mirror of
https://github.com/dingusdev/dingusppc.git
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ea9de4feaf
The call to the ScsiDevice superclass was using the name field (which was not initialized yet) instead of the name constructor argument
389 lines
12 KiB
C++
389 lines
12 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 Generic SCSI Hard Disk emulation. */
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#include <core/timermanager.h>
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#include <devices/common/scsi/scsi.h>
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#include <devices/common/scsi/scsihd.h>
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#include <devices/deviceregistry.h>
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#include <loguru.hpp>
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#include <machines/machineproperties.h>
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#include <memaccess.h>
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#include <fstream>
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#include <cstring>
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#define HDD_SECTOR_SIZE 512
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using namespace std;
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ScsiHardDisk::ScsiHardDisk(std::string name, int my_id) : ScsiDevice(name, my_id) {
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}
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void ScsiHardDisk::insert_image(std::string filename) {
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//We don't want to store everything in memory, but
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//we want to keep the hard disk available.
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if (!this->hdd_img.open(filename))
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ABORT_F("%s: could not open image file %s", this->name.c_str(), filename.c_str());
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this->img_size = this->hdd_img.size();
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this->total_blocks = (this->img_size + HDD_SECTOR_SIZE - 1) / HDD_SECTOR_SIZE;
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}
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void ScsiHardDisk::process_command() {
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uint32_t lba = 0;
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uint16_t transfer_len = 0;
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uint16_t alloc_len = 0;
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uint8_t page_code = 0;
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uint8_t subpage_code = 0;
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this->pre_xfer_action = nullptr;
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this->post_xfer_action = nullptr;
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// assume successful command execution
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this->status = ScsiStatus::GOOD;
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this->msg_buf[0] = ScsiMessage::COMMAND_COMPLETE;
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uint8_t* cmd = this->cmd_buf;
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switch (cmd[0]) {
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case ScsiCommand::TEST_UNIT_READY:
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test_unit_ready();
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break;
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case ScsiCommand::REWIND:
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rewind();
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break;
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case ScsiCommand::REQ_SENSE:
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alloc_len = cmd[4];
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req_sense(alloc_len);
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break;
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case ScsiCommand::FORMAT_UNIT:
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this->format();
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break;
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case ScsiCommand::INQUIRY:
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this->inquiry();
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break;
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case ScsiCommand::READ_6:
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lba = ((cmd[1] & 0x1F) << 16) + (cmd[2] << 8) + cmd[3];
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transfer_len = cmd[4];
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read(lba, transfer_len, 6);
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break;
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case ScsiCommand::READ_10:
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lba = (cmd[2] << 24) + (cmd[3] << 16) + (cmd[4] << 8) + cmd[5];
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transfer_len = (cmd[7] << 8) + cmd[8];
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read(lba, transfer_len, 10);
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break;
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case ScsiCommand::WRITE_6:
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lba = ((cmd[1] & 0x1F) << 16) + (cmd[2] << 8) + cmd[3];
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transfer_len = cmd[4];
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write(lba, transfer_len, 6);
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break;
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case ScsiCommand::WRITE_10:
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lba = (cmd[2] << 24) + (cmd[3] << 16) + (cmd[4] << 8) + cmd[5];
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transfer_len = (cmd[7] << 8) + cmd[8];
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write(lba, transfer_len, 10);
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this->switch_phase(ScsiPhase::DATA_OUT);
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break;
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case ScsiCommand::SEEK_6:
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lba = ((cmd[1] & 0x1F) << 16) + (cmd[2] << 8) + cmd[3];
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seek(lba);
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break;
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case ScsiCommand::MODE_SELECT_6:
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mode_select_6(cmd[4]);
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break;
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case ScsiCommand::MODE_SENSE_6:
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this->mode_sense_6();
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break;
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case ScsiCommand::READ_CAPACITY_10:
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this->read_capacity_10();
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break;
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case ScsiCommand::READ_BUFFER:
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read_buffer();
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break;
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default:
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LOG_F(WARNING, "%s: unrecognized command: %x", this->name.c_str(), cmd[0]);
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}
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}
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bool ScsiHardDisk::prepare_data() {
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switch (this->cur_phase) {
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case ScsiPhase::DATA_IN:
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this->data_ptr = (uint8_t*)this->img_buffer;
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this->data_size = this->bytes_out;
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break;
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case ScsiPhase::DATA_OUT:
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this->data_ptr = (uint8_t*)this->img_buffer;
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this->data_size = 0;
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break;
