1*617994efSAndrew Turner /*- 2*617994efSAndrew Turner * Copyright (c) 2015 The FreeBSD Foundation 3*617994efSAndrew Turner * 4*617994efSAndrew Turner * This software was developed by Andrew Turner under 5*617994efSAndrew Turner * sponsorship from the FreeBSD Foundation. 6*617994efSAndrew Turner * 7*617994efSAndrew Turner * Redistribution and use in source and binary forms, with or without 8*617994efSAndrew Turner * modification, are permitted provided that the following conditions 9*617994efSAndrew Turner * are met: 10*617994efSAndrew Turner * 1. Redistributions of source code must retain the above copyright 11*617994efSAndrew Turner * notice, this list of conditions and the following disclaimer. 12*617994efSAndrew Turner * 2. Redistributions in binary form must reproduce the above copyright 13*617994efSAndrew Turner * notice, this list of conditions and the following disclaimer in the 14*617994efSAndrew Turner * documentation and/or other materials provided with the distribution. 15*617994efSAndrew Turner * 16*617994efSAndrew Turner * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17*617994efSAndrew Turner * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18*617994efSAndrew Turner * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19*617994efSAndrew Turner * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20*617994efSAndrew Turner * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21*617994efSAndrew Turner * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22*617994efSAndrew Turner * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23*617994efSAndrew Turner * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24*617994efSAndrew Turner * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25*617994efSAndrew Turner * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26*617994efSAndrew Turner * SUCH DAMAGE. 27*617994efSAndrew Turner */ 28*617994efSAndrew Turner 29*617994efSAndrew Turner #ifndef _MACHINE_IODEV_H_ 30*617994efSAndrew Turner #define _MACHINE_IODEV_H_ 31*617994efSAndrew Turner 32*617994efSAndrew Turner #define iodev_read_1(a) \ 33*617994efSAndrew Turner ({ \ 34*617994efSAndrew Turner uint8_t val; \ 35*617994efSAndrew Turner __asm __volatile("ldrb %w0, [%1]" : "=&r" (val) : "r"(a)); \ 36*617994efSAndrew Turner val; \ 37*617994efSAndrew Turner }) 38*617994efSAndrew Turner 39*617994efSAndrew Turner #define iodev_read_2(a) \ 40*617994efSAndrew Turner ({ \ 41*617994efSAndrew Turner uint16_t val; \ 42*617994efSAndrew Turner __asm __volatile("ldrh %w0, [%1]" : "=&r" (val) : "r"(a)); \ 43*617994efSAndrew Turner val; \ 44*617994efSAndrew Turner }) 45*617994efSAndrew Turner 46*617994efSAndrew Turner #define iodev_read_4(a) \ 47*617994efSAndrew Turner ({ \ 48*617994efSAndrew Turner uint32_t val; \ 49*617994efSAndrew Turner __asm __volatile("ldr %w0, [%1]" : "=&r" (val) : "r"(a)); \ 50*617994efSAndrew Turner val; \ 51*617994efSAndrew Turner }) 52*617994efSAndrew Turner 53*617994efSAndrew Turner #define iodev_write_1(a, v) \ 54*617994efSAndrew Turner __asm __volatile("strb %w0, [%1]" :: "r" (v), "r"(a)) 55*617994efSAndrew Turner 56*617994efSAndrew Turner #define iodev_write_2(a, v) \ 57*617994efSAndrew Turner __asm __volatile("strh %w0, [%1]" :: "r" (v), "r"(a)) 58*617994efSAndrew Turner 59*617994efSAndrew Turner #define iodev_write_4(a, v) \ 60*617994efSAndrew Turner __asm __volatile("str %w0, [%1]" :: "r" (v), "r"(a)) 61*617994efSAndrew Turner 62*617994efSAndrew Turner #endif /* _MACHINE_IODEV_H_ */ 63