arch/csky/mm/syscache.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 // Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd.
   3
   4 #include <linux/syscalls.h>
   5 #include <asm/page.h>
   6 #include <asm/cacheflush.h>
   7 #include <asm/cachectl.h>
   8
   9 SYSCALL_DEFINE3(cacheflush,
  10                 void __user *, addr,
  11                 unsigned long, bytes,
  12                 int, cache)
  13 {
  14         switch (cache) {
  15         case BCACHE:
  16         case DCACHE:
  17                 dcache_wb_range((unsigned long)addr,
  18                                 (unsigned long)addr + bytes);
  19                 if (cache != BCACHE)
  20                         break;
  21                 fallthrough;
  22         case ICACHE:
  23                 flush_icache_mm_range(current->mm,
  24                                 (unsigned long)addr,
  25                                 (unsigned long)addr + bytes);
  26                 break;
  27         default:
  28                 return -EINVAL;
  29         }
  30
  31         return 0;
  32 }