1/*	$NetBSD: ixp425_space.c,v 1.7 2009/10/21 14:15:51 rmind 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 *
17 * THIS SOFTWARE IS PROVIDED BY ICHIRO FUKUHARA ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL ICHIRO FUKUHARA OR THE VOICES IN HIS HEAD BE LIABLE FOR
21 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30#include <sys/cdefs.h>
31__KERNEL_RCSID(0, "$NetBSD: ixp425_space.c,v 1.7 2009/10/21 14:15:51 rmind Exp $");
32
33/*
34 * bus_space I/O functions for ixp425
35 */
36
37#include <sys/param.h>
38#include <sys/systm.h>
39#include <sys/queue.h>
40
41#include <uvm/uvm.h>
42
43#include <sys/bus.h>
44
45#include <arm/xscale/ixp425reg.h>
46#include <arm/xscale/ixp425var.h>
47
48/* Proto types for all the bus_space structure functions */
49bs_protos(ixp425);
50bs_protos(generic);
51bs_protos(generic_armv4);
52bs_protos(bs_notimpl);
53
54struct bus_space ixp425_bs_tag = {
55	/* cookie */
56	(void *) 0,
57
58	/* mapping/unmapping */
59	ixp425_bs_map,
60	ixp425_bs_unmap,
61	ixp425_bs_subregion,
62
63	/* allocation/deallocation */
64	ixp425_bs_alloc,
65	ixp425_bs_free,
66
67	/* get kernel virtual address */
68	ixp425_bs_vaddr,
69
70	/* mmap bus space for userland */
71	ixp425_bs_mmap,
72
73	/* barrier */
74	ixp425_bs_barrier,
75
76	/* read (single) */
77	generic_bs_r_1,
78	generic_armv4_bs_r_2,
79	generic_bs_r_4,
80	bs_notimpl_bs_r_8,
81
82	/* read multiple */
83	generic_bs_rm_1,
84	generic_armv4_bs_rm_2,
85	generic_bs_rm_4,
86	bs_notimpl_bs_rm_8,
87
88	/* read region */
89	generic_bs_rr_1,
90	generic_armv4_bs_rr_2,
91	generic_bs_rr_4,
92	bs_notimpl_bs_rr_8,
93
94	/* write (single) */
95	generic_bs_w_1,
96	generic_armv4_bs_w_2,
97	generic_bs_w_4,
98	bs_notimpl_bs_w_8,
99
100	/* write multiple */
101	generic_bs_wm_1,
102	generic_armv4_bs_wm_2,
103	generic_bs_wm_4,
104	bs_notimpl_bs_wm_8,
105
106	/* write region */
107	generic_bs_wr_1,
108	generic_armv4_bs_wr_2,
109	generic_bs_wr_4,
110	bs_notimpl_bs_wr_8,
111
112	/* set multiple */
113	bs_notimpl_bs_sm_1,
114	bs_notimpl_bs_sm_2,
115	bs_notimpl_bs_sm_4,
116	bs_notimpl_bs_sm_8,
117
118	/* set region */
119	bs_notimpl_bs_sr_1,
120	generic_armv4_bs_sr_2,
121	generic_bs_sr_4,
122	bs_notimpl_bs_sr_8,
123
124	/* copy */
125	bs_notimpl_bs_c_1,
126	generic_armv4_bs_c_2,
127	bs_notimpl_bs_c_4,
128	bs_notimpl_bs_c_8,
129};
130
131int
132ixp425_bs_map(void *t, bus_addr_t bpa, bus_size_t size,
133	      int cacheable, bus_space_handle_t *bshp)
134{
135	const struct pmap_devmap	*pd;
136
137	paddr_t		startpa;
138	paddr_t		endpa;
139	paddr_t		pa;
140	paddr_t		offset;
141	vaddr_t		va;
142
143	if ((pd = pmap_devmap_find_pa(bpa, size)) != NULL) {
144		/* Device was statically mapped. */
145		*bshp = pd->pd_va + (bpa - pd->pd_pa);
146		return 0;
147	}
148
149	endpa = round_page(bpa + size);
150	offset = bpa & PAGE_MASK;
151	startpa = trunc_page(bpa);
152
153	/* Get some VM.  */
154	va = uvm_km_alloc(kernel_map, endpa - startpa, 0,
155	    UVM_KMF_VAONLY | UVM_KMF_NOWAIT);
156	if (va == 0)
157		return ENOMEM;
158
159	/* Store the bus space handle */
160	*bshp = va + offset;
161
162	/* Now map the pages */
163	for (pa = startpa; pa < endpa; pa += PAGE_SIZE, va += PAGE_SIZE) {
164		pmap_enter(pmap_kernel(), va, pa,
165		    VM_PROT_READ | VM_PROT_WRITE,
166		    VM_PROT_READ | VM_PROT_WRITE | PMAP_WIRED);
167	}
168	pmap_update(pmap_kernel());
169
170	return(0);
171}
172
173void
174ixp425_bs_unmap(void *t, bus_space_handle_t bsh, bus_size_t size)
175{
176	vaddr_t	va;
177	vaddr_t	endva;
178
179	if (pmap_devmap_find_va(bsh, size) != NULL) {
180		/* Device was statically mapped; nothing to do. */
181		return;
182	}
183
184	endva = round_page(bsh + size);
185	va = trunc_page(bsh);
186
187	pmap_remove(pmap_kernel(), va, endva);
188	pmap_update(pmap_kernel());
189	uvm_km_free(kernel_map, va, endva - va, UVM_KMF_VAONLY);
190}
191
192int
193ixp425_bs_alloc(void *t, bus_addr_t rstart, bus_addr_t rend,
194	bus_size_t size, bus_size_t alignment, bus_size_t boundary, int cacheable,
195	bus_addr_t *bpap, bus_space_handle_t *bshp)
196{
197	panic("ixp425_bs_alloc(): not implemented\n");
198}
199
200void
201ixp425_bs_free(void *t, bus_space_handle_t bsh, bus_size_t size)
202{
203	panic("ixp425_bs_free(): not implemented\n");
204}
205
206int
207ixp425_bs_subregion(void *t, bus_space_handle_t bsh, bus_size_t offset,
208	bus_size_t size, bus_space_handle_t *nbshp)
209{
210	*nbshp = bsh + offset;
211	return (0);
212}
213
214void *
215ixp425_bs_vaddr(void *t, bus_space_handle_t bsh)
216{
217	return ((void *)bsh);
218}
219
220paddr_t
221ixp425_bs_mmap(void *t, bus_addr_t addr, off_t off, int prot, int flags)
222{
223	/* Not supported. */
224	return (-1);
225}
226
227void
228ixp425_bs_barrier(void *t, bus_space_handle_t bsh, bus_size_t offset,
229    bus_size_t len, int flags)
230{
231/* NULL */
232}
233/* End of ixp425_space.c */
234