diff --git a/arch/arm/mach-s3c24a0/include/mach/tick.h b/arch/arm/mach-s3c24a0/include/mach/tick.h
new file mode 100644
index 0000000..9dea8ba
--- /dev/null
+++ b/arch/arm/mach-s3c24a0/include/mach/tick.h
@@ -0,0 +1,15 @@
+/* linux/arch/arm/mach-s3c24a0/include/mach/tick.h
+ *
+ * Copyright 2008 Simtec Electronics
+ *      Ben Dooks <ben@simtec.co.uk>
+ *      http://armlinux.simtec.co.uk/
+ *
+ * S3C24A0 - timer tick support
+ */
+
+#define SUBSRC_TIMER4	(1 << (IRQ_TIMER4 - IRQ_S3CUART_RX0))
+
+static inline int s3c24xx_ostimer_pending(void)
+{
+	return __raw_readl(S3C2410_SUBSRCPND) & SUBSRC_TIMER4;
+}