The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/sparc64/central/central.c

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    1 /*-
    2  * Copyright (c) 2003 Jake Burkholder.
    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 
   27 #include <sys/cdefs.h>
   28 __FBSDID("$FreeBSD: releng/9.0/sys/sparc64/central/central.c 200874 2009-12-22 21:02:46Z marius $");
   29 
   30 #include <sys/param.h>
   31 #include <sys/systm.h>
   32 #include <sys/bus.h>
   33 #include <sys/kernel.h>
   34 #include <sys/malloc.h>
   35 #include <sys/module.h>
   36 
   37 #include <dev/ofw/ofw_bus.h>
   38 #include <dev/ofw/ofw_bus_subr.h>
   39 #include <dev/ofw/openfirm.h>
   40 
   41 #include <machine/bus.h>
   42 #include <machine/resource.h>
   43 
   44 #include <sys/rman.h>
   45 
   46 #include <sparc64/sbus/ofw_sbus.h>
   47 
   48 struct central_devinfo {
   49         struct ofw_bus_devinfo  cdi_obdinfo;
   50         struct resource_list    cdi_rl;
   51 };
   52 
   53 struct central_softc {
   54         int                     sc_nrange;
   55         struct sbus_ranges      *sc_ranges;
   56 };
   57 
   58 static device_probe_t central_probe;
   59 static device_attach_t central_attach;
   60 static bus_print_child_t central_print_child;
   61 static bus_probe_nomatch_t central_probe_nomatch;
   62 static bus_alloc_resource_t central_alloc_resource;
   63 static bus_get_resource_list_t central_get_resource_list;
   64 static ofw_bus_get_devinfo_t central_get_devinfo;
   65 
   66 static int central_print_res(struct central_devinfo *);
   67 
   68 static device_method_t central_methods[] = {
   69         /* Device interface */
   70         DEVMETHOD(device_probe,         central_probe),
   71         DEVMETHOD(device_attach,        central_attach),
   72         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
   73         DEVMETHOD(device_suspend,       bus_generic_suspend),
   74         DEVMETHOD(device_resume,        bus_generic_resume),
   75 
   76         /* Bus interface */
   77         DEVMETHOD(bus_print_child,      central_print_child),
   78         DEVMETHOD(bus_probe_nomatch,    central_probe_nomatch),
   79         DEVMETHOD(bus_alloc_resource,   central_alloc_resource),
   80         DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
   81         DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
   82         DEVMETHOD(bus_release_resource, bus_generic_rl_release_resource),
   83         DEVMETHOD(bus_setup_intr,       bus_generic_setup_intr),
   84         DEVMETHOD(bus_teardown_intr,    bus_generic_teardown_intr),
   85         DEVMETHOD(bus_get_resource,     bus_generic_rl_get_resource),
   86         DEVMETHOD(bus_get_resource_list, central_get_resource_list),
   87         DEVMETHOD(bus_child_pnpinfo_str, ofw_bus_gen_child_pnpinfo_str),
   88 
   89         /* ofw_bus interface */
   90         DEVMETHOD(ofw_bus_get_devinfo,  central_get_devinfo),
   91         DEVMETHOD(ofw_bus_get_compat,   ofw_bus_gen_get_compat),
   92         DEVMETHOD(ofw_bus_get_model,    ofw_bus_gen_get_model),
   93         DEVMETHOD(ofw_bus_get_name,     ofw_bus_gen_get_name),
   94         DEVMETHOD(ofw_bus_get_node,     ofw_bus_gen_get_node),
   95         DEVMETHOD(ofw_bus_get_type,     ofw_bus_gen_get_type),
   96 
   97         KOBJMETHOD_END
   98 };
   99 
  100 static driver_t central_driver = {
  101         "central",
  102         central_methods,
  103         sizeof(struct central_softc),
  104 };
  105 
  106 static devclass_t central_devclass;
  107 
  108 EARLY_DRIVER_MODULE(central, nexus, central_driver, central_devclass, 0, 0,
  109     BUS_PASS_BUS);
  110 MODULE_DEPEND(fhc, nexus, 1, 1, 1);
  111 MODULE_VERSION(central, 1);
  112 
  113 static int
  114 central_probe(device_t dev)
  115 {
  116 
  117         if (strcmp(ofw_bus_get_name(dev), "central") == 0) {
  118                 device_set_desc(dev, "central");
  119                 return (0);
  120         }
  121         return (ENXIO);
  122 }
  123 
  124 static int
  125 central_attach(device_t dev)
  126 {
  127         struct central_devinfo *cdi;
  128         struct sbus_regs *reg;
  129         struct central_softc *sc;
  130         phandle_t child;
  131         phandle_t node;
  132         device_t cdev;
  133         int nreg;
  134         int i;
  135 
  136         sc = device_get_softc(dev);
  137         node = ofw_bus_get_node(dev);
  138 
  139         sc->sc_nrange = OF_getprop_alloc(node, "ranges",
  140             sizeof(*sc->sc_ranges), (void **)&sc->sc_ranges);
  141         if (sc->sc_nrange == -1) {
  142                 device_printf(dev, "can't get ranges\n");
  143                 return (ENXIO);
  144         }
  145 
  146         for (child = OF_child(node); child != 0; child = OF_peer(child)) {
  147                 cdi = malloc(sizeof(*cdi), M_DEVBUF, M_WAITOK | M_ZERO);
  148                 if (ofw_bus_gen_setup_devinfo(&cdi->cdi_obdinfo, child) != 0) {
  149                         free(cdi, M_DEVBUF);
  150                         continue;
  151                 }
  152                 nreg = OF_getprop_alloc(child, "reg", sizeof(*reg),
  153                     (void **)&reg);
  154                 if (nreg == -1) {
  155                         device_printf(dev, "<%s>: incomplete\n",
  156                             cdi->cdi_obdinfo.obd_name);
  157                         ofw_bus_gen_destroy_devinfo(&cdi->cdi_obdinfo);
