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


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]

FreeBSD/Linux Kernel Cross Reference
sys/amd64/amd64/legacy.c

Version: -  FREEBSD  -  FREEBSD-12-STABLE  -  FREEBSD-12-0  -  FREEBSD-11-STABLE  -  FREEBSD-11-2  -  FREEBSD-11-1  -  FREEBSD-11-0  -  FREEBSD-10-STABLE  -  FREEBSD-10-4  -  FREEBSD-10-3  -  FREEBSD-10-2  -  FREEBSD-10-1  -  FREEBSD-10-0  -  FREEBSD-9-STABLE  -  FREEBSD-9-3  -  FREEBSD-9-2  -  FREEBSD-9-1  -  FREEBSD-9-0  -  FREEBSD-8-STABLE  -  FREEBSD-8-4  -  FREEBSD-8-3  -  FREEBSD-8-2  -  FREEBSD-8-1  -  FREEBSD-8-0  -  FREEBSD-7-STABLE  -  FREEBSD-7-4  -  FREEBSD-7-3  -  FREEBSD-7-2  -  FREEBSD-7-1  -  FREEBSD-7-0  -  FREEBSD-6-STABLE  -  FREEBSD-6-4  -  FREEBSD-6-3  -  FREEBSD-6-2  -  FREEBSD-6-1  -  FREEBSD-6-0  -  FREEBSD-5-STABLE  -  FREEBSD-5-5  -  FREEBSD-5-4  -  FREEBSD-5-3  -  FREEBSD-5-2  -  FREEBSD-5-1  -  FREEBSD-5-0  -  FREEBSD-4-STABLE  -  FREEBSD-3-STABLE  -  FREEBSD22  -  linux-2.6  -  linux-2.4.22  -  MK83  -  MK84  -  PLAN9  -  DFBSD  -  NETBSD  -  NETBSD5  -  NETBSD4  -  NETBSD3  -  NETBSD20  -  OPENBSD  -  xnu-517  -  xnu-792  -  xnu-792.6.70  -  xnu-1228  -  xnu-1456.1.26  -  xnu-1699.24.8  -  xnu-2050.18.24  -  OPENSOLARIS  -  minix-3-1-1 
SearchContext: -  none  -  3  -  10 

