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改用int250作为系统调用

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This commit is contained in:
fslongjin
2022-04-12 11:54:44 +08:00
parent 011246281a
commit 2d7b2b7048
15 changed files with 236 additions and 104 deletions
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71
kernel/driver/interrupt/apic/apic.c
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@ -436,7 +436,6 @@ void apic_init()
{
RCBA_vaddr = 0;
kwarn("Cannot get RCBA address. RCBA_phys=%#010lx", RCBA_phys);
}
sti();
}
@ -448,50 +447,60 @@ void apic_init()
*/
void do_IRQ(struct pt_regs *rsp, ul number)
{
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
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
// 外部中断控制器
{
case 0x00: // 外部中断控制器
/* code */
irq_desc_t *irq = &interrupt_desc[number - 32];
// 执行中断上半部处理程序
if (irq->handler != NULL)
irq->handler(number, irq->parameter, rsp);
else
kwarn("Intr vector [%d] does not have a handler!");
// 向中断控制器发送应答消息
if (irq->controller != NULL && irq->controller->ack != NULL)
irq->controller->ack(number);
else
{
irq_desc_t *irq = &interrupt_desc[number - 32];
// 执行中断上半部处理程序
if (irq->handler != NULL)
irq->handler(number, irq->parameter, rsp);
else
kwarn("Intr vector [%d] does not have a handler!");
// 向中断控制器发送应答消息
if (irq->controller != NULL && irq->controller->ack != NULL)
irq->controller->ack(number);
else
{
// 向EOI寄存器写入0x00表示结束中断
__asm__ __volatile__("movq $0x00, %%rdx \n\t"
"movq $0x00, %%rax \n\t"
"movq $0x80b, %%rcx \n\t"
"wrmsr \n\t" ::
: "memory");
}
// 向EOI寄存器写入0x00表示结束中断
__asm__ __volatile__("movq $0x00, %%rdx \n\t"
"movq $0x00, %%rax \n\t"
"movq $0x80b, %%rcx \n\t"
"wrmsr \n\t" ::
: "memory");
}
break;
case 0x80:
}
else if (number >= 0x80 && number != 250)
{
printk_color(RED, BLACK, "SMP IPI [ %d ]\n", number);
apic_local_apic_edge_ack(number);
default:
}
else if (number == 250) // 系统调用
{
kdebug("receive syscall");
kdebug("rflags=%#010lx", rsp->rflags);
}
else
{
kwarn("do IRQ receive: %d", number);
break;
}
// 检测是否有未处理的软中断
if (softirq_status != 0)
do_softirq();
// 检测当前进程是否可被调度
struct process_control_block *current_proc = get_current_pcb();
if (current_proc->flags & PROC_NEED_SCHED)
if (current_pcb->flags & PROC_NEED_SCHED)
{
sched_cfs();
}
}
/**