mirror of
https://github.com/dingusdev/dingusppc.git
synced 2024-07-27 05:28:58 +00:00
637844269f
The disk cache is unchanged. data_ptr continues to be only used for the user data sector area for each block. The other sector areas (synch, header, etc.) are filled in while reading. has_data and get_data exist as a way to bypass data_ptr for parts of the transfer outside the user data sector area of each block. The default behaviour is defined in atabasedevice and is overridden by atapicdrom for the Read CD command. atapicdrom has a flag doing_sector_areas to control the behavior of the get_data method. When the flag is true, the sector_areas, current_block, and current_block_byte are used for selecting the correct data from one of the sector areas. The Read CD command initializes those variables. xfer_cnt remains the total number of bytes to be transferred and is now not necessarily the same as the number of disk image blocks read into the disk cache. lba_to_msf is used to fill in the header. The values was not verified using a real CD. Mac OS X just cares about the Mode in the header. For now, only the synch and header and user data areas are filled in. The other areas read as all zeros.
96 lines
2.7 KiB
C++
96 lines
2.7 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/ata/idechannel.h>
|
|
#include <devices/common/hwcomponent.h>
|
|
#include "endianswap.h"
|
|
|
|
#include <cinttypes>
|
|
#include <string>
|
|
|
|
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);
|
|
|
|
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; };
|
|
|
|
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;
|
|
uint8_t data_buf[512] = {};
|
|
int data_pos = 0;
|
|
int xfer_cnt = 0;
|
|
};
|
|
|
|
#endif // ATA_BASE_DEVICE_H
|