gem5/sim/process.cc
Nathan Binkert 5eab6c4b41 Make the notion of a global event tick independent of the actual
CPU cycle ticks.  This allows the user to have CPUs of different
frequencies, and also allows frequencies and latencies that are
not evenly divisible by the CPU frequency.  For now, the CPU
frequency is still set to the global frequency, but soon, we'll
hopefully make the global frequency fixed at something like 1THz
and set all other frequencies independently.

arch/alpha/ev5.cc:
    The cycles counter is based on the current cpu cycle.
cpu/base_cpu.cc:
    frequency isn't the cpu parameter anymore, cycleTime is.
cpu/base_cpu.hh:
    frequency isn't the cpu parameter anymore, cycleTime is.
    create several public functions for getting the cpu frequency
    and the numbers of ticks for a given number of cycles, etc.
cpu/memtest/memtest.cc:
cpu/simple_cpu/simple_cpu.cc:
cpu/simple_cpu/simple_cpu.hh:
cpu/trace/trace_cpu.cc:
    Now that ticks aren't cpu cycles, fixup code to advance
    by the proper number of ticks.
cpu/memtest/memtest.hh:
cpu/trace/trace_cpu.hh:
    Provide a function to get the number of ticks for a given
    number of cycles.
dev/alpha_console.cc:
    Update for changes in the way that frequencies and latencies are
    accessed.  Move some stuff to init()
dev/alpha_console.hh:
    Need a pointer to the system and the cpu to get the frequency
    so we can pass the info to the console code.
dev/etherbus.cc:
dev/etherbus.hh:
dev/etherlink.cc:
dev/etherlink.hh:
dev/ethertap.cc:
dev/ide_disk.hh:
dev/ns_gige.cc:
dev/ns_gige.hh:
    update for changes in the way bandwidths are passed from
    python to C++ to accomidate the new way that ticks works.
dev/ide_disk.cc:
    update for changes in the way bandwidths are passed from
    python to C++ to accomidate the new way that ticks works.
    Add some extra debugging printfs
dev/platform.cc:
dev/sinic.cc:
dev/sinic.hh:
    outline the constructor and destructor
dev/platform.hh:
    outline the constructor and destructor.
    don't keep track of the interrupt frequency.  Only provide the
    accessor function.
dev/tsunami.cc:
dev/tsunami.hh:
    outline the constructor and destructor
    Don't set the interrupt frequency here.  Get it from the actual device
    that does the interrupting.
dev/tsunami_io.cc:
dev/tsunami_io.hh:
    Make the interrupt interval a configuration parameter.  (And convert
    the interval to the new latency/frequency stuff in the python)
kern/linux/linux_system.cc:
    update for changes in the way bandwidths are passed from
    python to C++ to accomidate the new way that ticks works.
    For now, we must get the boot cpu's frequency as a parameter
    since allowing the system to have a pointer to the boot cpu would
    cause a cycle.
kern/tru64/tru64_system.cc:
    For now, we must get the boot cpu's frequency as a parameter
    since allowing the system to have a pointer to the boot cpu would
    cause a cycle.
python/m5/config.py:
    Fix support for cycle_time relative latencies and frequencies.
    Add support for getting a NetworkBandwidth or a MemoryBandwidth.
python/m5/objects/BaseCPU.mpy:
    All CPUs now have a cycle_time.  The default is the global frequency,
    but it is now possible to set the global frequency to some large value
    (like 1THz) and set each CPU frequency independently.
python/m5/objects/BaseCache.mpy:
python/m5/objects/Ide.mpy:
    Make this a Latency parameter
python/m5/objects/BaseSystem.mpy:
    We need to pass the boot CPU's frequency to the system
python/m5/objects/Ethernet.mpy:
    Update parameter types to use latency and bandwidth types
python/m5/objects/Platform.mpy:
    this frequency isn't needed.  We get it from the clock interrupt.
python/m5/objects/Tsunami.mpy:
    The clock generator should hold the frequency
sim/eventq.hh:
    Need to remove this assertion because the writeback event
    queue is different from the CPU's event queue which can cause
    this assertion to fail.
sim/process.cc:
    Fix comment.
sim/system.hh:
    Struct member to hold the boot CPU's frequency.
sim/universe.cc:
    remove unneeded variable.