    1 /*-
    2  * Copyright 1998 Massachusetts Institute of Technology
    3  *
    4  * Permission to use, copy, modify, and distribute this software and
    5  * its documentation for any purpose and without fee is hereby
    6  * granted, provided that both the above copyright notice and this
    7  * permission notice appear in all copies, that both the above
    8  * copyright notice and this permission notice appear in all
    9  * supporting documentation, and that the name of M.I.T. not be used
   10  * in advertising or publicity pertaining to distribution of the
   11  * software without specific, written prior permission.  M.I.T. makes
   12  * no representations about the suitability of this software for any
   13  * purpose.  It is provided "as is" without express or implied
   14  * warranty.
   15  * 
   16  * THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''.  M.I.T. DISCLAIMS
   17  * ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE,
   18  * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
   19  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT
   20  * SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   21  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
   22  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
   23  * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
   24  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
   25  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
   26  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   27  * SUCH DAMAGE.
   28  */
   29 
   30 #include <sys/cdefs.h>
   31 __FBSDID("$FreeBSD: releng/7.4/sys/amd64/amd64/legacy.c 212893 2010-09-20 11:09:31Z avg $");
   32 
   33 /*
   34  * This code implements a system driver for legacy systems that do not
   35  * support ACPI or when ACPI support is not present in the kernel.
   36  */
   37 
   38 #include <sys/param.h>
   39 #include <sys/systm.h>
   40 #include <sys/bus.h>
   41 #include <sys/cpu.h>
   42 #include <sys/kernel.h>
   43 #include <sys/malloc.h>
   44 #include <sys/module.h>
   45 #include <machine/bus.h>
   46 #include <sys/pcpu.h>
   47 #include <sys/rman.h>
   48 #include <sys/smp.h>
   49 
   50 #include <machine/legacyvar.h>
   51 #include <machine/resource.h>
   52 
   53 static MALLOC_DEFINE(M_LEGACYDEV, "legacydrv", "legacy system device");
   54 struct legacy_device {
   55         int                     lg_pcibus;
   56 };
   57 
   58 #define DEVTOAT(dev)    ((struct legacy_device *)device_get_ivars(dev))
   59 
   60 static void legacy_identify(driver_t *driver, device_t parent);
   61 static  int legacy_probe(device_t);
   62 static  int legacy_attach(device_t);
   63 static  int legacy_print_child(device_t, device_t);
   64 static device_t legacy_add_child(device_t bus, u_int order, const char *name,
   65                                 int unit);
   66 static  int legacy_read_ivar(device_t, device_t, int, uintptr_t *);
   67 static  int legacy_write_ivar(device_t, device_t, int, uintptr_t);
   68 
   69 static device_method_t legacy_methods[] = {
   70         /* Device interface */
   71         DEVMETHOD(device_identify,      legacy_identify),
   72         DEVMETHOD(device_probe,         legacy_probe),
   73         DEVMETHOD(device_attach,        legacy_attach),
   74         DEVMETHOD(device_detach,        bus_generic_detach),
   75         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
   76         DEVMETHOD(device_suspend,       bus_generic_suspend),
   77         DEVMETHOD(device_resume,        bus_generic_resume),
   78 
   79         /* Bus interface */
   80         DEVMETHOD(bus_print_child,      legacy_print_child),
   81         DEVMETHOD(bus_add_child,        legacy_add_child),
   82         DEVMETHOD(bus_read_ivar,        legacy_read_ivar),
   83         DEVMETHOD(bus_write_ivar,       legacy_write_ivar),
   84         DEVMETHOD(bus_alloc_resource,   bus_generic_alloc_resource),
   85         DEVMETHOD(bus_release_resource, bus_generic_release_resource),
   86         DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
   87         DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
   88         DEVMETHOD(bus_setup_intr,       bus_generic_setup_intr),
   89         DEVMETHOD(bus_teardown_intr,    bus_generic_teardown_intr),
   90 
   91         { 0, 0 }
   92 };
   93 
   94 static driver_t legacy_driver = {
   95         "legacy",
   96         legacy_methods,
   97         1,                      /* no softc */
