xref: /OK3568_Linux_fs/kernel/arch/csky/mm/ioremap.c (revision 4882a59341e53eb6f0b4789bf948001014eff981) 
1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0
2*4882a593Smuzhiyun // Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd.
3*4882a593Smuzhiyun 
4*4882a593Smuzhiyun #include <linux/export.h>
5*4882a593Smuzhiyun #include <linux/mm.h>
6*4882a593Smuzhiyun #include <linux/io.h>
7*4882a593Smuzhiyun 
phys_mem_access_prot(struct file * file,unsigned long pfn,unsigned long size,pgprot_t vma_prot)8*4882a593Smuzhiyun pgprot_t phys_mem_access_prot(struct file *file, unsigned long pfn,
9*4882a593Smuzhiyun 			      unsigned long size, pgprot_t vma_prot)
10*4882a593Smuzhiyun {
11*4882a593Smuzhiyun 	if (!pfn_valid(pfn)) {
12*4882a593Smuzhiyun 		return pgprot_noncached(vma_prot);
13*4882a593Smuzhiyun 	} else if (file->f_flags & O_SYNC) {
14*4882a593Smuzhiyun 		return pgprot_writecombine(vma_prot);
15*4882a593Smuzhiyun 	}
16*4882a593Smuzhiyun 
17*4882a593Smuzhiyun 	return vma_prot;
18*4882a593Smuzhiyun }
19*4882a593Smuzhiyun EXPORT_SYMBOL(phys_mem_access_prot);
20