1 /* $NetBSD: obio_space.c,v 1.6 2003/07/15 00:25:05 lukem 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 #include <sys/cdefs.h>
39 __FBSDID("$FreeBSD: src/sys/arm/arm/bus_space_generic.c,v 1.1 2008/04/03 18:28:34 raj Exp $");
40
41 #include <sys/param.h>
42 #include <sys/systm.h>
43 #include <sys/bus.h>
44 #include <sys/kernel.h>
45 #include <sys/malloc.h>
46
47 #include <vm/vm.h>
48 #include <vm/pmap.h>
49 #include <vm/vm_kern.h>
50 #include <vm/vm_extern.h>
51
52 #include <machine/bus.h>
53
54 /* Prototypes for all the bus_space structure functions */
55 bs_protos(generic);
56
57 int
58 generic_bs_map(void *t, bus_addr_t bpa, bus_size_t size, int flags,
59 bus_space_handle_t *bshp)
60 {
61 const struct pmap_devmap *pd;
62 vm_paddr_t startpa, endpa, pa, offset;
63 vm_offset_t va;
64 pt_entry_t *pte;
65
66 if ((pd = pmap_devmap_find_pa(bpa, size)) != NULL) {
67 /* Device was statically mapped. */
68 *bshp = pd->pd_va + (bpa - pd->pd_pa);
69 return (0);
70 }
71
72 endpa = round_page(bpa + size);
73 offset = bpa & PAGE_MASK;
74 startpa = trunc_page(bpa);
75
76 va = kmem_alloc(kernel_map, endpa - startpa);
77 if (va == 0)
78 return (ENOMEM);
79
80 *bshp = va + offset;
81
82 for (pa = startpa; pa < endpa; pa += PAGE_SIZE, va += PAGE_SIZE) {
83 pmap_kenter(va, pa);
84 pte = vtopte(va);
85 if (!(flags & BUS_SPACE_MAP_CACHEABLE)) {
86 *pte &= ~L2_S_CACHE_MASK;
87 PTE_SYNC(pte);
88 }
89 }
90
91 return (0);
92 }
93
94 int
95 generic_bs_alloc(void *t, bus_addr_t rstart, bus_addr_t rend, bus_size_t size,
96 bus_size_t alignment, bus_size_t boundary, int flags, bus_addr_t *bpap,
97 bus_space_handle_t *bshp)
98 {
99
100 panic("generic_bs_alloc(): not implemented");
101 }
102
103
104 void
105 generic_bs_unmap(void *t, bus_space_handle_t h, bus_size_t size)
106 {
107 vm_offset_t va, endva;
108
109 if (pmap_devmap_find_va((vm_offset_t)t, size) != NULL) {
110 /* Device was statically mapped; nothing to do. */
111 return;
112 }
113
114 endva = round_page((vm_offset_t)t + size);
115 va = trunc_page((vm_offset_t)t);
116
117 while (va < endva) {
118 pmap_kremove(va);
119 va += PAGE_SIZE;
120 }
121 kmem_free(kernel_map, va, endva - va);
122 }
123
124 void
125 generic_bs_free(void *t, bus_space_handle_t bsh, bus_size_t size)
126 {
127
128 panic("generic_bs_free(): not implemented");
129 }
130
131 int
132 generic_bs_subregion(void *t, bus_space_handle_t bsh, bus_size_t offset,
133 bus_size_t size, bus_space_handle_t *nbshp)
134 {
135
136 *nbshp = bsh + offset;
137 return (0);
138 }
139
140 void
141 generic_bs_barrier(void *t, bus_space_handle_t bsh, bus_size_t offset,
142 bus_size_t len, int flags)
143 {
144
145 /* Nothing to do. */
146 }
147 Cache object: 9715fa91903f1a139ab8a9c80bb98eef
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