io.h

 1/*
 2 * include/asm-xtensa/io.h
 3 *
 4 * This file is subject to the terms and conditions of the GNU General Public
 5 * License.  See the file "COPYING" in the main directory of this archive
 6 * for more details.
 7 *
 8 * Copyright (C) 2001 - 2005 Tensilica Inc.
 9 */
10
11#ifndef _XTENSA_IO_H
12#define _XTENSA_IO_H
13
14#include <asm/byteorder.h>
15#include <asm/page.h>
16#include <asm/vectors.h>
17#include <linux/bug.h>
18#include <linux/kernel.h>
19#include <linux/pgtable.h>
20
21#include <linux/types.h>
22
23#define IOADDR(x)		(XCHAL_KIO_BYPASS_VADDR + (x))
24#define IO_SPACE_LIMIT ~0
25#define PCI_IOBASE		((void __iomem *)XCHAL_KIO_BYPASS_VADDR)
26
27#ifdef CONFIG_MMU
28/*
29 * I/O memory mapping functions.
30 */
31void __iomem *ioremap_prot(phys_addr_t phys_addr, size_t size,
32			   pgprot_t prot);
33#define ioremap_prot ioremap_prot
34#define iounmap iounmap
35
36static inline void __iomem *ioremap(unsigned long offset, unsigned long size)
37{
38	if (offset >= XCHAL_KIO_PADDR
39	    && offset - XCHAL_KIO_PADDR < XCHAL_KIO_SIZE)
40		return (void*)(offset-XCHAL_KIO_PADDR+XCHAL_KIO_BYPASS_VADDR);
41	else
42		return ioremap_prot(offset, size,
43				    pgprot_noncached(PAGE_KERNEL));
44}
45#define ioremap ioremap
46
47static inline void __iomem *ioremap_cache(unsigned long offset,
48		unsigned long size)
49{
50	if (offset >= XCHAL_KIO_PADDR
51	    && offset - XCHAL_KIO_PADDR < XCHAL_KIO_SIZE)
52		return (void*)(offset-XCHAL_KIO_PADDR+XCHAL_KIO_CACHED_VADDR);
53	else
54		return ioremap_prot(offset, size, PAGE_KERNEL);
55
56}
57#define ioremap_cache ioremap_cache
58#endif /* CONFIG_MMU */
59
60#include <asm-generic/io.h>
61
62#endif	/* _XTENSA_IO_H */