1*e2c5185aSChristopher Kiick/* 2*e2c5185aSChristopher Kiick * CDDL HEADER START 3*e2c5185aSChristopher Kiick * 4*e2c5185aSChristopher Kiick * The contents of this file are subject to the terms of the 5*e2c5185aSChristopher Kiick * Common Development and Distribution License (the "License"). 6*e2c5185aSChristopher Kiick * You may not use this file except in compliance with the License. 7*e2c5185aSChristopher Kiick * 8*e2c5185aSChristopher Kiick * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9*e2c5185aSChristopher Kiick * or http://www.opensolaris.org/os/licensing. 10*e2c5185aSChristopher Kiick * See the License for the specific language governing permissions 11*e2c5185aSChristopher Kiick * and limitations under the License. 12*e2c5185aSChristopher Kiick * 13*e2c5185aSChristopher Kiick * When distributing Covered Code, include this CDDL HEADER in each 14*e2c5185aSChristopher Kiick * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15*e2c5185aSChristopher Kiick * If applicable, add the following below this CDDL HEADER, with the 16*e2c5185aSChristopher Kiick * fields enclosed by brackets "[]" replaced with your own identifying 17*e2c5185aSChristopher Kiick * information: Portions Copyright [yyyy] [name of copyright owner] 18*e2c5185aSChristopher Kiick * 19*e2c5185aSChristopher Kiick * CDDL HEADER END 20*e2c5185aSChristopher Kiick */ 21*e2c5185aSChristopher Kiick/* 22*e2c5185aSChristopher Kiick * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved. 23*e2c5185aSChristopher Kiick */ 24*e2c5185aSChristopher Kiick 25*e2c5185aSChristopher Kiick .file "smt_pause.s" 26*e2c5185aSChristopher Kiick 27*e2c5185aSChristopher Kiick#include <sys/asm_linkage.h> 28*e2c5185aSChristopher Kiick#include <../assym.h> 29*e2c5185aSChristopher Kiick 30*e2c5185aSChristopher Kiick/* 31*e2c5185aSChristopher Kiick * void smt_pause(void) 32*e2c5185aSChristopher Kiick * 33*e2c5185aSChristopher Kiick * Do nothing efficiently. 34*e2c5185aSChristopher Kiick */ 35*e2c5185aSChristopher Kiick 36*e2c5185aSChristopher Kiick#ifdef lint 37*e2c5185aSChristopher Kiickvoid 38*e2c5185aSChristopher Kiicksmt_pause(void) 39*e2c5185aSChristopher Kiick{ 40*e2c5185aSChristopher Kiick} 41*e2c5185aSChristopher Kiick#else 42*e2c5185aSChristopher Kiick#define BANKS (4 * 64) 43*e2c5185aSChristopher Kiick ENTRY(smt_pause) 44*e2c5185aSChristopher Kiick save %sp, -SA(MINFRAME+BANKS), %sp 45*e2c5185aSChristopher Kiick ld [%g7 + UL_LWPID], %i3 ! curthread->ul_lwpid 46*e2c5185aSChristopher Kiick add %fp, STACK_BIAS-BANKS, %i0 47*e2c5185aSChristopher Kiick and %i3, 0x3, %i2 ! save last 2 bits 48*e2c5185aSChristopher Kiick sllx %i2, 0x6, %i1 ! pick a slot 49*e2c5185aSChristopher Kiick add %i1, %i0, %o0 50*e2c5185aSChristopher Kiick casx [%o0], %g0, %g0 51*e2c5185aSChristopher Kiick casx [%o0], %g0, %g0 52*e2c5185aSChristopher Kiick ret 53*e2c5185aSChristopher Kiick restore 54*e2c5185aSChristopher Kiick SET_SIZE(smt_pause) 55*e2c5185aSChristopher Kiick#endif 56