1 /* $NetBSD: fiq_subr.S,v 1.3 2002/04/12 18:50:31 thorpej Exp $ */
4 * Copyright (c) 2001 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.
40 #include <machine/armreg.h>
41 #include <machine/asm.h>
42 __FBSDID("$FreeBSD$");
45 * MODE_CHANGE_NOP should be inserted between a mode change and a
46 * banked register (R8--R15) access.
48 #if defined(CPU_ARM2) || defined(CPU_ARM250)
49 #define MODE_CHANGE_NOP mov r0, r0
51 #define MODE_CHANGE_NOP /* Data sheet says ARM3 doesn't need it */
54 #define SWITCH_TO_FIQ_MODE \
57 bic r2, r2, #(PSR_MODE) ; \
58 orr r2, r2, #(PSR_FIQ32_MODE) ; \
61 #define BACK_TO_SVC_MODE \
67 * Fetch the FIQ mode banked registers into the fiqhandler
82 * Load the FIQ mode banked registers from the fiqhandler
97 * Null handler copied down to the FIQ vector when the last
98 * FIQ handler is removed.
100 .global _C_LABEL(fiq_nullhandler), _C_LABEL(fiq_nullhandler_end)
101 _C_LABEL(fiq_nullhandler):
103 _C_LABEL(fiq_nullhandler_end):