718cf2ccb9
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162 lines
4.1 KiB
C
162 lines
4.1 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2007 Bruce M. Simpson.
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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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/*
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* Driver to swallow up memory ranges reserved by CFE platform firmware.
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* CFE on Sentry5 doesn't specify reserved ranges, so this is not useful
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* at the present time.
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* TODO: Don't attach this off nexus.
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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/systm.h>
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#include <sys/kernel.h>
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#include <sys/socket.h>
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#include <sys/module.h>
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#include <sys/bus.h>
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#include <machine/bus.h>
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#include <machine/resource.h>
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#include <sys/rman.h>
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#include <dev/cfe/cfe_api.h>
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#include <dev/cfe/cfe_error.h>
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#define MAX_CFE_RESERVATIONS 16
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struct cferes_softc {
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int rnum;
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int rid[MAX_CFE_RESERVATIONS];
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struct resource *res[MAX_CFE_RESERVATIONS];
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};
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static int
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cferes_probe(device_t dev)
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{
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return (BUS_PROBE_NOWILDCARD);
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}
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static int
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cferes_attach(device_t dev)
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{
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return (0);
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}
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static void
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cferes_identify(driver_t* driver, device_t parent)
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{
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device_t child;
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int i;
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struct resource *res;
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int result;
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int rid;
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struct cferes_softc *sc;
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uint64_t addr, len, type;
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child = BUS_ADD_CHILD(parent, 100, "cferes", -1);
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device_set_driver(child, driver);
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sc = device_get_softc(child);
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sc->rnum = 0;
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for (i = 0; i < ~0U; i++) {
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result = cfe_enummem(i, CFE_FLG_FULL_ARENA, &addr, &len, &type);
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if (result < 0)
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break;
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if (type != CFE_MI_RESERVED) {
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if (bootverbose)
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printf("%s: skipping non reserved range 0x%0jx(%jd)\n",
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device_getnameunit(child),
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(uintmax_t)addr, (uintmax_t)len);
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continue;
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}
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bus_set_resource(child, SYS_RES_MEMORY, sc->rnum, addr, len);
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rid = sc->rnum;
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res = bus_alloc_resource_any(child, SYS_RES_MEMORY, &rid, 0);
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if (res == NULL) {
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bus_delete_resource(child, SYS_RES_MEMORY, sc->rnum);
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continue;
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}
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sc->rid[sc->rnum] = rid;
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sc->res[sc->rnum] = res;
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sc->rnum++;
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if (sc->rnum == MAX_CFE_RESERVATIONS)
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break;
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}
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if (sc->rnum == 0) {
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device_delete_child(parent, child);
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return;
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}
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device_set_desc(child, "CFE reserved memory");
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}
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static int
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cferes_detach(device_t dev)
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{
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int i;
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struct cferes_softc *sc = device_get_softc(dev);
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for (i = 0; i < sc->rnum; i++) {
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bus_release_resource(dev, SYS_RES_MEMORY, sc->rid[i],
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sc->res[i]);
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}
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return (0);
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}
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static device_method_t cferes_methods[] = {
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/* Device interface */
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DEVMETHOD(device_identify, cferes_identify),
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DEVMETHOD(device_probe, cferes_probe),
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DEVMETHOD(device_attach, cferes_attach),
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DEVMETHOD(device_detach, cferes_detach),
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DEVMETHOD(device_shutdown, bus_generic_shutdown),
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DEVMETHOD(device_suspend, bus_generic_suspend),
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DEVMETHOD(device_resume, bus_generic_resume),
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{ 0, 0 }
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};
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static driver_t cferes_driver = {
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"cferes",
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cferes_methods,
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sizeof (struct cferes_softc)
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};
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static devclass_t cferes_devclass;
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DRIVER_MODULE(cfe, nexus, cferes_driver, cferes_devclass, 0, 0);
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