Annotation of sys/arch/arm/sa11x0/sa11x1_space.c, Revision 1.1.1.1
1.1 nbrk 1: /* $Id$ */
2: /*
3: * Copyright (c) 2001, 2002 Wasabi Systems, Inc.
4: * All rights reserved.
5: *
6: * Written by Jason R. Thorpe for Wasabi Systems, Inc.
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: * 3. All advertising materials mentioning features or use of this software
17: * must display the following acknowledgement:
18: * This product includes software developed for the NetBSD Project by
19: * Wasabi Systems, Inc.
20: * 4. The name of Wasabi Systems, Inc. may not be used to endorse
21: * or promote products derived from this software without specific prior
22: * written permission.
23: *
24: * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
25: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
26: * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
27: * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
28: * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
29: * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
30: * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
31: * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
32: * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
33: * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
34: * POSSIBILITY OF SUCH DAMAGE.
35: */
36: /*
37: * Copyright (c) 1997 Mark Brinicombe.
38: * Copyright (c) 1997 Causality Limited.
39: * All rights reserved.
40: *
41: * This code is derived from software contributed to The NetBSD Foundation
42: * by Ichiro FUKUHARA.
43: *
44: * Redistribution and use in source and binary forms, with or without
45: * modification, are permitted provided that the following conditions
46: * are met:
47: * 1. Redistributions of source code must retain the above copyright
48: * notice, this list of conditions and the following disclaimer.
49: * 2. Redistributions in binary form must reproduce the above copyright
50: * notice, this list of conditions and the following disclaimer in the
51: * documentation and/or other materials provided with the distribution.
52: * 3. All advertising materials mentioning features or use of this software
53: * must display the following acknowledgement:
54: * This product includes software developed by Mark Brinicombe.
55: * 4. The name of the company nor the name of the author may be used to
56: * endorse or promote products derived from this software without specific
57: * prior written permission.
58: *
59: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
60: * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
61: * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
62: * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
63: * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
64: * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
65: * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
66: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
67: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
68: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
69: * SUCH DAMAGE.
70: */
71: #include <sys/cdefs.h>
72:
73: #include <sys/param.h>
74: #include <sys/systm.h>
75:
76: #include <uvm/uvm_extern.h>
77:
78: #include <machine/bus.h>
79:
80: /* Prototypes for all the bus_space structure functions */
81: bs_protos(sa11x1);
82: bs_protos(generic);
83: bs_protos(generic_armv4);
84: bs_protos(bs_notimpl);
85:
86: struct bus_space sa11x1_bs_tag = {
87: /* cookie */
88: (void *) 0,
89:
90: /* mapping/unmapping */
91: sa11x1_bs_map,
92: sa11x1_bs_unmap,
93: sa11x1_bs_subregion,
94:
95: /* allocation/deallocation */
96: sa11x1_bs_alloc, /* not implemented */
