1*e17dd72aSJens Wiklander/* 2*e17dd72aSJens Wiklander * Copyright (c) 2015-2016, Linaro Limited 3*e17dd72aSJens Wiklander * All rights reserved. 4*e17dd72aSJens Wiklander * 5*e17dd72aSJens Wiklander * Redistribution and use in source and binary forms, with or without 6*e17dd72aSJens Wiklander * modification, are permitted provided that the following conditions are met: 7*e17dd72aSJens Wiklander * 8*e17dd72aSJens Wiklander * 1. Redistributions of source code must retain the above copyright notice, 9*e17dd72aSJens Wiklander * this list of conditions and the following disclaimer. 10*e17dd72aSJens Wiklander * 11*e17dd72aSJens Wiklander * 2. Redistributions in binary form must reproduce the above copyright notice, 12*e17dd72aSJens Wiklander * this list of conditions and the following disclaimer in the documentation 13*e17dd72aSJens Wiklander * and/or other materials provided with the distribution. 14*e17dd72aSJens Wiklander * 15*e17dd72aSJens Wiklander * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 16*e17dd72aSJens Wiklander * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17*e17dd72aSJens Wiklander * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18*e17dd72aSJens Wiklander * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 19*e17dd72aSJens Wiklander * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 20*e17dd72aSJens Wiklander * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 21*e17dd72aSJens Wiklander * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 22*e17dd72aSJens Wiklander * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 23*e17dd72aSJens Wiklander * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 24*e17dd72aSJens Wiklander * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 25*e17dd72aSJens Wiklander * POSSIBILITY OF SUCH DAMAGE. 26*e17dd72aSJens Wiklander */ 27*e17dd72aSJens Wiklander 28*e17dd72aSJens Wiklander#include <asm.S> 29*e17dd72aSJens Wiklander 30*e17dd72aSJens Wiklander/* uint32_t atomic_inc32(uint32_t *v); */ 31*e17dd72aSJens WiklanderFUNC atomic_inc32 , : 32*e17dd72aSJens Wiklander ldrex r1, [r0] 33*e17dd72aSJens Wiklander add r1, r1, #1 34*e17dd72aSJens Wiklander strex r2, r1, [r0] 35*e17dd72aSJens Wiklander cmp r2, #0 36*e17dd72aSJens Wiklander bne atomic_inc32 37*e17dd72aSJens Wiklander mov r0, r1 38*e17dd72aSJens Wiklander bx lr 39*e17dd72aSJens WiklanderEND_FUNC atomic_inc32 40*e17dd72aSJens Wiklander 41*e17dd72aSJens Wiklander/* uint32_t atomic_dec32(uint32_t *v); */ 42*e17dd72aSJens WiklanderFUNC atomic_dec32 , : 43*e17dd72aSJens Wiklander ldrex r1, [r0] 44*e17dd72aSJens Wiklander sub r1, r1, #1 45*e17dd72aSJens Wiklander strex r2, r1, [r0] 46*e17dd72aSJens Wiklander cmp r2, #0 47*e17dd72aSJens Wiklander bne atomic_dec32 48*e17dd72aSJens Wiklander mov r0, r1 49*e17dd72aSJens Wiklander bx lr 50*e17dd72aSJens WiklanderEND_FUNC atomic_dec32 51