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/isa/isahint.c

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    1 /*-
    2  * Copyright (c) 1999 Doug Rabson
    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/6.4/sys/isa/isahint.c 144985 2005-04-13 03:26:24Z mdodd $");
   29 
   30 #include <sys/param.h>
   31 #include <sys/systm.h>
   32 #include <sys/kernel.h>
   33 #include <sys/bus.h>
   34 #include <sys/module.h>
   35 #include <isa/isavar.h>
   36 #include <machine/resource.h>
   37 
   38 static void
   39 isahint_add_device(device_t parent, const char *name, int unit)
   40 {
   41         device_t        child;
   42         int             sensitive, start, count;
   43         int             order;
   44 
   45         /* device-specific flag overrides any wildcard */
   46         sensitive = 0;
   47         if (resource_int_value(name, unit, "sensitive", &sensitive) != 0)
   48                 resource_int_value(name, -1, "sensitive", &sensitive);
   49 
   50         if (sensitive)
   51                 order = ISA_ORDER_SENSITIVE;
   52         else
   53                 order = ISA_ORDER_SPECULATIVE;
   54 
   55         child = BUS_ADD_CHILD(parent, order, name, unit);
   56         if (child == 0)
   57                 return;
   58 
   59         start = 0;
   60         count = 0;
   61         resource_int_value(name, unit, "port", &start);
   62         resource_int_value(name, unit, "portsize", &count);
   63         if (start > 0 || count > 0)
   64                 bus_set_resource(child, SYS_RES_IOPORT, 0, start, count);
   65 
   66         start = 0;
   67         count = 0;
   68         resource_int_value(name, unit, "maddr", &start);
   69         resource_int_value(name, unit, "msize", &count);
   70         if (start > 0 || count > 0)
   71                 bus_set_resource(child, SYS_RES_MEMORY, 0, start, count);
   72 
   73         if (resource_int_value(name, unit, "irq", &start) == 0 && start > 0)
   74                 bus_set_resource(child, SYS_RES_IRQ, 0, start, 1);
   75 
   76         if (resource_int_value(name, unit, "drq", &start) == 0 && start >= 0)
   77                 bus_set_resource(child, SYS_RES_DRQ, 0, start, 1);
   78 
   79         if (resource_disabled(name, unit))
   80                 device_disable(child);
   81 
   82         isa_set_configattr(child, (isa_get_configattr(child)|ISACFGATTR_HINTS));
   83 }
   84 
   85 static void
   86 isahint_identify(driver_t *driver, device_t parent)
   87 {
   88         int i;
   89         static char buf[] = "isaXXX";
   90         const char *dname;
   91         int dunit;
   92 
   93         /*
   94          * Add all devices configured to be attached to parent.
   95          */
   96         sprintf(buf, "isa%d", device_get_unit(parent));
   97         i = 0;
   98         while ((resource_find_match(&i, &dname, &dunit, "at", buf)) == 0) {
   99                 if (strcmp(dname, "atkbd") == 0)
  100                         continue;       /* old GENERIC kludge */
  101                 isahint_add_device(parent, dname, dunit);
  102         }
  103 
  104         /*
  105          * and isa?
  106          */
  107         i = 0;
  108         while ((resource_find_match(&i, &dname, &dunit, "at", "isa")) == 0) {
  109                 if (strcmp(dname, "atkbd") == 0)
  110                         continue;       /* old GENERIC kludge */
  111                 isahint_add_device(parent, dname, dunit);
  112         }
  113 }
  114 
  115 static device_method_t isahint_methods[] = {
  116         /* Device interface */
  117         DEVMETHOD(device_identify,      isahint_identify),
  118 
  119         { 0, 0 }
  120 };
  121 
  122 static driver_t isahint_driver = {
  123         "hint",
  124         isahint_methods,
  125         1,                      /* no softc */
  126 };
  127 
  128 static devclass_t hint_devclass;
  129 
  130 DRIVER_MODULE(isahint, isa, isahint_driver, hint_devclass, 0, 0);

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