| 1 | #include <linux/kernel.h> |
| 2 | #include <linux/module.h> |
| 3 | |
| 4 | int init_module() |
| 5 | { |
| 6 | unsigned tmp; |
| 7 | |
| 8 | /* Disable cache */ |
| 9 | |
| 10 | asm volatile ("movl %%cr0, %0\n\t" |
| 11 | "orl $0x40000000, %0\n\t" |
| 12 | "wbinvd\n\t" |
| 13 | "movl %0, %%cr0\n\t" |
| 14 | "wbinvd\n\t" |
| 15 | : "=r" (tmp) : : "memory"); |
| 16 | |
| 17 | return 0; |
| 18 | } |
| 19 | |
| 20 | void cleanup_module() |
| 21 | { |
| 22 | unsigned tmp; |
| 23 | |
| 24 | asm volatile ("movl %%cr0, %0\n\t" |
| 25 | "andl $0xbfffffff, %0\n\t" |
| 26 | "wbinvd\n\t" |
| 27 | "movl %0, %%cr0\n\t" |
| 28 | "wbinvd\n\t" |
| 29 | : "=r" (tmp) : : "memory"); |
| 30 | } |