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/i386/i386/legacy.c

Version: -  FREEBSD  -  FREEBSD-13-STABLE  -  FREEBSD-13-0  -  FREEBSD-12-STABLE  -  FREEBSD-12-0  -  FREEBSD-11-STABLE  -  FREEBSD-11-0  -  FREEBSD-10-STABLE  -  FREEBSD-10-0  -  FREEBSD-9-STABLE  -  FREEBSD-9-0  -  FREEBSD-8-STABLE  -  FREEBSD-8-0  -  FREEBSD-7-STABLE  -  FREEBSD-7-0  -  FREEBSD-6-STABLE  -  FREEBSD-6-0  -  FREEBSD-5-STABLE  -  FREEBSD-5-0  -  FREEBSD-4-STABLE  -  FREEBSD-3-STABLE  -  FREEBSD22  -  l41  -  OPENBSD  -  linux-2.6  -  MK84  -  PLAN9  -  xnu-8792 
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/9.0/sys/i386/i386/legacy.c 222929 2011-06-10 12:30:16Z jhb $");
   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 "opt_mca.h"
   51 #ifdef DEV_MCA
   52 #include <i386/bios/mca_machdep.h>
   53 #endif
   54 
   55 #include <machine/clock.h>
   56 #include <machine/legacyvar.h>
   57 #include <machine/resource.h>
   58 
   59 static MALLOC_DEFINE(M_LEGACYDEV, "legacydrv", "legacy system device");
   60 struct legacy_device {
   61         int                     lg_pcibus;
   62 };
   63 
   64 #define DEVTOAT(dev)    ((struct legacy_device *)device_get_ivars(dev))
   65 
   66 static  int legacy_probe(device_t);
   67 static  int legacy_attach(device_t);
   68 static  int legacy_print_child(device_t, device_t);
   69 static device_t legacy_add_child(device_t bus, u_int order, const char *name,
   70                                 int unit);
   71 static  int legacy_read_ivar(device_t, device_t, int, uintptr_t *);
   72 static  int legacy_write_ivar(device_t, device_t, int, uintptr_t);
   73 
   74 static device_method_t legacy_methods[] = {
   75         /* Device interface */
   76         DEVMETHOD(device_probe,         legacy_probe),
   77         DEVMETHOD(device_attach,        legacy_attach),
   78         DEVMETHOD(device_detach,        bus_generic_detach),
   79         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
   80         DEVMETHOD(device_suspend,       bus_generic_suspend),
   81         DEVMETHOD(device_resume,        bus_generic_resume),
   82 
   83         /* Bus interface */
   84         DEVMETHOD(bus_print_child,      legacy_print_child),
   85         DEVMETHOD(bus_add_child,        legacy_add_child),
   86         DEVMETHOD(bus_read_ivar,        legacy_read_ivar),
   87         DEVMETHOD(bus_write_ivar,       legacy_write_ivar),
   88         DEVMETHOD(bus_alloc_resource,   bus_generic_alloc_resource),
   89         DEVMETHOD(bus_adjust_resource,  bus_generic_adjust_resource),
   90         DEVMETHOD(bus_release_resource, bus_generic_release_resource),
   91         DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
   92         DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
   93         DEVMETHOD(bus_setup_intr,       bus_generic_setup_intr),
   94         DEVMETHOD(bus_teardown_intr,    bus_generic_teardown_intr),
   95 
   96         { 0, 0 }
   97 };
   98 
   99 static driver_t legacy_driver = {
  100         "legacy",
  101         legacy_methods,
  102         1,                      /* no softc */
  103 };
  104 static devclass_t legacy_devclass;
  105 
  106 DRIVER_MODULE(legacy, nexus, legacy_driver, legacy_devclass, 0, 0);
  107 
  108 static int
  109 legacy_probe(device_t dev)
  110 {
  111 
  112         device_set_desc(dev, "legacy system");
  113         device_quiet(dev);
  114         return (0);
  115 }
  116 
  117 static int
  118 legacy_attach(device_t dev)
  119 {
  120         device_t child;
  121 
  122         /*
  123          * Let our child drivers identify any child devices that they
  124          * can find.  Once that is done attach any devices that we
  125          * found.
