FreeBSD/Linux Kernel Cross Reference
sys/dev/ofw/ofw_subr.h
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 * $FreeBSD$
27 */
28
29 #ifndef _DEV_OFW_OFW_SUBR_H_
30 #define _DEV_OFW_OFW_SUBR_H_
31
32 /*
33 * Translate an address from the Nth tuple of a device node's reg properties to
34 * a physical memory address, by applying the range mappings from all ancestors.
35 * This assumes that all ancestor ranges are simple numerical offsets for which
36 * addition and subtraction operations will perform the required mapping (the
37 * bit-options in the high word of standard PCI properties are also handled).
38 * After the call, *pci_hi (if non-NULL) contains the phys.hi cell of the
39 * device's parent PCI bus, or OFW_PADDR_NOT_PCI if no PCI bus is involved.
40 *
41 * This is intended to be a helper function called by the platform-specific
42 * implementation of OF_decode_addr(), and not for direct use by device drivers.
43 */
44 #define OFW_PADDR_NOT_PCI (~0)
45
46 int ofw_reg_to_paddr(phandle_t _dev, int _regno, bus_addr_t *_paddr,
47 bus_size_t *_size, pcell_t *_pci_hi);
48
49 int ofw_parse_bootargs(void);
50
51 #endif
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