93 lines
2.7 KiB
ArmAsm
93 lines
2.7 KiB
ArmAsm
/* $NetBSD: setcpsr.S,v 1.2 1996/06/03 21:25:00 mark Exp $ */
|
|
|
|
/*
|
|
* Copyright (c) 1994 Mark Brinicombe.
|
|
* Copyright (c) 1994 Brini.
|
|
* All rights reserved.
|
|
*
|
|
* This code is derived from software written for Brini by Mark Brinicombe
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by Brini.
|
|
* 4. The name of the company nor the name of the author may be used to
|
|
* endorse or promote products derived from this software without specific
|
|
* prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY BRINI ``AS IS'' AND ANY EXPRESS OR IMPLIED
|
|
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
|
|
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
|
* IN NO EVENT SHALL BRINI OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
|
|
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
|
|
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
|
|
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* RiscBSD kernel project
|
|
*
|
|
* setcpsr.S
|
|
*
|
|
* Miscellaneous routines to play with the CPSR register
|
|
*
|
|
* Eventually this routine can be inline assembly.
|
|
*
|
|
* Created : 12/09/94
|
|
*
|
|
* Based of kate/display/setcpsr.s
|
|
*/
|
|
|
|
fp .req r11
|
|
ip .req r12
|
|
sp .req r13
|
|
lr .req r14
|
|
pc .req r15
|
|
|
|
.text
|
|
|
|
.global _SetCPSR
|
|
|
|
/* Sets and clears bits in the CPSR register
|
|
*
|
|
* r0 - bic mask
|
|
* r1 - eor mask
|
|
*/
|
|
|
|
_SetCPSR:
|
|
/* mov ip, sp
|
|
stmfd sp!, {fp, ip, lr, pc}
|
|
sub fp, ip, #4*/
|
|
|
|
mrs r3, cpsr_all /* Set the CPSR */
|
|
bic r2, r3, r0
|
|
eor r2, r2, r1
|
|
msr cpsr_all, r2
|
|
|
|
mov r0, r3 /* Return the old CPSR */
|
|
|
|
/* ldmea fp, {fp, sp, pc}*/
|
|
mov pc, lr
|
|
|
|
.global _GetCPSR
|
|
|
|
/* Gets the CPSR register
|
|
*
|
|
* Returns the CPSR in r0
|
|
*/
|
|
|
|
_GetCPSR:
|
|
mrs r0, cpsr_all /* Get the CPSR */
|
|
|
|
mov pc, lr
|
|
|