FreeBSD/Linux Kernel Cross Reference
sys/arm/arm/setcpsr.S
1 /* $NetBSD: setcpsr.S,v 1.2 2002/08/15 01:37:02 briggs Exp $ */
2
3 /*-
4 * Copyright (c) 1994 Mark Brinicombe.
5 * Copyright (c) 1994 Brini.
6 * All rights reserved.
7 *
8 * This code is derived from software written for Brini by Mark Brinicombe
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. All advertising materials mentioning features or use of this software
19 * must display the following acknowledgement:
20 * This product includes software developed by Brini.
21 * 4. The name of the company nor the name of the author may be used to
22 * endorse or promote products derived from this software without specific
23 * prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY BRINI ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
28 * IN NO EVENT SHALL BRINI OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
29 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
30 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
31 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 * SUCH DAMAGE.
36 *
37 * RiscBSD kernel project
38 *
39 * setcpsr.S
40 *
41 * Miscellaneous routines to play with the CPSR register
42 *
43 * Eventually this routine can be inline assembly.
44 *
45 * Created : 12/09/94
46 *
47 * Based of kate/display/setcpsr.s
48 *
49 */
50
51 #include <machine/asm.h>
52 __FBSDID("$FreeBSD$");
53
54 /* Sets and clears bits in the CPSR register
55 *
56 * r0 - bic mask
57 * r1 - eor mask
58 */
59
60 ENTRY_NP(SetCPSR)
61 mrs r3, cpsr /* Set the CPSR */
62 bic r2, r3, r0
63 eor r2, r2, r1
64 msr cpsr_all, r2
65
66 mov r0, r3 /* Return the old CPSR */
67
68 RET
69
70
71 /* Gets the CPSR register
72 *
73 * Returns the CPSR in r0
74 */
75
76 ENTRY_NP(GetCPSR)
77 mrs r0, cpsr /* Get the CPSR */
78
79 RET
80
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