WIP FPC-III support
[linux/fpc-iii.git] / arch / xtensa / include / asm / io.h
blob54188e69b988ccaa5347b76f1dc0638906cb2239
1 /*
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
6 * for more details.
8 * Copyright (C) 2001 - 2005 Tensilica Inc.
9 */
11 #ifndef _XTENSA_IO_H
12 #define _XTENSA_IO_H
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>
20 #include <linux/types.h>
22 #define IOADDR(x) (XCHAL_KIO_BYPASS_VADDR + (x))
23 #define IO_SPACE_LIMIT ~0
24 #define PCI_IOBASE ((void __iomem *)XCHAL_KIO_BYPASS_VADDR)
26 #ifdef CONFIG_MMU
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(unsigned long offset, unsigned long size)
37 if (offset >= XCHAL_KIO_PADDR
38 && offset - XCHAL_KIO_PADDR < XCHAL_KIO_SIZE)
39 return (void*)(offset-XCHAL_KIO_PADDR+XCHAL_KIO_BYPASS_VADDR);
40 else
41 return xtensa_ioremap_nocache(offset, size);
44 static inline void __iomem *ioremap_cache(unsigned long offset,
45 unsigned long size)
47 if (offset >= XCHAL_KIO_PADDR
48 && offset - XCHAL_KIO_PADDR < XCHAL_KIO_SIZE)
49 return (void*)(offset-XCHAL_KIO_PADDR+XCHAL_KIO_CACHED_VADDR);
50 else
51 return xtensa_ioremap_cache(offset, size);
53 #define ioremap_cache ioremap_cache
55 static inline void iounmap(volatile void __iomem *addr)
57 unsigned long va = (unsigned long) addr;
59 if (!(va >= XCHAL_KIO_CACHED_VADDR &&
60 va - XCHAL_KIO_CACHED_VADDR < XCHAL_KIO_SIZE) &&
61 !(va >= XCHAL_KIO_BYPASS_VADDR &&
62 va - XCHAL_KIO_BYPASS_VADDR < XCHAL_KIO_SIZE))
63 xtensa_iounmap(addr);
66 #define virt_to_bus virt_to_phys
67 #define bus_to_virt phys_to_virt
69 #endif /* CONFIG_MMU */
71 #include <asm-generic/io.h>
73 #endif /* _XTENSA_IO_H */