1 /* $NetBSD: cpufunc_asm_ixp12x0.S,v 1.2 2002/08/17 16:36:31 thorpej Exp $ */
2
3 /*-
4 * Copyright (c) 2002 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
39 #include <machine/asm.h>
40 __FBSDID("$FreeBSD: releng/10.0/sys/arm/arm/cpufunc_asm_ixp12x0.S 248361 2013-03-16 02:48:49Z andrew $");
41
42 /*
43 * This function is the same as sa110_context_switch for now, the plan
44 * is to make use of the process id register to avoid cache flushes.
45 */
46 ENTRY(ixp12x0_context_switch)
47 /*
48 * CF_CACHE_PURGE_ID will *ALWAYS* be called prior to this.
49 * Thus the data cache will contain only kernel data and the
50 * instruction cache will contain only kernel code, and all
51 * kernel mappings are shared by all processes.
52 */
53
54 /* Write the TTB */
55 mcr p15, 0, r0, c2, c0, 0
56
57 /* If we have updated the TTB we must flush the TLB */
58 mcr p15, 0, r0, c8, c7, 0 /* flush the I+D tlb */
59
60 /* Make sure that pipeline is emptied */
61 mov r0, r0
62 mov r0, r0
63 RET
64 END(ixp12x0_context_switch)
65
66 ENTRY(ixp12x0_drain_readbuf)
67 mcr p15, 0, r0, c9, c0, 0 /* drain read buffer */
68 RET
69 END(ixp12x0_drain_readbuf)
70
71 /*
72 * Information for the IXP12X0 cache clean/purge functions:
73 *
74 * * Virtual address of the memory region to use
75 * * Size of memory region
76 */
77 .data
78
79 .global _C_LABEL(ixp12x0_cache_clean_addr)
80 _C_LABEL(ixp12x0_cache_clean_addr):
81 .word 0xf0000000
82
83 .global _C_LABEL(ixp12x0_cache_clean_size)
84 _C_LABEL(ixp12x0_cache_clean_size):
85 .word 0x00008000
86
87 .text
88
89 .Lixp12x0_cache_clean_addr:
90 .word _C_LABEL(ixp12x0_cache_clean_addr)
91 .Lixp12x0_cache_clean_size:
92 .word _C_LABEL(ixp12x0_cache_clean_size)
Cache object: 050ee8ef34acdf79fce85b6db8a1f703
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