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Initial prototyping for hard disks
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@ -58,6 +58,42 @@ enum ScsiMsg : int {
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BUS_PHASE_CHANGE,
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};
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enum ScsiCommamd : int {
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SCSI_TEST_UNITY_READY = 0x0,
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SCSI_REWIND = 0x1,
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SCSI_REQ_SENSE = 0x3,
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SCSI_FORMAT = 0x4,
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SCSI_READ_BLK_LIMITS = 0x5,
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SCSI_READ_6 = 0x8,
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SCSI_WRITE_6 = 0xA,
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SCSI_SEEK_6 = 0xB,
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SCSI_VERIFY_6 = 0x13,
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SCSI_MODE_SELECT_6 = 0x15,
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SCSI_ERASE_6 = 0x19,
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SCSI_MODE_SENSE_6 = 0x1A,
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SCSI_DIAG_RESULTS = 0x1C,
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SCSI_READ_CAPAC_10 = 0x25,
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SCSI_READ_10 = 0x28,
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SCSI_WRITE_10 = 0x2A,
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SCSI_VERIFY_10 = 0x2F,
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SCSI_READ_LONG_10 = 0x35,
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};
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enum ScsiSense : int {
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SCSI_NO_SENSE = 0x0,
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SCSI_RECOVERED = 0x1,
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SCSI_NOT_READY = 0x2,
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SCSI_MEDIA_ERR = 0x3,
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SCSI_HW_ERROR = 0x4,
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SCSI_ILLEGAL_REQ = 0x5,
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SCSI_UNIT_ATTENTION = 0x6,
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SCSI_DATA_PROTECT = 0x7,
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SCSI_BLANK_CHECK = 0x8,
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SCSI_MISCOMPARE = 0xE,
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SCSI_COMPLETED = 0xF,
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};
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/** Standard SCSI bus timing values measured in ns. */
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#define BUS_SETTLE_DELAY 400
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#define BUS_FREE_DELAY 800
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19
devices/harddrive/ata_hd.cpp
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19
devices/harddrive/ata_hd.cpp
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@ -0,0 +1,19 @@
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#include "ata_hd.h"
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#include <fstream>
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#include <limits>
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#include <stdio.h>
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#define sector_size 512
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using namespace std;
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HardDrive::HardDrive(std::string filename) {
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this->hdd_img;
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// Taken from:
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// https://stackoverflow.com/questions/22984956/tellg-function-give-wrong-size-of-file/22986486
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this->hdd_img.ignore(std::numeric_limits<std::streamsize>::max());
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this->img_size = this->hdd_img.gcount();
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this->hdd_img.clear(); // Since ignore will have set eof.
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this->hdd_img.seekg(0, std::ios_base::beg);
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}
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17
devices/harddrive/ata_hd.h
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17
devices/harddrive/ata_hd.h
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@ -0,0 +1,17 @@
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/** @file ATA hard drive support */
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#ifndef SCSI_HD_H
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#define SCSI_HD_H
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#include <cinttypes>
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#include <stdio.h>
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#include <string>
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class ATAHardDrive {
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public:
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ATAHardDrive(std::string filename);
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}
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#endif
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72
devices/harddrive/scsi_hd.cpp
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72
devices/harddrive/scsi_hd.cpp
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@ -0,0 +1,72 @@
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#include "scsi_hd.h"
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#include <fstream>
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#include <limits>
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#include <stdio.h>
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#define sector_size 512
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using namespace std;
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HardDrive::HardDrive(std::string filename) {
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supports_types(HWCompType::SCSI_DEV);
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this->hdd_img.open(filename, ios::out | ios::in | ios::binary);
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// Taken from:
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// https://stackoverflow.com/questions/22984956/tellg-function-give-wrong-size-of-file/22986486
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this->hdd_img.ignore(std::numeric_limits<std::streamsize>::max());
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this->img_size = this->hdd_img.gcount();
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this->hdd_img.clear(); // Since ignore will have set eof.
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this->hdd_img.seekg(0, std::ios_base::beg);
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}
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int HardDrive::test_unit_ready(){
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return 0x0;
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}
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int HardDrive::req_sense(uint8_t alloc_len) {
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if (alloc_len != 252) {
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LOG_F(WARNING, "Inappropriate Allocation Length: %%d", alloc_len);
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}
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return 0x0; //placeholder - no sense
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}
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int HardDrive::inquiry() {
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return 0x1000000F;
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}
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int HardDrive::send_diagnostic() {
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return 0x0;
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}
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int HardDrive::read_capacity_10() {
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return this->img_size;
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}
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void HardDrive::format() {
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}
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void HardDrive::read(uint32_t lba, uint16_t transfer_len) {
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uint32_t final_transfer = (transfer_len == 0) ? 256 : transfer_len;
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final_transfer = transfer_len * sector_size;
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this->hdd_img.seekg(lba * sector_size);
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img_buffer = this->hdd_img.read(memblock, size);
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}
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void HardDrive::write(uint32_t lba, uint16_t transfer_len) {
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uint32_t final_transfer = (transfer_len == 0) ? 256 : transfer_len;
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final_transfer = transfer_len * sector_size;
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this->hdd_img.seekg(device_offset, this->hdd_img.beg);
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this->hdd_img.write((char*)&read_buffer, sector_size);
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}
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void HardDrive::seek(uint32_t lba) {
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}
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void HardDrive::rewind() {
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this->hdd_img.seekg(0, disk_image.beg);
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}
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62
devices/harddrive/scsi_hd.h
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62
devices/harddrive/scsi_hd.h
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@ -0,0 +1,62 @@
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/*
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DingusPPC - The Experimental PowerPC Macintosh emulator
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Copyright (C) 2018-22 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 SCSI hard drive support */
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#ifndef SCSI_HD_H
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#define SCSI_HD_H
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#include <devices/common/scsi/scsi.h>
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#include <cinttypes>
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#include <stdio.h>
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#include <string>
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class HardDrive : public ScsiDevice {
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public:
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HardDrive(std::string filename);
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~HardDrive() = default;
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virtual void notify(ScsiMsg msg_type, int param){
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return param;
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};
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int test_unit_ready();
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int req_sense(uint8_t alloc_len);
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int read_capacity_10();
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int inquiry();
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int send_diagnostic();
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void format();
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void read(uint32_t lba, uint16_t transfer_len);
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void write(uint32_t lba, uint16_t transfer_len);
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void seek(uint32_t lba);
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void rewind();
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protected:
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std::string img_path;
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fstream hdd_img;
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uint64_t img_size;
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char img_buffer[1 << 17];
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uint8_t scsi_command[12];
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uint64_t file_offset = 0;
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}
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#endif
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