78 lines
2.2 KiB
C++
78 lines
2.2 KiB
C++
/*
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DingusPPC - The Experimental PowerPC Macintosh emulator
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Copyright (C) 2018-24 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 definitions. */
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#ifndef ATA_HARD_DISK_H
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#define ATA_HARD_DISK_H
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#include <devices/common/ata/atabasedevice.h>
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#include <utils/imgfile.h>
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#include <string>
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#define ATA_HD_SEC_SIZE 512
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// C:16383 x H:16 x S:63 = C:1032 x H:254 x S:63 = 8063.5078125 MiB = 8.46 GB
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#define ATA_BIOS_LIMIT 16514064
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// C:65535 x H:16 x S:255 = 127.498 GiB = 136.900 GB = largest identify
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#define REAL_CHS_LIMIT 267382800
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// C:65536 x H:16 x S:255 = 127.500 GiB = 136.902 GB = largest address
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#define CHS_LIMIT 267386880
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class AtaHardDisk : public AtaBaseDevice
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{
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public:
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AtaHardDisk(std::string name);
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~AtaHardDisk() = default;
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static std::unique_ptr<HWComponent> create() {
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return std::unique_ptr<AtaHardDisk>(new AtaHardDisk("ATA-HD"));
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}
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int device_postinit() override;
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void insert_image(std::string filename);
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int perform_command() override;
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protected:
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void prepare_identify_info();
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uint64_t get_lba();
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void calc_chs_params();
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private:
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ImgFile hdd_img;
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uint64_t img_size = 0;
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uint32_t total_sectors = 0;
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uint64_t cur_fpos = 0;
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// fictive disk geometry for CHS-to-LBA translation
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uint16_t cylinders;
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uint8_t heads;
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uint8_t sectors;
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char * buffer = new char[1 <<17];
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uint8_t hd_id_data[ATA_HD_SEC_SIZE] = {};
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};
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#endif // ATA_HARD_DISK_H
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