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), flags(0)
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 ProcId0:
61 pkt->set(params()->proc_id0);
62 break;
63 case ProcId1:
64 pkt->set(params()->proc_id1);
65 break;
66 case Clock24:
67 Tick clk;
68 clk = (Tick)(curTick() / (24 * SimClock::Int::us));
69 pkt->set((uint32_t)(clk));
70 break;
71 case Clock100:
72 Tick clk100;
73 clk100 = (Tick)(curTick() / (100 * SimClock::Int::us));
74 pkt->set((uint32_t)(clk100));
75 break;
76 case Flash:
77 pkt->set<uint32_t>(0);
78 break;
79 case Clcd:
80 pkt->set<uint32_t>(0x00001F00);
81 break;
82 case Osc0:
83 pkt->set<uint32_t>(0x00012C5C);
84 break;
85 case Osc1:
86 pkt->set<uint32_t>(0x00002CC0);
87 break;
88 case Osc2:
89 pkt->set<uint32_t>(0x00002C75);
90 break;
91 case Osc3:
92 pkt->set<uint32_t>(0x00020211);
93 break;
94 case Osc4:
95 pkt->set<uint32_t>(0x00002C75);
96 break;
97 case Lock:
98 pkt->set<uint32_t>(sysLock);
99 break;
100 case Flags:
101 pkt->set<uint32_t>(flags);
102 break;
103 case IdReg:
104 pkt->set<uint32_t>(params()->idreg);
105 break;
106 case CfgStat:
107 pkt->set<uint32_t>(1);
108 default:
109 warn("Tried to read RealView I/O at offset %#x that doesn't exist\n",
110 daddr);
111 break;
112 }
113 pkt->makeAtomicResponse();
114 return pioDelay;
115
116}
117
118Tick
119RealViewCtrl::write(PacketPtr pkt)
120{
121 assert(pkt->getAddr() >= pioAddr && pkt->getAddr() < pioAddr + pioSize);
122
123 Addr daddr = pkt->getAddr() - pioAddr;
124 switch (daddr) {
125 case Flash:
126 case Clcd:
127 case Osc0:
128 case Osc1:
129 case Osc2:
130 case Osc3:
131 case Osc4:
132 break;
133 case Lock:
134 sysLock.lockVal = pkt->get<uint16_t>();
135 break;
136 case Flags:
137 flags = pkt->get<uint32_t>();
138 break;
139 case FlagsClr:
140 flags = 0;
141 break;
142 default:
143 warn("Tried to write RVIO at offset %#x that doesn't exist\n",
144 daddr);
145 break;
146 }
147 pkt->makeAtomicResponse();
148 return pioDelay;
149}
150
151void
152RealViewCtrl::serialize(std::ostream &os)
153{
154 SERIALIZE_SCALAR(flags);
155}
156
157void
158RealViewCtrl::unserialize(Checkpoint *cp, const std::string &section)
159{
160 UNSERIALIZE_SCALAR(flags);
161}
162
163RealViewCtrl *
164RealViewCtrlParams::create()
165{
166 return new RealViewCtrl(this);
167}