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 49 page_to_phys(struct page *page) 50 { 51 return VM_PAGE_TO_PHYS(&page->p_vmp); 52 } 53 54 static inline unsigned long 55 page_to_pfn(struct page *page) 56 { 57 return (page_to_phys(page) >> PAGE_SHIFT); 58 } 59 60 static inline size_t 61 get_order(size_t n) 62 { 63 return fls64((n - 1) >> PAGE_SHIFT); 64 } 65 66 #endif /* _ASM_PAGE_H_ */ 67