1/* $NetBSD: footbridge_machdep.c,v 1.11 2021/08/17 22:00:27 andvar Exp $ */ 2 3/* 4 * Copyright (c) 1997 Mark Brinicombe. 5 * Copyright (c) 1997 Causality Limited 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by Mark Brinicombe 19 * for the NetBSD Project. 20 * 4. The name of the company nor the name of the author may be used to 21 * endorse or promote products derived from this software without specific 22 * prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 25 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 26 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 27 * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 28 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 29 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 30 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 */ 36 37#include <sys/cdefs.h> 38__KERNEL_RCSID(0, "$NetBSD: footbridge_machdep.c,v 1.11 2021/08/17 22:00:27 andvar Exp $"); 39 40#include <sys/param.h> 41#include <sys/systm.h> 42#include <uvm/uvm_extern.h> 43#include <machine/pmap.h> 44#include <arm/footbridge/footbridge.h> 45#include <arm/footbridge/dc21285mem.h> 46 47/* 48 * For optimal cache cleaning we need two 16K banks of 49 * virtual address space that NOTHING else will access 50 * and then we alternate the cache cleaning between the 51 * two banks. 52 * The cache cleaning code requires 2 banks aligned 53 * on total size boundary so the banks can be alternated by 54 * xorring the size bit (assumes the bank size is a power of 2) 55 * 56 * On the DC21285 we have a special cache clean area so we will 57 * use it. 58 */ 59 60extern unsigned int sa1_cache_clean_addr; 61extern unsigned int sa1_cache_clean_size; 62 63void 64footbridge_sa110_cc_setup(void) 65{ 66 sa1_cache_clean_addr = DC21285_CACHE_FLUSH_VBASE; 67 sa1_cache_clean_size = (PAGE_SIZE * 4); 68} 69