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case ScsiPhase::STATUS:
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if (!error) {
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this->img_buffer[0] = ScsiStatus::GOOD;
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} else {
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this->img_buffer[0] = ScsiStatus::CHECK_CONDITION;
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}
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this->data_size = 1;
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break;
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case ScsiPhase::MESSAGE_IN:
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this->img_buffer[0] = this->msg_code;
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this->data_size = 1;
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break;
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default:
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LOG_F(WARNING, "%s: unexpected phase in prepare_data", this->name.c_str());
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return false;
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}
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return true;
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}
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int ScsiHardDisk::test_unit_ready() {
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this->switch_phase(ScsiPhase::STATUS);
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return ScsiError::NO_ERROR;
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}
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int ScsiHardDisk::req_sense(uint16_t alloc_len) {
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if (alloc_len != 252) {
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LOG_F(WARNING, "%s: inappropriate Allocation Length: %d", this->name.c_str(),
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alloc_len);
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}
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return ScsiError::NO_ERROR; // placeholder - no sense
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}
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void ScsiHardDisk::inquiry() {
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int page_num = cmd_buf[2];
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int alloc_len = cmd_buf[4];
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if (page_num) {
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ABORT_F("%s: invalid page number in INQUIRY", this->name.c_str());
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}
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if (alloc_len >= 36) {
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this->img_buffer[0] = 0; // device type: Direct-access block device
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this->img_buffer[1] = 0; // non-removable media
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this->img_buffer[2] = 2; // ANSI version: SCSI-2
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this->img_buffer[3] = 1; // response data format
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this->img_buffer[4] = 0; // additional length
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this->img_buffer[5] = 0;
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this->img_buffer[6] = 0;
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this->img_buffer[7] = 0x18; // supports synchronous xfers and linked commands
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std::memcpy(img_buffer + 8, vendor_info, 8);
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std::memcpy(img_buffer + 16, prod_info, 16);
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std::memcpy(img_buffer + 32, rev_info, 4);
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this->bytes_out = 36;
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this->switch_phase(ScsiPhase::DATA_IN);
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}
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else {
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LOG_F(WARNING, "%s: allocation length too small: %d", this->name.c_str(),
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alloc_len);
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}
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}
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int ScsiHardDisk::send_diagnostic() {
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return 0x0;
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}
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void ScsiHardDisk::mode_select_6(uint8_t param_len) {
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if (!param_len) {
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this->switch_phase(ScsiPhase::STATUS);
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return;
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}
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this->incoming_size = param_len;
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std::memset(&this->img_buffer[0], 0xDD, HDD_SECTOR_SIZE);
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this->post_xfer_action = [this]() {
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// TODO: parse the received mode parameter list here
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};
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this->switch_phase(ScsiPhase::DATA_OUT);
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}
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static char Apple_Copyright_Page_Data[] = "APPLE COMPUTER, INC ";
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void ScsiHardDisk::mode_sense_6() {
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uint8_t page_code = this->cmd_buf[2] & 0x3F;
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uint8_t page_ctrl = this->cmd_buf[2] >> 6;
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uint8_t alloc_len = this->cmd_buf[4];
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this->img_buffer[ 0] = 13; // initial data size
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this->img_buffer[ 1] = 0; // medium type
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this->img_buffer[ 2] = 0; // medium is write enabled
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this->img_buffer[ 3] = 8; // block description length
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this->img_buffer[ 4] = 0; // density code
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this->img_buffer[ 5] = (this->total_blocks >> 16) & 0xFFU;
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this->img_buffer[ 6] = (this->total_blocks >> 8) & 0xFFU;
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this->img_buffer[ 7] = (this->total_blocks ) & 0xFFU;
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this->img_buffer[ 8] = 0;
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this->img_buffer[ 9] = 0; // sector size MSB
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this->img_buffer[10] = 2; // sector size
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this->img_buffer[11] = 0; // sector size LSB
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this->img_buffer[12] = page_code;
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switch(page_code) {
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case 1: // read-write error recovery page
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this->img_buffer[13] = 6; // data size - 1
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std::memset(&this->img_buffer[14], 0, 6);
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break;
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case 3: // Format device page
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this->img_buffer[13] = 22; // data size - 1
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std::memset(&this->img_buffer[14], 0, 22);
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// default values taken from Empire 540/1080S manual
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this->img_buffer[15] = 6; // tracks per defect zone
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this->img_buffer[17] = 1; // alternate sectors per zone
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this->img_buffer[23] = 92; // sectors per track in the outermost zone
