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/* Copyright (C) 2011-2022 Free Software Foundation, Inc.
Contributed by Richard Henderson <rth@redhat.com>.
This file is part of the GNU Transactional Memory Library (libitm).
Libitm is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
Libitm 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 General Public License for
more details.
Under Section 7 of GPL version 3, you are granted additional
permissions described in the GCC Runtime Library Exception, version
3.1, as published by the Free Software Foundation.
You should have received a copy of the GNU General Public License and
a copy of the GCC Runtime Library Exception along with this program;
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
<http://www.gnu.org/licenses/>. */
namespace GTM HIDDEN {
typedef struct gtm_jmpbuf
{
unsigned long long vfp[8]; /* d8-d15 */
unsigned long long iwmmxt[6]; /* cr10-cr15 */
unsigned long gr[8]; /* r4-r11 */
void *cfa;
unsigned long pc;
} gtm_jmpbuf;
/* ??? The size of one line in hardware caches (in bytes). */
#define HW_CACHELINE_SIZE 64
static inline void
cpu_relax (void)
{
/* ??? The kernel uses the condition
#if __LINUX_ARM_ARCH__ == 6 || defined(CONFIG_ARM_ERRATA_754327)
Given that we're actually just waiting, it doesn't seem like it
hurts to simply use a full barrier all the time. */
__sync_synchronize ();
}
} // namespace GTM
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