root/arch/xtensa/include/asm/io.h

INCLUDED FROM

DEFINITIONS

1. ioremap_nocache
2. ioremap_cache
3. ioremap
4. iounmap

   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 
  20 #include <linux/types.h>
  21 
  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)
  25 
  26 #ifdef CONFIG_MMU
  27 
  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);
  31 
  32 /*
  33  * Return the virtual address for the specified bus memory.
  34  */
  35 static inline void __iomem *ioremap_nocache(unsigned long offset,
  36                 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 xtensa_ioremap_nocache(offset, size);
  43 }
  44 
  45 static inline void __iomem *ioremap_cache(unsigned long offset,
  46                 unsigned long size)
  47 {
  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);
  51         else
  52                 return xtensa_ioremap_cache(offset, size);
  53 }
  54 #define ioremap_cache ioremap_cache
  55 #define ioremap_nocache ioremap_nocache
  56 
  57 #define ioremap_wc ioremap_nocache
  58 #define ioremap_wt ioremap_nocache
  59 
  60 static inline void __iomem *ioremap(unsigned long offset, unsigned long size)
  61 {
  62         return ioremap_nocache(offset, size);
  63 }
  64 
  65 static inline void iounmap(volatile void __iomem *addr)
  66 {
  67         unsigned long va = (unsigned long) addr;
  68 
  69         if (!(va >= XCHAL_KIO_CACHED_VADDR &&
  70               va - XCHAL_KIO_CACHED_VADDR < XCHAL_KIO_SIZE) &&
  71             !(va >= XCHAL_KIO_BYPASS_VADDR &&
  72               va - XCHAL_KIO_BYPASS_VADDR < XCHAL_KIO_SIZE))
  73                 xtensa_iounmap(addr);
  74 }
  75 
  76 #define virt_to_bus     virt_to_phys
  77 #define bus_to_virt     phys_to_virt
  78 
  79 #endif /* CONFIG_MMU */
  80 
  81 #include <asm-generic/io.h>
  82 
  83 #endif  /* _XTENSA_IO_H */