projects / mirror_ubuntu-zesty-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 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 | /***************************************************************************/ |