1*5d9d9091SRichard Lowe/* 2*5d9d9091SRichard Lowe * CDDL HEADER START 3*5d9d9091SRichard Lowe * 4*5d9d9091SRichard Lowe * The contents of this file are subject to the terms of the 5*5d9d9091SRichard Lowe * Common Development and Distribution License (the "License"). 6*5d9d9091SRichard Lowe * You may not use this file except in compliance with the License. 7*5d9d9091SRichard Lowe * 8*5d9d9091SRichard Lowe * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9*5d9d9091SRichard Lowe * or http://www.opensolaris.org/os/licensing. 10*5d9d9091SRichard Lowe * See the License for the specific language governing permissions 11*5d9d9091SRichard Lowe * and limitations under the License. 12*5d9d9091SRichard Lowe * 13*5d9d9091SRichard Lowe * When distributing Covered Code, include this CDDL HEADER in each 14*5d9d9091SRichard Lowe * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15*5d9d9091SRichard Lowe * If applicable, add the following below this CDDL HEADER, with the 16*5d9d9091SRichard Lowe * fields enclosed by brackets "[]" replaced with your own identifying 17*5d9d9091SRichard Lowe * information: Portions Copyright [yyyy] [name of copyright owner] 18*5d9d9091SRichard Lowe * 19*5d9d9091SRichard Lowe * CDDL HEADER END 20*5d9d9091SRichard Lowe */ 21*5d9d9091SRichard Lowe 22*5d9d9091SRichard Lowe/* 23*5d9d9091SRichard Lowe * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved. 24*5d9d9091SRichard Lowe */ 25*5d9d9091SRichard Lowe 26*5d9d9091SRichard Lowe .file "smt_pause.s" 27*5d9d9091SRichard Lowe 28*5d9d9091SRichard Lowe/* 29*5d9d9091SRichard Lowe * void smt_pause(void) 30*5d9d9091SRichard Lowe * 31*5d9d9091SRichard Lowe * Do nothing efficiently. 32*5d9d9091SRichard Lowe * 33*5d9d9091SRichard Lowe */ 34*5d9d9091SRichard Lowe 35*5d9d9091SRichard Lowe#include <sys/asm_linkage.h> 36*5d9d9091SRichard Lowe#include <sys/niagaraasi.h> 37*5d9d9091SRichard Lowe#include <sys/asi.h> 38*5d9d9091SRichard Lowe#include <sys/stack.h> 39*5d9d9091SRichard Lowe 40*5d9d9091SRichard Lowe#if defined(NIAGARA_IMPL) 41*5d9d9091SRichard Lowe#include <assym.h> 42*5d9d9091SRichard Lowe#endif 43*5d9d9091SRichard Lowe 44*5d9d9091SRichard Lowe ENTRY(smt_pause) 45*5d9d9091SRichard Lowe#if defined(NIAGARA2_IMPL) || defined(VFALLS_IMPL) || defined(KT_IMPL) 46*5d9d9091SRichard Lowe rd %ccr, %g0 47*5d9d9091SRichard Lowe rd %ccr, %g0 48*5d9d9091SRichard Lowe retl 49*5d9d9091SRichard Lowe rd %ccr, %g0 50*5d9d9091SRichard Lowe#else /* NIAGARA2_IMPL */ 51*5d9d9091SRichard Lowe#define BANKS (4 * 64) /* 4 cachelines, cover all banks */ 52*5d9d9091SRichard Lowe save %sp, -SA(MINFRAME+BANKS), %sp 53*5d9d9091SRichard Lowe 54*5d9d9091SRichard Lowe ld [%g7 + UL_LWPID], %i3 ! curthread->ul_lwpid 55*5d9d9091SRichard Lowe add %fp, STACK_BIAS-BANKS, %i0 56*5d9d9091SRichard Lowe and %i3, 0x3, %i2 ! save last 2 bits 57*5d9d9091SRichard Lowe sllx %i2, 0x6, %i1 ! pick a slot 58*5d9d9091SRichard Lowe add %i1, %i0, %o0 59*5d9d9091SRichard Lowe 60*5d9d9091SRichard Lowe casx [%o0], %g0, %g0 61*5d9d9091SRichard Lowe casx [%o0], %g0, %g0 62*5d9d9091SRichard Lowe casx [%o0], %g0, %g0 63*5d9d9091SRichard Lowe ret 64*5d9d9091SRichard Lowe restore 65*5d9d9091SRichard Lowe#endif /* NIAGARA2_IMPL */ 66*5d9d9091SRichard Lowe SET_SIZE(smt_pause) 67*5d9d9091SRichard Lowe 68