1 /* $NetBSD: page.h,v 1.3 2021/12/19 01:18:45 riastradh Exp $ */
2
3 /*-
4 * Copyright (c) 2014 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Taylor R. Campbell.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32 #ifndef _ASM_PAGE_H_
33 #define _ASM_PAGE_H_
34
35 #include <sys/bitops.h>
36 #include <sys/bus.h>
37
38 #include <uvm/uvm_page.h>
39
40 #include <linux/mm_types.h>
41
42 /*
43 * XXX Not sure why this is here, but so it is in Linux... Also, not
44 * sure what the right type is: Linux uses dma_addr_t, but I don't
45 * think bus_addr_t is right here -- paddr_t sounds more appropriate.
46 */
47
48 static inline bus_addr_t
page_to_phys(struct page * page)49 page_to_phys(struct page *page)
50 {
51 return VM_PAGE_TO_PHYS(&page->p_vmp);
52 }
53
54 static inline unsigned long
page_to_pfn(struct page * page)55 page_to_pfn(struct page *page)
56 {
57 return (page_to_phys(page) >> PAGE_SHIFT);
58 }
59
60 static inline size_t
get_order(size_t n)61 get_order(size_t n)
62 {
63 return fls64((n - 1) >> PAGE_SHIFT);
64 }
65
66 #endif /* _ASM_PAGE_H_ */
67