| Songmao Tian | 42d226c | 2007-06-06 14:52:38 +0800 | [diff] [blame] | 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 | } |