1 /* $NetBSD: footbridge_machdep.c,v 1.11 2021/08/17 22:00:27 andvar Exp $ */
2
3 /*
4 * Copyright (c) 1997 Mark Brinicombe.
5 * Copyright (c) 1997 Causality Limited
6 * All rights reserved.
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 by Mark Brinicombe
19 * for the NetBSD Project.
20 * 4. The name of the company nor the name of the author may be used to
21 * endorse or promote products derived from this software without specific
22 * prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
25 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
26 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
27 * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
28 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
29 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
30 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 */
36
37 #include <sys/cdefs.h>
38 __KERNEL_RCSID(0, "$NetBSD: footbridge_machdep.c,v 1.11 2021/08/17 22:00:27 andvar Exp $");
39
40 #include <sys/param.h>
41 #include <sys/systm.h>
42 #include <uvm/uvm_extern.h>
43 #include <machine/pmap.h>
44 #include <arm/footbridge/footbridge.h>
45 #include <arm/footbridge/dc21285mem.h>
46
47 /*
48 * For optimal cache cleaning we need two 16K banks of
49 * virtual address space that NOTHING else will access
50 * and then we alternate the cache cleaning between the
51 * two banks.
52 * The cache cleaning code requires 2 banks aligned
53 * on total size boundary so the banks can be alternated by
54 * xorring the size bit (assumes the bank size is a power of 2)
55 *
56 * On the DC21285 we have a special cache clean area so we will
57 * use it.
58 */
59
60 extern unsigned int sa1_cache_clean_addr;
61 extern unsigned int sa1_cache_clean_size;
62
63 void
footbridge_sa110_cc_setup(void)64 footbridge_sa110_cc_setup(void)
65 {
66 sa1_cache_clean_addr = DC21285_CACHE_FLUSH_VBASE;
67 sa1_cache_clean_size = (PAGE_SIZE * 4);
68 }
69