original files of m241

vxworks-6.9/target/h/drv/timer/i8253.h

@@ -0,0 +1,41 @@
+/* i8253.h - Intel 8253 PIT (Programmable Interrupt Timer) */
+
+/* Copyright 1984-1993 Wind River Systems, Inc. */
+
+/*
+modification history
+--------------------
+01b,16jun93,hdn	 updated to 5.1.
+01a,20may92,hdn	 written.
+*/
+
+#ifndef	__INCi8253h
+#define	__INCi8253h
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*
+ * The macro PIT_REG_ADDR_INTERVAL must be defined
+ * when including this header.
+ */
+
+/* default definitions */
+
+#define	CAST
+
+#define PIT_ADRS(base,reg)   (CAST (base+(reg*PIT_REG_ADDR_INTERVAL)))
+
+/* register definitions */
+
+#define PIT_CNT0(base)	PIT_ADRS(base,0x00)	/* Counter 0. */
+#define PIT_CNT1(base)	PIT_ADRS(base,0x01)	/* Counter 1. */
+#define PIT_CNT2(base)	PIT_ADRS(base,0x02)	/* Counter 2. */
+#define PIT_CMD(base)	PIT_ADRS(base,0x03)	/* Control word. */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif	/* __INCi8253h */