2 * include/asm-xtensa/io.h
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
8 * Copyright (C) 2001 - 2005 Tensilica Inc.
15 #include <asm/byteorder.h>
17 #include <asm/vectors.h>
18 #include <linux/bug.h>
19 #include <linux/kernel.h>
21 #include <linux/types.h>
23 #define IOADDR(x) (XCHAL_KIO_BYPASS_VADDR + (x))
24 #define IO_SPACE_LIMIT ~0
28 void __iomem
*xtensa_ioremap_nocache(unsigned long addr
, unsigned long size
);
29 void __iomem
*xtensa_ioremap_cache(unsigned long addr
, unsigned long size
);
30 void xtensa_iounmap(volatile void __iomem
*addr
);
33 * Return the virtual address for the specified bus memory.
35 static inline void __iomem
*ioremap_nocache(unsigned long offset
,
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
);
42 return xtensa_ioremap_nocache(offset
, size
);
45 static inline void __iomem
*ioremap_cache(unsigned long offset
,
48 if (offset
>= XCHAL_KIO_PADDR
49 && offset
- XCHAL_KIO_PADDR
< XCHAL_KIO_SIZE
)
50 return (void*)(offset
-XCHAL_KIO_PADDR
+XCHAL_KIO_CACHED_VADDR
);
52 return xtensa_ioremap_cache(offset
, size
);
54 #define ioremap_cache ioremap_cache
56 #define ioremap_wc ioremap_nocache
57 #define ioremap_wt ioremap_nocache
59 static inline void __iomem
*ioremap(unsigned long offset
, unsigned long size
)
61 return ioremap_nocache(offset
, size
);
64 static inline void iounmap(volatile void __iomem
*addr
)
66 unsigned long va
= (unsigned long) addr
;
68 if (!(va
>= XCHAL_KIO_CACHED_VADDR
&&
69 va
- XCHAL_KIO_CACHED_VADDR
< XCHAL_KIO_SIZE
) &&
70 !(va
>= XCHAL_KIO_BYPASS_VADDR
&&
71 va
- XCHAL_KIO_BYPASS_VADDR
< XCHAL_KIO_SIZE
))
75 #define virt_to_bus virt_to_phys
76 #define bus_to_virt phys_to_virt
78 #endif /* CONFIG_MMU */
80 #endif /* __KERNEL__ */
82 #include <asm-generic/io.h>
84 #endif /* _XTENSA_IO_H */