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/* * CDDL HEADER START * * The contents of this file are subject to the terms of the * Common Development and Distribution License (the "License"). * You may not use this file except in compliance with the License. * * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE * or http://www.opensolaris.org/os/licensing. * See the License for the specific language governing permissions * and limitations under the License. * * When distributing Covered Code, include this CDDL HEADER in each * file and include the License file at usr/src/OPENSOLARIS.LICENSE. * If applicable, add the following below this CDDL HEADER, with the * fields enclosed by brackets "[]" replaced with your own identifying * information: Portions Copyright [yyyy] [name of copyright owner] * * CDDL HEADER END */ /* * Copyright 2007 Sun Microsystems, Inc. All rights reserved. * Use is subject to license terms. */ .ident "%Z%%M% %I% %E% SMI" .file "%M%" #define _ASM #include <sys/asm_linkage.h> #include <machine/asi.h> /* Userland needs different ASIs. */ #ifdef _KERNEL #define __ASI_ATOMIC ASI_N #else #define __ASI_ATOMIC ASI_P #endif /* * NOTE: If atomic_add_64 and atomic_add_64_nv are ever * separated, you need to also edit the libc sparcv9 platform * specific mapfile and remove the NODYNSORT attribute * from atomic_add_64_nv. */ ENTRY(atomic_add_64) ALTENTRY(atomic_add_64_nv) ALTENTRY(atomic_add_ptr) ALTENTRY(atomic_add_ptr_nv) ALTENTRY(atomic_add_long) ALTENTRY(atomic_add_long_nv) add_64: ldx [%o0], %o2 1: add %o2, %o1, %o3 casxa [%o0] __ASI_ATOMIC, %o2, %o3 cmp %o2, %o3 bne,a,pn %xcc, 1b mov %o3, %o2 retl add %o2, %o1, %o0 ! return new value SET_SIZE(atomic_add_long_nv) SET_SIZE(atomic_add_long) SET_SIZE(atomic_add_ptr_nv) SET_SIZE(atomic_add_ptr) SET_SIZE(atomic_add_64_nv) SET_SIZE(atomic_add_64) /* * NOTE: If atomic_or_8 and atomic_or_8_nv are ever * separated, you need to also edit the libc sparcv9 platform * specific mapfile and remove the NODYNSORT attribute * from atomic_or_8_nv. */ ENTRY(atomic_or_8) ALTENTRY(atomic_or_8_nv) ALTENTRY(atomic_or_uchar) and %o0, 0x3, %o4 ! %o4 = byte offset, left-to-right xor %o4, 0x3, %g1 ! %g1 = byte offset, right-to-left sll %g1, 3, %g1 ! %g1 = bit offset, right-to-left set 0xff, %o3 ! %o3 = mask sll %o3, %g1, %o3 ! %o3 = shifted to bit offset sll %o1, %g1, %o1 ! %o1 = shifted to bit offset and %o1, %o3, %o1 ! %o1 = single byte value andn %o0, 0x3, %o0 ! %o0 = word address ld [%o0], %o2 ! read old value 1: or %o2, %o1, %o5 ! or in the new value casa [%o0] __ASI_ATOMIC, %o2, %o5 cmp %o2, %o5 bne,a,pn %icc, 1b mov %o5, %o2 ! %o2 = old value or %o2, %o1, %o5 and %o5, %o3, %o5 retl srl %o5, %g1, %o0 ! %o0 = new value SET_SIZE(atomic_or_uchar) SET_SIZE(atomic_or_8_nv) SET_SIZE(atomic_or_8) /* * Spitfires and Blackbirds have a problem with membars in the * delay slot (SF_ERRATA_51). For safety's sake, we assume * that the whole world needs the workaround. */ ENTRY(membar_producer) membar #StoreStore retl nop SET_SIZE(membar_producer)