obio_space.c revision 1.12 
1/*	$NetBSD: obio_space.c,v 1.12 2005/11/24 13:08:33 yamt 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/cdefs.h>
43__KERNEL_RCSID(0, "$NetBSD: obio_space.c,v 1.12 2005/11/24 13:08:33 yamt Exp $");
44
45#include <sys/param.h>
46#include <sys/systm.h>
47
48#include <uvm/uvm_extern.h>
49
50#include <machine/bus.h>
51
52/* Prototypes for all the bus_space structure functions */
53bs_protos(obio);
54bs_protos(generic);
55bs_protos(bs_notimpl);
56
57/*
58 * The obio bus space tag.  This is constant for all instances, so
59 * we never have to explicitly "create" it.
60 */
61struct bus_space obio_bs_tag = {
62	/* cookie */
63	(void *) 0,
64
65	/* mapping/unmapping */
66	obio_bs_map,
67	obio_bs_unmap,
68	obio_bs_subregion,
69
70	/* allocation/deallocation */
71	obio_bs_alloc,
72	obio_bs_free,
73
74	/* get kernel virtual address */
75	obio_bs_vaddr,
76
77	/* mmap */
78	bs_notimpl_bs_mmap,
79
80	/* barrier */
81	obio_bs_barrier,
82
83	/* read (single) */
84	generic_bs_r_1,
85	bs_notimpl_bs_r_2,
86	generic_bs_r_4,
87	bs_notimpl_bs_r_8,
88
89	/* read multiple */
90	generic_bs_rm_1,
91	bs_notimpl_bs_rm_2,
92	bs_notimpl_bs_rm_4,
93	bs_notimpl_bs_rm_8,
94
95	/* read region */
96	generic_bs_rr_1,
97	bs_notimpl_bs_rr_2,
98	bs_notimpl_bs_rr_4,
99	bs_notimpl_bs_rr_8,
100
101	/* write (single) */
102	generic_bs_w_1,
103	bs_notimpl_bs_w_2,
104	generic_bs_w_4,
105	bs_notimpl_bs_w_8,
106
107	/* write multiple */
108	generic_bs_wm_1,
109	bs_notimpl_bs_wm_2,
110	bs_notimpl_bs_wm_4,
111	bs_notimpl_bs_wm_8,
112
113	/* write region */
114	bs_notimpl_bs_wr_1,
115	bs_notimpl_bs_wr_2,
116	bs_notimpl_bs_wr_4,
117	bs_notimpl_bs_wr_8,
118
119	/* set multiple */
120	bs_notimpl_bs_sm_1,
121	bs_notimpl_bs_sm_2,
122	bs_notimpl_bs_sm_4,
123	bs_notimpl_bs_sm_8,
124
125	/* set region */
126	bs_notimpl_bs_sr_1,
127	bs_notimpl_bs_sr_2,
128	bs_notimpl_bs_sr_4,
129	bs_notimpl_bs_sr_8,
130
131	/* copy */
132	bs_notimpl_bs_c_1,
133	bs_notimpl_bs_c_2,
134	bs_notimpl_bs_c_4,
135	bs_notimpl_bs_c_8,
136};
137
138int
139obio_bs_map(void *t, bus_addr_t bpa, bus_size_t size, int flags,
140    bus_space_handle_t *bshp)
141{
142	const struct pmap_devmap *pd;
143	paddr_t startpa, endpa, pa, offset;
144	vaddr_t va;
145	pt_entry_t *pte;
146
147	if ((pd = pmap_devmap_find_pa(bpa, size)) != NULL) {
148		/* Device was statically mapped. */
149		*bshp = pd->pd_va + (bpa - pd->pd_pa);
150		return (0);
151	}
152
153	endpa = round_page(bpa + size);
154	offset = bpa & PAGE_MASK;
155	startpa = trunc_page(bpa);
156
157	va = uvm_km_alloc(kernel_map, endpa - startpa, 0,
158	    UVM_KMF_VAONLY | UVM_KMF_NOWAIT);
159	if (va == 0)
160		return(ENOMEM);
161
162	*bshp = va + offset;
163
164	for (pa = startpa; pa < endpa; pa += PAGE_SIZE, va += PAGE_SIZE) {
165		pmap_kenter_pa(va, pa, VM_PROT_READ | VM_PROT_WRITE);
166		pte = vtopte(va);
167		*pte &= ~L2_S_CACHE_MASK;
168		PTE_SYNC(pte);
169	}
170	pmap_update(pmap_kernel());
171
172	return (0);
173}
174
175int
176obio_bs_alloc(void *t, bus_addr_t rstart, bus_addr_t rend, bus_size_t size,
177    bus_size_t alignment, bus_size_t boundary, int flags, bus_addr_t *bpap,
178    bus_space_handle_t *bshp)
179{
180
181	panic("obio_bs_alloc(): not implemented");
182}
183
184
185void
186obio_bs_unmap(void *t, bus_space_handle_t bsh, bus_size_t size)
187{
188	vaddr_t va, endva;
189
190	if (pmap_devmap_find_va(bsh, size) != NULL) {
191		/* Device was statically mapped; nothing to do. */
192		return;
193	}
194
195	endva = round_page(bsh + size);
196	va = trunc_page(bsh);
197
198	pmap_kremove(va, endva - va);
199	uvm_km_free(kernel_map, va, endva - va, UVM_KMF_VAONLY);
200}
201
202void
203obio_bs_free(void *t, bus_space_handle_t bsh, bus_size_t size)
204{
205
206	panic("obio_bs_free(): not implemented");
207}
208
209int
210obio_bs_subregion(void *t, bus_space_handle_t bsh, bus_size_t offset,
211    bus_size_t size, bus_space_handle_t *nbshp)
212{
213
214	*nbshp = bsh + offset;
215	return (0);
216}
217
218void *
219obio_bs_vaddr(void *t, bus_space_handle_t bsh)
220{
221
222	return ((void *)bsh);
223}
224
225void
226obio_bs_barrier(void *t, bus_space_handle_t bsh, bus_size_t offset,
227    bus_size_t len, int flags)
228{
229
230	/* Nothing to do. */
231}
232