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/*
* Copyright (c) 2004-2005 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.
*
* Authors: Ben Nash
*/
/**
* @file
* Modifications for the FreeBSD kernel.
* Based on kern/linux/linux_system.cc.
*
*/
#include "arch/alpha/freebsd/system.hh"
#include "arch/alpha/system.hh"
#include "arch/isa_traits.hh"
#include "arch/vtophys.hh"
#include "base/loader/symtab.hh"
#include "cpu/thread_context.hh"
#include "mem/physical.hh"
#include "mem/port.hh"
#include "sim/byteswap.hh"
#define TIMER_FREQUENCY 1193180
using namespace std;
using namespace AlphaISA;
FreebsdAlphaSystem::FreebsdAlphaSystem(Params *p)
: AlphaSystem(p)
{
/**
* Any time DELAY is called just skip the function.
* Shouldn't we actually emulate the delay?
*/
skipDelayEvent = addKernelFuncEvent<SkipFuncEvent>("DELAY");
skipCalibrateClocks =
addKernelFuncEvent<SkipCalibrateClocksEvent>("calibrate_clocks");
}
FreebsdAlphaSystem::~FreebsdAlphaSystem()
{
delete skipDelayEvent;
delete skipCalibrateClocks;
}
void
FreebsdAlphaSystem::doCalibrateClocks(ThreadContext *tc)
{
Addr ppc_vaddr = 0;
Addr timer_vaddr = 0;
assert(NumArgumentRegs >= 3);
ppc_vaddr = (Addr)tc->readIntReg(ArgumentReg[1]);
timer_vaddr = (Addr)tc->readIntReg(ArgumentReg[2]);
virtPort.write(ppc_vaddr, (uint32_t)Clock::Frequency);
virtPort.write(timer_vaddr, (uint32_t)TIMER_FREQUENCY);
}
void
FreebsdAlphaSystem::SkipCalibrateClocksEvent::process(ThreadContext *tc)
{
SkipFuncEvent::process(tc);
((FreebsdAlphaSystem *)tc->getSystemPtr())->doCalibrateClocks(tc);
}
FreebsdAlphaSystem *
FreebsdAlphaSystemParams::create()
{
return new FreebsdAlphaSystem(this);
}
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