
+
+ ret = 0;
__asm__ __volatile__(
"98: mftb %0\n"
" .long 99b\n"
".previous"
: "=r" (ret) : "i" (CPU_FTR_601));
+#endif
+
return ret;
}
-#endif
-#endif /* __KERNEL__ */
+#endif /* __KERNEL__ */
+#endif /* _ASM_POWERPC_TIMEX_H */