/*- * Copyright (c) 2015 The FreeBSD Foundation * All rights reserved. * * This software was developed by Andrew Turner under * sponsorship from the FreeBSD Foundation. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * $FreeBSD$ */ #ifndef _MACHINE_IODEV_H_ #define _MACHINE_IODEV_H_ #define iodev_read_1(a) \ ({ \ uint8_t val; \ __asm __volatile("ldrb %w0, [%1]" : "=&r" (val) : "r"(a)); \ val; \ }) #define iodev_read_2(a) \ ({ \ uint16_t val; \ __asm __volatile("ldrh %w0, [%1]" : "=&r" (val) : "r"(a)); \ val; \ }) #define iodev_read_4(a) \ ({ \ uint32_t val; \ __asm __volatile("ldr %w0, [%1]" : "=&r" (val) : "r"(a)); \ val; \ }) #define iodev_write_1(a, v) \ __asm __volatile("strb %w0, [%1]" :: "r" (v), "r"(a)) #define iodev_write_2(a, v) \ __asm __volatile("strh %w0, [%1]" :: "r" (v), "r"(a)) #define iodev_write_4(a, v) \ __asm __volatile("str %w0, [%1]" :: "r" (v), "r"(a)) #endif /* _MACHINE_IODEV_H_ */ |