mirror of
https://github.com/dingusdev/dingusppc.git
synced 2024-06-02 21:41:31 +00:00
d4c9db7fcf
Allows different implementations for different platforms (the JS build relies on browser APIs to stream disk images over the network). Setting aside the JS build, this also reduces some code duplication.
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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