xref: /freebsd-11-stable/sys/mips/mips/ofw_machdep.c

/*-
 * 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.
 */

#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");

#include <sys/param.h>
#include <sys/bus.h>

#include <machine/bus.h>
#include <machine/fdt.h>

#include <dev/ofw/openfirm.h>
#include <dev/ofw/ofw_subr.h>

int
OF_decode_addr(phandle_t dev, int regno, bus_space_tag_t *tag,
    bus_space_handle_t *handle, bus_size_t *sz)
{
	bus_addr_t addr;
	bus_size_t size;
	pcell_t pci_hi;
	int flags, res;

	res = ofw_reg_to_paddr(dev, regno, &addr, &size, &pci_hi);
	if (res < 0)
		return (res);

	/*
	 * Nothing special to do for PCI busses right now.
	 * This may need to be handled per-platform when it does come up.
	 */
#ifdef notyet
	if (pci_hi == OFW_PADDR_NOT_PCI) {
		*tag = fdtbus_bs_tag;
		flags = 0;
	} else {
		*tag = fdtbus_bs_tag;
		flags = (pci_hi & OFW_PCI_PHYS_HI_PREFETCHABLE) ?
		    BUS_SPACE_MAP_PREFETCHABLE: 0;
	}
#else
	*tag = fdtbus_bs_tag;
	flags = 0;
#endif

	if (sz != NULL)
		*sz = size;

	return (bus_space_map(*tag, addr, size, flags, handle));
}