src/dev/arm/pci_host.cc

   1 /*
   2  * Copyright (c) 2015 ARM Limited
   3  * All rights reserved
   4  *
   5  * The license below extends only to copyright in the software and shall
   6  * not be construed as granting a license to any other intellectual
   7  * property including but not limited to intellectual property relating
   8  * to a hardware implementation of the functionality of the software
   9  * licensed hereunder.  You may use the software subject to the license
  10  * terms below provided that you ensure that this notice is replicated
  11  * unmodified and in its entirety in all distributions of the software,
  12  * modified or unmodified, in source code or in binary form.
  13  *
  14  * Redistribution and use in source and binary forms, with or without
  15  * modification, are permitted provided that the following conditions are
  16  * met: redistributions of source code must retain the above copyright
  17  * notice, this list of conditions and the following disclaimer;
  18  * redistributions in binary form must reproduce the above copyright
  19  * notice, this list of conditions and the following disclaimer in the
  20  * documentation and/or other materials provided with the distribution;
  21  * neither the name of the copyright holders nor the names of its
  22  * contributors may be used to endorse or promote products derived from
  23  * this software without specific prior written permission.
  24  *
  25  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  26  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  27  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  28  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  29  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  30  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  31  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  32  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  33  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  34  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  35  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  36  *
  37  * Authors: Andreas Sandberg
  38  */
  39
  40 #include "dev/arm/pci_host.hh"
  41
  42 #include "params/GenericArmPciHost.hh"
  43
  44 GenericArmPciHost::GenericArmPciHost(const GenericArmPciHostParams *p)
  45     : GenericPciHost(p),
  46       intPolicy(p->int_policy), intBase(p->int_base),
  47       intCount(p->int_count)
  48 {
  49 }
  50
  51
  52 uint32_t
  53 GenericArmPciHost::mapPciInterrupt(const PciBusAddr &addr, PciIntPin pin) const
  54 {
  55     fatal_if(pin == PciIntPin::NO_INT,
  56              "%02x:%02x.%i: Interrupt from a device without interrupts\n",
  57              addr.bus, addr.dev, addr.func);
  58
  59     switch (intPolicy) {
  60       case Enums::ARM_PCI_INT_STATIC:
  61         return GenericPciHost::mapPciInterrupt(addr, pin);
  62
  63       case Enums::ARM_PCI_INT_DEV:
  64         return intBase + (addr.dev % intCount);
  65
  66       case Enums::ARM_PCI_INT_PIN:
  67         return intBase + ((static_cast<uint8_t>(pin) - 1) % intCount);
  68
  69       default:
  70         fatal("Unsupported PCI interrupt routing policy.");
  71     }
  72 }
  73
  74
  75 GenericArmPciHost *
  76 GenericArmPciHostParams::create()
  77 {
  78     return new GenericArmPciHost(this);
  79 }