/* $NetBSD: atomic.S,v 1.16 2011/01/12 23:12:10 joerg Exp $ */ /*- * Copyright (c) 2007 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Jason R. Thorpe, and by Andrew Doran. * * 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. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``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 THE FOUNDATION 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. */ #include #include #ifdef _KERNEL #define ALIAS(f, t) STRONG_ALIAS(f,t) #else #define ALIAS(f, t) WEAK_ALIAS(f,t) #endif #ifdef _HARDKERNEL #define LOCK(n) .Lpatch ## n: lock #define ENDLABEL(a) _ALIGN_TEXT; LABEL(a) #else #define LOCK(n) lock #define ENDLABEL(a) /* nothing */ #endif .text /* 32-bit */ ENTRY(_atomic_add_32) LOCK(1) addl %esi, (%rdi) ret ENTRY(_atomic_add_32_nv) movl %esi, %eax LOCK(2) xaddl %eax, (%rdi) addl %esi, %eax ret ENTRY(_atomic_and_32) LOCK(3) andl %esi, (%rdi) ret ENTRY(_atomic_and_32_nv) movl (%rdi), %eax 1: movl %eax, %ecx andl %esi, %ecx LOCK(4) cmpxchgl %ecx, (%rdi) jnz 1b movl %ecx, %eax ret ENTRY(_atomic_dec_32) LOCK(5) decl (%rdi) ret ENTRY(_atomic_dec_32_nv) movl $-1, %eax LOCK(6) xaddl %eax, (%rdi) decl %eax ret ENTRY(_atomic_inc_32) LOCK(7) incl (%rdi) ret ENTRY(_atomic_inc_32_nv) movl $1, %eax LOCK(8) xaddl %eax, (%rdi) incl %eax ret ENTRY(_atomic_or_32) LOCK(9) orl %esi, (%rdi) ret ENTRY(_atomic_or_32_nv) movl (%rdi), %eax 1: movl %eax, %ecx orl %esi, %ecx LOCK(10) cmpxchgl %ecx, (%rdi) jnz 1b movl %ecx, %eax ret ENTRY(_atomic_swap_32) movl %esi, %eax xchgl %eax, (%rdi) ret ENTRY(_atomic_cas_32) movl %esi, %eax LOCK(12) cmpxchgl %edx, (%rdi) /* %eax now contains the old value */ ret ENTRY(_atomic_cas_32_ni) movl %esi, %eax cmpxchgl %edx, (%rdi) /* %eax now contains the old value */ ret /* 64-bit */ ENTRY(_atomic_add_64) LOCK(13) addq %rsi, (%rdi) ret ENTRY(_atomic_add_64_nv) movq %rsi, %rax LOCK(14) xaddq %rax, (%rdi) addq %rsi, %rax ret ENTRY(_atomic_and_64) LOCK(15) andq %rsi, (%rdi) ret ENTRY(_atomic_and_64_nv) movq (%rdi), %rax 1: movq %rax, %rcx andq %rsi, %rcx LOCK(16) cmpxchgq %rcx, (%rdi) jnz 1b movq %rcx, %rax ret ENTRY(_atomic_dec_64) LOCK(17) decq (%rdi) ret ENTRY(_atomic_dec_64_nv) movq $-1, %rax LOCK(18) xaddq %rax, (%rdi) decq %rax ret ENTRY(_atomic_inc_64) LOCK(19) incq (%rdi) ret ENTRY(_atomic_inc_64_nv) movq $1, %rax LOCK(20) xaddq %rax, (%rdi) incq %rax ret ENTRY(_atomic_or_64) LOCK(21) orq %rsi, (%rdi) ret ENTRY(_atomic_or_64_nv) movq (%rdi), %rax 1: movq %rax, %rcx orq %rsi, %rcx LOCK(22) cmpxchgq %rcx, (%rdi) jnz 1b movq %rcx, %rax ret ENTRY(_atomic_swap_64) movq %rsi, %rax xchgq %rax, (%rdi) ret ENTRY(_atomic_cas_64) movq %rsi, %rax LOCK(24) cmpxchgq %rdx, (%rdi) /* %eax now contains the old value */ ret ENTRY(_atomic_cas_64_ni) movq %rsi, %rax cmpxchgq %rdx, (%rdi) /* %eax now contains the old value */ ret /* memory barriers */ ENTRY(_membar_consumer) LOCK(25) addq $0, -8(%rsp) ret ENDLABEL(membar_consumer_end) ENTRY(_membar_producer) /* A store is enough */ movq $0, -8(%rsp) ret ENDLABEL(membar_producer_end) ENTRY(_membar_sync) LOCK(26) addq $0, -8(%rsp) ret ENDLABEL(membar_sync_end) #ifdef _HARDKERNEL ENTRY(sse2_lfence) lfence ret ENDLABEL(sse2_lfence_end) ENTRY(sse2_mfence) mfence ret ENDLABEL(sse2_mfence_end) atomic_lockpatch: .globl atomic_lockpatch .quad .Lpatch1, .Lpatch2, .Lpatch3, .Lpatch4, .Lpatch5 .quad .Lpatch6, .Lpatch7, .Lpatch8, .Lpatch9, .Lpatch10 .quad .Lpatch12, .Lpatch13, .Lpatch14, .Lpatch15 .quad .Lpatch16, .Lpatch17, .Lpatch18, .Lpatch19, .Lpatch20 .quad .Lpatch21, .Lpatch22, .Lpatch24, .Lpatch25 .quad .Lpatch26, 0 #endif /* _HARDKERNEL */ ALIAS(atomic_add_32,_atomic_add_32) ALIAS(atomic_add_64,_atomic_add_64) ALIAS(atomic_add_int,_atomic_add_32) ALIAS(atomic_add_long,_atomic_add_64) ALIAS(atomic_add_ptr,_atomic_add_64) ALIAS(atomic_add_32_nv,_atomic_add_32_nv) ALIAS(atomic_add_64_nv,_atomic_add_64_nv) ALIAS(atomic_add_int_nv,_atomic_add_32_nv) ALIAS(atomic_add_long_nv,_atomic_add_64_nv) ALIAS(atomic_add_ptr_nv,_atomic_add_64_nv) ALIAS(atomic_and_32,_atomic_and_32) ALIAS(atomic_and_64,_atomic_and_64) ALIAS(atomic_and_uint,_atomic_and_32) ALIAS(atomic_and_ulong,_atomic_and_64) ALIAS(atomic_and_ptr,_atomic_and_64) ALIAS(atomic_and_32_nv,_atomic_and_32_nv) ALIAS(atomic_and_64_nv,_atomic_and_64_nv) ALIAS(atomic_and_uint_nv,_atomic_and_32_nv) ALIAS(atomic_and_ulong_nv,_atomic_and_64_nv) ALIAS(atomic_and_ptr_nv,_atomic_and_64_nv) ALIAS(atomic_dec_32,_atomic_dec_32) ALIAS(atomic_dec_64,_atomic_dec_64) ALIAS(atomic_dec_uint,_atomic_dec_32) ALIAS(atomic_dec_ulong,_atomic_dec_64) ALIAS(atomic_dec_ptr,_atomic_dec_64) ALIAS(atomic_dec_32_nv,_atomic_dec_32_nv) ALIAS(atomic_dec_64_nv,_atomic_dec_64_nv) ALIAS(atomic_dec_uint_nv,_atomic_dec_32_nv) ALIAS(atomic_dec_ulong_nv,_atomic_dec_64_nv) ALIAS(atomic_dec_ptr_nv,_atomic_dec_64_nv) ALIAS(atomic_inc_32,_atomic_inc_32) ALIAS(atomic_inc_64,_atomic_inc_64) ALIAS(atomic_inc_uint,_atomic_inc_32) ALIAS(atomic_inc_ulong,_atomic_inc_64) ALIAS(atomic_inc_ptr,_atomic_inc_64) ALIAS(atomic_inc_32_nv,_atomic_inc_32_nv) ALIAS(atomic_inc_64_nv,_atomic_inc_64_nv) ALIAS(atomic_inc_uint_nv,_atomic_inc_32_nv) ALIAS(atomic_inc_ulong_nv,_atomic_inc_64_nv) ALIAS(atomic_inc_ptr_nv,_atomic_inc_64_nv) ALIAS(atomic_or_32,_atomic_or_32) ALIAS(atomic_or_uint,_atomic_or_32) ALIAS(atomic_or_ulong,_atomic_or_64) ALIAS(atomic_or_ptr,_atomic_or_64) ALIAS(atomic_or_32_nv,_atomic_or_32_nv) ALIAS(atomic_or_64_nv,_atomic_or_64_nv) ALIAS(atomic_or_uint_nv,_atomic_or_32_nv) ALIAS(atomic_or_ulong_nv,_atomic_or_64_nv) ALIAS(atomic_or_ptr_nv,_atomic_or