sys/bus/isa/i386/isa.c

   1 /*-
   2  * Copyright (c) 1998 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  * $FreeBSD: src/sys/i386/isa/isa.c,v 1.132.2.5 2002/03/03 05:42:50 nyan Exp $
  27  */
  28
  29 /*
  30  * Modifications for Intel architecture by Garrett A. Wollman.
  31  * Copyright 1998 Massachusetts Institute of Technology
  32  *
  33  * Permission to use, copy, modify, and distribute this software and
  34  * its documentation for any purpose and without fee is hereby
  35  * granted, provided that both the above copyright notice and this
  36  * permission notice appear in all copies, that both the above
  37  * copyright notice and this permission notice appear in all
  38  * supporting documentation, and that the name of M.I.T. not be used
  39  * in advertising or publicity pertaining to distribution of the
  40  * software without specific, written prior permission.  M.I.T. makes
  41  * no representations about the suitability of this software for any
  42  * purpose.  It is provided "as is" without express or implied
  43  * warranty.
  44  *
  45  * THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''.  M.I.T. DISCLAIMS
  46  * ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE,
  47  * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  48  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT
  49  * SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  50  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  51  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
  52  * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  53  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  54  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  55  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  56  * SUCH DAMAGE.
  57  */
  58
  59 #include <sys/param.h>
  60 #include <sys/bus.h>
  61 #include <sys/malloc.h>
  62 #include <sys/rman.h>
  63 #include <sys/machintr.h>
  64
  65 #include "../isavar.h"
  66 #include "../isa_common.h"
  67
  68 /*
  69  * This implementation simply passes the request up to the parent
  70  * bus, which in our case is the special i386 nexus, substituting any
  71  * configured values if the caller defaulted.  We can get away with
  72  * this because there is no special mapping for ISA resources on an Intel
  73  * platform.  When porting this code to another architecture, it may be
  74  * necessary to interpose a mapping layer here.
  75  */
  76 struct resource *
  77 isa_alloc_resource(device_t bus, device_t child, int type, int *rid,
  78     u_long start, u_long end, u_long count, u_int flags, int cpuid)
  79 {
  80         /*
  81          * Consider adding a resource definition. We allow rid 0-1 for
  82          * irq and drq, 0-3 for memory and 0-7 for ports which is
  83          * sufficient for isapnp.
  84          */
  85         int passthrough = (device_get_parent(child) != bus);
  86         int isdefault = (start == 0UL && end == ~0UL);
  87         struct isa_device* idev = DEVTOISA(child);
  88         struct resource_list *rl = &idev->id_resources;
  89         struct resource_list_entry *rle;
  90
  91         if (!passthrough && !isdefault) {
  92                 rle = resource_list_find(rl, type, *rid);
  93                 if (!rle) {
  94                         if (*rid < 0)
  95                                 return 0;
  96                         switch (type) {
  97                         case SYS_RES_IRQ:
  98                                 if (*rid >= ISA_NIRQ)
  99                                         return 0;
 100                                 cpuid = machintr_legacy_intr_cpuid(start);
 101                                 break;
 102                         case SYS_RES_DRQ:
 103                                 if (*rid >= ISA_NDRQ)
 104                                         return 0;
 105                                 break;
 106                         case SYS_RES_MEMORY:
 107                                 if (*rid >= ISA_NMEM)
 108                                         return 0;
 109                                 break;
 110                         case SYS_RES_IOPORT:
 111                                 if (*rid >= ISA_NPORT)
 112                                         return 0;
 113                                 break;
 114                         default:
 115                                 return 0;
 116                         }
 117                         resource_list_add(rl, type, *rid, start, end,
 118                             count, cpuid);
 119                 }
 120         }
 121
 122         return resource_list_alloc(rl, bus, child, type, rid,
 123                                    start, end, count, flags, cpuid);
 124 }
 125
 126 int
 127 isa_release_resource(device_t bus, device_t child, int type, int rid,
 128                      struct resource *r)
 129 {
 130         struct isa_device* idev = DEVTOISA(child);
 131         struct resource_list *rl = &idev->id_resources;
 132
 133         return resource_list_release(rl, bus, child, type, rid, r);
 134 }
 135
 136 /*
 137  * We can't use the bus_generic_* versions of these methods because those
 138  * methods always pass the bus param as the requesting device, and we need
 139  * to pass the child (the i386 nexus knows about this and is prepared to
 140  * deal).
 141  */
 142 int
 143 isa_setup_intr(device_t bus, device_t child, struct resource *r, int flags,
 144                void (*ihand)(void *), void *arg,
 145                void **cookiep, lwkt_serialize_t serializer)
 146 {
 147         return (BUS_SETUP_INTR(device_get_parent(bus), child, r, flags,
 148                                ihand, arg, cookiep, serializer, NULL));
 149 }
 150
 151 int
 152 isa_teardown_intr(device_t bus, device_t child, struct resource *r,
 153                   void *cookie)
 154 {
 155         return (BUS_TEARDOWN_INTR(device_get_parent(bus), child, r, cookie));
 156 }