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/*
* 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/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"
extern SymbolTable *debugSymbolTable;
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");
#ifdef DEBUG
kernelPanicEvent = new BreakPCEvent(&pcEventQueue, "kernel panic");
if (kernelSymtab->findAddress("panic", addr))
kernelPanicEvent->schedule(addr);
else
panic("could not find kernel symbol \'panic\'");
#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 (kernelSymtab->findAddress("do_entInt", addr))
intStartEvent->schedule(addr + sizeof(MachInst) * 2);
intEndEvent = new InterruptEndEvent(&pcEventQueue, "intStartEvent");
if (palSymtab->findAddress("Call_Pal_Rti", addr))
intEndEvent->schedule(addr + sizeof(MachInst));
else
panic("could not find symbol\n");
}
LinuxSystem::~LinuxSystem()
{
#ifdef DEBUG
delete kernelPanicEvent;
#endif
delete skipIdeDelay50msEvent;
delete skipDelayLoopEvent;
delete skipCacheProbeEvent;
delete debugPrintkEvent;
delete idleStartEvent;
delete printThreadEvent;
delete intStartEvent;
}
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 *> mem_ctl;
SimObjectParam<PhysicalMemory *> physmem;
Param<string> kernel_code;
Param<string> console_code;
Param<string> pal_code;
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(mem_ctl, "memory controller"),
INIT_PARAM(physmem, "phsyical memory"),
INIT_PARAM(kernel_code, "file that contains the kernel code"),
INIT_PARAM(console_code, "file that contains the console code"),
INIT_PARAM(pal_code, "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?", false)
END_INIT_SIM_OBJECT_PARAMS(LinuxSystem)
CREATE_SIM_OBJECT(LinuxSystem)
{
System::Params *p = new System::Params;
p->name = getInstanceName();
p->memctrl = mem_ctl;
p->physmem = physmem;
p->kernel_path = kernel_code;
p->console_path = console_code;
p->palcode = pal_code;
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)
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