1 /* $OpenBSD: highmem.h,v 1.4 2021/07/28 13:28:05 kettenis Exp $ */
2 /*
3 * Copyright (c) 2013, 2014, 2015 Mark Kettenis
4 *
5 * Permission to use, copy, modify, and distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16 */
17
18 #ifndef _LINUX_HIGHMEM_H
19 #define _LINUX_HIGHMEM_H
20
21 #include <sys/param.h>
22 #include <uvm/uvm_extern.h>
23 #include <linux/uaccess.h>
24 #include <asm/pgtable.h>
25
26 void *kmap(struct vm_page *);
27 void kunmap_va(void *addr);
28
29 #define kmap_to_page(ptr) (ptr)
30
31 void *kmap_atomic_prot(struct vm_page *, pgprot_t);
32 void kunmap_atomic(void *);
33
34 static inline void *
kmap_atomic(struct vm_page * pg)35 kmap_atomic(struct vm_page *pg)
36 {
37 return kmap_atomic_prot(pg, PAGE_KERNEL);
38 }
39
40 #endif
41