1 /* $NetBSD: cpufunc_asm_ixp12x0.S,v 1.2 2002/08/17 16:36:31 thorpej Exp $ */
4 * Copyright (c) 2002 Wasabi Systems, Inc.
7 * Written by Jason R. Thorpe for Wasabi Systems, Inc.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
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
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.
39 #include <machine/asm.h>
40 __FBSDID("$FreeBSD$");
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.
46 ENTRY(ixp12x0_context_switch)
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.
55 mcr p15, 0, r0, c2, c0, 0
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 */
60 /* Make sure that pipeline is emptied */
65 ENTRY(ixp12x0_drain_readbuf)
66 mcr p15, 0, r0, c9, c0, 0 /* drain read buffer */
70 * Information for the IXP12X0 cache clean/purge functions:
72 * * Virtual address of the memory region to use
73 * * Size of memory region
77 .global _C_LABEL(ixp12x0_cache_clean_addr)
78 _C_LABEL(ixp12x0_cache_clean_addr):
81 .global _C_LABEL(ixp12x0_cache_clean_size)
82 _C_LABEL(ixp12x0_cache_clean_size):
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)