src/dev/arm/amba_device.cc

   1 /*
   2  * Copyright (c) 2010 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  * Copyright (c) 2005 The Regents of The University of Michigan
  15  * All rights reserved.
  16  *
  17  * Redistribution and use in source and binary forms, with or without
  18  * modification, are permitted provided that the following conditions are
  19  * met: redistributions of source code must retain the above copyright
  20  * notice, this list of conditions and the following disclaimer;
  21  * redistributions in binary form must reproduce the above copyright
  22  * notice, this list of conditions and the following disclaimer in the
  23  * documentation and/or other materials provided with the distribution;
  24  * neither the name of the copyright holders nor the names of its
  25  * contributors may be used to endorse or promote products derived from
  26  * this software without specific prior written permission.
  27  *
  28  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  29  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  30  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  31  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  32  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  33  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  34  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  35  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  36  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  37  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  38  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  39  */
  40
  41 #include "dev/arm/amba_device.hh"
  42
  43 #include "base/trace.hh"
  44 #include "debug/AMBA.hh"
  45 #include "dev/arm/amba_fake.hh"
  46 #include "mem/packet.hh"
  47 #include "mem/packet_access.hh"
  48
  49 const uint64_t AmbaVendor = ULL(0xb105f00d00000000);
  50
  51 AmbaPioDevice::AmbaPioDevice(const Params *p, Addr pio_size)
  52     : BasicPioDevice(p, pio_size), ambaId(AmbaVendor | p->amba_id)
  53 {
  54 }
  55
  56 AmbaIntDevice::AmbaIntDevice(const Params *p, Addr pio_size)
  57     : AmbaPioDevice(p, pio_size),
  58       interrupt(p->interrupt->get()), intDelay(p->int_delay)
  59 {
  60 }
  61
  62
  63
  64 AmbaDmaDevice::AmbaDmaDevice(const Params *p, Addr pio_size)
  65     : DmaDevice(p), ambaId(AmbaVendor | p->amba_id),
  66       pioAddr(p->pio_addr), pioSize(pio_size),
  67       pioDelay(p->pio_latency), interrupt(p->interrupt->get())
  68 {
  69 }
  70
  71 bool
  72 AmbaDevice::readId(PacketPtr pkt, uint64_t amba_id, Addr pio_addr)
  73 {
  74     Addr daddr = pkt->getAddr() - pio_addr;
  75     if (daddr < AMBA_PER_ID0 || daddr > AMBA_CEL_ID3)
  76         return false;
  77
  78     int byte = (daddr - AMBA_PER_ID0) << 1;
  79     // Too noisy right now
  80     DPRINTF(AMBA, "Returning %#x for offset %#x(%d)\n",
  81             (amba_id >> byte) & 0xFF,
  82             pkt->getAddr() - pio_addr, byte);
  83     assert(pkt->getSize() == 4);
  84     pkt->setLE<uint32_t>((amba_id >> byte) & 0xFF);
  85     return true;
  86 }