105 lines
3.0 KiB
C++
105 lines
3.0 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 ATA devices. */
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#ifndef ATA_BASE_DEVICE_H
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#define ATA_BASE_DEVICE_H
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#include <devices/common/ata/atadefs.h>
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#include <devices/common/hwcomponent.h>
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#include "endianswap.h"
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#include <cinttypes>
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#include <string>
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#include <functional>
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class IdeChannel;
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class AtaBaseDevice : public HWComponent, public AtaInterface
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{
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public:
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AtaBaseDevice(const std::string name, uint8_t type);
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~AtaBaseDevice() = default;
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void set_host(IdeChannel* host) { this->host_obj = host; };
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uint16_t read(const uint8_t reg_addr) override;
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void write(const uint8_t reg_addr, const uint16_t value) override;
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virtual int perform_command() = 0;
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int get_device_id() override { return this->my_dev_id; };
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void pdiag_callback() override {
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this->r_error &= 0x7F;
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};
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virtual void device_reset(bool is_soft_reset);
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virtual void device_set_signature();
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void device_control(const uint8_t new_ctrl);
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void update_intrq(uint8_t new_intrq_state);
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void signal_data_ready();
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bool has_data() {
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return data_ptr && xfer_cnt;
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}
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uint16_t get_data() {
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return BYTESWAP_16(*this->data_ptr++);
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}
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protected:
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bool is_selected() { return ((this->r_dev_head >> 4) & 1) == this->my_dev_id; };
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void prepare_xfer(int xfer_size, int block_size);
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uint8_t my_dev_id = 0; // my IDE device ID configured by the host
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uint8_t device_type = ata_interface::DEVICE_TYPE_UNKNOWN;
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uint8_t intrq_state = 0; // INTRQ deasserted
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IdeChannel* host_obj = nullptr;
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// IDE aka task file registers
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uint8_t r_error;
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uint8_t r_features;
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uint8_t r_sect_count;
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uint8_t r_sect_num;
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uint8_t r_cylinder_lo;
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uint8_t r_cylinder_hi;
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uint8_t r_dev_head;
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uint8_t r_command;
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uint8_t r_status;
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uint8_t r_status_save;
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uint8_t r_dev_ctrl = 0x08;
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uint16_t *data_ptr = nullptr;
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uint16_t *cur_data_ptr = nullptr;
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uint8_t data_buf[512] = {};
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int xfer_cnt = 0;
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int chunk_cnt = 0;
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int chunk_size = 0;
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std::function<void()> post_xfer_action = nullptr;
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};
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#endif // ATA_BASE_DEVICE_H
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