Module machine

Machine related implementations.

Constants

• KSEG1 🔒
  The KSEG1 to visit the devices.
• MALTA_FPGA_BASE 🔒
  QEMU MMIO address definitions for FPGA (Used for halt).
• MALTA_PCIIO_BASE 🔒
  QEMU MMIO address definitions for PCIIO (Used for text I/O).
• MALTA_SERIAL_BASE 🔒
  16550 Serial UART device definitions (Base).
• MALTA_SERIAL_DATA 🔒
  16550 Serial UART device definitions (Data: Offset: 0x0).
• MALTA_SERIAL_DATA_READY 🔒
  Serial data is ready.
• MALTA_SERIAL_LSR 🔒
  16550 Serial UART device definitions (LSR: Offset: 0x5).
• MALTA_SERIAL_THR_EMPTY 🔒
  Serial the is empty.

Functions

• halt
  Actually trigger the reboot of the board. But in QEMU, we choose to ‘no-reboot’. So the simulation will exit if halt is called.
• print_charc
  Put the character (whose size is 1 byte) into teh serial. Busy-wait if the serial thr is not empty. The '\r' will be added before a '\n'.
• scan_charc
  Get a character (whose size is 1 byte) from the serial. Zero will be returned if the data is not ready for reading.