1/*
2 * Copyright (c) 2001-2005 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: Nathan Binkert
29 * Ali Saidi
30 * Steve Reinhardt
31 * Erik Hallnor
32 */
33
34/** @file
35 * Alpha Console Backdoor Definition
36 */
37
38#include <cstddef>
39#include <string>
40
41#include "config/full_system.hh"
42
43#if FULL_SYSTEM //XXX No AlphaSystem in SE mode.
44#include "arch/alpha/system.hh"
45#endif
46#include "base/inifile.hh"
47#include "base/str.hh"
48#include "base/trace.hh"
49#include "cpu/base.hh"
50#include "cpu/thread_context.hh"
51#include "debug/AlphaBackdoor.hh"
52#include "dev/alpha/backdoor.hh"
53#include "dev/platform.hh"
54#include "dev/simple_disk.hh"
55#include "dev/terminal.hh"
56#include "mem/packet.hh"
57#include "mem/packet_access.hh"
58#include "mem/physical.hh"
59#include "params/AlphaBackdoor.hh"
60#include "sim/sim_object.hh"
61
62using namespace std;
63using namespace AlphaISA;
64
65AlphaBackdoor::AlphaBackdoor(const Params *p)
66 : BasicPioDevice(p), disk(p->disk), terminal(p->terminal),
67#if FULL_SYSTEM //XXX No system pointer in SE mode.
68 system(p->system),
69#endif
70 cpu(p->cpu)
71{
72
73 pioSize = sizeof(struct AlphaAccess);
74
75 alphaAccess = new Access();
76 alphaAccess->last_offset = pioSize - 1;
77
78 alphaAccess->version = ALPHA_ACCESS_VERSION;
79 alphaAccess->diskUnit = 1;
80
81 alphaAccess->diskCount = 0;
82 alphaAccess->diskPAddr = 0;
83 alphaAccess->diskBlock = 0;
84 alphaAccess->diskOperation = 0;
85 alphaAccess->outputChar = 0;
86 alphaAccess->inputChar = 0;
87 std::memset(alphaAccess->cpuStack, 0, sizeof(alphaAccess->cpuStack));
88
89}
90
91void
92AlphaBackdoor::startup()
93{
94#if FULL_SYSTEM //XXX No system pointer in SE mode.
95 system->setAlphaAccess(pioAddr);
96 alphaAccess->numCPUs = system->numContexts();
97 alphaAccess->kernStart = system->getKernelStart();
98 alphaAccess->kernEnd = system->getKernelEnd();
99 alphaAccess->entryPoint = system->getKernelEntry();
100 alphaAccess->mem_size = system->physmem->size();
101 alphaAccess->cpuClock = cpu->frequency() / 1000000; // In MHz
102 alphaAccess->intrClockFrequency = params()->platform->intrFrequency();
103#endif
104}
105
106Tick
107AlphaBackdoor::read(PacketPtr pkt)
108{
109
110 /** XXX Do we want to push the addr munging to a bus brige or something? So
111 * the device has it's physical address and then the bridge adds on whatever
112 * machine dependent address swizzle is required?
113 */
114
115 assert(pkt->getAddr() >= pioAddr && pkt->getAddr() < pioAddr + pioSize);
116
117 Addr daddr = pkt->getAddr() - pioAddr;
118
119 pkt->allocate();
120 pkt->makeAtomicResponse();
121
122 switch (pkt->getSize())
123 {
124 case sizeof(uint32_t):
125 switch (daddr)
126 {
127 case offsetof(AlphaAccess, last_offset):
128 pkt->set(alphaAccess->last_offset);
129 break;
130 case offsetof(AlphaAccess, version):
131 pkt->set(alphaAccess->version);
132 break;
133 case offsetof(AlphaAccess, numCPUs):
134 pkt->set(alphaAccess->numCPUs);
135 break;
136 case offsetof(AlphaAccess, intrClockFrequency):
137 pkt->set(alphaAccess->intrClockFrequency);
138 break;
139 default:
140 /* Old console code read in everyting as a 32bit int
141 * we now break that for better error checking.
