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      1 /*	$NetBSD: cache.c,v 1.2 2007/10/30 16:38:54 tsutsui Exp $	*/
      2 
      3 /*
      4  * Copyright 2001 Wasabi Systems, Inc.
      5  * All rights reserved.
      6  *
      7  * Written by Jason R. Thorpe for Wasabi Systems, Inc.
      8  *
      9  * Redistribution and use in source and binary forms, with or without
     10  * modification, are permitted provided that the following conditions
     11  * are met:
     12  * 1. Redistributions of source code must retain the above copyright
     13  *    notice, this list of conditions and the following disclaimer.
     14  * 2. Redistributions in binary form must reproduce the above copyright
     15  *    notice, this list of conditions and the following disclaimer in the
     16  *    documentation and/or other materials provided with the distribution.
     17  * 3. All advertising materials mentioning features or use of this software
     18  *    must display the following acknowledgement:
     19  *      This product includes software developed for the NetBSD Project by
     20  *      Wasabi Systems, Inc.
     21  * 4. The name of Wasabi Systems, Inc. may not be used to endorse
     22  *    or promote products derived from this software without specific prior
     23  *    written permission.
     24  *
     25  * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
     26  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     27  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     28  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL WASABI SYSTEMS, INC
     29  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     30  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     31  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     32  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     33  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     34  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     35  * POSSIBILITY OF SUCH DAMAGE.
     36  */
     37 
     38 #include <lib/libsa/stand.h>
     39 #include <lib/libkern/libkern.h>
     40 
     41 #include <mips/cpuregs.h>
     42 #include <mips/cache_r4k.h>
     43 
     44 #include "boot.h"
     45 
     46 #define round_line(x)	(((x) + (CACHELINESIZE - 1)) & ~(CACHELINESIZE - 1))
     47 #define trunc_line(x)	((x) & ~(CACHELINESIZE - 1))
     48 
     49 __asm(".set mips3");
     50 
     51 void
     52 pdcache_inv(uint32_t va, u_int size)
     53 {
     54 	uint32_t eva;
     55 
     56 	eva = round_line(va + size);
     57 	va  = trunc_line(va);
     58 
     59 	while (va < eva) {
     60 		cache_op_r4k_line(va, CACHE_R4K_D|CACHEOP_R4K_HIT_INV);
     61 		va += CACHELINESIZE;
     62 	}
     63 }
     64 
     65 void
     66 pdcache_wb(uint32_t va, u_int size)
     67 {
     68 	uint32_t eva;
     69 
     70 	eva = round_line(va + size);
     71 	va  = trunc_line(va);
     72 
     73 	while (va < eva) {
     74 		cache_op_r4k_line(va, CACHE_R4K_D|CACHEOP_R4K_HIT_WB);
     75 		va += CACHELINESIZE;
     76 	}
     77 }
     78 
     79 void
     80 pdcache_wbinv(uint32_t va, u_int size)
     81 {
     82 	uint32_t eva;
     83 
     84 	eva = round_line(va + size);
     85 	va  = trunc_line(va);
     86 
     87 	while (va < eva) {
     88 		cache_op_r4k_line(va, CACHE_R4K_D|CACHEOP_R4K_HIT_WB_INV);
     89 		va += CACHELINESIZE;
     90 	}
     91 }
     92