实现gettimeofday()系统调用和clocksource+timekeeping子模块 (#278)

- 实现gettimeofday()系统调用
- 实现clocksource+timekeeping子模块部分功能
- 实现了timespec转换成日期时间

kernel/src/driver/timers/HPET/HPET.c

@@ -207,12 +207,13 @@ void HPET_enable()
     // kdebug("[HPET0] conf register after modify=%#018lx", ((*(uint64_t *)(HPET_REG_BASE + TIM0_CONF))));
     // kdebug("[HPET1] conf register =%#018lx", ((*(uint64_t *)(HPET_REG_BASE + TIM1_CONF))));
 
-    kinfo("HPET0 enabled.");
-
-    __write8b(HPET_REG_BASE + GEN_CONF, 3); // 置位旧设备中断路由兼容标志位、定时器组使能标志位
-    io_mfence();
     // 注册中断
     irq_register(34, &entry, &HPET_handler, 0, &HPET_intr_controller, "HPET0");
+    io_mfence();
+    __write8b(HPET_REG_BASE + GEN_CONF, 3); // 置位旧设备中断路由兼容标志位、定时器组使能标志位
+    kinfo("HPET0 enabled.");
+
+    io_mfence();
 }
 
 int HPET_init()

kernel/src/driver/timers/rtc/rtc.rs

@@ -1,5 +1,6 @@
 use crate::{
-    arch::interrupt::{cli, sti},
+    arch::CurrentIrqArch,
+    exception::InterruptArch,
     include::bindings::bindings::{io_in8, io_out8},
     syscall::SystemError,
 };
@@ -33,7 +34,7 @@ impl RtcTime {
     ///@return int 成功则为0
     pub fn get(&mut self) -> Result<i32, SystemError> {
         // 为防止中断请求打断该过程，需要先关中断
-        cli();
+        let irq_guard = unsafe { CurrentIrqArch::save_and_disable_irq() };
         //0x0B
         let status_register_b: u8 = read_cmos(0x0B); // 读取状态寄存器B
         let is_24h: bool = if (status_register_b & 0x02) != 0 {
@@ -81,7 +82,7 @@ impl RtcTime {
             self.hour = ((self.hour & 0x7f) + 12) % 24;
         } // 将十二小时制转为24小时
 
-        sti();
+        drop(irq_guard);
 
         return Ok(0);
     }