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

   1 /*
   2  * arch/arm/mach-shark/include/mach/io.h
   3  *
   4  * by Alexander Schulz
   5  *
   6  * derived from:
   7  * arch/arm/mach-ebsa110/include/mach/io.h
   8  * Copyright (C) 1997,1998 Russell King
   9  */
  10
  11 #ifndef __ASM_ARM_ARCH_IO_H
  12 #define __ASM_ARM_ARCH_IO_H
  13
  14 #include <mach/hardware.h>
  15
  16 #define IO_SPACE_LIMIT 0xffffffff
  17
  18 /*
  19  * We use two different types of addressing - PC style addresses, and ARM
  20  * addresses.  PC style accesses the PC hardware with the normal PC IO
  21  * addresses, eg 0x3f8 for serial#1.  ARM addresses are 0x80000000+
  22  * and are translated to the start of IO.
  23  */
  24 #define __PORT_PCIO(x)  (!((x) & 0x80000000))
  25
  26 #define __io(a)                 ((void __iomem *)(PCIO_BASE + (a)))
  27
  28
  29 static inline unsigned int __ioaddr (unsigned int port)                 \
  30 {                                                                               \
  31         if (__PORT_PCIO(port))                                                  \
  32                 return (unsigned int)(PCIO_BASE + (port));                      \
  33         else                                                                    \
  34                 return (unsigned int)(IO_BASE + (port));                        \
  35 }
  36
  37 #define __mem_pci(addr) (addr)
  38
  39 #endif