2 * Copyright (c) 2015 Ruslan Bukin <br@bsdpad.com>
5 * This software was developed by the University of Cambridge Computer
6 * Laboratory as part of the CTSRD Project, with support from the UK Higher
7 * Education Innovation Fund (HEIF).
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions are
11 * met: redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer;
13 * redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution;
16 * neither the name of the copyright holders nor the names of its
17 * contributors may be used to endorse or promote products derived from
18 * this software without specific prior written permission.
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
23 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
24 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
25 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
26 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
30 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33 #include "arch/arm/freebsd/system.hh"
35 #include "arch/arm/isa_traits.hh"
36 #include "arch/arm/utility.hh"
37 #include "arch/generic/freebsd/threadinfo.hh"
38 #include "base/loader/dtb_object.hh"
39 #include "base/loader/object_file.hh"
40 #include "base/loader/symtab.hh"
41 #include "cpu/base.hh"
42 #include "cpu/pc_event.hh"
43 #include "cpu/thread_context.hh"
44 #include "debug/Loader.hh"
45 #include "kern/freebsd/events.hh"
46 #include "mem/fs_translating_port_proxy.hh"
47 #include "mem/physical.hh"
48 #include "sim/stat_control.hh"
50 using namespace ArmISA
;
51 using namespace FreeBSD
;
53 FreebsdArmSystem::FreebsdArmSystem(Params
*p
)
54 : GenericArmSystem(p
), dumpStatsPCEventF(nullptr),
55 enableContextSwitchStatsDump(p
->enable_context_switch_stats_dump
),
56 taskFile(nullptr), kernelPanicEvent(nullptr), kernelOopsEvent(nullptr)
58 if (p
->panic_on_panic
) {
59 kernelPanicEvent
= addKernelFuncEventOrPanic
<PanicPCEvent
>(
60 "panic", "Kernel panic in simulated kernel");
63 kernelPanicEvent
= addKernelFuncEventOrPanic
<BreakPCEvent
>("panic");
67 if (p
->panic_on_oops
) {
68 kernelOopsEvent
= addKernelFuncEventOrPanic
<PanicPCEvent
>(
69 "oops_exit", "Kernel oops in guest");
72 uDelaySkipEvent
= addKernelFuncEvent
<UDelayEvent
>(
73 "DELAY", "DELAY", 1000, 0);
77 FreebsdArmSystem::initState()
79 // Moved from the constructor to here since it relies on the
80 // address map being resolved in the interconnect
82 // Call the initialisation of the super class
83 GenericArmSystem::initState();
85 // Load symbols at physical address, we might not want
86 // to do this permanently, for but early bootup work
88 if (params()->early_kernel_symbols
) {
89 kernel
->loadGlobalSymbols(kernelSymtab
, 0, 0, loadAddrMask
);
90 kernel
->loadGlobalSymbols(debugSymbolTable
, 0, 0, loadAddrMask
);
93 // Setup boot data structure
96 // Check if the kernel image has a symbol that tells us it supports
98 bool kernel_has_fdt_support
=
99 kernelSymtab
->findAddress("fdt_get_range", addr
);
100 bool dtb_file_specified
= params()->dtb_filename
!= "";
102 if (!dtb_file_specified
)
103 fatal("dtb file is not specified\n");
105 if (!kernel_has_fdt_support
)
106 fatal("kernel must have fdt support\n");
108 // Kernel supports flattened device tree and dtb file specified.
109 // Using Device Tree Blob to describe system configuration.
110 inform("Loading DTB file: %s at address %#x\n", params()->dtb_filename
,
111 params()->atags_addr
+ loadAddrOffset
);
113 ObjectFile
*dtb_file
= createObjectFile(params()->dtb_filename
, true);
115 fatal("couldn't load DTB file: %s\n", params()->dtb_filename
);
118 DtbObject
*_dtb_file
= dynamic_cast<DtbObject
*>(dtb_file
);
121 if (!_dtb_file
->addBootCmdLine(params()->boot_osflags
.c_str(),
122 params()->boot_osflags
.size())) {
123 warn("couldn't append bootargs to DTB file: %s\n",
124 params()->dtb_filename
);
127 warn("dtb_file cast failed; couldn't append bootargs "
128 "to DTB file: %s\n", params()->dtb_filename
);
131 Addr ra
= _dtb_file
->findReleaseAddr();
133 bootReleaseAddr
= ra
& ~ULL(0x7F);
135 dtb_file
->setTextBase(params()->atags_addr
+ loadAddrOffset
);
136 dtb_file
->loadSections(physProxy
);
139 // Kernel boot requirements to set up r0, r1 and r2 in ARMv7
140 for (int i
= 0; i
< threadContexts
.size(); i
++) {
141 threadContexts
[i
]->setIntReg(0, 0);
142 threadContexts
[i
]->setIntReg(1, params()->machine_type
);
143 threadContexts
[i
]->setIntReg(2, params()->atags_addr
+ loadAddrOffset
);
147 FreebsdArmSystem::~FreebsdArmSystem()
150 delete uDelaySkipEvent
;
151 if (constUDelaySkipEvent
)
152 delete constUDelaySkipEvent
;
154 if (dumpStatsPCEventF
)
155 delete dumpStatsPCEventF
;
159 FreebsdArmSystemParams::create()
161 return new FreebsdArmSystem(this);
165 FreebsdArmSystem::startup()