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mem.c

/*
 * This program is free software; you can redistribute  it and/or modify it
 * under  the terms of  the GNU General  Public License as published by the
 * Free Software Foundation;  either version 2 of the  License, or (at your
 * option) any later version.
 */
#include <linux/fs.h>
#include <linux/fcntl.h>
#include <linux/mm.h>

/* override of arch/mips/mm/cache.c: __uncached_access */
int __uncached_access(struct file *file, unsigned long addr)
{
      if (file->f_flags & O_SYNC)
            return 1;

      /*
       * On the Lemote Loongson 2e system, the peripheral registers
       * reside between 0x1000:0000 and 0x2000:0000.
       */
      return addr >= __pa(high_memory) ||
            ((addr >= 0x10000000) && (addr < 0x20000000));
}

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