FreeBSD/Linux Kernel Cross Reference
sys/dev/ofw/ofw_subr.h

     /*-
      * Copyright (c) 2015 Ian Lepore <ian@freebsd.org>
      * All rights reserved.
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
      * are met:
      * 1. Redistributions of source code must retain the above copyright
      *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     *
     * $FreeBSD$
     */
    
    #ifndef _DEV_OFW_OFW_SUBR_H_
    #define _DEV_OFW_OFW_SUBR_H_
    
    /*
     * Translate an address from the Nth tuple of a device node's reg properties to
     * a physical memory address, by applying the range mappings from all ancestors.
     * This assumes that all ancestor ranges are simple numerical offsets for which
     * addition and subtraction operations will perform the required mapping (the
     * bit-options in the high word of standard PCI properties are also handled).
     * After the call, *pci_hi (if non-NULL) contains the phys.hi cell of the
     * device's parent PCI bus, or OFW_PADDR_NOT_PCI if no PCI bus is involved.
     *
     * This is intended to be a helper function called by the platform-specific
     * implementation of OF_decode_addr(), and not for direct use by device drivers.
     */
    #define OFW_PADDR_NOT_PCI       (~0)
    
    int ofw_reg_to_paddr(phandle_t _dev, int _regno, bus_addr_t *_paddr,
        bus_size_t *_size, pcell_t *_pci_hi);
    
    int ofw_parse_bootargs(void);
    
    #endif

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