arch/riscv/include/asm/fence.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 #ifndef _ASM_RISCV_FENCE_H
   3 #define _ASM_RISCV_FENCE_H
   4
   5 #define RISCV_FENCE_ASM(p, s)           "\tfence " #p "," #s "\n"
   6 #define RISCV_FENCE(p, s) \
   7         ({ __asm__ __volatile__ (RISCV_FENCE_ASM(p, s) : : : "memory"); })
   8
   9 #ifdef CONFIG_SMP
  10 #define RISCV_ACQUIRE_BARRIER           RISCV_FENCE_ASM(r, rw)
  11 #define RISCV_RELEASE_BARRIER           RISCV_FENCE_ASM(rw, w)
  12 #define RISCV_FULL_BARRIER              RISCV_FENCE_ASM(rw, rw)
  13 #else
  14 #define RISCV_ACQUIRE_BARRIER
  15 #define RISCV_RELEASE_BARRIER
  16 #define RISCV_FULL_BARRIER
  17 #endif
  18
  19 #endif  /* _ASM_RISCV_FENCE_H */