_64_nv) ALIAS(atomic_swap_32,_atomic_swap_32) ALIAS(atomic_swap_64,_atomic_swap_64) ALIAS(atomic_swap_uint,_atomic_swap_32) ALIAS(atomic_swap_ulong,_atomic_swap_64) ALIAS(atomic_swap_ptr,_atomic_swap_64) ALIAS(atomic_cas_32,_atomic_cas_32) ALIAS(atomic_cas_64,_atomic_cas_64) ALIAS(atomic_cas_uint,_atomic_cas_32) ALIAS(atomic_cas_ulong,_atomic_cas_64) ALIAS(atomic_cas_ptr,_atomic_cas_64) ALIAS(atomic_cas_32_ni,_atomic_cas_32_ni) ALIAS(atomic_cas_64_ni,_atomic_cas_64_ni) ALIAS(atomic_cas_uint_ni,_atomic_cas_32_ni) ALIAS(atomic_cas_ulong_ni,_atomic_cas_64_ni) ALIAS(atomic_cas_ptr_ni,_atomic_cas_64_ni) ALIAS(membar_consumer,_membar_consumer) ALIAS(membar_producer,_membar_producer) ALIAS(membar_enter,_membar_consumer) ALIAS(membar_exit,_membar_producer) ALIAS(membar_sync,_membar_sync) STRONG_ALIAS(_atomic_add_int,_atomic_add_32) STRONG_ALIAS(_atomic_add_long,_atomic_add_64) STRONG_ALIAS(_atomic_add_ptr,_atomic_add_64) STRONG_ALIAS(_atomic_add_int_nv,_atomic_add_32_nv) STRONG_ALIAS(_atomic_add_long_nv,_atomic_add_64_nv) STRONG_ALIAS(_atomic_add_ptr_nv,_atomic_add_64_nv) STRONG_ALIAS(_atomic_and_uint,_atomic_and_32) STRONG_ALIAS(_atomic_and_ulong,_atomic_and_64) STRONG_ALIAS(_atomic_and_ptr,_atomic_and_64) STRONG_ALIAS(_atomic_and_uint_nv,_atomic_and_32_nv) STRONG_ALIAS(_atomic_and_ulong_nv,_atomic_and_64_nv) STRONG_ALIAS(_atomic_and_ptr_nv,_atomic_and_64_nv) STRONG_ALIAS(_atomic_dec_uint,_atomic_dec_32) STRONG_ALIAS(_atomic_dec_ulong,_atomic_dec_64) STRONG_ALIAS(_atomic_dec_ptr,_atomic_dec_64) STRONG_ALIAS(_atomic_dec_uint_nv,_atomic_dec_32_nv) STRONG_ALIAS(_atomic_dec_ulong_nv,_atomic_dec_64_nv) STRONG_ALIAS(_atomic_dec_ptr_nv,_atomic_dec_64_nv) STRONG_ALIAS(_atomic_inc_uint,_atomic_inc_32) STRONG_ALIAS(_atomic_inc_ulong,_atomic_inc_64) STRONG_ALIAS(_atomic_inc_ptr,_atomic_inc_64) STRONG_ALIAS(_atomic_inc_uint_nv,_atomic_inc_32_nv) STRONG_ALIAS(_atomic_inc_ulong_nv,_atomic_inc_64_nv) STRONG_ALIAS(_atomic_inc_ptr_nv,_atomic_inc_64_nv) STRONG_ALIAS(_atomic_or_uint,_atomic_or_32) STRONG_ALIAS(_atomic_or_ulong,_atomic_or_64) STRONG_ALIAS(_atomic_or_ptr,_atomic_or_64) STRONG_ALIAS(_atomic_or_uint_nv,_atomic_or_32_nv) STRONG_ALIAS(_atomic_or_ulong_nv,_atomic_or_64_nv) STRONG_ALIAS(_atomic_or_ptr_nv,_atomic_or_64_nv) STRONG_ALIAS(_atomic_swap_uint,_atomic_swap_32) STRONG_ALIAS(_atomic_swap_ulong,_atomic_swap_64) STRONG_ALIAS(_atomic_swap_ptr,_atomic_swap_64) STRONG_ALIAS(_atomic_cas_uint,_atomic_cas_32) STRONG_ALIAS(_atomic_cas_ulong,_atomic_cas_64) STRONG_ALIAS(_atomic_cas_ptr,_atomic_cas_64) STRONG_ALIAS(_atomic_cas_uint_ni,_atomic_cas_32_ni) STRONG_ALIAS(_atomic_cas_ulong_ni,_atomic_cas_64_ni) STRONG_ALIAS(_atomic_cas_ptr_ni,_atomic_cas_64_ni) STRONG_ALIAS(_membar_enter,_membar_consumer) STRONG_ALIAS(_membar_exit,_membar_producer)