s390: allocate membarrier system call number
[urcu.git] / urcu / arch / s390.h
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1#ifndef _URCU_ARCH_S390_H
2#define _URCU_ARCH_S390_H
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3
4/*
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5 * Trivial definitions for the S390 architecture based on information from the
6 * Principles of Operation "CPU Serialization" (5-91), "BRANCH ON CONDITION"
7 * (7-25) and "STORE CLOCK" (7-169).
ac26f1a8 8 *
7039fa6f 9 * Copyright (c) 2009 Novell, Inc.
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10 * Author: Jan Blunck <jblunck@suse.de>
11 *
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12 * Permission is hereby granted, free of charge, to any person obtaining a copy
13 * of this software and associated documentation files (the "Software"), to
14 * deal in the Software without restriction, including without limitation the
15 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
16 * sell copies of the Software, and to permit persons to whom the Software is
17 * furnished to do so, subject to the following conditions:
ac26f1a8 18 *
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19 * The above copyright notice and this permission notice shall be included in
20 * all copies or substantial portions of the Software.
ac26f1a8 21 *
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22 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
23 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
24 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
25 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
26 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
27 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
28 * IN THE SOFTWARE.
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29 */
30
14714b51 31#include <urcu/compiler.h>
1655f018 32#include <urcu/config.h>
999991c6 33#include <urcu/syscall-compat.h>
ac26f1a8 34
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35#ifdef __cplusplus
36extern "C" {
37#endif
38
06f22bdb 39#define CAA_CACHE_LINE_SIZE 128
5b3c6672 40
5481ddb3 41#define cmm_mb() __asm__ __volatile__("bcr 15,0" : : : "memory")
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42
43typedef unsigned long long cycles_t;
44
71bce82c 45static inline cycles_t caa_get_cycles (void)
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46{
47 cycles_t cycles;
48
49 __asm__ __volatile__("stck %0" : "=m" (cycles) : : "cc", "memory" );
50
51 return cycles;
52}
53
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54/*
55 * Define the membarrier system call number if not yet available in the
56 * system headers.
57 */
58#ifndef __NR_membarrier
59#define __NR_membarrier 356
60#endif
61
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62#ifdef __cplusplus
63}
64#endif
65
1b9119f8 66#include <urcu/arch/generic.h>
e4d1eb09 67
2041a99a 68#endif /* _URCU_ARCH_S390_H */
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