314 lines
7.0 KiB
C
314 lines
7.0 KiB
C
/* $NetBSD: footbridge_io.c,v 1.8 2000/06/29 08:53:00 mrg Exp $ */
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/*
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* Copyright (c) 1997 Causality Limited
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* Copyright (c) 1997 Mark Brinicombe.
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* All rights reserved.
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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 by Mark Brinicombe
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* for the NetBSD Project.
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* 4. The name of the company nor the name of the author may be used to
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* endorse or promote products derived from this software without specific
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* prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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* bus_space I/O functions for footbridge
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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 <machine/bus.h>
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#include <arm32/footbridge/dc21285mem.h>
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#include <uvm/uvm_extern.h>
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/* Proto types for all the bus_space structure functions */
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bs_protos(footbridge);
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bs_protos(bs_notimpl);
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bs_map_proto(footbridge_mem);
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bs_unmap_proto(footbridge_mem);
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/* Declare the footbridge bus space tag */
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struct bus_space footbridge_bs_tag = {
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/* cookie */
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(void *) 0, /* Base address */
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/* mapping/unmapping */
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footbridge_bs_map,
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footbridge_bs_unmap,
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footbridge_bs_subregion,
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/* allocation/deallocation */
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footbridge_bs_alloc,
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footbridge_bs_free,
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/* get kernel virtual address */
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footbridge_bs_vaddr,
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/* barrier */
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footbridge_bs_barrier,
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/* read (single) */
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footbridge_bs_r_1,
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footbridge_bs_r_2,
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footbridge_bs_r_4,
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bs_notimpl_bs_r_8,
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/* read multiple */
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footbridge_bs_rm_1,
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footbridge_bs_rm_2,
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footbridge_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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footbridge_bs_rr_2,
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footbridge_bs_rr_4,
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bs_notimpl_bs_rr_8,
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/* write (single) */
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footbridge_bs_w_1,
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footbridge_bs_w_2,
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footbridge_bs_w_4,
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bs_notimpl_bs_w_8,
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/* write multiple */
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footbridge_bs_wm_1,
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footbridge_bs_wm_2,
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footbridge_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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footbridge_bs_wr_2,
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footbridge_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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footbridge_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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footbridge_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 footbridge_create_io_bs_tag(t, cookie)
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struct bus_space *t;
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void *cookie;
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{
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*t = footbridge_bs_tag;
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t->bs_cookie = cookie;
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}
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void footbridge_create_mem_bs_tag(t, cookie)
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struct bus_space *t;
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void *cookie;
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{
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*t = footbridge_bs_tag;
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t->bs_map = footbridge_mem_bs_map;
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t->bs_unmap = footbridge_mem_bs_unmap;
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t->bs_cookie = cookie;
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}
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/* bus space functions */
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int
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footbridge_bs_map(t, bpa, size, cacheable, bshp)
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void *t;
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bus_addr_t bpa;
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bus_size_t size;
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int cacheable;
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bus_space_handle_t *bshp;
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{
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/*
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* The whole 64K of PCI space is always completely mapped during
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* boot.
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*
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* Eventually this function will do the mapping check overlapping /
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* multiple mappings.
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*/
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/* The cookie is the base address for the I/O area */
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*bshp = bpa + (bus_addr_t)t;
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return(0);
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}
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int
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footbridge_mem_bs_map(t, bpa, size, cacheable, bshp)
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void *t;
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bus_addr_t bpa;
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bus_size_t size;
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int cacheable;
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bus_space_handle_t *bshp;
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{
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bus_addr_t startpa, endpa;
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vaddr_t va;
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/* Round the allocation to page boundries */
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startpa = trunc_page(bpa);
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endpa = round_page(bpa + size);
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/*
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* Check for mappings below 1MB as we have this space already
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* mapped. In practice it is only the VGA hole that takes
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* advantage of this.
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*/
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if (endpa < DC21285_PCI_ISA_MEM_VSIZE) {
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/* Store the bus space handle */
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*bshp = DC21285_PCI_ISA_MEM_VBASE + bpa;
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return 0;
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}
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/*
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* Eventually this function will do the mapping check for overlapping /
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* multiple mappings
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*/
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va = uvm_km_valloc(kernel_map, endpa - startpa);
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if (va == 0)
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return ENOMEM;
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/* Store the bus space handle */
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*bshp = va + (bpa & PGOFSET);
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/* Now map the pages */
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/* The cookie is the physical base address for the I/O area */
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while (startpa < endpa) {
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pmap_enter(kernel_pmap, va, (bus_addr_t)t + startpa,
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VM_PROT_READ | VM_PROT_WRITE, 0);
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va += NBPG;
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startpa += NBPG;
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}
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/* if (bpa >= DC21285_PCI_MEM_VSIZE && bpa != DC21285_ARMCSR_VBASE)
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panic("footbridge_bs_map: Address out of range (%08lx)\n", bpa);
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*/
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return(0);
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}
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int
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footbridge_bs_alloc(t, rstart, rend, size, alignment, boundary, cacheable,
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bpap, bshp)
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void *t;
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bus_addr_t rstart, rend;
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bus_size_t size, alignment, boundary;
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int cacheable;
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bus_addr_t *bpap;
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bus_space_handle_t *bshp;
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{
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panic("footbridge_alloc(): Help!\n");
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}
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void
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footbridge_bs_unmap(t, bsh, size)
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void *t;
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bus_space_handle_t bsh;
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bus_size_t size;
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{
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/*
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* Temporary implementation
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*/
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}
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void
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footbridge_mem_bs_unmap(t, bsh, size)
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void *t;
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bus_space_handle_t bsh;
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bus_size_t size;
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{
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vaddr_t startva, endva;
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/*
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* Check for mappings below 1MB as we have this space permenantly
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* mapped. In practice it is only the VGA hole that takes
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* advantage of this.
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*/
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if (bsh >= DC21285_PCI_ISA_MEM_VBASE
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&& bsh < (DC21285_PCI_ISA_MEM_VBASE + DC21285_PCI_ISA_MEM_VSIZE)) {
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return;
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}
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startva = trunc_page(bsh);
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endva = round_page(bsh + size);
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uvm_km_free(kernel_map, startva, endva - startva);
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}
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void
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footbridge_bs_free(t, bsh, size)
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void *t;
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bus_space_handle_t bsh;
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bus_size_t size;
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{
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panic("footbridge_free(): Help!\n");
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/* footbridge_bs_unmap() does all that we need to do. */
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/* footbridge_bs_unmap(t, bsh, size);*/
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}
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int
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footbridge_bs_subregion(t, bsh, offset, size, nbshp)
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void *t;
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bus_space_handle_t bsh;
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bus_size_t offset, size;
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bus_space_handle_t *nbshp;
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{
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*nbshp = bsh + (offset << ((int)t));
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return (0);
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}
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void *
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footbridge_bs_vaddr(t, bsh)
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void *t;
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bus_space_handle_t bsh;
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{
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return ((void *)bsh);
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}
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void
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footbridge_bs_barrier(t, bsh, offset, len, flags)
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void *t;
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bus_space_handle_t bsh;
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bus_size_t offset, len;
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int flags;
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{
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}
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