142 */
143 pkt->setBadAddress();
144 }
145 DPRINTF(AlphaBackdoor, "read: offset=%#x val=%#x\n", daddr,
146 pkt->get<uint32_t>());
147 break;
148 case sizeof(uint64_t):
149 switch (daddr)
150 {
151 case offsetof(AlphaAccess, inputChar):
152 pkt->set(terminal->console_in());
153 break;
154 case offsetof(AlphaAccess, cpuClock):
155 pkt->set(alphaAccess->cpuClock);
156 break;
157 case offsetof(AlphaAccess, mem_size):
158 pkt->set(alphaAccess->mem_size);
159 break;
160 case offsetof(AlphaAccess, kernStart):
161 pkt->set(alphaAccess->kernStart);
162 break;
163 case offsetof(AlphaAccess, kernEnd):
164 pkt->set(alphaAccess->kernEnd);
165 break;
166 case offsetof(AlphaAccess, entryPoint):
167 pkt->set(alphaAccess->entryPoint);
168 break;
169 case offsetof(AlphaAccess, diskUnit):
170 pkt->set(alphaAccess->diskUnit);
171 break;
172 case offsetof(AlphaAccess, diskCount):
173 pkt->set(alphaAccess->diskCount);
174 break;
175 case offsetof(AlphaAccess, diskPAddr):
176 pkt->set(alphaAccess->diskPAddr);
177 break;
178 case offsetof(AlphaAccess, diskBlock):
179 pkt->set(alphaAccess->diskBlock);
180 break;
181 case offsetof(AlphaAccess, diskOperation):
182 pkt->set(alphaAccess->diskOperation);
183 break;
184 case offsetof(AlphaAccess, outputChar):
185 pkt->set(alphaAccess->outputChar);
186 break;
187 default:
188 int cpunum = (daddr - offsetof(AlphaAccess, cpuStack)) /
189 sizeof(alphaAccess->cpuStack[0]);
190
191 if (cpunum >= 0 && cpunum < 64)
192 pkt->set(alphaAccess->cpuStack[cpunum]);
193 else
194 panic("Unknown 64bit access, %#x\n", daddr);
195 }
196 DPRINTF(AlphaBackdoor, "read: offset=%#x val=%#x\n", daddr,
197 pkt->get<uint64_t>());
198 break;
199 default:
200 pkt->setBadAddress();
201 }
202 return pioDelay;
203}
204
205Tick
206AlphaBackdoor::write(PacketPtr pkt)
207{
208 assert(pkt->getAddr() >= pioAddr && pkt->getAddr() < pioAddr + pioSize);
209 Addr daddr = pkt->getAddr() - pioAddr;
210
211 uint64_t val = pkt->get<uint64_t>();
212 assert(pkt->getSize() == sizeof(uint64_t));
213
214 switch (daddr) {
215 case offsetof(AlphaAccess, diskUnit):
216 alphaAccess->diskUnit = val;
217 break;
218
219 case offsetof(AlphaAccess, diskCount):
220 alphaAccess->diskCount = val;
221 break;
222
223 case offsetof(AlphaAccess, diskPAddr):
224 alphaAccess->diskPAddr = val;
225 break;
226
227 case offsetof(AlphaAccess, diskBlock):
228 alphaAccess->diskBlock = val;
229 break;
230
231 case offsetof(AlphaAccess, diskOperation):
232 if (val == 0x13)
233 disk->read(alphaAccess->diskPAddr, alphaAccess->diskBlock,
234 alphaAccess->diskCount);
235 else
236 panic("Invalid disk operation!");
237
238 break;
239
240 case offsetof(AlphaAccess, outputChar):
241 terminal->out((char)(val & 0xff));
242 break;
243
244 default:
245 int cpunum = (daddr - offsetof(AlphaAccess, cpuStack)) /
246 sizeof(alphaAccess->cpuStack[0]);
247 inform("Launching CPU %d @ %d", cpunum, curTick());
248 assert(val > 0 && "Must not access primary cpu");
249 if (cpunum >= 0 && cpunum < 64)
250 alphaAccess->cpuStack[cpunum] = val;
251 else
252 panic("Unknown 64bit access, %#x\n", daddr);
253 }
254
255 pkt->makeAtomicResponse();
256
257 return pioDelay;
258}
259
260void
261AlphaBackdoor::Access::serialize(ostream &os)
262{
263 SERIALIZE_SCALAR(last_offset);
264 SERIALIZE_SCALAR(version);
265 SERIALIZE_SCALAR(numCPUs);
266 SERIALIZE_SCALAR(mem_size);
267 SERIALIZE_SCALAR(cpuClock);
268 SERIALIZE_SCALAR(intrClockFrequency);
269 SERIALIZE_SCALAR(kernStart);
270 SERIALIZE_SCALAR(kernEnd);
271 SERIALIZE_SCALAR(entryPoint);
272 SERIALIZE_SCALAR(diskUnit);
273 SERIALIZE_SCALAR(diskCount);
274 SERIALIZE_SCALAR(diskPAddr);
275 SERIALIZE_SCALAR(diskBlock);
276 SERIALIZE_SCALAR(diskOperation);
277 SERIALIZE_SCALAR(outputChar);
278 SERIALIZE_SCALAR(inputChar);
279 SERIALIZE_ARRAY(cpuStack,64);
280}
281
282void
283AlphaBackdoor::Access::unserialize(Checkpoint *cp, const std::string &section)
284{
285 UNSERIALIZE_SCALAR(last_offset);
286 UNSERIALIZE_SCALAR(version);
287 UNSERIALIZE_SCALAR(numCPUs);
288 UNSERIALIZE_SCALAR(mem_size);
289 UNSERIALIZE_SCALAR(cpuClock);
290 UNSERIALIZE_SCALAR(intrClockFrequency);
291 UNSERIALIZE_SCALAR(kernStart);
292 UNSERIALIZE_SCALAR(kernEnd);
293 UNSERIALIZE_SCALAR(entryPoint);
294 UNSERIALIZE_SCALAR(diskUnit);
295 UNSERIALIZE_SCALAR(diskCount);
296 UNSERIALIZE_SCALAR(diskPAddr);
297 UNSERIALIZE_SCALAR(diskBlock);
298 UNSERIALIZE_SCALAR(diskOperation);
299 UNSERIALIZE_SCALAR(outputChar);
300 UNSERIALIZE_SCALAR(inputChar);
301 UNSERIALIZE_ARRAY(cpuStack, 64);
302}
303
304void
305AlphaBackdoor::serialize(ostream &os)
306{
307 alphaAccess->serialize(os);
308}
309
310void
311AlphaBackdoor::unserialize(Checkpoint *cp, const std::string &section)
312{
313 alphaAccess->unserialize(cp, section);
314}
315
316AlphaBackdoor *
317AlphaBackdoorParams::create()
318{
319 return new AlphaBackdoor(this);
320}