  158                         free(cdi, M_DEVBUF);
  159                         continue;
  160                 }
  161                 resource_list_init(&cdi->cdi_rl);
  162                 for (i = 0; i < nreg; i++)
  163                         resource_list_add(&cdi->cdi_rl, SYS_RES_MEMORY, i,
  164                             reg[i].sbr_offset, reg[i].sbr_offset +
  165                             reg[i].sbr_size, reg[i].sbr_size);
  166                 free(reg, M_OFWPROP);
  167                 cdev = device_add_child(dev, NULL, -1);
  168                 if (cdev == NULL) {
  169                         device_printf(dev, "<%s>: device_add_child failed\n",
  170                             cdi->cdi_obdinfo.obd_name);
  171                         resource_list_free(&cdi->cdi_rl);
  172                         ofw_bus_gen_destroy_devinfo(&cdi->cdi_obdinfo);
  173                         free(cdi, M_DEVBUF);
  174                         continue;
  175                 }
  176                 device_set_ivars(cdev, cdi);
  177         }
  178 
  179         return (bus_generic_attach(dev));
  180 }
  181 
  182 static int
  183 central_print_child(device_t dev, device_t child)
  184 {
  185         int rv;
  186 
  187         rv = bus_print_child_header(dev, child);
  188         rv += central_print_res(device_get_ivars(child));
  189         rv += bus_print_child_footer(dev, child);
  190         return (rv);
  191 }
  192 
  193 static void
  194 central_probe_nomatch(device_t dev, device_t child)
  195 {
  196         const char *type;
  197 
  198         device_printf(dev, "<%s>", ofw_bus_get_name(child));
  199         central_print_res(device_get_ivars(child));
  200         type = ofw_bus_get_type(child);
  201         printf(" type %s (no driver attached)\n",
  202             type != NULL ? type : "unknown");
  203 }
  204 
  205 static struct resource *
  206 central_alloc_resource(device_t bus, device_t child, int type, int *rid,
  207     u_long start, u_long end, u_long count, u_int flags)
  208 {
  209         struct resource_list *rl;
  210         struct resource_list_entry *rle;
  211         struct central_softc *sc;
  212         struct resource *res;
  213         bus_addr_t coffset;
  214         bus_addr_t cend;
  215         bus_addr_t phys;
  216         int isdefault;
  217         int passthrough;
  218         int i;
  219 
  220         isdefault = (start == 0UL && end == ~0UL);
  221         passthrough = (device_get_parent(child) != bus);
  222         res = NULL;
  223         rle = NULL;
  224         rl = BUS_GET_RESOURCE_LIST(bus, child);
  225         sc = device_get_softc(bus);
  226         switch (type) {
  227         case SYS_RES_IRQ:
  228                 return (resource_list_alloc(rl, bus, child, type, rid, start,
  229                     end, count, flags));
  230         case SYS_RES_MEMORY:
  231                 if (!passthrough) {
  232                         rle = resource_list_find(rl, type, *rid);
  233                         if (rle == NULL)
  234                                 return (NULL);
  235                         if (rle->res != NULL)
  236                                 panic("%s: resource entry is busy", __func__);
  237                         if (isdefault) {
  238                                 start = rle->start;
  239                                 count = ulmax(count, rle->count);
  240                                 end = ulmax(rle->end, start + count - 1);
  241                         }
  242                 }
  243                 for (i = 0; i < sc->sc_nrange; i++) {
  244                         coffset = sc->sc_ranges[i].coffset;
  245                         cend = coffset + sc->sc_ranges[i].size - 1;
  246                         if (start >= coffset && end <= cend) {
  247                                 start -= coffset;
  248                                 end -= coffset;
  249                                 phys = sc->sc_ranges[i].poffset |
  250                                     ((bus_addr_t)sc->sc_ranges[i].pspace << 32);
  251                                 res = bus_generic_alloc_resource(bus, child,
  252                                     type, rid, phys + start, phys + end,
  253                                     count, flags);
  254                                 if (!passthrough)
  255                                         rle->res = res;
  256                                 break;
  257                         }
  258                 }
  259                 break;
  260         }
  261         return (res);
  262 }
  263 
  264 static struct resource_list *
  265 central_get_resource_list(device_t bus, device_t child)
  266 {
  267         struct central_devinfo *cdi;
  268 
  269         cdi = device_get_ivars(child);
  270         return (&cdi->cdi_rl);
  271 }
  272 
  273 static const struct ofw_bus_devinfo *
  274 central_get_devinfo(device_t bus, device_t child)
  275 {
  276         struct central_devinfo *cdi;
  277 
  278         cdi = device_get_ivars(child);
  279         return (&cdi->cdi_obdinfo);
  280 }
  281 
  282 static int
  283 central_print_res(struct central_devinfo *cdi)
  284 {
  285 
  286         return (resource_list_print_type(&cdi->cdi_rl, "mem", SYS_RES_MEMORY,
  287             "%#lx"));
  288 }

Cache object: 65d6c1af97db5bf63ab488c66de328bd


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