115898edaSRafal Jaworowski /* $NetBSD: obio_space.c,v 1.6 2003/07/15 00:25:05 lukem Exp $ */ 215898edaSRafal Jaworowski 315898edaSRafal Jaworowski /*- 4af3dc4a7SPedro F. Giffuni * SPDX-License-Identifier: BSD-4-Clause 5af3dc4a7SPedro F. Giffuni * 615898edaSRafal Jaworowski * Copyright (c) 2001, 2002, 2003 Wasabi Systems, Inc. 715898edaSRafal Jaworowski * All rights reserved. 815898edaSRafal Jaworowski * 915898edaSRafal Jaworowski * Written by Jason R. Thorpe for Wasabi Systems, Inc. 1015898edaSRafal Jaworowski * 1115898edaSRafal Jaworowski * Redistribution and use in source and binary forms, with or without 1215898edaSRafal Jaworowski * modification, are permitted provided that the following conditions 1315898edaSRafal Jaworowski * are met: 1415898edaSRafal Jaworowski * 1. Redistributions of source code must retain the above copyright 1515898edaSRafal Jaworowski * notice, this list of conditions and the following disclaimer. 1615898edaSRafal Jaworowski * 2. Redistributions in binary form must reproduce the above copyright 1715898edaSRafal Jaworowski * notice, this list of conditions and the following disclaimer in the 1815898edaSRafal Jaworowski * documentation and/or other materials provided with the distribution. 1915898edaSRafal Jaworowski * 3. All advertising materials mentioning features or use of this software 2015898edaSRafal Jaworowski * must display the following acknowledgement: 2115898edaSRafal Jaworowski * This product includes software developed for the NetBSD Project by 2215898edaSRafal Jaworowski * Wasabi Systems, Inc. 2315898edaSRafal Jaworowski * 4. The name of Wasabi Systems, Inc. may not be used to endorse 2415898edaSRafal Jaworowski * or promote products derived from this software without specific prior 2515898edaSRafal Jaworowski * written permission. 2615898edaSRafal Jaworowski * 2715898edaSRafal Jaworowski * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND 2815898edaSRafal Jaworowski * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 2915898edaSRafal Jaworowski * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 3015898edaSRafal Jaworowski * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC 3115898edaSRafal Jaworowski * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 3215898edaSRafal Jaworowski * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 3315898edaSRafal Jaworowski * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 3415898edaSRafal Jaworowski * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 3515898edaSRafal Jaworowski * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 3615898edaSRafal Jaworowski * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 3715898edaSRafal Jaworowski * POSSIBILITY OF SUCH DAMAGE. 3815898edaSRafal Jaworowski */ 3915898edaSRafal Jaworowski 4015898edaSRafal Jaworowski #include <sys/cdefs.h> 4115898edaSRafal Jaworowski __FBSDID("$FreeBSD$"); 4215898edaSRafal Jaworowski 4315898edaSRafal Jaworowski #include <sys/param.h> 4415898edaSRafal Jaworowski #include <sys/systm.h> 4515898edaSRafal Jaworowski #include <sys/bus.h> 4615898edaSRafal Jaworowski #include <sys/kernel.h> 4715898edaSRafal Jaworowski #include <sys/malloc.h> 4830b72b68SRuslan Bukin #include <sys/devmap.h> 4915898edaSRafal Jaworowski 5015898edaSRafal Jaworowski #include <vm/vm.h> 5115898edaSRafal Jaworowski #include <vm/pmap.h> 5215898edaSRafal Jaworowski #include <vm/vm_kern.h> 5315898edaSRafal Jaworowski #include <vm/vm_extern.h> 5415898edaSRafal Jaworowski 5515898edaSRafal Jaworowski #include <machine/bus.h> 56b07d0cbcSIan Lepore #include <machine/cpufunc.h> 5715898edaSRafal Jaworowski 582737497bSIan Lepore void 592737497bSIan Lepore generic_bs_unimplemented(void) 602737497bSIan Lepore { 612737497bSIan Lepore 