linux – 内核函数asm_do_IRQ()中的irq与我在模块中请求的不同

我做了一些皮质-A9开发板的实验.我使用gpio_to_irq()获取irq num并且我请求了irq并用它写了一个小驱动程序,它在syslog中是196.我在asm_do_IRQ中添加了一些printks.当我触发gpio中断时,驱动程序工作正常,但asm_do_IRQ中的irq num为62.我无法理解.为什么irq号码与我要求的号码不同？司机如下：

#include <linux/module.h>
    #include <linux/interrupt.h>
    #include <linux/irq.h>
    #include <linux/gpio.h>

    #define GPIO_N 36     //gpio number

    int flag = 0;

    static irqreturn_t handler(int irq,void *dev_id)
    {
            printk("hello world hahahahahhahahah nn");
            return 0;
    }

    static int __init gpio_test_init(void)
    {
            if(gpio_request_one(GPIO_N,GPIOF_DIR_IN,"some test")<0)
            {
                    printk(KERN_ERR "Oops! BAD! BAD! BAD!nn");
                    return 0;
            }

            int irq,irq2;
            irq = OMAP_GPIO_IRQ(TEST_GPIO);
            printk("irq : %d n",irq,irq2);
            // ..................
            // irq : 196 in dmesg 
            //......................
            set_irq_type(irq,IRQ_TYPE_EDGE_FALLING);
            enable_irq(gpio_to_irq(GPIO_N));
            int err;
            // request the irq ...
            if((err = request_irq(irq,&handler,NULL,NULL))<0)
            {
                    printk("err : %dn",err);
                    return 0;
            }
            printk("gpio test init success!n");
            flag = 1;
            return 0;
    }
    static void __exit gpio_test_exit(void)
    {
            int irq = gpio_to_irq(TEST_GPIO);
            if(flag == 1)free_irq(irq,NULL);
            gpio_free(TEST_GPIO);
            printk("gpio test exit byebye!n");
    }

    module_init(gpio_test_init);
    module_exit(gpio_test_exit);
    MODULE_LICENSE("GPL");

arch / arm / kernel / irq.c中的asm_do_IRQ

asmlinkage void __exception_irq_entry
    asm_do_IRQ(unsigned int irq,struct pt_regs *regs)
    {
            struct pt_regs *old_regs = set_irq_regs(regs);
            printk("the irq : %dn",irq);  
            //............... 
            // I get 62 here
            //...............
            irq_enter();

            /*
             * Some hardware gives randomly wrong interrupts.  Rather
             * than crashing,do something sensible.
             */
            if (unlikely(irq >= nr_irqs)) {
                    if (printk_ratelimit())
                            printk(KERN_WARNING "Bad IRQ%un",irq);
                    ack_bad_irq(irq);
            } else {
                    generic_handle_irq(irq);
            }

            /* AT91 specific workaround */
            irq_finish(irq);

            irq_exit();

            set_irq_regs(old_regs);

    }

# mount -t debugfs none /sys/kernel/debug
# cat /sys/kernel/debug/irq_domain_mapping 
irq    hwirq    chip name        chip data   domain name
   16  0x00009  IPIC             0xcf801c80  /soc8347@e0000000/pic@700
   18  0x00012  IPIC             0xcf801c80  /soc8347@e0000000/pic@700
   19  0x0000e  IPIC             0xcf801c80  /soc8347@e0000000/pic@700
   20  0x0000f  IPIC             0xcf801c80  /soc8347@e0000000/pic@700
   21  0x00010  IPIC             0xcf801c80  /soc8347@e0000000/pic@700
   77  0x0004d  IPIC             0xcf801c80  /soc8347@e0000000/pic@700