system.cc revision 12005:f4b9607db0af 
1/*
2 * Copyright (c) 2010, 2012-2013, 2015 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) 2002-2006 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 * Authors: Ali Saidi
41 */
42
43#include "arch/arm/system.hh"
44
45#include <iostream>
46
47#include "base/loader/object_file.hh"
48#include "base/loader/symtab.hh"
49#include "cpu/thread_context.hh"
50#include "mem/fs_translating_port_proxy.hh"
51#include "mem/physical.hh"
52#include "sim/full_system.hh"
53
54using namespace std;
55using namespace Linux;
56
57ArmSystem::ArmSystem(Params *p)
58    : System(p),
59      bootLoaders(), bootldr(nullptr),
60      _haveSecurity(p->have_security),
61      _haveLPAE(p->have_lpae),
62      _haveVirtualization(p->have_virtualization),
63      _genericTimer(nullptr),
64      _highestELIs64(p->highest_el_is_64),
65      _resetAddr64(p->reset_addr_64),
66      _physAddrRange64(p->phys_addr_range_64),
67      _haveLargeAsid64(p->have_large_asid_64),
68      _m5opRange(p->m5ops_base ?
69                 RangeSize(p->m5ops_base, 0x10000) :
70                 AddrRange(1, 0)), // Create an empty range if disabled
71      multiProc(p->multi_proc)
72{
73    // Check if the physical address range is valid
74    if (_highestELIs64 && (
75            _physAddrRange64 < 32 ||
76            _physAddrRange64 > 48 ||
77            (_physAddrRange64 % 4 != 0 && _physAddrRange64 != 42))) {
78        fatal("Invalid physical address range (%d)\n", _physAddrRange64);
79    }
80
81    bootLoaders.reserve(p->boot_loader.size());
82    for (const auto &bl : p->boot_loader) {
83        std::unique_ptr<ObjectFile> obj;
84        obj.reset(createObjectFile(bl));
85
86        fatal_if(!obj, "Could not read bootloader: %s\n", bl);
87        bootLoaders.emplace_back(std::move(obj));
88    }
89
90    if (kernel) {
91        bootldr = getBootLoader(kernel);
92    } else if (!bootLoaders.empty()) {
93        // No kernel specified, default to the first boot loader
94        bootldr = bootLoaders[0].get();
95    }
96
97    if (!bootLoaders.empty() && !bootldr)
98        fatal("Can't find a matching boot loader / kernel combination!");
99
100    if (bootldr) {
101        bootldr->loadGlobalSymbols(debugSymbolTable);
102        if ((bootldr->getArch() == ObjectFile::Arm64) && !_highestELIs64) {
103            warn("Highest ARM exception-level set to AArch32 but bootloader "
104                  "is for AArch64. Assuming you wanted these to match.\n");
105            _highestELIs64 = true;
106        } else if ((bootldr->getArch() == ObjectFile::Arm) && _highestELIs64) {
107            warn("Highest ARM exception-level set to AArch64 but bootloader "
108                  "is for AArch32. Assuming you wanted these to match.\n");
109            _highestELIs64 = false;
110        }
111    }
112
113    debugPrintkEvent = addKernelFuncEvent<DebugPrintkEvent>("dprintk");
114}
115
116void
117ArmSystem::initState()
118{
119    // Moved from the constructor to here since it relies on the
120    // address map being resolved in the interconnect
121
122    // Call the initialisation of the super class
123    System::initState();
124
125    const Params* p = params();
126
127    if (bootldr) {
128        bootldr->loadSections(physProxy);
129
130        uint8_t jump_to_bl_32[] =
131        {
132            0x07, 0xf0, 0xa0, 0xe1  // branch to r7 in aarch32
133        };
134
135        uint8_t jump_to_bl_64[] =
136        {
137            0xe0, 0x00, 0x1f, 0xd6  // instruction "br x7" in aarch64
138        };
139
140        // write the jump to branch table into address 0
141        if (!_highestELIs64)
142            physProxy.writeBlob(0x0, jump_to_bl_32, sizeof(jump_to_bl_32));
143        else
144            physProxy.writeBlob(0x0, jump_to_bl_64, sizeof(jump_to_bl_64));
