mirror of
https://github.com/DragonOS-Community/DragonOS.git
synced 2025-06-18 08:06:32 +00:00
改用int250作为系统调用
This commit is contained in:
fslongjin
@ -436,7 +436,6 @@ void apic_init()
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{
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RCBA_vaddr = 0;
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kwarn("Cannot get RCBA address. RCBA_phys=%#010lx", RCBA_phys);
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}
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sti();
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}
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@ -448,50 +447,60 @@ void apic_init()
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*/
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void do_IRQ(struct pt_regs *rsp, ul number)
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{
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switch (number & 0x80) // 以0x80为界限，低于0x80的是外部中断控制器，高于0x80的是Local APIC
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if (number < 0x80) // 以0x80为界限，低于0x80的是外部中断控制器，高于0x80的是Local APIC
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// 外部中断控制器
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{
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case 0x00: // 外部中断控制器
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/* code */
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irq_desc_t *irq = &interrupt_desc[number - 32];
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// 执行中断上半部处理程序
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if (irq->handler != NULL)
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irq->handler(number, irq->parameter, rsp);
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else
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kwarn("Intr vector [%d] does not have a handler!");
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// 向中断控制器发送应答消息
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if (irq->controller != NULL && irq->controller->ack != NULL)
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irq->controller->ack(number);
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else
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{
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irq_desc_t *irq = &interrupt_desc[number - 32];
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// 执行中断上半部处理程序
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if (irq->handler != NULL)
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irq->handler(number, irq->parameter, rsp);
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else
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kwarn("Intr vector [%d] does not have a handler!");
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// 向中断控制器发送应答消息
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if (irq->controller != NULL && irq->controller->ack != NULL)
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irq->controller->ack(number);
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else
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{
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// 向EOI寄存器写入0x00表示结束中断
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__asm__ __volatile__("movq $0x00, %%rdx \n\t"
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"movq $0x00, %%rax \n\t"
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"movq $0x80b, %%rcx \n\t"
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"wrmsr \n\t" ::
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: "memory");
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}
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// 向EOI寄存器写入0x00表示结束中断
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__asm__ __volatile__("movq $0x00, %%rdx \n\t"
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"movq $0x00, %%rax \n\t"
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"movq $0x80b, %%rcx \n\t"
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"wrmsr \n\t" ::
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: "memory");
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}
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break;
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case 0x80:
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}
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else if (number >= 0x80 && number != 250)
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{
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printk_color(RED, BLACK, "SMP IPI [ %d ]\n", number);
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apic_local_apic_edge_ack(number);
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default:
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}
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else if (number == 250) // 系统调用
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{
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kdebug("receive syscall");
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kdebug("rflags=%#010lx", rsp->rflags);
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}
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else
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{
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kwarn("do IRQ receive: %d", number);
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break;
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}
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// 检测是否有未处理的软中断
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if (softirq_status != 0)
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do_softirq();
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// 检测当前进程是否可被调度
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struct process_control_block *current_proc = get_current_pcb();
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if (current_proc->flags & PROC_NEED_SCHED)
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if (current_pcb->flags & PROC_NEED_SCHED)
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{
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sched_cfs();
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}
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}
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/**
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@ -50,6 +50,7 @@ hardware_intr_controller HPET_intr_controller =
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void HPET_handler(uint64_t number, uint64_t param, struct pt_regs *regs)
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{
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printk("(HPET)");
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switch (param)
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{
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case 0: // 定时器0中断
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@ -73,7 +74,10 @@ void HPET_handler(uint64_t number, uint64_t param, struct pt_regs *regs)
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}
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if (sched_cfs_ready_queue.cpu_exec_proc_jiffies <= 0)
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{
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current_pcb->flags |= PROC_NEED_SCHED;
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kdebug("need_sched. proc_jiffies=%ld", sched_cfs_ready_queue.cpu_exec_proc_jiffies);
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}
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break;
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@ -138,7 +142,7 @@ int HPET_init()
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// 由于这段内存与io/apic的映射在同一物理页内，因此不需要重复映射
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HPET_REG_BASE = SPECIAL_MEMOEY_MAPPING_VIRT_ADDR_BASE + hpet_table->address;
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}
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// 读取计时精度并计算频率
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uint64_t tmp;
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tmp = *(uint64_t *)(HPET_REG_BASE + GCAP_ID);
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@ -152,18 +156,22 @@ int HPET_init()
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// 使用I/O APIC 的IRQ2接收hpet定时器0的中断
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apic_make_rte_entry(&entry, 34, IO_APIC_FIXED, DEST_PHYSICAL, IDLE, POLARITY_HIGH, IRR_RESET, EDGE_TRIGGER, MASKED, 0);
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*(uint64_t *)(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
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io_mfence();
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*(uint64_t *)(HPET_REG_BASE + MAIN_CNT) = 0;
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io_mfence();
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*(uint64_t *)(HPET_REG_BASE + TIM0_CONF) = 0x004c; // 设置定时器0为周期定时，边沿触发，投递到IO APIC的2号引脚（这里有点绕，写的是8259的引脚号，但是因为禁用了8259，因此会被路由到IO APIC的2号引脚）
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io_mfence();
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*(uint64_t *)(HPET_REG_BASE + TIM0_COMP) = HPET_freq; // 1s触发一次中断
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io_mfence();
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rtc_get_cmos_time(&rtc_now);
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*(uint64_t *)(HPET_REG_BASE + MAIN_CNT) = 0;
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kinfo("HPET Initialized.");
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*(uint64_t *)(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
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io_mfence();
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// 注册中断
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irq_register(34, &entry, &HPET_handler, 0, &HPET_intr_controller, "HPET0");
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kinfo("HPET Initialized.");
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}
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@ -22,7 +22,7 @@ enum CMOSTimeSelector
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int rtc_get_cmos_time(struct rtc_time_t *t)
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{
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// 为防止中断请求打断该过程，需要先关中断
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//cli();
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cli();
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uint8_t status_register_B = read_cmos(0x0B); // 读取状态寄存器B
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bool is_24h = ((status_register_B & 0x02) ? true : false); // 判断是否启用24小时模式
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@ -53,6 +53,6 @@ int rtc_get_cmos_time(struct rtc_time_t *t)
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if ((!is_24h) && t->hour & 0x80) // 将十二小时制转为24小时
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t->hour = ((t->hour & 0x7f) + 12) % 24;
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//sti();
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sti();
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return 0;
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}
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