--HG--
extra : convert_revision : 51efe4041095234bf458d9b3b0d417f4cae16fdc
2005-04-11 15:32:06 -04:00

430 lines
12 KiB
C++

/*
* Copyright (c) 2001-2004 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.
*/
#include <unistd.h>
#include <fcntl.h>
#include <cstdio>
#include <string>
#include "base/intmath.hh"
#include "base/loader/object_file.hh"
#include "base/loader/symtab.hh"
#include "base/statistics.hh"
#include "cpu/exec_context.hh"
#include "cpu/full_cpu/smt.hh"
#include "cpu/full_cpu/thread.hh"
#include "eio/eio.hh"
#include "mem/functional_mem/main_memory.hh"
#include "sim/builder.hh"
#include "sim/fake_syscall.hh"
#include "sim/process.hh"
#include "sim/stats.hh"
#ifdef TARGET_ALPHA
#include "arch/alpha/alpha_tru64_process.hh"
#include "arch/alpha/alpha_linux_process.hh"
#endif
using namespace std;
//
// The purpose of this code is to fake the loader & syscall mechanism
// when there's no OS: thus there's no resone to use it in FULL_SYSTEM
// mode when we do have an OS
//
#ifdef FULL_SYSTEM
#error "process.cc not compatible with FULL_SYSTEM"
#endif
// current number of allocated processes
int num_processes = 0;
Process::Process(const string &nm,
int stdin_fd, // initial I/O descriptors
int stdout_fd,
int stderr_fd)
: SimObject(nm)
{
// allocate memory space
memory = new MainMemory(nm + ".MainMem");
// allocate initial register file
init_regs = new RegFile;
memset(init_regs, 0, sizeof(RegFile));
// initialize first 3 fds (stdin, stdout, stderr)
fd_map[STDIN_FILENO] = stdin_fd;
fd_map[STDOUT_FILENO] = stdout_fd;
fd_map[STDERR_FILENO] = stderr_fd;
// mark remaining fds as free
for (int i = 3; i <= MAX_FD; ++i) {
fd_map[i] = -1;
}
mmap_start = mmap_end = 0;
nxm_start = nxm_end = 0;
// other parameters will be initialized when the program is loaded
}
void
Process::regStats()
{
using namespace Stats;
num_syscalls
.name(name() + ".PROG:num_syscalls")
.desc("Number of system calls")
;
}
//
// static helper functions
//
int
Process::openInputFile(const string &filename)
{
int fd = open(filename.c_str(), O_RDONLY);
if (fd == -1) {
perror(NULL);
cerr << "unable to open \"" << filename << "\" for reading\n";
fatal("can't open input file");
}
return fd;
}
int
Process::openOutputFile(const string &filename)
{
int fd = open(filename.c_str(), O_WRONLY | O_CREAT | O_TRUNC, 0774);
if (fd == -1) {
perror(NULL);
cerr << "unable to open \"" << filename << "\" for writing\n";
fatal("can't open output file");
}
return fd;
}
int
Process::registerExecContext(ExecContext *xc)
{
// add to list
int myIndex = execContexts.size();
execContexts.push_back(xc);
if (myIndex == 0) {
// copy process's initial regs struct
xc->regs = *init_regs;
}
// return CPU number to caller and increment available CPU count
return myIndex;
}
void
Process::startup()
{
if (execContexts.empty())
return;
// first exec context for this process... initialize & enable
ExecContext *xc = execContexts[0];
// mark this context as active so it will start ticking.
