1 /* $NetBSD: io.h,v 1.2 2014/03/18 18:20:42 riastradh Exp $ */ 2 3 /*- 4 * Copyright (c) 2013 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_IO_H_ 33 #define _ASM_IO_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 This is bollocks, and is wrong on various architectures (should 43 * work for x86; who knows what else), but bus_space_barrier won't work 44 * because we have no bus space tag or handle or offset or anything. 45 */ 46 #define mmiowb() __insn_barrier() 47 48 #define memcpy_fromio memcpy 49 #define memcpy_toio memcpy 50 #define memset_io memset 51 52 /* 53 * XXX Not sure why this is here, but so it is in Linux... Also, not 54 * sure what the right type is: Linux uses dma_addr_t, but I don't 55 * think bus_addr_t is right here -- paddr_t sounds more appropriate. 56 */ 57 58 static inline bus_addr_t 59 page_to_phys(struct page *page) 60 { 61 return VM_PAGE_TO_PHYS(&page->p_vmp); 62 } 63 64 #endif /* _ASM_IO_H_ */ 65