HardwareConfig.cc

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#include "HardwareConfig.hh"
#include "XMLLoader.hh"
#include "XMLException.hh"
#include "DeviceConfig.hh"
#include "XMLElement.hh"
#include "FileOperations.hh"
#include "MSXMotherBoard.hh"
#include "CartridgeSlotManager.hh"
#include "MSXCPUInterface.hh"
#include "CommandController.hh"
#include "DeviceFactory.hh"
#include "TclArgParser.hh"
#include "serialize.hh"
#include "serialize_stl.hh"
#include "unreachable.hh"
#include "view.hh"
#include "xrange.hh"
#include <cassert>
#include <iostream>
#include <memory>

using std::move;
using std::string;
using std::string_view;
using std::unique_ptr;
using std::vector;

namespace openmsx {

unique_ptr<HardwareConfig> HardwareConfig::createMachineConfig(
        MSXMotherBoard& motherBoard, string machineName)
{
        auto result = std::make_unique<HardwareConfig>(
                motherBoard, move(machineName));
        result->load("machines");
        return result;
}

unique_ptr<HardwareConfig> HardwareConfig::createExtensionConfig(
        MSXMotherBoard& motherBoard, string extensionName, string slotname)
{
        auto result = std::make_unique<HardwareConfig>(
                motherBoard, move(extensionName));
        result->load("extensions");
        result->setName(result->hwName);
        result->setSlot(move(slotname));
        return result;
}

unique_ptr<HardwareConfig> HardwareConfig::createRomConfig(
        MSXMotherBoard& motherBoard, string romfile,
        string slotname, span<const TclObject> options)
{
        auto result = std::make_unique<HardwareConfig>(motherBoard, "rom");
        result->setName(romfile);

        vector<string_view> ipsfiles;
        string mapper;
        ArgsInfo info[] = {
                valueArg("-ips", ipsfiles),
                valueArg("-romtype", mapper),
        };
        auto& interp = motherBoard.getCommandController().getInterpreter();
        auto args = parseTclArgs(interp, options, info);
        if (!args.empty()) {
                throw MSXException("Invalid option \"", args.front().getString(), '\"');
        }

        const auto& sramfile = FileOperations::getFilename(romfile);
        auto context = userFileContext(strCat("roms/", sramfile));
        for (const auto& ips : ipsfiles) {
                if (!FileOperations::isRegularFile(context.resolve(ips))) {
                        throw MSXException("Invalid IPS file: ", ips);
                }
        }

        string resolvedFilename = FileOperations::getAbsolutePath(
                context.resolve(romfile));
        if (!FileOperations::isRegularFile(resolvedFilename)) {
                throw MSXException("Invalid ROM file: ", resolvedFilename);
        }

        XMLElement extension("extension");
        auto& devices = extension.addChild("devices");
        auto& primary = devices.addChild("primary");
        primary.addAttribute("slot", slotname);
        auto& secondary = primary.addChild("secondary");
        secondary.addAttribute("slot", move(slotname));
        auto& device = secondary.addChild("ROM");
        device.addAttribute("id", "MSXRom");
        auto& mem = device.addChild("mem");
        mem.addAttribute("base", "0x0000");
        mem.addAttribute("size", "0x10000");
        auto& rom = device.addChild("rom");
        rom.addChild("resolvedFilename", resolvedFilename);
        rom.addChild("filename", move(romfile));
        if (!ipsfiles.empty()) {
                auto& patches = rom.addChild("patches");
                for (auto& s : ipsfiles) {
                        patches.addChild("ips", string(s));
                }
        }
        device.addChild("sound").addChild("volume", "9000");
        device.addChild("mappertype", mapper.empty() ? "auto" : std::move(mapper));
        device.addChild("sramname", strCat(sramfile, ".SRAM"));

        result->setConfig(move(extension));
        result->setFileContext(move(context));
        return result;
}

HardwareConfig::HardwareConfig(MSXMotherBoard& motherBoard_, string hwName_)
        : motherBoard(motherBoard_)
        , hwName(move(hwName_))
{
        for (auto ps : xrange(4)) {
                for (auto ss : xrange(4)) {
                        externalSlots[ps][ss] = false;
                }
                externalPrimSlots[ps] = false;
                expandedSlots[ps] = false;
                allocatedPrimarySlots[ps] = false;
        }
        userName = motherBoard.getUserName(hwName);
}

