diff --git a/sys/powerpc/powerpc/cpu.c b/sys/powerpc/powerpc/cpu.c
index d7f8e2d4d052..dd7ad82fd014 100644
--- a/sys/powerpc/powerpc/cpu.c
+++ b/sys/powerpc/powerpc/cpu.c
@@ -74,6 +74,8 @@
 #include <machine/smp.h>
 #include <machine/spr.h>
 
+#include <dev/ofw/openfirm.h>
+
 static void	cpu_6xx_setup(int cpuid, uint16_t vers);
 static void	cpu_970_setup(int cpuid, uint16_t vers);
 static void	cpu_booke_setup(int cpuid, uint16_t vers);
@@ -273,6 +275,10 @@ cpu_est_clockrate(int cpu_id, uint64_t *cps)
 {
 	uint16_t	vers;
 	register_t	msr;
+	phandle_t	cpu, dev, root;
+	uint32_t	freq[2];
+	int		res  = 0;
+	char		buf[8];
 
 	vers = mfpvr() >> 16;
 	msr = mfmsr();
@@ -316,6 +322,41 @@ cpu_est_clockrate(int cpu_id, uint64_t *cps)
 
 			mtmsr(msr);
 			return (0);
+
+		case IBMPOWER5:
+		case IBMPOWER5PLUS:
+		case IBMPOWER6:
+		case IBMPOWER7:
+		case IBMPOWER7PLUS:
+		case IBMPOWER8:
+			root = OF_peer(0);
+			dev = OF_child(root);
+			while (dev != 0) {
+				res = OF_getprop(dev, "name", buf, sizeof(buf));
+				if (res > 0 && strcmp(buf, "cpus") == 0)
+					break;
+				dev = OF_peer(dev);
+			}
+			cpu = OF_child(dev);
+			while (cpu != 0) {
+				res = OF_getprop(cpu, "device_type", buf,
+						sizeof(buf));
+				if (res > 0 && strcmp(buf, "cpu") == 0)
+					break;
+				cpu = OF_peer(cpu);
+			}
+			if (cpu == 0)
+				return (ENOENT);
+			if (OF_getprop(cpu, "clock-frequency", &freq[0],
+					sizeof(freq[0])))
+					*cps = freq[0];
+			else if (OF_getprop(cpu, "ibm,extended-clock-frequency",
+					&freq, sizeof(freq)))
+					*cps = freq[1];
+			else
+			    *cps = 0;
+
+			return(0);		
 	}
 	
 	return (ENXIO);