  126          */
  127         bus_generic_probe(dev);
  128         bus_generic_attach(dev);
  129 
  130 #ifndef PC98
  131         /*
  132          * If we didn't see EISA or ISA on a pci bridge, create some
  133          * connection points now so they show up "on motherboard".
  134          */
  135         if (!devclass_get_device(devclass_find("eisa"), 0)) {
  136                 child = BUS_ADD_CHILD(dev, 0, "eisa", 0);
  137                 if (child == NULL)
  138                         panic("legacy_attach eisa");
  139                 device_probe_and_attach(child);
  140         }
  141 #endif
  142 #ifdef DEV_MCA
  143         if (MCA_system && !devclass_get_device(devclass_find("mca"), 0)) {
  144                 child = BUS_ADD_CHILD(dev, 0, "mca", 0);
  145                 if (child == 0)
  146                         panic("legacy_probe mca");
  147                 device_probe_and_attach(child);
  148         }
  149 #endif
  150         if (!devclass_get_device(devclass_find("isa"), 0)) {
  151                 child = BUS_ADD_CHILD(dev, 0, "isa", 0);
  152                 if (child == NULL)
  153                         panic("legacy_attach isa");
  154                 device_probe_and_attach(child);
  155         }
  156 
  157         return 0;
  158 }
  159 
  160 static int
  161 legacy_print_child(device_t bus, device_t child)
  162 {
  163         struct legacy_device *atdev = DEVTOAT(child);
  164         int retval = 0;
  165 
  166         retval += bus_print_child_header(bus, child);
  167         if (atdev->lg_pcibus != -1)
  168                 retval += printf(" pcibus %d", atdev->lg_pcibus);
  169         retval += printf(" on motherboard\n");  /* XXX "motherboard", ick */
  170 
  171         return (retval);
  172 }
  173 
  174 static device_t
  175 legacy_add_child(device_t bus, u_int order, const char *name, int unit)
  176 {
  177         device_t child;
  178         struct legacy_device *atdev;
  179 
  180         atdev = malloc(sizeof(struct legacy_device), M_LEGACYDEV,
  181             M_NOWAIT | M_ZERO);
  182         if (atdev == NULL)
  183                 return(NULL);
  184         atdev->lg_pcibus = -1;
  185 
  186         child = device_add_child_ordered(bus, order, name, unit);
  187         if (child == NULL)
  188                 free(atdev, M_LEGACYDEV);
  189         else
  190                 /* should we free this in legacy_child_detached? */
  191                 device_set_ivars(child, atdev);
  192 
  193         return (child);
  194 }
  195 
  196 static int
  197 legacy_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
  198 {
  199         struct legacy_device *atdev = DEVTOAT(child);
  200 
  201         switch (which) {
  202         case LEGACY_IVAR_PCIDOMAIN:
  203                 *result = 0;
  204                 break;
  205         case LEGACY_IVAR_PCIBUS:
  206                 *result = atdev->lg_pcibus;
  207                 break;
  208         default:
  209                 return ENOENT;
  210         }
  211         return 0;
  212 }
  213         
  214 
  215 static int
  216 legacy_write_ivar(device_t dev, device_t child, int which, uintptr_t value)
  217 {
  218         struct legacy_device *atdev = DEVTOAT(child);
  219 
  220         switch (which) {
  221         case LEGACY_IVAR_PCIDOMAIN:
  222                 return EINVAL;
  223         case LEGACY_IVAR_PCIBUS:
  224                 atdev->lg_pcibus = value;
  225                 break;
  226         default:
  227                 return ENOENT;
  228         }
  229         return 0;
  230 }
  231 
  232 /*
  233  * Legacy CPU attachment when ACPI is not available.  Drivers like
  234  * cpufreq(4) hang off this.
