setcpsr.S revision 1.1.2.2
1 1.1.2.2 lukem /* $NetBSD: setcpsr.S,v 1.1.2.2 2001/08/03 04:10:59 lukem Exp $ */ 2 1.1.2.2 lukem 3 1.1.2.2 lukem /* 4 1.1.2.2 lukem * Copyright (c) 1994 Mark Brinicombe. 5 1.1.2.2 lukem * Copyright (c) 1994 Brini. 6 1.1.2.2 lukem * All rights reserved. 7 1.1.2.2 lukem * 8 1.1.2.2 lukem * This code is derived from software written for Brini by Mark Brinicombe 9 1.1.2.2 lukem * 10 1.1.2.2 lukem * Redistribution and use in source and binary forms, with or without 11 1.1.2.2 lukem * modification, are permitted provided that the following conditions 12 1.1.2.2 lukem * are met: 13 1.1.2.2 lukem * 1. Redistributions of source code must retain the above copyright 14 1.1.2.2 lukem * notice, this list of conditions and the following disclaimer. 15 1.1.2.2 lukem * 2. Redistributions in binary form must reproduce the above copyright 16 1.1.2.2 lukem * notice, this list of conditions and the following disclaimer in the 17 1.1.2.2 lukem * documentation and/or other materials provided with the distribution. 18 1.1.2.2 lukem * 3. All advertising materials mentioning features or use of this software 19 1.1.2.2 lukem * must display the following acknowledgement: 20 1.1.2.2 lukem * This product includes software developed by Brini. 21 1.1.2.2 lukem * 4. The name of the company nor the name of the author may be used to 22 1.1.2.2 lukem * endorse or promote products derived from this software without specific 23 1.1.2.2 lukem * prior written permission. 24 1.1.2.2 lukem * 25 1.1.2.2 lukem * THIS SOFTWARE IS PROVIDED BY BRINI ``AS IS'' AND ANY EXPRESS OR IMPLIED 26 1.1.2.2 lukem * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 27 1.1.2.2 lukem * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 28 1.1.2.2 lukem * IN NO EVENT SHALL BRINI OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 29 1.1.2.2 lukem * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 30 1.1.2.2 lukem * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 31 1.1.2.2 lukem * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 1.1.2.2 lukem * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 1.1.2.2 lukem * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 1.1.2.2 lukem * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 1.1.2.2 lukem * SUCH DAMAGE. 36 1.1.2.2 lukem * 37 1.1.2.2 lukem * RiscBSD kernel project 38 1.1.2.2 lukem * 39 1.1.2.2 lukem * setcpsr.S 40 1.1.2.2 lukem * 41 1.1.2.2 lukem * Miscellaneous routines to play with the CPSR register 42 1.1.2.2 lukem * 43 1.1.2.2 lukem * Eventually this routine can be inline assembly. 44 1.1.2.2 lukem * 45 1.1.2.2 lukem * Created : 12/09/94 46 1.1.2.2 lukem * 47 1.1.2.2 lukem * Based of kate/display/setcpsr.s 48 1.1.2.2 lukem */ 49 1.1.2.2 lukem 50 1.1.2.2 lukem #include <machine/asm.h> 51 1.1.2.2 lukem 52 1.1.2.2 lukem /* Sets and clears bits in the CPSR register 53 1.1.2.2 lukem * 54 1.1.2.2 lukem * r0 - bic mask 55 1.1.2.2 lukem * r1 - eor mask 56 1.1.2.2 lukem */ 57 1.1.2.2 lukem 58 1.1.2.2 lukem ENTRY_NP(SetCPSR) 59 1.1.2.2 lukem mrs r3, cpsr_all /* Set the CPSR */ 60 1.1.2.2 lukem bic r2, r3, r0 61 1.1.2.2 lukem eor r2, r2, r1 62 1.1.2.2 lukem msr cpsr_all, r2 63 1.1.2.2 lukem 64 1.1.2.2 lukem mov r0, r3 /* Return the old CPSR */ 65 1.1.2.2 lukem 66 1.1.2.2 lukem mov pc, lr 67 1.1.2.2 lukem 68 1.1.2.2 lukem 69 1.1.2.2 lukem /* Gets the CPSR register 70 1.1.2.2 lukem * 71 1.1.2.2 lukem * Returns the CPSR in r0 72 1.1.2.2 lukem */ 73 1.1.2.2 lukem 74 1.1.2.2 lukem ENTRY_NP(GetCPSR) 75 1.1.2.2 lukem mrs r0, cpsr_all /* Get the CPSR */ 76 1.1.2.2 lukem 77 1.1.2.2 lukem mov pc, lr 78 1.1.2.2 lukem 79
Indexes created Thu Oct 30 03:10:01 GMT 2025