114 lines
3.3 KiB
C++
114 lines
3.3 KiB
C++
/*
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DingusPPC - The Experimental PowerPC Macintosh emulator
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Copyright (C) 2018-23 divingkatae and maximum
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(theweirdo) spatium
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(Contact divingkatae#1017 or powermax#2286 on Discord for more info)
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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/** IDE Channel (aka IDE port) emulation.
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One IDE channel is capable of controlling up to two IDE devices.
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This class handles device registration and passing of messages
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from and to the host.
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*/
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#include <devices/common/ata/atabasedevice.h>
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#include <devices/common/ata/atadefs.h>
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#include <devices/common/ata/idechannel.h>
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#include <devices/common/hwcomponent.h>
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#include <devices/deviceregistry.h>
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#include <machines/machinebase.h>
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#include <loguru.hpp>
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#include <cinttypes>
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#include <memory>
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#include <string>
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using namespace ata_interface;
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IdeChannel::IdeChannel(const std::string name)
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{
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this->set_name(name);
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this->supports_types(HWCompType::IDE_BUS);
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this->device_stub = std::unique_ptr<AtaNullDevice>(new AtaNullDevice());
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this->devices[0] = this->device_stub.get();
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this->devices[1] = this->device_stub.get();
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}
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int IdeChannel::device_postinit() {
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this->int_ctrl = dynamic_cast<InterruptCtrl*>(
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gMachineObj->get_comp_by_type(HWCompType::INT_CTRL));
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this->irq_id = this->int_ctrl->register_dev_int(
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this->name == "IDE0" ? IntSrc::IDE0 : IntSrc::IDE1);
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return 0;
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}
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void IdeChannel::register_device(int id, AtaInterface* dev_obj) {
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if (id < 0 || id >= 2)
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ABORT_F("%s: invalid device ID", this->name.c_str());
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this->devices[id] = dev_obj;
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((AtaBaseDevice*)dev_obj)->set_host(this);
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}
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uint32_t IdeChannel::read(const uint8_t reg_addr, const int size)
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{
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if (reg_addr == TIME_CONFIG) {
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if (size != 4) {
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LOG_F(WARNING, "%s: non-DWORD read from the channel config", this->name.c_str());
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}
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return this->ch_config;
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} else {
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return this->devices[this->cur_dev]->read(reg_addr);
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}
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}
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void IdeChannel::write(const uint8_t reg_addr, const uint32_t val, const int size)
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{
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if (reg_addr == TIME_CONFIG) {
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if (size != 4) {
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LOG_F(WARNING, "%s: non-DWORD write to the channel config", this->name.c_str());
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}
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this->ch_config = val;
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} else {
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// keep track of the currently selected device
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if (reg_addr == DEVICE_HEAD) {
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this->cur_dev = (val >> 4) & 1;
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}
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// redirect register writes to both devices
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for (auto& dev : this->devices) {
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dev->write(reg_addr, val);
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}
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}
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}
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static const DeviceDescription Ide0_Descriptor = {
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IdeChannel::create_first, {}, {}
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};
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static const DeviceDescription Ide1_Descriptor = {
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IdeChannel::create_second, {}, {}
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};
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REGISTER_DEVICE(Ide0, Ide0_Descriptor);
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REGISTER_DEVICE(Ide1, Ide1_Descriptor);
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