diff --git a/include/asm-sparc64/ns87303.h b/include/asm-sparc64/ns87303.h
new file mode 100644
index 0000000..6d58fdf
--- /dev/null
+++ b/include/asm-sparc64/ns87303.h
@@ -0,0 +1,119 @@
+/* $Id: ns87303.h,v 1.3 2000/01/09 15:16:34 ecd Exp $
+ * ns87303.h: Configuration Register Description for the
+ *            National Semiconductor PC87303 (SuperIO).
+ *
+ * Copyright (C) 1997  Eddie C. Dost  (ecd@skynet.be)
+ */
+
+#ifndef _SPARC_NS87303_H
+#define _SPARC_NS87303_H 1
+
+/*
+ * Control Register Index Values
+ */
+#define FER	0x00
+#define FAR	0x01
+#define PTR	0x02
+#define FCR	0x03
+#define PCR	0x04
+#define KRR	0x05
+#define PMC	0x06
+#define TUP	0x07
+#define SID	0x08
+#define ASC	0x09
+#define CS0CF0	0x0a
+#define CS0CF1	0x0b
+#define CS1CF0	0x0c
+#define CS1CF1	0x0d
+
+/* Function Enable Register (FER) bits */
+#define FER_EDM		0x10	/* Encoded Drive and Motor pin information   */
+
+/* Function Address Register (FAR) bits */
+#define FAR_LPT_MASK	0x03
+#define FAR_LPTB	0x00
+#define FAR_LPTA	0x01
+#define FAR_LPTC	0x02
+
+/* Power and Test Register (PTR) bits */
+#define PTR_LPTB_IRQ7	0x08
+#define PTR_LEVEL_IRQ	0x80	/* When not ECP/EPP: Use level IRQ           */
+#define PTR_LPT_REG_DIR	0x80	/* When ECP/EPP: LPT CTR controlls direction */
+				/*               of the parallel port	     */
+
+/* Function Control Register (FCR) bits */
+#define FCR_LDE		0x10	/* Logical Drive Exchange                    */
+#define FCR_ZWS_ENA	0x20	/* Enable short host read/write in ECP/EPP   */
+
+/* Printer Control Register (PCR) bits */
+#define PCR_EPP_ENABLE	0x01
+#define PCR_EPP_IEEE	0x02	/* Enable EPP Version 1.9 (IEEE 1284)        */
+#define PCR_ECP_ENABLE	0x04
+#define PCR_ECP_CLK_ENA	0x08	/* If 0 ECP Clock is stopped on Power down   */
+#define PCR_IRQ_POLAR	0x20	/* If 0 IRQ is level high or negative pulse, */
+				/* if 1 polarity is inverted                 */
+#define PCR_IRQ_ODRAIN	0x40	/* If 1, IRQ is open drain                   */
+
+/* Tape UARTs and Parallel Port Config Register (TUP) bits */
+#define TUP_EPP_TIMO	0x02	/* Enable EPP timeout IRQ                    */
+
+/* Advanced SuperIO Config Register (ASC) bits */
+#define ASC_LPT_IRQ7	0x01	/* Always use IRQ7 for LPT                  */
+#define ASC_DRV2_SEL	0x02	/* Logical Drive Exchange controlled by TDR  */
+
+#define FER_RESERVED	0x00
+#define FAR_RESERVED	0x00
+#define PTR_RESERVED	0x73
+#define FCR_RESERVED	0xc4
+#define PCR_RESERVED	0x10
+#define KRR_RESERVED	0x00
+#define PMC_RESERVED	0x98
+#define TUP_RESERVED	0xfb
+#define SIP_RESERVED	0x00
+#define ASC_RESERVED	0x18
+#define CS0CF0_RESERVED	0x00
+#define CS0CF1_RESERVED	0x08
+#define CS1CF0_RESERVED	0x00
+#define CS1CF1_RESERVED	0x08
+
+#ifdef __KERNEL__
+
+#include <linux/spinlock.h>
+
+#include <asm/system.h>
+#include <asm/io.h>
+
+extern spinlock_t ns87303_lock;
+
+static __inline__ int ns87303_modify(unsigned long port, unsigned int index,
+				     unsigned char clr, unsigned char set)
+{
+	static unsigned char reserved[] = {
+		FER_RESERVED, FAR_RESERVED, PTR_RESERVED, FCR_RESERVED,
+		PCR_RESERVED, KRR_RESERVED, PMC_RESERVED, TUP_RESERVED,
+		SIP_RESERVED, ASC_RESERVED, CS0CF0_RESERVED, CS0CF1_RESERVED,
+		CS1CF0_RESERVED, CS1CF1_RESERVED
+	};
+	unsigned long flags;
+	unsigned char value;
+
+	if (index > 0x0d)
+		return -EINVAL;
+
+	spin_lock_irqsave(&ns87303_lock, flags);
+
+	outb(index, port);
+	value = inb(port + 1);
+	value &= ~(reserved[index] | clr);
+	value |= set;
+	outb(value, port + 1);
+	outb(value, port + 1);
+
+	spin_unlock_irqrestore(&ns87303_lock, flags);
+
+	return 0;
+}
+
+#endif /* __KERNEL__ */
+
+#endif /* !(_SPARC_NS87303_H) */