timer.cpp File Reference

#include <cpu_io.h>
#include <opensbi_interface.h>
#include "arch.h"
#include "basic_info.hpp"
#include "interrupt.h"
#include "kernel.h"
#include "task_manager.hpp"

Include dependency graph for timer.cpp:

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Typedefs
using	InterruptDelegate = InterruptBase::InterruptDelegate

Functions
auto	TimerInitSMP () -> void
	从核的定时器初始化
auto	TimerInit () -> void
	初始化定时器

Typedef Documentation

InterruptDelegate

using InterruptDelegate = InterruptBase::InterruptDelegate

Copyright

Copyright The SimpleKernel Contributors

Definition at line 14 of file timer.cpp.

Function Documentation

TimerInit()

auto TimerInit

(

)

-> void

初始化定时器

Precondition

InterruptInit 已完成

Postcondition

定时器中断已启用，系统 tick 开始计数

Definition at line 34 of file timer.cpp.

                         {
  // 计算 interval
  interval = BasicInfoSingleton::instance().interval / SIMPLEKERNEL_TICK;
 
  // 注册时钟中断
  InterruptSingleton::instance().RegisterInterruptFunc(
      cpu_io::ScauseInfo::kSupervisorTimerInterrupt,
      InterruptDelegate::create<TimerHandler>());
 
  // 开启时钟中断
  cpu_io::Sie::Stie::Set();
 
  // 设置初次时钟中断时间
  sbi_set_timer(cpu_io::Time::Read() + interval);
}

TimerInitSMP()

auto TimerInitSMP

(

)

-> void

从核的定时器初始化

Precondition

主核已完成 TimerInit，从核已完成 InterruptInitSMP

Postcondition

从核的定时器中断已启用

Definition at line 26 of file timer.cpp.

                            {
  // 开启时钟中断
  cpu_io::Sie::Stie::Set();
 
  // 设置初次时钟中断时间
  sbi_set_timer(cpu_io::Time::Read() + interval);
}