clint

Documentation

Overview

Package clint implements a driver for SiFive Core-Local Interruptor (CLINT) block adopting the following reference specifications:

• FU540C00RM - SiFive FU540-C000 Manual - v1p4 2021/03/25

This package is only meant to be used with `GOOS=tamago GOARCH=riscv64` as supported by the TamaGo framework for bare metal Go on RISC-V SoCs, see https://github.com/usbarmory/tamago.

Index

• Constants
• type CLINT
  • func (hw *CLINT) Mtime() uint64
  • func (hw *CLINT) Nanotime() int64
  • func (hw *CLINT) SetTimer(t int64)

Constants

const (
	MTIME = 0xbff8
)

CLINT registers

Types

type CLINT

type CLINT struct {
	// Base register
	Base uint64
	// CPU real time clock
	RTCCLK uint64
	// Timer offset in nanoseconds
	TimerOffset int64
}

CLINT represents a Core-Local Interruptor (CLINT) instance.

func (*CLINT) Mtime

func (hw *CLINT) Mtime() uint64

Mtime returns the number of cycles counted from the RTCCLK input.

func (*CLINT) Nanotime

func (hw *CLINT) Nanotime() int64

Nanotime returns the number of nanoseconds counted from the RTCCLK input plus the timer offset.

func (*CLINT) SetTimer

func (hw *CLINT) SetTimer(t int64)

SetTimer sets the timer to the argument nanoseconds value.