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176 lines
4.5 KiB
C
176 lines
4.5 KiB
C
#include "irq.h"
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// 对进行
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#if _INTR_8259A_
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#include "../driver/interrupt/8259A/8259A.h"
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#else
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#include "../driver/interrupt/apic/apic.h"
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#endif
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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" 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_table[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 中断注册函数
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*
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* @param irq_num 中断向量号
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* @param arg 传递给中断安装接口的参数
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* @param handler 中断处理函数
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* @param paramater 中断处理函数的参数
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* @param controller 中断控制器结构
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* @param irq_name 中断名
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* @return int
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*/
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int irq_register(ul irq_num, void *arg, void (*handler)(ul irq_num, ul parameter, struct pt_regs *regs), ul paramater, hardware_int_controller *controller, char *irq_name)
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{
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// 由于为I/O APIC分配的中断向量号是从32开始的，因此要减去32才是对应的interrupt_desc的元素
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irq_desc_t *p = &interrupt_desc[irq_num - 32];
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p->controller = controller;
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p->irq_name = irq_name;
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p->parameter = paramater;
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p->flags = 0;
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p->handler = handler;
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p->controller->install(irq_num, arg);
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p->controller->enable(irq_num);
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return 0;
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}
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/**
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* @brief 中断注销函数
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*
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* @param irq_num 中断向量号
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* @return int
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*/
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int irq_unregister(ul irq_num)
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{
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irq_desc_t *p = &interrupt_desc[irq_num - 32];
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p->controller->disable(irq_num);
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p->controller->uninstall(irq_num);
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p->controller = NULL;
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p->irq_name = NULL;
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p->parameter = NULL;
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p->flags = 0;
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p->handler = NULL;
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return 0;
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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 irq_init()
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{
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#if _INTR_8259A_
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init_8259A();
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#else
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memset(interrupt_desc, 0, sizeof(irq_desc_t) * IRQ_NUM);
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apic_init();
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#endif
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}
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