mirror of
https://github.com/dingusdev/dingusppc.git
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35c86ad6bf
Result of running IWYU (https://include-what-you-use.org/) and applying most of the suggestions about unncessary includes and forward declarations. Was motivated by observing that <thread> was being included in ppcopcodes.cpp even though it was unused (found while researching the use of threads), but seems generally good to help with build times and correctness.
109 lines
3.1 KiB
C++
109 lines
3.1 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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/** @file Base class for Apple Desktop Bus devices. */
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#include <core/timermanager.h>
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#include <devices/common/adb/adbdevice.h>
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#include <devices/common/adb/adbbus.h>
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#include <machines/machinebase.h>
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AdbDevice::AdbDevice(std::string name) {
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this->set_name(name);
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this->supports_types(HWCompType::ADB_DEV);
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}
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int AdbDevice::device_postinit() {
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// register itself with the ADB host
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this->host_obj = dynamic_cast<AdbBus*>(gMachineObj->get_comp_by_type(HWCompType::ADB_HOST));
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this->host_obj->register_device(this);
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return 0;
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};
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uint8_t AdbDevice::poll() {
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if (!this->srq_flag) {
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return 0;
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}
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bool has_data = this->get_register_0();
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if (!has_data) {
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return 0;
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}
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// Register 0 in bits 0-1 (both 0)
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// Talk command in bits 2-3 (both 1)
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// Device address in bits 4-7
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return 0xC | (this->my_addr << 4);
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}
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bool AdbDevice::talk(const uint8_t dev_addr, const uint8_t reg_num) {
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if (dev_addr == this->my_addr && !this->got_collision) {
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// see if another device already responded to this command
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if (this->host_obj->already_answered()) {
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this->got_collision = true;
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return false;
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}
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switch(reg_num & 3) {
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case 0:
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return this->get_register_0();
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case 1:
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return this->get_register_1();
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case 2:
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return this->get_register_2();
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case 3:
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return this->get_register_3();
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default:
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return false;
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}
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} else {
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return false;
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}
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}
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void AdbDevice::listen(const uint8_t dev_addr, const uint8_t reg_num) {
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if (dev_addr == this->my_addr) {
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switch(reg_num & 3) {
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case 0:
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this->set_register_0();
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case 1:
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this->set_register_1();
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case 2:
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this->set_register_2();
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case 3:
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this->set_register_3();
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}
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}
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}
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bool AdbDevice::get_register_3() {
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uint8_t* out_buf = this->host_obj->get_output_buf();
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out_buf[0] = this->gen_random_address() | (this->exc_event_flag << 6) |
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(this->srq_flag << 5);
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out_buf[1] = this->dev_handler_id;
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this->host_obj->set_output_count(2);
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return true;
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}
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uint8_t AdbDevice::gen_random_address() {
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return (TimerManager::get_instance()->current_time_ns() + 8) & 0xF;
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}
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