364 lines
8.2 KiB
C
364 lines
8.2 KiB
C
/* $NetBSD: i80312_space.c,v 1.2 2001/11/28 21:08:47 thorpej Exp $ */
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/*
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* Copyright (c) 2001 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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/*
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* bus_space functions for i80312 Companion I/O chip.
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <uvm/uvm_extern.h>
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#include <machine/bus.h>
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#include <arm/xscale/i80312reg.h>
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#include <arm/xscale/i80312var.h>
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/* Prototypes for all the bus_space structure functions */
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bs_protos(i80312);
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bs_protos(i80312_io);
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bs_protos(i80312_mem);
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bs_protos(bs_notimpl);
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/*
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* Template bus_space -- copied, and the bits that are NULL are
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* filled in.
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*/
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const struct bus_space i80312_bs_tag_template = {
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/* cookie */
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(void *) 0,
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/* mapping/unmapping */
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NULL,
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NULL,
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i80312_bs_subregion,
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/* allocation/deallocation */
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NULL,
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NULL,
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/* get kernel virtual address */
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i80312_bs_vaddr,
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/* mmap */
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i80312_bs_mmap,
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/* barrier */
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i80312_bs_barrier,
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/* read (single) */
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i80312_bs_r_1,
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i80312_bs_r_2,
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i80312_bs_r_4,
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bs_notimpl_bs_r_8,
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/* read multiple */
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i80312_bs_rm_1,
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i80312_bs_rm_2,
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i80312_bs_rm_4,
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bs_notimpl_bs_rm_8,
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/* read region */
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bs_notimpl_bs_rr_1,
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i80312_bs_rr_2,
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i80312_bs_rr_4,
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bs_notimpl_bs_rr_8,
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/* write (single) */
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i80312_bs_w_1,
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i80312_bs_w_2,
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i80312_bs_w_4,
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bs_notimpl_bs_w_8,
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/* write multiple */
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i80312_bs_wm_1,
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i80312_bs_wm_2,
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i80312_bs_wm_4,
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bs_notimpl_bs_wm_8,
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/* write region */
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bs_notimpl_bs_wr_1,
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i80312_bs_wr_2,
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i80312_bs_wr_4,
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bs_notimpl_bs_wr_8,
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/* set multiple */
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bs_notimpl_bs_sm_1,
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bs_notimpl_bs_sm_2,
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bs_notimpl_bs_sm_4,
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bs_notimpl_bs_sm_8,
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/* set region */
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bs_notimpl_bs_sr_1,
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i80312_bs_sr_2,
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bs_notimpl_bs_sr_4,
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bs_notimpl_bs_sr_8,
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/* copy */
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bs_notimpl_bs_c_1,
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i80312_bs_c_2,
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bs_notimpl_bs_c_4,
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bs_notimpl_bs_c_8,
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};
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void
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i80312_bs_init(bus_space_tag_t bs, void *cookie)
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{
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*bs = i80312_bs_tag_template;
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bs->bs_cookie = cookie;
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}
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void
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i80312_io_bs_init(bus_space_tag_t bs, void *cookie)
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{
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*bs = i80312_bs_tag_template;
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bs->bs_cookie = cookie;
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bs->bs_map = i80312_io_bs_map;
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bs->bs_unmap = i80312_io_bs_unmap;
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bs->bs_alloc = i80312_io_bs_alloc;
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bs->bs_free = i80312_io_bs_free;
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bs->bs_vaddr = i80312_io_bs_vaddr;
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}
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void
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i80312_mem_bs_init(bus_space_tag_t bs, void *cookie)
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{
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*bs = i80312_bs_tag_template;
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bs->bs_cookie = cookie;
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bs->bs_map = i80312_mem_bs_map;
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bs->bs_unmap = i80312_mem_bs_unmap;
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bs->bs_alloc = i80312_mem_bs_alloc;
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bs->bs_free = i80312_mem_bs_free;
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bs->bs_mmap = i80312_mem_bs_mmap;
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}
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/* *** Routines shared by i80312, PCI IO, and PCI MEM. *** */
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int
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i80312_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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i80312_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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void *
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i80312_bs_vaddr(void *t, bus_space_handle_t bsh)
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{
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return ((void *)bsh);
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}
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paddr_t
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i80312_bs_mmap(void *t, bus_addr_t addr, off_t off, int prot, int flags)
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{
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/* Not supported. */
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return (-1);
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}
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/* *** Routines for PCI IO. *** */
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int
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i80312_io_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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struct i80312_softc *sc = t;
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vaddr_t winvaddr;
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uint32_t busbase, bussize;
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if (bpa >= sc->sc_pioout_base &&
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bpa < (sc->sc_pioout_base + sc->sc_pioout_size)) {
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busbase = sc->sc_pioout_base;
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bussize = sc->sc_pioout_size;
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winvaddr = sc->sc_piow_vaddr;
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} else if (bpa >= sc->sc_sioout_base &&
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bpa < (sc->sc_sioout_base + sc->sc_sioout_size)) {
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busbase = sc->sc_sioout_base;
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bussize = sc->sc_sioout_size;
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winvaddr = sc->sc_siow_vaddr;
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} else
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return (EINVAL);
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if ((bpa + size) >= (busbase + bussize))
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return (EINVAL);
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/*
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* Found the window -- PCI I/O space is mapped at a fixed
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* virtual address by board-specific code. Translate the
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* bus address to the virtual address.
