obio_space.c revision 1.9 
1/*	$NetBSD: obio_space.c,v 1.9 2003/06/15 18:43:50 thorpej Exp $	*/
2
3/*
4 * Copyright (c) 2001, 2002, 2003 Wasabi Systems, Inc.
5 * All rights reserved.
6 *
7 * Written by Jason R. Thorpe for Wasabi Systems, Inc.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 *    notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 *    notice, this list of conditions and the following disclaimer in the
16 *    documentation and/or other materials provided with the distribution.
17 * 3. All advertising materials mentioning features or use of this software
18 *    must display the following acknowledgement:
19 *	This product includes software developed for the NetBSD Project by
20 *	Wasabi Systems, Inc.
21 * 4. The name of Wasabi Systems, Inc. may not be used to endorse
22 *    or promote products derived from this software without specific prior
23 *    written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
28 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL WASABI SYSTEMS, INC
29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
35 * POSSIBILITY OF SUCH DAMAGE.
36 */
37
38/*
39 * bus_space functions for IQ80310 on-board devices
40 */
41
42#include <sys/param.h>
43#include <sys/systm.h>
44
45#include <uvm/uvm_extern.h>
46
47#include <machine/bus.h>
48
49/* Prototypes for all the bus_space structure functions */
50bs_protos(obio);
51bs_protos(generic);
52bs_protos(bs_notimpl);
53
54/*
55 * The obio bus space tag.  This is constant for all instances, so
56 * we never have to explicitly "create" it.
57 */
58struct bus_space obio_bs_tag = {
59	/* cookie */
60	(void *) 0,
61
62	/* mapping/unmapping */
63	obio_bs_map,
64	obio_bs_unmap,
65	obio_bs_subregion,
66
67	/* allocation/deallocation */
68	obio_bs_alloc,
69	obio_bs_free,
70
71	/* get kernel virtual address */
72	obio_bs_vaddr,
73
74	/* mmap */
75	bs_notimpl_bs_mmap,
76
77	/* barrier */
78	obio_bs_barrier,
79
80	/* read (single) */
81	generic_bs_r_1,
82	bs_notimpl_bs_r_2,
83	generic_bs_r_4,
84	bs_notimpl_bs_r_8,
85
86	/* read multiple */
87	generic_bs_rm_1,
88	bs_notimpl_bs_rm_2,
89	bs_notimpl_bs_rm_4,
90	bs_notimpl_bs_rm_8,
91
92	/* read region */
93	generic_bs_rr_1,
94	bs_notimpl_bs_rr_2,
95	bs_notimpl_bs_rr_4,
96	bs_notimpl_bs_rr_8,
97
98	/* write (single) */
99	generic_bs_w_1,
100	bs_notimpl_bs_w_2,
101	generic_bs_w_4,
102	bs_notimpl_bs_w_8,
103
104	/* write multiple */
105	generic_bs_wm_1,
106	bs_notimpl_bs_wm_2,
107	bs_notimpl_bs_wm_4,
108	bs_notimpl_bs_wm_8,
109
110	/* write region */
111	bs_notimpl_bs_wr_1,
112	bs_notimpl_bs_wr_2,
113	bs_notimpl_bs_wr_4,
114	bs_notimpl_bs_wr_8,
115
116	/* set multiple */
117	bs_notimpl_bs_sm_1,
118	bs_notimpl_bs_sm_2,
119	bs_notimpl_bs_sm_4,
120	bs_notimpl_bs_sm_8,
121
122	/* set region */
123	bs_notimpl_bs_sr_1,
124	bs_notimpl_bs_sr_2,
125	bs_notimpl_bs_sr_4,
126	bs_notimpl_bs_sr_8,
127
128	/* copy */
129	bs_notimpl_bs_c_1,
130	bs_notimpl_bs_c_2,
131	bs_notimpl_bs_c_4,
132	bs_notimpl_bs_c_8,
133};
134
135int
136obio_bs_map(void *t, bus_addr_t bpa, bus_size_t size, int flags,
137    bus_space_handle_t *bshp)
138{
139	const struct pmap_devmap *pd;
140	paddr_t startpa, endpa, pa, offset;
141	vaddr_t va;
142	pt_entry_t *pte;
143
144	if ((pd = pmap_devmap_find_pa(bpa, size)) != NULL) {
145		/* Device was statically mapped. */
146		*bshp = pd->pd_va + (bpa - pd->pd_pa);
147		return (0);
148	}
149
150	endpa = round_page(bpa + size);
151	offset = bpa & PAGE_MASK;
152	startpa = trunc_page(bpa);
153
154	va = uvm_km_valloc(kernel_map, endpa - startpa);
155	if (va == 0)
156		return(ENOMEM);
157
158	*bshp = va + offset;
159
160	for (pa = startpa; pa < endpa; pa += PAGE_SIZE, va += PAGE_SIZE) {
161		pmap_kenter_pa(va, pa, VM_PROT_READ | VM_PROT_WRITE);
162		pte = vtopte(va);
163		*pte &= ~L2_S_CACHE_MASK;
164		PTE_SYNC(pte);
165	}
166	pmap_update(pmap_kernel());
167
168	return (0);
169}
170
171int
172obio_bs_alloc(void *t, bus_addr_t rstart, bus_addr_t rend, bus_size_t size,
173    bus_size_t alignment, bus_size_t boundary, int flags, bus_addr_t *bpap,
174    bus_space_handle_t *bshp)
175{
176
177	panic("obio_bs_alloc(): not implemented");
178}
179
180
181void
182obio_bs_unmap(void *t, bus_space_handle_t bsh, bus_size_t size)
183{
184	vaddr_t va, endva;
185
186	if (pmap_devmap_find_va(bsh, size) != NULL) {
187		/* Device was statically mapped; nothing to do. */
188		return;
189	}
190
191	endva = round_page(bsh + size);
192	va = trunc_page(bsh);
193
194	pmap_kremove(va, endva - va);
195	uvm_km_free(kernel_map, va, endva - va);
196}
197
198void
199obio_bs_free(void *t, bus_space_handle_t bsh, bus_size_t size)
200{
201
202	panic("obio_bs_free(): not implemented");
203}
204
205int
206obio_bs_subregion(void *t, bus_space_handle_t bsh, bus_size_t offset,
207    bus_size_t size, bus_space_handle_t *nbshp)
208{
209
210	*nbshp = bsh + offset;
211	return (0);
212}
213
214void *
215obio_bs_vaddr(void *t, bus_space_handle_t bsh)
216{
217
218	return ((void *)bsh);
219}
220
221void
222obio_bs_barrier(void *t, bus_space_handle_t bsh, bus_size_t offset,
223    bus_size_t len, int flags)
224{
225
226	/* Nothing to do. */
227}
228