2 * Copyright (c) 2014-2016 François Tigeot
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice unmodified, this list of conditions, and the following
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 #ifndef _LINUX_HIGHMEM_H_
28 #define _LINUX_HIGHMEM_H_
30 #include <machine/vmparam.h>
32 #include <linux/kernel.h>
33 #include <linux/bug.h>
35 #include <linux/uaccess.h>
37 #include <asm/cacheflush.h>
39 static inline struct vm_page
*
40 kmap_to_page(void *addr
)
42 return PHYS_TO_VM_PAGE(vtophys(addr
));
45 static inline void *kmap(struct vm_page
*pg
)
47 return (void *)PHYS_TO_DMAP(VM_PAGE_TO_PHYS(pg
));
50 static inline void kunmap(struct vm_page
*pg
)
52 /* Nothing to do on systems with a direct memory map */
55 static inline void *kmap_atomic(struct vm_page
*pg
)
57 return (void *)PHYS_TO_DMAP(VM_PAGE_TO_PHYS(pg
));
60 static inline void kunmap_atomic(void *vaddr
)
62 /* Nothing to do on systems with a direct memory map */
65 #endif /* _LINUX_HIGHMEM_H_ */