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      1 /*	$NetBSD: setcpsr.S,v 1.3 2013/08/18 06:29:29 matt 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 #include <machine/asm.h>
     51 
     52 /* Sets and clears bits in the CPSR register
     53  *
     54  *  r0 - bic mask
     55  *  r1 - eor mask
     56  */
     57 
     58 ENTRY_NP(SetCPSR)
     59         mrs     r3, cpsr		/* Set the CPSR */
     60 	bic	r2, r3, r0
     61         eor     r2, r2, r1
     62         msr     cpsr_all, r2
     63 
     64         mov	r0, r3			/* Return the old CPSR */
     65 
     66 	RET
     67 END(SetCPSR)
     68 
     69 
     70 /* Gets the CPSR register
     71  *
     72  * Returns the CPSR in r0
     73  */
     74 
     75 ENTRY_NP(GetCPSR)
     76         mrs     r0, cpsr		/* Get the CPSR */
     77 	RET
     78 END(GetCPSR)
     79