   98 };
   99 static devclass_t legacy_devclass;
  100 
  101 DRIVER_MODULE(legacy, nexus, legacy_driver, legacy_devclass, 0, 0);
  102 
  103 static void
  104 legacy_identify(driver_t *driver, device_t parent)
  105 {
  106 
  107         /*
  108          * Add child device with order of 11 so it gets probed
  109          * after ACPI (which is at order 10).
  110          */
  111         if (BUS_ADD_CHILD(parent, 11, "legacy", 0) == NULL)
  112                 panic("legacy: could not attach");
  113 }
  114 
  115 static int
  116 legacy_probe(device_t dev)
  117 {
  118         device_t acpi;
  119 
  120         /*
  121          * Fail to probe if ACPI is ok.
  122          */
  123         acpi = devclass_get_device(devclass_find("acpi"), 0);
  124         if (acpi != NULL && device_is_alive(acpi))
  125                 return (ENXIO);
  126         device_set_desc(dev, "legacy system");
  127         device_quiet(dev);
  128         return (0);
  129 }
  130 
  131 static int
  132 legacy_attach(device_t dev)
  133 {
  134         device_t child;
  135 
  136         /*
  137          * Let our child drivers identify any child devices that they
  138          * can find.  Once that is done attach any devices that we
  139          * found.
  140          */
  141         bus_generic_probe(dev);
  142         bus_generic_attach(dev);
  143 
  144         /*
  145          * If we didn't see ISA on a pci bridge, create some
  146          * connection points now so it shows up "on motherboard".
  147          */
  148         if (!devclass_get_device(devclass_find("isa"), 0)) {
  149                 child = BUS_ADD_CHILD(dev, 0, "isa", 0);
  150                 if (child == NULL)
  151                         panic("legacy_attach isa");
  152                 device_probe_and_attach(child);
  153         }
  154 
  155         return 0;
  156 }
  157 
  158 static int
  159 legacy_print_child(device_t bus, device_t child)
  160 {
  161         struct legacy_device *atdev = DEVTOAT(child);
  162         int retval = 0;
  163 
  164         retval += bus_print_child_header(bus, child);
  165         if (atdev->lg_pcibus != -1)
  166                 retval += printf(" pcibus %d", atdev->lg_pcibus);
  167         retval += printf(" on motherboard\n");  /* XXX "motherboard", ick */
  168 
  169         return (retval);
  170 }
  171 
  172 static device_t
  173 legacy_add_child(device_t bus, u_int order, const char *name, int unit)
  174 {
  175         device_t child;
  176         struct legacy_device *atdev;
  177 
  178         atdev = malloc(sizeof(struct legacy_device), M_LEGACYDEV,
  179             M_NOWAIT | M_ZERO);
  180         if (atdev == NULL)
  181                 return(NULL);
  182         atdev->lg_pcibus = -1;
  183 
  184         child = device_add_child_ordered(bus, order, name, unit);
  185         if (child == NULL)
  186                 free(atdev, M_LEGACYDEV);
  187         else
  188                 /* should we free this in legacy_child_detached? */
  189                 device_set_ivars(child, atdev);
  190 
  191         return (child);
  192 }
  193 
  194 static int
  195 legacy_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
  196 {
  197         struct legacy_device *atdev = DEVTOAT(child);
  198 
  199         switch (which) {
  200         case LEGACY_IVAR_PCIDOMAIN:
  201                 *result = 0;
  202                 break;
  203         case LEGACY_IVAR_PCIBUS:
  204                 *result = atdev->lg_pcibus;
  205                 break;
  206         default:
  207                 return ENOENT;
  208         }
  209         return 0;
  210 }
  211         
  212 
  213 static int
  214 legacy_write_ivar(device_t dev, device_t child, int which, uintptr_t value)
  215 {
  216         struct legacy_device *atdev = DEVTOAT(child);
  217 
  218         switch (which) {
  219         case LEGACY_IVAR_PCIDOMAIN:
  220                 return EINVAL;
  221         case LEGACY_IVAR_PCIBUS:
  222                 atdev->lg_pcibus = value;
  223                 break;
  224         default:
  225                 return ENOENT;
  226         }
  227         return 0;
  228 }
  229 
  230 /*
  231  * Legacy CPU attachment when ACPI is not available.  Drivers like
  232  * cpufreq(4) hang off this.
  233  */
  234 static void     cpu_identify(driver_t *driver, device_t parent);
  235 static int      cpu_read_ivar(device_t dev, device_t child, int index,
