🔧 改用local apic定时器进行进程时间片更新

kernel/driver/interrupt/apic/apic_timer.c

@@ -1,3 +1,84 @@
 #include "apic_timer.h"
+#include <exception/irq.h>
+#include <process/process.h>
+#include <common/kprint.h>
+#include <sched/sched.h>
 
-uint64_t apic_timer_ticksIn1ms = 0;
+uint64_t apic_timer_ticks_result = 0;
+
+void apic_timer_enable(uint64_t irq_num)
+{
+    // 启动apic定时器
+    uint64_t val = apic_timer_get_LVT();
+    val &= (~APIC_LVT_INT_MASKED);
+    apic_timer_write_LVT(val);
+}
+
+void apic_timer_disable(uint64_t irq_num)
+{
+    apic_timer_stop();
+}
+
+/**
+ * @brief 安装local apic定时器中断
+ *
+ * @param irq_num 中断向量号
+ * @param arg 初始计数值
+ * @return uint64_t
+ */
+uint64_t apic_timer_install(ul irq_num, void *arg)
+{
+    // 设置div16
+    apic_timer_stop();
+    apic_timer_set_div(APIC_TIMER_DIVISOR);
+
+    // 设置初始计数
+    apic_timer_set_init_cnt(*(uint64_t *)arg);
+    // 填写LVT
+    apic_timer_set_LVT(APIC_TIMER_IRQ_NUM, 1, APIC_LVT_Timer_Periodic);
+}
+
+void apic_timer_uninstall(ul irq_num)
+{
+    apic_timer_write_LVT(APIC_LVT_INT_MASKED);
+}
+
+hardware_intr_controller apic_timer_intr_controller =
+    {
+        .enable = apic_timer_enable,
+        .disable = apic_timer_disable,
+        .install = apic_timer_install,
+        .uninstall = apic_timer_uninstall,
+        .ack = apic_local_apic_edge_ack,
+};
+
+/**
+ * @brief local apic定时器的中断处理函数
+ *
+ * @param number 中断向量号
+ * @param param 参数
+ * @param regs 寄存器值
+ */
+void apic_timer_handler(uint64_t number, uint64_t param, struct pt_regs *regs)
+{
+
+    sched_update_jiffies();
+}
+
+/**
+ * @brief 初始化local APIC定时器
+ *
+ */
+void apic_timer_init()
+{
+    if (apic_timer_ticks_result == 0)
+    {
+        kBUG("APIC timer ticks in 5ms is equal to ZERO!");
+        while (1)
+            hlt();
+    }
+    kinfo("Initializing apic timer for cpu %d", proc_current_cpu_id);
+    
+    irq_register(APIC_TIMER_IRQ_NUM, &apic_timer_ticks_result, &apic_timer_handler, 0, &apic_timer_intr_controller, "apic timer");
+    kinfo("Successfully initialized apic timer for cpu %d", proc_current_cpu_id);
+}