1 /* 2 * Copyright (c) 2014-2015 François Tigeot 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice unmodified, this list of conditions, and the following 10 * disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27 #ifndef _LINUX_IO_H_ 28 #define _LINUX_IO_H_ 29 30 #include <linux/kernel.h> 31 #include <linux/bug.h> 32 #include <asm/io.h> 33 #include <asm/page.h> 34 35 #if defined(writel) 36 #undef writel 37 #endif 38 39 static inline void 40 writel(uint32_t value, volatile void *addr) 41 { 42 *(volatile uint32_t *)addr = value; 43 } 44 45 static inline int 46 arch_phys_wc_add(unsigned long base, unsigned long size) 47 { 48 /* The DragonFly kernel is PAT-enabled, do nothing */ 49 return 0; 50 } 51 52 static inline void 53 arch_phys_wc_del(int handle) 54 { 55 BUG_ON(handle != 0); 56 } 57 58 #endif /* _LINUX_IO_H_ */ 59