| | 1 | #ifndef _URCU_ARCH_ARM_H |
| | 2 | #define _URCU_ARCH_ARM_H |
| | 3 | |
| | 4 | /* |
| | 5 | * arch_arm.h: trivial definitions for the ARM architecture. |
| | 6 | * |
| | 7 | * Copyright (c) 2010 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 | #include <urcu/syscall-compat.h> |
| | 28 | |
| | 29 | #ifdef __cplusplus |
| | 30 | extern "C" { |
| | 31 | #endif |
| | 32 | |
| | 33 | /* |
| | 34 | * Using DMB is faster than the builtin __sync_synchronize and this instruction is |
| | 35 | * part of the baseline ARMv7 ISA. |
| | 36 | */ |
| | 37 | #ifdef URCU_ARCH_ARMV7 |
| | 38 | |
| | 39 | /* For backwards compat. */ |
| | 40 | #define CONFIG_RCU_ARM_HAVE_DMB 1 |
| | 41 | |
| | 42 | /* |
| | 43 | * Issues full system DMB operation. |
| | 44 | */ |
| | 45 | #define cmm_mb() __asm__ __volatile__ ("dmb sy":::"memory") |
| | 46 | #define cmm_rmb() __asm__ __volatile__ ("dmb sy":::"memory") |
| | 47 | #define cmm_wmb() __asm__ __volatile__ ("dmb sy":::"memory") |
| | 48 | |
| | 49 | /* |
| | 50 | * Issues DMB operation only to the inner shareable domain. |
| | 51 | */ |
| | 52 | #define cmm_smp_mb() __asm__ __volatile__ ("dmb ish":::"memory") |
| | 53 | #define cmm_smp_rmb() __asm__ __volatile__ ("dmb ish":::"memory") |
| | 54 | #define cmm_smp_wmb() __asm__ __volatile__ ("dmb ish":::"memory") |
| | 55 | |
| | 56 | #endif /* URCU_ARCH_ARMV7 */ |
| | 57 | |
| | 58 | #include <stdlib.h> |
| | 59 | #include <sys/time.h> |
| | 60 | |
| | 61 | /* |
| | 62 | * On Linux, define the membarrier system call number if not yet available in |
| | 63 | * the system headers. |
| | 64 | */ |
| | 65 | #if (defined(__linux__) && !defined(__NR_membarrier)) |
| | 66 | #define __NR_membarrier 389 |
| | 67 | #endif |
| | 68 | |
| | 69 | /* |
| | 70 | * Error out for compilers with known bugs. |
| | 71 | */ |
| | 72 | |
| | 73 | /* |
| | 74 | * http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58854 |
| | 75 | */ |
| | 76 | #ifdef URCU_GCC_VERSION |
| | 77 | # if URCU_GCC_VERSION >= 40800 && URCU_GCC_VERSION <= 40802 |
| | 78 | # error Your gcc version produces clobbered frame accesses |
| | 79 | # endif |
| | 80 | #endif |
| | 81 | |
| | 82 | /* |
| | 83 | * https://gcc.gnu.org/bugzilla/show_bug.cgi?id=42263 |
| | 84 | */ |
| | 85 | #ifdef URCU_GCC_VERSION |
| | 86 | # if URCU_GCC_VERSION >= 40400 && URCU_GCC_VERSION <= 40402 |
| | 87 | # error Your gcc version has a non-functional __sync_synchronize() |
| | 88 | # endif |
| | 89 | #endif |
| | 90 | |
| | 91 | #ifdef __cplusplus |
| | 92 | } |
| | 93 | #endif |
| | 94 | |
| | 95 | #include <urcu/arch/generic.h> |
| | 96 | |
| | 97 | #endif /* _URCU_ARCH_ARM_H */ |
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