  235  */
  236 static void     cpu_identify(driver_t *driver, device_t parent);
  237 static int      cpu_read_ivar(device_t dev, device_t child, int index,
  238                     uintptr_t *result);
  239 static device_t cpu_add_child(device_t bus, u_int order, const char *name,
  240                     int unit);
  241 static struct resource_list *cpu_get_rlist(device_t dev, device_t child);
  242 
  243 struct cpu_device {
  244         struct resource_list cd_rl;
  245         struct pcpu *cd_pcpu;
  246 };
  247 
  248 static device_method_t cpu_methods[] = {
  249         /* Device interface */
  250         DEVMETHOD(device_identify,      cpu_identify),
  251         DEVMETHOD(device_probe,         bus_generic_probe),
  252         DEVMETHOD(device_attach,        bus_generic_attach),
  253         DEVMETHOD(device_detach,        bus_generic_detach),
  254         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
  255         DEVMETHOD(device_suspend,       bus_generic_suspend),
  256         DEVMETHOD(device_resume,        bus_generic_resume),
  257 
  258         /* Bus interface */
  259         DEVMETHOD(bus_add_child,        cpu_add_child),
  260         DEVMETHOD(bus_read_ivar,        cpu_read_ivar),
  261         DEVMETHOD(bus_print_child,      bus_generic_print_child),
  262         DEVMETHOD(bus_get_resource_list, cpu_get_rlist),
  263         DEVMETHOD(bus_get_resource,     bus_generic_rl_get_resource),
  264         DEVMETHOD(bus_set_resource,     bus_generic_rl_set_resource),
  265         DEVMETHOD(bus_alloc_resource,   bus_generic_rl_alloc_resource),
  266         DEVMETHOD(bus_release_resource, bus_generic_rl_release_resource),
  267         DEVMETHOD(bus_driver_added,     bus_generic_driver_added),
  268         DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
  269         DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
  270         DEVMETHOD(bus_setup_intr,       bus_generic_setup_intr),
  271         DEVMETHOD(bus_teardown_intr,    bus_generic_teardown_intr),
  272 
  273         { 0, 0 }
  274 };
  275 
  276 static driver_t cpu_driver = {
  277         "cpu",
  278         cpu_methods,
  279         1,              /* no softc */
  280 };
  281 static devclass_t cpu_devclass;
  282 DRIVER_MODULE(cpu, legacy, cpu_driver, cpu_devclass, 0, 0);
  283 
  284 static void
  285 cpu_identify(driver_t *driver, device_t parent)
  286 {
  287         device_t child;
  288         int i;
  289 
  290         /*
  291          * Attach a cpuX device for each CPU.  We use an order of 150
  292          * so that these devices are attached after the Host-PCI
  293          * bridges (which are added at order 100).
  294          */
  295         CPU_FOREACH(i) {
  296                 child = BUS_ADD_CHILD(parent, 150, "cpu", i);
  297                 if (child == NULL)
  298                         panic("legacy_attach cpu");
  299         }
  300 }
  301 
  302 static device_t
  303 cpu_add_child(device_t bus, u_int order, const char *name, int unit)
  304 {
  305         struct cpu_device *cd;
  306         device_t child;
  307         struct pcpu *pc;
  308 
  309         if ((cd = malloc(sizeof(*cd), M_DEVBUF, M_NOWAIT | M_ZERO)) == NULL)
  310                 return (NULL);
  311 
  312         resource_list_init(&cd->cd_rl);
  313         pc = pcpu_find(device_get_unit(bus));
  314         cd->cd_pcpu = pc;
  315 
  316         child = device_add_child_ordered(bus, order, name, unit);
  317         if (child != NULL) {
  318                 pc->pc_device = child;
  319                 device_set_ivars(child, cd);
  320         } else
  321                 free(cd, M_DEVBUF);
  322         return (child);
  323 }
  324 
  325 static struct resource_list *
  326 cpu_get_rlist(device_t dev, device_t child)
  327 {
  328         struct cpu_device *cpdev;
  329 
  330         cpdev = device_get_ivars(child);
  331         return (&cpdev->cd_rl);
  332 }
  333 
  334 static int
  335 cpu_read_ivar(device_t dev, device_t child, int index, uintptr_t *result)
  336 {
  337         struct cpu_device *cpdev;
  338 
  339         switch (index) {
  340         case CPU_IVAR_PCPU:
  341                 cpdev = device_get_ivars(child);
  342                 *result = (uintptr_t)cpdev->cd_pcpu;
  343                 break;
  344         case CPU_IVAR_NOMINAL_MHZ:
  345                 if (tsc_is_invariant) {
  346                         *result = (uintptr_t)(atomic_load_acq_64(&tsc_freq) /
  347                             1000000);
  348                         break;
  349                 }
  350                 /* FALLTHROUGH */
  351         default:
  352                 return (ENOENT);
  353         }
  354         return (0);
  355 }

Cache object: 20e585fb0042830346f898d5bdaae189


[ 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.