1 /* $NetBSD: page.h,v 1.2 2014/07/16 20:59:58 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/bus.h> 36 37 #include <uvm/uvm_page.h> 38 39 #include <linux/mm_types.h> 40 41 /* 42 * XXX Not sure why this is here, but so it is in Linux... Also, not 43 * sure what the right type is: Linux uses dma_addr_t, but I don't 44 * think bus_addr_t is right here -- paddr_t sounds more appropriate. 45 */ 46 47 static inline bus_addr_t 48 page_to_phys(struct page *page) 49 { 50 return VM_PAGE_TO_PHYS(&page->p_vmp); 51 } 52 53 static inline unsigned long 54 page_to_pfn(struct page *page) 55 { 56 return (page_to_phys(page) >> PAGE_SHIFT); 57 } 58 59 #endif /* _ASM_PAGE_H_ */ 60