gem5  v21.1.0.2
fs_workload.cc
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1 /*
2  * Copyright (c) 2015 Ruslan Bukin <br@bsdpad.com>
3  * All rights reserved.
4  *
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).
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32 
34 
35 #include "arch/arm/utility.hh"
37 #include "base/loader/dtb_file.hh"
39 #include "base/loader/symtab.hh"
40 #include "cpu/base.hh"
41 #include "cpu/pc_event.hh"
42 #include "cpu/thread_context.hh"
43 #include "debug/Loader.hh"
44 #include "kern/freebsd/events.hh"
45 #include "mem/physical.hh"
46 #include "sim/stat_control.hh"
47 
48 namespace gem5
49 {
50 
51 using namespace free_bsd;
52 
53 namespace ArmISA
54 {
55 
57  enableContextSwitchStatsDump(p.enable_context_switch_stats_dump)
58 {
59  if (p.panic_on_panic) {
60  kernelPanic = addKernelFuncEventOrPanic<PanicPCEvent>(
61  "panic", "Kernel panic in simulated kernel");
62  } else {
63 #ifndef NDEBUG
64  kernelPanic = addKernelFuncEventOrPanic<BreakPCEvent>("panic");
65 #endif
66  }
67 
68  if (p.panic_on_oops) {
69  kernelOops = addKernelFuncEventOrPanic<PanicPCEvent>(
70  "oops_exit", "Kernel oops in guest");
71  }
72 
73  skipUDelay = addSkipFunc<SkipUDelay>("DELAY", "DELAY", 1000, 0);
74 }
75 
76 void
78 {
80 
81  // Load symbols at physical address, we might not want
82  // to do this permanently, for but early bootup work
83  // it is helpful.
84  if (params().early_kernel_symbols) {
85  auto phys_globals = kernelObj->symtab().globals()->mask(_loadAddrMask);
86  kernelSymtab.insert(*phys_globals);
87  loader::debugSymbolTable.insert(*phys_globals);
88  }
89 
90  // Check if the kernel image has a symbol that tells us it supports
91  // device trees.
92  fatal_if(kernelSymtab.find("fdt_get_range") == kernelSymtab.end(),
93  "Kernel must have fdt support.");
94  fatal_if(params().dtb_filename == "", "dtb file is not specified.");
95 
96  // Kernel supports flattened device tree and dtb file specified.
97  // Using Device Tree Blob to describe system configuration.
98  inform("Loading DTB file: %s at address %#x\n", params().dtb_filename,
99  params().dtb_addr);
100 
101  auto *dtb_file = new loader::DtbFile(params().dtb_filename);
102 
103  warn_if(!dtb_file->addBootCmdLine(commandLine.c_str(), commandLine.size()),
104  "Couldn't append bootargs to DTB file: %s",
105  params().dtb_filename);
106 
107  Addr ra = dtb_file->findReleaseAddr();
108  if (ra)
109  bootReleaseAddr = ra & ~0x7FULL;
110 
111  dtb_file->buildImage().
112  offset(params().dtb_addr).
113  write(system->physProxy);
114  delete dtb_file;
115 
116  // Kernel boot requirements to set up r0, r1 and r2 in ARMv7
117  for (auto *tc: system->threads) {
118  tc->setIntReg(0, 0);
119  tc->setIntReg(1, params().machine_type);
120  tc->setIntReg(2, params().dtb_addr);
121  }
122 }
123 
125 {
126  delete skipUDelay;
127 }
128 
129 } // namespace ArmISA
130 } // namespace gem5
gem5::KernelWorkload::_loadAddrMask
Addr _loadAddrMask
Mask that should be anded for binary/symbol loading.
Definition: kernel_workload.hh:56
gem5::loader::SymbolTable::globals
SymbolTablePtr globals() const
Generates a new symbol table containing only global symbols.