  236                     uintptr_t *result);
  237 static device_t cpu_add_child(device_t bus, u_int order, const char *name,
  238                     int unit);
  239 static struct resource_list *cpu_get_rlist(device_t dev, device_t child);
  240 
  241 struct cpu_device {
  242         struct resource_list cd_rl;
  243         struct pcpu *cd_pcpu;
  244 };
  245 
  246 static device_method_t cpu_methods[] = {
  247         /* Device interface */
  248         DEVMETHOD(device_identify,      cpu_identify),
  249         DEVMETHOD(device_probe,         bus_generic_probe),
  250         DEVMETHOD(device_attach,        bus_generic_attach),
  251         DEVMETHOD(device_detach,        bus_generic_detach),
  252         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
  253         DEVMETHOD(device_suspend,       bus_generic_suspend),
  254         DEVMETHOD(device_resume,        bus_generic_resume),
  255 
  256         /* Bus interface */
  257         DEVMETHOD(bus_add_child,        cpu_add_child),
  258         DEVMETHOD(bus_read_ivar,        cpu_read_ivar),
  259         DEVMETHOD(bus_print_child,      bus_generic_print_child),
  260         DEVMETHOD(bus_get_resource_list, cpu_get_rlist),
  261         DEVMETHOD(bus_get_resource,     bus_generic_rl_get_resource),
  262         DEVMETHOD(bus_set_resource,     bus_generic_rl_set_resource),
  263         DEVMETHOD(bus_alloc_resource,   bus_generic_rl_alloc_resource),
  264         DEVMETHOD(bus_release_resource, bus_generic_rl_release_resource),
  265         DEVMETHOD(bus_driver_added,     bus_generic_driver_added),
  266         DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
  267         DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
  268         DEVMETHOD(bus_setup_intr,       bus_generic_setup_intr),
  269         DEVMETHOD(bus_teardown_intr,    bus_generic_teardown_intr),
  270 
  271         { 0, 0 }
  272 };
  273 
  274 static driver_t cpu_driver = {
  275         "cpu",
  276         cpu_methods,
  277         1,              /* no softc */
  278 };
  279 static devclass_t cpu_devclass;
  280 DRIVER_MODULE(cpu, legacy, cpu_driver, cpu_devclass, 0, 0);
  281 
  282 static void
  283 cpu_identify(driver_t *driver, device_t parent)
  284 {
  285         device_t child;
  286         int i;
  287 
  288         /*
  289          * Attach a cpuX device for each CPU.  We use an order of 150
  290          * so that these devices are attached after the Host-PCI
  291          * bridges (which are added at order 100).
  292          */
  293         for (i = 0; i <= mp_maxid; i++)
  294                 if (!CPU_ABSENT(i)) {
  295                         child = BUS_ADD_CHILD(parent, 150, "cpu", i);
  296                         if (child == NULL)
  297                                 panic("legacy_attach cpu");
  298                 }
  299 }
  300 
  301 static device_t
  302 cpu_add_child(device_t bus, u_int order, const char *name, int unit)
  303 {
  304         struct cpu_device *cd;
  305         device_t child;
  306         struct pcpu *pc;
  307 
  308         if ((cd = malloc(sizeof(*cd), M_DEVBUF, M_NOWAIT | M_ZERO)) == NULL)
  309                 return (NULL);
  310 
  311         resource_list_init(&cd->cd_rl);
  312         pc = pcpu_find(device_get_unit(bus));
  313         cd->cd_pcpu = pc;
  314 
  315         child = device_add_child_ordered(bus, order, name, unit);
  316         if (child != NULL) {
  317                 pc->pc_device = child;
  318                 device_set_ivars(child, cd);
  319         } else
  320                 free(cd, M_DEVBUF);
  321         return (child);
  322 }
  323 
  324 static struct resource_list *
  325 cpu_get_rlist(device_t dev, device_t child)
  326 {
  327         struct cpu_device *cpdev;
  328 
  329         cpdev = device_get_ivars(child);
  330         return (&cpdev->cd_rl);
  331 }
  332 
  333 static int
  334 cpu_read_ivar(device_t dev, device_t child, int index, uintptr_t *result)
  335 {
  336         struct cpu_device *cpdev;
  337 
  338         if (index != CPU_IVAR_PCPU)
  339                 return (ENOENT);
  340         cpdev = device_get_ivars(child);
  341         *result = (uintptr_t)cpdev->cd_pcpu;
  342         return (0);
  343 }

Cache object: 9e1255dcfcbe505e6cdf6d17bbe6dc6c


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]


This page is part of the FreeBSD/Linux Linux Kernel Cross-Reference, and was automatically generated using a modified version of the LXR engine.