64750d8ea3
out common code related to mapping device memory into a new devmap.c file. Remove the growing duplication of code that used pmap_devmap_find_pa() and then did some math with the returned results to generate a virtual address, and likewise in reverse to get a physical address. Now there are a pair of functions, arm_devmap_vtop() and arm_devmap_ptov(), to do that. The bus_space_map() implementations are rewritten in terms of these.
124 lines
3.7 KiB
C
124 lines
3.7 KiB
C
/* $NetBSD: obio_space.c,v 1.6 2003/07/15 00:25:05 lukem Exp $ */
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/*-
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* Copyright (c) 2001, 2002, 2003 Wasabi Systems, Inc.
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* All rights reserved.
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*
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* Written by Jason R. Thorpe for Wasabi Systems, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed for the NetBSD Project by
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* Wasabi Systems, Inc.
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* 4. The name of Wasabi Systems, Inc. may not be used to endorse
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* or promote products derived from this software without specific prior
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* written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/bus.h>
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#include <sys/kernel.h>
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#include <sys/malloc.h>
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#include <vm/vm.h>
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#include <vm/pmap.h>
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#include <vm/vm_kern.h>
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#include <vm/vm_extern.h>
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#include <machine/bus.h>
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#include <machine/devmap.h>
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/* Prototypes for all the bus_space structure functions */
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bs_protos(generic);
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int
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generic_bs_map(void *t, bus_addr_t bpa, bus_size_t size, int flags,
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bus_space_handle_t *bshp)
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{
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void *va;
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/*
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* Look up the address in the static device mappings. If it's not
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* there, establish a new dynamic mapping.
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*
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* We don't even examine the passed-in flags. For ARM, the CACHEABLE
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* flag doesn't make sense (we create PTE_DEVICE mappings), and the
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* LINEAR flag is just implied because we use kva_alloc(size).
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*/
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if ((va = arm_devmap_ptov(bpa, size)) == NULL)
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if ((va = pmap_mapdev(bpa, size)) == NULL)
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return (ENOMEM);
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*bshp = (bus_space_handle_t)va;
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return (0);
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}
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int
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generic_bs_alloc(void *t, bus_addr_t rstart, bus_addr_t rend, bus_size_t size,
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bus_size_t alignment, bus_size_t boundary, int flags, bus_addr_t *bpap,
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bus_space_handle_t *bshp)
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{
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panic("generic_bs_alloc(): not implemented");
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}
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void
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generic_bs_unmap(void *t, bus_space_handle_t h, bus_size_t size)
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{
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/*
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* If the region is static-mapped do nothing, otherwise remove the
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* dynamic mapping.
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*/
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if (arm_devmap_vtop((void*)h, size) == DEVMAP_PADDR_NOTFOUND)
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pmap_unmapdev((vm_offset_t)h, size);
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}
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void
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generic_bs_free(void *t, bus_space_handle_t bsh, bus_size_t size)
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{
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panic("generic_bs_free(): not implemented");
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}
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int
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generic_bs_subregion(void *t, bus_space_handle_t bsh, bus_size_t offset,
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bus_size_t size, bus_space_handle_t *nbshp)
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{
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*nbshp = bsh + offset;
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return (0);
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}
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void
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generic_bs_barrier(void *t, bus_space_handle_t bsh, bus_size_t offset,
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bus_size_t len, int flags)
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{
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/* Nothing to do. */
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}
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