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*/
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*bshp = winvaddr + (bpa - busbase);
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return (0);
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}
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void
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i80312_io_bs_unmap(void *t, bus_space_handle_t bsh, bus_size_t size)
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{
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/* Nothing to do. */
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}
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int
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i80312_io_bs_alloc(void *t, bus_addr_t rstart, bus_addr_t rend,
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bus_size_t size, bus_size_t alignment, bus_size_t boundary, int flags,
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bus_addr_t *bpap, bus_space_handle_t *bshp)
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{
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panic("i80312_io_bs_alloc(): not implemented\n");
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}
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void
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i80312_io_bs_free(void *t, bus_space_handle_t bsh, bus_size_t size)
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{
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panic("i80312_io_bs_free(): not implemented\n");
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}
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void *
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i80312_io_bs_vaddr(void *t, bus_space_handle_t bsh)
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{
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/* Not supported. */
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return (NULL);
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}
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/* *** Routines for PCI MEM. *** */
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int
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i80312_mem_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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struct i80312_softc *sc = t;
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vaddr_t va;
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uint32_t busbase, bussize;
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paddr_t pa, endpa, physbase;
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if (bpa >= sc->sc_pmemout_base &&
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bpa < (sc->sc_pmemout_base + sc->sc_pmemout_size)) {
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busbase = sc->sc_pmemout_base;
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bussize = sc->sc_pmemout_size;
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physbase = I80312_PCI_XLATE_PMW_BASE;
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} else if (bpa >= sc->sc_smemout_base &&
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bpa < (sc->sc_smemout_base + sc->sc_smemout_size)) {
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busbase = sc->sc_smemout_base;
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bussize = sc->sc_smemout_size;
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physbase = I80312_PCI_XLATE_SMW_BASE;
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} else
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return (EINVAL);
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if ((bpa + size) >= (busbase + bussize))
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return (EINVAL);
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/*
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* Found the window -- PCI MEM space is not mapped by allocating
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* some kernel VA space and mapping the pages with pmap_enter().
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* pmap_enter() will map unmanaged pages as non-cacheable.
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*/
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pa = trunc_page((bpa - busbase) + physbase);
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endpa = round_page(((bpa - busbase) + physbase) + size);
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va = uvm_km_valloc(kernel_map, endpa - pa);
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if (va == 0)
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return (ENOMEM);
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*bshp = va + (bpa & PAGE_MASK);
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for (; pa < endpa; pa += PAGE_SIZE, va += PAGE_SIZE) {
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pmap_enter(pmap_kernel(), va, pa,
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VM_PROT_READ | VM_PROT_WRITE, PMAP_WIRED);
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}
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pmap_update(pmap_kernel());
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return (0);
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}
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void
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i80312_mem_bs_unmap(void *t, bus_space_handle_t bsh, bus_size_t size)
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{
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vaddr_t va, endva;
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va = trunc_page(bsh);
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endva = round_page(bsh + size);
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/* Free the kernel virtual mapping. */
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uvm_km_free(kernel_map, va, endva - va);
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}
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int
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i80312_mem_bs_alloc(void *t, bus_addr_t rstart, bus_addr_t rend,
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bus_size_t size, bus_size_t alignment, bus_size_t boundary, int flags,
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bus_addr_t *bpap, bus_space_handle_t *bshp)
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{
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panic("i80312_mem_bs_alloc(): not implemented\n");
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}
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void
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i80312_mem_bs_free(void *t, bus_space_handle_t bsh, bus_size_t size)
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{
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panic("i80312_mem_bs_free(): not implemented\n");
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}
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paddr_t
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i80312_mem_bs_mmap(void *t, bus_addr_t addr, off_t off, int prot, int flags)
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{
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/* XXX */
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return (-1);
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}
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