projects / urcu.git / blame
| Commit | Line | Data |
|---|---|---|
| d3d3857f MJ |
1 | // SPDX-FileCopyrightText: 2010 Paul E. McKenney, IBM Corporation. |
| 2 | // SPDX-FileCopyrightText: 2009 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
| 3 | // | |
| 4 | // SPDX-License-Identifier: LGPL-2.1-or-later | |
| 5 | ||
| 6aca0125 JW |
6 | #ifndef _URCU_ARCH_ARM_H |
| 7 | #define _URCU_ARCH_ARM_H | |
| fdbddd0b PM |
8 | |
| 9 | /* | |
| 6aca0125 | 10 | * arch_arm.h: trivial definitions for the ARM architecture. |
| fdbddd0b PM |
11 | */ |
| 12 | ||
| 13 | #include <urcu/compiler.h> | |
| 14 | #include <urcu/config.h> | |
| 999991c6 | 15 | #include <urcu/syscall-compat.h> |
| fdbddd0b PM |
16 | |
| 17 | #ifdef __cplusplus | |
| 18 | extern "C" { | |
| 67ecffc0 | 19 | #endif |
| fdbddd0b | 20 | |
| 9260f372 MJ |
21 | /* |
| 22 | * Using DMB is faster than the builtin __sync_synchronize and this instruction is | |
| 23 | * part of the baseline ARMv7 ISA. | |
| 24 | */ | |
| 25 | #ifdef URCU_ARCH_ARMV7 | |
| 26 | ||
| 27 | /* For backwards compat. */ | |
| 28 | #define CONFIG_RCU_ARM_HAVE_DMB 1 | |
| 29 | ||
| 7fe7e9f3 MD |
30 | /* |
| 31 | * Issues full system DMB operation. | |
| 32 | */ | |
| 33 | #define cmm_mb() __asm__ __volatile__ ("dmb sy":::"memory") | |
| 34 | #define cmm_rmb() __asm__ __volatile__ ("dmb sy":::"memory") | |
| 35 | #define cmm_wmb() __asm__ __volatile__ ("dmb sy":::"memory") | |
| 36 | ||
| 37 | /* | |
| 38 | * Issues DMB operation only to the inner shareable domain. | |
| 39 | */ | |
| 40 | #define cmm_smp_mb() __asm__ __volatile__ ("dmb ish":::"memory") | |
| 41 | #define cmm_smp_rmb() __asm__ __volatile__ ("dmb ish":::"memory") | |
| 42 | #define cmm_smp_wmb() __asm__ __volatile__ ("dmb ish":::"memory") | |
| 9260f372 MJ |
43 | |
| 44 | #endif /* URCU_ARCH_ARMV7 */ | |
| fdbddd0b PM |
45 | |
| 46 | #include <stdlib.h> | |
| 47 | #include <sys/time.h> | |
| 48 | ||
| da5b715a | 49 | /* |
| 84f4ccb4 MD |
50 | * On Linux, define the membarrier system call number if not yet available in |
| 51 | * the system headers. | |
| da5b715a | 52 | */ |
| 84f4ccb4 | 53 | #if (defined(__linux__) && !defined(__NR_membarrier)) |
| da5b715a MD |
54 | #define __NR_membarrier 389 |
| 55 | #endif | |
| 56 | ||
| 3f0dd283 MJ |
57 | /* |
| 58 | * Error out for compilers with known bugs. | |
| 59 | */ | |
| 60 | ||
| 61 | /* | |
| 62 | * http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58854 | |
| 63 | */ | |
| 64 | #ifdef URCU_GCC_VERSION | |
| 65 | # if URCU_GCC_VERSION >= 40800 && URCU_GCC_VERSION <= 40802 | |
| 66 | # error Your gcc version produces clobbered frame accesses | |
| 67 | # endif | |
| 68 | #endif | |
| 69 | ||
| 39c2747c MJ |
70 | /* |
| 71 | * https://gcc.gnu.org/bugzilla/show_bug.cgi?id=42263 | |
| 72 | */ | |
| 73 | #ifdef URCU_GCC_VERSION | |
| 74 | # if URCU_GCC_VERSION >= 40400 && URCU_GCC_VERSION <= 40402 | |
| 75 | # error Your gcc version has a non-functional __sync_synchronize() | |
| 76 | # endif | |
| 77 | #endif | |
| 78 | ||
| 67ecffc0 | 79 | #ifdef __cplusplus |
| fdbddd0b PM |
80 | } |
| 81 | #endif | |
| 82 | ||
| 1b9119f8 | 83 | #include <urcu/arch/generic.h> |
| fdbddd0b | 84 | |
| 6aca0125 | 85 | #endif /* _URCU_ARCH_ARM_H */ |