Annotation of sys/arch/armish/dev/obio_space.c, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: obio_space.c,v 1.2 2006/05/29 17:30:26 drahn Exp $ */
2: /* $NetBSD: obio_space.c,v 1.9 2005/11/24 13:08:33 yamt Exp $ */
3:
4:
5: /*
6: * Copyright (c) 2001, 2002, 2003 Wasabi Systems, Inc.
7: * All rights reserved.
8: *
9: * Written by Jason R. Thorpe for Wasabi Systems, Inc.
10: *
11: * Redistribution and use in source and binary forms, with or without
12: * modification, are permitted provided that the following conditions
13: * are met:
14: * 1. Redistributions of source code must retain the above copyright
15: * notice, this list of conditions and the following disclaimer.
16: * 2. Redistributions in binary form must reproduce the above copyright
17: * notice, this list of conditions and the following disclaimer in the
18: * documentation and/or other materials provided with the distribution.
19: * 3. All advertising materials mentioning features or use of this software
20: * must display the following acknowledgement:
21: * This product includes software developed for the NetBSD Project by
22: * Wasabi Systems, Inc.
23: * 4. The name of Wasabi Systems, Inc. may not be used to endorse
24: * or promote products derived from this software without specific prior
25: * written permission.
26: *
27: * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
28: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
29: * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
30: * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
31: * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
32: * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
33: * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
34: * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
35: * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
36: * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
37: * POSSIBILITY OF SUCH DAMAGE.
38: */
39:
40: /*
41: * bus_space functions for IQ80321 on-board devices
42: */
43:
44: #include <sys/param.h>
45: #include <sys/systm.h>
46:
47: #include <uvm/uvm_extern.h>
48:
49: #include <machine/bus.h>
50:
51: /* Prototypes for all the bus_space structure functions */
52: bs_protos(obio);
53: bs_protos(generic);
54: bs_protos(generic_armv4);
55: bs_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: */
61: struct 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: generic_armv4_bs_r_2,
86: generic_bs_r_4,
87: bs_notimpl_bs_r_8,
88:
89: /* read multiple */
90: generic_bs_rm_1,
91: generic_armv4_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: generic_armv4_bs_w_2,
104: generic_bs_w_4,
105: bs_notimpl_bs_w_8,
106:
107: /* write multiple */
108: generic_bs_wm_1,
109: generic_armv4_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:
138: int
139: obio_bs_map(void *t, bus_addr_t bpa, bus_size_t size, int flag,
140: bus_space_handle_t *bshp)
141: {
142: const struct pmap_devmap *pd;
143: paddr_t startpa, endpa, pa;
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: startpa = trunc_page(bpa);
155:
156: va = uvm_km_valloc(kernel_map, endpa - startpa);
157: if (va == 0)
158: return(ENOMEM);
159:
160: *bshp = (bus_space_handle_t)(va + (bpa - startpa));
161:
162: for (pa = startpa; pa < endpa; pa += PAGE_SIZE, va += PAGE_SIZE) {
163: pmap_kenter_pa(va, pa, VM_PROT_READ | VM_PROT_WRITE);
164: if ((flag & BUS_SPACE_MAP_CACHEABLE) == 0) {
165: pte = vtopte(va);
166: *pte &= ~L2_S_CACHE_MASK;
167: PTE_SYNC(pte);
168: }
169: }
170: pmap_update(pmap_kernel());
171:
172: return (0);
173: }
174:
175: int
176: obio_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:
185: void
186: obio_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);
200: }
201:
202: void
203: obio_bs_free(void *t, bus_space_handle_t bsh, bus_size_t size)
204: {
205:
206: panic("obio_bs_free(): not implemented");
207: }
208:
209: int
210: obio_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:
218: void *
219: obio_bs_vaddr(void *t, bus_space_handle_t bsh)
220: {
221:
222: return ((void *)bsh);
223: }
224:
225: void
226: obio_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: }
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