original files of m241

vxworks-6.9/target/h/drv/intrCtl/i8259a.h

@@ -0,0 +1,73 @@
+/* i8259a.h - Intel 8259a PIC (Programmable Interrupt Controller) */
+
+/* Copyright 1984-1996 Wind River Systems, Inc. */
+
+/*
+modification history
+--------------------
+01e,17mar97,hdn	 added function declarations.
+01d,03jan95,vin	 added PIC_ISR_MASK, PIC_IRR_MASK, OCW3
+01c,16aug93,hdn	 deleted PIC_BASE_ADRS macros.
+01b,16jun93,hdn	 updated to 5.1.
+01a,15may92,hdn	 written.
+*/
+
+#ifndef	__INCi8259ah
+#define	__INCi8259ah
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*
+ * The macro PIC_REG_ADDR_INTERVAL must be defined
+ * when including this header.
+ */
+
+/* default definitions */
+
+#define	CAST
+
+#define PIC_ADRS(base,reg)   (CAST (base+(reg*PIC_REG_ADDR_INTERVAL)))
+
+/* register definitions */
+
+#define PIC_port1(base)	PIC_ADRS(base,0x00)	/* port 1. */
+#define PIC_port2(base)	PIC_ADRS(base,0x01)	/* port 2. */
+
+/* alias */
+
+#define PIC_IMASK(base)	PIC_port2(base)		/* Interrupt mask. */
+#define PIC_IACK(base)	PIC_port1(base)		/* Interrupt acknowledge. */
+
+#define PIC_ISR_MASK(base) PIC_port1(base)	/* in-service register mask */
+#define PIC_IRR_MASK(base) PIC_port1(base) 	/* interrupt request reg */
+
+#define OCW3_DEF	0x08			/* 3rd default control word */
+#define OCW3_PCB	0x04			/* Polling Control Bit */
+#define OCW3_ISR	0x03			/* Read in-service reg */
+#define OCW3_IRR	0x02			/* Read inter request reg */
+
+#ifndef _ASMLANGUAGE
+
+#if defined(__STDC__) || defined(__cplusplus)
+
+IMPORT int	sysIntLevel	(void);
+IMPORT VOID	sysIntLock	(void);
+IMPORT VOID	sysIntUnlock	(void);
+
+#else
+
+IMPORT int	sysIntLevel	();
+IMPORT VOID	sysIntLock	();
+IMPORT VOID	sysIntUnlock	();
+
+#endif  /* __STDC__ */
+
+#endif	/* _ASMLANGUAGE */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif	/* __INCi8259ah */