05274f8a8b
will allow for code that uses the old fdt_get_range and fdt_regsize functions to find a range, map it, access, then unmap to replace this, up to and including the map, with a call to OF_decode_addr. As this function should only be used in the early boot code the unmap is mostly do document we no longer need the mapping as it's a no-op, at least on arm. Reviewed by: jhibbits Sponsored by: ABT Systems Ltd Differential Revision: https://reviews.freebsd.org/D5258
59 lines
1.9 KiB
C
59 lines
1.9 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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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/bus.h>
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#include <machine/bus.h>
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#include <dev/ofw/openfirm.h>
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#include <dev/ofw/ofw_subr.h>
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extern struct bus_space memmap_bus;
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int
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OF_decode_addr(phandle_t dev, int regno, bus_space_tag_t *tag,
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bus_space_handle_t *handle, bus_size_t *sz)
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{
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bus_addr_t addr;
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bus_size_t size;
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int err;
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err = ofw_reg_to_paddr(dev, regno, &addr, &size, NULL);
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if (err != 0)
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return (err);
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*tag = &memmap_bus;
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if (sz != NULL)
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*sz = size;
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return (bus_space_map(*tag, addr, size, 0, handle));
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}
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