Initial prototyping for hard disks

devices/common/scsi/scsi.h

@@ -58,6 +58,42 @@ enum ScsiMsg : int {
     BUS_PHASE_CHANGE,
 };
 
+enum ScsiCommamd : int {
+    SCSI_TEST_UNITY_READY = 0x0,
+    SCSI_REWIND           = 0x1,
+    SCSI_REQ_SENSE        = 0x3,
+    SCSI_FORMAT           = 0x4,
+    SCSI_READ_BLK_LIMITS  = 0x5,
+    SCSI_READ_6           = 0x8,
+    SCSI_WRITE_6          = 0xA,
+    SCSI_SEEK_6           = 0xB,
+    SCSI_VERIFY_6         = 0x13,
+    SCSI_MODE_SELECT_6    = 0x15,
+    SCSI_ERASE_6          = 0x19,
+    SCSI_MODE_SENSE_6     = 0x1A,
+    SCSI_DIAG_RESULTS     = 0x1C,
+    SCSI_READ_CAPAC_10    = 0x25,
+    SCSI_READ_10          = 0x28,
+    SCSI_WRITE_10         = 0x2A,
+    SCSI_VERIFY_10        = 0x2F,
+    SCSI_READ_LONG_10     = 0x35,
+};
+
+enum ScsiSense : int {
+    SCSI_NO_SENSE       = 0x0,
+    SCSI_RECOVERED      = 0x1,
+    SCSI_NOT_READY      = 0x2,
+    SCSI_MEDIA_ERR      = 0x3,
+    SCSI_HW_ERROR       = 0x4,
+    SCSI_ILLEGAL_REQ    = 0x5,
+    SCSI_UNIT_ATTENTION = 0x6,
+    SCSI_DATA_PROTECT   = 0x7,
+    SCSI_BLANK_CHECK    = 0x8,
+    SCSI_MISCOMPARE     = 0xE,
+    SCSI_COMPLETED      = 0xF,
+
+};
+
 /** Standard SCSI bus timing values measured in ns. */
 #define BUS_SETTLE_DELAY    400
 #define BUS_FREE_DELAY      800

devices/harddrive/ata_hd.cpp

@@ -0,0 +1,19 @@
+#include "ata_hd.h"
+#include <fstream>
+#include <limits>
+#include <stdio.h>
+
+#define sector_size 512
+
+using namespace std;
+
+HardDrive::HardDrive(std::string filename) {
+    this->hdd_img;
+
+    // Taken from:
+    // https://stackoverflow.com/questions/22984956/tellg-function-give-wrong-size-of-file/22986486
+    this->hdd_img.ignore(std::numeric_limits<std::streamsize>::max());
+    this->img_size = this->hdd_img.gcount();
+    this->hdd_img.clear();    //  Since ignore will have set eof.
+    this->hdd_img.seekg(0, std::ios_base::beg);
+}

devices/harddrive/ata_hd.h

@@ -0,0 +1,17 @@
+
+/** @file ATA hard drive support */
+
+#ifndef SCSI_HD_H
+#define SCSI_HD_H
+
+#include <cinttypes>
+#include <stdio.h>
+#include <string>
+
+
+class ATAHardDrive {
+public:
+    ATAHardDrive(std::string filename);
+}
+
+#endif

devices/harddrive/scsi_hd.cpp

@@ -0,0 +1,72 @@
+#include "scsi_hd.h"
+#include <fstream>
+#include <limits>
+#include <stdio.h>
+
+#define sector_size 512
+
+using namespace std;
+
+HardDrive::HardDrive(std::string filename) {
+    supports_types(HWCompType::SCSI_DEV);
+
+    this->hdd_img.open(filename, ios::out | ios::in | ios::binary);
+
+    // Taken from:
+    // https://stackoverflow.com/questions/22984956/tellg-function-give-wrong-size-of-file/22986486
+    this->hdd_img.ignore(std::numeric_limits<std::streamsize>::max());
+    this->img_size = this->hdd_img.gcount();
+    this->hdd_img.clear();    //  Since ignore will have set eof.
+    this->hdd_img.seekg(0, std::ios_base::beg);
+}
+
+int HardDrive::test_unit_ready(){
+    return 0x0;
+}
+
+int HardDrive::req_sense(uint8_t alloc_len) {
+    if (alloc_len != 252) {
+        LOG_F(WARNING, "Inappropriate Allocation Length: %%d", alloc_len);
+    }
+    return 0x0; //placeholder - no sense
+}
+
+int HardDrive::inquiry() {
+    return 0x1000000F;
+}
+
+int HardDrive::send_diagnostic() {
+    return 0x0;
+}
+
+int HardDrive::read_capacity_10() {
+    return this->img_size;
+}
+
+void HardDrive::format() {
+}
+
+void HardDrive::read(uint32_t lba, uint16_t transfer_len) {
+    uint32_t final_transfer = (transfer_len == 0) ? 256 : transfer_len;
+    final_transfer          = transfer_len * sector_size;
+
+    this->hdd_img.seekg(lba * sector_size);
+    img_buffer = this->hdd_img.read(memblock, size);
+}
+
+void HardDrive::write(uint32_t lba, uint16_t transfer_len) {
+    uint32_t final_transfer = (transfer_len == 0) ? 256 : transfer_len;
+    final_transfer          = transfer_len * sector_size;
+
+    this->hdd_img.seekg(device_offset, this->hdd_img.beg);
+    this->hdd_img.write((char*)&read_buffer, sector_size);
+
+}
+
+void HardDrive::seek(uint32_t lba) {
+}
+
+
+void HardDrive::rewind() {
+    this->hdd_img.seekg(0, disk_image.beg);
+}

devices/harddrive/scsi_hd.h

@@ -0,0 +1,62 @@
+/*
+DingusPPC - The Experimental PowerPC Macintosh emulator
+Copyright (C) 2018-22 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 SCSI hard drive support */
+
+#ifndef SCSI_HD_H
+#define SCSI_HD_H
+
+#include <devices/common/scsi/scsi.h>
+#include <cinttypes>
+#include <stdio.h>
+#include <string>
+
+class HardDrive : public ScsiDevice {
+public:
+    HardDrive(std::string filename);
+    ~HardDrive() = default;
+
+    virtual void notify(ScsiMsg msg_type, int param){
+        return param;
+    };
+
+    int test_unit_ready();
+    int req_sense(uint8_t alloc_len);
+    int read_capacity_10();
+    int inquiry();
+    int send_diagnostic();
+
+    void format();
+    void read(uint32_t lba, uint16_t transfer_len);
+    void write(uint32_t lba, uint16_t transfer_len);
+    void seek(uint32_t lba);
+    void rewind();
+
+protected:
+    std::string img_path;
+    fstream hdd_img;
+    uint64_t img_size;
+    char img_buffer[1 << 17];
+    uint8_t scsi_command[12];
+    uint64_t file_offset = 0;
+}
+
+#endif