9e3c8de30b
This patch is adding a clearer design intent to all objects that would not be complete without a port proxy by making the proxies members rathen than dynamically allocated. In essence, if NULL would not be a valid value for the proxy, then we avoid using a pointer to make this clear. The same approach is used for the methods using these proxies, such as loadSections, that now use references rather than pointers to better reflect the fact that NULL would not be an acceptable value (in fact the code would break and that is how this patch started out). Overall the concept of "using a reference to express unconditional composition where a NULL pointer is never valid" could be done on a much broader scale throughout the code base, but for now it is only done in the locations affected by the proxies.
130 lines
4.7 KiB
C++
130 lines
4.7 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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#include "mem/fs_translating_port_proxy.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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}
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void
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ArmSystem::initState()
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{
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// Moved from the constructor to here since it relies on the
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// address map being resolved in the interconnect
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// Call the initialisation of the super class
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System::initState();
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const Params* p = params();
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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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bootldr->loadSections(physProxy);
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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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physProxy.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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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 (!p->gic_cpu_addr || !p->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 (p->midr_regval) {
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threadContexts[i]->setMiscReg(ArmISA::MISCREG_MIDR,
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p->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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