lupio_tty.hh

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/*
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#ifndef __LUPIO_TTY_HH__
#define __LUPIO_TTY_HH__
 
#include "dev/io_device.hh"
#include "dev/lupio/lupio_pic.hh"
#include "dev/platform.hh"
#include "dev/serial/serial.hh"
#include "params/LupioTTY.hh"
 
namespace gem5
{
 
class Terminal;
class LupioTTY : public BasicPioDevice
{
  private:
    // Register map
    enum
    {
        LUPIO_TTY_WRIT,
        LUPIO_TTY_READ,
        LUPIO_TTY_CTRL,
        LUPIO_TTY_STAT,
 
        // Max offset
        LUPIO_TTY_MAX,
    };
 
    // Internal registers
    int8_t writChar;
    int8_t readChar;
    bool writIntrEn;
    bool readIntrEn;
 
    uint64_t lupioTTYRead(const uint8_t addr);
    void lupioTTYWrite(const uint8_t addr, uint64_t c);
    void lupioTTYUpdateIRQ();
 
    SerialDevice *terminal;
    const ByteOrder byteOrder = ByteOrder::little;
    Platform *platform;
 
  public:
    PARAMS(LupioTTY);
    LupioTTY(const Params &p);

    void dataAvailable();

    Tick read(PacketPtr pkt) override;
    Tick write(PacketPtr pkt) override;
};
 
} //namespace gem5
 
#endif // __LUPIO_TTY_HH__