mirror of
https://github.com/akuker/RASCSI.git
synced 2024-11-29 16:49:55 +00:00
111 lines
2.6 KiB
C++
111 lines
2.6 KiB
C++
//---------------------------------------------------------------------------
|
||
//
|
||
// SCSI Target Emulator PiSCSI
|
||
// for Raspberry Pi
|
||
//
|
||
// Copyright (C) 2001-2006 ＰＩ．(ytanaka@ipc-tokai.or.jp)
|
||
// Copyright (C) 2014-2020 GIMONS
|
||
// Copyright (C) akuker
|
||
//
|
||
// Licensed under the BSD 3-Clause License.
|
||
// See LICENSE file in the project root folder.
|
||
//
|
||
//---------------------------------------------------------------------------
|
||
|
||
#pragma once
|
||
|
||
#include "shared/scsi.h"
|
||
#include "abstract_controller.h"
|
||
#include <array>
|
||
|
||
using namespace std;
|
||
|
||
class PrimaryDevice;
|
||
|
||
class ScsiController : public AbstractController
|
||
{
|
||
// For timing adjustments
|
||
static const unsigned int MIN_EXEC_TIME = 50;
|
||
|
||
// Transfer period factor (limited to 50 x 4 = 200ns)
|
||
static const int MAX_SYNC_PERIOD = 50;
|
||
|
||
// REQ/ACK offset(limited to 16)
|
||
static const uint8_t MAX_SYNC_OFFSET = 16;
|
||
|
||
const int DEFAULT_BUFFER_SIZE = 0x1000;
|
||
|
||
using scsi_t = struct _scsi_t {
|
||
// Synchronous transfer
|
||
bool syncenable; // Synchronous transfer possible
|
||
uint8_t syncperiod = MAX_SYNC_PERIOD; // Synchronous transfer period
|
||
uint8_t syncoffset; // Synchronous transfer offset
|
||
int syncack; // Number of synchronous transfer ACKs
|
||
|
||
// ATN message
|
||
bool atnmsg;
|
||
int msc;
|
||
array<uint8_t, 256> msb;
|
||
};
|
||
|
||
public:
|
||
|
||
ScsiController(BUS&, int);
|
||
~ScsiController() override = default;
|
||
|
||
void Reset() override;
|
||
|
||
bool Process(int) override;
|
||
|
||
int GetEffectiveLun() const override;
|
||
|
||
void Error(scsi_defs::sense_key sense_key, scsi_defs::asc asc = scsi_defs::asc::no_additional_sense_information,
|
||
scsi_defs::status status = scsi_defs::status::check_condition) override;
|
||
|
||
int GetInitiatorId() const override { return initiator_id; }
|
||
|
||
// Phases
|
||
void BusFree() override;
|
||
void Selection() override;
|
||
void Command() override;
|
||
void MsgIn() override;
|
||
void MsgOut() override;
|
||
void Status() override;
|
||
void DataIn() override;
|
||
void DataOut() override;
|
||
|
||
private:
|
||
|
||
// Execution start time
|
||
uint32_t execstart = 0;
|
||
|
||
// The initiator ID may be unavailable, e.g. with Atari ACSI and old host adapters
|
||
int initiator_id = UNKNOWN_INITIATOR_ID;
|
||
|
||
// The LUN from the IDENTIFY message
|
||
int identified_lun = -1;
|
||
|
||
// Data transfer
|
||
void Send();
|
||
bool XferMsg(int);
|
||
bool XferIn(vector<uint8_t>&);
|
||
bool XferOut(bool);
|
||
bool XferOutBlockOriented(bool);
|
||
void ReceiveBytes();
|
||
|
||
void DataOutNonBlockOriented() const;
|
||
void Receive();
|
||
|
||
// TODO Make non-virtual as soon as SysTimer calls do not segfault anymore on a regular PC, e.g. by using ifdef __arm__.
|
||
virtual void Execute();
|
||
|
||
void ProcessCommand();
|
||
void ParseMessage();
|
||
void ProcessMessage();
|
||
|
||
void Sleep();
|
||
|
||
scsi_t scsi = {};
|
||
};
|
||
|