1 files changed, 52 insertions, 0 deletions
diff --git a/arch/nios2/include/asm/io.h b/arch/nios2/include/asm/io.h
new file mode 100644
index 0000000000..0d242053ba
--- /dev/null
+++ b/arch/nios2/include/asm/io.h
@@ -0,0 +1,52 @@
+/*
+ * (C) Copyright 2004, Psyent Corporation <www.psyent.com>
+ * Scott McNutt <smcnutt@psyent.com>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#ifndef __ASM_NIOS2_IO_H_
+#define __ASM_NIOS2_IO_H_
+
+#define __raw_writeb(v, a)       (*(volatile unsigned char  *)(a) = (v))
+#define __raw_writew(v, a)       (*(volatile unsigned short *)(a) = (v))
+#define __raw_writel(v, a)       (*(volatile unsigned int   *)(a) = (v))
+
+#define __raw_readb(a)          (*(volatile unsigned char  *)(a))
+#define __raw_readw(a)          (*(volatile unsigned short *)(a))
+#define __raw_readl(a)          (*(volatile unsigned int   *)(a))
+
+#define readb(addr)\
+	({unsigned char val;\
+	 asm volatile("ldbio %0, 0(%1)" : "=r"(val) : "r" (addr)); val; })
+#define readw(addr)\
+	({unsigned short val;\
+	 asm volatile("ldhio %0, 0(%1)" : "=r"(val) : "r" (addr)); val; })
+#define readl(addr)\
+	({unsigned long val;\
+	 asm volatile("ldwio %0, 0(%1)" : "=r"(val) : "r" (addr)); val; })
+
+#define writeb(val, addr)\
+	asm volatile("stbio %0, 0(%1)" : : "r" (val), "r" (addr))
+#define writew(val, addr)\
+	asm volatile ("sthio %0, 0(%1)" : : "r" (val), "r" (addr))
+#define writel(val, addr)\
+	asm volatile("stwio %0, 0(%1)" : : "r" (val), "r" (addr))
+
+#endif /* __ASM_NIOS2_IO_H_ */