release/src-rt-6.x/linux/linux-2.6/include/asm-arm/arch-ixp23xx/io.h

   1 /*
   2  * include/asm-arm/arch-ixp23xx/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 #include <linux/kernel.h>       /* For BUG */
  24
  25 static inline void __iomem *
  26 ixp23xx_ioremap(unsigned long addr, unsigned long size, unsigned int mtype)
  27 {
  28         if (addr >= IXP23XX_PCI_MEM_START &&
  29                 addr <= IXP23XX_PCI_MEM_START + IXP23XX_PCI_MEM_SIZE) {
  30                 if (addr + size > IXP23XX_PCI_MEM_START + IXP23XX_PCI_MEM_SIZE)
  31                         return NULL;
  32
  33                 return (void __iomem *)
  34                         ((addr - IXP23XX_PCI_MEM_START) + IXP23XX_PCI_MEM_VIRT);
  35         }
  36
  37         return __arm_ioremap(addr, size, mtype);
  38 }
  39
  40 static inline void
  41 ixp23xx_iounmap(void __iomem *addr)
  42 {
  43         if ((((u32)addr) >= IXP23XX_PCI_MEM_VIRT) &&
  44             (((u32)addr) < IXP23XX_PCI_MEM_VIRT + IXP23XX_PCI_MEM_SIZE))
  45                 return;
  46
  47         __iounmap(addr);
  48 }
  49
  50 #define __arch_ioremap(a,s,f)   ixp23xx_ioremap(a,s,f)
  51 #define __arch_iounmap(a)       ixp23xx_iounmap(a)
  52
  53
  54 #endif