gem5/kern/linux/linux_system.cc
Ron Dreslinski d9317dd348 Some more useful debugging info for kernel panic and die events
Increase the default number of CSHR's, we should really fix this or make it a parameter

Use a setBlocked call to tell the bus it should block

New technique for sampling and switchover:
1) Sampler switchover event happens
2) All cpus in the current phase of sampling associated with this sampler are signaled to switchover
3) Each cpu drains it's pipe of things being executed (stops fetching and waits for empty pipe)
4) Once the pipe is empty the cpu calls back to the sampler to signal it has finished, and moves into the switchedout state (continues not to fetch)
5) The sampler collects all the signals, once all cpus are drained it calls the new cpu's in the next phase to takeover from the correct cpu
6) The statistics are reset and the next switchover time is calculated from this point

cpu/base_cpu.cc:
cpu/base_cpu.hh:
cpu/simple_cpu/simple_cpu.cc:
cpu/simple_cpu/simple_cpu.hh:
    Reconfigure the way the sampling switchover works
cpu/pc_event.cc:
    More debugging information on kernel panic's
kern/linux/linux_system.cc:
    More debug info for Kernel Die events
kern/linux/linux_system.hh:
    More debug info for kernel die events

--HG--
extra : convert_revision : 61cc42e43ba738705aa1f1d167b65d4d6dee51ae
2005-02-09 10:27:00 -05:00

