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 60ENTRY_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 76ENTRY_NP(GetCPSR) 77 mrs r0, cpsr /* Get the CPSR */ 78 79 RET 80 81