io.h revision 1.7
1 1.7 riastrad /* $NetBSD: io.h,v 1.7 2021/12/19 10:48:29 riastradh Exp $ */ 2 1.2 riastrad 3 1.2 riastrad /*- 4 1.2 riastrad * Copyright (c) 2013 The NetBSD Foundation, Inc. 5 1.2 riastrad * All rights reserved. 6 1.2 riastrad * 7 1.2 riastrad * This code is derived from software contributed to The NetBSD Foundation 8 1.2 riastrad * by Taylor R. Campbell. 9 1.2 riastrad * 10 1.2 riastrad * Redistribution and use in source and binary forms, with or without 11 1.2 riastrad * modification, are permitted provided that the following conditions 12 1.2 riastrad * are met: 13 1.2 riastrad * 1. Redistributions of source code must retain the above copyright 14 1.2 riastrad * notice, this list of conditions and the following disclaimer. 15 1.2 riastrad * 2. Redistributions in binary form must reproduce the above copyright 16 1.2 riastrad * notice, this list of conditions and the following disclaimer in the 17 1.2 riastrad * documentation and/or other materials provided with the distribution. 18 1.2 riastrad * 19 1.2 riastrad * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 1.2 riastrad * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 1.2 riastrad * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 1.2 riastrad * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 1.2 riastrad * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 1.2 riastrad * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 1.2 riastrad * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 1.2 riastrad * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 1.2 riastrad * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 1.2 riastrad * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 1.2 riastrad * POSSIBILITY OF SUCH DAMAGE. 30 1.2 riastrad */ 31 1.2 riastrad 32 1.2 riastrad #ifndef _ASM_IO_H_ 33 1.2 riastrad #define _ASM_IO_H_ 34 1.2 riastrad 35 1.3 riastrad #include <sys/cdefs.h> 36 1.3 riastrad #include <sys/systm.h> 37 1.2 riastrad 38 1.4 riastrad #include <linux/string.h> 39 1.4 riastrad 40 1.2 riastrad /* 41 1.2 riastrad * XXX This is bollocks, and is wrong on various architectures (should 42 1.2 riastrad * work for x86; who knows what else), but bus_space_barrier won't work 43 1.2 riastrad * because we have no bus space tag or handle or offset or anything. 44 1.2 riastrad */ 45 1.3 riastrad #define mmiowb() membar_sync() 46 1.2 riastrad 47 1.7 riastrad #define memcpy_fromio(d,s,n) memcpy((d),__UNVOLATILE(s),(n)) 48 1.7 riastrad #define memcpy_toio(d,s,n) memcpy(__UNVOLATILE(d),(s),(n)) 49 1.5 jmcneill 50 1.5 jmcneill #if defined(__NetBSD__) && defined(__aarch64__) 51 1.5 jmcneill static inline void * 52 1.7 riastrad memset_io(volatile void *b, int c, size_t len) 53 1.5 jmcneill { 54 1.7 riastrad volatile uint8_t *ptr = b; 55 1.6 jmcneill 56 1.6 jmcneill while (len > 0) { 57 1.5 jmcneill *ptr++ = c; 58 1.6 jmcneill len--; 59 1.5 jmcneill } 60 1.6 jmcneill 61 1.5 jmcneill return b; 62 1.5 jmcneill } 63 1.5 jmcneill #else 64 1.7 riastrad #define memset_io(b,c,n) memset(__UNVOLATILE(b),(c),(n)) 65 1.5 jmcneill #endif 66 1.2 riastrad 67 1.3 riastrad /* XXX wrong place */ 68 1.3 riastrad #define __force 69 1.2 riastrad 70 1.2 riastrad #endif /* _ASM_IO_H_ */ 71
Indexes created Sun Sep 21 16:09:51 GMT 2025