iodev.h

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    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: releng/11.2/sys/arm64/include/iodev.h 284273 2015-06-11 15:45:33Z andrew $
   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_ */

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FreeBSD/Linux Kernel Cross Reference sys/arm64/include/iodev.h

FreeBSD/Linux Kernel Cross Reference
sys/arm64/include/iodev.h