622737497bSIan Lepore panic("unimplemented bus_space function called"); 632737497bSIan Lepore } 642737497bSIan Lepore 6515898edaSRafal Jaworowski /* Prototypes for all the bus_space structure functions */ 6615898edaSRafal Jaworowski bs_protos(generic); 6715898edaSRafal Jaworowski 6815898edaSRafal Jaworowski int 694098ccafSIan Lepore generic_bs_map(bus_space_tag_t t, bus_addr_t bpa, bus_size_t size, int flags, 7015898edaSRafal Jaworowski bus_space_handle_t *bshp) 7115898edaSRafal Jaworowski { 7213a98c85SIan Lepore void *va; 7315898edaSRafal Jaworowski 7413a98c85SIan Lepore /* 7513a98c85SIan Lepore * We don't even examine the passed-in flags. For ARM, the CACHEABLE 761413a3abSSvatopluk Kraus * flag doesn't make sense (we create VM_MEMATTR_DEVICE mappings), and 771413a3abSSvatopluk Kraus * the LINEAR flag is just implied because we use kva_alloc(size). 7813a98c85SIan Lepore */ 7913a98c85SIan Lepore if ((va = pmap_mapdev(bpa, size)) == NULL) 8015898edaSRafal Jaworowski return (ENOMEM); 8113a98c85SIan Lepore *bshp = (bus_space_handle_t)va; 8215898edaSRafal Jaworowski return (0); 8315898edaSRafal Jaworowski } 8415898edaSRafal Jaworowski 8515898edaSRafal Jaworowski int 864098ccafSIan Lepore generic_bs_alloc(bus_space_tag_t t, bus_addr_t rstart, bus_addr_t rend, bus_size_t size, 8715898edaSRafal Jaworowski bus_size_t alignment, bus_size_t boundary, int flags, bus_addr_t *bpap, 8815898edaSRafal Jaworowski bus_space_handle_t *bshp) 8915898edaSRafal Jaworowski { 9015898edaSRafal Jaworowski 9115898edaSRafal Jaworowski panic("generic_bs_alloc(): not implemented"); 9215898edaSRafal Jaworowski } 9315898edaSRafal Jaworowski 9415898edaSRafal Jaworowski void 954098ccafSIan Lepore generic_bs_unmap(bus_space_tag_t t, bus_space_handle_t h, bus_size_t size) 9615898edaSRafal Jaworowski { 9715898edaSRafal Jaworowski 987ae99f80SJohn Baldwin pmap_unmapdev((void *)h, size); 9915898edaSRafal Jaworowski } 10015898edaSRafal Jaworowski 10115898edaSRafal Jaworowski void 1024098ccafSIan Lepore generic_bs_free(bus_space_tag_t t, bus_space_handle_t bsh, bus_size_t size) 10315898edaSRafal Jaworowski { 10415898edaSRafal Jaworowski 10515898edaSRafal Jaworowski panic("generic_bs_free(): not implemented"); 10615898edaSRafal Jaworowski } 10715898edaSRafal Jaworowski 10815898edaSRafal Jaworowski int 1094098ccafSIan Lepore generic_bs_subregion(bus_space_tag_t t, bus_space_handle_t bsh, bus_size_t offset, 11015898edaSRafal Jaworowski bus_size_t size, bus_space_handle_t *nbshp) 11115898edaSRafal Jaworowski { 11215898edaSRafal Jaworowski 11315898edaSRafal Jaworowski *nbshp = bsh + offset; 11415898edaSRafal Jaworowski return (0); 11515898edaSRafal Jaworowski } 11615898edaSRafal Jaworowski 11715898edaSRafal Jaworowski void 1184098ccafSIan Lepore generic_bs_barrier(bus_space_tag_t t, bus_space_handle_t bsh, bus_size_t offset, 11915898edaSRafal Jaworowski bus_size_t len, int flags) 12015898edaSRafal Jaworowski { 12115898edaSRafal Jaworowski 122b07d0cbcSIan Lepore /* 123b07d0cbcSIan Lepore * dsb() will drain the L1 write buffer and establish a memory access 124b07d0cbcSIan Lepore * barrier point on platforms where that has meaning. On a write we 125b07d0cbcSIan Lepore * also need to drain the L2 write buffer, because most on-chip memory 126b07d0cbcSIan Lepore * mapped devices are downstream of the L2 cache. Note that this needs 127b07d0cbcSIan Lepore * to be done even for memory mapped as Device type, because while 128b07d0cbcSIan Lepore * Device memory is not cached, writes to it are still buffered. 129b07d0cbcSIan Lepore */ 130b07d0cbcSIan Lepore dsb(); 131b07d0cbcSIan Lepore if (flags & BUS_SPACE_BARRIER_WRITE) { 132b07d0cbcSIan Lepore cpu_l2cache_drain_writebuf(); 133b07d0cbcSIan Lepore } 13415898edaSRafal Jaworowski } 135