ofw_subr.h (2325B) - Raw
1 /*- 2 * Copyright (c) 2015 Ian Lepore <ian@freebsd.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27 #ifndef _DEV_OFW_OFW_SUBR_H_ 28 #define _DEV_OFW_OFW_SUBR_H_ 29 30 /* 31 * Translate an address from the Nth tuple of a device node's reg properties to 32 * a physical memory address, by applying the range mappings from all ancestors. 33 * This assumes that all ancestor ranges are simple numerical offsets for which 34 * addition and subtraction operations will perform the required mapping (the 35 * bit-options in the high word of standard PCI properties are also handled). 36 * After the call, *pci_hi (if non-NULL) contains the phys.hi cell of the 37 * device's parent PCI bus, or OFW_PADDR_NOT_PCI if no PCI bus is involved. 38 * 39 * This is intended to be a helper function called by the platform-specific 40 * implementation of OF_decode_addr(), and not for direct use by device drivers. 41 */ 42 #define OFW_PADDR_NOT_PCI (~0) 43 44 int ofw_reg_to_paddr(phandle_t _dev, int _regno, bus_addr_t *_paddr, 45 bus_size_t *_size, pcell_t *_pci_hi); 46 47 int ofw_parse_bootargs(void); 48 49 #endif