79 lines
2.5 KiB
ArmAsm
79 lines
2.5 KiB
ArmAsm
/* $NetBSD: setcpsr.S,v 1.1 2001/07/28 13:28:03 chris Exp $ */
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/*
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* Copyright (c) 1994 Mark Brinicombe.
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* Copyright (c) 1994 Brini.
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* All rights reserved.
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*
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* This code is derived from software written for Brini by Mark Brinicombe
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Brini.
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* 4. The name of the company nor the name of the author may be used to
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* endorse or promote products derived from this software without specific
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* prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY BRINI ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL BRINI OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* RiscBSD kernel project
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*
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* setcpsr.S
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*
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* Miscellaneous routines to play with the CPSR register
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*
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* Eventually this routine can be inline assembly.
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*
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* Created : 12/09/94
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*
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* Based of kate/display/setcpsr.s
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*/
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#include <machine/asm.h>
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/* Sets and clears bits in the CPSR register
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*
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* r0 - bic mask
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* r1 - eor mask
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*/
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ENTRY_NP(SetCPSR)
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mrs r3, cpsr_all /* Set the CPSR */
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bic r2, r3, r0
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eor r2, r2, r1
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msr cpsr_all, r2
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mov r0, r3 /* Return the old CPSR */
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mov pc, lr
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/* Gets the CPSR register
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*
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* Returns the CPSR in r0
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*/
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ENTRY_NP(GetCPSR)
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mrs r0, cpsr_all /* Get the CPSR */
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mov pc, lr
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