ARC: I/O and DMA Mappings

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>

1 files changed, 103 insertions, 0 deletions

diff --git a/arch/arc/include/asm/io.h b/arch/arc/include/asm/io.h
new file mode 100644
index 000000000000..d20051bbbf02
--- /dev/null
+++ b/arch/arc/include/asm/io.h
@@ -0,0 +1,103 @@
+/*
+ * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef _ASM_ARC_IO_H
+#define _ASM_ARC_IO_H
+
+#include <linux/types.h>
+#include <asm/byteorder.h>
+#include <asm/page.h>
+
+#define PCI_IOBASE ((void __iomem *)0)
+
+extern void __iomem *ioremap(unsigned long physaddr, unsigned long size);
+extern void iounmap(const void __iomem *addr);
+
+#define ioremap_nocache(phy, sz)        ioremap(phy, sz)
+#define ioremap_wc(phy, sz)             ioremap(phy, sz)
+
+/* Change struct page to physical address */
+#define page_to_phys(page)              (page_to_pfn(page) << PAGE_SHIFT)
+
+#define __raw_readb __raw_readb
+static inline u8 __raw_readb(const volatile void __iomem *addr)
+{
+        u8 b;
+
+        __asm__ __volatile__(
+        "       ldb%U1 %0, %1   \n"
+        : "=r" (b)
+        : "m" (*(volatile u8 __force *)addr)
+        : "memory");
+
+        return b;
+}
+
+#define __raw_readw __raw_readw
+static inline u16 __raw_readw(const volatile void __iomem *addr)
+{
+        u16 s;
+
+        __asm__ __volatile__(
+        "       ldw%U1 %0, %1   \n"
+        : "=r" (s)
+        : "m" (*(volatile u16 __force *)addr)
+        : "memory");
+
+        return s;
+}
+
+#define __raw_readl __raw_readl
+static inline u32 __raw_readl(const volatile void __iomem *addr)
+{
+        u32 w;
+
+        __asm__ __volatile__(
+        "       ld%U1 %0, %1    \n"
+        : "=r" (w)
+        : "m" (*(volatile u32 __force *)addr)
+        : "memory");
+
+        return w;
+}
+
+#define __raw_writeb __raw_writeb
+static inline void __raw_writeb(u8 b, volatile void __iomem *addr)
+{
+        __asm__ __volatile__(
+        "       stb%U1 %0, %1   \n"
+        :
+        : "r" (b), "m" (*(volatile u8 __force *)addr)
+        : "memory");
+}
+
+#define __raw_writew __raw_writew
+static inline void __raw_writew(u16 s, volatile void __iomem *addr)
+{
+        __asm__ __volatile__(
+        "       stw%U1 %0, %1   \n"
+        :
+        : "r" (s), "m" (*(volatile u16 __force *)addr)
+        : "memory");
+
+}
+
+#define __raw_writel __raw_writel
+static inline void __raw_writel(u32 w, volatile void __iomem *addr)
+{
+        __asm__ __volatile__(
+        "       st%U1 %0, %1    \n"
+        :
+        : "r" (w), "m" (*(volatile u32 __force *)addr)
+        : "memory");
+
+}
+
+#include <asm-generic/io.h>
+
+#endif /* _ASM_ARC_IO_H */