LXR linux/arch/mips/include/asm/mach-tx49xx/ioremap.h

   1/*
   2 *      include/asm-mips/mach-tx49xx/ioremap.h
   3 *
   4 *      This program is free software; you can redistribute it and/or
   5 *      modify it under the terms of the GNU General Public License
   6 *      as published by the Free Software Foundation; either version
   7 *      2 of the License, or (at your option) any later version.
   8 */
   9#ifndef __ASM_MACH_TX49XX_IOREMAP_H
  10#define __ASM_MACH_TX49XX_IOREMAP_H
  11
  12#include <linux/types.h>
  13
  14/*
  15 * Allow physical addresses to be fixed up to help peripherals located
  16 * outside the low 32-bit range -- generic pass-through version.
  17 */
  18static inline phys_t fixup_bigphys_addr(phys_t phys_addr, phys_t size)
  19{
  20        return phys_addr;
  21}
  22
  23static inline void __iomem *plat_ioremap(phys_t offset, unsigned long size,
  24        unsigned long flags)
  25{
  26#ifdef CONFIG_64BIT
  27#define TXX9_DIRECTMAP_BASE     0xfff000000ul
  28#else
  29#define TXX9_DIRECTMAP_BASE     0xff000000ul
  30#endif
  31        if (offset >= TXX9_DIRECTMAP_BASE &&
  32            offset < TXX9_DIRECTMAP_BASE + 0x400000)
  33                return (void __iomem *)(unsigned long)(int)offset;
  34        return NULL;
  35}
  36
  37static inline int plat_iounmap(const volatile void __iomem *addr)
  38{
  39        return (unsigned long)addr >=
  40                (unsigned long)(int)(TXX9_DIRECTMAP_BASE & 0xffffffff);
  41}
  42
  43#endif /* __ASM_MACH_TX49XX_IOREMAP_H */
  44