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