278 lines
9.8 KiB
C++

/*
* Copyright (c) 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.
*/
/**
* @file
* This code loads the linux kernel, console, pal and patches certain
* functions. The symbol tables are loaded so that traces can show
* the executing function and we can skip functions. Various delay
* loops are skipped and their final values manually computed to speed
* up boot time.
*/
#include "base/loader/symtab.hh"
#include "base/trace.hh"
#include "cpu/exec_context.hh"
#include "cpu/base_cpu.hh"
#include "kern/linux/linux_events.hh"
#include "kern/linux/linux_system.hh"
#include "kern/system_events.hh"
#include "mem/functional_mem/memory_control.hh"
#include "mem/functional_mem/physical_memory.hh"
#include "sim/builder.hh"
#include "dev/platform.hh"
#include "targetarch/isa_traits.hh"
#include "targetarch/vtophys.hh"
#include "sim/debug.hh"
using namespace std;
LinuxSystem::LinuxSystem(Params *p)
: System(p)
{
Addr addr = 0;
/**
* find the address of the est_cycle_freq variable and insert it
* so we don't through the lengthly process of trying to
* calculated it by using the PIT, RTC, etc.
*/
if (kernelSymtab->findAddress("est_cycle_freq", addr)) {
Addr paddr = vtophys(physmem, addr);
uint8_t *est_cycle_frequency =
physmem->dma_addr(paddr, sizeof(uint64_t));
if (est_cycle_frequency)
*(uint64_t *)est_cycle_frequency = htoa(ticksPerSecond);
}
/**
* Since we aren't using a bootloader, we have to copy the kernel arguments
* directly into the kernels memory.
*/
{
Addr paddr = vtophys(physmem, PARAM_ADDR);
char *commandline = (char*)physmem->dma_addr(paddr, sizeof(uint64_t));
if (commandline)
strcpy(commandline, params->boot_osflags.c_str());
}
/**
* EV5 only supports 127 ASNs so we are going to tell the kernel that the
* paritiuclar EV6 we have only supports 127 asns.
* @todo At some point we should change ev5.hh and the palcode to support
* 255 ASNs.
*/
if (kernelSymtab->findAddress("dp264_mv", addr)) {
Addr paddr = vtophys(physmem, addr);
char *dp264_mv = (char *)physmem->dma_addr(paddr, sizeof(uint64_t));
if (dp264_mv) {
*(uint32_t*)(dp264_mv+0x18) = htoa((uint32_t)127);
} else
panic("could not translate dp264_mv addr\n");
} else
panic("could not find dp264_mv\n");
#ifndef NDEBUG
kernelPanicEvent = new BreakPCEvent(&pcEventQueue, "kernel panic");
if (kernelSymtab->findAddress("panic", addr))
kernelPanicEvent->schedule(addr);
else
panic("could not find kernel symbol \'panic\'");
kernelDieEvent = new BreakPCEvent(&pcEventQueue, "die if kernel");
if (kernelSymtab->findAddress("die_if_kernel", addr))
kernelDieEvent->schedule(addr);
else
panic("could not find kernel symbol \'die_if_kernel\'");
#endif
/**
* Any time ide_delay_50ms, calibarte_delay or
* determine_cpu_caches is called just skip the
* function. Currently determine_cpu_caches only is used put
* information in proc, however if that changes in the future we
* will have to fill in the cache size variables appropriately.
*/
skipIdeDelay50msEvent = new SkipFuncEvent(&pcEventQueue, "ide_delay_50ms");
if (kernelSymtab->findAddress("ide_delay_50ms", addr))
skipIdeDelay50msEvent->schedule(addr+sizeof(MachInst));
skipDelayLoopEvent = new LinuxSkipDelayLoopEvent(&pcEventQueue,
"calibrate_delay");
if (kernelSymtab->findAddress("calibrate_delay", addr))
skipDelayLoopEvent->schedule(addr+sizeof(MachInst));
skipCacheProbeEvent = new SkipFuncEvent(&pcEventQueue,
"determine_cpu_caches");
if (kernelSymtab->findAddress("determine_cpu_caches", addr))
skipCacheProbeEvent->schedule(addr+sizeof(MachInst));
debugPrintkEvent = new DebugPrintkEvent(&pcEventQueue, "dprintk");
if (kernelSymtab->findAddress("dprintk", addr))
debugPrintkEvent->schedule(addr+8);
idleStartEvent = new IdleStartEvent(&pcEventQueue, "cpu_idle", this);
if (kernelSymtab->findAddress("cpu_idle", addr))
idleStartEvent->schedule(addr);
printThreadEvent = new PrintThreadInfo(&pcEventQueue, "threadinfo");
if (kernelSymtab->findAddress("alpha_switch_to", addr) && DTRACE(Thread))
printThreadEvent->schedule(addr + sizeof(MachInst) * 6);
intStartEvent = new InterruptStartEvent(&pcEventQueue, "intStartEvent");
if (params->bin_int) {
if (palSymtab->findAddress("sys_int_21", addr))
intStartEvent->schedule(addr + sizeof(MachInst) * 2);
else
panic("could not find symbol: sys_int_21\n");
intEndEvent = new InterruptEndEvent(&pcEventQueue, "intEndEvent");
if (palSymtab->findAddress("rti_to_kern", addr))
intEndEvent->schedule(addr) ;
else
panic("could not find symbol: rti_to_kern\n");
intEndEvent2 = new InterruptEndEvent(&pcEventQueue, "intEndEvent2");
if (palSymtab->findAddress("rti_to_user", addr))
intEndEvent2->schedule(addr);
else
panic("could not find symbol: rti_to_user\n");
intEndEvent3 = new InterruptEndEvent(&pcEventQueue, "intEndEvent3");
if (kernelSymtab->findAddress("do_softirq", addr))
intEndEvent3->schedule(addr + sizeof(MachInst) * 2);
else
panic("could not find symbol: do_softirq\n");
}
}
LinuxSystem::~LinuxSystem()
{
#ifndef NDEBUG
delete kernelPanicEvent;
#endif
delete skipIdeDelay50msEvent;
delete skipDelayLoopEvent;
delete skipCacheProbeEvent;
delete debugPrintkEvent;
delete idleStartEvent;
delete printThreadEvent;
delete intStartEvent;
delete intEndEvent;
delete intEndEvent2;
}
void
LinuxSystem::setDelayLoop(ExecContext *xc)
{
Addr addr = 0;
if (kernelSymtab->findAddress("loops_per_jiffy", addr)) {
Addr paddr = vtophys(physmem, addr);
uint8_t *loops_per_jiffy =
physmem->dma_addr(paddr, sizeof(uint32_t));
Tick cpuFreq = xc->cpu->getFreq();
Tick intrFreq = platform->interrupt_frequency;
*(uint32_t *)loops_per_jiffy =
(uint32_t)((cpuFreq / intrFreq) * 0.9988);
}
}
BEGIN_DECLARE_SIM_OBJECT_PARAMS(LinuxSystem)
SimObjectParam<MemoryController *> memctrl;
SimObjectParam<PhysicalMemory *> physmem;
Param<string> kernel;
Param<string> console;
Param<string> pal;
Param<string> boot_osflags;
Param<string> readfile;
Param<unsigned int> init_param;
Param<uint64_t> system_type;
Param<uint64_t> system_rev;
Param<bool> bin;
VectorParam<string> binned_fns;
Param<bool> bin_int;
END_DECLARE_SIM_OBJECT_PARAMS(LinuxSystem)
BEGIN_INIT_SIM_OBJECT_PARAMS(LinuxSystem)
INIT_PARAM(memctrl, "memory controller"),
INIT_PARAM(physmem, "phsyical memory"),
INIT_PARAM(kernel, "file that contains the kernel code"),
INIT_PARAM(console, "file that contains the console code"),
INIT_PARAM(pal, "file that contains palcode"),
INIT_PARAM_DFLT(boot_osflags, "flags to pass to the kernel during boot",
"a"),
INIT_PARAM_DFLT(readfile, "file to read startup script from", ""),
INIT_PARAM_DFLT(init_param, "numerical value to pass into simulator", 0),
INIT_PARAM_DFLT(system_type, "Type of system we are emulating", 34),
INIT_PARAM_DFLT(system_rev, "Revision of system we are emulating", 1<<10),
INIT_PARAM_DFLT(bin, "is this system to be binned", false),
INIT_PARAM(binned_fns, "functions to be broken down and binned"),
INIT_PARAM_DFLT(bin_int, "is interrupt code binned seperately?", true)
END_INIT_SIM_OBJECT_PARAMS(LinuxSystem)
CREATE_SIM_OBJECT(LinuxSystem)
{
System::Params *p = new System::Params;
p->name = getInstanceName();
p->memctrl = memctrl;
p->physmem = physmem;
p->kernel_path = kernel;
p->console_path = console;
p->palcode = pal;
p->boot_osflags = boot_osflags;
p->init_param = init_param;
p->readfile = readfile;
p->system_type = system_type;
p->system_rev = system_rev;
p->bin = bin;
p->binned_fns = binned_fns;
p->bin_int = bin_int;
return new LinuxSystem(p);
}
REGISTER_SIM_OBJECT("LinuxSystem", LinuxSystem)