xref: /openbsd/sys/dev/pci/drm/include/linux/highmem.h (revision 49a189d2)
1*49a189d2Skettenis /*	$OpenBSD: highmem.h,v 1.4 2021/07/28 13:28:05 kettenis Exp $	*/
27f4dd379Sjsg /*
37f4dd379Sjsg  * Copyright (c) 2013, 2014, 2015 Mark Kettenis
47f4dd379Sjsg  *
57f4dd379Sjsg  * Permission to use, copy, modify, and distribute this software for any
67f4dd379Sjsg  * purpose with or without fee is hereby granted, provided that the above
77f4dd379Sjsg  * copyright notice and this permission notice appear in all copies.
87f4dd379Sjsg  *
97f4dd379Sjsg  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
107f4dd379Sjsg  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
117f4dd379Sjsg  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
127f4dd379Sjsg  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
137f4dd379Sjsg  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
147f4dd379Sjsg  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
157f4dd379Sjsg  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
167f4dd379Sjsg  */
177f4dd379Sjsg 
187f4dd379Sjsg #ifndef _LINUX_HIGHMEM_H
197f4dd379Sjsg #define _LINUX_HIGHMEM_H
207f4dd379Sjsg 
21c349dbc7Sjsg #include <sys/param.h>
227f4dd379Sjsg #include <uvm/uvm_extern.h>
237f4dd379Sjsg #include <linux/uaccess.h>
24*49a189d2Skettenis #include <asm/pgtable.h>
257f4dd379Sjsg 
267f4dd379Sjsg void	*kmap(struct vm_page *);
276942ea66Sjsg void	kunmap_va(void *addr);
287f4dd379Sjsg 
297f4dd379Sjsg #define kmap_to_page(ptr)	(ptr)
307f4dd379Sjsg 
31*49a189d2Skettenis void	*kmap_atomic_prot(struct vm_page *, pgprot_t);
32*49a189d2Skettenis void	kunmap_atomic(void *);
337f4dd379Sjsg 
347f4dd379Sjsg static inline void *
kmap_atomic(struct vm_page * pg)357f4dd379Sjsg kmap_atomic(struct vm_page *pg)
367f4dd379Sjsg {
37*49a189d2Skettenis 	return kmap_atomic_prot(pg, PAGE_KERNEL);
387f4dd379Sjsg }
397f4dd379Sjsg 
407f4dd379Sjsg #endif
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