HardwareConfig::~HardwareConfig()
{
        motherBoard.freeUserName(hwName, userName);
#ifndef NDEBUG
        try {
                testRemove();
        } catch (MSXException& e) {
                std::cerr << e.getMessage() << '\n';
                UNREACHABLE;
        }
#endif
        while (!devices.empty()) {
                motherBoard.removeDevice(*devices.back());
                devices.pop_back();
        }
        auto& slotManager = motherBoard.getSlotManager();
        for (auto ps : xrange(4)) {
                for (auto ss : xrange(4)) {
                        if (externalSlots[ps][ss]) {
                                slotManager.removeExternalSlot(ps, ss);
                        }
                }
                if (externalPrimSlots[ps]) {
                        slotManager.removeExternalSlot(ps);
                }
                if (expandedSlots[ps]) {
                        motherBoard.getCPUInterface().unsetExpanded(ps);
                }
                if (allocatedPrimarySlots[ps]) {
                        slotManager.freePrimarySlot(ps, *this);
                }
        }
}

void HardwareConfig::testRemove() const
{
        std::vector<MSXDevice*> alreadyRemoved;
        for (auto& dev : view::reverse(devices)) {
                dev->testRemove(alreadyRemoved);
                alreadyRemoved.push_back(dev.get());
        }
        auto& slotManager = motherBoard.getSlotManager();
        for (auto ps : xrange(4)) {
                for (auto ss : xrange(4)) {
                        if (externalSlots[ps][ss]) {
                                slotManager.testRemoveExternalSlot(ps, ss, *this);
                        }
                }
                if (externalPrimSlots[ps]) {
                        slotManager.testRemoveExternalSlot(ps, *this);
                }
                if (expandedSlots[ps]) {
                        motherBoard.getCPUInterface().testUnsetExpanded(
                                ps, alreadyRemoved);
                }
        }
}

const XMLElement& HardwareConfig::getDevices() const
{
        return getConfig().getChild("devices");
}

static XMLElement loadHelper(const string& filename)
{
        try {
                return XMLLoader::load(filename, "msxconfig2.dtd");
        } catch (XMLException& e) {
                throw MSXException(
                        "Loading of hardware configuration failed: ",
                        e.getMessage());
        }
}

static string getFilename(string_view type, string_view name)
{
        auto context = systemFileContext();
        try {
                // try <name>.xml
                return context.resolve(FileOperations::join(
                        type, strCat(name, ".xml")));
        } catch (MSXException& e) {
                // backwards-compatibility:
                //  also try <name>/hardwareconfig.xml
                try {
                        return context.resolve(FileOperations::join(
                                type, name, "hardwareconfig.xml"));
                } catch (MSXException&) {
                        throw e; // signal first error
                }
        }
}

XMLElement HardwareConfig::loadConfig(string_view type, string_view name)
{
        return loadHelper(getFilename(type, name));
}

void HardwareConfig::load(string_view type)
{
        string filename = getFilename(type, hwName);
        setConfig(loadHelper(filename));

        assert(!userName.empty());
        const auto& dirname = FileOperations::getDirName(filename);
        setFileContext(configFileContext(dirname, hwName, userName));
}

void HardwareConfig::parseSlots()
{
        // TODO this code does parsing for both 'expanded' and 'external' slots
        //      once machine and extensions are parsed separately move parsing
        //      of 'expanded' to MSXCPUInterface
        //
        for (auto& psElem : getDevices().getChildren("primary")) {
                const auto& primSlot = psElem->getAttribute("slot");
                int ps = CartridgeSlotManager::getSlotNum(primSlot);
                if (psElem->getAttributeAsBool("external", false)) {
                        if (ps < 0) {
                                throw MSXException(
                                        "Cannot mark unspecified primary slot '",
                                        primSlot, "' as external");
                        }
                        if (psElem->hasChildren()) {
                                throw MSXException(
                                        "Primary slot ", ps,
                                        " is marked as external, but that would only "
                                        "make sense if its <primary> tag would be "
                                        "empty.");
                        }
                        createExternalSlot(ps);
                        continue;
                }
                for (auto& ssElem : psElem->getChildren("secondary")) {
                        const auto& secSlot = ssElem->getAttribute("slot");
                        int ss = CartridgeSlotManager::getSlotNum(secSlot);
                        if ((-16 <= ss) && (ss <= -1) && (ss != ps)) {
                                throw MSXException(
                                        "Invalid secondary slot specification: \"",
                                        secSlot, "\".");
                        }
                        if (ss < 0) {
                                if ((ss >= -128) && (0 <= ps) && (ps < 4) &&
                                    motherBoard.getCPUInterface().isExpanded(ps)) {
                                        ss += 128;
                                } else {
                                        continue;
                                }
                        }
                        if (ps < 0) {
                                if (ps == -256) {
                                        ps = getAnyFreePrimarySlot();
                                } else {
                                        ps = getSpecificFreePrimarySlot(-ps - 1);
                                }
                                auto mutableElem = const_cast<XMLElement*>(psElem);
                                mutableElem->setAttribute("slot", strCat(ps));
                        }
                        createExpandedSlot(ps);
                        if (ssElem->getAttributeAsBool("external", false)) {
                                if (ssElem->hasChildren()) {
                                        throw MSXException(
                                                "Secondary slot ", ps, '-', ss,
                                                " is marked as external, but that would "
                                                "only make sense if its <secondary> tag "
                                                "would be empty.");
                                }
                                createExternalSlot(ps, ss);
                        }
                }
        }
}

