1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
|
/*
* Copyright (c) 2010 ARM Limited
* All rights reserved
*
* The license below extends only to copyright in the software and shall
* not be construed as granting a license to any other intellectual
* property including but not limited to intellectual property relating
* to a hardware implementation of the functionality of the software
* licensed hereunder. You may use the software subject to the license
* terms below provided that you ensure that this notice is replicated
* unmodified and in its entirety in all distributions of the software,
* modified or unmodified, in source code or in binary form.
*
* Copyright (c) 2002-2006 The Regents of The University of Michigan
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met: redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer;
* redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution;
* neither the name of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* Authors: Ali Saidi
*/
#include <iostream>
#include "arch/arm/system.hh"
#include "base/loader/object_file.hh"
#include "base/loader/symtab.hh"
#include "cpu/thread_context.hh"
#include "mem/physical.hh"
using namespace std;
using namespace Linux;
ArmSystem::ArmSystem(Params *p)
: System(p), bootldr(NULL)
{
debugPrintkEvent = addKernelFuncEvent<DebugPrintkEvent>("dprintk");
if ((p->boot_loader == "") != (p->boot_loader_mem == NULL))
fatal("If boot_loader is specifed, memory to load it must be also.\n");
if (p->boot_loader != "") {
bootldr = createObjectFile(p->boot_loader);
if (!bootldr)
fatal("Could not read bootloader: %s\n", p->boot_loader);
Port *mem_port;
FunctionalPort fp(name() + "-fport");
mem_port = p->boot_loader_mem->getPort("functional");
fp.setPeer(mem_port);
mem_port->setPeer(&fp);
bootldr->loadSections(&fp);
bootldr->loadGlobalSymbols(debugSymbolTable);
uint8_t jump_to_bl[] =
{
0x07, 0xf0, 0xa0, 0xe1 // branch to r7
};
functionalPort->writeBlob(0x0, jump_to_bl, sizeof(jump_to_bl));
inform("Using bootloader at address %#x\n", bootldr->entryPoint());
}
}
void
ArmSystem::initState()
{
System::initState();
if (bootldr) {
// Put the address of the boot loader into r7 so we know
// where to branch to after the reset fault
// All other values needed by the boot loader to know what to do
for (int i = 0; i < threadContexts.size(); i++) {
threadContexts[i]->setIntReg(3, kernelEntry & loadAddrMask);
threadContexts[i]->setIntReg(4, params()->gic_cpu_addr);
threadContexts[i]->setIntReg(5, params()->flags_addr);
threadContexts[i]->setIntReg(7, bootldr->entryPoint());
}
if (!params()->gic_cpu_addr || !params()->flags_addr)
fatal("gic_cpu_addr && flags_addr must be set with bootloader\n");
} else {
// Set the initial PC to be at start of the kernel code
threadContexts[0]->pcState(kernelEntry & loadAddrMask);
}
for (int i = 0; i < threadContexts.size(); i++) {
if (params()->midr_regval) {
threadContexts[i]->setMiscReg(ArmISA::MISCREG_MIDR,
params()->midr_regval);
}
}
}
ArmSystem::~ArmSystem()
{
if (debugPrintkEvent)
delete debugPrintkEvent;
}
ArmSystem *
ArmSystemParams::create()
{
return new ArmSystem(this);
}
|
