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/*
* Copyright (c) 2015 Ruslan Bukin <br@bsdpad.com>
* All rights reserved.
*
* This software was developed by the University of Cambridge Computer
* Laboratory as part of the CTSRD Project, with support from the UK Higher
* Education Innovation Fund (HEIF).
*
* 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.
*/
#include "arch/arm/freebsd/system.hh"
#include "arch/arm/isa_traits.hh"
#include "arch/arm/utility.hh"
#include "arch/generic/freebsd/threadinfo.hh"
#include "base/loader/dtb_object.hh"
#include "base/loader/object_file.hh"
#include "base/loader/symtab.hh"
#include "cpu/base.hh"
#include "cpu/pc_event.hh"
#include "cpu/thread_context.hh"
#include "debug/Loader.hh"
#include "kern/freebsd/events.hh"
#include "mem/fs_translating_port_proxy.hh"
#include "mem/physical.hh"
#include "sim/stat_control.hh"
using namespace ArmISA;
using namespace FreeBSD;
FreebsdArmSystem::FreebsdArmSystem(Params *p)
: GenericArmSystem(p),
enableContextSwitchStatsDump(p->enable_context_switch_stats_dump),
taskFile(nullptr), kernelPanicEvent(nullptr), kernelOopsEvent(nullptr)
{
if (p->panic_on_panic) {
kernelPanicEvent = addKernelFuncEventOrPanic<PanicPCEvent>(
"panic", "Kernel panic in simulated kernel");
} else {
#ifndef NDEBUG
kernelPanicEvent = addKernelFuncEventOrPanic<BreakPCEvent>("panic");
#endif
}
if (p->panic_on_oops) {
kernelOopsEvent = addKernelFuncEventOrPanic<PanicPCEvent>(
"oops_exit", "Kernel oops in guest");
}
uDelaySkipEvent = addKernelFuncEvent<UDelayEvent>(
"DELAY", "DELAY", 1000, 0);
}
void
FreebsdArmSystem::initState()
{
// Moved from the constructor to here since it relies on the
// address map being resolved in the interconnect
// Call the initialisation of the super class
GenericArmSystem::initState();
// Load symbols at physical address, we might not want
// to do this permanently, for but early bootup work
// it is helpful.
if (params()->early_kernel_symbols) {
kernel->loadGlobalSymbols(kernelSymtab, 0, 0, loadAddrMask);
kernel->loadGlobalSymbols(debugSymbolTable, 0, 0, loadAddrMask);
}
// Setup boot data structure
Addr addr = 0;
// Check if the kernel image has a symbol that tells us it supports
// device trees.
bool kernel_has_fdt_support =
kernelSymtab->findAddress("fdt_get_range", addr);
bool dtb_file_specified = params()->dtb_filename != "";
if (!dtb_file_specified)
fatal("dtb file is not specified\n");
if (!kernel_has_fdt_support)
fatal("kernel must have fdt support\n");
// Kernel supports flattened device tree and dtb file specified.
// Using Device Tree Blob to describe system configuration.
inform("Loading DTB file: %s at address %#x\n", params()->dtb_filename,
params()->atags_addr + loadAddrOffset);
ObjectFile *dtb_file = createObjectFile(params()->dtb_filename, true);
if (!dtb_file) {
fatal("couldn't load DTB file: %s\n", params()->dtb_filename);
}
DtbObject *_dtb_file = dynamic_cast<DtbObject*>(dtb_file);
if (_dtb_file) {
if (!_dtb_file->addBootCmdLine(params()->boot_osflags.c_str(),
params()->boot_osflags.size())) {
warn("couldn't append bootargs to DTB file: %s\n",
params()->dtb_filename);
}
} else {
warn("dtb_file cast failed; couldn't append bootargs "
"to DTB file: %s\n", params()->dtb_filename);
}
Addr ra = _dtb_file->findReleaseAddr();
if (ra)
bootReleaseAddr = ra & ~ULL(0x7F);
dtb_file->setTextBase(params()->atags_addr + loadAddrOffset);
dtb_file->loadSections(physProxy);
delete dtb_file;
// Kernel boot requirements to set up r0, r1 and r2 in ARMv7
for (int i = 0; i < threadContexts.size(); i++) {
threadContexts[i]->setIntReg(0, 0);
threadContexts[i]->setIntReg(1, params()->machine_type);
threadContexts[i]->setIntReg(2, params()->atags_addr + loadAddrOffset);
}
}
FreebsdArmSystem::~FreebsdArmSystem()
{
if (uDelaySkipEvent)
delete uDelaySkipEvent;
if (constUDelaySkipEvent)
delete constUDelaySkipEvent;
}
FreebsdArmSystem *
FreebsdArmSystemParams::create()
{
return new FreebsdArmSystem(this);
}
void
FreebsdArmSystem::startup()
{
}
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