byte HardwareConfig::parseSlotMap() const
{
        byte initialPrimarySlots = 0;
        if (auto* slotmap = getConfig().findChild("slotmap")) {
                for (auto* child : slotmap->getChildren("map")) {
                        int page = child->getAttributeAsInt("page", -1);
                        if (page < 0 || page > 3) {
                                throw MSXException("Invalid or missing page in slotmap entry");
                        }
                        int slot = child->getAttributeAsInt("slot", -1);
                        if (slot < 0 || slot > 3) {
                                throw MSXException("Invalid or missing slot in slotmap entry");
                        }
                        unsigned offset = page * 2;
                        initialPrimarySlots &= ~(3 << offset);
                        initialPrimarySlots |= slot << offset;
                }
        }
        return initialPrimarySlots;
}

void HardwareConfig::createDevices()
{
        createDevices(getDevices(), nullptr, nullptr);
}

void HardwareConfig::createDevices(const XMLElement& elem,
        const XMLElement* primary, const XMLElement* secondary)
{
        for (auto& c : elem.getChildren()) {
                const auto& childName = c.getName();
                if (childName == "primary") {
                        createDevices(c, &c, secondary);
                } else if (childName == "secondary") {
                        createDevices(c, primary, &c);
                } else {
                        auto device = DeviceFactory::create(
                                DeviceConfig(*this, c, primary, secondary));
                        if (device) {
                                addDevice(move(device));
                        } else {
                                // device is nullptr, so we are apparently ignoring it on purpose
                        }
                }
        }
}

void HardwareConfig::createExternalSlot(int ps)
{
        motherBoard.getSlotManager().createExternalSlot(ps);
        assert(!externalPrimSlots[ps]);
        externalPrimSlots[ps] = true;
}

void HardwareConfig::createExternalSlot(int ps, int ss)
{
        motherBoard.getSlotManager().createExternalSlot(ps, ss);
        assert(!externalSlots[ps][ss]);
        externalSlots[ps][ss] = true;
}

void HardwareConfig::createExpandedSlot(int ps)
{
        if (!expandedSlots[ps]) {
                motherBoard.getCPUInterface().setExpanded(ps);
                expandedSlots[ps] = true;
        }
}

int HardwareConfig::getAnyFreePrimarySlot()
{
        int ps = motherBoard.getSlotManager().allocateAnyPrimarySlot(*this);
        assert(!allocatedPrimarySlots[ps]);
        allocatedPrimarySlots[ps] = true;
        return ps;
}

int HardwareConfig::getSpecificFreePrimarySlot(unsigned slot)
{
        int ps = motherBoard.getSlotManager().allocateSpecificPrimarySlot(slot, *this);
        assert(!allocatedPrimarySlots[ps]);
        allocatedPrimarySlots[ps] = true;
        return ps;
}

void HardwareConfig::addDevice(std::unique_ptr<MSXDevice> device)
{
        motherBoard.addDevice(*device);
        devices.push_back(move(device));
}

void HardwareConfig::setName(string_view proposedName)
{
        if (!motherBoard.findExtension(proposedName)) {
                name = proposedName;
        } else {
                unsigned n = 0;
                do {
                        name = strCat(proposedName, " (", ++n, ')');
                } while (motherBoard.findExtension(name));
        }
}

void HardwareConfig::setSlot(string slotname)
{
        for (auto& psElem : getDevices().getChildren("primary")) {
                const auto& primSlot = psElem->getAttribute("slot");
                if (primSlot == "any") {
                        auto& mutableElem = const_cast<XMLElement*&>(psElem);
                        mutableElem->setAttribute("slot", move(slotname));
                }
        }
}

// version 1: initial version
// version 2: moved FileContext here (was part of config)
// version 3: hold 'config' by-value instead of by-pointer
// version 4: hold 'context' by-value instead of by-pointer
template<typename Archive>
void HardwareConfig::serialize(Archive& ar, unsigned version)
{
        // filled-in by constructor:
        //   motherBoard, hwName, userName
        // filled-in by parseSlots()
        //   externalSlots, externalPrimSlots, expandedSlots, allocatedPrimarySlots

        if (ar.versionBelow(version, 2)) {
                XMLElement::getLastSerializedFileContext(); // clear any previous value
        }
        ar.serialize("config", config); // fills in getLastSerializedFileContext()
        if (ar.versionAtLeast(version, 2)) {
                if (ar.versionAtLeast(version, 4)) {
                        ar.serialize("context", context);
                } else {
                        std::unique_ptr<FileContext> ctxt;
                        ar.serialize("context", ctxt);
                        if (ctxt) context = *ctxt;
                }
        } else {
                auto ctxt = XMLElement::getLastSerializedFileContext();
                assert(ctxt);
                context = *ctxt;
        }
        if (ar.isLoader()) {
                if (!motherBoard.getMachineConfig()) {
                        // must be done before parseSlots()
                        motherBoard.setMachineConfig(this);
                } else {
                        // already set because this is an extension
                }
                parseSlots();
                createDevices();
        }
        // only (polymorphically) initialize devices, they are already created
        for (auto& d : devices) {
                ar.serializePolymorphic("device", *d);
        }
        ar.serialize("name", name);
}
INSTANTIATE_SERIALIZE_METHODS(HardwareConfig);

} // namespace openmsx