3ce2d0fad0
The change to port proxies recently moved code out of the constructor into initState(). This is needed for code that loads data into memory, however for code that setups symbol tables, kernel based events, etc this is the wrong thing to do as that code is only called when a checkpoint isn't being restored from.
212 lines
7.1 KiB
C++
212 lines
7.1 KiB
C++
/*
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* Copyright (c) 2004-2005 The Regents of The University of Michigan
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met: redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer;
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* redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution;
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* neither the name of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* Authors: Ali Saidi
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* Lisa Hsu
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* Nathan Binkert
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* Steve Reinhardt
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*/
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/**
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* @file
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* This code loads the linux kernel, console, pal and patches certain
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* functions. The symbol tables are loaded so that traces can show
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* the executing function and we can skip functions. Various delay
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* loops are skipped and their final values manually computed to speed
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* up boot time.
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*/
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#include "arch/alpha/linux/system.hh"
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#include "arch/alpha/linux/threadinfo.hh"
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#include "arch/alpha/idle_event.hh"
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#include "arch/alpha/system.hh"
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#include "arch/vtophys.hh"
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#include "base/loader/symtab.hh"
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#include "cpu/base.hh"
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#include "cpu/thread_context.hh"
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#include "debug/Thread.hh"
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#include "kern/linux/events.hh"
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#include "kern/linux/printk.hh"
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#include "mem/physical.hh"
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#include "mem/port.hh"
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#include "sim/arguments.hh"
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#include "sim/byteswap.hh"
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using namespace std;
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using namespace AlphaISA;
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using namespace Linux;
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LinuxAlphaSystem::LinuxAlphaSystem(Params *p)
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: AlphaSystem(p)
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{
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}
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void
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LinuxAlphaSystem::initState()
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{
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// Moved from the constructor to here since it relies on the
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// address map being resolved in the interconnect
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// Call the initialisation of the super class
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AlphaSystem::initState();
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Addr addr = 0;
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/**
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* The symbol swapper_pg_dir marks the beginning of the kernel and
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* the location of bootloader passed arguments
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*/
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if (!kernelSymtab->findAddress("swapper_pg_dir", KernelStart)) {
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panic("Could not determine start location of kernel");
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}
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/**
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* Since we aren't using a bootloader, we have to copy the
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* kernel arguments directly into the kernel's memory.
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*/
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virtProxy.writeBlob(CommandLine(),
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(uint8_t*)params()->boot_osflags.c_str(),
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params()->boot_osflags.length()+1);
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/**
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* find the address of the est_cycle_freq variable and insert it
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* so we don't through the lengthly process of trying to
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* calculated it by using the PIT, RTC, etc.
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*/
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if (kernelSymtab->findAddress("est_cycle_freq", addr))
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virtProxy.write(addr, (uint64_t)(SimClock::Frequency /
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params()->boot_cpu_frequency));
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/**
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* EV5 only supports 127 ASNs so we are going to tell the kernel that the
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* paritiuclar EV6 we have only supports 127 asns.
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* @todo At some point we should change ev5.hh and the palcode to support
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* 255 ASNs.
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*/
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if (kernelSymtab->findAddress("dp264_mv", addr))
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virtProxy.write(addr + 0x18, LittleEndianGuest::htog((uint32_t)127));
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else
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panic("could not find dp264_mv\n");
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}
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void
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LinuxAlphaSystem::setupFuncEvents()
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{
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AlphaSystem::setupFuncEvents();
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#ifndef NDEBUG
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kernelPanicEvent = addKernelFuncEvent<BreakPCEvent>("panic");
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if (!kernelPanicEvent)
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panic("could not find kernel symbol \'panic\'");
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#if 0
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kernelDieEvent = addKernelFuncEvent<BreakPCEvent>("die_if_kernel");
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if (!kernelDieEvent)
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panic("could not find kernel symbol \'die_if_kernel\'");
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#endif
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#endif
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/**
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* Any time ide_delay_50ms, calibarte_delay or
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* determine_cpu_caches is called just skip the
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* function. Currently determine_cpu_caches only is used put
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* information in proc, however if that changes in the future we
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* will have to fill in the cache size variables appropriately.
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*/
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skipIdeDelay50msEvent =
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addKernelFuncEvent<SkipFuncEvent>("ide_delay_50ms");
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skipDelayLoopEvent =
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addKernelFuncEvent<SkipDelayLoopEvent>("calibrate_delay");
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skipCacheProbeEvent =
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addKernelFuncEvent<SkipFuncEvent>("determine_cpu_caches");
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debugPrintkEvent = addKernelFuncEvent<DebugPrintkEvent>("dprintk");
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idleStartEvent = addKernelFuncEvent<IdleStartEvent>("cpu_idle");
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// Disable for now as it runs into panic() calls in VPTr methods
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// (see sim/vptr.hh). Once those bugs are fixed, we can
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// re-enable, but we should find a better way to turn it on than
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// using DTRACE(Thread), since looking at a trace flag at tick 0
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// leads to non-intuitive behavior with --trace-start.
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Addr addr = 0;
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if (false && kernelSymtab->findAddress("alpha_switch_to", addr)) {
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printThreadEvent = new PrintThreadInfo(&pcEventQueue, "threadinfo",
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addr + sizeof(MachInst) * 6);
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} else {
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printThreadEvent = NULL;
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}
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}
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LinuxAlphaSystem::~LinuxAlphaSystem()
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{
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#ifndef NDEBUG
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delete kernelPanicEvent;
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#endif
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delete skipIdeDelay50msEvent;
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delete skipDelayLoopEvent;
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delete skipCacheProbeEvent;
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delete debugPrintkEvent;
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delete idleStartEvent;
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delete printThreadEvent;
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}
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void
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LinuxAlphaSystem::setDelayLoop(ThreadContext *tc)
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{
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Addr addr = 0;
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if (kernelSymtab->findAddress("loops_per_jiffy", addr)) {
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Tick cpuFreq = tc->getCpuPtr()->frequency();
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assert(intrFreq);
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FSTranslatingPortProxy &vp = tc->getVirtProxy();
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vp.writeHtoG(addr, (uint32_t)((cpuFreq / intrFreq) * 0.9988));
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}
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}
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void
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LinuxAlphaSystem::SkipDelayLoopEvent::process(ThreadContext *tc)
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{
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SkipFuncEvent::process(tc);
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// calculate and set loops_per_jiffy
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((LinuxAlphaSystem *)tc->getSystemPtr())->setDelayLoop(tc);
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}
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void
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LinuxAlphaSystem::PrintThreadInfo::process(ThreadContext *tc)
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{
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Linux::ThreadInfo ti(tc);
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DPRINTF(Thread, "Currently Executing Thread %s, pid %d, started at: %d\n",
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ti.curTaskName(), ti.curTaskPID(), ti.curTaskStart());
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}
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LinuxAlphaSystem *
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LinuxAlphaSystemParams::create()
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{
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return new LinuxAlphaSystem(this);
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}
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