arch/mips/lemote/lm2e/mem.c

   1 /*
   2  * This program is free software; you can redistribute  it and/or modify it
   3  * under  the terms of  the GNU General  Public License as published by the
   4  * Free Software Foundation;  either version 2 of the  License, or (at your
   5  * option) any later version.
   6  */
   7 #include <linux/fs.h>
   8 #include <linux/fcntl.h>
   9 #include <linux/mm.h>
  10
  11 /* override of arch/mips/mm/cache.c: __uncached_access */
  12 int __uncached_access(struct file *file, unsigned long addr)
  13 {
  14         if (file->f_flags & O_SYNC)
  15                 return 1;
  16
  17         /*
  18          * On the Lemote Loongson 2e system, the peripheral registers
  19          * reside between 0x1000:0000 and 0x2000:0000.
  20          */
  21         return addr >= __pa(high_memory) ||
  22                 ((addr >= 0x10000000) && (addr < 0x20000000));
  23 }