zynq linux 查看内存,linux-device-driver

我正在使用zynq板，z转，并且添加了来自PL的两个中断，我使用以下命令编辑了设备树：

amba_pl {

#address-cells = <0x1>;

#size-cells = <0x1>;

compatible = "simple-bus";

ranges;

gpio1@43c20000 {

#gpio-cells = <0x2>;

#interrupt-cells = <0x2>;

compatible = "generic-uio";

gpio-controller;

interrupt-controller;

interrupt-parent = ;

interrupts = <0x0 0x20 0x4>;

reg = <0x43c20000 0x10000>;

xlnx,all-inputs = <0x1>;

xlnx,all-inputs-2 = <0x0>;

xlnx,all-outputs = <0x0>;

xlnx,all-outputs-2 = <0x0>;

xlnx,dout-default = <0x0>;

xlnx,dout-default-2 = <0x0>;

xlnx,gpio-width = <0x3>;

xlnx,gpio2-width = <0x20>;

xlnx,interrupt-present = <0x1>;

xlnx,is-dual = <0x0>;

xlnx,tri-default = <0xffffffff>;

xlnx,tri-default-2 = <0xffffffff>;

};

gpio2@43c30000 {

#gpio-cells = <0x2>;

#interrupt-cells = <0x2>;

compatible = "generic-uio";

gpio-controller;

interrupt-controller;

interrupt-parent = ;

interrupts = <0x0 0x21 0x4>;

reg = <0x43c30000 0x10000>;

xlnx,all-inputs = <0x1>;

xlnx,all-inputs-2 = <0x0>;

xlnx,all-outputs = <0x0>;

xlnx,all-outputs-2 = <0x0>;

xlnx,dout-default = <0x0>;

xlnx,dout-default-2 = <0x0>;

xlnx,gpio-width = <0x3>;

xlnx,gpio2-width = <0x20>;

xlnx,interrupt-present = <0x1>;

xlnx,is-dual = <0x0>;

xlnx,tri-default = <0xffffffff>;

xlnx,tri-default-2 = <0xffffffff>;

};

};

并将其映射到中断，cat / proc / interrupts

57：52 0 GIC 57 cdns-i2c

61：1 0 GIC 61 SII902x_det

62：0 0 GIC 62逻辑vc

63：0 0 GIC 63 0-0053

64：2 0 GIC 64 gpio1

65：2 0 GIC 65 gpio2

然后我在中断的情况下创建了一个模块，并将它们注册到96和97(64 + 32)和(65 + 32)，代码为：

#include

#include

#include

#include

#include

#include

#include

#include

#include

#include

//#define INTERRUPT 96

#define INTERRUPT 96

MODULE_LICENSE("GPL");

static irqreturn_t interrupt_hook(int irq, void *dev_id, struct pt_regs *regs) {

printk("interrupt_hook!!\n");

return IRQ_HANDLED;

}

static int __init clcdint_init(void) {

unsigned int irq;

unsigned int irqflags;

int ret;

irq = INTERRUPT;

irqflags = IRQF_TRIGGER_RISING;

ret = request_irq(irq, interrupt_hook, irqflags, "int-test", NULL);

if(ret != 0) {

printk("ERROR: IRQ request failed %d", irq);

printk(" - code %d , EIO %d , EINVAL %d\n", ret, EIO, EINVAL);

}

printk("clcdint_init\n");

return 0;

}

module_init(clcdint_init);

static void __exit clcdint_exit(void) {

unsigned int irq;

irq=INTERRUPT;

free_irq(irq, NULL);

printk("clcdint_exit\n");

}

module_exit(clcdint_exit);

然后将其映射，我通过一个计数器和板上带有指示正确操作的LED的开关生成IRQ，这些功能映射到：

96：0 0 zynq-gpio 0完整测试

97：1 0 zynq-gpio 1 int-test2

在insmod之后，我得到\\ 0x1b [0; 31mZ-turn＃\\ 0x1b [m insmod driverirq146.ko成功：注册IRQ 97 clcdint_init2

但是IRQ并不经常发生，正如您在/ proc / interrupts计数器中看到的那样，它发生一次或两次，也许是在软件方面，如果有人提出任何建议。