]>
Commit | Line | Data |
---|---|---|
b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
d475e3e4 GU |
2 | /***************************************************************************/ |
3 | ||
4 | /* | |
25985edc | 5 | * cache.c -- general ColdFire Cache maintenance code |
d475e3e4 GU |
6 | * |
7 | * Copyright (C) 2010, Greg Ungerer (gerg@snapgear.com) | |
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 | : /* No output */ | |
41 | : "i" (CACHE_LINE_SIZE), | |
42 | "i" (DCACHE_SIZE / CACHE_WAYS), | |
43 | "i" (CACHE_WAYS) | |
44 | : "d0", "a0" ); | |
45 | } | |
46 | ||
47 | /***************************************************************************/ | |
48 | #endif /* CACHE_PUSH */ | |
49 | /***************************************************************************/ |