src/dev/alpha/tsunami_pchip.hh

   1 /*
   2  * Copyright (c) 2004-2005 The Regents of The University of Michigan
   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 are
   7  * met: redistributions of source code must retain the above copyright
   8  * notice, this list of conditions and the following disclaimer;
   9  * redistributions in binary form must reproduce the above copyright
  10  * notice, this list of conditions and the following disclaimer in the
  11  * documentation and/or other materials provided with the distribution;
  12  * neither the name of the copyright holders nor the names of its
  13  * contributors may be used to endorse or promote products derived from
  14  * this software without specific prior written permission.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  17  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  18  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  19  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  20  * OWNER OR CONTRIBUTORS 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 USE,
  23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  26  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27  *
  28  * Authors: Ali Saidi
  29  */
  30
  31 /** @file
  32  * Tsunami PCI interface CSRs
  33  */
  34
  35 #ifndef __TSUNAMI_PCHIP_HH__
  36 #define __TSUNAMI_PCHIP_HH__
  37
  38 #include "dev/alpha/tsunami.hh"
  39 #include "dev/pci/host.hh"
  40 #include "params/TsunamiPChip.hh"
  41
  42 /**
  43  * A very simple implementation of the Tsunami PCI interface chips.
  44  */
  45 class TsunamiPChip : public GenericPciHost
  46 {
  47   protected:
  48
  49     /** Pchip control register */
  50     uint64_t pctl;
  51
  52     /** Window Base addresses */
  53     uint64_t wsba[4];
  54
  55     /** Window masks */
  56     uint64_t wsm[4];
  57
  58     /** Translated Base Addresses */
  59     uint64_t tba[4];
  60
  61   public:
  62     typedef TsunamiPChipParams Params;
  63     /**
  64      * Register the PChip with the mmu and init all wsba, wsm, and tba to 0
  65      * @param p pointer to the parameters struct
  66      */
  67     TsunamiPChip(const Params *p);
  68
  69     const Params *
  70     params() const
  71     {
  72         return dynamic_cast<const Params *>(_params);
  73     }
  74
  75
  76     void serialize(CheckpointOut &cp) const override;
  77     void unserialize(CheckpointIn &cp) override;
  78
  79   public:
  80     Tick read(PacketPtr pkt) override;
  81     Tick write(PacketPtr pkt) override;
  82
  83     AddrRangeList getAddrRanges() const override;
  84
  85     /**
  86      * Translate a PCI bus address to a memory address for DMA.
  87      * @todo Andrew says this needs to be fixed. What's wrong with it?
  88      * @param pci_addr PCI address to translate.
  89      * @return memory system address
  90      */
  91     Addr dmaAddr(const PciBusAddr &addr, Addr pci_addr) const override;
  92
  93   protected:
  94     const AddrRange pioRange;
  95     const Tick pioDelay;
  96 };
  97
  98 #endif // __TSUNAMI_PCHIP_HH__