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this->img_buffer[27] = 1; // interleave factor
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this->img_buffer[29] = 19; // track skew factor
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this->img_buffer[31] = 25; // cylinder skew factor
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this->img_buffer[32] = 0x80; // SSEC=1, HSEC=0, RMB=0, SURF=0, INS=0
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WRITE_WORD_BE_U(&this->img_buffer[24], 512); // bytes per sector
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break;
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case 0x30: // Copyright page for Apple certified drives
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this->img_buffer[13] = 22; // data size - 1
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std::memcpy(&this->img_buffer[14], Apple_Copyright_Page_Data, 22);
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break;
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default:
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ABORT_F("%s: unsupported page %d in MODE_SENSE_6", this->name.c_str(), page_code);
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};
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// adjust for overall mode sense data length
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this->img_buffer[0] += this->img_buffer[13] + 1;
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this->bytes_out = std::min(alloc_len, (uint8_t)this->img_buffer[0]);
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this->switch_phase(ScsiPhase::DATA_IN);
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}
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void ScsiHardDisk::read_capacity_10() {
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uint32_t lba = READ_DWORD_BE_U(&this->cmd_buf[2]);
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if (this->cmd_buf[1] & 1) {
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ABORT_F("%s: RelAdr bit set in READ_CAPACITY_10", this->name.c_str());
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}
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if (!(this->cmd_buf[8] & 1) && lba) {
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LOG_F(ERROR, "%s: non-zero LBA for PMI=0", this->name.c_str());
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this->status = ScsiStatus::CHECK_CONDITION;
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this->sense = ScsiSense::ILLEGAL_REQ;
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this->switch_phase(ScsiPhase::STATUS);
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return;
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}
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uint32_t last_lba = this->total_blocks - 1;
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uint32_t blk_len = HDD_SECTOR_SIZE;
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WRITE_DWORD_BE_A(&img_buffer[0], last_lba);
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WRITE_DWORD_BE_A(&img_buffer[4], blk_len);
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this->bytes_out = 8;
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this->switch_phase(ScsiPhase::DATA_IN);
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}
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void ScsiHardDisk::format() {
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LOG_F(WARNING, "%s: attempt to format the disk!", this->name.c_str());
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if (this->cmd_buf[1] & 0x10)
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ABORT_F("%s: defect list isn't supported yet", this->name.c_str());
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TimerManager::get_instance()->add_oneshot_timer(NS_PER_SEC, [this]() {
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this->switch_phase(ScsiPhase::STATUS);
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});
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}
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void ScsiHardDisk::read(uint32_t lba, uint16_t transfer_len, uint8_t cmd_len) {
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uint32_t transfer_size = transfer_len;
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std::memset(img_buffer, 0, sizeof(img_buffer));
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if (cmd_len == 6 && transfer_len == 0) {
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transfer_size = 256;
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}
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transfer_size *= HDD_SECTOR_SIZE;
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uint64_t device_offset = lba * HDD_SECTOR_SIZE;
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this->hdd_img.read(img_buffer, device_offset, transfer_size);
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this->bytes_out = transfer_size;
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this->switch_phase(ScsiPhase::DATA_IN);
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}
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void ScsiHardDisk::write(uint32_t lba, uint16_t transfer_len, uint8_t cmd_len) {
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uint32_t transfer_size = transfer_len;
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if (cmd_len == 6 && transfer_len == 0) {
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transfer_size = 256;
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}
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transfer_size *= HDD_SECTOR_SIZE;
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uint64_t device_offset = lba * HDD_SECTOR_SIZE;
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this->incoming_size = transfer_size;
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this->post_xfer_action = [this, device_offset]() {
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this->hdd_img.write(this->img_buffer, device_offset, this->incoming_size);
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};
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}
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void ScsiHardDisk::seek(uint32_t lba) {
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// No-op
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}
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void ScsiHardDisk::rewind() {
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// No-op
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}
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void ScsiHardDisk::read_buffer() {
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uint8_t mode = this->cmd_buf[1];
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uint32_t alloc_len = (this->cmd_buf[6] << 24) | (this->cmd_buf[7] << 16) |
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this->cmd_buf[8];
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switch(mode) {
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case 0: // Combined header and data mode
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WRITE_DWORD_BE_A(&this->img_buffer[0], 0x10000); // report buffer size of 64K
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break;
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default:
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ABORT_F("%s: unsupported mode %d in READ_BUFFER", this->name.c_str(), mode);
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}
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this->bytes_out = alloc_len;
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this->switch_phase(ScsiPhase::DATA_IN);
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}
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static const PropMap SCSI_HD_Properties = {
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{"hdd_img", new StrProperty("")},
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{"hdd_wr_prot", new BinProperty(0)},
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};
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static const DeviceDescription SCSI_HD_Descriptor =
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{ScsiHardDisk::create, {}, SCSI_HD_Properties};
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REGISTER_DEVICE(ScsiHD, SCSI_HD_Descriptor);
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