1 files changed, 81 insertions, 0 deletions
diff --git a/kernel/arch/xtensa/include/asm/io.h b/kernel/arch/xtensa/include/asm/io.h
new file mode 100644
index 000000000..fe1600a09
--- /dev/null
+++ b/kernel/arch/xtensa/include/asm/io.h
@@ -0,0 +1,81 @@
+/*
+ * include/asm-xtensa/io.h
+ *
+ * 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) 2001 - 2005 Tensilica Inc.
+ */
+
+#ifndef _XTENSA_IO_H
+#define _XTENSA_IO_H
+
+#ifdef __KERNEL__
+#include <asm/byteorder.h>
+#include <asm/page.h>
+#include <asm/vectors.h>
+#include <linux/bug.h>
+#include <linux/kernel.h>
+
+#include <linux/types.h>
+
+#define IOADDR(x)		(XCHAL_KIO_BYPASS_VADDR + (x))
+#define IO_SPACE_LIMIT ~0
+
+#ifdef CONFIG_MMU
+
+#if XCHAL_HAVE_PTP_MMU && XCHAL_HAVE_SPANNING_WAY && defined(CONFIG_OF)
+extern unsigned long xtensa_kio_paddr;
+
+static inline unsigned long xtensa_get_kio_paddr(void)
+{
+	return xtensa_kio_paddr;
+}
+#endif
+
+/*
+ * Return the virtual address for the specified bus memory.
+ * Note that we currently don't support any address outside the KIO segment.
+ */
+static inline void __iomem *ioremap_nocache(unsigned long offset,
+		unsigned long size)
+{
+	if (offset >= XCHAL_KIO_PADDR
+	    && offset - XCHAL_KIO_PADDR < XCHAL_KIO_SIZE)
+		return (void*)(offset-XCHAL_KIO_PADDR+XCHAL_KIO_BYPASS_VADDR);
+	else
+		BUG();
+}
+
+static inline void __iomem *ioremap_cache(unsigned long offset,
+		unsigned long size)
+{
+	if (offset >= XCHAL_KIO_PADDR
+	    && offset - XCHAL_KIO_PADDR < XCHAL_KIO_SIZE)
+		return (void*)(offset-XCHAL_KIO_PADDR+XCHAL_KIO_CACHED_VADDR);
+	else
+		BUG();
+}
+
+#define ioremap_wc ioremap_nocache
+
+static inline void __iomem *ioremap(unsigned long offset, unsigned long size)
+{
+	return ioremap_nocache(offset, size);
+}
+
+static inline void iounmap(volatile void __iomem *addr)
+{
+}
+
+#define virt_to_bus     virt_to_phys
+#define bus_to_virt     phys_to_virt
+
+#endif /* CONFIG_MMU */
+
+#endif	/* __KERNEL__ */
+
+#include <asm-generic/io.h>
+
+#endif	/* _XTENSA_IO_H */