isa_fake.cc revision 3499 
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 * Isa Fake Device implementation
33 */
34
35#include "base/trace.hh"
36#include "dev/isa_fake.hh"
37#include "mem/packet.hh"
38#include "mem/packet_access.hh"
39#include "sim/builder.hh"
40#include "sim/system.hh"
41
42using namespace std;
43
44IsaFake::IsaFake(Params *p)
45    : BasicPioDevice(p)
46{
47    if (!params()->retBadAddr)
48        pioSize = p->pio_size;
49
50    memset(&retData, p->retData, sizeof(retData));
51}
52
53void
54IsaFake::init()
55{
56    // Only init this device if it's connected to anything.
57    if (pioPort)
58        PioDevice::init();
59}
60
61
62Tick
63IsaFake::read(PacketPtr pkt)
64{
65    assert(pkt->result == Packet::Unknown);
66
67    if (params()->retBadAddr) {
68        DPRINTF(Tsunami, "read to bad address va=%#x size=%d\n",
69                pkt->getAddr(), pkt->getSize());
70        pkt->result = Packet::BadAddress;
71    } else {
72        assert(pkt->getAddr() >= pioAddr && pkt->getAddr() < pioAddr + pioSize);
73        DPRINTF(Tsunami, "read  va=%#x size=%d\n",
74                pkt->getAddr(), pkt->getSize());
75        switch (pkt->getSize()) {
76          case sizeof(uint64_t):
77             pkt->set(retData);
78             break;
79          case sizeof(uint32_t):
80             pkt->set((uint32_t)retData);
81             break;
82          case sizeof(uint16_t):
83             pkt->set((uint16_t)retData);
84             break;
85          case sizeof(uint8_t):
86             pkt->set((uint8_t)retData);
87             break;
88          default:
89            panic("invalid access size!\n");
90        }
91        pkt->result = Packet::Success;
92    }
93    return pioDelay;
94}
95
96Tick
97IsaFake::write(PacketPtr pkt)
98{
99    if (params()->retBadAddr) {
100        DPRINTF(Tsunami, "write to bad address va=%#x size=%d \n",
101                pkt->getAddr(), pkt->getSize());
102        pkt->result = Packet::BadAddress;
103    } else {
104        DPRINTF(Tsunami, "write - va=%#x size=%d \n",
105                pkt->getAddr(), pkt->getSize());
106        pkt->result = Packet::Success;
107    }
108    return pioDelay;
109}
110
111BEGIN_DECLARE_SIM_OBJECT_PARAMS(IsaFake)
112
113    Param<Addr> pio_addr;
114    Param<Tick> pio_latency;
115    Param<Addr> pio_size;
116    Param<bool> ret_bad_addr;
117    Param<uint8_t> ret_data;
118    SimObjectParam<Platform *> platform;
119    SimObjectParam<System *> system;
120
121END_DECLARE_SIM_OBJECT_PARAMS(IsaFake)
122
123BEGIN_INIT_SIM_OBJECT_PARAMS(IsaFake)
124
125    INIT_PARAM(pio_addr, "Device Address"),
126    INIT_PARAM(pio_latency, "Programmed IO latency"),
127    INIT_PARAM(pio_size, "Size of address range"),
128    INIT_PARAM(ret_bad_addr, "Return pkt status BadAddr"),
129    INIT_PARAM(ret_data, "Data to return if not bad addr"),
130    INIT_PARAM(platform, "platform"),
131    INIT_PARAM(system, "system object")
132
133END_INIT_SIM_OBJECT_PARAMS(IsaFake)
134
135CREATE_SIM_OBJECT(IsaFake)
136{
137    IsaFake::Params *p = new IsaFake::Params;
138    p->name = getInstanceName();
139    p->pio_addr = pio_addr;
140    p->pio_delay = pio_latency;
141    p->pio_size = pio_size;
142    p->retBadAddr = ret_bad_addr;
143    p->retData = ret_data;
144    p->platform = platform;
145    p->system = system;
146    return new IsaFake(p);
147}
148
149REGISTER_SIM_OBJECT("IsaFake", IsaFake)
150