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50 lines
2.3 KiB
C
50 lines
2.3 KiB
C
/*-
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* Copyright (c) 2015 Ian Lepore <ian@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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#ifndef _DEV_OFW_OFW_SUBR_H_
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#define _DEV_OFW_OFW_SUBR_H_
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/*
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* Translate an address from the Nth tuple of a device node's reg properties to
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* a physical memory address, by applying the range mappings from all ancestors.
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* This assumes that all ancestor ranges are simple numerical offsets for which
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* addition and subtraction operations will perform the required mapping (the
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* bit-options in the high word of standard PCI properties are also handled).
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* After the call, *pci_hi (if non-NULL) contains the phys.hi cell of the
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* device's parent PCI bus, or OFW_PADDR_NOT_PCI if no PCI bus is involved.
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*
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* This is intended to be a helper function called by the platform-specific
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* implementation of OF_decode_addr(), and not for direct use by device drivers.
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*/
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#define OFW_PADDR_NOT_PCI (~0)
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int ofw_reg_to_paddr(phandle_t _dev, int _regno, bus_addr_t *_paddr,
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bus_size_t *_size, pcell_t *_pci_hi);
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int ofw_parse_bootargs(void);
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#endif
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