08d9e0ea7a
Set locked flag if required
make SC always return success -- this needs to be fixed at some point
fix a couple of things
FS executes a bit of console code before dying a horrible death
arch/alpha/linux/system.cc:
only need to copy the length of the os flags param, not 256 bytes
cpu/simple/cpu.cc:
Set the physical flag if required
Make LL/SC always return success
mem/bus.cc:
add some dprintfs and change a assert to a panic
mem/port.cc:
delete the buffer with the [] operator
mem/request.hh:
add a function to reset a request
--HG--
extra : convert_revision : f2b78ddad33c7f6ffe1c48791d86609ff1d10d46
265 lines
9 KiB
C++
265 lines
9 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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/**
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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/arguments.hh"
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#include "arch/vtophys.hh"
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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/system.hh"
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#include "base/loader/symtab.hh"
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#include "cpu/exec_context.hh"
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#include "cpu/base.hh"
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#include "dev/platform.hh"
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#include "kern/linux/printk.hh"
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#include "kern/linux/events.hh"
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#include "mem/physical.hh"
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#include "mem/port.hh"
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#include "sim/builder.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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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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virtPort.writeBlob(CommandLine(), (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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virtPort.write(addr, (uint64_t)(Clock::Frequency /
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p->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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virtPort.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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#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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if (kernelSymtab->findAddress("alpha_switch_to", addr) && DTRACE(Thread)) {
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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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if (params()->bin_int) {
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intStartEvent = addPalFuncEvent<InterruptStartEvent>("sys_int_21");
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if (!intStartEvent)
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panic("could not find symbol: sys_int_21\n");
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intEndEvent = addPalFuncEvent<InterruptEndEvent>("rti_to_kern");
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if (!intEndEvent)
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panic("could not find symbol: rti_to_kern\n");
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intEndEvent2 = addPalFuncEvent<InterruptEndEvent>("rti_to_user");
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if (!intEndEvent2)
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panic("could not find symbol: rti_to_user\n");
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intEndEvent3 = addKernelFuncEvent<InterruptEndEvent>("do_softirq");
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if (!intEndEvent3)
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panic("could not find symbol: do_softirq\n");
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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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delete intStartEvent;
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delete intEndEvent;
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delete intEndEvent2;
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}
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void
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LinuxAlphaSystem::setDelayLoop(ExecContext *xc)
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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 = xc->getCpuPtr()->frequency();
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Tick intrFreq = platform->intrFrequency();
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xc->getVirtPort(xc)->write(addr,
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(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(ExecContext *xc)
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{
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SkipFuncEvent::process(xc);
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// calculate and set loops_per_jiffy
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((LinuxAlphaSystem *)xc->getSystemPtr())->setDelayLoop(xc);
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}
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void
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LinuxAlphaSystem::PrintThreadInfo::process(ExecContext *xc)
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{
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Linux::ThreadInfo ti(xc);
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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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BEGIN_DECLARE_SIM_OBJECT_PARAMS(LinuxAlphaSystem)
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Param<Tick> boot_cpu_frequency;
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SimObjectParam<PhysicalMemory *> physmem;
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Param<string> kernel;
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Param<string> console;
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Param<string> pal;
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Param<string> boot_osflags;
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Param<string> readfile;
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Param<unsigned int> init_param;
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Param<uint64_t> system_type;
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Param<uint64_t> system_rev;
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Param<bool> bin;
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VectorParam<string> binned_fns;
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Param<bool> bin_int;
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END_DECLARE_SIM_OBJECT_PARAMS(LinuxAlphaSystem)
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BEGIN_INIT_SIM_OBJECT_PARAMS(LinuxAlphaSystem)
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INIT_PARAM(boot_cpu_frequency, "Frequency of the boot CPU"),
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INIT_PARAM(physmem, "phsyical memory"),
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INIT_PARAM(kernel, "file that contains the kernel code"),
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INIT_PARAM(console, "file that contains the console code"),
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INIT_PARAM(pal, "file that contains palcode"),
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INIT_PARAM_DFLT(boot_osflags, "flags to pass to the kernel during boot",
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"a"),
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INIT_PARAM_DFLT(readfile, "file to read startup script from", ""),
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INIT_PARAM_DFLT(init_param, "numerical value to pass into simulator", 0),
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INIT_PARAM_DFLT(system_type, "Type of system we are emulating", 34),
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INIT_PARAM_DFLT(system_rev, "Revision of system we are emulating", 1<<10),
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INIT_PARAM_DFLT(bin, "is this system to be binned", false),
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INIT_PARAM(binned_fns, "functions to be broken down and binned"),
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INIT_PARAM_DFLT(bin_int, "is interrupt code binned seperately?", true)
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END_INIT_SIM_OBJECT_PARAMS(LinuxAlphaSystem)
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CREATE_SIM_OBJECT(LinuxAlphaSystem)
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{
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AlphaSystem::Params *p = new AlphaSystem::Params;
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p->name = getInstanceName();
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p->boot_cpu_frequency = boot_cpu_frequency;
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p->physmem = physmem;
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p->kernel_path = kernel;
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p->console_path = console;
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p->palcode = pal;
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p->boot_osflags = boot_osflags;
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p->init_param = init_param;
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p->readfile = readfile;
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p->system_type = system_type;
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p->system_rev = system_rev;
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p->bin = bin;
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p->binned_fns = binned_fns;
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p->bin_int = bin_int;
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return new LinuxAlphaSystem(p);
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}
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REGISTER_SIM_OBJECT("LinuxAlphaSystem", LinuxAlphaSystem)
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