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

   1 /*
   2  * DaVinci IO address definitions
   3  *
   4  * Copied from include/asm/arm/arch-omap/io.h
   5  *
   6  * 2007 (c) MontaVista Software, Inc. This file is licensed under
   7  * the terms of the GNU General Public License version 2. This program
   8  * is licensed "as is" without any warranty of any kind, whether express
   9  * or implied.
  10  */
  11 #ifndef __ASM_ARCH_IO_H
  12 #define __ASM_ARCH_IO_H
  13
  14 #define IO_SPACE_LIMIT 0xffffffff
  15
  16 /*
  17  * ----------------------------------------------------------------------------
  18  * I/O mapping
  19  * ----------------------------------------------------------------------------
  20  */
  21 #define IO_PHYS         0x01c00000
  22 #define IO_OFFSET       0xfd000000 /* Virtual IO = 0xfec00000 */
  23 #define IO_SIZE         0x00400000
  24 #define IO_VIRT         (IO_PHYS + IO_OFFSET)
  25 #define io_v2p(va)      ((va) - IO_OFFSET)
  26 #define __IO_ADDRESS(x) ((x) + IO_OFFSET)
  27
  28 /*
  29  * We don't actually have real ISA nor PCI buses, but there is so many
  30  * drivers out there that might just work if we fake them...
  31  */
  32 #define __io(a)                 __typesafe_io(a)
  33 #define __mem_pci(a)            (a)
  34 #define __mem_isa(a)            (a)
  35
  36 #define IO_ADDRESS(pa)          IOMEM(__IO_ADDRESS(pa))
  37
  38 #ifdef __ASSEMBLER__
  39 #define IOMEM(x)                x
  40 #else
  41 #define IOMEM(x)                ((void __force __iomem *)(x))
  42
  43 /*
  44  * Functions to access the DaVinci IO region
  45  *
  46  * NOTE: - Use davinci_read/write[bwl] for physical register addresses
  47  *       - Use __raw_read/write[bwl]() for virtual register addresses
  48  *       - Use IO_ADDRESS(phys_addr) to convert registers to virtual addresses
  49  *       - DO NOT use hardcoded virtual addresses to allow changing the
  50  *         IO address space again if needed
  51  */
  52 #define davinci_readb(a)        __raw_readb(IO_ADDRESS(a))
  53 #define davinci_readw(a)        __raw_readw(IO_ADDRESS(a))
  54 #define davinci_readl(a)        __raw_readl(IO_ADDRESS(a))
  55
  56 #define davinci_writeb(v, a)    __raw_writeb(v, IO_ADDRESS(a))
  57 #define davinci_writew(v, a)    __raw_writew(v, IO_ADDRESS(a))
  58 #define davinci_writel(v, a)    __raw_writel(v, IO_ADDRESS(a))
  59
  60 #endif /* __ASSEMBLER__ */
  61 #endif /* __ASM_ARCH_IO_H */