sa11x0_io.c revision 1.11 
1/*	$NetBSD: sa11x0_io.c,v 1.11 2003/04/06 12:56:45 rjs Exp $	*/
2
3/*
4 * Copyright (c) 1997 Mark Brinicombe.
5 * Copyright (c) 1997 Causality Limited.
6 * All rights reserved.
7 *
8 * This code is derived from software contributed to The NetBSD Foundation
9 * by Ichiro FUKUHARA.
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 by Mark Brinicombe.
22 * 4. The name of the company nor the name of the author may be used to
23 *    endorse or promote products derived from this software without specific
24 *    prior written permission.
25 *
26 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
27 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
28 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
29 * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
30 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
31 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
32 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * SUCH DAMAGE.
37 */
38
39/*
40 * bus_space I/O functions for sa11x0
41 */
42
43#include <sys/param.h>
44#include <sys/systm.h>
45#include <sys/queue.h>
46
47#include <uvm/uvm.h>
48
49#include <machine/bus.h>
50#include <machine/pmap.h>
51
52/* Proto types for all the bus_space structure functions */
53
54bs_protos(sa11x0);
55bs_protos(bs_notimpl);
56
57/* Declare the sa11x0 bus space tag */
58
59struct bus_space sa11x0_bs_tag = {
60	/* cookie */
61	NULL,
62
63	/* mapping/unmapping */
64	sa11x0_bs_map,
65	sa11x0_bs_unmap,
66	sa11x0_bs_subregion,
67
68	/* allocation/deallocation */
69	sa11x0_bs_alloc,
70	sa11x0_bs_free,
71
72	/* get kernel virtual address */
73	sa11x0_bs_vaddr,
74
75	/* mmap bus space for userland */
76	sa11x0_bs_mmap,
77
78	/* barrier */
79	sa11x0_bs_barrier,
80
81	/* read (single) */
82	sa11x0_bs_r_1,
83	sa11x0_bs_r_2,
84	sa11x0_bs_r_4,
85	bs_notimpl_bs_r_8,
86
87	/* read multiple */
88	sa11x0_bs_rm_1,
89	sa11x0_bs_rm_2,
90	sa11x0_bs_rm_4,
91	bs_notimpl_bs_rm_8,
92
93	/* read region */
94	bs_notimpl_bs_rr_1,
95	sa11x0_bs_rr_2,
96	bs_notimpl_bs_rr_4,
97	bs_notimpl_bs_rr_8,
98
99	/* write (single) */
100	sa11x0_bs_w_1,
101	sa11x0_bs_w_2,
102	sa11x0_bs_w_4,
103	bs_notimpl_bs_w_8,
104
105	/* write multiple */
106	sa11x0_bs_wm_1,
107	sa11x0_bs_wm_2,
108	sa11x0_bs_wm_4,
109	bs_notimpl_bs_wm_8,
110
111	/* write region */
112	bs_notimpl_bs_wr_1,
113	sa11x0_bs_wr_2,
114	bs_notimpl_bs_wr_4,
115	bs_notimpl_bs_wr_8,
116
117	/* set multiple */
118	bs_notimpl_bs_sm_1,
119	bs_notimpl_bs_sm_2,
120	bs_notimpl_bs_sm_4,
121	bs_notimpl_bs_sm_8,
122
123	/* set region */
124	bs_notimpl_bs_sr_1,
125	sa11x0_bs_sr_2,
126	bs_notimpl_bs_sr_4,
127	bs_notimpl_bs_sr_8,
128
129	/* copy */
130	bs_notimpl_bs_c_1,
131	sa11x0_bs_c_2,
132	bs_notimpl_bs_c_4,
133	bs_notimpl_bs_c_8,
134};
135
136/* bus space functions */
137
138int
139sa11x0_bs_map(t, bpa, size, cacheable, bshp)
140	void *t;
141	bus_addr_t bpa;
142	bus_size_t size;
143	int cacheable;
144	bus_space_handle_t *bshp;
145{
146	u_long startpa, endpa, pa;
147	vaddr_t va;
148	pt_entry_t *pte;
149
150#ifdef hpcarm
151	if ((u_long)bpa > (u_long)KERNEL_BASE) {
152		/* XXX This is a temporary hack to aid transition. */
153		*bshp = bpa;
154		return(0);
155	}
156#endif
157
158	startpa = trunc_page(bpa);
159	endpa = round_page(bpa + size);
160
161	/* XXX use extent manager to check duplicate mapping */
162
163	va = uvm_km_valloc(kernel_map, endpa - startpa);
164	if (! va)
165		return(ENOMEM);
166
167	*bshp = (bus_space_handle_t)(va + (bpa - startpa));
168
169	for(pa = startpa; pa < endpa; pa += PAGE_SIZE, va += PAGE_SIZE) {
170		pmap_kenter_pa(va, pa, VM_PROT_READ | VM_PROT_WRITE);
171		pte = vtopte(va);
172		if (cacheable == 0) {
173			*pte &= ~L2_S_CACHE_MASK;
174			PTE_SYNC(pte);
175		}
176	}
177	pmap_update(pmap_kernel());
178
179	return(0);
180}
181
182int
183sa11x0_bs_alloc(t, rstart, rend, size, alignment, boundary, cacheable,
184    bpap, bshp)
185	void *t;
186	bus_addr_t rstart, rend;
187	bus_size_t size, alignment, boundary;
188	int cacheable;
189	bus_addr_t *bpap;
190	bus_space_handle_t *bshp;
191{
192	panic("sa11x0_alloc(): Help!");
193}
194
195
196void
197sa11x0_bs_unmap(t, bsh, size)
198	void *t;
199	bus_space_handle_t bsh;
200	bus_size_t size;
201{
202	/*
203	 * Temporary implementation
204	 */
205}
206
207void
208sa11x0_bs_free(t, bsh, size)
209	void *t;
210	bus_space_handle_t bsh;
211	bus_size_t size;
212{
213
214	panic("sa11x0_free(): Help!");
215	/* sa11x0_unmap() does all that we need to do. */
216/*	sa11x0_unmap(t, bsh, size);*/
217}
218
219int
220sa11x0_bs_subregion(t, bsh, offset, size, nbshp)
221	void *t;
222	bus_space_handle_t bsh;
223	bus_size_t offset, size;
224	bus_space_handle_t *nbshp;
225{
226
227	*nbshp = bsh + offset;
228	return (0);
229}
230
231paddr_t
232sa11x0_bs_mmap(t, paddr, offset, prot, flags)
233	void *t;
234	bus_addr_t paddr;
235	off_t offset;
236	int prot;
237	int flags;
238{
239	/*
240	 * mmap from address `paddr+offset' for one page
241	 */
242	 return (arm_btop((paddr + offset)));
243}
244
245void *
246sa11x0_bs_vaddr(t, bsh)
247	void *t;
248	bus_space_handle_t bsh;
249{
250	return ((void *)bsh);
251}
252
253void
254sa11x0_bs_barrier(t, bsh, offset, len, flags)
255	void *t;
256	bus_space_handle_t bsh;
257	bus_size_t offset, len;
258	int flags;
259{
260/* NULL */
261}
262
263/* End of sa11x0_io.c */
264