arch/riscv/include/asm/cacheflush.h

   1 /*
   2  * Copyright (C) 2015 Regents of the University of California
   3  *
   4  *   This program is free software; you can redistribute it and/or
   5  *   modify it under the terms of the GNU General Public License
   6  *   as published by the Free Software Foundation, version 2.
   7  *
   8  *   This program is distributed in the hope that it will be useful,
   9  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  *   GNU General Public License for more details.
  12  */
  13
  14 #ifndef _ASM_RISCV_CACHEFLUSH_H
  15 #define _ASM_RISCV_CACHEFLUSH_H
  16
  17 #include <asm-generic/cacheflush.h>
  18
  19 #undef flush_icache_range
  20 #undef flush_icache_user_range
  21
  22 static inline void local_flush_icache_all(void)
  23 {
  24         asm volatile ("fence.i" ::: "memory");
  25 }
  26
  27 #ifndef CONFIG_SMP
  28
  29 #define flush_icache_range(start, end) local_flush_icache_all()
  30 #define flush_icache_user_range(vma, pg, addr, len) local_flush_icache_all()
  31
  32 #else /* CONFIG_SMP */
  33
  34 #define flush_icache_range(start, end) sbi_remote_fence_i(0)
  35 #define flush_icache_user_range(vma, pg, addr, len) sbi_remote_fence_i(0)
  36
  37 #endif /* CONFIG_SMP */
  38
  39 #endif /* _ASM_RISCV_CACHEFLUSH_H */