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

Include dependency graph for timer.cpp:

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 47 of file timer.cpp.

                         {
  // 计算 interval
  interval = BasicInfoSingleton::instance().interval / SIMPLEKERNEL_TICK;
 
  // 获取定时器中断号
  timer_intid = KernelFdtSingleton::instance()
                    .GetAarch64Intid("arm,armv8-timer")
                    .value() +
                Gic::kPpiBase;
 
  InterruptSingleton::instance().RegisterInterruptFunc(
      timer_intid, InterruptDelegate::create<TimerHandler>());
 
  InterruptSingleton::instance().Ppi(timer_intid, cpu_io::GetCurrentCoreId());
 
  cpu_io::CNTV_CTL_EL0::ENABLE::Clear();
  cpu_io::CNTV_CTL_EL0::IMASK::Set();
 
  cpu_io::CNTV_TVAL_EL0::Write(interval);
 
  cpu_io::CNTV_CTL_EL0::ENABLE::Set();
  cpu_io::CNTV_CTL_EL0::IMASK::Clear();
}

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◆ 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 35 of file timer.cpp.

                            {
  InterruptSingleton::instance().Ppi(timer_intid, cpu_io::GetCurrentCoreId());
 
  cpu_io::CNTV_CTL_EL0::ENABLE::Clear();
  cpu_io::CNTV_CTL_EL0::IMASK::Set();
 
  cpu_io::CNTV_TVAL_EL0::Write(interval);
 
  cpu_io::CNTV_CTL_EL0::ENABLE::Set();
  cpu_io::CNTV_CTL_EL0::IMASK::Clear();
}