| // SPDX-License-Identifier: GPL-2.0 |
| /***************************************************************************/ |
| |
| /* |
| * cache.c -- general ColdFire Cache maintenance code |
| * |
| * Copyright (C) 2010, Greg Ungerer (gerg@snapgear.com) |
| */ |
| |
| /***************************************************************************/ |
| |
| #include <linux/kernel.h> |
| #include <asm/coldfire.h> |
| #include <asm/mcfsim.h> |
| |
| /***************************************************************************/ |
| #ifdef CACHE_PUSH |
| /***************************************************************************/ |
| |
| /* |
| * Use cpushl to push all dirty cache lines back to memory. |
| * Older versions of GAS don't seem to know how to generate the |
| * ColdFire cpushl instruction... Oh well, bit stuff it for now. |
| */ |
| |
| void mcf_cache_push(void) |
| { |
| __asm__ __volatile__ ( |
| "clrl %%d0\n\t" |
| "1:\n\t" |
| "movel %%d0,%%a0\n\t" |
| "2:\n\t" |
| ".word 0xf468\n\t" |
| "addl %0,%%a0\n\t" |
| "cmpl %1,%%a0\n\t" |
| "blt 2b\n\t" |
| "addql #1,%%d0\n\t" |
| "cmpil %2,%%d0\n\t" |
| "bne 1b\n\t" |
| : /* No output */ |
| : "i" (CACHE_LINE_SIZE), |
| "i" (DCACHE_SIZE / CACHE_WAYS), |
| "i" (CACHE_WAYS) |
| : "d0", "a0" ); |
| } |
| |
| /***************************************************************************/ |
| #endif /* CACHE_PUSH */ |
| /***************************************************************************/ |
