1 /* $NetBSD: cache_r3k.c,v 1.2 2001/11/14 18:26:23 thorpej 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/param.h> 39 40 #include <mips/cache.h> 41 #include <mips/cache_r3k.h> 42 43 /* 44 * Cache operations for R3000-style caches: 45 * 46 * - Direct-mapped 47 * - Write-through 48 * - Physically indexed, physically tagged 49 */ 50 51 #define round_line(x) (((x) + 31) & ~31) 52 #define trunc_line(x) ((x) & ~31) 53 54 void 55 r3k_icache_sync_all(void) 56 { 57 vaddr_t va = MIPS_PHYS_TO_KSEG0(0); 58 vaddr_t eva = va + mips_picache_size; 59 60 r3k_picache_do_inv(va, eva); 61 } 62 63 void 64 r3k_icache_sync_range(vaddr_t va, vsize_t size) 65 { 66 vaddr_t eva = round_line(va + size); 67 68 va = trunc_line(va); 69 70 if ((eva - va) >= mips_picache_size) { 71 r3k_icache_sync_all(); 72 return; 73 } 74 75 r3k_picache_do_inv(va, eva); 76 } 77 78 void 79 r3k_pdcache_wbinv_all(void) 80 { 81 vaddr_t va = MIPS_PHYS_TO_KSEG0(0); 82 vaddr_t eva = va + mips_pdcache_size; 83 84 /* Cache is write-through. */ 85 86 r3k_pdcache_do_inv(va, eva); 87 } 88 89 void 90 r3k_pdcache_inv_range(vaddr_t va, vsize_t size) 91 { 92 vaddr_t eva = round_line(va + size); 93 94 va = trunc_line(va); 95 96 if ((eva - va) >= mips_pdcache_size) { 97 r3k_pdcache_wbinv_all(); 98 return; 99 } 100 101 r3k_pdcache_do_inv(va, eva); 102 } 103 104 void 105 r3k_pdcache_wb_range(vaddr_t va, vsize_t size) 106 { 107 108 /* Cache is write-though. */ 109 } 110 111 #undef round_line 112 #undef trunc_line 113