arch/xtensa/include/asm/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  */
  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 */