115898edaSRafal Jaworowski /* $NetBSD: obio_space.c,v 1.6 2003/07/15 00:25:05 lukem Exp $ */ 215898edaSRafal Jaworowski 315898edaSRafal Jaworowski /*- 415898edaSRafal Jaworowski * Copyright (c) 2001, 2002, 2003 Wasabi Systems, Inc. 515898edaSRafal Jaworowski * All rights reserved. 615898edaSRafal Jaworowski * 715898edaSRafal Jaworowski * Written by Jason R. Thorpe for Wasabi Systems, Inc. 815898edaSRafal Jaworowski * 915898edaSRafal Jaworowski * Redistribution and use in source and binary forms, with or without 1015898edaSRafal Jaworowski * modification, are permitted provided that the following conditions 1115898edaSRafal Jaworowski * are met: 1215898edaSRafal Jaworowski * 1. Redistributions of source code must retain the above copyright 1315898edaSRafal Jaworowski * notice, this list of conditions and the following disclaimer. 1415898edaSRafal Jaworowski * 2. Redistributions in binary form must reproduce the above copyright 1515898edaSRafal Jaworowski * notice, this list of conditions and the following disclaimer in the 1615898edaSRafal Jaworowski * documentation and/or other materials provided with the distribution. 1715898edaSRafal Jaworowski * 3. All advertising materials mentioning features or use of this software 1815898edaSRafal Jaworowski * must display the following acknowledgement: 1915898edaSRafal Jaworowski * This product includes software developed for the NetBSD Project by 2015898edaSRafal Jaworowski * Wasabi Systems, Inc. 2115898edaSRafal Jaworowski * 4. The name of Wasabi Systems, Inc. may not be used to endorse 2215898edaSRafal Jaworowski * or promote products derived from this software without specific prior 2315898edaSRafal Jaworowski * written permission. 2415898edaSRafal Jaworowski * 2515898edaSRafal Jaworowski * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND 2615898edaSRafal Jaworowski * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 2715898edaSRafal Jaworowski * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 2815898edaSRafal Jaworowski * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC 2915898edaSRafal Jaworowski * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 3015898edaSRafal Jaworowski * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 3115898edaSRafal Jaworowski * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 3215898edaSRafal Jaworowski * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 3315898edaSRafal Jaworowski * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 3415898edaSRafal Jaworowski * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 3515898edaSRafal Jaworowski * POSSIBILITY OF SUCH DAMAGE. 3615898edaSRafal Jaworowski */ 3715898edaSRafal Jaworowski 3815898edaSRafal Jaworowski #include <sys/cdefs.h> 3915898edaSRafal Jaworowski __FBSDID("$FreeBSD$"); 4015898edaSRafal Jaworowski 4115898edaSRafal Jaworowski #include <sys/param.h> 4215898edaSRafal Jaworowski #include <sys/systm.h> 4315898edaSRafal Jaworowski #include <sys/bus.h> 4415898edaSRafal Jaworowski #include <sys/kernel.h> 4515898edaSRafal Jaworowski #include <sys/malloc.h> 4615898edaSRafal Jaworowski 4715898edaSRafal Jaworowski #include <vm/vm.h> 4815898edaSRafal Jaworowski #include <vm/pmap.h> 4915898edaSRafal Jaworowski #include <vm/vm_kern.h> 5015898edaSRafal Jaworowski #include <vm/vm_extern.h> 5115898edaSRafal Jaworowski 5215898edaSRafal Jaworowski #include <machine/bus.h> 53b07d0cbcSIan Lepore #include <machine/cpufunc.h> 5413a98c85SIan Lepore #include <machine/devmap.h> 5515898edaSRafal Jaworowski 562737497bSIan Lepore void 572737497bSIan Lepore generic_bs_unimplemented(void) 582737497bSIan Lepore { 592737497bSIan Lepore 602737497bSIan Lepore panic("unimplemented bus_space function called"); 