103 lines
3.2 KiB
C++
103 lines
3.2 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 ATA hard disk emulation. */
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#include <devices/common/ata/atahd.h>
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#include <cstring>
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#include <fstream>
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#include <string>
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#include <loguru.hpp>
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using namespace ata_interface;
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AtaHardDisk::AtaHardDisk() : AtaBaseDevice("ATA-HD", DEVICE_TYPE_ATA) {
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}
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void AtaHardDisk::insert_image(std::string filename) {
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if (!this->hdd_img.open(filename)) {
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ABORT_F("AtaHardDisk: could not open image file");
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}
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this->img_size = this->hdd_img.size();
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}
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int AtaHardDisk::perform_command()
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{
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LOG_F(INFO, "%s: command 0x%x requested", this->name.c_str(), this->r_command);
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this->r_status |= BSY;
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this->r_status &= ~DRDY;
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switch (this->r_command) {
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case NOP:
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break;
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case RECALIBRATE:
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this->r_error = 0;
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this->r_cylinder_lo = 0;
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this->r_cylinder_hi = 0;
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break;
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case READ_SECTOR:
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case READ_SECTOR_NR: {
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this->r_status |= DRQ;
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uint16_t sec_count = (this->r_sect_count == 0) ? 256 : this->r_sect_count;
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uint32_t sector = (r_sect_num << 16);
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sector |= ((this->r_cylinder_lo) << 8) + (this->r_cylinder_hi);
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uint64_t offset = sector * ATA_HD_SEC_SIZE;
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hdd_img.read(buffer, offset, sec_count * ATA_HD_SEC_SIZE);
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this->r_status &= ~DRQ;
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}
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break;
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case WRITE_SECTOR:
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case WRITE_SECTOR_NR: {
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this->r_status |= DRQ;
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uint16_t sec_count = (this->r_sect_count == 0) ? 256 : this->r_sect_count;
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uint32_t sector = (r_sect_num << 16);
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sector |= ((this->r_cylinder_lo) << 8) + (this->r_cylinder_hi);
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uint64_t offset = sector * ATA_HD_SEC_SIZE;
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hdd_img.write(buffer, offset, sec_count * ATA_HD_SEC_SIZE);
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this->r_status &= ~DRQ;
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}
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break;
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case INIT_DEV_PARAM:
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break;
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case DIAGNOSTICS: {
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this->r_status |= DRQ;
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int ret_code = this->r_error;
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this->r_status &= ~DRQ;
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return ret_code;
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}
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break;
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case IDENTIFY_DEVICE:
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this->r_status |= DRQ;
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std::memcpy(buffer, this->hd_id_data, ATA_HD_SEC_SIZE);
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this->r_status &= ~DRQ;
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break;
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default:
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LOG_F(ERROR, "%s: unknown ATA command 0x%x", this->name.c_str(), this->r_command);
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this->r_status &= ~BSY;
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this->r_status |= ERR;
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return -1;
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}
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this->r_status &= ~BSY;
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this->r_status |= DRDY;
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return 0;
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}
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