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/8.4/sys/amd64/amd64/legacy.c 234151 2012-04-11 20:55:21Z 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 <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         int     lg_pcislot;
   57         int     lg_pcifunc;
   58 };
   59 
   60 #define DEVTOAT(dev)    ((struct legacy_device *)device_get_ivars(dev))
   61 
   62 static  int legacy_probe(device_t);
   63 static  int legacy_attach(device_t);
   64 static  int legacy_print_child(device_t, device_t);
   65 static device_t legacy_add_child(device_t bus, u_int order, const char *name,
   66                                 int unit);
   67 static  int legacy_read_ivar(device_t, device_t, int, uintptr_t *);
   68 static  int legacy_write_ivar(device_t, device_t, int, uintptr_t);
   69 
   70 static device_method_t legacy_methods[] = {
   71         /* Device interface */
   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_adjust_resource,  bus_generic_adjust_resource),
   86         DEVMETHOD(bus_release_resource, bus_generic_release_resource),
   87         DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
   88         DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
   89         DEVMETHOD(bus_setup_intr,       bus_generic_setup_intr),
   90         DEVMETHOD(bus_teardown_intr,    bus_generic_teardown_intr),
   91 
   92         { 0, 0 }
   93 };
   94 
   95 static driver_t legacy_driver = {
   96         "legacy",
   97         legacy_methods,
   98         1,                      /* no softc */
   99 };
  100 static devclass_t legacy_devclass;
  101 
  102 DRIVER_MODULE(legacy, nexus, legacy_driver, legacy_devclass, 0, 0);
  103 
  104 static int
  105 legacy_probe(device_t dev)
  106 {
  107 
  108         device_set_desc(dev, "legacy system");
  109         device_quiet(dev);
  110         return (0);
  111 }
  112 
  113 static int
  114 legacy_attach(device_t dev)
  115 {
  116         device_t child;
  117 
  118         /*
  119          * Let our child drivers identify any child devices that they
  120          * can find.  Once that is done attach any devices that we
  121          * found.
  122          */
  123         bus_generic_probe(dev);
  124         bus_generic_attach(dev);
  125 
  126         /*
  127          * If we didn't see ISA on a pci bridge, create some
  128          * connection points now so it shows up "on motherboard".
  129          */
  130         if (!devclass_get_device(devclass_find("isa"), 0)) {
  131                 child = BUS_ADD_CHILD(dev, 0, "isa", 0);
  132                 if (child == NULL)
  133                         panic("legacy_attach isa");
  134                 device_probe_and_attach(child);
  135         }
  136 
  137         return 0;
  138 }
  139 
  140 static int
  141 legacy_print_child(device_t bus, device_t child)
  142 {
  143         struct legacy_device *atdev = DEVTOAT(child);
  144         int retval = 0;
  145 
  146         retval += bus_print_child_header(bus, child);
  147         if (atdev->lg_pcibus != -1)
  148                 retval += printf(" pcibus %d", atdev->lg_pcibus);
  149         retval += printf(" on motherboard\n");  /* XXX "motherboard", ick */
  150 
  151         return (retval);
  152 }
  153 
  154 static device_t
  155 legacy_add_child(device_t bus, u_int order, const char *name, int unit)
  156 {
  157         device_t child;
  158         struct legacy_device *atdev;
  159 
  160         atdev = malloc(sizeof(struct legacy_device), M_LEGACYDEV,
  161             M_NOWAIT | M_ZERO);
  162         if (atdev == NULL)
  163                 return(NULL);
  164         atdev->lg_pcibus = -1;
  165         atdev->lg_pcislot = -1;
  166         atdev->lg_pcifunc = -1;
  167 
  168         child = device_add_child_ordered(bus, order, name, unit);
  169         if (child == NULL)
  170                 free(atdev, M_LEGACYDEV);
  171         else
  172                 /* should we free this in legacy_child_detached? */
  173                 device_set_ivars(child, atdev);
  174 
  175         return (child);
  176 }
  177 
  178 static int
  179 legacy_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
  180 {
  181         struct legacy_device *atdev = DEVTOAT(child);
  182 
  183         switch (which) {
  184         case LEGACY_IVAR_PCIDOMAIN:
  185                 *result = 0;
  186                 break;
  187         case LEGACY_IVAR_PCIBUS:
  188                 *result = atdev->lg_pcibus;
  189                 break;
  190         case LEGACY_IVAR_PCISLOT:
  191                 *result = atdev->lg_pcislot;
  192                 break;
  193         case LEGACY_IVAR_PCIFUNC:
  194                 *result = atdev->lg_pcifunc;
  195                 break;
  196         default:
  197                 return ENOENT;
  198         }
  199         return 0;
  200 }
  201         
  202 
  203 static int
  204 legacy_write_ivar(device_t dev, device_t child, int which, uintptr_t value)
  205 {
  206         struct legacy_device *atdev = DEVTOAT(child);
  207 
  208         switch (which) {
  209         case LEGACY_IVAR_PCIDOMAIN:
  210                 return EINVAL;
  211         case LEGACY_IVAR_PCIBUS:
  212                 atdev->lg_pcibus = value;
  213                 break;
  214         case LEGACY_IVAR_PCISLOT:
  215                 atdev->lg_pcislot = value;
  216                 break;
  217         case LEGACY_IVAR_PCIFUNC:
  218                 atdev->lg_pcifunc = value;
  219                 break;
  220         default:
  221                 return ENOENT;
  222         }
  223         return 0;
  224 }
  225 
  226 /*
  227  * Legacy CPU attachment when ACPI is not available.  Drivers like
  228  * cpufreq(4) hang off this.