97: sa11x1_bs_free, /* not implemented */
98:
99: /* get kernel virtual address */
100: sa11x1_bs_vaddr,
101:
102: /* mmap */
103: bs_notimpl_bs_mmap,
104:
105: /* barrier */
106: sa11x1_bs_barrier,
107:
108: /* read (single) */
109: bs_notimpl_bs_r_1,
110: bs_notimpl_bs_r_2,
111: generic_bs_r_4,
112: bs_notimpl_bs_r_8,
113:
114: /* read multiple */
115: bs_notimpl_bs_rm_1,
116: bs_notimpl_bs_rm_2,
117: generic_bs_rm_4,
118: bs_notimpl_bs_rm_8,
119:
120: /* read region */
121: /* XXX only word-wide transactions on APB */
122: generic_bs_rr_1,
123: generic_armv4_bs_rr_2,
124: generic_bs_rr_4,
125: bs_notimpl_bs_rr_8,
126:
127: /* write (single) */
128: bs_notimpl_bs_w_1,
129: bs_notimpl_bs_w_2,
130: generic_bs_w_4,
131: bs_notimpl_bs_w_8,
132:
133: /* write multiple */
134: bs_notimpl_bs_wm_1,
135: bs_notimpl_bs_wm_2,
136: generic_bs_wm_4,
137: bs_notimpl_bs_wm_8,
138:
139: /* write region */
140: /* XXX only word-wide transactions on APB */
141: generic_bs_wr_1,
142: generic_armv4_bs_wr_2,
143: generic_bs_wr_4,
144: bs_notimpl_bs_wr_8,
145:
146: /* set multiple */
147: bs_notimpl_bs_sm_1,
148: bs_notimpl_bs_sm_2,
149: bs_notimpl_bs_sm_4,
150: bs_notimpl_bs_sm_8,
151:
152: /* set region */
153: generic_bs_sr_1,
154: generic_armv4_bs_sr_2,
155: bs_notimpl_bs_sr_4,
156: bs_notimpl_bs_sr_8,
157:
158: /* copy */
159: bs_notimpl_bs_c_1,
160: generic_armv4_bs_c_2,
161: bs_notimpl_bs_c_4,
162: bs_notimpl_bs_c_8,
163: };
164:
165: int
166: sa11x1_bs_map(void *t, bus_addr_t bpa, bus_size_t size,
167: int flag, bus_space_handle_t *bshp)
168: {
169: u_long startpa, endpa, pa;
170: vaddr_t va;
171: pt_entry_t *pte;
172:
173: /* XXX add our base address so we can use offsets in our address space */
174: bpa = *(bus_addr_t *)sa11x1_bs_tag.bs_cookie + bpa;
175:
176: startpa = trunc_page(bpa);
177: endpa = round_page(bpa + size);
178:
179: /* XXX use extent manager to check duplicate mapping */
180:
181: va = uvm_km_valloc(kernel_map, endpa - startpa);
182: if (! va)
183: return(ENOMEM);
184:
185: *bshp = (bus_space_handle_t)(va + (bpa - startpa));
186:
187: for (pa = startpa; pa < endpa; pa += PAGE_SIZE, va += PAGE_SIZE) {
188: pmap_kenter_pa(va, pa, VM_PROT_READ | VM_PROT_WRITE);
189: if ((flag & BUS_SPACE_MAP_CACHEABLE) == 0) {
190: pte = vtopte(va);
191: *pte &= ~L2_S_CACHE_MASK;
192: PTE_SYNC(pte);
193: /* XXX: pmap_kenter_pa() also does PTE_SYNC(). a bit of
194: * waste.
195: */
196: }
197: }
198: pmap_update(pmap_kernel());
199:
200: return(0);
201: }
202:
203: void
204: sa11x1_bs_unmap(void *t, bus_space_handle_t bsh, bus_size_t size)
205: {
206:
207: if (bsh > (u_long)KERNEL_BASE)
208: return;
209:
210: uvm_km_free(kernel_map, bsh, size);
211: }
212:
213:
214: int
215: sa11x1_bs_subregion(void *t, bus_space_handle_t bsh, bus_size_t offset,
216: bus_size_t size, bus_space_handle_t *nbshp)
217: {
218:
219: *nbshp = bsh + offset;
220: return (0);
221: }
222:
223: void
224: sa11x1_bs_barrier(void *t, bus_space_handle_t bsh, bus_size_t offset,
225: bus_size_t len, int flags)
226: {
227:
228: /* Nothing to do. */
229: }
230:
231: void *
232: sa11x1_bs_vaddr(void *t, bus_space_handle_t bsh)
233: {
234:
235: return ((void *)bsh);
236: }
237:
238:
239: int
240: sa11x1_bs_alloc(void *t, bus_addr_t rstart, bus_addr_t rend,
241: bus_size_t size, bus_size_t alignment, bus_size_t boundary, int flags,
242: bus_addr_t *bpap, bus_space_handle_t *bshp)
243: {
244:
245: panic("sa11x1_io_bs_alloc(): not implemented");
246: }
247:
248: void
249: sa11x1_bs_free(void *t, bus_space_handle_t bsh, bus_size_t size)
250: {
251:
252: panic("sa11x1_io_bs_free(): not implemented");
253: }
254:
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