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https://github.com/DragonOS-Community/DragonOS.git
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148 lines
3.6 KiB
C
148 lines
3.6 KiB
C
#include "irq.h"
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#include "8259A.h"
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#include "../common/asm.h"
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#include"../common/printk.h"
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#include "gate.h"
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// 保存函数调用现场的寄存器
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#define SAVE_ALL_REGS \
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"cld; \n\t" \
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"pushq %rax; \n\t" \
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"pushq %rax; \n\t" \
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"movq %es, %rax; \n\t" \
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"pushq %rax; \n\t" \
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"movq %ds, %rax; \n\t" \
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"pushq %rax; \n\t" \
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"xorq %rax, %rax;\n\t" \
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"pushq %rbp; \n\t" \
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"pushq %rdi; \n\t" \
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"pushq %rsi; \n\t" \
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"pushq %rdx; \n\t" \
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"pushq %rcx; \n\t" \
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"pushq %rbx; \n\t" \
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"pushq %r8 ; \n\t" \
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"pushq %r9 ; \n\t" \
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"pushq %r10; \n\t" \
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"pushq %r11; \n\t" \
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"pushq %r12; \n\t" \
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"pushq %r13; \n\t" \
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"pushq %r14; \n\t" \
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"pushq %r15; \n\t" \
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"movq $0x10, %rdx;\n\t" \
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"movq %rdx, %ds; \n\t" \
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"movq %rdx, %es; \n\t"
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// 定义IRQ处理函数的名字格式：IRQ+中断号+interrupt
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#define IRQ_NAME2(name1) name1##interrupt(void)
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#define IRQ_NAME(number) IRQ_NAME2(IRQ##number)
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// 构造中断entry
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// 为了复用返回函数的代码，需要压入一个错误码0
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#define Build_IRQ(number) \
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void IRQ_NAME(number); \
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__asm__ (SYMBOL_NAME_STR(IRQ)#number"interrupt: \n\t" \
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"pushq $0x00 \n\t" \
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SAVE_ALL_REGS \
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"movq %rsp, %rdi\n\t" \
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"leaq ret_from_intr(%rip), %rax\n\t" \
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"pushq %rax \n\t" \
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"movq $"#number", %rsi \n\t" \
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"jmp do_IRQ\n\t");
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// 构造中断入口
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Build_IRQ(0x20)
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Build_IRQ(0x21)
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Build_IRQ(0x22)
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Build_IRQ(0x23)
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Build_IRQ(0x24)
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Build_IRQ(0x25)
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Build_IRQ(0x26)
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Build_IRQ(0x27)
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Build_IRQ(0x28)
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Build_IRQ(0x29)
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Build_IRQ(0x2a)
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Build_IRQ(0x2b)
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Build_IRQ(0x2c)
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Build_IRQ(0x2d)
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Build_IRQ(0x2e)
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Build_IRQ(0x2f)
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Build_IRQ(0x30)
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Build_IRQ(0x31)
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Build_IRQ(0x32)
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Build_IRQ(0x33)
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Build_IRQ(0x34)
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Build_IRQ(0x35)
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Build_IRQ(0x36)
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Build_IRQ(0x37)
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// 初始化中断数组
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void (*interrupt[24])(void)=
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{
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IRQ0x20interrupt,
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IRQ0x21interrupt,
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IRQ0x22interrupt,
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IRQ0x23interrupt,
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IRQ0x24interrupt,
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IRQ0x25interrupt,
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IRQ0x26interrupt,
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IRQ0x27interrupt,
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IRQ0x28interrupt,
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IRQ0x29interrupt,
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IRQ0x2ainterrupt,
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IRQ0x2binterrupt,
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IRQ0x2cinterrupt,
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IRQ0x2dinterrupt,
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IRQ0x2einterrupt,
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IRQ0x2finterrupt,
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IRQ0x30interrupt,
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IRQ0x31interrupt,
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IRQ0x32interrupt,
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IRQ0x33interrupt,
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IRQ0x34interrupt,
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IRQ0x35interrupt,
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IRQ0x36interrupt,
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IRQ0x37interrupt,
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};
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/**
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* @brief 初始化中断模块
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*/
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void init_irq()
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{
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init_8259A();
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}
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/**
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* @brief 中断服务程序
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*
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* @param rsp 中断栈指针
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* @param number 中断号
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*/
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void do_IRQ(struct pt_regs *regs, ul number)
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{
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unsigned char x;
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switch (number)
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{
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case 0x20: // 时钟中断信号
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break;
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case 0x21: // 键盘中断
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x = io_in8(0x60);
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printk_color(ORANGE, BLACK, "Received key irq, key code:%#018lx\n", x);
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break;
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default:
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break;
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}
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if(number!=0x20)
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printk_color(ORANGE, BLACK, "Received irq:%#018x\n", number);
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// 向主芯片发送中断结束信号
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io_out8(PIC_master, PIC_EOI);
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} |