Index: kernel/arch/ppc32/include/cycle.h
===================================================================
--- kernel/arch/ppc32/include/cycle.h	(revision e54fb21b9e320d25471c61d2ac61343404654928)
+++ kernel/arch/ppc32/include/cycle.h	(revision def52072e1edf2ffb309583491c1e0e90a46c54f)
@@ -38,5 +38,21 @@
 static inline uint64_t get_cycle(void)
 {
-	return 0;
+	uint32_t lower;
+	uint32_t upper;
+	uint32_t upper2;
+	
+	asm volatile (
+		"1: mftbu %0\n"
+		"mftb %1\n"
+		"mftbu %2\n"
+		"cmpw %0, %2\n"
+		"bne- 1b\n"
+		: "=r" (upper),
+		  "=r" (lower),
+		  "=r" (upper2)
+		:: "cr0"
+	);
+	
+	return ((uint64_t) upper << 32) + (uint64_t) lower;
 }