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      1 /*	$NetBSD: cache_r3k.c,v 1.7 2016/07/11 16:15:36 matt 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 <sys/cdefs.h>
     39 __KERNEL_RCSID(0, "$NetBSD: cache_r3k.c,v 1.7 2016/07/11 16:15:36 matt Exp $");
     40 
     41 #include <sys/param.h>
     42 
     43 #include <mips/cpuregs.h>
     44 #include <mips/cache.h>
     45 #include <mips/cache_r3k.h>
     46 
     47 /*
     48  * Cache operations for R3000-style caches:
     49  *
     50  *	- Direct-mapped
     51  *	- Write-through
     52  *	- Physically indexed, physically tagged
     53  */
     54 
     55 #define	round_line(x)		(((x) + 31) & ~31)
     56 #define	trunc_line(x)		((x) & ~31)
     57 
     58 void
     59 r3k_icache_sync_all(void)
     60 {
     61 	vaddr_t va = MIPS_PHYS_TO_KSEG0(0);
     62 	vaddr_t eva = va + mips_cache_info.mci_picache_size;
     63 
     64 	r3k_picache_do_inv(va, eva);
     65 }
     66 
     67 void
     68 r3k_icache_sync_range(register_t va, vsize_t size)
     69 {
     70 	vaddr_t eva = round_line(va + size);
     71 
     72 	va = trunc_line(va);
     73 
     74 	if ((eva - va) >= mips_cache_info.mci_picache_size) {
     75 		r3k_icache_sync_all();
     76 		return;
     77 	}
     78 
     79 	r3k_picache_do_inv(va, eva);
     80 }
     81 
     82 void
     83 r3k_pdcache_wbinv_all(void)
     84 {
     85 	vaddr_t va = MIPS_PHYS_TO_KSEG0(0);
     86 	vaddr_t eva = va + mips_cache_info.mci_pdcache_size;
     87 
     88 	/* Cache is write-through. */
     89 
     90 	r3k_pdcache_do_inv(va, eva);
     91 }
     92 
     93 void
     94 r3k_pdcache_inv_range(register_t va, vsize_t size)
     95 {
     96 	vaddr_t eva = round_line(va + size);
     97 
     98 	va = trunc_line(va);
     99 
    100 	if ((eva - va) >= mips_cache_info.mci_pdcache_size) {
    101 		r3k_pdcache_wbinv_all();
    102 		return;
    103 	}
    104 
    105 	r3k_pdcache_do_inv(va, eva);
    106 }
    107 
    108 void
    109 r3k_pdcache_wb_range(register_t va, vsize_t size)
    110 {
    111 
    112 	/* Cache is write-though. */
    113 }
    114 
    115 #undef round_line
    116 #undef trunc_line
    117