rv_ctrl.cc revision 7823:dac01f14f20f 
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 * 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: Ali Saidi
38 */
39
40#include "base/trace.hh"
41#include "dev/arm/rv_ctrl.hh"
42#include "mem/packet.hh"
43#include "mem/packet_access.hh"
44
45RealViewCtrl::RealViewCtrl(Params *p)
46    : BasicPioDevice(p)
47{
48    pioSize = 0xD4;
49}
50
51Tick
52RealViewCtrl::read(PacketPtr pkt)
53{
54    assert(pkt->getAddr() >= pioAddr && pkt->getAddr() < pioAddr + pioSize);
55    assert(pkt->getSize() == 4);
56    Addr daddr = pkt->getAddr() - pioAddr;
57    pkt->allocate();
58
59    switch(daddr) {
60      case ProcId:
61        pkt->set(params()->proc_id);
62        break;
63      case Clock24:
64        Tick clk;
65        clk = (Tick)(curTick() / (24 * SimClock::Float::MHz));
66        pkt->set((uint32_t)(clk));
67        break;
68      case Flash:
69        pkt->set<uint32_t>(0);
70        break;
71      default:
72        panic("Tried to read RealView I/O at offset %#x that doesn't exist\n", daddr);
73        break;
74    }
75    pkt->makeAtomicResponse();
76    return pioDelay;
77
78}
79
80Tick
81RealViewCtrl::write(PacketPtr pkt)
82{
83    assert(pkt->getAddr() >= pioAddr && pkt->getAddr() < pioAddr + pioSize);
84
85    Addr daddr = pkt->getAddr() - pioAddr;
86    switch (daddr) {
87      case Flash:
88        break;
89      default:
90        panic("Tried to write RVIO at offset %#x that doesn't exist\n", daddr);
91        break;
92    }
93    pkt->makeAtomicResponse();
94    return pioDelay;
95}
96
97void
98RealViewCtrl::serialize(std::ostream &os)
99{
100}
101
102void
103RealViewCtrl::unserialize(Checkpoint *cp, const std::string &section)
104{
105}
106
107RealViewCtrl *
108RealViewCtrlParams::create()
109{
110    return new RealViewCtrl(this);
111}
112