Map symbols to allow multiple RCU flavors to be used in one binary
[urcu.git] / urcu / arch_ppc.h
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1#ifndef _URCU_ARCH_PPC_H
2#define _URCU_ARCH_PPC_H
121a5d44 3
6d0ce021 4/*
af02d47e 5 * arch_ppc.h: trivial definitions for the powerpc architecture.
6d0ce021 6 *
af02d47e 7 * Copyright (c) 2009 Paul E. McKenney, IBM Corporation.
6982d6d7 8 * Copyright (c) 2009 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
6d0ce021 9 *
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10 * This library is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU Lesser General Public
12 * License as published by the Free Software Foundation; either
13 * version 2.1 of the License, or (at your option) any later version.
05dd4b94 14 *
af02d47e 15 * This library is distributed in the hope that it will be useful,
6d0ce021 16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * Lesser General Public License for more details.
6d0ce021 19 *
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20 * You should have received a copy of the GNU Lesser General Public
21 * License along with this library; if not, write to the Free Software
22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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23 */
24
ec4e58a3 25#include <urcu/compiler.h>
c96a3726 26#include <urcu/config.h>
121a5d44 27
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28#ifdef __cplusplus
29extern "C" {
30#endif
31
b4e52e3e 32/* Include size of POWER5+ L3 cache lines: 256 bytes */
06f22bdb 33#define CAA_CACHE_LINE_SIZE 256
b4e52e3e 34
5481ddb3 35#define cmm_mb() asm volatile("sync":::"memory")
6d0ce021 36
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37#define mftbl() \
38 ({ \
39 unsigned long rval; \
40 asm volatile("mftbl %0" : "=r" (rval)); \
41 rval; \
42 })
43
44#define mftbu() \
45 ({ \
46 unsigned long rval; \
47 asm volatile("mftbu %0" : "=r" (rval)); \
48 rval; \
49 })
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50
51typedef unsigned long long cycles_t;
52
71bce82c 53static inline cycles_t caa_get_cycles (void)
6d0ce021 54{
af02d47e 55 long h, l;
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56
57 for (;;) {
58 h = mftbu();
5481ddb3 59 cmm_barrier();
6d0ce021 60 l = mftbl();
5481ddb3 61 cmm_barrier();
6d0ce021 62 if (mftbu() == h)
af02d47e 63 return (((cycles_t) h) << 32) + l;
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64 }
65}
121a5d44 66
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67#ifdef __cplusplus
68}
69#endif
70
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71#include <urcu/arch_generic.h>
72
ec4e58a3 73#endif /* _URCU_ARCH_PPC_H */
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