patch-2.4.22 linux-2.4.22/include/asm-ia64/sn/sn2/io.h

• Lines: 223
• Date: 2003-08-25 04:44:43.000000000 -0700
• Orig file: linux-2.4.21/include/asm-ia64/sn/sn2/io.h
• Orig date: 1969-12-31 16:00:00.000000000 -0800

diff -urN linux-2.4.21/include/asm-ia64/sn/sn2/io.h linux-2.4.22/include/asm-ia64/sn/sn2/io.h
@@ -0,0 +1,222 @@
+/* 
+ * 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) 2000-2003 Silicon Graphics, Inc. All rights reserved.
+ */
+
+#ifndef _ASM_SN_SN2_IO_H
+#define _ASM_SN_SN2_IO_H
+
+extern void * sn_io_addr(unsigned long port); /* Forward definition */
+extern void sn_mmiob(void); /* Forward definition */
+
+#define __sn_mf_a()   __asm__ __volatile__ ("mf.a" ::: "memory")
+
+extern void sn_dma_flush(unsigned long);
+
+/*
+ * The following routines are SN Platform specific, called when
+ * a reference is made to inX/outX set macros.  SN Platform
+ * inX set of macros ensures that Posted DMA writes on the
+ * Bridge is flushed.
+ *
+ * The routines should be self explainatory.
+ */
+
+static inline unsigned int
+__sn_inb (unsigned long port)
+{
+	volatile unsigned char *addr;
+	unsigned char ret = -1;
+
+	if ((addr = sn_io_addr(port))) {
+		ret = *addr;
+		__sn_mf_a();
+		sn_dma_flush((unsigned long)addr);
+	}
+	return ret;
+}
+
+static inline unsigned int
+__sn_inw (unsigned long port)
+{
+	volatile unsigned short *addr;
+	unsigned short ret = -1;
+
+	if ((addr = sn_io_addr(port))) {
+		ret = *addr;
+		__sn_mf_a();
+		sn_dma_flush((unsigned long)addr);
+	}
+	return ret;
+}
+
+static inline unsigned int
+__sn_inl (unsigned long port)
+{
+	volatile unsigned int *addr;
+	unsigned int ret = -1;
+
+	if ((addr = sn_io_addr(port))) {
+		ret = *addr;
+		__sn_mf_a();
+		sn_dma_flush((unsigned long)addr);
+	}
+	return ret;
+}
+
+static inline void
+__sn_outb (unsigned char val, unsigned long port)
+{
+	volatile unsigned char *addr;
+
+	if ((addr = sn_io_addr(port))) {
+		*addr = val;
+		sn_mmiob();
+	}
+}
+
+static inline void
+__sn_outw (unsigned short val, unsigned long port)
+{
+	volatile unsigned short *addr;
+
+	if ((addr = sn_io_addr(port))) {
+		*addr = val;
+		sn_mmiob();
+	}
+}
+
+static inline void
+__sn_outl (unsigned int val, unsigned long port)
+{
+	volatile unsigned int *addr;
+
+	if ((addr = sn_io_addr(port))) {
+		*addr = val;
+		sn_mmiob();
+	}
+}
+
+/*
+ * The following routines are SN Platform specific, called when 
+ * a reference is made to readX/writeX set macros.  SN Platform 
+ * readX set of macros ensures that Posted DMA writes on the 
+ * Bridge is flushed.
+ * 
+ * The routines should be self explainatory.
+ */
+
+static inline unsigned char
+__sn_readb (void *addr)
+{
+	unsigned char val;
+
+	val = *(volatile unsigned char *)addr;
+	__sn_mf_a();
+	sn_dma_flush((unsigned long)addr);
+        return val;
+}
+
+static inline unsigned short
+__sn_readw (void *addr)
+{
+	unsigned short val;
+
+	val = *(volatile unsigned short *)addr;
+	__sn_mf_a();
+	sn_dma_flush((unsigned long)addr);
+        return val;
+}
+
+static inline unsigned int
+__sn_readl (void *addr)
+{
+	unsigned int val;
+
+	val = *(volatile unsigned int *) addr;
+	__sn_mf_a();
+	sn_dma_flush((unsigned long)addr);
+        return val;
+}
+
+static inline unsigned long
+__sn_readq (void *addr)
+{
+	unsigned long val;
+
+	val = *(volatile unsigned long *) addr;
+	__sn_mf_a();
+	sn_dma_flush((unsigned long)addr);
+        return val;
+}
+
+/*
+ * For generic and SN2 kernels, we have a set of fast access
+ * PIO macros.	These macros are provided on SN Platform
+ * because the normal inX and readX macros perform an
+ * additional task of flushing Post DMA request on the Bridge.
+ *
+ * These routines should be self explainatory.
+ */
+
+static inline unsigned int
+sn_inb_fast (unsigned long port)
+{
+	volatile unsigned char *addr = (unsigned char *)port;
+	unsigned char ret;
+
+	ret = *addr;
+	__sn_mf_a();
+	return ret;
+}
+
+static inline unsigned int
+sn_inw_fast (unsigned long port)
+{
+	volatile unsigned short *addr = (unsigned short *)port;
+	unsigned short ret;
+
+	ret = *addr;
+	__sn_mf_a();
+	return ret;
+}
+
+static inline unsigned int
+sn_inl_fast (unsigned long port)
+{
+	volatile unsigned int *addr = (unsigned int *)port;
+	unsigned int ret;
+
+	ret = *addr;
+	__sn_mf_a();
+	return ret;
+}
+
+static inline unsigned char
+sn_readb_fast (void *addr)
+{
+	return *(volatile unsigned char *)addr;
+}
+
+static inline unsigned short
+sn_readw_fast (void *addr)
+{
+	return *(volatile unsigned short *)addr;
+}
+
+static inline unsigned int
+sn_readl_fast (void *addr)
+{
+	return *(volatile unsigned int *) addr;
+}
+
+static inline unsigned long
+sn_readq_fast (void *addr)
+{
+	return *(volatile unsigned long *) addr;
+}
+
+#endif