#include "irq.h"
#include <common/errno.h>
#if _INTR_8259A_
#include <driver/interrupt/8259A/8259A.h>
#else
#include <driver/interrupt/apic/apic.h>
#endif
#include "gate.h"
#include <common/asm.h>
#include <common/printk.h>
#include <common/string.h>
#include <mm/slab.h>
extern void ignore_int();
#pragma GCC push_options
#pragma GCC optimize("O0")
// 保存函数调用现场的寄存器
#define SAVE_ALL_REGS \
"cld; \n\t" \
"pushq %rax; \n\t" \
"pushq %rax; \n\t" \
"movq %es, %rax; \n\t" \
"pushq %rax; \n\t" \
"movq %ds, %rax; \n\t" \
"pushq %rax; \n\t" \
"xorq %rax, %rax;\n\t" \
"pushq %rbp; \n\t" \
"pushq %rdi; \n\t" \
"pushq %rsi; \n\t" \
"pushq %rdx; \n\t" \
"pushq %rcx; \n\t" \
"pushq %rbx; \n\t" \
"pushq %r8 ; \n\t" \
"pushq %r9 ; \n\t" \
"pushq %r10; \n\t" \
"pushq %r11; \n\t" \
"pushq %r12; \n\t" \
"pushq %r13; \n\t" \
"pushq %r14; \n\t" \
"pushq %r15; \n\t" \
"movq $0x10, %rdx;\n\t" \
"movq %rdx, %ds; \n\t" \
"movq %rdx, %es; \n\t"
// 定义IRQ处理函数的名字格式：IRQ+中断号+interrupt
#define IRQ_NAME2(name1) name1##interrupt(void)
#define IRQ_NAME(number) IRQ_NAME2(IRQ##number)
// 构造中断entry
// 为了复用返回函数的代码，需要压入一个错误码0
// todo: 将这里改为volatile，也许能解决编译选项为O1时，系统崩溃的问题
#define Build_IRQ(number) \
void IRQ_NAME(number); \
__asm__(SYMBOL_NAME_STR(IRQ) #number "interrupt: \n\t" \
"pushq $0x00 \n\t" SAVE_ALL_REGS "movq %rsp, %rdi \n\t" \
"leaq ret_from_intr(%rip), %rax \n\t" \
"pushq %rax \n\t" \
"movq $" #number ", %rsi \n\t" \
"jmp do_IRQ \n\t");
// 构造中断入口
Build_IRQ(0x20);
Build_IRQ(0x21);
Build_IRQ(0x22);
Build_IRQ(0x23);
Build_IRQ(0x24);
Build_IRQ(0x25);
Build_IRQ(0x26);
Build_IRQ(0x27);
Build_IRQ(0x28);
Build_IRQ(0x29);
Build_IRQ(0x2a);
Build_IRQ(0x2b);
Build_IRQ(0x2c);
Build_IRQ(0x2d);
Build_IRQ(0x2e);
Build_IRQ(0x2f);
Build_IRQ(0x30);
Build_IRQ(0x31);
Build_IRQ(0x32);
Build_IRQ(0x33);
Build_IRQ(0x34);
Build_IRQ(0x35);
Build_IRQ(0x36);
Build_IRQ(0x37);
// 初始化中断数组
void (*interrupt_table[24])(void) = {
IRQ0x20interrupt, IRQ0x21interrupt, IRQ0x22interrupt, IRQ0x23interrupt, IRQ0x24interrupt, IRQ0x25interrupt,
IRQ0x26interrupt, IRQ0x27interrupt, IRQ0x28interrupt, IRQ0x29interrupt, IRQ0x2ainterrupt, IRQ0x2binterrupt,
IRQ0x2cinterrupt, IRQ0x2dinterrupt, IRQ0x2einterrupt, IRQ0x2finterrupt, IRQ0x30interrupt, IRQ0x31interrupt,
IRQ0x32interrupt, IRQ0x33interrupt, IRQ0x34interrupt, IRQ0x35interrupt, IRQ0x36interrupt, IRQ0x37interrupt,
};
/**
* @brief 声明10个IPI消息处理程序，向量号从200(0xc8)开始
*
*/
/*
*/
Build_IRQ(0xc8);
Build_IRQ(0xc9);
Build_IRQ(0xca);
Build_IRQ(0xcb);
Build_IRQ(0xcc);
Build_IRQ(0xcd);
