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d475e3e4 GU |
1 | /***************************************************************************/ |
2 | ||
3 | /* | |
25985edc | 4 | * cache.c -- general ColdFire Cache maintenance code |
d475e3e4 GU |
5 | * |
6 | * Copyright (C) 2010, Greg Ungerer (gerg@snapgear.com) | |
7 | */ | |
8 | ||
9 | /***************************************************************************/ | |
10 | ||
11 | #include <linux/kernel.h> | |
12 | #include <asm/coldfire.h> | |
13 | #include <asm/mcfsim.h> | |
14 | ||
15 | /***************************************************************************/ | |
16 | #ifdef CACHE_PUSH | |
17 | /***************************************************************************/ | |
18 | ||
19 | /* | |
20 | * Use cpushl to push all dirty cache lines back to memory. | |
21 | * Older versions of GAS don't seem to know how to generate the | |
22 | * ColdFire cpushl instruction... Oh well, bit stuff it for now. | |
23 | */ | |
24 | ||
25 | void mcf_cache_push(void) | |
26 | { | |
27 | __asm__ __volatile__ ( | |
28 | "clrl %%d0\n\t" | |
29 | "1:\n\t" | |
30 | "movel %%d0,%%a0\n\t" | |
31 | "2:\n\t" | |
32 | ".word 0xf468\n\t" | |
33 | "addl %0,%%a0\n\t" | |
34 | "cmpl %1,%%a0\n\t" | |
35 | "blt 2b\n\t" | |
36 | "addql #1,%%d0\n\t" | |
37 | "cmpil %2,%%d0\n\t" | |
38 | "bne 1b\n\t" | |
39 | : /* No output */ | |
40 | : "i" (CACHE_LINE_SIZE), | |
41 | "i" (DCACHE_SIZE / CACHE_WAYS), | |
42 | "i" (CACHE_WAYS) | |
43 | : "d0", "a0" ); | |
44 | } | |
45 | ||
46 | /***************************************************************************/ | |
47 | #endif /* CACHE_PUSH */ | |
48 | /***************************************************************************/ |