xc->activate(0);
}
void
Process::replaceExecContext(ExecContext *xc, int xcIndex)
{
if (xcIndex >= execContexts.size()) {
panic("replaceExecContext: bad xcIndex, %d >= %d\n",
xcIndex, execContexts.size());
}
execContexts[xcIndex] = xc;
}
// map simulator fd sim_fd to target fd tgt_fd
void
Process::dup_fd(int sim_fd, int tgt_fd)
{
if (tgt_fd < 0 || tgt_fd > MAX_FD)
panic("Process::dup_fd tried to dup past MAX_FD (%d)", tgt_fd);
fd_map[tgt_fd] = sim_fd;
}
// generate new target fd for sim_fd
int
Process::open_fd(int sim_fd)
{
int free_fd;
// in case open() returns an error, don't allocate a new fd
if (sim_fd == -1)
return -1;
// find first free target fd
for (free_fd = 0; fd_map[free_fd] >= 0; ++free_fd) {
if (free_fd == MAX_FD)
panic("Process::open_fd: out of file descriptors!");
}
fd_map[free_fd] = sim_fd;
return free_fd;
}
// look up simulator fd for given target fd
int
Process::sim_fd(int tgt_fd)
{
if (tgt_fd > MAX_FD)
return -1;
return fd_map[tgt_fd];
}
//
// need to declare these here since there is no concrete Process type
// that can be constructed (i.e., no REGISTER_SIM_OBJECT() macro call,
// which is where these get declared for concrete types).
//
DEFINE_SIM_OBJECT_CLASS_NAME("Process", Process)
////////////////////////////////////////////////////////////////////////
//
// LiveProcess member definitions
//
////////////////////////////////////////////////////////////////////////
static void
copyStringArray(vector<string> &strings, Addr array_ptr, Addr data_ptr,
FunctionalMemory *memory)
{
for (int i = 0; i < strings.size(); ++i) {
memory->access(Write, array_ptr, &data_ptr, sizeof(Addr));
memory->writeString(data_ptr, strings[i].c_str());
array_ptr += sizeof(Addr);
data_ptr += strings[i].size() + 1;
}
// add NULL terminator
data_ptr = 0;
memory->access(Write, array_ptr, &data_ptr, sizeof(Addr));
}
LiveProcess::LiveProcess(const string &nm, ObjectFile *objFile,
int stdin_fd, int stdout_fd, int stderr_fd,
vector<string> &argv, vector<string> &envp)
: Process(nm, stdin_fd, stdout_fd, stderr_fd)
{
prog_fname = argv[0];
prog_entry = objFile->entryPoint();
text_base = objFile->textBase();
text_size = objFile->textSize();
data_base = objFile->dataBase();
data_size = objFile->dataSize() + objFile->bssSize();
brk_point = RoundUp<uint64_t>(data_base + data_size, VMPageSize);
// load object file into target memory
objFile->loadSections(memory);
// load up symbols, if any... these may be used for debugging or
// profiling.
if (!debugSymbolTable) {
debugSymbolTable = new SymbolTable();
if (!objFile->loadGlobalSymbols(debugSymbolTable) ||
!objFile->loadLocalSymbols(debugSymbolTable)) {
// didn't load any symbols
delete debugSymbolTable;
debugSymbolTable = NULL;
}
}
// Set up stack. On Alpha, stack goes below text section. This
// code should get moved to some architecture-specific spot.
stack_base = text_base - (409600+4096);
// Set up region for mmaps. Tru64 seems to start just above 0 and
// grow up from there.
mmap_start = mmap_end = 0x10000;
// Set pointer for next thread stack. Reserve 8M for main stack.
next_thread_stack_base = stack_base - (8 * 1024 * 1024);
// Calculate how much space we need for arg & env arrays.
