158 lines
5.1 KiB
C++
158 lines
5.1 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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/**
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* @file
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* Modifications for the FreeBSD kernel.
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* Based on kern/linux/linux_system.cc.
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*
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*/
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#include "arch/alpha/system.hh"
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#include "arch/alpha/freebsd/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 "mem/functional/memory_control.hh"
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#include "mem/functional/physical.hh"
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#include "arch/isa_traits.hh"
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#include "sim/builder.hh"
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#include "sim/byteswap.hh"
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#include "arch/vtophys.hh"
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#define TIMER_FREQUENCY 1193180
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using namespace std;
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using namespace AlphaISA;
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FreebsdAlphaSystem::FreebsdAlphaSystem(Params *p)
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: AlphaSystem(p)
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{
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/**
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* Any time DELAY is called just skip the function.
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* Shouldn't we actually emulate the delay?
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*/
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skipDelayEvent = addKernelFuncEvent<SkipFuncEvent>("DELAY");
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skipCalibrateClocks =
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addKernelFuncEvent<SkipCalibrateClocksEvent>("calibrate_clocks");
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}
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FreebsdAlphaSystem::~FreebsdAlphaSystem()
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{
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delete skipDelayEvent;
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delete skipCalibrateClocks;
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}
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void
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FreebsdAlphaSystem::doCalibrateClocks(ExecContext *xc)
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{
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Addr ppc_vaddr = 0;
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Addr timer_vaddr = 0;
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Addr ppc_paddr = 0;
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Addr timer_paddr = 0;
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ppc_vaddr = (Addr)xc->readIntReg(ArgumentReg1);
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timer_vaddr = (Addr)xc->readIntReg(ArgumentReg2);
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ppc_paddr = vtophys(physmem, ppc_vaddr);
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timer_paddr = vtophys(physmem, timer_vaddr);
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uint8_t *ppc = physmem->dma_addr(ppc_paddr, sizeof(uint32_t));
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uint8_t *timer = physmem->dma_addr(timer_paddr, sizeof(uint32_t));
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*(uint32_t *)ppc = htog((uint32_t)Clock::Frequency);
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*(uint32_t *)timer = htog((uint32_t)TIMER_FREQUENCY);
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}
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void
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FreebsdAlphaSystem::SkipCalibrateClocksEvent::process(ExecContext *xc)
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{
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SkipFuncEvent::process(xc);
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((FreebsdAlphaSystem *)xc->getSystemPtr())->doCalibrateClocks(xc);
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}
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BEGIN_DECLARE_SIM_OBJECT_PARAMS(FreebsdAlphaSystem)
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Param<Tick> boot_cpu_frequency;
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SimObjectParam<MemoryController *> memctrl;
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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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END_DECLARE_SIM_OBJECT_PARAMS(FreebsdAlphaSystem)
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BEGIN_INIT_SIM_OBJECT_PARAMS(FreebsdAlphaSystem)
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INIT_PARAM(boot_cpu_frequency, "Frequency of the boot CPU"),
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INIT_PARAM(memctrl, "memory controller"),
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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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END_INIT_SIM_OBJECT_PARAMS(FreebsdAlphaSystem)
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CREATE_SIM_OBJECT(FreebsdAlphaSystem)
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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->memctrl = memctrl;
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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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return new FreebsdAlphaSystem(p);
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}
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REGISTER_SIM_OBJECT("FreebsdAlphaSystem", FreebsdAlphaSystem)
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