| 1 | #ifndef _URCU_ARCH_PPC_H |
| 2 | #define _URCU_ARCH_PPC_H |
| 3 | |
| 4 | /* |
| 5 | * arch_ppc.h: trivial definitions for the powerpc architecture. |
| 6 | * |
| 7 | * Copyright (c) 2009 Paul E. McKenney, IBM Corporation. |
| 8 | * Copyright (c) 2009 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
| 9 | * |
| 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. |
| 14 | * |
| 15 | * This library is distributed in the hope that it will be useful, |
| 16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 18 | * Lesser General Public License for more details. |
| 19 | * |
| 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 |
| 23 | */ |
| 24 | |
| 25 | #include <urcu/compiler.h> |
| 26 | #include <urcu/config.h> |
| 27 | |
| 28 | #ifdef __cplusplus |
| 29 | extern "C" { |
| 30 | #endif |
| 31 | |
| 32 | /* Include size of POWER5+ L3 cache lines: 256 bytes */ |
| 33 | #define CAA_CACHE_LINE_SIZE 256 |
| 34 | |
| 35 | #define cmm_mb() asm volatile("sync":::"memory") |
| 36 | |
| 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 | }) |
| 50 | |
| 51 | #define mftb() \ |
| 52 | ({ \ |
| 53 | unsigned long long rval; \ |
| 54 | asm volatile("mftb %0" : "=r" (rval)); \ |
| 55 | rval; \ |
| 56 | }) |
| 57 | |
| 58 | typedef unsigned long long cycles_t; |
| 59 | |
| 60 | #ifdef __powerpc64__ |
| 61 | static inline cycles_t caa_get_cycles(void) |
| 62 | { |
| 63 | return (cycles_t) mftb(); |
| 64 | } |
| 65 | #else |
| 66 | static inline cycles_t caa_get_cycles(void) |
| 67 | { |
| 68 | unsigned long h, l; |
| 69 | |
| 70 | for (;;) { |
| 71 | h = mftbu(); |
| 72 | cmm_barrier(); |
| 73 | l = mftbl(); |
| 74 | cmm_barrier(); |
| 75 | if (mftbu() == h) |
| 76 | return (((cycles_t) h) << 32) + l; |
| 77 | } |
| 78 | } |
| 79 | #endif |
| 80 | |
| 81 | #ifdef __cplusplus |
| 82 | } |
| 83 | #endif |
| 84 | |
| 85 | #include <urcu/arch/generic.h> |
| 86 | |
| 87 | #endif /* _URCU_ARCH_PPC_H */ |