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("$FreeBSD$");
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 */
46ENTRY(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
65ENTRY(ixp12x0_drain_readbuf)
66	mcr	p15, 0, r0, c9, c0, 0		/* drain read buffer */
67	RET
68
69/*
70 * Information for the IXP12X0 cache clean/purge functions:
71 *
72 *      * Virtual address of the memory region to use
73 *      * Size of memory region
74 */
75	.data
76
77	.global _C_LABEL(ixp12x0_cache_clean_addr)
78_C_LABEL(ixp12x0_cache_clean_addr):
79        .word   0xf0000000
80
81	.global _C_LABEL(ixp12x0_cache_clean_size)
82_C_LABEL(ixp12x0_cache_clean_size):
83	.word   0x00008000
84
85	.text
86
87.Lixp12x0_cache_clean_addr:
88	.word   _C_LABEL(ixp12x0_cache_clean_addr)
89.Lixp12x0_cache_clean_size:
90	.word   _C_LABEL(ixp12x0_cache_clean_size)
91