Build_IRQ(0xce);
Build_IRQ(0xcf);
Build_IRQ(0xd0);
Build_IRQ(0xd1);
Build_IRQ(0x80); // 系统调用入口
void (*syscall_intr_table[1])(void) = {IRQ0x80interrupt};
// 初始化IPI中断服务程序数组
void (*SMP_interrupt_table[SMP_IRQ_NUM])(void) = {
IRQ0xc8interrupt, IRQ0xc9interrupt, IRQ0xcainterrupt, IRQ0xcbinterrupt, IRQ0xccinterrupt,
IRQ0xcdinterrupt, IRQ0xceinterrupt, IRQ0xcfinterrupt, IRQ0xd0interrupt, IRQ0xd1interrupt,
};
// 初始化local apic中断服务程序数组
Build_IRQ(0x96);
Build_IRQ(0x97);
Build_IRQ(0x98);
Build_IRQ(0x99);
Build_IRQ(0x9a);
Build_IRQ(0x9b);
Build_IRQ(0x9c);
Build_IRQ(0x9d);
Build_IRQ(0x9e);
Build_IRQ(0x9f);
void (*local_apic_interrupt_table[LOCAL_APIC_IRQ_NUM])(void) = {
IRQ0x96interrupt, IRQ0x97interrupt, IRQ0x98interrupt, IRQ0x99interrupt, IRQ0x9ainterrupt,
IRQ0x9binterrupt, IRQ0x9cinterrupt, IRQ0x9dinterrupt, IRQ0x9einterrupt, IRQ0x9finterrupt,
};
/**
* @brief 中断注册函数
*
* @param irq_num 中断向量号
* @param arg 传递给中断安装接口的参数
* @param handler 中断处理函数
* @param paramater 中断处理函数的参数
* @param controller 中断控制器结构
* @param irq_name 中断名
* @return int
*/
int irq_register(ul irq_num, void *arg, void (*handler)(ul irq_num, ul parameter, struct pt_regs *regs), ul paramater,
hardware_intr_controller *controller, char *irq_name)
{
// 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
irq_desc_t *p = NULL;
if (irq_num >= 32 && irq_num < 0x80)
p = &interrupt_desc[irq_num - 32];
else if (irq_num >= 150 && irq_num < 200)
p = &local_apic_interrupt_desc[irq_num - 150];
else
{
kerror("irq_register(): invalid irq num: %ld.", irq_num);
return -EINVAL;
}
p->controller = controller;
if (p->irq_name == NULL)
{
int namelen = sizeof(strlen(irq_name) + 1);
p->irq_name = (char *)kmalloc(namelen, 0);
memset(p->irq_name, 0, namelen);
strncpy(p->irq_name, irq_name, namelen);
}
p->parameter = paramater;
p->flags = 0;
p->handler = handler;
io_mfence();
p->controller->install(irq_num, arg);
io_mfence();
p->controller->enable(irq_num);
io_mfence();
return 0;
}
/**
* @brief 中断注销函数
*
* @param irq_num 中断向量号
* @return int
*/
int irq_unregister(ul irq_num)
{
irq_desc_t *p = &interrupt_desc[irq_num - 32];
p->controller->disable(irq_num);
p->controller->uninstall(irq_num);
p->controller = NULL;
if (p->irq_name)
kfree(p->irq_name);
p->irq_name = NULL;
p->parameter = NULL;
p->flags = 0;
p->handler = NULL;
return 0;
}
/**
* @brief 初始化中断模块
*/
void irq_init()
{
#if _INTR_8259A_
init_8259A();
#else
memset((void *)interrupt_desc, 0, sizeof(irq_desc_t) * IRQ_NUM);
apic_init();
#endif
}
#pragma GCC optimize("O0")