dev/tsunami_cchip.hh

   1 /*
   2  * Copyright (c) 2004 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
  29 /* @file
  30  * Emulation of the Tsunami CChip CSRs
  31  */
  32
  33 #ifndef __TSUNAMI_CCHIP_HH__
  34 #define __TSUNAMI_CCHIP_HH__
  35
  36 #include "dev/tsunami.hh"
  37 #include "base/range.hh"
  38 #include "dev/io_device.hh"
  39
  40 /*
  41  * Tsunami CChip
  42  */
  43 class TsunamiCChip : public PioDevice
  44 {
  45   private:
  46     /** The base address of this device */
  47     Addr addr;
  48
  49     /** The size of mappad from the above address */
  50     static const Addr size = 0xfff;
  51
  52   protected:
  53     /**
  54      * pointer to the tsunami object.
  55      * This is our access to all the other tsunami
  56      * devices.
  57      */
  58     Tsunami *tsunami;
  59
  60     /**
  61      * The dims are device interrupt mask registers.
  62      * One exists for each CPU, the DRIR X DIM = DIR
  63      */
  64     uint64_t dim[Tsunami::Max_CPUs];
  65
  66     /**
  67      * The dirs are device interrupt registers.
  68      * One exists for each CPU, the DRIR X DIM = DIR
  69      */
  70     uint64_t dir[Tsunami::Max_CPUs];
  71     bool dirInterrupting[Tsunami::Max_CPUs];
  72
  73     /**
  74      * This register contains bits for each PCI interrupt
  75      * that can occur.
  76      */
  77     uint64_t drir;
  78
  79     /**
  80      * The MISC register contains the CPU we are currently on
  81      * as well as bits to ack RTC and IPI interrupts.
  82      */
  83     uint64_t misc;
  84
  85     /** Count of the number of pending IPIs on a CPU */
  86     uint64_t ipiInterrupting[Tsunami::Max_CPUs];
  87
  88     /** Indicator of which CPUs have had an RTC interrupt */
  89     bool RTCInterrupting[Tsunami::Max_CPUs];
  90
  91   public:
  92     /**
  93      * Initialize the Tsunami CChip by setting all of the
  94      * device register to 0.
  95      * @param name name of this device.
  96      * @param t pointer back to the Tsunami object that we belong to.
  97      * @param a address we are mapped at.
  98      * @param mmu pointer to the memory controller that sends us events.
  99      * @param hier object to store parameters universal the device hierarchy
 100      * @param bus The bus that this device is attached to
 101      */
 102     TsunamiCChip(const std::string &name, Tsunami *t, Addr a,
 103                  MemoryController *mmu, HierParams *hier, Bus *bus,
 104                  Tick pio_latency);
 105
 106     /**
 107       * Process a read to the CChip.
 108       * @param req Contains the address to read from.
 109       * @param data A pointer to write the read data to.
 110       * @return The fault condition of the access.
 111       */
 112     virtual Fault read(MemReqPtr &req, uint8_t *data);
 113
 114
 115     /**
 116       * Process a write to the CChip.
 117       * @param req Contains the address to write to.
 118       * @param data The data to write.
 119       * @return The fault condition of the access.
 120       */
 121     virtual Fault write(MemReqPtr &req, const uint8_t *data);
 122
 123     /**
 124      * post an RTC interrupt to the CPU
 125      */
 126     void postRTC();
 127
 128     /**
 129      * post an interrupt to the CPU.
 130      * @param interrupt the interrupt number to post (0-64)
 131      */
 132     void postDRIR(uint32_t interrupt);
 133
 134     /**
 135      * clear an interrupt previously posted to the CPU.
 136      * @param interrupt the interrupt number to post (0-64)
 137      */
 138     void clearDRIR(uint32_t interrupt);
 139
 140     /**
 141      * Serialize this object to the given output stream.
 142      * @param os The stream to serialize to.
 143      */
 144     virtual void serialize(std::ostream &os);
 145
 146     /**
 147      * Reconstruct the state of this object from a checkpoint.
 148      * @param cp The checkpoint use.
 149      * @param section The section name of this object
 150      */
 151     virtual void unserialize(Checkpoint *cp, const std::string &section);
 152
 153     /**
 154      * Return how long this access will take.
 155      * @param req the memory request to calcuate
 156      * @return Tick when the request is done
 157      */
 158     Tick cacheAccess(MemReqPtr &req);
 159 };
 160
 161 #endif // __TSUNAMI_CCHIP_HH__