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
22 * notice, this list of conditions and the following disclaimer in the
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24 * neither the name of the copyright holders nor the names of its
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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
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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"
52 using namespace Linux
;
54 ArmSystem::ArmSystem(Params
*p
)
55 : System(p
), bootldr(NULL
)
57 debugPrintkEvent
= addKernelFuncEvent
<DebugPrintkEvent
>("dprintk");
59 if ((p
->boot_loader
== "") != (p
->boot_loader_mem
== NULL
))
60 fatal("If boot_loader is specifed, memory to load it must be also.\n");
62 if (p
->boot_loader
!= "") {
63 bootldr
= createObjectFile(p
->boot_loader
);
66 fatal("Could not read bootloader: %s\n", p
->boot_loader
);
69 FunctionalPort
fp(name() + "-fport");
70 mem_port
= p
->boot_loader_mem
->getPort("functional");
72 mem_port
->setPeer(&fp
);
74 bootldr
->loadSections(&fp
);
75 bootldr
->loadGlobalSymbols(debugSymbolTable
);
77 uint8_t jump_to_bl
[] =
79 0x07, 0xf0, 0xa0, 0xe1 // branch to r7
81 functionalPort
->writeBlob(0x0, jump_to_bl
, sizeof(jump_to_bl
));
83 inform("Using bootloader at address %#x\n", bootldr
->entryPoint());
88 ArmSystem::initState()
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 for (int i
= 0; i
< threadContexts
.size(); i
++) {
96 threadContexts
[i
]->setIntReg(3, kernelEntry
& loadAddrMask
);
97 threadContexts
[i
]->setIntReg(4, params()->gic_cpu_addr
);
98 threadContexts
[i
]->setIntReg(5, params()->flags_addr
);
99 threadContexts
[i
]->setIntReg(7, bootldr
->entryPoint());
101 if (!params()->gic_cpu_addr
|| !params()->flags_addr
)
102 fatal("gic_cpu_addr && flags_addr must be set with bootloader\n");
104 // Set the initial PC to be at start of the kernel code
105 threadContexts
[0]->pcState(kernelEntry
& loadAddrMask
);
109 ArmSystem::~ArmSystem()
111 if (debugPrintkEvent
)
112 delete debugPrintkEvent
;
117 ArmSystemParams::create()
119 return new ArmSystem(this);