arch/arm/mach-ixp23xx/include/mach/io.h

   1 /*
   2  * arch/arm/mach-ixp23xx/include/mach/io.h
   3  *
   4  * Original Author: Naeem M Afzal <naeem.m.afzal@intel.com>
   5  * Maintainer: Deepak Saxena <dsaxena@plexity.net>
   6  *
   7  * Copyright (C) 2003-2005 Intel Corp.
   8  * Copyright (C) 2005 MontaVista Software, Inc
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License version 2 as
  12  * published by the Free Software Foundation.
  13  */
  14
  15 #ifndef __ASM_ARCH_IO_H
  16 #define __ASM_ARCH_IO_H
  17
  18 #define IO_SPACE_LIMIT 0xffffffff
  19
  20 #define __io(p)         ((void __iomem*)((p) + IXP23XX_PCI_IO_VIRT))
  21 #define __mem_pci(a)    (a)
  22
  23 static inline void __iomem *
  24 ixp23xx_ioremap(unsigned long addr, unsigned long size, unsigned int mtype)
  25 {
  26         if (addr >= IXP23XX_PCI_MEM_START &&
  27                 addr <= IXP23XX_PCI_MEM_START + IXP23XX_PCI_MEM_SIZE) {
  28                 if (addr + size > IXP23XX_PCI_MEM_START + IXP23XX_PCI_MEM_SIZE)
  29                         return NULL;
  30
  31                 return (void __iomem *)
  32                         ((addr - IXP23XX_PCI_MEM_START) + IXP23XX_PCI_MEM_VIRT);
  33         }
  34
  35         return __arm_ioremap(addr, size, mtype);
  36 }
  37
  38 static inline void
  39 ixp23xx_iounmap(void __iomem *addr)
  40 {
  41         if ((((u32)addr) >= IXP23XX_PCI_MEM_VIRT) &&
  42             (((u32)addr) < IXP23XX_PCI_MEM_VIRT + IXP23XX_PCI_MEM_SIZE))
  43                 return;
  44
  45         __iounmap(addr);
  46 }
  47
  48 #define __arch_ioremap(a,s,f)   ixp23xx_ioremap(a,s,f)
  49 #define __arch_iounmap(a)       ixp23xx_iounmap(a)
  50
  51
  52 #endif