[yocto] "Kernel access of bad area" in kernel module

[Jack]

Hi,
I want to set/reset GPIO registers in freescale p1022 processor. I saw a
hello-mod kernel module in yocto and I added it to my image and it worked.
According to hello-mod kernel module, I created GPIO module like hello-mod.
But it GPIO module failed when I run it in kernel level. I checked several
times addresses of registers and it seems accurate. 
My code is here :


#include <linux/module.h>

int init_module(void)
{
	volatile uint32_t * Guts_Pmuxcr;
	volatile uint32_t * Gpio3_Gpdir;
	volatile uint32_t * Gpio3_Gpdat;
	
	// e500 Core View To Power Architecture CCSR: 0x0_FF70_0000

       // GUTS_PMUXCR:Alternate Function Signal Multiplex Control Register
	Guts_Pmuxcr = (volatile uint32_t *)(0xFF7E0060);
      
        // GPIO3_GPDIR: GPIO3 direction register
	Gpio3_Gpdir = (volatile uint32_t *)(0xFF70F200);

        // GPIO3_GPDAT: GPIO3 data register
	Gpio3_Gpdat = (volatile uint32_t *)(0xFF70F208); 
	 

	// Enable GPIO3[10]: IRQ_DEBUG1_GPIO FIELD [BIT 26] set to "1"
	*(Guts_Pmuxcr) = 0x00000010;
	 

	// Set Direction for GPIO3[10] to Output: FIELD DR10 [BIT 10] set to '1'
	*(Gpio3_Gpdir) = 0x00200000;
	
	 
	// Set GPIO3[10] to '0': FIELD D10 [BIT 10] set to '0'
	*(Gpio3_Gpdat) = 0x00000000;
	
	printk("Hello World!\n");
	return 0;
}

void cleanup_module(void)
{
	printk("Goodbye Cruel World!\n");
}

MODULE_LICENSE("GPL");


When I write insmod GPIO.ko in the terminal I get error these errors:

Unable to handle kernel paging request for data at address 0xff7e0060
faulting instruction address: 0xf107e05c
Oops: Kernel access of bad area, sig: 11 [#1]
..........
.........


How can I solve this problem?