diff options
Diffstat (limited to 'sys/dev/cfe/cfe_resource.c')
| -rw-r--r-- | sys/dev/cfe/cfe_resource.c | 159 |
1 files changed, 159 insertions, 0 deletions
diff --git a/sys/dev/cfe/cfe_resource.c b/sys/dev/cfe/cfe_resource.c new file mode 100644 index 0000000..125fe6c --- /dev/null +++ b/sys/dev/cfe/cfe_resource.c @@ -0,0 +1,159 @@ +/*- + * Copyright (c) 2007 Bruce M. Simpson. + * 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. + */ + +/* + * Driver to swallow up memory ranges reserved by CFE platform firmware. + * CFE on Sentry5 doesn't specify reserved ranges, so this is not useful + * at the present time. + * TODO: Don't attach this off nexus. + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/kernel.h> +#include <sys/socket.h> + +#include <sys/module.h> +#include <sys/bus.h> + +#include <machine/bus.h> +#include <machine/resource.h> +#include <sys/rman.h> + +#include <dev/cfe/cfe_api.h> +#include <dev/cfe/cfe_error.h> + +#define MAX_CFE_RESERVATIONS 16 + +struct cferes_softc { + int rnum; + int rid[MAX_CFE_RESERVATIONS]; + struct resource *res[MAX_CFE_RESERVATIONS]; +}; + +static int +cferes_probe(device_t dev) +{ + + return (0); +} + +static int +cferes_attach(device_t dev) +{ + + return (0); +} + +static void +cferes_identify(driver_t* driver, device_t parent) +{ + device_t child; + int i; + struct resource *res; + int result; + int rid; + struct cferes_softc *sc; + uint64_t addr, len, type; + + child = BUS_ADD_CHILD(parent, 100, "cferes", -1); + device_set_driver(child, driver); + sc = device_get_softc(child); + + sc->rnum = 0; + for (i = 0; i < ~0U; i++) { + result = cfe_enummem(i, CFE_FLG_FULL_ARENA, &addr, &len, &type); + if (result < 0) + break; + if (type != CFE_MI_RESERVED) { + if (bootverbose) + printf("%s: skipping non reserved range 0x%0jx(%jd)\n", + device_getnameunit(child), + (uintmax_t)addr, (uintmax_t)len); + continue; + } + + bus_set_resource(child, SYS_RES_MEMORY, sc->rnum, addr, len); + rid = sc->rnum; + res = bus_alloc_resource_any(child, SYS_RES_MEMORY, &rid, 0); + if (res == NULL) { + bus_delete_resource(child, SYS_RES_MEMORY, sc->rnum); + continue; + } + sc->rid[sc->rnum] = rid; + sc->res[sc->rnum] = res; + + sc->rnum++; + if (sc->rnum == MAX_CFE_RESERVATIONS) + break; + } + + if (sc->rnum == 0) { + device_delete_child(parent, child); + return; + } + + device_set_desc(child, "CFE reserved memory"); +} + +static int +cferes_detach(device_t dev) +{ + int i; + struct cferes_softc *sc = device_get_softc(dev); + + for (i = 0; i < sc->rnum; i++) { + bus_release_resource(dev, SYS_RES_MEMORY, sc->rid[i], + sc->res[i]); + } + + return (0); +} + +static device_method_t cferes_methods[] = { + /* Device interface */ + DEVMETHOD(device_identify, cferes_identify), + DEVMETHOD(device_probe, cferes_probe), + DEVMETHOD(device_attach, cferes_attach), + DEVMETHOD(device_detach, cferes_detach), + DEVMETHOD(device_shutdown, bus_generic_shutdown), + DEVMETHOD(device_suspend, bus_generic_suspend), + DEVMETHOD(device_resume, bus_generic_resume), + { 0, 0 } +}; + +static driver_t cferes_driver = { + "cferes", + cferes_methods, + sizeof (struct cferes_softc) +}; + +static devclass_t cferes_devclass; + +DRIVER_MODULE(cfe, nexus, cferes_driver, cferes_devclass, 0, 0); |