Definition: symtab.hh:267
gem5::ArmISA::FsFreebsd::bootReleaseAddr
Addr bootReleaseAddr
Definition: fs_workload.hh:100
gem5::ArmISA::FsWorkload
Definition: fs_workload.hh:68
gem5::System::physProxy
PortProxy physProxy
Port to physical memory used for writing object files into ram at boot.
Definition: system.hh:332
gem5::KernelWorkload::commandLine
const std::string commandLine
Definition: kernel_workload.hh:74
gem5::loader::SymbolTable::end
const_iterator end() const
Definition: symtab.hh:176
events.hh
gem5::ArmISA::FsFreebsd::FsFreebsd
FsFreebsd(const Params &p)
Definition: fs_workload.cc:56
dtb_file.hh
gem5::loader::ObjectFile::symtab
const SymbolTable & symtab() const
Definition: object_file.hh:119
gem5::KernelWorkload::kernelObj
loader::ObjectFile * kernelObj
Definition: kernel_workload.hh:69
fs_workload.hh
gem5::SimObject::Params
SimObjectParams Params
Definition: sim_object.hh:170
gem5::SimObject::params
const Params & params() const
Definition: sim_object.hh:176
gem5::PowerISA::ra
Bitfield< 20, 16 > ra
Definition: types.hh:50
gem5::ArmISA::FsFreebsd::~FsFreebsd
~FsFreebsd()
Definition: fs_workload.cc:124
gem5::MipsISA::p
Bitfield< 0 > p
Definition: pra_constants.hh:326
gem5::ArmISA::FsFreebsd::kernelOops
PCEvent * kernelOops
Event to halt the simulator if the kernel calls oopses
Definition: fs_workload.hh:82
gem5::ArmISA::offset
Bitfield< 23, 0 > offset
Definition: types.hh:144
gem5::KernelWorkload::kernelSymtab
loader::SymbolTable kernelSymtab
Definition: kernel_workload.hh:72
gem5::ArmISA::FsFreebsd::kernelPanic
PCEvent * kernelPanic
Event to halt the simulator if the kernel calls panic()
Definition: fs_workload.hh:79
gem5::Addr
uint64_t Addr
Address type This will probably be moved somewhere else in the near future.
Definition: types.hh:147
utility.hh
stat_control.hh
gem5::loader::SymbolTable::find
const_iterator find(Addr address) const
Search for a symbol by its address.
Definition: symtab.hh:322
warn_if
#define warn_if(cond,...)
Conditional warning macro that checks the supplied condition and only prints a warning if the conditi...
Definition: logging.hh:272
gem5::ArmISA::FsFreebsd::initState
void initState() override
initState() is called on each SimObject when not restoring from a checkpoint.
Definition: fs_workload.cc:77
inform
#define inform(...)
Definition: logging.hh:246
gem5::loader::SymbolTable::insert
bool insert(const Symbol &symbol)
Insert a new symbol in the table if it does not already exist.
Definition: symtab.cc:55
base.hh
pc_event.hh
gem5::System::threads
Threads threads
Definition: system.hh:316
physical.hh
gem5::ArmISA::FsWorkload::initState
void initState() override
initState() is called on each SimObject when not restoring from a checkpoint.
Definition: fs_workload.cc:101
gem5::Workload::system
System * system
Definition: workload.hh:78
symtab.hh
gem5::loader::debugSymbolTable
SymbolTable debugSymbolTable
Global unified debugging symbol table (for target).
Definition: symtab.cc:44
threadinfo.hh
gem5::ArmISA::FsFreebsd::skipUDelay
PCEvent * skipUDelay
PC based event to skip udelay(<time>) calls and quiesce the processor for the appropriate amount of t...
Definition: fs_workload.hh:89
fatal_if
#define fatal_if(cond,...)
Conditional fatal macro that checks the supplied condition and only causes a fatal error if the condi...
Definition: logging.hh:225
gem5
Reference material can be found at the JEDEC website: UFS standard http://www.jedec....
Definition: decoder.cc:40
object_file.hh
thread_context.hh
gem5::loader::DtbFile
Definition: dtb_file.hh:47

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