Index: uspace/lib/c/arch/mips32/meson.build =================================================================== --- uspace/lib/c/arch/mips32/meson.build (revision 25fdb2d4b3c3247fe62c1154a416ce3a91019563) +++ uspace/lib/c/arch/mips32/meson.build (revision 33f14b9c949d7ce98e414c98da83e0a1175c7053) @@ -30,4 +30,5 @@ arch_src += files( + 'src/atomic.c', 'src/entryjmp.S', 'src/thread_entry.S', Index: uspace/lib/c/arch/mips32/src/atomic.c =================================================================== --- uspace/lib/c/arch/mips32/src/atomic.c (revision 33f14b9c949d7ce98e414c98da83e0a1175c7053) +++ uspace/lib/c/arch/mips32/src/atomic.c (revision 33f14b9c949d7ce98e414c98da83e0a1175c7053) @@ -0,0 +1,84 @@ +/* + * Copyright (c) 2025 Miroslav Cimerman + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * - Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * - 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. + * - The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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 + +static FIBRIL_MUTEX_INITIALIZE(_atomic_mtx); + +unsigned long long __atomic_load_8(const volatile void *mem0, int model) +{ + const volatile unsigned long long *mem = mem0; + + (void)model; + + unsigned long long ret; + + fibril_mutex_lock(&_atomic_mtx); + ret = *mem; + fibril_mutex_unlock(&_atomic_mtx); + + return ret; +} + +void __atomic_store_8(volatile void *mem0, unsigned long long val, int model) +{ + volatile unsigned long long *mem = mem0; + + (void)model; + + fibril_mutex_lock(&_atomic_mtx); + *mem = val; + fibril_mutex_unlock(&_atomic_mtx); +} + +bool __atomic_compare_exchange_1(volatile void *mem0, void *expected0, + unsigned char desired, bool weak, int success, int failure) +{ + volatile unsigned char *mem = mem0; + unsigned char *expected = expected0; + unsigned char ov = *expected; + + (void)success; + (void)failure; + (void)weak; + + fibril_mutex_lock(&_atomic_mtx); + + unsigned char ret = *mem; + + if (ret == ov) { + *mem = desired; + fibril_mutex_unlock(&_atomic_mtx); + return true; + } + + *expected = ret; + fibril_mutex_unlock(&_atomic_mtx); + return false; +} Index: uspace/lib/c/arch/ppc32/meson.build =================================================================== --- uspace/lib/c/arch/ppc32/meson.build (revision 25fdb2d4b3c3247fe62c1154a416ce3a91019563) +++ uspace/lib/c/arch/ppc32/meson.build (revision 33f14b9c949d7ce98e414c98da83e0a1175c7053) @@ -30,4 +30,5 @@ arch_src += files( + 'src/atomic.c', 'src/entryjmp.S', 'src/thread_entry.S', Index: uspace/lib/c/arch/ppc32/src/atomic.c =================================================================== --- uspace/lib/c/arch/ppc32/src/atomic.c (revision 33f14b9c949d7ce98e414c98da83e0a1175c7053) +++ uspace/lib/c/arch/ppc32/src/atomic.c (revision 33f14b9c949d7ce98e414c98da83e0a1175c7053) @@ -0,0 +1,84 @@ +/* + * Copyright (c) 2025 Miroslav Cimerman + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * - Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * - 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. + * - The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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 + +static FIBRIL_MUTEX_INITIALIZE(_atomic_mtx); + +unsigned long long __atomic_load_8(const volatile void *mem0, int model) +{ + const volatile unsigned long long *mem = mem0; + + (void)model; + + unsigned long long ret; + + fibril_mutex_lock(&_atomic_mtx); + ret = *mem; + fibril_mutex_unlock(&_atomic_mtx); + + return ret; +} + +void __atomic_store_8(volatile void *mem0, unsigned long long val, int model) +{ + volatile unsigned long long *mem = mem0; + + (void)model; + + fibril_mutex_lock(&_atomic_mtx); + *mem = val; + fibril_mutex_unlock(&_atomic_mtx); +} + +bool __atomic_compare_exchange_1(volatile void *mem0, void *expected0, + unsigned char desired, bool weak, int success, int failure) +{ + volatile unsigned char *mem = mem0; + unsigned char *expected = expected0; + unsigned char ov = *expected; + + (void)success; + (void)failure; + (void)weak; + + fibril_mutex_lock(&_atomic_mtx); + + unsigned char ret = *mem; + + if (ret == ov) { + *mem = desired; + fibril_mutex_unlock(&_atomic_mtx); + return true; + } + + *expected = ret; + fibril_mutex_unlock(&_atomic_mtx); + return false; +}