2 * Copyright (c) 2010, 2012-2013 ARM Limited
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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
)
57 : System(p
), bootldr(NULL
), _haveSecurity(p
->have_security
),
58 _haveLPAE(p
->have_lpae
),
59 _haveVirtualization(p
->have_virtualization
),
60 _haveGenericTimer(p
->have_generic_timer
),
61 _highestELIs64(p
->highest_el_is_64
),
62 _resetAddr64(p
->reset_addr_64
),
63 _physAddrRange64(p
->phys_addr_range_64
),
64 _haveLargeAsid64(p
->have_large_asid_64
),
65 multiProc(p
->multi_proc
)
67 // Check if the physical address range is valid
68 if (_highestELIs64
&& (
69 _physAddrRange64
< 32 ||
70 _physAddrRange64
> 48 ||
71 (_physAddrRange64
% 4 != 0 && _physAddrRange64
!= 42))) {
72 fatal("Invalid physical address range (%d)\n", _physAddrRange64
);
75 if (p
->boot_loader
!= "") {
76 bootldr
= createObjectFile(p
->boot_loader
);
79 fatal("Could not read bootloader: %s\n", p
->boot_loader
);
81 if ((bootldr
->getArch() == ObjectFile::Arm64
) && !_highestELIs64
) {
82 warn("Highest ARM exception-level set to AArch32 but bootloader "
83 "is for AArch64. Assuming you wanted these to match.\n");
84 _highestELIs64
= true;
85 } else if ((bootldr
->getArch() == ObjectFile::Arm
) && _highestELIs64
) {
86 warn("Highest ARM exception-level set to AArch64 but bootloader "
87 "is for AArch32. Assuming you wanted these to match.\n");
88 _highestELIs64
= false;
91 bootldr
->loadGlobalSymbols(debugSymbolTable
);
94 debugPrintkEvent
= addKernelFuncEvent
<DebugPrintkEvent
>("dprintk");
98 ArmSystem::initState()
100 // Moved from the constructor to here since it relies on the
101 // address map being resolved in the interconnect
103 // Call the initialisation of the super class
106 const Params
* p
= params();
109 bootldr
->loadSections(physProxy
);
111 uint8_t jump_to_bl_32
[] =
113 0x07, 0xf0, 0xa0, 0xe1 // branch to r7 in aarch32
116 uint8_t jump_to_bl_64
[] =
118 0xe0, 0x00, 0x1f, 0xd6 // instruction "br x7" in aarch64
121 // write the jump to branch table into address 0
123 physProxy
.writeBlob(0x0, jump_to_bl_32
, sizeof(jump_to_bl_32
));
125 physProxy
.writeBlob(0x0, jump_to_bl_64
, sizeof(jump_to_bl_64
));
127 inform("Using bootloader at address %#x\n", bootldr
->entryPoint());
129 // Put the address of the boot loader into r7 so we know
130 // where to branch to after the reset fault
131 // All other values needed by the boot loader to know what to do
132 if (!p
->gic_cpu_addr
|| !p
->flags_addr
)
133 fatal("gic_cpu_addr && flags_addr must be set with bootloader\n");
135 for (int i
= 0; i
< threadContexts
.size(); i
++) {
137 threadContexts
[i
]->setIntReg(3, (kernelEntry
& loadAddrMask
) +
139 threadContexts
[i
]->setIntReg(4, params()->gic_cpu_addr
);
140 threadContexts
[i
]->setIntReg(5, params()->flags_addr
);
141 threadContexts
[i
]->setIntReg(7, bootldr
->entryPoint());
143 inform("Using kernel entry physical address at %#x\n",
144 (kernelEntry
& loadAddrMask
) + loadAddrOffset
);
146 // Set the initial PC to be at start of the kernel code
148 threadContexts
[0]->pcState((kernelEntry
& loadAddrMask
) +
153 GenericTimer::ArchTimer
*
154 ArmSystem::getArchTimer(int cpu_id
) const
157 return _genericTimer
->getArchTimer(cpu_id
);
162 GenericTimer::SystemCounter
*
163 ArmSystem::getSystemCounter() const
166 return _genericTimer
->getSystemCounter();
172 ArmSystem::haveSecurity(ThreadContext
*tc
)
177 ArmSystem
*a_sys
= dynamic_cast<ArmSystem
*>(tc
->getSystemPtr());
179 return a_sys
->haveSecurity();
183 ArmSystem::~ArmSystem()
185 if (debugPrintkEvent
)
186 delete debugPrintkEvent
;
190 ArmSystem::haveLPAE(ThreadContext
*tc
)
195 ArmSystem
*a_sys
= dynamic_cast<ArmSystem
*>(tc
->getSystemPtr());
197 return a_sys
->haveLPAE();
201 ArmSystem::haveVirtualization(ThreadContext
*tc
)
206 ArmSystem
*a_sys
= dynamic_cast<ArmSystem
*>(tc
->getSystemPtr());
208 return a_sys
->haveVirtualization();
212 ArmSystem::highestELIs64(ThreadContext
*tc
)
214 return dynamic_cast<ArmSystem
*>(tc
->getSystemPtr())->highestELIs64();
218 ArmSystem::highestEL(ThreadContext
*tc
)
220 return dynamic_cast<ArmSystem
*>(tc
->getSystemPtr())->highestEL();
224 ArmSystem::resetAddr64(ThreadContext
*tc
)
226 return dynamic_cast<ArmSystem
*>(tc
->getSystemPtr())->resetAddr64();
230 ArmSystem::physAddrRange(ThreadContext
*tc
)
232 return dynamic_cast<ArmSystem
*>(tc
->getSystemPtr())->physAddrRange();
236 ArmSystem::physAddrMask(ThreadContext
*tc
)
238 return dynamic_cast<ArmSystem
*>(tc
->getSystemPtr())->physAddrMask();
242 ArmSystem::haveLargeAsid64(ThreadContext
*tc
)
244 return dynamic_cast<ArmSystem
*>(tc
->getSystemPtr())->haveLargeAsid64();
247 ArmSystemParams::create()
249 return new ArmSystem(this);