67 lines
2.5 KiB
C
67 lines
2.5 KiB
C
/*-
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* Copyright (c) 2012 Oleksandr Tymoshenko <gonzo@freebsd.org>
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* All rights reserved.
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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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* $FreeBSD$
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*/
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/*
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* Defines for converting physical address to VideoCore bus address and back
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*/
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#ifndef _BCM2835_VCBUS_H_
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#define _BCM2835_VCBUS_H_
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#define BCM2835_VCBUS_SDRAM_CACHED 0x40000000
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#define BCM2835_VCBUS_IO_BASE 0x7E000000
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#define BCM2835_VCBUS_SDRAM_UNCACHED 0xC0000000
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#define BCM2835_ARM_IO_BASE 0x20000000
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#define BCM2835_ARM_IO_SIZE 0x02000000
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/*
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* Convert physical address to VC bus address. Should be used
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* when submitting address over mailbox interface
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*/
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#define PHYS_TO_VCBUS(pa) ((pa) + BCM2835_VCBUS_SDRAM_CACHED)
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/* Check whether pa bellong top IO window */
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#define BCM2835_ARM_IS_IO(pa) (((pa) >= BCM2835_ARM_IO_BASE) && \
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((pa) < BCM2835_ARM_IO_BASE + BCM2835_ARM_IO_SIZE))
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/*
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* Convert physical address in IO space to VC bus address.
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*/
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#define IO_TO_VCBUS(pa) ((pa - BCM2835_ARM_IO_BASE) + \
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BCM2835_VCBUS_IO_BASE)
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/*
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* Convert address from VC bus space to physical. Should be used
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* when address is returned by VC over mailbox interface. e.g.
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* framebuffer base
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*/
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#define VCBUS_TO_PHYS(vca) ((vca) - BCM2835_VCBUS_SDRAM_CACHED)
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#endif /* _BCM2835_VCBUS_H_ */
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