summaryrefslogtreecommitdiff
path: root/src/arch/arm/freebsd/system.cc
blob: 95e712e7aac022d9d9f5ec07784ca7781ba147c5 (plain)
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
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
/*
 * Copyright (c) 2015 Ruslan Bukin <br@bsdpad.com>
 * All rights reserved.
 *
 * This software was developed by the University of Cambridge Computer
 * Laboratory as part of the CTSRD Project, with support from the UK Higher
 * Education Innovation Fund (HEIF).
 *
 * 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.
 */

#include "arch/arm/freebsd/system.hh"

#include "arch/arm/isa_traits.hh"
#include "arch/arm/utility.hh"
#include "arch/generic/freebsd/threadinfo.hh"
#include "base/loader/dtb_object.hh"
#include "base/loader/object_file.hh"
#include "base/loader/symtab.hh"
#include "cpu/base.hh"
#include "cpu/pc_event.hh"
#include "cpu/thread_context.hh"
#include "debug/Loader.hh"
#include "kern/freebsd/events.hh"
#include "mem/fs_translating_port_proxy.hh"
#include "mem/physical.hh"
#include "sim/stat_control.hh"

using namespace ArmISA;
using namespace FreeBSD;

FreebsdArmSystem::FreebsdArmSystem(Params *p)
    : GenericArmSystem(p), dumpStatsPCEventF(nullptr),
      enableContextSwitchStatsDump(p->enable_context_switch_stats_dump),
      taskFile(nullptr), kernelPanicEvent(nullptr), kernelOopsEvent(nullptr),
      bootReleaseAddr(p->boot_release_addr)
{
    if (p->panic_on_panic) {
        kernelPanicEvent = addKernelFuncEventOrPanic<PanicPCEvent>(
            "panic", "Kernel panic in simulated kernel");
    } else {
#ifndef NDEBUG
        kernelPanicEvent = addKernelFuncEventOrPanic<BreakPCEvent>("panic");
#endif
    }

    if (p->panic_on_oops) {
        kernelOopsEvent = addKernelFuncEventOrPanic<PanicPCEvent>(
            "oops_exit", "Kernel oops in guest");
    }

    uDelaySkipEvent = addKernelFuncEvent<UDelayEvent>(
        "DELAY", "DELAY", 1000, 0);
}

bool
FreebsdArmSystem::adderBootUncacheable(Addr a)
{

    return false;
}

void
FreebsdArmSystem::initState()
{
    // Moved from the constructor to here since it relies on the
    // address map being resolved in the interconnect

    // Call the initialisation of the super class
    GenericArmSystem::initState();

    // Load symbols at physical address, we might not want
    // to do this permanently, for but early bootup work
    // it is helpful.
    if (params()->early_kernel_symbols) {
        kernel->loadGlobalSymbols(kernelSymtab, loadAddrMask);
        kernel->loadGlobalSymbols(debugSymbolTable, loadAddrMask);
    }

    // Setup boot data structure
    Addr addr = 0;

    // Check if the kernel image has a symbol that tells us it supports
    // device trees.
    bool kernel_has_fdt_support =
        kernelSymtab->findAddress("fdt_get_range", addr);
    bool dtb_file_specified = params()->dtb_filename != "";

    if (!dtb_file_specified)
        fatal("dtb file is not specified\n");

    if (!kernel_has_fdt_support)
        fatal("kernel must have fdt support\n");

    // Kernel supports flattened device tree and dtb file specified.
    // Using Device Tree Blob to describe system configuration.
    inform("Loading DTB file: %s at address %#x\n", params()->dtb_filename,
            params()->atags_addr + loadAddrOffset);

    ObjectFile *dtb_file = createObjectFile(params()->dtb_filename, true);
    if (!dtb_file) {
        fatal("couldn't load DTB file: %s\n", params()->dtb_filename);
    }

    DtbObject *_dtb_file = dynamic_cast<DtbObject*>(dtb_file);

    if (_dtb_file) {
        if (!_dtb_file->addBootCmdLine(params()->boot_osflags.c_str(),
                                       params()->boot_osflags.size())) {
            warn("couldn't append bootargs to DTB file: %s\n",
                 params()->dtb_filename);
        }
    } else {
        warn("dtb_file cast failed; couldn't append bootargs "
             "to DTB file: %s\n", params()->dtb_filename);
    }

    Addr ra = _dtb_file->findReleaseAddr();
    if (ra)
        bootReleaseAddr = ra & ~ULL(0x7F);

    dtb_file->setTextBase(params()->atags_addr + loadAddrOffset);
    dtb_file->loadSections(physProxy);
    delete dtb_file;

    // Kernel boot requirements to set up r0, r1 and r2 in ARMv7
    for (int i = 0; i < threadContexts.size(); i++) {
        threadContexts[i]->setIntReg(0, 0);
        threadContexts[i]->setIntReg(1, params()->machine_type);
        threadContexts[i]->setIntReg(2, params()->atags_addr + loadAddrOffset);
    }
}

FreebsdArmSystem::~FreebsdArmSystem()
{
    if (uDelaySkipEvent)
        delete uDelaySkipEvent;
    if (constUDelaySkipEvent)
        delete constUDelaySkipEvent;

    if (dumpStatsPCEventF)
        delete dumpStatsPCEventF;
}

FreebsdArmSystem *
FreebsdArmSystemParams::create()
{
    return new FreebsdArmSystem(this);
}

void
FreebsdArmSystem::startup()
{
}