5299c75e62
Add registers and components to better support the VersatileEB board. Made the MIDR and SYS_ID register parameters to ArmSystem and RealviewCtrl respectively.
127 lines
4.6 KiB
C++
127 lines
4.6 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 <iostream>
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#include "arch/arm/system.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 "mem/physical.hh"
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using namespace std;
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using namespace Linux;
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ArmSystem::ArmSystem(Params *p)
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: System(p), bootldr(NULL)
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{
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debugPrintkEvent = addKernelFuncEvent<DebugPrintkEvent>("dprintk");
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if ((p->boot_loader == "") != (p->boot_loader_mem == NULL))
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fatal("If boot_loader is specifed, memory to load it must be also.\n");
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if (p->boot_loader != "") {
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bootldr = createObjectFile(p->boot_loader);
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if (!bootldr)
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fatal("Could not read bootloader: %s\n", p->boot_loader);
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Port *mem_port;
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FunctionalPort fp(name() + "-fport");
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mem_port = p->boot_loader_mem->getPort("functional");
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fp.setPeer(mem_port);
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mem_port->setPeer(&fp);
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bootldr->loadSections(&fp);
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bootldr->loadGlobalSymbols(debugSymbolTable);
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uint8_t jump_to_bl[] =
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{
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0x07, 0xf0, 0xa0, 0xe1 // branch to r7
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};
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functionalPort->writeBlob(0x0, jump_to_bl, sizeof(jump_to_bl));
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inform("Using bootloader at address %#x\n", bootldr->entryPoint());
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}
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}
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void
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ArmSystem::initState()
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{
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System::initState();
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if (bootldr) {
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// Put the address of the boot loader into r7 so we know
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// where to branch to after the reset fault
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// All other values needed by the boot loader to know what to do
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for (int i = 0; i < threadContexts.size(); i++) {
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threadContexts[i]->setIntReg(3, kernelEntry & loadAddrMask);
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threadContexts[i]->setIntReg(4, params()->gic_cpu_addr);
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threadContexts[i]->setIntReg(5, params()->flags_addr);
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threadContexts[i]->setIntReg(7, bootldr->entryPoint());
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}
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if (!params()->gic_cpu_addr || !params()->flags_addr)
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fatal("gic_cpu_addr && flags_addr must be set with bootloader\n");
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} else {
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// Set the initial PC to be at start of the kernel code
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threadContexts[0]->pcState(kernelEntry & loadAddrMask);
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}
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for (int i = 0; i < threadContexts.size(); i++) {
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if (params()->midr_regval) {
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threadContexts[i]->setMiscReg(ArmISA::MISCREG_MIDR,
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params()->midr_regval);
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}
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}
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}
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ArmSystem::~ArmSystem()
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{
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if (debugPrintkEvent)
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delete debugPrintkEvent;
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}
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ArmSystem *
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ArmSystemParams::create()
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{
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return new ArmSystem(this);
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}
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