2 * Copyright (c) 2010, 2012-2013, 2015 ARM Limited
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.
14 * Copyright (c) 2002-2006 The Regents of The University of Michigan
15 * All rights reserved.
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.
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.
45 #include "arch/arm/system.hh"
46 #include "base/loader/object_file.hh"
47 #include "base/loader/symtab.hh"
48 #include "cpu/thread_context.hh"
49 #include "mem/physical.hh"
50 #include "mem/fs_translating_port_proxy.hh"
51 #include "sim/full_system.hh"
54 using namespace Linux
;
56 ArmSystem::ArmSystem(Params
*p
)
58 bootLoaders(), bootldr(nullptr),
59 _haveSecurity(p
->have_security
),
60 _haveLPAE(p
->have_lpae
),
61 _haveVirtualization(p
->have_virtualization
),
62 _genericTimer(nullptr),
63 _highestELIs64(p
->highest_el_is_64
),
64 _resetAddr64(p
->reset_addr_64
),
65 _physAddrRange64(p
->phys_addr_range_64
),
66 _haveLargeAsid64(p
->have_large_asid_64
),
67 multiProc(p
->multi_proc
)
69 // Check if the physical address range is valid
70 if (_highestELIs64
&& (
71 _physAddrRange64
< 32 ||
72 _physAddrRange64
> 48 ||
73 (_physAddrRange64
% 4 != 0 && _physAddrRange64
!= 42))) {
74 fatal("Invalid physical address range (%d)\n", _physAddrRange64
);
77 bootLoaders
.reserve(p
->boot_loader
.size());
78 for (const auto &bl
: p
->boot_loader
) {
79 std::unique_ptr
<ObjectFile
> obj
;
80 obj
.reset(createObjectFile(bl
));
82 fatal_if(!obj
, "Could not read bootloader: %s\n", bl
);
83 bootLoaders
.emplace_back(std::move(obj
));
87 bootldr
= getBootLoader(kernel
);
88 } else if (!bootLoaders
.empty()) {
89 // No kernel specified, default to the first boot loader
90 bootldr
= bootLoaders
[0].get();
93 if (!bootLoaders
.empty() && !bootldr
)
94 fatal("Can't find a matching boot loader / kernel combination!");
97 bootldr
->loadGlobalSymbols(debugSymbolTable
);
98 if ((bootldr
->getArch() == ObjectFile::Arm64
) && !_highestELIs64
) {
99 warn("Highest ARM exception-level set to AArch32 but bootloader "
100 "is for AArch64. Assuming you wanted these to match.\n");
101 _highestELIs64
= true;
102 } else if ((bootldr
->getArch() == ObjectFile::Arm
) && _highestELIs64
) {
103 warn("Highest ARM exception-level set to AArch64 but bootloader "
104 "is for AArch32. Assuming you wanted these to match.\n");
105 _highestELIs64
= false;
109 debugPrintkEvent
= addKernelFuncEvent
<DebugPrintkEvent
>("dprintk");
113 ArmSystem::initState()
115 // Moved from the constructor to here since it relies on the
116 // address map being resolved in the interconnect
118 // Call the initialisation of the super class
121 const Params
* p
= params();
124 bootldr
->loadSections(physProxy
);
126 uint8_t jump_to_bl_32
[] =
128 0x07, 0xf0, 0xa0, 0xe1 // branch to r7 in aarch32
131 uint8_t jump_to_bl_64
[] =
133 0xe0, 0x00, 0x1f, 0xd6 // instruction "br x7" in aarch64
136 // write the jump to branch table into address 0
138 physProxy
.writeBlob(0x0, jump_to_bl_32
, sizeof(jump_to_bl_32
));
140 physProxy
.writeBlob(0x0, jump_to_bl_64
, sizeof(jump_to_bl_64
));
142 inform("Using bootloader at address %#x\n", bootldr
->entryPoint());
144 // Put the address of the boot loader into r7 so we know
145 // where to branch to after the reset fault
146 // All other values needed by the boot loader to know what to do
147 if (!p
->gic_cpu_addr
|| !p
->flags_addr
)
148 fatal("gic_cpu_addr && flags_addr must be set with bootloader\n");
150 for (int i
= 0; i
< threadContexts
.size(); i
++) {
152 threadContexts
[i
]->setIntReg(3, (kernelEntry
& loadAddrMask
) +
154 threadContexts
[i
]->setIntReg(4, params()->gic_cpu_addr
);
155 threadContexts
[i
]->setIntReg(5, params()->flags_addr
);
156 threadContexts
[i
]->setIntReg(7, bootldr
->entryPoint());
158 inform("Using kernel entry physical address at %#x\n",
159 (kernelEntry
& loadAddrMask
) + loadAddrOffset
);
161 // Set the initial PC to be at start of the kernel code
163 threadContexts
[0]->pcState((kernelEntry
& loadAddrMask
) +
169 ArmSystem::haveSecurity(ThreadContext
*tc
)
174 ArmSystem
*a_sys
= dynamic_cast<ArmSystem
*>(tc
->getSystemPtr());
176 return a_sys
->haveSecurity();
180 ArmSystem::~ArmSystem()
182 if (debugPrintkEvent
)
183 delete debugPrintkEvent
;
187 ArmSystem::getBootLoader(ObjectFile
*const obj
)
189 for (auto &bl
: bootLoaders
) {
190 if (bl
->getArch() == obj
->getArch())
198 ArmSystem::haveLPAE(ThreadContext
*tc
)
203 ArmSystem
*a_sys
= dynamic_cast<ArmSystem
*>(tc
->getSystemPtr());
205 return a_sys
->haveLPAE();
209 ArmSystem::haveVirtualization(ThreadContext
*tc
)
214 ArmSystem
*a_sys
= dynamic_cast<ArmSystem
*>(tc
->getSystemPtr());
216 return a_sys
->haveVirtualization();
220 ArmSystem::highestELIs64(ThreadContext
*tc
)
222 return dynamic_cast<ArmSystem
*>(tc
->getSystemPtr())->highestELIs64();
226 ArmSystem::highestEL(ThreadContext
*tc
)
228 return dynamic_cast<ArmSystem
*>(tc
->getSystemPtr())->highestEL();
232 ArmSystem::resetAddr64(ThreadContext
*tc
)
234 return dynamic_cast<ArmSystem
*>(tc
->getSystemPtr())->resetAddr64();
238 ArmSystem::physAddrRange(ThreadContext
*tc
)
240 return dynamic_cast<ArmSystem
*>(tc
->getSystemPtr())->physAddrRange();
244 ArmSystem::physAddrMask(ThreadContext
*tc
)
246 return dynamic_cast<ArmSystem
*>(tc
->getSystemPtr())->physAddrMask();
250 ArmSystem::haveLargeAsid64(ThreadContext
*tc
)
252 return dynamic_cast<ArmSystem
*>(tc
->getSystemPtr())->haveLargeAsid64();
256 ArmSystemParams::create()
258 return new ArmSystem(this);
262 GenericArmSystem::initState()
264 // Moved from the constructor to here since it relies on the
265 // address map being resolved in the interconnect
267 // Call the initialisation of the super class
268 ArmSystem::initState();
272 GenericArmSystemParams::create()
275 return new GenericArmSystem(this);