| /* |
| * This file is subject to the terms and conditions of the GNU General Public |
| * License. See the file "COPYING" in the main directory of this archive |
| * for more details. |
| * |
| * Copyright (C) 2001 - 2012 Tensilica Inc. |
| */ |
| |
| #ifndef _XTENSA_SYSTEM_H |
| #define _XTENSA_SYSTEM_H |
| |
| #define smp_read_barrier_depends() do { } while(0) |
| #define read_barrier_depends() do { } while(0) |
| |
| #define mb() ({ __asm__ __volatile__("memw" : : : "memory"); }) |
| #define rmb() barrier() |
| #define wmb() mb() |
| |
| #ifdef CONFIG_SMP |
| #error smp_* not defined |
| #else |
| #define smp_mb() barrier() |
| #define smp_rmb() barrier() |
| #define smp_wmb() barrier() |
| #endif |
| |
| #define set_mb(var, value) do { var = value; mb(); } while (0) |
| |
| #endif /* _XTENSA_SYSTEM_H */ |
