| 1 | |
| 2 |
|
| 3 |
|
| 4 | |
| 5 | * cache.c -- general ColdFire Cache maintenance code
|
| 6 | *
|
| 7 | * Copyright (C) 2010, Greg Ungerer ([email protected])
|
| 8 |
|
| 9 |
|
| 10 |
|
| 11 |
|
| 12 | #include <linux/kernel.h>
|
| 13 | #include <asm/coldfire.h>
|
| 14 | #include <asm/mcfsim.h>
|
| 15 |
|
| 16 |
|
| 17 | #ifdef CACHE_PUSH
|
| 18 |
|
| 19 |
|
| 20 | |
| 21 | * Use cpushl to push all dirty cache lines back to memory.
|
| 22 | * Older versions of GAS don't seem to know how to generate the
|
| 23 | * ColdFire cpushl instruction... Oh well, bit stuff it for now.
|
| 24 |
|
| 25 |
|
| 26 | void mcf_cache_push(void)
|
| 27 | {
|
| 28 | __asm__ __volatile__ (
|
| 29 | "clrl %%d0\n\t"
|
| 30 | "1:\n\t"
|
| 31 | "movel %%d0,%%a0\n\t"
|
| 32 | "2:\n\t"
|
| 33 | ".word 0xf468\n\t"
|
| 34 | "addl %0,%%a0\n\t"
|
| 35 | "cmpl %1,%%a0\n\t"
|
| 36 | "blt 2b\n\t"
|
| 37 | "addql #1,%%d0\n\t"
|
| 38 | "cmpil %2,%%d0\n\t"
|
| 39 | "bne 1b\n\t"
|
| 40 | :
|
| 41 | : "i" (CACHE_LINE_SIZE),
|
| 42 | "i" (DCACHE_SIZE / CACHE_WAYS),
|
| 43 | "i" (CACHE_WAYS)
|
| 44 | : "d0", "a0" );
|
| 45 | }
|
| 46 |
|
| 47 |
|
| 48 | #endif
|
| 49 |
|