#include "irq.h" #include #if _INTR_8259A_ #include #else #include #endif #include "gate.h" #include #include #include #include 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")