patch-2.4.19 linux-2.4.19/arch/ia64/sn/kernel/iomv.c

• Lines: 120
• Date: Fri Aug 2 17:39:43 2002
• Orig file: linux-2.4.18/arch/ia64/sn/kernel/iomv.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -urN linux-2.4.18/arch/ia64/sn/kernel/iomv.c linux-2.4.19/arch/ia64/sn/kernel/iomv.c
@@ -0,0 +1,119 @@
+/* 
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2000-2002 Silicon Graphics, Inc. All rights reserved.
+ */
+
+#include <asm/io.h>
+
+#if 1	/* ##jh */
+#ifdef CONFIG_IA64_SGI_SN1
+#define mmiob sn1_mmiob
+#else
+#define mmiob sn2_mmiob
+#endif
+extern void mmiob(void);
+#endif /* ##jh */
+
+extern void * sn_io_addr(unsigned long port); /* defined in sn[12]/iomv.c */
+
+/**
+ * sn_inb - read a byte from a port
+ * @port: port to read from
+ *
+ * Reads a byte from @port and returns it to the caller.
+ */
+unsigned int
+sn_inb (unsigned long port)
+{
+	volatile unsigned char *addr = sn_io_addr(port);
+	unsigned char ret;
+
+	ret = *addr;
+	__ia64_mf_a();
+	return ret;
+}
+
+/**
+ * sn_inw - read a word from a port
+ * @port: port to read from
+ *
+ * Reads a word from @port and returns it to the caller.
+ */
+unsigned int
+sn_inw (unsigned long port)
+{
+	volatile unsigned short *addr = sn_io_addr(port);
+	unsigned short ret;
+
+	ret = *addr;
+	__ia64_mf_a();
+	return ret;
+}
+
+/**
+ * sn_inl - read a word from a port
+ * @port: port to read from
+ *
+ * Reads a word from @port and returns it to the caller.
+ */
+unsigned int
+sn_inl (unsigned long port)
+{
+	volatile unsigned int *addr = sn_io_addr(port);
+	unsigned int ret;
+
+	ret = *addr;
+	__ia64_mf_a();
+	return ret;
+}
+
+/**
+ * sn_outb - write a byte to a port
+ * @port: port to write to
+ * @val: value to write
+ *
+ * Writes @val to @port.
+ */
+void
+sn_outb (unsigned char val, unsigned long port)
+{
+	volatile unsigned char *addr = sn_io_addr(port);
+
+	*addr = val;
+	mmiob();
+}
+
+/**
+ * sn_outw - write a word to a port
+ * @port: port to write to
+ * @val: value to write
+ *
+ * Writes @val to @port.
+ */
+void
+sn_outw (unsigned short val, unsigned long port)
+{
+	volatile unsigned short *addr = sn_io_addr(port);
+
+	*addr = val;
+	mmiob();
+}
+
+/**
+ * sn_outl - write a word to a port
+ * @port: port to write to
+ * @val: value to write
+ *
+ * Writes @val to @port.
+ */
+void
+sn_outl (unsigned int val, unsigned long port)
+{
+	volatile unsigned int *addr = sn_io_addr(port);
+
+	*addr = val;
+	mmiob();
+}