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🔧 改用local apic定时器进行进程时间片更新

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This commit is contained in:
fslongjin
2022-07-11 21:47:28 +08:00
parent 594aeadf65
commit defb9e769c
9 changed files with 220 additions and 51 deletions
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57
kernel/driver/interrupt/apic/apic_timer.h
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@ -3,7 +3,12 @@
#include <common/unistd.h>
#include "apic.h"
extern uint64_t apic_timer_ticksIn1ms;
extern uint64_t apic_timer_ticks_result;
// 5ms产生一次中断
#define APIC_TIMER_INTERVAL 5
#define APIC_TIMER_DIVISOR 3
#define APIC_TIMER_IRQ_NUM 151
/**
* @brief 设置apic定时器的分频计数
@ -27,34 +32,50 @@ extern uint64_t apic_timer_ticksIn1ms;
wrmsr(0x838, init_cnt); \
} while (0)
/**
* @brief 停止apic定时器
*
*/
#define apic_timer_stop() \
do \
{ \
wrmsr(0x832, APIC_LVT_INT_MASKED); \
} while (0)
/**
* @brief 设置apic定时器的lvt，并启动定时器
*
* @param vector 中断向量号
* @param mask 是否屏蔽（1：屏蔽， 0：不屏蔽）
* @param mode 计时模式
*/
#define apic_timer_set_LVT(vector, mode) \
do \
{ \
wrmsr(0x832, (mode << 17) | vector); \
io_mfence(); \
#define apic_timer_set_LVT(vector, mask, mode) \
do \
{ \
wrmsr(0x832, (mode << 17) | vector | (mask ? (APIC_LVT_INT_MASKED) : 0)); \
} while (0)
#define apic_timer_write_LVT(value) \
do \
{ \
wrmsr(0x832, value); \
} while (0)
/**
* @brief 获取apic定时器的LVT的值
*
*
*/
#define apic_timer_get_LVT() (rdmsr(0x832))
/**
* @brief 获取apic定时器当前计数值
*
*/
#define apic_timer_get_current() (rdmsr(0x839))
#define apic_timer_get_current() (rdmsr(0x839))
/**
* @brief 停止apic定时器
*
*/
#define apic_timer_stop() \
do \
{ \
uint64_t val = apic_timer_get_LVT(); \
val |= APIC_LVT_INT_MASKED; \
apic_timer_write_LVT(val); \
} while (0)
/**
* @brief 初始化local APIC定时器
*
*/
void apic_timer_init();