145
146        inform("Using bootloader at address %#x\n", bootldr->entryPoint());
147
148        // Put the address of the boot loader into r7 so we know
149        // where to branch to after the reset fault
150        // All other values needed by the boot loader to know what to do
151        if (!p->gic_cpu_addr || !p->flags_addr)
152            fatal("gic_cpu_addr && flags_addr must be set with bootloader\n");
153
154        for (int i = 0; i < threadContexts.size(); i++) {
155            if (!_highestELIs64)
156                threadContexts[i]->setIntReg(3, (kernelEntry & loadAddrMask) +
157                        loadAddrOffset);
158            threadContexts[i]->setIntReg(4, params()->gic_cpu_addr);
159            threadContexts[i]->setIntReg(5, params()->flags_addr);
160            threadContexts[i]->setIntReg(7, bootldr->entryPoint());
161        }
162        inform("Using kernel entry physical address at %#x\n",
163               (kernelEntry & loadAddrMask) + loadAddrOffset);
164    } else {
165        // Set the initial PC to be at start of the kernel code
166        if (!_highestELIs64)
167            threadContexts[0]->pcState((kernelEntry & loadAddrMask) +
168                    loadAddrOffset);
169    }
170}
171
172bool
173ArmSystem::haveSecurity(ThreadContext *tc)
174{
175    if (!FullSystem)
176        return false;
177
178    ArmSystem *a_sys = dynamic_cast<ArmSystem *>(tc->getSystemPtr());
179    assert(a_sys);
180    return a_sys->haveSecurity();
181}
182
183
184ArmSystem::~ArmSystem()
185{
186    if (debugPrintkEvent)
187        delete debugPrintkEvent;
188}
189
190ObjectFile *
191ArmSystem::getBootLoader(ObjectFile *const obj)
192{
193    for (auto &bl : bootLoaders) {
194        if (bl->getArch() == obj->getArch())
195            return bl.get();
196    }
197
198    return nullptr;
199}
200
201bool
202ArmSystem::haveLPAE(ThreadContext *tc)
203{
204    if (!FullSystem)
205        return false;
206
207    ArmSystem *a_sys = dynamic_cast<ArmSystem *>(tc->getSystemPtr());
208    assert(a_sys);
209    return a_sys->haveLPAE();
210}
211
212bool
213ArmSystem::haveVirtualization(ThreadContext *tc)
214{
215    if (!FullSystem)
216        return false;
217
218    ArmSystem *a_sys = dynamic_cast<ArmSystem *>(tc->getSystemPtr());
219    assert(a_sys);
220    return a_sys->haveVirtualization();
221}
222
223bool
224ArmSystem::highestELIs64(ThreadContext *tc)
225{
226    return FullSystem ?
227        dynamic_cast<ArmSystem *>(tc->getSystemPtr())->highestELIs64() :
228        true;
229}
230
231ExceptionLevel
232ArmSystem::highestEL(ThreadContext *tc)
233{
234    return FullSystem ?
235        dynamic_cast<ArmSystem *>(tc->getSystemPtr())->highestEL() :
236        EL1;
237}
238
239Addr
240ArmSystem::resetAddr64(ThreadContext *tc)
241{
242    return dynamic_cast<ArmSystem *>(tc->getSystemPtr())->resetAddr64();
243}
244
245uint8_t
246ArmSystem::physAddrRange(ThreadContext *tc)
247{
248    return dynamic_cast<ArmSystem *>(tc->getSystemPtr())->physAddrRange();
249}
250
251Addr
252ArmSystem::physAddrMask(ThreadContext *tc)
253{
254    return dynamic_cast<ArmSystem *>(tc->getSystemPtr())->physAddrMask();
255}
256
257bool
258ArmSystem::haveLargeAsid64(ThreadContext *tc)
259{
260    return dynamic_cast<ArmSystem *>(tc->getSystemPtr())->haveLargeAsid64();
261}
262
263ArmSystem *
264ArmSystemParams::create()
265{
266    return new ArmSystem(this);
267}
268
269void
270GenericArmSystem::initState()
271{
272    // Moved from the constructor to here since it relies on the
273    // address map being resolved in the interconnect
274
275    // Call the initialisation of the super class
276    ArmSystem::initState();
277}
278
279GenericArmSystem *
280GenericArmSystemParams::create()
281{
282
283    return new GenericArmSystem(this);
284}
285