2 * Copyright (c) 2010 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
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26 * this software without specific prior written permission.
28 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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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"
53 using namespace Linux
;
55 ArmSystem::ArmSystem(Params
*p
)
56 : System(p
), bootldr(NULL
), multiProc(p
->multi_proc
)
58 if (p
->boot_loader
!= "") {
59 bootldr
= createObjectFile(p
->boot_loader
);
62 fatal("Could not read bootloader: %s\n", p
->boot_loader
);
64 bootldr
->loadGlobalSymbols(debugSymbolTable
);
67 debugPrintkEvent
= addKernelFuncEvent
<DebugPrintkEvent
>("dprintk");
71 ArmSystem::initState()
73 // Moved from the constructor to here since it relies on the
74 // address map being resolved in the interconnect
76 // Call the initialisation of the super class
79 const Params
* p
= params();
82 bootldr
->loadSections(physProxy
);
84 uint8_t jump_to_bl
[] =
86 0x07, 0xf0, 0xa0, 0xe1 // branch to r7
88 physProxy
.writeBlob(0x0, jump_to_bl
, sizeof(jump_to_bl
));
90 inform("Using bootloader at address %#x\n", bootldr
->entryPoint());
92 // Put the address of the boot loader into r7 so we know
93 // where to branch to after the reset fault
94 // All other values needed by the boot loader to know what to do
95 if (!p
->gic_cpu_addr
|| !p
->flags_addr
)
96 fatal("gic_cpu_addr && flags_addr must be set with bootloader\n");
98 for (int i
= 0; i
< threadContexts
.size(); i
++) {
99 threadContexts
[i
]->setIntReg(3, kernelEntry
& loadAddrMask
);
100 threadContexts
[i
]->setIntReg(4, params()->gic_cpu_addr
);
101 threadContexts
[i
]->setIntReg(5, params()->flags_addr
);
102 threadContexts
[i
]->setIntReg(7, bootldr
->entryPoint());
105 // Set the initial PC to be at start of the kernel code
106 threadContexts
[0]->pcState(kernelEntry
& loadAddrMask
);
110 ArmSystem::~ArmSystem()
112 if (debugPrintkEvent
)
113 delete debugPrintkEvent
;
118 ArmSystemParams::create()
120 return new ArmSystem(this);