1 /* $NetBSD: io.h,v 1.6 2020/01/18 02:42:23 jmcneill 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/cdefs.h> 36 #include <sys/systm.h> 37 38 #include <linux/string.h> 39 40 /* 41 * XXX This is bollocks, and is wrong on various architectures (should 42 * work for x86; who knows what else), but bus_space_barrier won't work 43 * because we have no bus space tag or handle or offset or anything. 44 */ 45 #define mmiowb() membar_sync() 46 47 #define memcpy_fromio memcpy 48 #define memcpy_toio memcpy 49 50 #if defined(__NetBSD__) && defined(__aarch64__) 51 static inline void * 52 memset_io(void *b, int c, size_t len) 53 { 54 uint8_t *ptr = b; 55 56 while (len > 0) { 57 *ptr++ = c; 58 len--; 59 } 60 61 return b; 62 } 63 #else 64 #define memset_io memset 65 #endif 66 67 /* XXX wrong place */ 68 #define __force 69 70 #endif /* _ASM_IO_H_ */ 71