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 */
31 void __iomem *ioremap_prot(phys_addr_t phys_addr, size_t size,
32 unsigned long prot);
33 #define ioremap_prot ioremap_prot
34 #define iounmap iounmap
35
36 static 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_val(pgprot_noncached(PAGE_KERNEL)));
44 }
45 #define ioremap ioremap
46
47 static 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, pgprot_val(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 */
63
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