From patchwork Fri Mar 6 18:24:08 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vineet Gupta X-Patchwork-Id: 38460 Received: (qmail 5678 invoked by alias); 6 Mar 2020 18:29:42 -0000 Mailing-List: contact libc-alpha-help@sourceware.org; run by ezmlm Precedence: bulk List-Id: List-Unsubscribe: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: libc-alpha-owner@sourceware.org Delivered-To: mailing list libc-alpha@sourceware.org Received: (qmail 5659 invoked by uid 89); 6 Mar 2020 18:29:41 -0000 Authentication-Results: sourceware.org; auth=none X-Spam-SWARE-Status: No, score=-21.4 required=5.0 tests=AWL, BAYES_00, GIT_PATCH_0, GIT_PATCH_1, GIT_PATCH_2, GIT_PATCH_3, KAM_SHORT, SPF_PASS autolearn=ham version=3.3.1 spammy= X-HELO: smtprelay-out1.synopsys.com DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=synopsys.com; s=mail; t=1583519068; bh=XzFb4IuvvCGoe9eR97CdUcms/QcI3Ijj19X3a+vZnB8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Ih5bXShfw/Vvq5Om4LgzcfTYs2EysVtPS598gy/vcnRxBnAJSs2gWRP0DaymxuRtD +0q7N6s7eUF/RxcECQFLkQd+kTqKZRBJqFFQ5X+eu4G/4beGp+ZOCVr0IqS+7/7VSw PLS7rpGj5qS/tdy+zCxL/ES0xHrnm06n3N6XuSFzfGSk1xhKEdFqgItnztYqP5sWK0 RTf2J9gK9gv8EkCsGXNLsbrxCL3HD3TEgDmo6TFv7lCfVWjrAtPt+mKc1y/3Dxupz4 S9CFEKjCVXQ+wo/FSH2XXAreYs441gd3A09R7A7+qQQ2RsG+FCTo9w3pL2kLySjo4X ANosFhIi7NJCA== From: Vineet Gupta To: libc-alpha@sourceware.org Cc: linux-snps-arc@lists.infradead.org, Vineet Gupta Subject: [PATCH v3 06/17] ARC: Atomics and Locking primitives Date: Fri, 6 Mar 2020 10:24:08 -0800 Message-Id: <20200306182419.13945-7-vgupta@synopsys.com> In-Reply-To: <20200306182419.13945-1-vgupta@synopsys.com> References: <20200306182419.13945-1-vgupta@synopsys.com> MIME-Version: 1.0 Signed-off-by: Vineet Gupta --- sysdeps/arc/atomic-machine.h | 73 +++++++++++++++++++++++++++++++ sysdeps/arc/nptl/bits/semaphore.h | 32 ++++++++++++++ 2 files changed, 105 insertions(+) create mode 100644 sysdeps/arc/atomic-machine.h create mode 100644 sysdeps/arc/nptl/bits/semaphore.h diff --git a/sysdeps/arc/atomic-machine.h b/sysdeps/arc/atomic-machine.h new file mode 100644 index 000000000000..ae16c607dcc4 --- /dev/null +++ b/sysdeps/arc/atomic-machine.h @@ -0,0 +1,73 @@ +/* Low-level functions for atomic operations. ARC version. + Copyright (C) 2012-2020 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library. If not, see + . */ + +#ifndef _ARC_BITS_ATOMIC_H +#define _ARC_BITS_ATOMIC_H 1 + +#include + +typedef int32_t atomic32_t; +typedef uint32_t uatomic32_t; +typedef int_fast32_t atomic_fast32_t; +typedef uint_fast32_t uatomic_fast32_t; + +typedef intptr_t atomicptr_t; +typedef uintptr_t uatomicptr_t; +typedef intmax_t atomic_max_t; +typedef uintmax_t uatomic_max_t; + +#define __HAVE_64B_ATOMICS 0 +#define USE_ATOMIC_COMPILER_BUILTINS 1 + +/* ARC does have legacy atomic EX reg, [mem] instruction but the micro-arch + is not as optimal as LLOCK/SCOND specially for SMP. */ +#define ATOMIC_EXCHANGE_USES_CAS 1 + +#define __arch_compare_and_exchange_bool_8_acq(mem, newval, oldval) \ + (abort (), 0) +#define __arch_compare_and_exchange_bool_16_acq(mem, newval, oldval) \ + (abort (), 0) +#define __arch_compare_and_exchange_bool_64_acq(mem, newval, oldval) \ + (abort (), 0) + +#define __arch_compare_and_exchange_val_8_int(mem, newval, oldval, model) \ + (abort (), (__typeof (*mem)) 0) +#define __arch_compare_and_exchange_val_16_int(mem, newval, oldval, model) \ + (abort (), (__typeof (*mem)) 0) +#define __arch_compare_and_exchange_val_64_int(mem, newval, oldval, model) \ + (abort (), (__typeof (*mem)) 0) + +#define __arch_compare_and_exchange_val_32_int(mem, newval, oldval, model) \ + ({ \ + typeof (*mem) __oldval = (oldval); \ + __atomic_compare_exchange_n (mem, (void *) &__oldval, newval, 0, \ + model, __ATOMIC_RELAXED); \ + __oldval; \ + }) + +#define atomic_compare_and_exchange_val_acq(mem, new, old) \ + __atomic_val_bysize (__arch_compare_and_exchange_val, int, \ + mem, new, old, __ATOMIC_ACQUIRE) + +#ifdef __ARC700__ +#define atomic_full_barrier() ({ asm volatile ("sync":::"memory"); }) +#else +#define atomic_full_barrier() ({ asm volatile ("dmb 3":::"memory"); }) +#endif + +#endif /* _ARC_BITS_ATOMIC_H */ diff --git a/sysdeps/arc/nptl/bits/semaphore.h b/sysdeps/arc/nptl/bits/semaphore.h new file mode 100644 index 000000000000..772dc4cb9b01 --- /dev/null +++ b/sysdeps/arc/nptl/bits/semaphore.h @@ -0,0 +1,32 @@ +/* Machine-specific POSIX semaphore type layouts. ARC version. + Copyright (C) 2002-2020 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + . */ + +#ifndef _SEMAPHORE_H +# error "Never use directly; include instead." +#endif + +#define __SIZEOF_SEM_T 16 + +/* Value returned if `sem_open' failed. */ +#define SEM_FAILED ((sem_t *) 0) + +typedef union +{ + char __size[__SIZEOF_SEM_T]; + long int __align; +} sem_t;