  229  */
  230 static void     cpu_identify(driver_t *driver, device_t parent);
  231 static int      cpu_read_ivar(device_t dev, device_t child, int index,
  232                     uintptr_t *result);
  233 static device_t cpu_add_child(device_t bus, u_int order, const char *name,
  234                     int unit);
  235 static struct resource_list *cpu_get_rlist(device_t dev, device_t child);
  236 
  237 struct cpu_device {
  238         struct resource_list cd_rl;
  239         struct pcpu *cd_pcpu;
  240 };
  241 
  242 static device_method_t cpu_methods[] = {
  243         /* Device interface */
  244         DEVMETHOD(device_identify,      cpu_identify),
  245         DEVMETHOD(device_probe,         bus_generic_probe),
  246         DEVMETHOD(device_attach,        bus_generic_attach),
  247         DEVMETHOD(device_detach,        bus_generic_detach),
  248         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
  249         DEVMETHOD(device_suspend,       bus_generic_suspend),
  250         DEVMETHOD(device_resume,        bus_generic_resume),
  251 
  252         /* Bus interface */
  253         DEVMETHOD(bus_add_child,        cpu_add_child),
  254         DEVMETHOD(bus_read_ivar,        cpu_read_ivar),
  255         DEVMETHOD(bus_get_resource_list, cpu_get_rlist),
  256         DEVMETHOD(bus_get_resource,     bus_generic_rl_get_resource),
  257         DEVMETHOD(bus_set_resource,     bus_generic_rl_set_resource),
  258         DEVMETHOD(bus_alloc_resource,   bus_generic_rl_alloc_resource),
  259         DEVMETHOD(bus_release_resource, bus_generic_rl_release_resource),
  260         DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
  261         DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
  262         DEVMETHOD(bus_setup_intr,       bus_generic_setup_intr),
  263         DEVMETHOD(bus_teardown_intr,    bus_generic_teardown_intr),
  264 
  265         DEVMETHOD_END
  266 };
  267 
  268 static driver_t cpu_driver = {
  269         "cpu",
  270         cpu_methods,
  271         1,              /* no softc */
  272 };
  273 static devclass_t cpu_devclass;
  274 DRIVER_MODULE(cpu, legacy, cpu_driver, cpu_devclass, 0, 0);
  275 
  276 static void
  277 cpu_identify(driver_t *driver, device_t parent)
  278 {
  279         device_t child;
  280         int i;
  281 
  282         /*
  283          * Attach a cpuX device for each CPU.  We use an order of 150
  284          * so that these devices are attached after the Host-PCI
  285          * bridges (which are added at order 100).
  286          */
  287         CPU_FOREACH(i) {
  288                 child = BUS_ADD_CHILD(parent, 150, "cpu", i);
  289                 if (child == NULL)
  290                         panic("legacy_attach cpu");
  291         }
  292 }
  293 
  294 static device_t
  295 cpu_add_child(device_t bus, u_int order, const char *name, int unit)
  296 {
  297         struct cpu_device *cd;
  298         device_t child;
  299         struct pcpu *pc;
  300 
  301         if ((cd = malloc(sizeof(*cd), M_DEVBUF, M_NOWAIT | M_ZERO)) == NULL)
  302                 return (NULL);
  303 
  304         resource_list_init(&cd->cd_rl);
  305         pc = pcpu_find(device_get_unit(bus));
  306         cd->cd_pcpu = pc;
  307 
  308         child = device_add_child_ordered(bus, order, name, unit);
  309         if (child != NULL) {
  310                 pc->pc_device = child;
  311                 device_set_ivars(child, cd);
  312         } else
  313                 free(cd, M_DEVBUF);
  314         return (child);
  315 }
  316 
  317 static struct resource_list *
  318 cpu_get_rlist(device_t dev, device_t child)
  319 {
  320         struct cpu_device *cpdev;
  321 
  322         cpdev = device_get_ivars(child);
  323         return (&cpdev->cd_rl);
  324 }
  325 
  326 static int
  327 cpu_read_ivar(device_t dev, device_t child, int index, uintptr_t *result)
  328 {
  329         struct cpu_device *cpdev;
  330 
  331         if (index != CPU_IVAR_PCPU)
  332                 return (ENOENT);
  333         cpdev = device_get_ivars(child);
  334         *result = (uintptr_t)cpdev->cd_pcpu;
  335         return (0);
  336 }

Cache object: 27d0530bf04681f03098680fd6c9529a


[ 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.