dingusppc/devices/common/ata/atabasedevice.h
2023-12-30 16:23:00 +01:00

105 lines
3.0 KiB
C++

/*
DingusPPC - The Experimental PowerPC Macintosh emulator
Copyright (C) 2018-23 divingkatae and maximum
(theweirdo) spatium
(Contact divingkatae#1017 or powermax#2286 on Discord for more info)
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
/** @file Base class for ATA devices. */
#ifndef ATA_BASE_DEVICE_H
#define ATA_BASE_DEVICE_H
#include <devices/common/ata/atadefs.h>
#include <devices/common/hwcomponent.h>
#include "endianswap.h"
#include <cinttypes>
#include <string>
#include <functional>
class IdeChannel;
class AtaBaseDevice : public HWComponent, public AtaInterface
{
public:
AtaBaseDevice(const std::string name, uint8_t type);
~AtaBaseDevice() = default;
void set_host(IdeChannel* host) { this->host_obj = host; };
uint16_t read(const uint8_t reg_addr) override;
void write(const uint8_t reg_addr, const uint16_t value) override;
virtual int perform_command() = 0;
int get_device_id() override { return this->my_dev_id; };
void pdiag_callback() override {
this->r_error &= 0x7F;
};
virtual void device_reset(bool is_soft_reset);
virtual void device_set_signature();
void device_control(const uint8_t new_ctrl);
void update_intrq(uint8_t new_intrq_state);
void signal_data_ready();
bool has_data() {
return data_ptr && xfer_cnt;
}
uint16_t get_data() {
return BYTESWAP_16(*this->data_ptr++);
}
protected:
bool is_selected() { return ((this->r_dev_head >> 4) & 1) == this->my_dev_id; };
void prepare_xfer(int xfer_size, int block_size);
uint8_t my_dev_id = 0; // my IDE device ID configured by the host
uint8_t device_type = ata_interface::DEVICE_TYPE_UNKNOWN;
uint8_t intrq_state = 0; // INTRQ deasserted
IdeChannel* host_obj = nullptr;
// IDE aka task file registers
uint8_t r_error;
uint8_t r_features;
uint8_t r_sect_count;
uint8_t r_sect_num;
uint8_t r_cylinder_lo;
uint8_t r_cylinder_hi;
uint8_t r_dev_head;
uint8_t r_command;
uint8_t r_status;
uint8_t r_status_save;
uint8_t r_dev_ctrl = 0x08;
uint16_t *data_ptr = nullptr;
uint16_t *cur_data_ptr = nullptr;
uint8_t data_buf[512] = {};
int xfer_cnt = 0;
int chunk_cnt = 0;
int chunk_size = 0;
std::function<void()> post_xfer_action = nullptr;
};
#endif // ATA_BASE_DEVICE_H