1 /*- 2 * Copyright (c) 2015 The FreeBSD Foundation 3 * All rights reserved. 4 * 5 * This software was developed by Andrew Turner under 6 * sponsorship from the FreeBSD Foundation. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * $FreeBSD$ 30 */ 31 32 #ifndef _MACHINE_IODEV_H_ 33 #define _MACHINE_IODEV_H_ 34 35 #define iodev_read_1(a) \ 36 ({ \ 37 uint8_t val; \ 38 __asm __volatile("ldrb %w0, [%1]" : "=&r" (val) : "r"(a)); \ 39 val; \ 40 }) 41 42 #define iodev_read_2(a) \ 43 ({ \ 44 uint16_t val; \ 45 __asm __volatile("ldrh %w0, [%1]" : "=&r" (val) : "r"(a)); \ 46 val; \ 47 }) 48 49 #define iodev_read_4(a) \ 50 ({ \ 51 uint32_t val; \ 52 __asm __volatile("ldr %w0, [%1]" : "=&r" (val) : "r"(a)); \ 53 val; \ 54 }) 55 56 #define iodev_write_1(a, v) \ 57 __asm __volatile("strb %w0, [%1]" :: "r" (v), "r"(a)) 58 59 #define iodev_write_2(a, v) \ 60 __asm __volatile("strh %w0, [%1]" :: "r" (v), "r"(a)) 61 62 #define iodev_write_4(a, v) \ 63 __asm __volatile("str %w0, [%1]" :: "r" (v), "r"(a)) 64 65 #endif /* _MACHINE_IODEV_H_ */ 66