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