1/* $NetBSD: ixp425_space.c,v 1.6 2006/04/10 03:36:03 simonb Exp $ */ 2 3/* 4 * Copyright (c) 2003 5 * Ichiro FUKUHARA <ichiro@ichiro.org>. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by Ichiro FUKUHARA. 19 * 4. The name of the company nor the name of the author may be used to 20 * endorse or promote products derived from this software without specific 21 * prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY ICHIRO FUKUHARA ``AS IS'' AND ANY EXPRESS OR 24 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 25 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 26 * IN NO EVENT SHALL ICHIRO FUKUHARA OR THE VOICES IN HIS HEAD BE LIABLE FOR 27 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36#include <sys/cdefs.h>
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37__FBSDID("$FreeBSD: head/sys/arm/xscale/ixp425/ixp425_space.c 164426 2006-11-19 23:55:23Z sam $");
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37__FBSDID("$FreeBSD: head/sys/arm/xscale/ixp425/ixp425_space.c 177887 2008-04-03 18:22:08Z raj $"); |
38 39/* 40 * bus_space I/O functions for ixp425 41 */ 42 43#include <sys/param.h> 44#include <sys/systm.h> 45#include <sys/bus.h> 46 47#include <machine/pcb.h> 48 49#include <vm/vm.h> 50#include <vm/vm_kern.h> 51#include <vm/pmap.h> 52#include <vm/vm_page.h> 53#include <vm/vm_extern.h> 54 55#include <machine/bus.h> 56 57#include <arm/xscale/ixp425/ixp425reg.h> 58#include <arm/xscale/ixp425/ixp425var.h> 59 60/* Proto types for all the bus_space structure functions */
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61bs_protos(ixp425);
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61bs_protos(generic); 62bs_protos(generic_armv4); 63 64struct bus_space ixp425_bs_tag = { 65 /* cookie */ 66 .bs_cookie = (void *) 0, 67 68 /* mapping/unmapping */
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70 .bs_map = ixp425_bs_map,
71 .bs_unmap = ixp425_bs_unmap,
72 .bs_subregion = ixp425_bs_subregion,
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69 .bs_map = generic_bs_map, 70 .bs_unmap = generic_bs_unmap, 71 .bs_subregion = generic_bs_subregion, |
72 73 /* allocation/deallocation */
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75 .bs_alloc = ixp425_bs_alloc,
76 .bs_free = ixp425_bs_free,
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74 .bs_alloc = generic_bs_alloc, 75 .bs_free = generic_bs_free, |
76 77 /* barrier */
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79 .bs_barrier = ixp425_bs_barrier,
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78 .bs_barrier = generic_bs_barrier, |
79 80 /* read (single) */ 81 .bs_r_1 = generic_bs_r_1, 82 .bs_r_2 = generic_armv4_bs_r_2, 83 .bs_r_4 = generic_bs_r_4, 84 .bs_r_8 = NULL, 85 86 /* read multiple */ 87 .bs_rm_1 = generic_bs_rm_1, 88 .bs_rm_2 = generic_armv4_bs_rm_2, 89 .bs_rm_4 = generic_bs_rm_4, 90 .bs_rm_8 = NULL, 91 92 /* read region */ 93 .bs_rr_1 = generic_bs_rr_1, 94 .bs_rr_2 = generic_armv4_bs_rr_2, 95 .bs_rr_4 = generic_bs_rr_4, 96 .bs_rr_8 = NULL, 97 98 /* write (single) */ 99 .bs_w_1 = generic_bs_w_1, 100 .bs_w_2 = generic_armv4_bs_w_2, 101 .bs_w_4 = generic_bs_w_4, 102 .bs_w_8 = NULL, 103 104 /* write multiple */ 105 .bs_wm_1 = generic_bs_wm_1, 106 .bs_wm_2 = generic_armv4_bs_wm_2, 107 .bs_wm_4 = generic_bs_wm_4, 108 .bs_wm_8 = NULL, 109 110 /* write region */ 111 .bs_wr_1 = generic_bs_wr_1, 112 .bs_wr_2 = generic_armv4_bs_wr_2, 113 .bs_wr_4 = generic_bs_wr_4, 114 .bs_wr_8 = NULL, 115 116 /* set multiple */ 117 /* XXX not implemented */ 118 119 /* set region */ 120 .bs_sr_1 = NULL, 121 .bs_sr_2 = generic_armv4_bs_sr_2, 122 .bs_sr_4 = generic_bs_sr_4, 123 .bs_sr_8 = NULL, 124 125 /* copy */ 126 .bs_c_1 = NULL, 127 .bs_c_2 = generic_armv4_bs_c_2, 128 .bs_c_4 = NULL, 129 .bs_c_8 = NULL, 130};
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132
133int
134ixp425_bs_map(void *t, bus_addr_t bpa, bus_size_t size,
135 int cacheable, bus_space_handle_t *bshp)
136{
137 const struct pmap_devmap *pd;
138 vm_paddr_t startpa, endpa, pa, offset;
139 vm_offset_t va;
140 pt_entry_t *pte;
141
142 if ((pd = pmap_devmap_find_pa(bpa, size)) != NULL) {
143 /* Device was statically mapped. */
144 *bshp = pd->pd_va + (bpa - pd->pd_pa);
145 return (0);
146 }
147
148 endpa = round_page(bpa + size);
149 offset = bpa & PAGE_MASK;
150 startpa = trunc_page(bpa);
151
152 va = kmem_alloc(kernel_map, endpa - startpa);
153 if (va == 0)
154 return (ENOMEM);
155
156 *bshp = va + offset;
157
158 for (pa = startpa; pa < endpa; pa += PAGE_SIZE, va += PAGE_SIZE) {
159 pmap_kenter(va, pa);
160 pte = vtopte(va);
161 *pte &= ~L2_S_CACHE_MASK;
162 PTE_SYNC(pte);
163 }
164
165 return (0);
166}
167
168void
169ixp425_bs_unmap(void *t, bus_space_handle_t h, bus_size_t size)
170{
171 vm_offset_t va, endva;
172
173 if (pmap_devmap_find_va((vm_offset_t)t, size) != NULL) {
174 /* Device was statically mapped; nothing to do. */
175 return;
176 }
177
178 endva = round_page((vm_offset_t)t + size);
179 va = trunc_page((vm_offset_t)t);
180
181 while (va < endva) {
182 pmap_kremove(va);
183 va += PAGE_SIZE;
184 }
185 kmem_free(kernel_map, va, endva - va);
186}
187
188int
189ixp425_bs_alloc(void *t, bus_addr_t rstart, bus_addr_t rend,
190 bus_size_t size, bus_size_t alignment, bus_size_t boundary, int cacheable,
191 bus_addr_t *bpap, bus_space_handle_t *bshp)
192{
193 panic("ixp425_bs_alloc(): not implemented");
194}
195
196void
197ixp425_bs_free(void *t, bus_space_handle_t bsh, bus_size_t size)
198{
199 panic("ixp425_bs_free(): not implemented");
200}
201
202int
203ixp425_bs_subregion(void *t, bus_space_handle_t bsh, bus_size_t offset,
204 bus_size_t size, bus_space_handle_t *nbshp)
205{
206 *nbshp = bsh + offset;
207 return (0);
208}
209
210void
211ixp425_bs_barrier(void *t, bus_space_handle_t bsh, bus_size_t offset,
212 bus_size_t len, int flags)
213{
214 /* Nothing to do. */
215}
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