arch/csky/mm/ioremap.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 // Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd.
   3
   4 #include <linux/export.h>
   5 #include <linux/mm.h>
   6 #include <linux/io.h>
   7
   8 pgprot_t phys_mem_access_prot(struct file *file, unsigned long pfn,
   9                               unsigned long size, pgprot_t vma_prot)
  10 {
  11         if (!pfn_valid(pfn)) {
  12                 return pgprot_noncached(vma_prot);
  13         } else if (file->f_flags & O_SYNC) {
  14                 return pgprot_writecombine(vma_prot);
  15         }
  16
  17         return vma_prot;
  18 }
  19 EXPORT_SYMBOL(phys_mem_access_prot);