arch/nds32/kernel/sys_nds32.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 // Copyright (C) 2005-2017 Andes Technology Corporation
   3
   4 #include <linux/syscalls.h>
   5 #include <linux/uaccess.h>
   6
   7 #include <asm/cachectl.h>
   8 #include <asm/proc-fns.h>
   9
  10 SYSCALL_DEFINE6(mmap2, unsigned long, addr, unsigned long, len,
  11                unsigned long, prot, unsigned long, flags,
  12                unsigned long, fd, unsigned long, pgoff)
  13 {
  14         if (pgoff & (~PAGE_MASK >> 12))
  15                 return -EINVAL;
  16
  17         return sys_mmap_pgoff(addr, len, prot, flags, fd,
  18                               pgoff >> (PAGE_SHIFT - 12));
  19 }
  20
  21 SYSCALL_DEFINE4(fadvise64_64_wrapper,int, fd, int, advice, loff_t, offset,
  22                                          loff_t, len)
  23 {
  24         return sys_fadvise64_64(fd, offset, len, advice);
  25 }
  26
  27 SYSCALL_DEFINE3(cacheflush, unsigned int, start, unsigned int, end, int, cache)
  28 {
  29         struct vm_area_struct *vma;
  30         bool flushi = true, wbd = true;
  31
  32         vma = find_vma(current->mm, start);
  33         if (!vma)
  34                 return -EFAULT;
  35         switch (cache) {
  36         case ICACHE:
  37                 wbd = false;
  38                 break;
  39         case DCACHE:
  40                 flushi = false;
  41                 break;
  42         case BCACHE:
  43                 break;
  44         default:
  45                 return -EINVAL;
  46         }
  47         cpu_cache_wbinval_range_check(vma, start, end, flushi, wbd);
  48
  49         return 0;
  50 }