149 lines
5.3 KiB
C++
149 lines
5.3 KiB
C++
/*
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* Copyright (c) 2010 ARM Limited
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* All rights reserved
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*
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* The license below extends only to copyright in the software and shall
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* not be construed as granting a license to any other intellectual
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* property including but not limited to intellectual property relating
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* to a hardware implementation of the functionality of the software
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* licensed hereunder. You may use the software subject to the license
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* terms below provided that you ensure that this notice is replicated
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* unmodified and in its entirety in all distributions of the software,
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* modified or unmodified, in source code or in binary form.
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*
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* Copyright (c) 2002-2006 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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*/
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#include "arch/arm/linux/atag.hh"
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#include "arch/arm/linux/system.hh"
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#include "arch/arm/isa_traits.hh"
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#include "arch/arm/utility.hh"
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#include "base/loader/object_file.hh"
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#include "base/loader/symtab.hh"
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#include "cpu/thread_context.hh"
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#include "kern/linux/events.hh"
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#include "mem/physical.hh"
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using namespace ArmISA;
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using namespace Linux;
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LinuxArmSystem::LinuxArmSystem(Params *p)
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: ArmSystem(p)
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{
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// Load symbols at physical address, we might not want
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// to do this perminately, for but early bootup work
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// it is helpfulp.
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kernel->loadGlobalSymbols(kernelSymtab, loadAddrMask);
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kernel->loadGlobalSymbols(debugSymbolTable, loadAddrMask);
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// Setup boot data structure
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AtagCore *ac = new AtagCore;
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ac->flags(1); // read-only
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ac->pagesize(8192);
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ac->rootdev(0);
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AtagMem *am = new AtagMem;
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am->memSize(params()->physmem->size());
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am->memStart(params()->physmem->start());
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AtagCmdline *ad = new AtagCmdline;
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ad->cmdline(params()->boot_osflags);
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DPRINTF(Loader, "boot command line %d bytes: %s\n", ad->size() <<2, params()->boot_osflags.c_str());
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AtagNone *an = new AtagNone;
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uint32_t size = ac->size() + am->size() + ad->size() + an->size();
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uint32_t offset = 0;
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uint8_t *boot_data = new uint8_t[size << 2];
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offset += ac->copyOut(boot_data + offset);
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offset += am->copyOut(boot_data + offset);
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offset += ad->copyOut(boot_data + offset);
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offset += an->copyOut(boot_data + offset);
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DPRINTF(Loader, "Boot atags was %d bytes in total\n", size << 2);
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DDUMP(Loader, boot_data, size << 2);
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functionalPort->writeBlob(ParamsList, boot_data, size << 2);
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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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#endif
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// With ARM udelay() is #defined to __udelay
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Addr addr = 0;
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if (kernelSymtab->findAddress("__udelay", addr)) {
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uDelaySkipEvent = new UDelayEvent(&pcEventQueue, "__udelay",
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fixFuncEventAddr(addr), 1000, 0);
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} else {
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panic("couldn't find kernel symbol \'udelay\'");
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}
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// constant arguments to udelay() have some precomputation done ahead of
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// time. Constant comes from code.
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if (kernelSymtab->findAddress("__const_udelay", addr)) {
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constUDelaySkipEvent = new UDelayEvent(&pcEventQueue, "__const_udelay",
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fixFuncEventAddr(addr), 1000, 107374);
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} else {
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panic("couldn't find kernel symbol \'udelay\'");
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}
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}
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void
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LinuxArmSystem::initState()
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{
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ArmSystem::initState();
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ThreadContext *tc = threadContexts[0];
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// Set the initial PC to be at start of the kernel code
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tc->pcState(tc->getSystemPtr()->kernelEntry & loadAddrMask);
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// Setup the machine type
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tc->setIntReg(0, 0);
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tc->setIntReg(1, params()->machine_type);
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tc->setIntReg(2, ParamsList);
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}
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LinuxArmSystem::~LinuxArmSystem()
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{
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if (uDelaySkipEvent)
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delete uDelaySkipEvent;
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if (constUDelaySkipEvent)
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delete constUDelaySkipEvent;
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}
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LinuxArmSystem *
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LinuxArmSystemParams::create()
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{
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return new LinuxArmSystem(this);
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}
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