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🆕 中断上半部

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This commit is contained in:
fslongjin
2022-03-15 18:41:58 +08:00
parent c187ef152a
commit d4c07ac4ad
5 changed files with 404 additions and 8 deletions
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61
kernel/driver/interrupt/apic/apic.c
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@ -74,7 +74,7 @@ void apic_io_apic_init()
// 初始化RTE表项，将所有RTE表项屏蔽
for (int i = 0x10; i < 0x40; i += 2)
{
// 以0x20位起始中断向量号，初始化RTE
// 以0x20为起始中断向量号，初始化RTE
apic_ioapic_write_rte(i, 0x10020 + ((i - 0x10) >> 1));
}
@ -285,13 +285,24 @@ void apic_init()
* @brief 中断服务程序
*
* @param rsp 中断栈指针
* @param number 中断号
* @param number 中断向量号
*/
void do_IRQ(struct pt_regs *rsp, ul number)
{
unsigned char x = io_in8(0x60);
printk_color(BLUE, WHITE, "(IRQ:%#04x)\tkey code:%#04x\n", number, x);
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);
// 向中断控制器发送应答消息
if (irq->controller != NULL && irq->controller->ack != NULL)
irq->controller->ack(number);
// 向EOI寄存器写入0x00表示结束中断
io_mfence();
uint *eoi = (uint *)(APIC_LOCAL_APIC_VIRT_BASE_ADDR + LOCAL_APIC_OFFSET_Local_APIC_EOI);
@ -347,4 +358,50 @@ void apic_ioapic_write_rte(unsigned char index, ul value)
io_mfence();
*apic_ioapic_map.virtual_data_addr = value & 0xffffffff;
io_mfence();
}
// =========== 中断控制操作接口 ============
void apic_ioapic_enable(ul irq_num)
{
ul index = 0x10 + ((irq_num - 32) << 1);
ul value = apic_ioapic_read_rte(index);
value &= (~0x10000UL);
apic_ioapic_write_rte(index, value);
}
void apic_ioapic_disable(ul irq_num)
{
ul index = 0x10 + ((irq_num - 32) << 1);
ul value = apic_ioapic_read_rte(index);
value |= (0x10000UL);
apic_ioapic_write_rte(index, value);
}
ul apic_ioapic_install(ul irq_num, void *arg)
{
struct apic_IO_APIC_RTE_entry *entry = (struct apic_IO_APIC_RTE_entry *)arg;
// RTE表项值写入对应的RTE寄存器
apic_ioapic_write_rte(0x10 + ((irq_num - 32) << 1), *(ul *)entry);
return 0;
}
void apic_ioapic_uninstall(ul irq_num)
{
// 将对应的RTE表项设置为屏蔽状态
apic_ioapic_write_rte(0x10 + ((irq_num - 32) << 1), 0x10000UL);
}
void apic_ioapic_level_ack(ul irq_num) // 电平触发
{
// 向EOI寄存器写入0x00表示结束中断
uint *eoi = (uint *)(APIC_LOCAL_APIC_VIRT_BASE_ADDR + LOCAL_APIC_OFFSET_Local_APIC_EOI);
*eoi = 0x00;
*apic_ioapic_map.virtual_EOI_addr = irq_num;
}
void apic_ioapic_edge_ack(ul irq_num) // 边沿触发
{
// 向EOI寄存器写入0x00表示结束中断
uint *eoi = (uint *)(APIC_LOCAL_APIC_VIRT_BASE_ADDR + LOCAL_APIC_OFFSET_Local_APIC_EOI);
*eoi = 0x00;
}