int argv_array_size = sizeof(Addr) * (argv.size() + 1);
int envp_array_size = sizeof(Addr) * (envp.size() + 1);
int arg_data_size = 0;
for (int i = 0; i < argv.size(); ++i) {
arg_data_size += argv[i].size() + 1;
}
int env_data_size = 0;
for (int i = 0; i < envp.size(); ++i) {
env_data_size += envp[i].size() + 1;
}
int space_needed =
argv_array_size + envp_array_size + arg_data_size + env_data_size;
// for SimpleScalar compatibility
if (space_needed < 16384)
space_needed = 16384;
// set bottom of stack
stack_min = stack_base - space_needed;
// align it
stack_min &= ~7;
stack_size = stack_base - stack_min;
// map out initial stack contents
Addr argv_array_base = stack_min + sizeof(uint64_t); // room for argc
Addr envp_array_base = argv_array_base + argv_array_size;
Addr arg_data_base = envp_array_base + envp_array_size;
Addr env_data_base = arg_data_base + arg_data_size;
// write contents to stack
uint64_t argc = argv.size();
memory->access(Write, stack_min, &argc, sizeof(uint64_t));
copyStringArray(argv, argv_array_base, arg_data_base, memory);
copyStringArray(envp, envp_array_base, env_data_base, memory);
init_regs->intRegFile[ArgumentReg0] = argc;
init_regs->intRegFile[ArgumentReg1] = argv_array_base;
init_regs->intRegFile[StackPointerReg] = stack_min;
init_regs->intRegFile[GlobalPointerReg] = objFile->globalPointer();
init_regs->pc = prog_entry;
init_regs->npc = prog_entry + sizeof(MachInst);
}
LiveProcess *
LiveProcess::create(const string &nm,
int stdin_fd, int stdout_fd, int stderr_fd,
vector<string> &argv, vector<string> &envp)
{
LiveProcess *process = NULL;
ObjectFile *objFile = createObjectFile(argv[0]);
if (objFile == NULL) {
fatal("Can't load object file %s", argv[0]);
}
// check object type & set up syscall emulation pointer
if (objFile->getArch() == ObjectFile::Alpha) {
switch (objFile->getOpSys()) {
case ObjectFile::Tru64:
process = new AlphaTru64Process(nm, objFile,
stdin_fd, stdout_fd, stderr_fd,
argv, envp);
break;
case ObjectFile::Linux:
process = new AlphaLinuxProcess(nm, objFile,
stdin_fd, stdout_fd, stderr_fd,
argv, envp);
break;
default:
fatal("Unknown/unsupported operating system.");
}
} else {
fatal("Unknown object file architecture.");
}
delete objFile;
if (process == NULL)
fatal("Unknown error creating process object.");
return process;
}
BEGIN_DECLARE_SIM_OBJECT_PARAMS(LiveProcess)
VectorParam<string> cmd;
Param<string> input;
Param<string> output;
VectorParam<string> env;
END_DECLARE_SIM_OBJECT_PARAMS(LiveProcess)
BEGIN_INIT_SIM_OBJECT_PARAMS(LiveProcess)
INIT_PARAM(cmd, "command line (executable plus arguments)"),
INIT_PARAM(input, "filename for stdin (dflt: use sim stdin)"),
INIT_PARAM(output, "filename for stdout/stderr (dflt: use sim stdout)"),
INIT_PARAM(env, "environment settings")
END_INIT_SIM_OBJECT_PARAMS(LiveProcess)
CREATE_SIM_OBJECT(LiveProcess)
{
string in = input;
string out = output;
// initialize file descriptors to default: same as simulator
int stdin_fd, stdout_fd, stderr_fd;
if (in == "stdin" || in == "cin")
stdin_fd = STDIN_FILENO;
else
stdin_fd = Process::openInputFile(input);
if (out == "stdout" || out == "cout")
stdout_fd = STDOUT_FILENO;
else if (out == "stderr" || out == "cerr")
stdout_fd = STDERR_FILENO;
else
stdout_fd = Process::openOutputFile(out);
stderr_fd = (stdout_fd != STDOUT_FILENO) ? stdout_fd : STDERR_FILENO;
return LiveProcess::create(getInstanceName(),
stdin_fd, stdout_fd, stderr_fd,
cmd, env);
}
REGISTER_SIM_OBJECT("LiveProcess", LiveProcess)