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