From 8e4bff4cab0ddac6060645b0715210484d02ff40 Mon Sep 17 00:00:00 2001
From: Yuval Adam <_@yuv.al>
Date: Wed, 30 Aug 2017 08:25:59 +0000
Subject: Initial file dump from open source release

---
 arch/xtensa/include/asm/io.h | 82 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 82 insertions(+)
 create mode 100644 arch/xtensa/include/asm/io.h

(limited to 'arch/xtensa/include/asm/io.h')

diff --git a/arch/xtensa/include/asm/io.h b/arch/xtensa/include/asm/io.h
new file mode 100644
index 00000000..700c2e6f
--- /dev/null
+++ b/arch/xtensa/include/asm/io.h
@@ -0,0 +1,82 @@
+/*
+ * 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 <linux/bug.h>
+#include <linux/kernel.h>
+
+#include <linux/types.h>
+
+#define XCHAL_KIO_CACHED_VADDR	0xe0000000
+#define XCHAL_KIO_BYPASS_VADDR	0xf0000000
+#define XCHAL_KIO_PADDR		0xf0000000
+#define XCHAL_KIO_SIZE		0x10000000
+
+#define IOADDR(x)		(XCHAL_KIO_BYPASS_VADDR + (x))
+#define IO_SPACE_LIMIT ~0
+
+#ifdef CONFIG_MMU
+/*
+ * 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 */
+
+/*
+ * Generic I/O
+ */
+#define readb_relaxed readb
+#define readw_relaxed readw
+#define readl_relaxed readl
+
+#endif	/* __KERNEL__ */
+
+#include <asm-generic/io.h>
+
+#endif	/* _XTENSA_IO_H */
-- 
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