Problem reading and programming memory location...

[neorf3k]

Sorry, the address is 0x10020000.
I've executed this code:

/* code */
   unsigned char *virt_base;
    u8 regval;
    
    /* map 4kbyte reg. space */
    virt_base = ioremap(0x10020000, 0x1000);
    if (!virt_base) {
        printk("fpga ioremap failed\n");
        return;
    }
    
    regval = in_8(virt_base);
    
    
    printk("reg. value 0x%02x\n", regval);
    printk("reg. value %x\n", virt_base);
/* code */

and i've:

reg. value 0x10
address c90e8000

in U-BOOT in reg. value i've: 0xf8

Thank you so much again…

Lorenzo

On 14/nov/2013, at 10:09 AM, Anatolij Gustschin <agust at denx.de> wrote:

>  u8 regval;
> 
>   /* map 4kbyte reg. space */
>   virt_base = ioremap(0x10020000, 0x1000);
>   if (!virt_base) {
>     printk("fpga ioremap failed\n");
>     return;
>   }
> 
>   regval = in_8(virt_base);
> 
>   printk("reg. value 0x%02x\n", regval);

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