612737497bSIan Lepore } 622737497bSIan Lepore 6315898edaSRafal Jaworowski /* Prototypes for all the bus_space structure functions */ 6415898edaSRafal Jaworowski bs_protos(generic); 6515898edaSRafal Jaworowski 6615898edaSRafal Jaworowski int 674098ccafSIan Lepore generic_bs_map(bus_space_tag_t t, bus_addr_t bpa, bus_size_t size, int flags, 6815898edaSRafal Jaworowski bus_space_handle_t *bshp) 6915898edaSRafal Jaworowski { 7013a98c85SIan Lepore void *va; 7115898edaSRafal Jaworowski 7213a98c85SIan Lepore /* 7313a98c85SIan Lepore * We don't even examine the passed-in flags. For ARM, the CACHEABLE 741413a3abSSvatopluk Kraus * flag doesn't make sense (we create VM_MEMATTR_DEVICE mappings), and 751413a3abSSvatopluk Kraus * the LINEAR flag is just implied because we use kva_alloc(size). 7613a98c85SIan Lepore */ 7713a98c85SIan Lepore if ((va = pmap_mapdev(bpa, size)) == NULL) 7815898edaSRafal Jaworowski return (ENOMEM); 7913a98c85SIan Lepore *bshp = (bus_space_handle_t)va; 8015898edaSRafal Jaworowski return (0); 8115898edaSRafal Jaworowski } 8215898edaSRafal Jaworowski 8315898edaSRafal Jaworowski int 844098ccafSIan Lepore generic_bs_alloc(bus_space_tag_t t, bus_addr_t rstart, bus_addr_t rend, bus_size_t size, 8515898edaSRafal Jaworowski bus_size_t alignment, bus_size_t boundary, int flags, bus_addr_t *bpap, 8615898edaSRafal Jaworowski bus_space_handle_t *bshp) 8715898edaSRafal Jaworowski { 8815898edaSRafal Jaworowski 8915898edaSRafal Jaworowski panic("generic_bs_alloc(): not implemented"); 9015898edaSRafal Jaworowski } 9115898edaSRafal Jaworowski 9215898edaSRafal Jaworowski 9315898edaSRafal Jaworowski void 944098ccafSIan Lepore generic_bs_unmap(bus_space_tag_t t, bus_space_handle_t h, bus_size_t size) 9515898edaSRafal Jaworowski { 9615898edaSRafal Jaworowski 9713a98c85SIan Lepore pmap_unmapdev((vm_offset_t)h, size); 9815898edaSRafal Jaworowski } 9915898edaSRafal Jaworowski 10015898edaSRafal Jaworowski void 1014098ccafSIan Lepore generic_bs_free(bus_space_tag_t t, bus_space_handle_t bsh, bus_size_t size) 10215898edaSRafal Jaworowski { 10315898edaSRafal Jaworowski 10415898edaSRafal Jaworowski panic("generic_bs_free(): not implemented"); 10515898edaSRafal Jaworowski } 10615898edaSRafal Jaworowski 10715898edaSRafal Jaworowski int 1084098ccafSIan Lepore generic_bs_subregion(bus_space_tag_t t, bus_space_handle_t bsh, bus_size_t offset, 10915898edaSRafal Jaworowski bus_size_t size, bus_space_handle_t *nbshp) 11015898edaSRafal Jaworowski { 11115898edaSRafal Jaworowski 11215898edaSRafal Jaworowski *nbshp = bsh + offset; 11315898edaSRafal Jaworowski return (0); 11415898edaSRafal Jaworowski } 11515898edaSRafal Jaworowski 11615898edaSRafal Jaworowski void 1174098ccafSIan Lepore generic_bs_barrier(bus_space_tag_t t, bus_space_handle_t bsh, bus_size_t offset, 11815898edaSRafal Jaworowski bus_size_t len, int flags) 11915898edaSRafal Jaworowski { 12015898edaSRafal Jaworowski 121b07d0cbcSIan Lepore /* 122b07d0cbcSIan Lepore * dsb() will drain the L1 write buffer and establish a memory access 123b07d0cbcSIan Lepore * barrier point on platforms where that has meaning. On a write we 124b07d0cbcSIan Lepore * also need to drain the L2 write buffer, because most on-chip memory 125b07d0cbcSIan Lepore * mapped devices are downstream of the L2 cache. Note that this needs 126b07d0cbcSIan Lepore * to be done even for memory mapped as Device type, because while 127b07d0cbcSIan Lepore * Device memory is not cached, writes to it are still buffered. 128b07d0cbcSIan Lepore */ 129b07d0cbcSIan Lepore dsb(); 130b07d0cbcSIan Lepore if (flags & BUS_SPACE_BARRIER_WRITE) { 131b07d0cbcSIan Lepore cpu_l2cache_drain_writebuf(); 132b07d0cbcSIan Lepore } 13315898edaSRafal Jaworowski } 134