gem5  v22.1.0.0
terminal.hh
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40 
41 /* @file
42  * User Terminal Interface
43  */
44 
45 #ifndef __DEV_TERMINAL_HH__
46 #define __DEV_TERMINAL_HH__
47 
48 #include <iostream>
49 
50 #include "base/callback.hh"
51 #include "base/circlebuf.hh"
52 #include "base/pollevent.hh"
53 #include "base/socket.hh"
54 #include "dev/serial/serial.hh"
55 #include "params/Terminal.hh"
56 #include "sim/sim_object.hh"
57 
58 namespace gem5
59 {
60 
61 class OutputStream;
62 class TerminalListener;
63 
64 class Terminal : public SerialDevice
65 {
66  protected:
67  class ListenEvent : public PollEvent
68  {
69  protected:
71 
72  public:
73  ListenEvent(Terminal *t, int fd, int e);
74  void process(int revent);
75  };
76 
77  friend class ListenEvent;
79 
80  class DataEvent : public PollEvent
81  {
82  protected:
84 
85  public:
86  DataEvent(Terminal *t, int fd, int e);
87  void process(int revent);
88  };
89 
90  friend class DataEvent;
92 
93  protected:
94  int number;
95  int data_fd;
96 
97  public:
98  typedef TerminalParams Params;
99  Terminal(const Params &p);
100  ~Terminal();
101  OutputStream * terminalDump(const TerminalParams &p);
102 
103  protected:
105 
106  void listen(int port);
107  void accept();
108 
109  protected:
113 #if TRACING_ON == 1
114  CircleBuf<char> linebuf;
115 #endif
116 
117  public:
119  // Terminal Interface
120 
121  void data();
122 
123  void read(uint8_t &c) { read(&c, 1); }
124  size_t read(uint8_t *buf, size_t len);
125  void write(uint8_t c) { write(&c, 1); }
126  size_t write(const uint8_t *buf, size_t len);
127  void detach();
128 
129  public: // SerialDevice interface
130  uint8_t readData() override;
131  void writeData(uint8_t c) override;
132  bool dataAvailable() const override { return !rxbuf.empty(); }
133 
134  public:
136  // OS interface
137 
138  // get a character from the terminal in the console specific format
139  // corresponds to GETC:
140  // retval<63:61>
141  // 000: success: character received
142  // 001: success: character received, more pending
143  // 100: failure: no character ready
144  // 110: failure: character received with error
145  // 111: failure: character received with error, more pending
146  // retval<31:0>
147  // character read from console
148  //
149  // Interrupts are cleared when the buffer is empty.
150  uint64_t console_in();
151 };
152 
153 } // namespace gem5
154 
155 #endif // __DEV_TERMINAL_HH__
bool empty() const
Definition: circlebuf.hh:71
Base class for serial devices such as terminals.
Definition: serial.hh:95
DataEvent(Terminal *t, int fd, int e)
Definition: terminal.cc:96
void process(int revent)
Definition: terminal.cc:102
void process(int revent)
Definition: terminal.cc:88
ListenEvent(Terminal *t, int fd, int e)
Definition: terminal.cc:82
void read(uint8_t &c)
Definition: terminal.hh:123
CircleBuf< char > rxbuf
Definition: terminal.hh:111
OutputStream * terminalDump(const TerminalParams &p)
Definition: terminal.cc:146
CircleBuf< char > txbuf
Definition: terminal.hh:110
void listen(int port)
Definition: terminal.cc:167
uint8_t readData() override
Read a character from the device.
Definition: terminal.cc:295
Terminal(const Params &p)
Definition: terminal.cc:118
OutputStream * outfile
Definition: terminal.hh:112
TerminalParams Params
Definition: terminal.hh:98
void detach()
Definition: terminal.cc:225
void writeData(uint8_t c) override
Transmit a character from the host interface to the device.
Definition: terminal.cc:327
void write(uint8_t c)
Definition: terminal.hh:125
void accept()
Definition: terminal.cc:189
ListenEvent * listenEvent
Definition: terminal.hh:78
ListenSocket listener
Definition: terminal.hh:104
uint64_t console_in()
Definition: terminal.cc:309
bool dataAvailable() const override
Check if there is pending data from the serial device.
Definition: terminal.hh:132
DataEvent * dataEvent
Definition: terminal.hh:91
uint16_t len
Definition: helpers.cc:62
Bitfield< 14, 12 > fd
Definition: types.hh:150
Bitfield< 9 > e
Definition: misc_types.hh:65
Bitfield< 2 > c
Definition: pagetable.hh:63
Bitfield< 51 > t
Definition: pagetable.hh:56
Bitfield< 54 > p
Definition: pagetable.hh:70
Reference material can be found at the JEDEC website: UFS standard http://www.jedec....

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