From: Vineet Gupta <Vineet.Gupta1@synopsys.com>
To: libc-alpha@sourceware.org
Cc: Vineet Gupta <Vineet.Gupta1@synopsys.com>,
linux-snps-arc@lists.infradead.org
Subject: [PATCH v6 04/13] ARC: Atomics and Locking primitives
Date: Wed, 22 Apr 2020 18:41:17 -0700 [thread overview]
Message-ID: <20200423014126.10417-5-vgupta@synopsys.com> (raw)
In-Reply-To: <20200423014126.10417-1-vgupta@synopsys.com>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
---
sysdeps/arc/atomic-machine.h | 69 +++++++++++++++++++++++++++++++
sysdeps/arc/nptl/bits/semaphore.h | 32 ++++++++++++++
2 files changed, 101 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..6cf128dc7fa8
--- /dev/null
+++ b/sysdeps/arc/atomic-machine.h
@@ -0,0 +1,69 @@
+/* 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
+ <https://www.gnu.org/licenses/>. */
+
+#ifndef _ARC_BITS_ATOMIC_H
+#define _ARC_BITS_ATOMIC_H 1
+
+#include <stdint.h>
+
+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)
+
+#define atomic_full_barrier() ({ asm volatile ("dmb 3":::"memory"); })
+
+#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
+ <https://www.gnu.org/licenses/>. */
+
+#ifndef _SEMAPHORE_H
+# error "Never use <bits/semaphore.h> directly; include <semaphore.h> 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;
--
2.20.1
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next prev parent reply other threads:[~2020-04-23 1:41 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-23 1:41 [PATCH v6 00/13] glibc port to ARC processors Vineet Gupta
2020-04-23 1:41 ` [PATCH v6 01/13] ARC: ABI Implementation Vineet Gupta
[not found] ` <88508d10-2d29-026a-bb54-ad607154ab87@linaro.org>
2020-05-27 22:15 ` Vineet Gupta
2020-05-29 13:56 ` Adhemerval Zanella
[not found] ` <a56a35d4-3e9e-9a88-4be5-8553d5f11ad3@synopsys.com>
[not found] ` <87mu5jxkv7.fsf@oldenburg2.str.redhat.com>
2020-06-04 19:01 ` Vineet Gupta
2020-06-04 23:56 ` Vineet Gupta
2020-04-23 1:41 ` [PATCH v6 02/13] ARC: startup and dynamic linking code Vineet Gupta
[not found] ` <17957ee6-2bc1-f43b-f184-f0703ba2765f@linaro.org>
2020-05-28 1:14 ` Vineet Gupta
2020-04-23 1:41 ` [PATCH v6 03/13] ARC: Thread Local Storage support Vineet Gupta
[not found] ` <4f7a67fb-6f96-57e6-b827-d1ab5dd6733f@linaro.org>
2020-05-28 1:36 ` Vineet Gupta
2020-06-01 18:53 ` Adhemerval Zanella
2020-04-23 1:41 ` Vineet Gupta [this message]
[not found] ` <03f4a9b3-b1ca-90fa-0b6a-609a3135267d@linaro.org>
2020-04-24 7:23 ` [PATCH v6 04/13] ARC: Atomics and Locking primitives Vineet Gupta
[not found] ` <20200427215938.14136-1-vgupta@synopsys.com>
2020-04-27 22:13 ` [PATCH] semaphore: consolidate arch headers into a generic one Vineet Gupta
[not found] ` <ac93c301-36d3-b20a-d31c-50c1f3264c68@linaro.org>
2020-05-05 22:59 ` Vineet Gupta
2020-05-08 13:32 ` Adhemerval Zanella
2020-04-23 1:41 ` [PATCH v6 05/13] ARC: math soft float support Vineet Gupta
2020-04-23 1:41 ` [PATCH v6 06/13] ARC: hardware floating point support Vineet Gupta
2020-05-29 14:12 ` Adhemerval Zanella
2020-05-29 22:28 ` Vineet Gupta
2020-05-29 23:50 ` Vineet Gupta
2020-06-02 17:51 ` Joseph Myers
[not found] ` <07887c48-7e07-9f89-035d-3f336a16f2da@synopsys.com>
2020-06-02 18:13 ` static inline math functions (was Re: [PATCH v6 06/13] ARC: hardware floating point support) Joseph Myers
2020-06-02 18:35 ` Adhemerval Zanella
2020-06-05 4:44 ` [PATCH v6 06/13] ARC: hardware floating point support Vineet Gupta
2020-06-05 17:22 ` Adhemerval Zanella
2020-06-02 17:48 ` Joseph Myers
2020-04-23 1:41 ` [PATCH v6 07/13] ARC: Linux Syscall Interface Vineet Gupta
2020-05-29 16:49 ` Adhemerval Zanella
2020-05-30 2:02 ` Vineet Gupta
2020-06-03 19:46 ` Vineet Gupta
2020-06-03 20:04 ` Adhemerval Zanella
2020-06-03 20:17 ` Vineet Gupta
2020-06-04 11:06 ` Adhemerval Zanella
2020-04-23 1:41 ` [PATCH v6 08/13] ARC: Linux ABI Vineet Gupta
2020-04-23 1:41 ` [PATCH v6 09/13] ARC: Linux Startup and Dynamic Loading Vineet Gupta
2020-04-23 1:41 ` [PATCH v6 10/13] ARC: ABI lists Vineet Gupta
2020-04-23 1:41 ` [PATCH v6 11/13] ARC: Build Infrastructure Vineet Gupta
2020-06-03 19:58 ` Adhemerval Zanella
2020-06-04 15:25 ` Vineet Gupta
2020-06-04 17:05 ` Adhemerval Zanella
2020-06-08 4:18 ` Vineet Gupta
2020-04-23 1:41 ` [PATCH v6 12/13] build-many-glibcs.py: Enable ARC builds Vineet Gupta
2020-04-23 1:41 ` [PATCH v6 13/13] Documentation for ARC port Vineet Gupta
2020-05-04 21:21 ` [PATCH v6 00/13] glibc port to ARC processors Vineet Gupta
2020-05-15 0:45 ` Vineet Gupta
2020-05-27 1:49 ` Vineet Gupta
[not found] ` <d7f1176c-87c6-90c6-161c-4705a47837ea@linaro.org>
2020-05-27 18:38 ` Vineet Gupta
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